Relevant bibliographies by topics / Pyrophylite

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Pyrophylite'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Pyrophylite"

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Andrić, Ljubiša, Dragan Radulović, Marko Pavlović, Milan Petrov, and Jovica Stojanović. "Possibility of applying pyrophylite as filler in refractory coatings." Zastita materijala 61, no. 3 (2020): 210–19. http://dx.doi.org/10.5937/zasmat2003210a.

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Watanabe, S., T. Ishikura, T. Yamamoto, N. Hayashi, T. Sumi, Y. W. Kim, D. Dyke, and G. Touchard. "The polarity of streaming current in water passing through a pyrophylite disc." Journal of Electrostatics 40-41 (June 1997): 717–21. http://dx.doi.org/10.1016/s0304-3886(97)00121-6.

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Arakawa, M., M. Higa, J. Leliwa-Kopystyński, and N. Maeno. "Impact cratering of granular mixture targets made of H2O Ice–CO2 Ice–pyrophylite." Planetary and Space Science 48, no. 15 (December 2000): 1437–46. http://dx.doi.org/10.1016/s0032-0633(00)00088-x.

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Honarpazhouh, Jamal, Ali Asghar Hassanipak, and Kumars Seifpanahi Shabani. "Integration of Stream Sediment Geochemical and Aster Data for Porphyry Copper Deposit Exploration in Khatun Abad, North West of Iran / Integracja geochemicznych danych o osadach dennych oraz danych pozyskanych z systemu aster do poszukiwań geologicznych w rejonie złóż miedzi porfirytowej w khatun abad, w północno-zachodniej części iranu." Archives of Mining Sciences 58, no. 1 (March 1, 2013): 37–54. http://dx.doi.org/10.2478/amsc-2013-0003.

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Urumieh-Dokhtar magmatic belt is the host of large porphyry copper deposits in Iran. Khatun Abad area is located in north west part of this belt, so in this study, the stream sediment geochemical survey and hydrothermal alteration zones extracted from ASTER data were used to generation new target for future lithogeochemical survey. In this study after a brief discussion on descriptive statistics, principal component analysis (PCA) and hierarchical cluster analysis were used to compress the information to a few maps and to assist in determining multi-element associations. Then C-A fractal method was used for map classification. In order to extraction hydrothermal zones ASTER data were used. ASTER SWIR bands are most useful for the identification of alteration minerals such as Alunite, Pyrophylite, Kaolinite, Sericute and Carbonates. In this paper based on spectral analysis of ASTER SWIR data six maps of alteration zones were prepared. Geochemical study and spectral analysis of ASTER data showed that mineralization and alteration are limited to E1lb and gr lithological units and have NW-SE trends from east of Khatun Abad to Ghezeljeh-Gheshlaghi.
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Lantenois, S., J. M. Beny, F. Muller, and R. Champallier. "Integration of Fe in natural and synthetic Al-pyrophyllites: an infrared spectroscopic study." Clay Minerals 42, no. 1 (March 2007): 129–41. http://dx.doi.org/10.1180/claymin.2007.042.1.09.

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AbstractNumerous studies focus on the relationships between chemical composition and OH-band positions in the infrared (IR) spectra of micaceous minerals. These studies are based on the coexistence, in dioctahedral micas or smectites, of several cationic pairs around the hydroxyl group which each produce a characteristic band in the IR spectrum. The aim of this work is to obtain the wavenumber values of the IR OH vibration bands of the (Al-Fe3+)-OH and (Fe3+-Fe3+)-OH local cationic environments of ‘pyrophyllite type’ in order to prove, disprove or modify a model of dioctahedral phyllosilicate OH-stretching band decomposition. Natural samples are characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) and Raman spectroscopies and electron microprobe; the hydrothermal synthesis products are also analysed by powder XRD and FTIR after inductively coupled plasma measurements to obtain the chemical compositions of starting gel phases. Natural samples contain some impurities which were eliminated after acid treatment; nevertheless, a small Fe content is found in the pyrophyllite structure. The amount of Fe which is incorporated within the pyrophyllite structure is much more important for the synthetic samples than for the natural ones. The IR OH bands were clearly observed in both natural and synthetic pyrophyllites and assigned to hydroxides bonded to (Al-Al), (Al-Fe) and (Fe-Fe) cationic pairs. During this study, three samples were analysed by DTG to check the cis- or trans-vacant character of the layers and to determine the influence of this structural character on the OH-stretching band position in IR spectroscopy.
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Pee, J. H., A. N. Kwak, Jong Young Kim, Yoo Jin Kim, and Kyung Ja Kim. "Effect of Pyrophyllite on the Mullite Generation in Ternary Porcelain System." Key Engineering Materials 512-515 (June 2012): 575–79. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.575.

