29 results about "Muscovite" patented technology

The invention discloses a magnetic separation-flotation combined stepped deep iron removal method for granite tailings. According to the method, after granite tailings are subjected to ore grinding treatment, magnetic separation impurity removal, black and white mica ore removal through reverse flotation and fine ferrodolomite ore removal through reverse flotation are conducted in sequence, after the pH of reverse flotation tailings is adjusted, fluoride-free and acid-free separation is conducted, low-iron quartz concentrate and feldspar rough concentrate are obtained, the feldspar rough concentrate is subjected to regrinding and secondary magnetic separation impurity removal, and the low-iron quartz concentrate and the feldspar rough concentrate are obtained. And low-iron feldspar concentrate is obtained. According to the method, no strong acid is involved in the whole process, the technical problem that in the prior art, strong acid is introduced in quartz and feldspar flotation, and consequently waste water and waste liquid pollution is caused is fundamentally solved, and efficient and deep removal of iron impurities in the granite tailings is achieved through the magnetic separation pre-enrichment-three-section flotation separation-step deep iron removal technology. And the overall removal efficiency of the iron impurities is remarkably improved, and comprehensive utilization of granite tailings resources is achieved.

The invention provides a pegmatite type lithium ore prospecting method based on aviation hyperspectral remote sensing. The method comprises the following steps: step 1, inputting hyperspectral reflectivity data; step 2, calculating continuum removal data of a characteristic spectrum section; step 3, calculating a characteristic absorption wavelength position DL of the characteristic spectrum section; step 4, calculating the matching degree of the characteristic spectrum sections; 5, recognizing mineral end members; 6, inputting pegmatite vein distribution information; 7, delineating an abnormal pegmatite vein; and 8, delineating the lithium-containing pegmatite vein. The invention provides a muscovite and spodumene end member identification and lithium-containing pegmatite vein identification method, the fine identification of seven subclasses of muscovite can be realized, the identification of the subclasses in the existing aviation hyperspectral data is the most and finest, and meanwhile, the muscovite and spodumene information can be finely distinguished. Based on spodumene and muscovite information, the lithium-containing pegmatite vein can be rapidly screened from a large number of pegmatite veins, and therefore the prospecting efficiency of pegmatite type lithium ore is improved.

The invention discloses high-temperature underglaze Chinese red glaze as well as a preparation method and application thereof, and belongs to the technical field of ceramic high-temperature underglaze colored glaze materials. The high-temperature underglaze Chinese red glaze comprises a high-temperature red pigment, a glaze matrix and related additives, wherein the high-temperature red pigment comprises a base material and a coloring element and is a core coloring component of the Chinese red glaze; the glaze matrix comprises potassium feldspar, muscovite, quartz sand, boric acid and wollastonite, and can be fused at high temperature to form a transparent or semitransparent vitreous layer to wrap and protect the pigment and provide good glaze gloss and flatness at the same time; related additives comprise a shaping agent, a dispersing agent and a mineralizing agent, and the colored glaze processing property can be improved. In addition, the invention further provides a preparation method and a sintering process of the high-temperature underglaze Chinese red glaze, Chinese red can be sintered at the temperature of 1300-1400 DEG C, the glaze color is bright, the chroma is full, the color is normal, darkening and blackening are avoided, and the high artistic value and process practicability are achieved.

The application provides a beneficiation method for lithium extraction from iron lepidolite ore by magnetic suspension, which adopts a process flow of "high-gradient high-intensity magnetic separation pre-concentration-flotation recovery-flotation tailings returning to magnetic separation operation" to separate and recover the iron lepidolite, and the magnetic separation operation adopts a high-gradient magnetic separator to recover the iron lepidolite through one or more high-intensity magnetic separation operations and preliminarily separate the iron lepidolite from muscovite and other gangues; the magnetic products obtained through the magnetic separation operation are combined and subjected to flotation, and a high-efficiency iron lepidolite flotation collector LYP is used to obtain high-quality iron lepidolite concentrate; the flotation tailings are returned to the high-gradient magnetic separation operation, and finally the efficient separation of the iron lepidolite is realized. The application is a new beneficiation method for iron lepidolite ore, which is stable, efficient, has strong adaptability, good separation effect and high recovery index, and is suitable for popularization and application.

