Refractory Composites Based on Pyrophyllite Raw Materials

Shayakhmetov, U. Sh.; Shayakhmetov, A. U.; Захаров, А. В.; Khamidullin, A. R.; Gazizova, A. T.

doi:10.1007/s11148-018-0214-4

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…Furthermore, pyrophyllite is a poor conductor of electricity and has high dielectric strength. One of the most important properties of pyrophyllite is its natural hydrophobicity [45]. This property is used to produce many roofing products such as sealing and waterproof materials and asphalt felts.…”

Section: Physical Propertiesmentioning

confidence: 99%

“…For example, (1) pyrophyllite can be crushed, bonded to sodium silicate, formed into bricks, and fired and (2) small amounts of pyrophyllite can be combined with fireclay, zirconia, or bauxite to make high-alumina refractories. Refractory products made from pyrophyllite include tile refractories, cementfired bricks, fired brick-roofing tiles, and special refractories [45,58]. The specifications, grades, and properties of pyrophyllite required in the refractory industry are shown in Table 5.…”

Section: Pyrophyllite As a Refractory Materials Refractory Industrymentioning

confidence: 99%

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Pyrophyllite: An Economic Mineral for Different Industrial Applications

Ali

Ahmed

et al. 2021

Applied Sciences

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Pyrophyllite (Al2Si4O10(OH)2) is a phyllosilicate often associated with quartz, mica, kaolinite, epidote, and rutile minerals. In its pure state, pyrophyllite exhibits unique properties such as low thermal and electrical conductivity, high refractive behavior, low expansion coefficient, chemical inertness, and high resistance to corrosion by molten metals and gases. These properties make it desirable in different industries such as refractory; ceramic, fiberglass, and cosmetic industries; as filler in the paper, plastic, paint, and pesticide industries; as soil conditioner in the fertilizer industry; and as a dusting agent in the rubber and roofing industries. Pyrophyllite can also serve as an economical alternative in many industrial applications to different minerals as kaolinite, talc, and feldspar. To increase its market value, pyrophyllite must have high alumina (Al2O3) content, remain free of any impurities, and possess as much whiteness as possible. This paper presented a review of pyrophyllite’s industrial applications, its important exploitable properties, and the specifications required for its use in industry. It also presents the most effective and economical techniques for enriching low-grade pyrophyllite ores to make them suitable for various industrial applications.

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Section: Physical Propertiesmentioning

confidence: 99%

Section: Pyrophyllite As a Refractory Materials Refractory Industrymentioning

confidence: 99%

Pyrophyllite: An Economic Mineral for Different Industrial Applications

Ali

Ahmed

et al. 2021

Applied Sciences

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“…• Also, it is used to make tile refractories, cementfired bricks, fired brick-roofing, and special refractories. (Ali et al ,2021;Chen et al ,2017;Shayakhmetov et al, 2018;Shymanskaya, Dyatlova, and Popov, 2019;Truong et al ,2018)…”

Section: Industrymentioning

confidence: 99%

“…• Required size 150 -< 5 mm based on the type of product (Jena et al ,2015;Kogel et al, 2006;Pradhan et al, 2015;Shayakhmetov et al, 2018) Ceramic grade…”

Section: Table 2 Different Pyrophyllite Grades Specifications Smentioning

confidence: 99%

Chemical and Mineralogical Characterization of Saudi-Pyrophyllite ore and its Potential Applications

Ali

2021

AGJSR

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Purpose: Due to the importance of pyrophyllite as an economical alternative to several minerals such as kaolin, talc, and feldspar in different industrial applications, there is an intention in Saudi Arabia to exploit pyrophyllite in the industry. Since there were no sufficient studies conducted to characterize pyrophyllite in Saudi Arabia, this paper aims to study the chemical and mineralogical characterization of Saudi pyrophyllite ore grades and propose its potential applications besides proposing beneficiation strategies for the low-grade one. Method: In this study, two different grades pyrophyllite ore samples, from a pyrophyllite deposit in western Saudi Arabia, were characterized for their potential applications. Microscopic studies, X-ray fluorescence (XRF), scanning electron microscope coupled with energy dispersive X-ray (SEM-EDX), X-ray diffraction (XRD) were used for chemical and mineralogical characterization of the studied samples. Results: Microscope and XRD results have shown that the ore samples (labeled grade A and grade B) consist mainly of pyrophyllite associated with quartz and feldspar in addition to minor amounts of muscovite, chlorite, and siderite as impurity minerals. Moreover, the results indicated that the impurities are oxide and sulfide minerals (i.e., pyrite, hematite). According to XRF analysis results, grade A contains high alumina (27.03% Al2O3) and low iron (0.4% Fe2O3) whereas; grade B contains a high iron content (2.06% Fe2O3) and lower alumina (24.05 % Al2O2). It is predicted that the grade A with high alumina content can be used directly in fillers, refractories, fiberglass, whiteware ceramics, white cement, porcelain, and cosmetic applications. As for grade B, high iron content limits its industrial applications. Therefore, it needs to be treated to remove ferrous impurities before supply to pyrophyllite market. Conclusion: Based on analytical results, grade A with high alumina content can be used directly in fillers, refractories, fiberglass, whiteware ceramics, white cement, porcelain, and cosmetic applications. Furthermore, grade B needs to upgrade due to high iron content before being used in the industry.

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