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Promoting of mullite generation has been studied by replacing kaolinite with pyrophyllite because of mullite has excellent strength and thermal shock resistance. Effects of promoting of mullite generation and vitrification by replacing kaolinite with pyrophyllite on the mechanical and thermal properties were investigated. Addition of 45-55% pyrophyllite as a replacement of kaolinite (pyrophyllite (45-55%)-feldspar (30%)-clay (20%)) could vitrify samples (water absorption: 0.05%, bulk density: 2.66g/cm3) and improve the strength (122MPa) of samples fired at 1280°C. In ternary porcelain system, pyrophyllite-feldspar-clay, mullite generation of samples with 50% pyrophyllite reaches about 78.7% and thermal expansion coefficient is 5.4×10-6/K. Beyond 50% pyrophyllite addition, quartz and cristobalite phases increased. And thermal expansion coefficient of samples decreased with increasing of mullite amount.
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Liu, Bo, Hai Feng Chen, and Pei Song Tang. "The Dynamics for Aqueous Sodium Adsorption and Characterization of Natural Pyrophyllite." Applied Mechanics and Materials 117-119 (October 2011): 1129–32. http://dx.doi.org/10.4028/www.scientific.net/amm.117-119.1129.

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In this experiment, pyrophyllite as the main materials used the flame photometer to measure adsorption. Using the qualitative analysis of the samples of XRD with internal structure and found that pyrophyllite used in the experiment as a natural mineral, the presence with other minerals. Meanwhile, scanning electron micrographs (SEM) from the display showed that the effect of pyrophyllite adsorption for cations should be more significant. Therefore, this experiment focused on the time, Na+ concentration, on the pyrophyllite and different pyrophyllite concentrations (adsorbent dosage) effect on the adsorption, in addition to the adsorption dynamics. The results showed that pyrophyllite adsorption sodium in the best time of equilibrium was 20 minutes, the concentration of NaCl was 50 mg/L, pH = 7, temperature was 313 K, the concentration of pyrophyllite was 5 mg/L.
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Park, Jeong-Ann, Jae-Hyun Kim, Chang-Gu Lee, and Song-Bae Kim. "Pyrophyllite clay for bacteriophage MS2 removal in the presence of fluoride." Water Supply 14, no. 3 (December 27, 2013): 485–92. http://dx.doi.org/10.2166/ws.2013.224.

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The aim of this study was to investigate the removal of the bacteriophage MS2 from aqueous solution using pyrophyllite. Batch experiments were conducted to examine MS2 sorption to pyrophyllite. The influence of fluoride, a groundwater contaminant, on the removal of MS2 was also observed. Column experiments were performed with pyrophyllite to examine MS2 removal in the absence and presence of fluoride. Batch results demonstrated that pyrophyllite was effective in MS2 removal. The percentage removal of MS2 increased from 5.26% to 99.99% (4.0 log removal) with increasing pyrophyllite concentrations from 0.2 to 20 g/L. At fluoride concentrations of 5 and 10 mg/L, the log removals of MS2 by pyrophyllite were 3.05 and 2.54, respectively, which were lower than that with no fluoride present. The results suggested that the removal of MS2 by pyrophyllite was influenced by fluoride ions because fluoride ions could compete with MS2 for sorption sites on the pyrophyllite surfaces. Column results showed that pyrophyllite was effective in MS2 removal under flow-through conditions, with a removal capacity of 8.17 × 106pfu/g with no fluoride present and 4.70 × 106pfu/g with 5 mg/L fluoride present.
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Mansour, Sabria Malika. "Use of Natural Pyrophyllite as Cement Substitution in Ultra Performance Polypropylene Fiber Concrete." International Journal of Engineering Research in Africa 56 (October 4, 2021): 123–35. http://dx.doi.org/10.4028/www.scientific.net/jera.56.123.

