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Journal articles on the topic 'Separatore centrifugo'

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Author: Grafiati

Published: 10 March 2023

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1

Chen, Xiao Chen, Jing Guang Liu, and Guo Hong Xie. "The Development of Hydraulic Water Separator Used in Construction." Advanced Materials Research 433-440 (January 2012): 1391–96. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.1391.

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Hydraulic water separator can realize the automatic control function by the use of pump-control speed electro-hydraulic servo control system. It can keep the centrifuge adapting to the changes of the water parameters fully with the real-time date collection of centrifugal speed according to different parameters including the density, viscosity, solid-phase content and particle size. It can achieve the best effect by the assurance that the centrifuge is always in the best condition.

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2

Sawicki, Jerzy M. "Transversal Pressure Effect in Circulative Separators." Archives of Hydro-Engineering and Environmental Mechanics 59, no. 1-2 (October 1, 2012): 3–12. http://dx.doi.org/10.2478/v10203-012-0001-5.

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Abstract Progressive urban development of the human environment requires new methods of rain water treatment. Recently, there has been a growing interest in the improvement of gravitational suspension separation, and especially in the application of the centrifugal force. This important factor can be induced in two ways; by the circulation of the reservoir containing the fluid (centrifugal separators), or by a tangent supply of this reservoir (circulative separators). In addition to the centrifugal force, another essential transversal force is at work in this case, resulting from the local variability of the pressure. In the literature, this force is derived for centrifuge conditions, but applied also to circulative separators, which is questionable, as in the latter devices velocity and pressure fields are clearly different. The paper is devoted to the determination of the transversal pressure effect in circulative separators. First, a model of tangent and radial velocity profiles is introduced. The radial pressure distribution, calculated on this basis and verified experimentally, leads to the final result, that is, a technical formula describing the force in question

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3

Lowrey, I., and G. Smith. "Elevated results in a vitamin B12 assay when using serum separator blood collection tubes." Annals of Clinical Biochemistry: International Journal of Laboratory Medicine 40, no. 5 (September 1, 2003): 560–62. http://dx.doi.org/10.1258/000456303322326498.

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Background: In the light of apparently spurious serum vitamin B12 results in some patients, the effect of serum separator sample tubes on serum vitamin B12 values, assayed by the Bayer Centaur analyser, was examined. Method: Results of parallel assays of serum vitamin B12 in plain (non-gel) serum tubes and serum separator gel tubes were compared. Serum in previously centrifuged gel tubes was mixed in the tube and the effect of that mixing on assay results quantitated. A limited investigation of the effect of tube cap type was also carried out. Results: Serum vitamin B12 concentration was 54% higher in samples taken into serum separator tubes after re-mixing the serum in the original tube. This effect could be abolished by re-centrifugation. Conclusions: Use of serum separator tubes may be associated with spuriously elevated serum vitamin B12 concentrations in the Bayer Centaur assay. Laboratories receiving samples for vitamin B12 assay in serum separator tubes that have already been centrifuged should either re-centrifuge the tubes, or aliquot and re-centrifuge serum from the tubes prior to vitamin B12 assay.

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4

Yang, Yan, and Zi Li Li. "Double Inlet Cyclone Separators for Natural Gas Dehydration." Applied Mechanics and Materials 44-47 (December 2010): 1002–6. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.1002.

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The fluid flow in the double cyclone separator is numerical simulated, using the Navier-Stokes equations with the Reynolds stress model (RSM). The basic parameters of gas flow are obtained as functions of radius such as the tangential velocity, the axial velocity and the static pressure. The numerical results show that in the cyclones water liquids are centrifuged onto the walls and removed from the natural gas due to the strong centrifugal field, while the natural gas stays in the central region and moves out from the up-outlet. The water can be well removed from the natural gas.

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5

Rza Behbudov, Shahin Ismayilov, Rza Behbudov, Shahin Ismayilov. "DETERMINATION OF THE INSIDE DIAMETER AND CAPACITY OF A VERTICAL GRAVITY SEPARATOR." PAHTEI-Procedings of Azerbaijan High Technical Educational Institutions 17, no. 06 (May 18, 2022): 175–79. http://dx.doi.org/10.36962/pahtei17062022-175.

