Physicochemical studies of pyrophyllite of the Nikol’sk deposit

Абдрахимова, Е. С.

doi:10.1007/s11148-010-9244-2

Cited by 9 publications

(7 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of reflected light microscopy showed that the impurities are present in rare amounts and occur as very fine-grained, anhedral crystals disseminated in the rock following the foliation. Moreover, these impurities are evident in pyrite and hematite forms, which exist in pyrophyllite as oxide and sulfide minerals (Abdrakhimova ,2010;Bozkaya et al, 2007;Wiewióra et al ,1993).The results also indicated that detected disseminated pyrite is noted altered to hematite in the rim and within pyrite. Figure 3 shows high pyrite reflectance, white-gray color, and dissolved at the rim and within it to hematite (brown color).…”

Section: Microscopic Studies Resultsmentioning

confidence: 79%

“…Pyrophyllite is a phyllosilicate mineral comprised mainly of aluminum silicate hydroxide [Al 2 Si 4 O 10 (OH) 2 ] and is commonly found with other minerals such as talc and kaolinite, rutile, epidote, quartz, and mica (Abdrakhimova, 2010;Ali et al ,2021;Jeong et al, 2017;Kogel et al,2006)that will facilitate preparation of high quality acid-resistant materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Ali

2021

AGJSR

View full text Add to dashboard Cite

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.

show abstract

Section: Microscopic Studies Resultsmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

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

Ali

2021

AGJSR

View full text Add to dashboard Cite

show abstract

“…Moreover, several studies have used electrolysis, flotation, and electrification to remove sulfur, chlorine, iron, and titanium from non-metallic minerals [20,28,33]. For pyrophyllite, gravity separation techniques, flotation, magnetic separation, and leaching by ammonia and oxalic acid have been explored [1,8,18,28,34,35]. Furthermore, microwaves combined with sequential magnetic separation treatment have been used and considered as a promising method for upgrading low-grade pyrophyllite ore [19,36].…”

Section: Gradementioning

confidence: 99%

“…Pyrophyllite is a hydrous aluminum silicate with the chemical formula Al 2 Si 4 O 10 (OH) 2 and is commonly associated with other minerals such as quartz, mica, kaolinite, epidote, and rutile [1][2][3]. The pure pyrophyllite is composed of 28.3% Al 2 O 3 , 66.7% SiO 2 , and 5% H 2 O on weight bases [4].…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, when pyrophyllite is used in the ceramic industry, this mineral stains the product's surface due to the presence of these impurities [12,20]. Moreover, small amounts of iron lead to a decrease in the melting point of the refractory materials, affect the transparency of glass products, and reduce transmission in optical fibers [1,3,8]. Therefore, the most desirable percentage of iron in the pyrophyllite ore for use in industrial applications was determined in a previous study [8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pyrophyllite: An Economic Mineral for Different Industrial Applications

Ali

Ahmed

et al. 2021

Applied Sciences

View full text Add to dashboard Cite

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.

show abstract