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The present work investigates the use of an alumino-silicate material, the pyrophyllite as cement substitution, synthetic polypropylene fibers and binder to create an unusual ultra-performance fiber concrete; new composite, which offers a wide field of possible use in construction industry. Effect of pyrophyllite on the physical-mechanical properties is analyzed. One reference fiber concrete without pyrophyllite and three fiber concretes containing 10%, 20%, 30% of pyrophyllite were elaborated. Results show that the pyrophyllite affects the characteristics of the concrete. Indeed, in the hardened state, the density of fiber concrete decreased with pyrophyllite rate increasing. Moreover, the use of pyrophyllite slows down the hardening process of concrete, consequently producing at early ages, compressive, flexural and tensile strengths and elastic modulus of concretes approaching without exceeding those of the reference fiber concrete. The fiber concretes are also considered to be of good quality. It seems that the rate of 10 % of pyrophyllite generates the best physical-mechanical performances that approach those of the reference fiber concrete. The use of pyrophyllite as a cement substitution is beneficial since it can help to decrease the production of cement; the amount of CO2 released and protects the environment.
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Sheng, Jia Wei, Li Ping Zhang, Jun Yan, Qing Sun, and Jian Zhang. "Nano-Structural Alteration of Pyrophyllite by Grinding Revealed by X-Ray Diffraction and High-Resolution Transmission Electron Microscopy." Journal of Nano Research 40 (March 2016): 72–78. http://dx.doi.org/10.4028/www.scientific.net/jnanor.40.72.

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The mechanical destruction of the pyrophyllite structure and final ground products upon grinding with a laboratory planetary ball mill were investigated using high-resolution transmission electron microscope (HRTEM) coupled with selected area electron diffraction (SAED), field emission scanning electron microscope (SEM) and X-ray diffraction (XRD). Grinding produced a profound structural alteration, resulting in increasing amorphization. Increasing the intensity of grinding resulted in acceleration of the mechanically induced amorphization of the pyrophyllite structure. The pyrophyllite phase was transformed into its anhydride phase during the process of the prolonged grinding. Increasing the grinding intensity resulted in faster destruction of the pyrophyllite structure. The plate-like microcrystal exhibited the 2M-pyrophyllite crystal structure. The pyrophyllite anhydride phase was existed after grinding.
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Dissertations / Theses on the topic "Pyrophylite"

