Journal articles: 'Fines production'

1

Buravchuk, N. I., and O. V. Guryanova. "Production of fuel briquettes from anthracite fines." Solid Fuel Chemistry 48, no. 4 (July 2014): 260–64. http://dx.doi.org/10.3103/s036152191404003x.

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Guimaraes, M. S., J. R. Valdes, A. M. Palomino, and J. C. Santamarina. "Aggregate production: Fines generation during rock crushing." International Journal of Mineral Processing 81, no. 4 (January 2007): 237–47. http://dx.doi.org/10.1016/j.minpro.2006.08.004.

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Brožovský, Jiří. "Masonry Cements with Fines from Aggregate Production." Advanced Materials Research 1000 (August 2014): 211–14. http://dx.doi.org/10.4028/www.scientific.net/amr.1000.211.

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Masonry cement consists of Portland cement, inorganic materials and optional additives. Natural mineral materials are included in inorganic materials. The paper states knowledge gained during research of properties of masonry cements in which fine parts originating in production of aggregate of two types – amphibolite and grandiorite – were used as inorganic content. If the content of fine parts in cement is from 50% to 75%, masonry cement of strength marks 5 and 12.5 can be produced.

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Zhou, Wen Juan, Wei Niu, Jia Long Chen, and Gui Bin Ji. "Influence of the Fineness of Micro-Fines on the Performance of Cement and Mortar." Key Engineering Materials 477 (April 2011): 102–7. http://dx.doi.org/10.4028/www.scientific.net/kem.477.102.

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With the rapid development of fundamental construction, natural sand resources is getting less and less, artificial sand has become a new kind of sand source. Artificial sand’s production can produce a certain amount of aggragate micro-fines, rational use of micro-fines will be an important factor about affecting application of artificial sand. In this paper，impact of fineness and volume of artificial sand on cement and mortar performance is studied systematically, provides technical basis for the effective use of micro-fines. The experimental results show that micro-fines decreases water requirement of normal consistency and shorten setting time of cement, appropriate fineness micro-fines will reduce water requirement, improve strength, less shrinkage of mortar. The pore structure results show, finer micro-fines refines the pore structure, reduces the porosity of mortar.

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Tan, Yunhui, Yan Li, Margaretha C. M. Rijken, Karim Zaki, Bin Wang, Ruiting Wu, Oya Karazincir, and Wade Williams. "Modeling of Production Decline Caused by Fines Migration in Deepwater Reservoirs." SPE Journal 25, no. 01 (August 13, 2019): 391–405. http://dx.doi.org/10.2118/187263-pa.

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Summary Many deepwater wells experience steep productivity declines. Some field observations indicate that this decline is partly attributable to fines-migration effects. In this paper, we present a numerical workflow to simulate the effect (over time) of flow-induced fines migration on production decline in deepwater reservoirs. A permeability-reduction function was extracted from long-term coreflood tests and implemented into a reservoir simulator. Using the permeability-reduction function, production degradation caused by fines migration was simulated in a detailed single-well model. From previous research, it was understood that fines migration does not start until the flow velocity is greater than the critical velocity. After many long-term coreflood tests, or extended fines-migration (EFM) tests, we concluded that the permeability damage induced by fines migration is a function of the pore-volume (PV) throughput (fluid volume flowing through the core divided by the PV of the core). To address these observations, the numerical model was updated such that the interstitial flow velocity was tracked in each individual cell. When the interstitial velocity is greater than the critical velocity, the cell's permeability follows the permeability-reduction trend obtained from laboratory data. Validation of the workflow is performed using a cylinder model to match the laboratory test core-plug data. A detailed 3D model was constructed to study the fines-migration effect in each part of the near-wellbore (e.g., perforation, fracture) region and the reservoir. As expected, fines migration started near the perforation where the flow velocity was the highest. Depending on the permeability-decline rate, the production asymptotes eventually reached a constant value after a certain period. Both the decline rate and the ultimate residual permeability had a strong effect on the final production. Sensitivities were run to study the effect of fines migration in different completions. To the authors’ understanding, this is the first time that laboratory-based fines-migration data were incorporated into a reservoir simulator to predict the production decline using experiment-based fines-migration functions. This workflow will help reservoir engineers predict the damage caused by fines migration, predict production decline, and plan for remediation.

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Peng, Xiaolong, Suyang Zhu, Zhenjiang You, Zhimin Du, Peng Deng, Chaowen Wang, and Mingwei Wang. "Numerical Simulation Study of Fines Migration Impacts on an Early Water Drainage Period in Undersaturated Coal Seam Gas Reservoirs." Geofluids 2019 (December 30, 2019): 1–16. http://dx.doi.org/10.1155/2019/5723694.

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Coal fines migration exerts negative impacts on early water drainage of undersaturated coal seam gas (CSG) reservoirs. The complicated migration process results in ineffective and inaccurate forecast of coal fines production. Hence, a robust modelling tool is required to include the mechanisms of fines migration and to predict their impacts on rock and production. In this paper, fines migration in coal is categorized into three stages: generation, migration, and deposition processes. The corresponding models for different stages are established, including (1) a fines generation model, (2) the maximum fines-carrying concentration model and deviation factor of the modified Darcy model, (3) a fines deposition model, and (4) a dynamic permeability and porosity model. The above models are coupled with a water flow model, solved numerically using the finite difference method. Then, two dewatering strategies, including fast and moderate depressurization, are compared using the proposed models to study their effects on coal properties and following production. Finally, the production history of a CSG well in the Qinshui Basin, China, is utilized for history matching in a field case study. The simulation results indicate that new fines will be generated in a fast depressurization process and the water rate decline reduces the cleat permeability significantly. The newly generated fines can enhance the permeability temporarily, but they will block the flow channels and bring serious damage to the permeability when the water rate declines. The moderate depressurization strategy can produce the coal fines in a continuous mode, and the formation damage induced by fines deposition can be reduced to the acceptable level, which is the more reliable way to maintain well productivity. In addition, multiple well shut-in can trigger the irreversible fines deposition, reduce the permeability, and decrease the production rate.