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The article provides a brief analysis of the internal diameter and capacity of a vertical gravity separator. The process of separation should be understood as the process of separating the solid, liquid and vapor phases in a stream. Devices in which liquid and solid phases are separated from gas are called separators. Separators used in gas condensate mines are divided into classes according to their different qualities. Separators are divided into the following types (classes) according to their purpose: a) working separators; b) measuring separators. Separators are cylindrical and spherical according to their geometric shapes. Separators are vertical, horizontal and inclined depending on their position in space. Due to the phase separation, the separators are of mechanical, liquid and electric type. Mechanically operated separators that separate phase separations according to their strength are divided into gravitational, centrifugal and filter-sensitive (separating). Keywords: vertical, gravitational, separation, steam, measuring separators, horizontal

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6

Mori, Hiroshi, Leonard Borgstrom, and Richard Kelly. "Innovation in Centrifuge Separator Development." JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN 35, no. 2 (2000): 106–13. http://dx.doi.org/10.5988/jime1966.35.106.

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7

Liu, T., S. Zhou, and J. Wang. "Research progress of lithium-ion battery separator." Grand Altai Research & Education / Наука и образование Большого Алтая, no. 1(17) (July 11, 2022): 79–82. http://dx.doi.org/10.25712/astu.2410-485x.2022.01.010.

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As one of the inner layer components of lithium-ion batteries, the separator plays the role of blocking the positive and negative electrodes and providing channels for the movement of lithium ions. This chapter mainly expounds the use and performance characteristics of lithium-ion battery separators, the research progress of the three most widely used lithium battery separators, and systematically analyzes the characteristics of various thin-film materials, as well as the current four major processes for preparing separators: dry and wet. Method, centrifugal spinning method, electrospinning method, etc., and the future development direction of lithium-ion battery separator is prospected.

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8

Kim, Gwangho, Sanghwa Jeong, and Yang Jun Kang. "Ultrasound Standing Wave-Based Cell-to-liquid Separation for Measuring Viscosity and Aggregation of Blood Sample." Sensors 20, no. 8 (April 17, 2020): 2284. http://dx.doi.org/10.3390/s20082284.

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When quantifying mechanical properties of blood samples flowing in closed fluidic circuits, blood samples are collected at specific intervals. Centrifugal separation is considered as a required procedure for preparing blood samples. However, the use of centrifuge is associated with several issues, including the potential for red blood cell (RBC) lysis, clotting activation, and RBC adhesions in the tube. In this study, an ultrasonic transducer is employed to separate RBCs or diluent from blood sample. The ultrasonic radiation force is much smaller than the centrifugal force acting in centrifuge, it can avoid critical issues occurring under centrifuge. Then, the RBC aggregation and blood viscosity of the blood sample are obtained using the microfluidic technique. According to the numerical results, ultrasonic transducers exhibited a maximum quality factor at an excitation frequency of 2.1 MHz. Periodic pattern of acoustic pressure fields were visualized experimentally as a column mode. The half wavelength obtained was as 0.5 λ = 0.378 ± 0.07 mm. The experimental results agreed with the analytical estimation sufficiently. An acoustic power of 2 W was selected carefully for separating RBCs or diluent from various blood samples (i.e., Hct = 20% ~ 50%; diluent: plasma, 1x phosphate-buffered saline (PBS), and dextran solution). The present method was employed to separate fixed blood samples which tended to stack inside the tube while using the centrifuge. Fixed RBCs were collected easily with an ultrasonic transducer. After various fixed blood samples with different base solutions (i.e., glutaraldehyde solution, 1x PBS, and dextran solution) were prepared using the present method, RBC aggregation and the viscosity of the blood sample are successfully obtained. In the near future, the present method will be integrated into ex vivo or in vitro fluidic circuit for measuring multiple mechanical properties of blood samples for a certain longer period.

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9

Penkov, Pavel, and Yuri Morozov. "Separation of minerals in a centrifugal field using circulating concentration." E3S Web of Conferences 177 (2020): 01005. http://dx.doi.org/10.1051/e3sconf/202017701005.