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Дайнеко, Катерина Борисівна. "Низькотемпературний електротехнічний фарфор." Thesis, НТУ "ХПІ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/17935.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.17.11 – технологія тугоплавких неметалічних матеріалів. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2015 р. Дисертацію присвячено розробці енергоощадної технології фарфору електро-технічного призначення на основі вітчизняної пірофілітової та польовошпатової сировини. При проектуванні складів низькотемпературного електрофарфору використані результати мікрорівневого моделювання поведінки матеріалу при механічних навантаженнях та фізико-хімічних досліджень композицій, що належать елементарному тетраедру A₃S₂–NAS₆–KAS₆–S системи Na₂O–K₂O–Al₂O₃–SiO₂. Область композицій для розробки фарфору з температурою випалу 1200 °С обмежена вмістом компонентів, мас. %: SiO₂ 55÷65, Al₂O₃ 20÷45, K₂O 2÷4, Na₂O 2÷4. Встановлено, що для інтенсифікації спікання та фазоутворення електрофарфору при зниженій температурі випалу необхідним є використання комплексних плавнів та мінералізуючих добавок. На основі досліджень складу та властивостей вітчизняних та зарубіжних польовошпатових і пірофілітових матеріалів обґрунтовано вибір сировини для виробництва низькотемпературного електрофарфору. Встановлено фізико-хімічні закономірності формування низькотемпературного електрофарфору та отримані математичні моделі залежностей його властивостей від складу мас. Розроблено склади і технологічні параметри виготовлення низько-температурного електрофарфору з комплексом високих електрофізичних та механічних властивостей (пробивна напруга Епр = 30 кВ∙мм¯¹, питомий об'ємний електроопір ρV20°С = 4,1·10¹⁴ Ом·см, тангенс кута діелектричних втрат tg δ ·10³= 12,1, міцність на розрив ζрозр = 31 МПа).
Thesis for granting the Degree of the Candidate of Technical Sciences on the spe-ciality 05.17.11 – Technology of Refractory Non-Metallic Materials. – National Technical University "Kharkiv Polytechnical Institute", Kharkiv, 2015. The thesis is devoted to the development of porcelain energy saving technology of electrotechnical designation on the basis of national feldspar and pyrophylite raw materials. The results of microlevel modeling of material behavior at temperature-strength stress and physical-chemical research of mixtures belonging to elementary tetrahedron A₃S₂–NAS₆–KAS₆–S of system Na₂O–K₂O–Al₂O₃–SiO₂ were used when designing low-temperature electroporcelain compositions. The mass area for porcelain designing compositions with firing temperature 1200 °C is limited by component content, weight. %: SiO₂ 55÷65, Al₂O₃ 20÷45, K₂O 2÷4, Na₂O 2÷4. It was shown that for sintering intensification and electroporcelain phase formation at low firing temperature it is necessary to use complex fluxes and mineralizing additives. Based on studies of composition and properties of Ukrainian and foreign feldspar and pyrophylite materials the choice of raw materials for the production of low electroporcelain was justified. The physical and chemical regularities of low electroporcelain formation were shown and the mathematical models of its properties dependence on the mass composition were received. The composition and technological parameters of manufacturing low-temperature eleсtroporcelain with complex of high electrophysical and mechanical properties (breakdown voltage 30 kV∙mm¯¹, volume resistivity 4,1·10¹⁴ Оhm·cm, dielectric loss tg δ·10³= 12,1, tensile strength of 31 MPa) were developed.