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Padfield, A. M., P. J. Carey, C. D. Hills, and A. B. Poole. "Reuse of quarry fines in production of secondary aggregates." Proceedings of the Institution of Civil Engineers - Engineering Sustainability 157, no. 3 (September 2004): 149–54. http://dx.doi.org/10.1680/ensu.2004.157.3.149.

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Önal, Mehmet Ali Recai, Lopamudra Panda, Prasad Kopparthi, Veerendra Singh, Prakash Venkatesan, and Chenna Rao Borra. "Hydrometallurgical Production of Electrolytic Manganese Dioxide (EMD) from Furnace Fines." Minerals 11, no. 7 (July 1, 2021): 712. http://dx.doi.org/10.3390/min11070712.

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The ferromanganese (FeMn) alloy is produced through the smelting-reduction of manganese ores in submerged arc furnaces. This process generates large amounts of furnace dust that is environmentally problematic for storage. Due to its fineness and high volatile content, this furnace dust cannot be recirculated through the process, either. Conventional MnO2 production requires the pre-reduction of low-grade ores at around 900 °C to convert the manganese oxides present in the ore into their respective acid-soluble forms; however, the furnace dust is a partly reduced by-product. In this study, a hydrometallurgical route is proposed to valorize the waste dust for the production of battery-grade MnO2. By using dextrin, a cheap organic reductant, the direct and complete dissolution of the manganese in the furnace dust is possible without any need for high-temperature pre-reduction. The leachate is then purified through pH adjustment followed by direct electrowinning for electrolytic manganese dioxide (EMD) production. An overall manganese recovery rate of >90% is achieved.

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Ray, A., R. Sriravindrarajah, J. P. Guerbois, P. S. Thomas, S. Border, H. N. Ray, J. Haggman, and P. Joyce. "Evaluation ofwaste perlite fines in the production of construction materials." Journal of Thermal Analysis and Calorimetry 88, no. 1 (April 2007): 279–83. http://dx.doi.org/10.1007/s10973-006-8107-z.

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Vititnev, Aleksandr, Roman Marchenko, Venera Matygulina, Anastasiya Rubinskaya, and Anna Shishmareva. "Wood fibre recapture from process water during wet-forming of fiberboard: Process modelling with environmental and economic assessment." BioResources 18, no. 1 (January 3, 2023): 1330–46. http://dx.doi.org/10.15376/biores.18.1.1330-1346.

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This article presents the rationale for modelling the process of internal recapture of wood fibre from wastewater in fibreboard production using conventional refining methods and a new refiner disc design. New experimental studies to obtain mathematical dependencies for confirming the possibility of reusing cellulosic fines in comparing conventional and new refiner discs for fibreboard production are presented. Models reflecting the internal reuse of cellulosic fines from wastewater were developed. In this article, for comparative assessment of the efficiency of the proposed technologies, an environmental and economic assessment of cellulosic fines in modelling the process of its obtainment in fibreboard production was performed.

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Oyeneyin, Babs Mufutau, Said Mufarji, and Donald Igwegbu. "Innovative Solutions to Fines Management in High Permeability Sands." Advanced Materials Research 18-19 (June 2007): 287–92. http://dx.doi.org/10.4028/www.scientific.net/amr.18-19.287.

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Formation impairment due to fines migration during drilling and production continues to cause injectivity or inflow reduction. In high permeability sandstone formations or sandpacks, fines migration pose major concerns in the oil industry as it leads to reduction in oil/gas production. The problem is further enhanced in mature reservoirs where increased water ingress and multiphase production aggravate the fines mobilisation and migration. Proper fines management can optimise productivity, safeguard facilities and reduce well maintenance cost. Today’s core flood tests as part of risk assessment limit tests to single phase or at best two-phase oil/water flow. This paper presents the unique technique adopted to analyse fines migration mechanisms in a true multiphase environment. The technique integrates CFD and 3-D reservoir simulation concepts to define and quantify the effects of different operating conditions on discretised reservoir blocks. From the results obtained detailed mapping of prevailing pore blocking mechanisms and corresponding impairment profiles are presented as functions of operating conditions and completion strategies. The paper introduces a parallel experimental programme being initiated at The Robert Gordon University(RGU) to validate the simulation predictions. The paper is concluded with suggestions (supported by flow efficiency case studies) on contemporary innovations in fines management ranging from a radical use of expandable screens (ESSTM) or expandable slotted liners (ESLTM) or the intelligent VSSTM Screen to specialist application of glass or ceramic beads for pore diameter control and near wellbore reinforcement to initiate secondary filtration

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Delatorre, Fabíola Martins, Gabriela Fontes Mayrinck Cupertino, Michel Picanço Oliveira, Felipe da Silva Gomes, Luciene Paula Roberto Profeti, Demetrius Profeti, Mário Guimarães Júnior, Márcia Giardinieri de Azevedo, Daniel Saloni, and Ananias Francisco Dias Júnior. "A Novel Approach to Charcoal Fine Waste: Sustainable Use as Filling of Polymeric Matrices." Polymers 14, no. 24 (December 16, 2022): 5525. http://dx.doi.org/10.3390/polym14245525.