A precious metal leaching method includes providing a slurried feed, comprising (i) in the solid phase, a refractory sulfide-containing material, the material comprising at least about 0.05 oz / tonne of a precious metal, at least about 0.75 wt. % sulfides, optionally at least about 0.1 wt. % feldspar (i.e., muscovite), and at least 0.3 wt. % preg-robbing carbonaceous material; and oxidizing the sulfide-containing material at more than about 240° C. and super-atmospheric pressure to oxidize at least most of the carbonaceous material and optionally convert at least most of the sulfide sulfur to sulfate sulfur and form an oxidized precious metal-containing material, wherein at least one of the following is performed during oxidizing: maintaining a pH of at least about pH 1.5; maintaining at least about 98.5% of the feldspar (i.e., muscovite) in the solid phase; maintaining a dissolved cupric ion concentration of at least about 0.25 g / L; and maintaining the slurried feed under subcritical or supercritical water operating conditions.

A method of producing a hydraulic cement composition, comprising - providing a raw material that comprises > 18 wt.-% kaolinite, ≥ 15 wt.-% calcite and a combined content of muscovite and illite of < 20 wt.-%, - calcining the raw material to obtain a pozzolanic material, - mixing the pozzolanic material with Portland cement clinker so that the cement composition comprises > 50 wt.-% of the pozzolanic material and < 45 wt.-% of the Portland cement clinker.

The invention provides a citric acid-containing composite flotation inhibitor and a preparation process thereof, and belongs to the technical field of mineral separation. The preparation process comprises the steps of preparing the citric acid modified lignosulfonate, preparing the propyl gallate and preparing the composite flotation inhibitor. Carboxyl of citric acid is grafted to lignosulfonate molecules through esterification reaction to obtain citric acid modified lignosulfonate, and after the citric acid modified lignosulfonate is prepared into the composite flotation inhibitor, the composite flotation inhibitor can have multiple functions that sulfonic acid groups adsorb quartz / potassium feldspar and aromatic rings act on muscovite in a pi-pi mode; therefore, muscovite, potassium feldspar, quartz and other minerals are inhibited at the same time, effective separation of lepidolite and minerals is achieved, and the flotation recovery rate and recovery purity of lepidolite are improved.

A fire protection coating and a fire barrier coated article are provided that comprise an inorganic binder and at least one inorganic filler, wherein the inorganic binder is selected from potassium silicate, sodium silicate, or a combination thereof, and wherein the at least one inorganic filler is selected from kaolin clay, talc, mica, mullite, phlogopite, muscovite montmorillonite, smectite, bentonite, illite, chlorite, sepiolite, attapulgite, halloysite, vermiculite, laponite, rectorite, perlite, and combinations thereof. The fire barrier article comprises flame resistant substrate layer having a first major surface and a second major surface, and a fire protection coating disposed on the first major surface of the flame resistant substrate layer.

The invention belongs to the technical field of low-temperature vein ore deposit mineralization center positioning methods, and particularly relates to a low-temperature vein ore deposit mineralization center positioning method based on muscovite group minerals, which comprises the following steps of: collecting, analyzing and sorting regional geological data, and collecting geological characteristics, mineralization background, regional structure and metamorphic background of a mining area; analyzing muscovite cause types and determining mineralization conditions; field geological survey sampling and drilling rock core logging are carried out, surrounding rock alteration characteristics are observed, sampling and logging rock cores are recorded, and test samples are collected at intervals; the short-wave infrared spectrum technology, the electronic probe technology and the laser Raman spectrum technology are creatively integrated, classification characterization and multi-dimensional data mining are carried out on muscovite family minerals, key parameters such as Pos2200, ISM values and Raman peak displacement of the muscovite family minerals are extracted, muscovite types related to and unrelated to the minerals can be effectively distinguished, invalid indication information is eliminated, and the mining quality is improved. The positioning precision of the concealed ore body is remarkably improved, and the problems that relevance interpretation is insufficient and positioning is fuzzy in a traditional single technical means are solved.

The invention relates to the technical field of domestic ceramics, and discloses a domestic ceramic with an antibacterial function and a manufacturing process thereof.The domestic ceramic comprises a ceramic body and a glaze layer, the glaze layer is formed by evenly glazing functional glaze on the surface of the ceramic body, and functional components are added into the functional glaze, so that the antibacterial performance is enhanced; the functional component is composed of glucose-coated copper-loaded expanded muscovite, in the roasting process, glucose carbonization provides a carbon source and reacts with components in the functional glaze to generate zirconium boride and silicon carbide capable of enhancing the hardness, fracture toughness and bending strength of a glaze surface layer, and meanwhile, the lamellar structure of the expanded muscovite is exposed; the copper ions can be slowly released, so that the domestic ceramic prepared by the invention has high strength and excellent antibacterial property, and has a wide application prospect.