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Дайнеко, Катерина Борисівна. "Низькотемпературний електротехнічний фарфор." Thesis, НТУ "ХПІ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/17928.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.17.11 – технологія тугоплавких неметалічних матеріалів. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2015 р. Дисертацію присвячено розробці енергоощадної технології фарфору електро-технічного призначення на основі вітчизняної пірофілітової та польовошпатової сировини. При проектуванні складів низькотемпературного електрофарфору використані результати мікрорівневого моделювання поведінки матеріалу при механічних навантаженнях та фізико-хімічних досліджень композицій, що належать елементарному тетраедру A₃S₂–NAS₆–KAS₆–S системи Na₂O–K₂O–Al₂O₃–SiO₂. Область композицій для розробки фарфору з температурою випалу 1200 °С обмежена вмістом компонентів, мас. %: SiO₂ 55÷65, Al₂O₃ 20÷45, K₂O 2÷4, Na₂O 2÷4. Встановлено, що для інтенсифікації спікання та фазоутворення електрофарфору при зниженій температурі випалу необхідним є використання комплексних плавнів та мінералізуючих добавок. На основі досліджень складу та властивостей вітчизняних та зарубіжних польовошпатових і пірофілітових матеріалів обґрунтовано вибір сировини для виробництва низькотемпературного електрофарфору. Встановлено фізико-хімічні закономірності формування низькотемпературного електрофарфору та отримані математичні моделі залежностей його властивостей від складу мас. Розроблено склади і технологічні параметри виготовлення низько-температурного електрофарфору з комплексом високих електрофізичних та механічних властивостей (пробивна напруга Епр = 30 кВ∙мм¯¹, питомий об'ємний електроопір ρV20°С = 4,1·10¹⁴ Ом·см, тангенс кута діелектричних втрат tg δ ·10³= 12,1, міцність на розрив ζрозр = 31 МПа).
Thesis for granting the Degree of the Candidate of Technical Sciences on the spe-ciality 05.17.11 – Technology of Refractory Non-Metallic Materials. – National Technical University "Kharkiv Polytechnical Institute", Kharkiv, 2015. The thesis is devoted to the development of porcelain energy saving technology of electrotechnical designation on the basis of national feldspar and pyrophylite raw materials. The results of microlevel modeling of material behavior at temperature-strength stress and physical-chemical research of mixtures belonging to elementary tetrahedron A₃S₂–NAS₆–KAS₆–S of system Na₂O–K₂O–Al₂O₃–SiO₂ were used when designing low-temperature electroporcelain compositions. The mass area for porcelain designing compositions with firing temperature 1200 °C is limited by component content, weight. %: SiO₂ 55÷65, Al₂O₃ 20÷45, K₂O 2÷4, Na₂O 2÷4. It was shown that for sintering intensification and electroporcelain phase formation at low firing temperature it is necessary to use complex fluxes and mineralizing additives. Based on studies of composition and properties of Ukrainian and foreign feldspar and pyrophylite materials the choice of raw materials for the production of low electroporcelain was justified. The physical and chemical regularities of low electroporcelain formation were shown and the mathematical models of its properties dependence on the mass composition were received. The composition and technological parameters of manufacturing low-temperature eleсtroporcelain with complex of high electrophysical and mechanical properties (breakdown voltage 30 kV∙mm¯¹, volume resistivity 4,1·10¹⁴ Оhm·cm, dielectric loss tg δ·10³= 12,1, tensile strength of 31 MPa) were developed.
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3

Hayes, John P. "Geological setting and genesis of the Eastern Avalon High Alumina Belt /." Internet access available to MUN users only, 1996. http://collections.mun.ca/u?/theses,38145.

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Belzunces, Bastien. "Atomic-scale study of pesticide interaction with soil mineral matter." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30352/document.