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Due to the high speed of rotation of the centrifugal separator cone, it is possible to separate particles of small sizes. In its turn, the high speed of rotation of the centrifugal separator cone leads to clogging of the grooves of the separator cone with solid particles. The increased pressure of the turbulizing agent contributes to the loosening of solid particles in the grooves of the centrifugal separator cone, but can wash out particles with increased density from the grooves. Also, the loss of a valuable component is associated with the fact that particles of a valuable component located on the surface of the near-wall layer do not have time to get into the grooves in one cycle and are washed out of the separator cone together with the light fraction. In this regard, there is a need to study the increase in centrifugal separation using it in the circulating concentration scheme. Experiments were carried out in laboratory conditions on an artificial mixture of tungsten and quartz. The results of the experiments show an increase in enrichment rates.

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10

Dekhanov, V. I., and V. L. Makhtinger. "Variable drive of centrifugal separator." Chemical and Petroleum Engineering 23, no. 1 (January 1987): 3–5. http://dx.doi.org/10.1007/bf01150641.

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11

TANZHARIKOV, P. A., and A. T. DONESSOV. "APPLICATION OF GAS SEPARATORS TO IMPROVE CENTRIFUGAL PUMPS." Neft i gaz 1, no. 121 (April 15, 2020): 42–51. http://dx.doi.org/10.37878/2708-0080/2021-1.03.

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In this article, the problem of monitoring the energy consumption of electric centrifugal pumps and the method of application in the fields with the use of gas separators on the basis of reducing the harmful gas impact on electric centrifugal pumps is developed. Methods of optimization of power consumption by borehole pumps are considered. Conducting comparative bench tests of new stages of a centrifugal pump designed for pumping gas-liquid mixtures (GLM), and determining the degree of influence of free gas on the operating parameters in the entire possible working area of the stage when pumping model GLM. It is concluded that the technology of electric centrifugal pumps is used.

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12

Budaev, G., D. Danilov, A. Kuznechov, V. Lomakin, and V. Cheremushkin. "Research of centrifugal gas-liquid separator." IOP Conference Series: Materials Science and Engineering 589 (August 16, 2019): 012035. http://dx.doi.org/10.1088/1757-899x/589/1/012035.

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13

Klaeger, Uwe, Ulrich Schmucker, and Veikko Galazky. "DEVELOPMENT OF A NOVEL TECHNOLOGY FOR RAPIDLY ROTATING SYSTEMS FOR MEDICAL TECHNOLOGY." Management and Production Engineering Review 4, no. 4 (December 1, 2013): 28–34. http://dx.doi.org/10.2478/mper-2013-0036.

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Abstract Rapidly rotating systems such as centrifuges are widely used in medicine and laboratories to efficiently separate different constituents of liquids. Rotors, which hold sample containers, are an essential part of centrifuges. Since they are subjected to extreme mechanical loads, rotors are one of a centrifuge’s core safety components. Their deficits served as the point of departure for the development of a novel manufacturing technology, which is based on carbon fiber-reinforced polymers (CFRP). Its supporting structure is entirely in the loading plane, thus enabling the rotor to absorb higher centrifugal forces while requiring the same amount of material. The new design concept for the load-bearing structure includes a geodesically molded annular support member. It transmits forces better than present products and increases rigidity. In order to eliminate the known problems with obtaining the necessary manufacturing quality of hollow fiber composite bodies, the authors developed the process of centrifugal infusion. Their proposed solution is based on generating higher gravitation forces, thus effectively eliminating detrimental gas pockets and simultaneously optimizing surface quality and impregnation.

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14

Grāpis, O., N.-G. Ohlson, and J. Andersons. "Rotor—frame contact in a centrifuge installed on board a ship." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 3 (October 12, 2009): 635–46. http://dx.doi.org/10.1243/09544062jmes1603.

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The criticality of rotor and stator contact in a large-size marine separator is studied by numerical modelling. Two plausible mechanisms leading to such contact, namely rolling of a ship in steady-state motion and a suddenly occurring unbalance in the rotor, are considered. It is found that contact due to sea motion may be tolerable, while sudden development of unbalance at operating speed can lead to unacceptably high contact forces. This agrees with experience of centrifugal separators operating on board of ships.

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15

Lauritzen, M. "Quantities and units for centrifugation in the clinical laboratory." Journal of Automatic Chemistry 14, no. 3 (1992): 93–96. http://dx.doi.org/10.1155/s1463924692000208.