The present application relates to a kind of low-grade iron lepidolite ore flotation pre-concentration-magnetic separation upgrading method, belong to mineral processing technical field.The present application carries out coarse grinding, slurry conditioning to low-grade iron lepidolite ore, under the synergistic effect of combined reagent and flotation column, using two times flotation column roughing, can efficiently recover iron lepidolite in ore, then the lithium rough concentrate obtained by flotation is defoamed, and is finely ground, and it is enriched again by high gradient magnetic separation, i.e. high-quality lithium concentrate can be obtained.The flotation pre-concentration process used in the present application only includes two roughing operations, no cleaning and scavenging operations, and does not involve middlings return, which can avoid the circulation of slime in the flotation system, and using flotation column as a separation device can improve the pre-concentration effect of micro-fine particle grade iron lepidolite, greatly reducing the ore processing capacity and energy consumption of subsequent process;Using high gradient magnetic separation can effectively separate iron lepidolite ore and gangue minerals such as muscovite, which is fully dissociated by fine grinding process, to realize lithium concentrate upgrading and impurity reduction.

The invention relates to the technical field of sludge resource utilization, in particular to a method for preparing an active mixed material through high-temperature calcination of sludge-based solid waste, which comprises the following steps: S1, raw material mixing: mixing 14-16% of carbide slag, 2-3% of phosphogypsum and the balance of sludge powder for 15-20 minutes in percentage by mass to obtain co-doped sludge; s2, high-temperature calcination: calcining the co-doped sludge obtained in S1 according to a calcining method as follows: heating to 780-785 DEG C at a rate of 6-8 DEG C / min, then heating to 880-885 DEG C at a rate of 2-4 DEG C / min, preserving heat for 25-35 min, naturally cooling in a furnace to room temperature after heat preservation is finished, and taking out to obtain calcined sludge; according to the method, the sludge is calcined, crystal structures of quartz and muscovite in the sludge are partially destroyed, amorphous silicon-aluminum components are generated, the microstructure is loose and porous, the porosity is increased, the volcanic ash activity is remarkably improved, CSG and PG are doped into the sludge, decomposition of the quartz and the muscovite is further promoted, and the gelling activity of the calcined sludge is improved.

The invention provides a method for determining a saturated crystallization process of spodumene in pegmatite, and belongs to the crossing field of rare metal ore deposit science and mineral in-situ analysis. According to the method, after a sample is collected and prepared into a probe piece, a saturated crystallization potential microcell is locked through muscovite oriented lithofacies-composition characterization; dividing a spodumene core-mantle-edge structure by means of the color cold cathode luminescence image girdle characteristics, and adjusting beam spots according to the girdle width to carry out LA-ICP-MS in-situ analysis; and finally, establishing a muscovite Ta / Nb ratio-spodumene Fe / Mn ratio synchronous response model, and accurately judging the saturated crystallization process. The method breaks through the limitation of single mineral analysis, solves the problems of inaccurate and non-systematic judgment in the prior art, and provides reliable technical support for pegmatite lithium mineralization research.

The invention relates to a flotation pre-enrichment-magnetic separation upgrading method for low-grade iron lepidolite ore, and belongs to the technical field of mineral processing. According to the method, low-grade iron lepidolite ore is subjected to coarse grinding and size mixing, iron lepidolite in the ore can be efficiently recycled through two times of flotation column roughing under the synergistic effect of a combined reagent and a flotation column, then lithium rough concentrate obtained through flotation is subjected to defoaming and fine grinding treatment, the lithium rough concentrate is enriched again through high-gradient magnetic separation, and iron lepidolite is obtained. And high-quality lithium concentrate can be obtained. The flotation pre-enrichment process adopted by the invention only comprises two times of roughing operation, does not have fine selection and scavenging operation, does not involve middling return, can prevent slime from circulating in a flotation system, and can improve the pre-enrichment effect of the micro-fine-particle-grade iron lepidolite by adopting a flotation column as separation equipment, so that the ore handling capacity and energy consumption of the subsequent process are greatly reduced; high-gradient magnetic separation is adopted, so that the lepidolite ore fully dissociated by a fine grinding process can be effectively separated from gangue minerals such as muscovite, and quality improvement and impurity reduction of lithium concentrate are realized.