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Les pesticides sont des molécules utilisées en grandes quantités en France et dans le monde entier pour la protection des cultures. Lorsque ces substances sont répandues une grande quantit é rejoint les sols. Dans cette thèse, le devenir de pesticides dans le sol est étudié. Pour cela, trois pesticides ont été sélectionnés : l'atrazine, la métamitrone et le fenhexamide ; et une argile de type montmorillonite a été choisie. Les simulations menées lors de cette thèse emploient le formalisme de la Théorie de la Fonctionnelle de la Densité (DFT). La première partie de cette thèse porte sur l'étude statique de l'interaction de l'atrazine avec la pyrophyllite et la montmorillonite. Dans les chapitres suivants, la Dynamique Moléculaire Car-Parrinello en DFT est utilisée. L'étude débute par les pesticides seuls, métamitrone et fenhexamide, puis leurs complexes avec un ou deux cations Na+ et Ca2+. Ensuite, l'adsorption de ces entités, en présence ou non d'eau, sur une surface de montmorillonite, est envisagée à l'aide de calculs périodiques. Dans le second chapitre de ce travail, des résultats issus d'optimisations de géométries en phase gazeuse sont présentés. La troisième partie développe les résultats obtenus pour l'adsorption de la métamitrone et du fenhexamide sur le modèle d'argile choisi. Dans le dernier chapitre, certaines des structures les plus stables de chaque pesticide adsorbé sur la surface ont été solvatées et une étude de la désorption du fenhexamide de la surface de montmorillonite a été réalisée à l'aide de la méthode Umbrella Sampling. Ce travail a permis de quantifier théoriquement la barrière d'énergie libre à franchir pour désorber le fenhexamide de la montmorillonite hydratée
Pesticides are widely employed molecules for crop protection in France and all over the world. When these substances are spread an important quantity reaches soils. In the present thesis, pesticide fate is under study. For this purpose, three pesticides have been selected: atrazine, metamitron and fenhexamid ; and the most abundant smectite clay type, montmorillonite, has been chosen. The computational simulations conducted in this thesis use the Density Functional Theory (DFT) formalism. The first part of this thesis treats a static study of atrazine interaction with pyrophyllite and montmorillonite. In the following chapters, Car-Parrinello Molecular Dynamics through DFT is used. This study begins with isolated pesticides, metamitron and fenhexamid, then their complexes with one or two Na+ and Ca2+. Finally, the adsorption of these entities, in the presence of water or not, onto a montmorillonite surface, is considered using periodic calculations. Within the second chapter of the present work, results from geometry optimisations in gas phase are presented. The third part develops the obtained results on the adsorption of metamitron and fenhexamid over the chosen clay model. In the last chapter of this thesis, some of the most stable structures of each adsorbed pesticide onto the surface have been solvated and a study of fenhexamid desorption from the montmorillonite surface using Umbrella Sampling has been done. This work allowed to quantify theoretically the free energy barrier to overcome to desorb fenhexamid from the hydrated montmorillonite
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Толкач, Олександр Миколайович, А. Н. Толкач, and O. M. Tolkach. "Геометризація родовищ пірофілітової сировини на основі комплексного врахування якісних показників покладу." Thesis, Видавництво НГУ, 2013. http://ir.nmu.org.ua/handle/123456789/2923.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.15.01 – «Маркшейдерія». Державний вищий навчальний заклад «Національний гірничий університет», Дніпропетровськ, 2013.
Диссертация на соискание ученой степени кандидата технических наук по специальности 05.15.01 - «Маркшейдерия». Государственное высшее учебное заведение «Национальный горный университет», Днепропетровск, 2013.
Ph.D. thesis in Engineering Science by the speciality 05.15.01 − Mine Surveying. State Higher Educational Institution «National Mining University», Dnipropetrovsk, 2013.
Дисертація присвячена питанням дослідження і встановлення геометричних закономірностей зміни якісних показників покладів пірофілітової сировини на базі використання сучасних програмних прикладних пакетів. У результаті виконаних досліджень на основі математичного та комп’ютерного моделювання встановлені основні типи взаємозв’язків між показниками якості пірофілітових сланців, залежність мінливості якісних показників від параметрів залягання покладу; розроблено методики багатофакторної геометризації пірофілітових сланців за комплексним показником якості та пріоритетністю розробки технологічних зон на основі комплексного врахування показників якості. На основі комплексного аналізу просторової мінливості якісних показників покладу із застосуванням сучасних комп’ютерно-інформаційних технологій виконано поділ родовища на технологічні зони залежно від параметрів якості сировини та напрямків її використання, встановлено закономірність розміщення основних технологічних типів пірофілітової сировини.
Диссертация посвящена вопросам исследования и установления геометрических закономерностей изменения качественных показателей месторождений пирофиллитового сырья на базе использования современных программных прикладных пакетов и разделения месторождений пирофиллитового сырья на технологические зоны с целью обеспечения рациональной и комплексной его разработки. В результате выполненных исследований на основе математического и компьютерного моделирования установлены основные типы взаимосвязей между показателями качества пирофиллитовых сланцев, зависимость изменчивости качественных показателей от параметров залегания залежи. Разработаны методики многофакторной геометризации пирофиллитовых сланцев по комплексному показателю качества и приоритетности разработки технологических зон на основании комплексного учета показателей качества. Предложено стратегию управления качеством пирофиллитовых сланцев по данным многофакторной геометризации. Опираясь на результаты теоретических и экспериментальных исследований, впервые для месторождений пирофиллитового сырья предложена возможность получения комплексного плана, который количественно выражает качественные характеристики залежи. В результате комплексного анализа пространственной изменчивости качественных показателей залежи с применением современных компьютерно-информационных технологий и ГИС выполнено разделение месторождения на технологические зоны в зависимости от параметров качества сырья и направлений его использования, что дает возможность наиболее полно использовать породу месторождения в соответствии с ее качеством и рациональностью использования. В работе на основе анализа модели размещения технологических зон впервые установлены закономерности размещения основных технологических типов пирофиллитового сырья. Разработанная методика обеспечивает возможность создания различных электронных геологических и горно-геометрических планов, отчетов, дополнений и карт, что значительно упрощает принятие решений при последующем геологическом изучении, геолого-экономической оценке и разработке месторождения.
The thesis is devoted to researching and establishing of geometric patterns of the change in quality indicators of pyrophyllite deposits based on the use of modern software application packages. As a result of the researches based on mathematical and computer modeling the basic types of relationships between quality indicators and dependence of quality indicators variability of deposit parameters were established. The methods of multifactorial geometrization based on complex quality index and on the priority of mining technological zones based on comprehensive account of quality indicators were made. Based on the comprehensive analysis of the spatial variability of deposit quality indicators with modern computer and information technology the division of deposit on technological zones depending on the parameters of raw materialsʼ quality and on the areas of their use was made. The model of the allocation of the basic technological types of pyrophyllite was found.
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6