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The centrifuge is widely used in clinical laboratories for the separation of components. For example in laboratories performing biochemical analyses on body fluids it is routinely used to separate blood cells from plasma, to separate sediment from urine, to measure the volume fraction of erythrocytes in blood (the haematocrit), and to separate bound from free components in protein binding and immunoprocedures. Less routinely, centrifugation is used for separation of lipoproteins in reference procedures for their measurement, separation of cellular components, and separation of DNA fragments. Various quantities are used for the description and the calculation of the separation processes at centrifugation. The aim of this document is to provide manufacturers and users of centrifuges with a list of quantities and units for centrifugation consistent with the International System of Units, SI, and standards of the International Organization for Standardization (ISO).

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16

Ozherelev, D. A., V. V. Shalai, and I. A. Ridel. "Study of the operating efficiency of centrifugal separators for gas preparation." Proceedings of Higher Educational Institutions. Маchine Building, no. 9 (750) (September 2022): 63–72. http://dx.doi.org/10.18698/0536-1044-2022-9-63-72.

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There exist two ways to intensify production in an oil and gas facility: the first one involves accepting associated petroleum gas for treatment from third-party subsoil users and supplying gas to the main gas pipeline in accordance with the technical specifications, while the second one concerns upgrading crucial processing equipment, which includes separators. Associated petroleum gas as mixed with natural gas affects the separation process in terms of a significant decrease in separator efficiency for the same set of operational parameters due to increasing the mass flow rate. In turn, this low separation efficiency results in the separated gas ablating the liquid phase. This factor varies over a wide range and depends on the design and actual performance of the separator, as well as on the pressure, temperature and composition of the gas mixture supplied. We consider a tentative layout for a centrifugal separator of a combined design for treating natural gas containing a quantity of associated petroleum gas. The paper presents numerical computation results for the separation simulation, as well as data obtained during actual separator operation for different heat and pressure values. We established that the separator design proposed provides high efficiency of gas treatment.

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17

Lekanov, S. V., and N. I. Strikunov. "FLAT SIEVE SEPARATORS WITH ANNULAR PNEUMATIC SEPARATION DUCT." Vestnik Altajskogo gosudarstvennogo agrarnogo universiteta, no. 12 (December 2021): 107–11. http://dx.doi.org/10.53083/1996-4277-2021-206-12-107-111.

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The search for the optimal variant of the structural ar-rangement of flat-screen separators by centrifugal-air sepa-rators with annular pneumatic separation ducts is a promis-ing direction in the development of new equipment. This will significantly improve the technological performance of grain cleaning plants. It may be considered a promising direction for such research. Therefore, it is necessary to look for new options for the layout of grain cleaning ma-chines to increase their technological efficiency. Several variants of technological schemes for the operation of ex-isting flat-sieve separators with a centrifugal-air separator with an annular pneumatic separation ducts are proposed. The technological process of the modernized grain clean-ing plant based on the A1-BIS-100 plantis described. The main parameters of the gravity transporting device are de-termined; they fully ensure the operability of the modern-ized plant.

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18

Peng, W., A. C. Hoffmann, P. J. A. J. Boot, A. Udding, H. W. A. Dries, A. Ekker, and J. Kater. "Flow pattern in reverse-flow centrifugal separators." Powder Technology 127, no. 3 (November 2002): 212–22. http://dx.doi.org/10.1016/s0032-5910(02)00148-1.

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19

Jain, Amitabh, S. Biswas, Sadhna Shrivastava, and C. R. Jagga. "Evaluation of oil samples from centrifugal separators." Tribology International 26, no. 4 (August 1993): 237–40. http://dx.doi.org/10.1016/0301-679x(93)90003-j.

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20

Hole, M. J., and S. W. Simpson. "Separative performance in a vacuum arc centrifuge." IEEE Transactions on Plasma Science 27, no. 2 (April 1999): 620–27. http://dx.doi.org/10.1109/27.772294.

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21

Laplante, A. R., Y. Shu, and J. Marois. "Experimental Characterization of a Laboratory Centrifugal Separator." Canadian Metallurgical Quarterly 35, no. 1 (January 1996): 23–29. http://dx.doi.org/10.1179/cmq.1996.35.1.23.

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22

Oxford, RJ, JN Petersen, BJ Wie, SL Wooten, and GW Schneider. "Interface dynamics in a centrifugal cell separator." Transfusion 28, no. 6 (November 1988): 588–92. http://dx.doi.org/10.1046/j.1537-2995.1988.28689059038.x.