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Most composites produced come from fossil fuel sources. Renewable strategies are needed for the production of composites. Charcoal fines are considered waste and an alternative for the production of biocomposites. The charcoal fines resulting from the pyrolysis of any biomass are an efficient alternative for the production of green composites. Studies to understand how the pyrolysis parameters influence the properties of this material for the production of biocomposites are necessary. Charcoal has a high carbon content and surface area, depending on final production temperatures. This study aims to evaluate charcoal fines as potential reinforcing agents in biocomposites. This study investigated for the first time charcoal fines from three pyrolysis temperatures (400, 600, and 800 °C) to identify the most suitable charcoal for use as a raw material in the production of carbon biocomposites with 30% by weight incorporated into a polyester matrix composite. Apparent density, porosity, morphology, and immediate chemical composition and Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) of charcoal fines were evaluated. The charcoal fines produced at 800 °C showed interesting potential as polymeric matrix fillers due to their higher porosity (81.08%), fixed carbon content (96.77%), and hydrophobicity. The biocomposites were analyzed for flexural and tensile strength and scanning electron microscopy. The results revealed an improvement in resistance at elevated temperatures, especially at 800 °C, with higher breaking strength (84.11 MPa), modulus of elasticity (4064.70 MPa), and traction (23.53 MPa). Scanning electron microscopy revealed an improvement in morphology, with a decrease in roughness at 800 °C, which caused greater adhesion to the polyester matrix. These results revealed a promising new biocomposite compared to other natural lignocellulosic polymeric composites (NLFs) in engineering applications.

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Zhang, Aoxiang, Daiyong Cao, Yingchun Wei, and Thomas E. Rufford. "Characterization of fines produced during drainage of coalbed methane reservoirs in the Linfen block, Ordos Basin." Energy Exploration & Exploitation 38, no. 5 (July 6, 2020): 1664–79. http://dx.doi.org/10.1177/0144598720935528.

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Coal fines produced during drainage of coalbed methane reservoirs can affect the permeability of the coal reservoir and damage production facilities such as downhole pumps, shafts, and valves. Thus, to clarify the mechanism of coal fines output is very important to high production of coalbed methane. The characteristics of coal fines can be used to identify the sources of the coal fines and to develop reasonable means of controlling coal fines output. In this study, different coal fines characteristics were investigated to reveal the output mechanism of coal fines. The coal fines samples were collected from 16 coalbed methane wells, which located in Eastern Ordos Basin of China. And the wells are in different drainage stages. The coal fines samples were analyzed by using transmission light microscopy, reflection polarized optical microscopy, laser particle size analysis, X-ray diffraction, and scanning electron microscopy with energy dispersive X. The results show that the concentration of coal fines is in the range of 3–8% (volume percent). The sizes of the coal fine particles tended to be below 200 µm. The main components of pulverized coal are vitrinite and inorganic minerals and the average content of inorganic minerals account for 50.56% and the standard deviation is 0.0685. The morphology analysis results show that the shape of coal fines is different in different parts of the coalbed methane wells. The coal fines concentration increases with the increase in the thickness of the deformed coal, and decreases with the increase in the burial depth. The concentration of coal fines becomes higher with the increase of casing pressure and coal fines concentration increases with the increase of the variation of bottom hole pressure.

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Han, Wenlong, Yanbin Wang, Jingjing Fan, Yong Li, Xiang Wu, and Yun Yu. "An Experimental Study on Coal Fines Migration during Single Phase Water Flow." Geofluids 2020 (August 14, 2020): 1–13. http://dx.doi.org/10.1155/2020/3974790.

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Coal fines migration and intrusion in coal fractures affect coalbed methane (CBM) wells performance by reducing reservoir permeability and production continuity. Physical simulations are conducted to investigate the permeability variation under different diameter coal fines intrusion at various flow velocities and confining pressures. The results show that the conductivity of fractures is dramatically reduced and hardly recover to its initial condition after coal fines intrusion. The permeability after coal fines intrusion (Pcfi) has no direct correlation with the increase of flooding velocity, while decreases with the increase of confining pressures. The fractures can be totally blocked by coal fines, while penetration also happened during the flooding process, causing permeability fluctuation. The permeability loss rates value for 80-120 mesh coal fines intrusion are generally <60% compared with the initial permeability, including the flow velocity of 2, 3, 4, 6, 8, and 10 mL/min with confining pressure of 6 MPa and the confining pressure of 2, 3, 4, 5, and 6 MPa with flow velocity of 3 mL/min. However, under 120+ mesh coal fines condition, the permeability loss rates are higher than 85% under most flow velocities and confining pressures. When coal fines become smaller, the permeability loss rates decrease to be lower than 45%, and part the coal fines are discharged with the water flow. Thus, coal fines proper dischargement can partly maintain the reservoir permeability during coalbed methane production. The results would be useful in understanding coal fines intrusion behaviors and its controlling strategies during CBM drainage.

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Kang, Hyun, Jong Myoung Won, and Byoung-Uk Cho. "Effects of Production Variables of Fines-PCC Composite Fillers on Paper Properties (II): Added Amounts and Type of Fines." Journal of Korea Technical Association of the Pulp and Paper Industry 51, no. 6 (December 31, 2019): 167–74. http://dx.doi.org/10.7584/jktappi.2019.12.51.6.167.