Mensi, Gabriel. "Etude pétrogénétique des occurrences alumineuses de l'unité 1 d'Avène (Montagne noire, Hérault)." Phd thesis, Grenoble 1, 1988. http://tel.archives-ouvertes.fr/tel-00744051.

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Des affleurements alumineux à kaolinite, andalousite, pyrophyllite et diaspore se répartissent en six groupes principaux situés dans l'unité 1 d'Avène (Nord-est de la Montagne Noire). Ces roches massives qui contiennent essentiellement de la silice, de l'alumine et de l'eau sont bordées par une enveloppe sériciteuse et silicifiée à tourmaline et pyrite. Le passage de la métarhyolite encaissante, d'âge Précambrien ou Cambrien inférieur, aux faciès à silicates et hydrates d'alumine est graduel. Il se fait par une disparition progressive des feldspaths (métarhyolites sans feldspath) puis de la foliation métamorphique avec apparition d'andalousite. Les zonalités observées se rencontrent dans d'autres sites mondiaux (Caroline du Nord, Maroc) à altération hautement alumineuse où la roche encaissante est une rhyolite et les altérites présentent les mêmes types de minéraux que les affleurements alumineux de la Montagne Noire. L'étude pétrogénétlque montre que l'essentiel des transformations est antérieur au métamorphisme hercynien (phase hydrothermale majeure) et que les zonalités ainsi que la diversité des faciés observés peuvent s'expliquer par un modèle génétique unique présentant des affinités avec le modèle génétique des porphyres cuprifères. La phase hydrothermale majeure se caractérise par la superposition de deux épisodes d'altération qui se produisent entre le Cambrien inférieur et le Cambrien moyen dans un contexte géodynamique distensif: - l'altération séricitique précoce résulte d'un lessivage de la roche par des fluides acides (pH-4),relativement chauds (T-400'C), sursaturés en silice et contenant principalement du bore, du soufre, du fluor et du sodium. Les feldspaths de la roche, sous faible couverture et peu compactée, (P-30 MPa), sont transformés en muscovite avec un lessivage intense du sodium. La silice, le magnésium et le fer sont lessivés vers les bordures des zones d'apport où cristallisent la dravite et la pyrite. - l'altération argilitique avancée qui se surimpose à la première est liée à une baisse de la température et une augmentation de l'acidité des fluides qui sont enrichis en phosphore. Dans la zone centrale la muscovite est transformée en andalousite avec par .endroit cristallisation de scorzalite (phosphate accidentel) . Les alcalins et la silice sont lessivés vers la périphérie. Un modète génétique général qui explique les principales caractéristiques des sites a été élaboré. Il a la forme d'un ellipsoide de révolution à zone interne d'altération argililique avancée plus ou moins riche en andalousite et à enveloppe externe d'altération séricitique. Les zones silicifiées se répartissent dans l'enveloppe séricitique et à la base (voies d'apport des fluides) de l'ellipsoide. La topographie des sites riches en filons de quartz recoupe le modèle à sa base alors que la topographie des sites à filons de quartz rares et riches en andalousite recoupe le modèle dans sa partie haute. Les autres particularités s'expliquent par une évolution des paragenèses originelles dépendant du contexte géologique local ou régional: -au cours du métamorphisme hercynien les altérites sont reprises dans la schistosité de flux ce qui explique leur aspect stratiforme actuel et les déformations observées sur certains sites. -les sites de bordure du bassin houiller sont soumis à l'altération antéstéphanienne qui se manifeste par des phénomènes de bauxitisation localisés avec oxydation superficielle et altération de l'andalousite en kaolinile et boehmite. La boehmite est ensuite déstabilisée en diaspore sous faible couverture houillère. - les sites de Serviès et du Lissobre situés plus au Nord n'ont pas été soumis à l'altération antéstéphanienne ce qui explique l'absence de boehmite et de diaspore. A la fin du Stépthanien un contexte distensif associé à un réchauffement régional (métamorphisme tardistéphanien) provoque des circulations de fluides ( T-200'C) qui conduisent à la cristallisation de pyrophyllite à partir de la kaolinite dans les fractures des altérites. Au Permo-Trias des circulations de fluides liées à une période de distension provoquent l'altération de la scorzalite et la cristallisation de barytine en conditions supergènes.
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7

HUANG, ZHONG-MOU, and 黃重謀. "A study on the pyrophyllite isograd in metamorphic terrain, sotuhern Taiwan." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/50829975593666222263.

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8

Liu, Yu-Mei, and 劉玉梅. "A study on the hydrothermal synthesis of analcime from pyrophyllite in Hsiang-Yang Sericite Ore." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/76509428180393248615.

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碩士
國立成功大學
資源工程學系碩博士班
94
In this study, the mica powders produced by Sunshine Mineral Company was used as the starting material. The content of sericite is about 57 % (muscovite and paragonite) with the other major mineral pyrophyllite and very small amount of chlorite. Hydrothermal reactions was used to synthesize analcime. The primary mineralizers used were Na2SiO3, NaOH, Na2CO3, NaCl, while NaF, NaCl, NaOH, Na2CO3, Na3PO4 as minor mineralizers. Reaction temperatures were between 150oC~240 oC. The reaction conditions, i.e. type and concentration of mineralizers, solid/liquid ratio, reaction temperature and time were investigated to find their effects on the phase and morphology of analcime produced, so as to establish the primary synthesis conditions.
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Chang, Cheng-Huei, and 張振輝. "A study on the hydrothermal modification of sericite and pyrophyllite in Hsiang-Yang Sericite ore." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/89456843372323382333.

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Books on the topic "Pyrophylite"

1

G, Korablev G., Udachin V. N, and Koroteev V. A, eds. Pirofillitovoe syrʹe paleovulkanicheskikh oblasteĭ. Moskva: "Nauka", 1989.

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MacLean, M. Talc and pyrophyllite in British Columbia. Victoria, B.C., Canada: Mineral Resources Division, Geological Survey Branch, 1987.

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Geological Survey of Western Australia., ed. Talc, pyrophyllite, and magnesite in Western Australia. Perth, W.A: Geological Survey of Western Australia, 1996.

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Clifton, Robert A. Talc and pyrophyllite: A chapter from Mineral facts and problems, 1985 edition. [Washington, D.C.?]: U.S. Dept. of the Interior, Bureau of Mines, 1985.

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Howard, Daniel M. Mineral commodity report, talc and related minerals: 1986. Sacramento, Calif: California Dept. of Conservation, Division of Mines and Geology, 1986.

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Howard, Daniel M. Mineral commodity report, talc and related minerals. Sacramento, Calif: California Dept. of Conservation, Division of Mines and Geology, 1986.