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23

Frolov, N. A. "Centrifugal separator rotors made of steel 04Kh25N5M2." Chemical and Petroleum Engineering 25, no. 7 (July 1989): 370–73. http://dx.doi.org/10.1007/bf01156177.

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24

Wooten, S. L., J. N. Petersen, and B. J. Van Wie. "Control and Optimization of Apheresis Procedures in a COBE 2997 Cell Separator." Journal of Biomechanical Engineering 113, no. 1 (February 1, 1991): 11–20. http://dx.doi.org/10.1115/1.2894078.

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To obtain more efficient operation of a COBE Model 2997 clinical cell separator using either a Single Stage II (SS II) or a Dual Stage separation chamber, modifications were made to allow complete computer control. Product cell density was detected using an optical sensor and controlled by automatic feedback through a microcomputer interface. Control was accomplished by automatically adjusting the red blood cell (RBC) and plasma product flow rates using a proportional-integral (PI) algorithm. Results show that, using either chamber, the product cell density can be maintained at a preselected value for extended periods of time without operator intervention. This system allowed investigation of optimal operating regions for plateletpheresis and leukapheresis procedures. The effects of centrifuge rpm and controller set point on centrifuge operation were investigated using a second order factorial experimental design. Theoretical significance of model parameters was assessed with the aid of a hindered settling model and simple reasoning about the interface position relative to the collection port. The results suggest that, in either chamber, the optimum operating region for plateletpheresis procedures occurs at moderate controller set points and high centrifuge rpm. The resultant operating efficiency and product purity values are approximately 63 percent and 0.65 respectively in the SS II chamber and approximately 70 percent and 0.70 respectively in the Dual Chamber. In the SS II, the optimum operating region for leukapheresis procedures occurred at high controller set point values for any centrifuge rpm above 1200 with an operating efficiency near 100 percent. However, in the Dual Chamber, the optimum operating region for leukapheresis procedures occurred at high controller set points and high centrifuge rpm’s, again providing an operating efficiency near 100 percent.

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25

MABROUK, MAI S., and MOHAMED A. EZZ. "HSLC_FUGE: HIGH SPEED AND LOW COST LABORATORY CENTRIFUGE FOR GENOMIC DNA PURIFICATION." Journal of Mechanics in Medicine and Biology 12, no. 05 (December 2012): 1240026. http://dx.doi.org/10.1142/s021951941240026x.

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A laboratory centrifuge is a piece of laboratory equipment, driven by a motor, which spins liquid samples at high speed. There are various types of centrifuges, depending on the size and the sample capacity. Like all other centrifuges, laboratory centrifuges work by the sedimentation principle, where the centripetal acceleration is used to separate substances of greater and lesser density. The information for synthesizing the molecules that allow organisms to survive and replicate is encoded in genomic DNA. Extracted and purified genomic DNA is very important for the analysis of single nucleotide polymorphisms (SNPs), disease states, and for many other multiplex and real-time PCR applications. The aim of this work is to design a genomic DNA extraction system that satisfies downstream application needs necessary for the successful completion of experiments and able to isolate a purified genomic DNA from many sources from bacteria to humans and also is able to encompass tissues from blood to muscle and from leaf to seed. Results revealed that the proposed system works with high efficiency and spins at up to 12,000 RPM to facilitate separation of the different phases of the extraction.

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26

Z. Rakhmonov, T. "Development of the high-performance separator based on a mathematical model of droplet deposition in centrifugal forces field." Applied Technologies and Innovations 10, no. 4 (November 24, 2014): 122–29. http://dx.doi.org/10.15208/ati.2014.19.

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27

Zhang, Hui Fen, and Lu Zheng Chen. "Iron Recovery from Hematite Tailings by a Novel HGMS-Centrifuge Process." Advanced Materials Research 1010-1012 (August 2014): 1585–89. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1585.

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During the processing of iron ores, a large quantity of low-grade tailings containing abundant iron values in fine particle size range is produced. A novel HGMS-Centrifuge process is proposed to recover iron values from a low-grade hematite tailings. In this process, the tailings is effectively roughed with pulsating high pulsating high gradient magnetic separator to produce a relatively high-grade iron concentrate, then this concentrate is cleaned with a continuous centrifugal concentrator to produce a high-grade iron concentrate. The results of investigation indicate that this novel process is capable of producing an iron concentrate assaying 58.48% Fe with 21.66% recovery from the tailings assaying 28.12 % Fe. It was concluded that this novel process may be effectively used to recover iron values from low-grade hematite tailings.