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Chequer, L., C. Nguyen, G. Loi, A. Zeinijahromi, and P. Bedrikovetsky. "Fines migration in aquifers: Production history treatment and well behaviour prediction." Journal of Hydrology 602 (November 2021): 126660. http://dx.doi.org/10.1016/j.jhydrol.2021.126660.

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Zhai, Xinle, and Kamelia Atefi-Monfared. "Production versus injection induced poroelasticity in porous media incorporating fines migration." Journal of Petroleum Science and Engineering 205 (October 2021): 108953. http://dx.doi.org/10.1016/j.petrol.2021.108953.

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Carpenter, Chris. "Modeling of Production Decline Caused by Fines Migration in Deepwater Reservoirs." Journal of Petroleum Technology 70, no. 02 (February 1, 2018): 75–77. http://dx.doi.org/10.2118/0218-0075-jpt.

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Zeinijahromi, Abbas, Alexandre Vaz, Pavel Bedrikovetsky, and Sara Borazjani. "EFFECTS OF FINES MIGRATION ON WELL PRODUCTIVITY DURING STEADY STATE PRODUCTION." Journal of Porous Media 15, no. 7 (2012): 665–79. http://dx.doi.org/10.1615/jpormedia.v15.i7.50.

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Shi, Caijun. "Characteristics and cementitious properties of ladle slag fines from steel production." Cement and Concrete Research 32, no. 3 (March 2002): 459–62. http://dx.doi.org/10.1016/s0008-8846(01)00707-4.

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Popplewell, L. M., and M. Peleg. "An ‘erosion index’ to characterize fines production in size reduction processes." Powder Technology 58, no. 2 (June 1989): 145–48. http://dx.doi.org/10.1016/0032-5910(89)80027-0.

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Keeble, James Eduard. "PROMOTING INVESTMENT AND DEVELOPING PRODUCTION IN ECUADOR." Revista Internacional Jurídica y Empresarial, no. 2 (February 27, 2019): 151–56. http://dx.doi.org/10.32466/eufv-r.i.j.e.2019.2.512.151-156.

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This legislative review presents a summary of the Ley Orgánica para el Fomento Productivo, Atracción de Inversiones, Generación de Empleo y Estabilidad y Equilibrio Fiscal (the “Law to Foster Production”) published in “Registro Oficial Suplemento” No. 309 of August 21, 2018 that provides certain tax and other incentives. The rationale behind the law is to amend the legal framework to foster an increase production, attract foreign direct investment and stimulate job creation.Among the benefits introduced by the Law to Foster Production, is the remission of 100% interest, fines and other charges stemming from overdue obligations to IRS, Social Security, customs, basic utilities by State-owned enterprises and other State entities. There is a 90-day term given to all debtors to pay principal from the overdue obligations and be exempt from interest, fines and other surcharges. In some cases, the debtor may request to pay principal in installments (up to three years).

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Schembre, J. M., and A. R. Kovscek. "Mechanism of Formation Damage at Elevated Temperature." Journal of Energy Resources Technology 127, no. 3 (March 16, 2005): 171–80. http://dx.doi.org/10.1115/1.1924398.

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The pore and grain surface of reservoir rocks often has clay and other fine material attached onto pore walls. It has been long recognized that brine salinity and pH are key factors affecting the attractive forces between pore surfaces and fines. If mobilized particles are assembled in sufficient quantities, they obstruct pore throats and reduce the permeability of the formation. There is anecdotal evidence of substantial fines migration during steam injection enhanced oil recovery operations. As of yet, the mechanism of fines release with temperature is unexplained. The Derjaguin, Landau, Verwey, and Overbeek theory of colloidal stability is used in conjunction with laboratory, core-scale experiments to demonstrate that high temperature, alkaline pH, and low salinity (typical characteristics of steam condensate) are sufficient to induce fines mobilization. Temperature is a key variable in calculations of fines stability. Hot-water floods are performed in Berea sandstone at temperatures ranging from 20°C to 200°C. Permeability reduction is observed with temperature increase and fines mobilization occurs repeatably at a particular temperature that varies with solution pH and ionic strength. A scanning electron microscope is used to analyze composition of the effluent samples collected during experiments. It confirms the production of fine clay material. On the practical side, this study provides design criteria for steam injection operations so as to control fines production.

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Fullington, Barney G., Jim K. Park, and Byung J. Kim. "Waste minimization and nitrocellulose fines removal at an ammunition plant." Water Science and Technology 34, no. 10 (November 1, 1996): 121–26. http://dx.doi.org/10.2166/wst.1996.0247.

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The Radford Army Ammunition Plant (RAAP) produces nitrocellulose (NC) as a major ingredient in tank and artillery ammunition propellant. Through the process of NC production, wastewater is generated which contains large quantities of NC in the micron and sub-micron size range. These suspended and colloidal particles are collectively called NC fines. Under the impetus of a proposed Ammunition Procurement and Supply Agency suspended solids effluent limit of 25 mg/l and a greater emphasis on pollution prevention, significant research has been conducted into the areas of waste minimization and NC fine removal at the RAAP. One aspect of the current research involved a field study at the RAAP. The purpose of the field study was to inspect and discuss the entire NC production process with the operators, foremen, and NC production supervisor. With the information collected at the RAAP, it was possible to propose several waste minimization schemes and NC fines removal alternatives. From existing data, it was calculated that the proposed pollution prevention ideas could save the RAAP approximately $1,500,000 annually.