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Zerdazi, Yacine. A study of the electrical conductivity of dry pyrophyllite and other dry rocks at high temperatures. Norwich: University of East Anglia, 1987.

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The 2006-2011 World Outlook for Dolomite, Dolomite-Magnesite, Forsterite, Pyrophyllite-Zircon, Carbon and Graphite Crucibles, Retorts, Stopper Heads, Natural Graphite, Refractories, and Molten Cast. Icon Group International, Inc., 2005.

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Book chapters on the topic "Pyrophylite"

1

Bährle-Rapp, Marina. "Pyrophyllite." In Springer Lexikon Kosmetik und Körperpflege, 463. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_8689.

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Zelazny, Lucian W., Pamela J. Thomas, and Christophe L. Lawrence. "Pyrophyllite-Talc Minerals." In Soil Mineralogy with Environmental Applications, 415–30. Madison, WI, USA: Soil Science Society of America, 2018. http://dx.doi.org/10.2136/sssabookser7.c13.

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Zelazny, L. W., and G. N. White. "The Pyrophyllite-Talc Group." In SSSA Book Series, 527–50. Madison, WI, USA: Soil Science Society of America, 2018. http://dx.doi.org/10.2136/sssabookser1.2ed.c11.

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Burzo, E. "Pyrophyllite, talc and related silicates." In Phyllosilicates, 59–107. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-44748-1_5.

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Evans, B. W., and S. Guggenheim. "Chapter 8. TALC, PYROPHYLLITE, AND RELATED MINERALS." In Hydrous Phyllosilicates, edited by S. W. Bailey, 225–94. Berlin, Boston: De Gruyter, 1988. http://dx.doi.org/10.1515/9781501508998-013.

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Rieger, Konrad C. "Wollastonite, Pyrophyllite, and Talc for Rapid-Fire Wall Tile Bodies." In Ceramic Engineering and Science Proceedings, 180–82. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470314807.ch26.

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Křest'an, J., Pavol Šajgalík, Zdenĕk Pánek, and David Salamon. "Low Cost SiAlON from Pyrophyllite with High Hardness and Good Corrosion Resistance." In Fractography of Advanced Ceramics II, 312–15. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-973-3.312.

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Chang, Soomin, Deaeun Kwon, and Jeonghwan Kim. "New Approach with Fluidized Bed Reactor Using Low-Cost Pyrophyllite/Alumina Composite Membrane for Real-Metal Plating Wastewater Treatment." In Frontiers in Water-Energy-Nexus—Nature-Based Solutions, Advanced Technologies and Best Practices for Environmental Sustainability, 177–78. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13068-8_43.

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"pyrophylite." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 1061. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_164543.

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"Pyrophyllit m." In Wörterbuch GeoTechnik/Dictionary Geotechnical Engineering, 865. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-33335-4_162200.

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Conference papers on the topic "Pyrophylite"

1

Fuad, Abdulloh, Nandang Mufti, Markus Diantoro, Subakti, and Septa Kurniawati S. "Synthesis and characterization of highly purified nanosilica from pyrophyllite ores." In THE 4TH INTERNATIONAL CONFERENCE ON THEORETICAL AND APPLIED PHYSICS (ICTAP) 2014. AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4943715.

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Korobiichuk, Igor. "HEAT ACCUMULATING BLOCKS BASED ON THE PYROPHYLLITE AND THERMALLY EXPANDED GRAPHITE." In 16th International Multidisciplinary Scientific GeoConference SGEM2016. Stef92 Technology, 2016. http://dx.doi.org/10.5593/sgem2016/b12/s04.140.

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Elsandika, Gabriela, Abdulloh Fuad, Markus Diantoro, Siti Zulaika, and Subakti. "Preparation and characterization of superhydrophobic glass surface using pyrophyllite nanosilica coating." In 2ND PADJADJARAN INTERNATIONAL PHYSICS SYMPOSIUM 2015 (PIPS-2015): Materials Functionalization and Energy Conservations. AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4941899.

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Pondee, B., and W. Thiemsorn. "Influences of pyrophyllite and CaO/K2O on phase transformation and properties of ceramic body and glaze for single firing." In THE SECOND MATERIALS RESEARCH SOCIETY OF THAILAND INTERNATIONAL CONFERENCE. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0023385.

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Reports on the topic "Pyrophylite"

1

Collings, R. K., and P. R. A. Andrews. Talc and pyrophyllite. Natural Resources Canada/CMSS/Information Management, 1990. http://dx.doi.org/10.4095/328628.

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