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28

Aziz, Fathan Abdul, Pudji Achmadi, and Mokhamad Fakhrul Ulum. "Hand-Powered Centrifuge Made from Cotton for Assessing Hematocrit." Biomedika 13, no. 1 (July 20, 2020): 58–67. http://dx.doi.org/10.31001/biomedika.v13i1.657.

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The hematocrit value test serves as a parameter to help reach an established diagnosis. A centrifuge is an equipment that is used to separate the components of blood from each other based on the properties of each constituent substance. This study aims to developing hand-powered centrifuge made from cotton material to assess the hematocrit of blood in pregnant and non-pregnant ewes. To make the Katunfuge, two circles were cut from a piece of cotton cloth that had been impregnated with batik wax. The knitting thread was inserted into the middle part of the cotton disc and each end rope was tied to the handler. The centrifugal speed resulted from Katunfuge was greater than 2,000 rpm, meaning that it is 99% effective for separating blood components in 15 minutes with 14 times of pulling with hands. The hematocrit values of pregnant ewes (33.0 ± 4.1) were lower than those of non-pregnant ewes (38.5 ± 3.4%). This has proven that Katunfuge is highly potential to be used to assess the hematocrit of other animals.

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29

Mohanty, M. K., B. Zhang, N. Khanna, A. Palit, and B. Dube. "Screen bowl centrifuge: a high-efficiency particle size separator." Mining, Metallurgy & Exploration 25, no. 2 (May 2008): 61–67. http://dx.doi.org/10.1007/bf03403387.

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30

Korolev, A. S. "New centrifugal liquid separators for the medicinal industry." Chemical and Petroleum Engineering 28, no. 12 (December 1992): 713–15. http://dx.doi.org/10.1007/bf01148393.

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31

Bogovalov, Sergey, and Vladimir Borman. "Separative Power of an Optimised Concurrent Gas Centrifuge." Nuclear Engineering and Technology 48, no. 3 (June 2016): 719–26. http://dx.doi.org/10.1016/j.net.2016.01.024.

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32

Kita, Yoshihiro, Itaru Kawakuchi, Hwan Choi, and Kumitsuru Okane. "Separating Efficiency of Grinding Chips by Centrifugal Separator." Journal of the Japan Society for Precision Engineering 58, no. 1 (1992): 93–98. http://dx.doi.org/10.2493/jjspe.58.93.

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33

Strikunov, Nikolay, Sergey Lekanov, Sergey Shcherbakov, and Maksim Mikityuk. "PARAMETERS OF DISCHARGING DEVICES OF CENTRIFUGAL AIR SEPARATOR." Vestnik Altajskogo gosudarstvennogo agrarnogo universiteta, no. 7 (July 2022): 97–102. http://dx.doi.org/10.53083/1996-4277-2022-213-7-97-102.

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34

Sharma, Rohan, and Myeongsub Kim. "Enhanced microalgae harvesting in a microfluidic centrifugal separator." Biomass and Bioenergy 159 (April 2022): 106386. http://dx.doi.org/10.1016/j.biombioe.2022.106386.

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35

Dekhanov, V. I., and N. A. Ratynskaya. "Development of high productivity liquid centrifugal separator drives." Chemical and Petroleum Engineering 49, no. 3-4 (July 2013): 162–66. http://dx.doi.org/10.1007/s10556-013-9719-3.

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36

Sokolov, V. I., S. G. Krainov, and Yu M. Polishchuk. "Dynamics of rotor of centrifugal separator during unloading." Chemical and Petroleum Engineering 24, no. 1 (January 1988): 9–12. http://dx.doi.org/10.1007/bf01150544.

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37

Sen, Sezai. "Gold recovery by KC from grinding circuit of Bergama CIP plant." Rem: Revista Escola de Minas 63, no. 3 (September 2010): 539–45. http://dx.doi.org/10.1590/s0370-44672010000300017.