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Sandquist, David, Armin Thumm, and Alan R. Dickson. "The influence of fines material on the mechanical performance of wood fiber polypropylene composites." BioResources 15, no. 1 (November 26, 2019): 457–68. http://dx.doi.org/10.15376/biores.15.1.457-468.

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With an increasing interest in a wider scope of biomass feedstocks for biocomposite production, the potential influence of a possibly higher proportion of fines material needs to be addressed. In the pulp and paper industry, at least two major classes of fines material are identified; blocky fines and fibrillar fines. These differ in their aspect ratio, with the later having substantially higher aspect ratio. In this study, the physical impact of blocky fines (from CTMP refining) and fibrillar fines (produced via Super® Masscolloider refining) on a wet formed compression molded polypropylene (PP) matrix biocomposites were compared. The results indicated that in wet formed compression molded polymer matrix composites, both blocky (CTMP) and fibrillar (SMC) fines have a significant negative impact on modulus of rupture (MoR). Additionally, blocky CTMP fines also have a significant negative impact on modulus of elasticity (MoE). It is postulated that this is due to fibril agglomeration, in the case of fibrillar fines, and low aspect ratio in combination with some agglomeration, in the case of blocky CTMP fines. The indication is that fines material that has not been treated to minimize agglomeration has limited benefits as a reinforcing agent, and only a negative impact on most properties in wet formed compression molded polymer matrix composites.

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Mosse, Laurent, Stephen Pell, and Thomas J. Neville. "Identification of Breakout Behind Casing: Methodology to Obtain Openhole-Equivalent Caliper Measurements Through Slotted Liner Using the Density Tool." Petrophysics – The SPWLA Journal of Formation Evaluation and Reservoir Description 62, no. 6 (December 1, 2021): 651–69. http://dx.doi.org/10.30632/pjv62n6-2020a5.

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Growth in the coal seam gas industry in Queensland, Australia, has been rapid over the past 15 years, with greater than USD 70 billion invested in three liquified natural gas export projects supplied by produced coal seam gas. Annual production is of the order of 40 Bscm or 1,500 PJ, with approximately 80% of this coming from the Jurassic Walloon Coal Measures of the Surat Basin and 20% from the Permian Coal Measures of the Bowen Basin. The Walloon Coal Measures are characterized by multiple thin coal seams making up approximately 10% of the total thickness of the unit. A typical well intersects 10 to 20 m of net coal over a 200- to 300-m interval, interbedded with lithic-rich sandstones, siltstones, and carbonaceous mudstones. The presence of such a significant section of lithic interburden within the primary production section has led to a somewhat unusual completion strategy. To maximize connection to the gas-bearing coals, uncemented slotted liners are used; however, this leaves fluid-sensitive interburden exposed to drilling, completion, and produced formation fluids over the life of a well. External swellable packers and blank joints are therefore used to isolate larger intervals of interburden and hence minimize fines production. Despite these efforts, significant fines production still occurs, which leads to the failure of artificial lift systems and the need for expensive workovers or lost wells. Fines production has major economic implications, with anecdotal reports suggesting up to 40% of progressive cavity pump artificial lift systems in Walloon Coal Measures producers may be down at any one time. The first step in solving this problem is to identify the extent and distribution of fines production. The wellbore completion strategy above, however, precludes the use of mechanical calipers to identify fines-production-related wellbore enlargement. A new caliper-behind-liner technique has therefore been developed using a multiple-detector density tool. Data from the shorter-spacing detectors are used to characterize the properties of the liner as well as the density of the annular material. This is particularly important to evaluate as the annulus fill varies between gas, formation water, drilling and completion fluids, and accumulated fines. The longer-spacing detector measurements are then used in conjunction with pre-existing openhole formation density measurements to determine the thickness of the annulus, and hence hole size, compensating for liner and annulus properties.

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GARD TIMMERFORS, JESSICA, and LEIF J. JÖNSSON. "Evaluation of novel drum chipper technology: pilot-scale production of short wood chips." TAPPI Journal 18, no. 10 (November 1, 2019): 585–92. http://dx.doi.org/10.32964/tj18.10.585.

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Impregnation of wood chips with acidic pulping liquors is improved when using short chip lengths. If the average wood chip length is too short, conventional chipping technology will generate excess small material, such as pin chips and fines. The possibility of using newly developed drum chipping technology to produce shortlength wood chips was evaluated with a pilot drum chipper operating at different drum velocities and in-feed angles. With a drum velocity of 30 m/s, the average wood chip lengths and the combined fractions of pin chips and fines were 24 mm and 3.3%, 22 mm and 4.2%, and 17 mm and 8.5%. The highest fractions of total accept chips (large and small accepts), 89% to 90% without screening, were observed for drum velocities of 30–34 m/s and average wood chips lengths of 21–22 mm. The results indicate the potential of drum chipping technology for producing short wood chips with relatively high fractions of accept chips and tolerable fractions of pin chips and fines.

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Bernard, Julien, and Jean-Luc Le Pennec. "The milling factory: Componentry-dependent fragmentation and fines production in pyroclastic flows." Geology 44, no. 11 (September 23, 2016): 907–10. http://dx.doi.org/10.1130/g38198.1.

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Zhang, Pan, Jihai Duan, Guanghui Chen, Jianlong Li, and Weiwen Wang. "Production of polycrystalline silicon from silane pyrolysis: A review of fines formation." Solar Energy 175 (November 2018): 44–53. http://dx.doi.org/10.1016/j.solener.2017.12.031.