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Numerous research studies have been done to improve the gold recovery methods and to fi nd alternative processing techniques in the last decade. The main goal in this search has become to design an effi cient plant employing environmentally acceptable processes today. For this purpose, the application of environmentally friendly, no chemical included techniques like centrifugal gravity separators are preferably used in gold recovery plants prior to or in place of cyanidation. In this study, the recovery of the gold particles accumulated in the grinding circuit of a CIP plant was investigated by using Knelson centrifugal separator. A KC-MD7.5 Knelson concentrator was installed in the grinding circuit of Bergama/Ovacik CIP plant. The concentrator was operated while the Mastra gold ore cyanidation tests were running on the plant.

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38

Boukadi, F., V. Singh, R. Trabelsi, F. Sebring, D. Allen, and V. Pai. "Appropriate Separator Sizing: A Modified Stewart and Arnold Method." Modelling and Simulation in Engineering 2012 (2012): 1–4. http://dx.doi.org/10.1155/2012/721814.

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Oil and gas separators were one of the first pieces of production equipment to be used in the petroleum industry. The different stages of separation are completed using the following three principles: gravity, centrifugal force, and impingement. The sizes of the oil droplets, in the production water, are based mainly on the choke valve pressure drop. The choke valve pressure drop creates a shearing effect; this reduces the ability of the droplets to combine. One of the goals of oil separation is to reduce the shearing effect of the choke. Separators are conventionally designed based on initial flow rates; as a result, the separator is no longer able to accommodate totality of produced fluids. Changing fluid flow rates as well as emulsion viscosity effect separator design. The reduction in vessel performance results in recorded measurements that do not match actual production levels inducing doubt into any history matching process and distorting reservoir management programs. In this paper, the new model takes into account flow rates and emulsion viscosity. The generated vessel length, vessel diameter, and slenderness ratio monographs are used to select appropriate separator size based on required retention time. Model results are compared to API 12J standards.

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Hatami, Ali, and Maryam Saadatmand. "Extremely Precise Blood–Plasma Separation from Whole Blood on a Centrifugal Microfluidic Disk (Lab-on-a-Disk) Using Separator Gel." Diagnostics 12, no. 11 (November 20, 2022): 2873. http://dx.doi.org/10.3390/diagnostics12112873.

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Due to the expansion of point-of-care devices, proposing a convenient and efficient method for blood–plasma separation would help with the use of point-of-care devices. Commercial microfluidic chips are only able to separate a limited amount of plasma, and the majority of these chips need an active valve system, which leads to increase manufacturing cost and complexity. In this research study, we designed a centrifugal microfluidic disk with a passive valve for ultra-accurate and efficient blood–plasma separation on a large scale (2–3 mL). The disk contained a separator gel, which, after applying the centrifugal force, separated the plasma and red blood cells. The passive valve worked based on the inertial force and was able to transfer more than 90% of the separated plasma to the next chamber. The results demonstrated that the separated plasma was 99.992% pure. This study compared the efficiency of the disk containing separating gel with the common lab-on-a-disk design for plasma separation. A comparison of the results showed that although the common lab-on-a-disk design could separate almost pure plasma as the disk contained separator gel, it could only transfer 60% of plasma to the next chamber.

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Iurii, Morozov, Penkov Pavel, and Dmitriev Vladimir. "Investigating the method of improving technological parameters of centrifugal separation with pneumatic turbulization." Izvestiya vysshikh uchebnykh zavedenii Gornyi zhurnal, no. 4 (June 25, 2020): 62–69. http://dx.doi.org/10.21440/0536-1028-2020-4-62-69.

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Research aim and subject. In the last few decades centrifugal separators have been widely used to extract gold. Large water consumption essential in the course of operation is the basic drawback of the method, which in its turn results in increased capital and operational expenditure. As soon as water is becoming increasingly more important resource, the study of centrifugal separation with air turbulization is of great practical significance. The aim of the present research is to study the method of improving technological parameters of centrifugal separation with the use of circulation concentration. Methodology. The proposed method of centrifugal separation has been realized in laboratory conditions at artificial quartz with grain size range of 0.1…+0.01 mm and tungsten powder with grain size range of 0.023…+0.02. Centrifugal separation has been carried out in a laboratory turbulization separator K-200VL equipped with a pneumatic mixing baffle for near-wall layer turbulization with compressed air streams delivered from inside the cone. On completion of each test, concentrate and tailings output has been determined as well as the mass fraction of tungsten within them; tungsten extraction to concentrate has been calculated. Summary. The obtained data prove high effectiveness of centrifugal separation in the mode of light fraction circulation. Centrifugal separation with the use of circulation concentration makes it possible to increase extraction of high-density particles to heavy fraction and increase the quality of heavy fraction, while the use of pneumatic turbulization leads to specific water consumption reduction.

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Anghel, Calin I. "A study concerning elastic analysis of disk centrifugal separators." Computer Methods in Applied Mechanics and Engineering 144, no. 3-4 (May 1997): 275–85. http://dx.doi.org/10.1016/s0045-7825(96)01174-7.

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Schultz, S. G., J. T. Holen, J. P. Donohue, and T. A. Francoeur. "Two-dimensional centrifugation for desk-top clinical chemistry." Clinical Chemistry 31, no. 9 (September 1, 1985): 1457–63. http://dx.doi.org/10.1093/clinchem/31.9.1457.

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Abstract We have developed a new system for clinical chemistry analysis, the Vision System, in which centrifugal force is used to separate whole blood, measure reagent and plasma volumes, and complete all steps required for a spectrophotometric analysis. The system is based on use of a multichambered plastic test pack containing liquid reagents, which can be centrifuged at 500 X g in two planes, oriented at right angles to each other. Alternating centrifugal fields allows liquid reagents and plasma to flow into highly precise measuring and mixing chambers. A unique flash lamp and diode array spectrometer provide for optical measurements of 10 test packs at as many as eight wavelengths simultaneously. The temperature of each individual test pack is controlled by using a flash lamp coupled to a liquid crystal temperature sensor. Microprocessor control allows as many as 10 different chemistry reactions to be measured simultaneously on whole-blood, plasma, or serum samples. Comparison with results by an established batch-photometric analyzer demonstrated excellent precision and accuracy for various clinical chemistry tests.

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Kakimoto, Ken-ichi, and Yuya Shinkai. "Structural Characterization of Na0.5K0.5NbO3Ceramic Particles Classified by Centrifugal Separator." Japanese Journal of Applied Physics 50, no. 9S2 (September 1, 2011): 09NC13. http://dx.doi.org/10.7567/jjap.50.09nc13.

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El-Sharabasy, M. M. A., M. M. Badr, and E. M. Abdel-Wahed. "CONSTRUCTION AND PERFORMANCE EVALUATION OF A CENTRIFUGAL MILK SEPARATOR." Misr Journal of Agricultural Engineering 30, no. 4 (October 1, 2013): 1097–116. http://dx.doi.org/10.21608/mjae.2013.99902.

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Honaker, R. Q., and A. Das. "Ultrafine Coal Cleaning Using a Centrifugal Fluidized-Bed Separator." Coal Preparation 24, no. 1-2 (January 2004): 1–18. http://dx.doi.org/10.1080/07349340490467668.

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Kishkin, A. A., M. G. Melkozerov, and A. V. Delkov. "Investigation of swirling diphasic flow in centrifugal phase separator." IOP Conference Series: Materials Science and Engineering 255 (October 2017): 012013. http://dx.doi.org/10.1088/1757-899x/255/1/012013.

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Kutepov, S. M., and V. A. Mikhailin. "Sensitivity of centrifugal separator rotor material to stress concentrations." Chemical and Petroleum Engineering 25, no. 7 (July 1989): 367–69. http://dx.doi.org/10.1007/bf01156176.

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van Kemenade, Erik, Bert Brouwers, and Rob van Benthum. "Centrifugal Separation with Emphasis on the Rotational Particle Separator." ChemBioEng Reviews 1, no. 6 (November 10, 2014): 262–72. http://dx.doi.org/10.1002/cben.201400027.

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Pshik, V. R. "Oil-water separator for a high-pressure centrifugal compressor." Chemical and Petroleum Engineering 33, no. 5 (September 1997): 524–27. http://dx.doi.org/10.1007/bf02416614.

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MERRILL, E. P. "Concentration of Glardia Cysts from Water by a Centrifugal Cream Separator." Journal of Food Protection 49, no. 11 (November 1, 1986): 891–92. http://dx.doi.org/10.4315/0362-028x-49.11.891.

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