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O'Brien, Tara A., Allen V. Barker, and Joanna Campe. "Container production of tomato with food by‐product compost and mineral fines." Journal of Plant Nutrition 22, no. 3 (January 1999): 445–57. http://dx.doi.org/10.1080/01904169909365642.

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Han, Guoqing, Kegang Ling, Huaxiao Wu, Fei Gao, Feng Zhu, and Ming Zhang. "An experimental study of coal-fines migration in Coalbed-methane production wells." Journal of Natural Gas Science and Engineering 26 (September 2015): 1542–48. http://dx.doi.org/10.1016/j.jngse.2015.06.012.

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Cengizler, H., and M. Kemal. "Formcoke production from char fines of hard brown coals by air curing." Mineral Processing and Extractive Metallurgy 115, no. 3 (September 2006): 132–38. http://dx.doi.org/10.1179/174328506x109022.

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Mendonça de Araujo, José Antonio, Maria das Mercês Reis de Castro, and Vanessa de Freitas Cunha Lins. "Reuse of furnace fines of ferro alloy in the electrolytic manganese production." Hydrometallurgy 84, no. 3-4 (November 2006): 204–10. http://dx.doi.org/10.1016/j.hydromet.2006.05.011.

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Guo, Zhenghuai, Furqan Hussain, and Yildiray Cinar. "Permeability variation associated with fines production from anthracite coal during water injection." International Journal of Coal Geology 147-148 (August 2015): 46–57. http://dx.doi.org/10.1016/j.coal.2015.06.008.

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Carmignano, Ottavio Raul Domenico Riberti, and Cornélio de Freitas Carvalho. "Comparison between bentonite and serpentinite in the production process of iron ore pellets." Rem: Revista Escola de Minas 67, no. 1 (March 2014): 47–53. http://dx.doi.org/10.1590/s0370-44672014000100007.

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Pelletizing iron ore fines is an agglomeration process that through a thermal treatment converts the ultra-fines fraction thereof into small balls ranging in size from 8mm (0.31 in.) to 18mm (0.71 in.), with adequate characteristics for feeding steel reduction works. The binder more used to make pellets is bentonite, which is an item of significant cost in the process. The present paper aims at evaluating the use of serpentinite instead of bentonite. The results obtained show that the full substitution of bentonite for serpentinite is unfeasible. However a potential does exist for using serpentinite and bentonite together in the iron ore palletizing process in the proportion of 1:1.

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Cepuritis, Rolands, Stefan Jacobsen, and Tero Onnela. "Sand production with VSI crushing and air classification: Optimising fines grading for concrete production with micro-proportioning." Minerals Engineering 78 (July 2015): 1–14. http://dx.doi.org/10.1016/j.mineng.2015.03.025.

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Cai, Ji Wei, Zheng Hang Lü, Guang Liang Gao, and Ji Xu Wu. "Effects of Micro Fines Content on Performances of Mortar Prepared with Mill Tailings from Magnetite." Advanced Materials Research 287-290 (July 2011): 729–32. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.729.

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In production of manufactured fine aggregate (MFA) from magnetite mill tailings (MT), the micro fines (particles smaller than 75 microns) was strictly eliminated. This results in lower utilization of the resources and worse micro grading of MFA. The mortar samples were prepared with MT at various micro fines contents to investigate the effects on their fluidities and strengths. In optimal water-to-powder ratio (w/p, all powders included), the fluidities of mortars reached maximum and the strengths of mortars could be improved at suitable content of micro fines in MFA. The application proves that MT can be used as MFA to prepare construction mortars up to standard and micro fines can be substituted for mineral admixture to prepare composite mortars for improving workability. So more MT can be utilized and micro fines in the tailings can take effect.

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Anikin, A. E., G. V. Galevskii, and V. V. Rudneva. "Technological modes of efficient metallization of iron-oxide-containing waste from metallurgical production." Izvestiya. Ferrous Metallurgy 63, no. 5 (July 1, 2020): 335–43. http://dx.doi.org/10.17073/0368-0797-2020-5-335-343.

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During the research, rolled scale and gas cleaning slimes from oxygen-converter workshop No. 1 of JSC “EVRAZ ZSMK” were used as iron-oxide-containing materials. Semi-coke from brown coals of the Berezovskoye deposit of the Kansko-Achinsk basin (temperature of semi-coking is 750 °C), coke fines of PJSC “Coke” and dust from coke dry-quenching plant of JSC “EVRAZ ZSMK” were used as carbon reducing agents. Total iron, FeO and Fe2 O 3 oxides amount to 73.3, 75.5 and 20.9 % in scale, 41.2, 4.7 and 53.7 % in sludge, respectively. Sludge also contains 4.3 % of total carbon and 20.6 % of CaO. Brown-coal semi-coke, coke fines and coke dust contains carbon and volatiles 94.05 and 9.5 %, 97.50 and 2.1 %, 97.47 and 1.6 % on dry ashless weight, respectively. For metallization of furnace charges with composition: scale, slime–semi-coke, coke fines, dust with addition of 10 % water-soluble binding–molasses, strong unroasted briquettes were pressed. Metallization modes of analyzed charge compositions were thermodynamically predicted and technologically determined. Metallization degree and metal iron content at usage of brown-coal semi-coke were found to be 97.5 and 90.2 % for scale, 97.5 and 71.3 % for sludge; of coke fines: 70.7 and 61.9 % for scale, 68.9 and 48.4 % for sludge; of coke dust: 72.1 and 62.6 % for scale, 69.2 and 48.2 % for sludge. The possibility of achievement the metallization degree of 97.0 – 98.0 % was established for briquetted charge from scale – brown-coal semi-coke with 92.0 – 93.0 % of total iron, 89.8 – 90.6 % of metallic iron, 2.8 – 3.2 % of FeO, 0.06 – 0.08 % of S, 0.016 – 0.018 % of P, 1.7 – 1.9 % of C, 1.0 – 1.2 % of CaO and 0.25 – 0.35 % of MgO at 1173 K and duration of 40 min.

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Anyanwu, Uche C., and Gbenga F. Oluyemi. "Effect of Produced Sand Particles and Fines on Scale Inhibitor: A Review." Colloids and Interfaces 5, no. 3 (June 23, 2021): 35. http://dx.doi.org/10.3390/colloids5030035.

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Application of scale inhibitors in oil and gas production is aimed at mitigating scale blockage during production. Many experimental, mathematical, and numerical simulation modeling works have been carried out to evaluate behavior, performance, and interaction of the scale inhibitor chemicals within porous media in relation to their efficiency in solving scale problem. However, the mechanisms underpinning scale inhibitors performance are not well published. Some research works have shown theoretically that not all scale inhibitors pumped into the formation adsorb onto the formation rock. Some of the inhibitors may adsorb on produced loose sand grains or colloidal fine sand particles which float and flow within the pore spaces along with the scale inhibitor mostly in unconsolidated reservoirs This paper provides a review of research work on the effect of produced loose sand or colloidal fine particles flow on polyphosphonates and polyphosphinopolymer scale inhibitors performances during crude production.

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Carpenter, Chris. "Single-Step Acidizing Technique Treats Severe Fines Damage." Journal of Petroleum Technology 74, no. 06 (June 1, 2022): 67–69. http://dx.doi.org/10.2118/0622-0067-jpt.

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This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 208806, “New Single-Step Acidizing Technique Treats Severe Fines Damage Over a Wide Range of Temperatures and Mineralogies,” by Lanne R. Houchin, SPE, Dorian Granizo, and Joseph Conine, SPE, PIC Chemicals. The paper has not been peer reviewed. The complete paper focuses on identifying a hydrofluoric-acid (HF) -derivative treatment that could be used as a single-step sandstone acid treatment not requiring acid-flowback services. Five commercially available buffered, retarded, and HF-derivative acid chemistries were tested to determine the risks of facility upsets. A new fluoroboric acid (HBF4) chemistry was developed that has all the benefits of HBF4, is compatible with most sensitive minerals, and does not cause facility upsets. Introduction The wells in this study predominantly target production intervals that were initially bypassed or beyond the reach of the original field development plan. Only HF-treatment compositions can remove the predominantly siliceous components found in sandstone reservoirs. The necessity of adjusting HF systems to accommodate sensitive mineralogies has been thoroughly documented. Recently, it is rare to use cores to identify potentially acid-sensitive mineralogy that may be present throughout the reservoir. Conventional HF treatments require a hydrochloric acid (HCl) preflush. However, when HCl combines with iron, the resultant ferric and ferrous chloride combine with even small amounts of asphaltenes in the crude to form tenacious rigid film emulsions and solvent-insoluble sludge. Five commercially available retarded or buffered HF systems were tested. The published work on these potential single-step chemistries showed the ability of these systems to be safe, capable of damage removal within the rock matrix, and compatible with various mineralogies to reduce the production of harmful precipitates. However, whether these improved chemistries would reduce the occurrence of surface-facility upsets had not been evaluated. Acid-flowback services typically cost between $75,000 and $250,000. This added cost would be prohibitive for over 70% of the near-end-of-life wells treated in this field study. Selecting a single-step acidizing chemical composition that eliminates the risk of formation of acid-reaction products that both plug the formation and cause potentially catastrophic facility upsets was the objective of this study.

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Alipraja, Irsan, Roger E. Hernández, Claudia B. Cáceres, and Ahmed Koubaa. "Towards strand production in primary log breakdown: Effects of the counter-knife and temperature on size distribution of Jack pine strands." BioResources 17, no. 2 (March 22, 2022): 2632–51. http://dx.doi.org/10.15376/biores.17.2.2632-2651.

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Effects of counter-knife and wood temperature were studied relative to the size distribution of Jack pine strands processed by a strander-canter. Studied factors included the counter-knife angle (60°, 75°, 90°, and 105°) and the distance between the edges of the counter-knife and knife (6 mm, 11 mm, and 16 mm). The nominal cutting speed was fixed at 25 m/s. Rotation and feed speeds were adjusted to obtain a target strand length of 102 mm, while the target strand thickness was 0.9 mm. The stranding process was performed under two log temperatures, i.e., -13.4 °C (frozen condition) and 18.6 °C (unfrozen condition). Results showed that the proportion of strands, fines, pin chips, and strands’ width were affected by the counter-knife angle and wood temperature. The proportion of strands and the mean strand width increased as the counter-knife angle decreased, while conversely, the proportion of fines and pin chips decreased. Frozen logs produced narrower strands and more fines and pin chips than unfrozen logs. The highest strand proportion, lowest fines and pin chips proportions, and wider strands were obtained with a counter-knife angle of 60° for frozen wood and 75° for unfrozen wood.

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Filtvedt, Werner O., Trygve Mongstad, Arve Holt, Morten Melaaen, and Hallgeir Klette. "Production of Silicon from SiH4 in a Fluidized Bed, Operation and Results." International Journal of Chemical Reactor Engineering 11, no. 1 (June 18, 2013): 57–68. http://dx.doi.org/10.1515/ijcre-2012-0027.

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Abstract: For an installed silicon-based solar cell panel, about 40% of the energy needed for fabrication is consumed for production of the silicon feedstock. Reducing the energy consumption in this step is therefore crucial in order to minimize the energy payback time and cost of the technology. The most promising alternative to the conventional methods is to use fluidized bed reactors. In this article, we report the results from a novel reactor layout with a selectively cooled distribution arrangement. Important aspects of fludized bed monitoring and operation are described. Two different operation regimes are stated yielding hence porous and dense growth. Further, the method of encapsulating fines by means of more dense depositions is verified, and the nature of the scavenged material is characterized. Also, two different types of fines formation are identified and accounted for.

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Kargupta, Wriju, Christine Browne, Luis Verdugo, Ian Hunt, Karen Stack, Warren Batchelor, and Joanne Tanner. "Flotation as a separation technology for recovering pulp fines and sustainable nanocellulose production." Separation and Purification Technology 270 (September 2021): 118810. http://dx.doi.org/10.1016/j.seppur.2021.118810.

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Gutsche, O., and D. W. Fuerstenau. "Fracture kinetics of particle bed comminution — ramifications for fines production and mill optimization." Powder Technology 105, no. 1-3 (November 1999): 113–18. http://dx.doi.org/10.1016/s0032-5910(99)00125-4.

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Jayasankar, K., P. K. Ray, A. K. Chaubey, A. Padhi, B. K. Satapathy, and P. S. Mukherjee. "Production of pig iron from red mud waste fines using thermal plasma technology." International Journal of Minerals, Metallurgy, and Materials 19, no. 8 (August 2012): 679–84. http://dx.doi.org/10.1007/s12613-012-0613-3.

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Bedrikovetsky, P., A. Vaz, F. Machado, A. Zeinijahromi, and S. Borazjani. "Skin Due to Fines Mobilization, Migration, and Straining During Steady-State Oil Production." Petroleum Science and Technology 30, no. 15 (June 13, 2012): 1539–47. http://dx.doi.org/10.1080/10916466.2011.653702.

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Chu, L. M., and A. D. Bradshaw. "THE USE OF PULVERIZED REFUSE FINES (PRF) IN ARBORICULTURE. I. NURSERY TREE PRODUCTION." Arboricultural Journal 15, no. 1 (February 1991): 49–63. http://dx.doi.org/10.1080/03071375.1991.9746870.

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Chen, Ying-Liang, Juu-En Chang, Yi-Chieh Lai, Ming-Sheng Ko, and Yi-Hsin Chen. "Recycling of steel slag fines for the production of autoclaved aerated concrete (AAC)." ce/papers 2, no. 4 (September 2018): 445–49. http://dx.doi.org/10.1002/cepa.849.

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Vieira, André Tarcizo de Oliveira, Alexandre Miguel do Nascimento, Azarias Machado de Andrade, and Ananias Francisco Dias Júnior. "PHYSICAL-MECHANICAL PROPERTIES OF BRIQUETTES PRODUCED FROM CHARCOAL FINES AND WASTE OF Pinus spp." FLORESTA 48, no. 4 (October 2, 2018): 513. http://dx.doi.org/10.5380/rf.v48i4.55028.

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The objective of this research was to evaluate the physical and mechanical properties of briquettes produced with charcoal fines and waste of Pinus spp (sawdust and wood shavings). For the production, the charcoal fines of two particle sizes (less than and greater than 5 mm) were mixed with each type of wood waste of Pinus spp in the proportions of 5, 10, 15, and 20%. Then, the mixtures were compacted under the pressure of 55 kgf.cm-2 in a piston briquetter. As binder, 8% gelatinized maize starch was used. Tests were carried out on the briquettes in order to determine the apparent density, compressive strength, and friability index. Briquettes with the highest densities and compressive strengths were produced with the two lowest proportions of wood waste of Pinus spp (5 and 10%). The use of the charcoal fines combined with sawdust or wood shavings of Pinus spp is recommended for the production of briquettes with good physical and mechanical properties.

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Fowler, A. C., and Bettina Scheu. "A theoretical explanation of grain size distributions in explosive rock fragmentation." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 472, no. 2190 (June 2016): 20150843. http://dx.doi.org/10.1098/rspa.2015.0843.

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We have measured grain size distributions of the results of laboratory decompression explosions of volcanic rock. The resulting distributions can be approximately represented by gamma distributions of weight per cent as a function of ϕ = − log 2 ⁡ d , where d is the grain size in millimetres measured by sieving, with a superimposed long tail associated with the production of fines. We provide a description of the observations based on sequential fragmentation theory, which we develop for the particular case of ‘self-similar’ fragmentation kernels, and we show that the corresponding evolution equation for the distribution can be explicitly solved, yielding the long-time lognormal distribution associated with Kolmogorov's fragmentation theory. Particular features of the experimental data, notably time evolution, advection, truncation and fines production, are described and predicted within the constraints of a generalized, ‘reductive’ fragmentation model, and it is shown that the gamma distribution of coarse particles is a natural consequence of an assumed uniform fragmentation kernel. We further show that an explicit model for fines production during fracturing can lead to a second gamma distribution, and that the sum of the two provides a good fit to the observed data.

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Journal articles on the topic 'Fines production'

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