The present invention discloses a method for magnetic separation and flotation combined with step-by-step deep iron removal of granite tailings. According to the method, granite tailings are subjected to grinding treatment, followed by magnetic separation for impurity removal, reverse flotation for removal of black and white mica ore, and reverse flotation for removal of fine-grained ankerite ore. After the pH of the reverse flotation tailings is adjusted, fluorine-free and acid-free separation is performed to obtain low-iron quartz concentrate and feldspar coarse concentrate. The feldspar coarse concentrate is regrinded and subjected to secondary magnetic separation for impurity removal to obtain low-iron feldspar concentrate. The method provided by the present invention does not involve strong acid throughout the entire process, fundamentally solving the technical problem of wastewater and waste liquid pollution caused by the introduction of strong acid in the flotation of quartz and feldspar in the prior art. The method also achieves efficient and deep removal of iron impurities in granite tailings through the magnetic pre-enrichment-three-stage flotation separation-step-by-step deep iron removal process, significantly improving the overall removal efficiency of iron impurities and realizing the comprehensive resource utilization of granite tailings.

The invention relates to a method for testing the content of free mica in machine-made sandstone powder, which comprises the following steps: pre-treating machine-made sand, and plating a carbon layer on the surface of a pre-treated sample; performing grating type point-by-point scanning on the surface of the prepared sample to generate and obtain a high-resolution back scattering image; calculating the area of stone powder particles according to the back scattering image, and calculating the area of a mica particle region to obtain the content of free mica in the stone powder; performing EDS scanning on the range of the free mica particles to obtain an X-ray spectrum, and analyzing the X-ray spectrum through software to generate a multicolor layered element diagram; and combining the element diagrams to generate a multicolor layered energy dispersion spectrum element diagram, calculating the area of a corresponding region according to the monochromatic energy dispersion spectrum diagram of the potassium element, calculating the area of a corresponding region according to the monochromatic energy dispersion spectrum diagram of the magnesium element, and further calculating the content of free muscovite and the content of other free mica.

The invention relates to the technical field of mica piece preparation, in particular to a low-cost preparation process of a high-strength mica column. The invention relates to a low-cost preparation process of a high-strength mica column, which comprises the following steps: preparing mica slurry from 15.0-37.5 parts of organic silica gel with the solid content of 40-60wt%, 0.1-0.5 part of potassium titanate whisker, 0.4-0.6 part of coupling agent, 5-20 parts of hollow glass powder and 65.0-91.5 parts of white mica powder, casting the mica slurry into a forming mold, heating to remove an organic solvent in the mica slurry, and preparing the high-strength mica column at 120-160 DEG C and normal pressure to obtain the high-strength mica column. Carrying out pre-hot press molding for 240-360 seconds under the pressure of 5-20 MPa to obtain a prefabricated mica column, and carrying out hot press molding for 600-900 seconds under the pressure of 30-60 MPa at the temperature of 120-160 DEG C and vacuumizing to obtain a finished product mica column. The mica column provided by the invention has good flame-retardant and heat-insulating properties, insulation and breakdown resistance, and also has good bending strength and impact toughness.

A precious metal leaching method includes providing a slurried feed, comprising (i) in the solid phase, a refractory sulfide-containing material, the material comprising at least about 0.05 oz / tonne of a precious metal, at least about 0.75 wt. % sulfides, optionally at least about 0.1 wt. % feldspar (i.e., muscovite), and at least 0.3 wt. % preg-robbing carbonaceous material; and oxidizing the sulfide-containing material at more than about 240° C. and super-atmospheric pressure to oxidize at least most of the carbonaceous material and optionally convert at least most of the sulfide sulfur to sulfate sulfur and form an oxidized precious metal-containing material, wherein at least one of the following is performed during oxidizing: maintaining a pH of at least about pH 1.5; maintaining at least about 98.5% of the feldspar (i.e., muscovite) in the solid phase; maintaining a dissolved cupric ion concentration of at least about 0.25 g / L; and maintaining the slurried feed under subcritical or supercritical water operating conditions.

The invention relates to the field of filler dispersion processes, and discloses a filler dispersion process for improving the thermal stability of an organic silicon insulating material, which comprises the following steps: S1, filler screening and characterization: screening at least two high-temperature-resistant fillers from hexagonal boron nitride, muscovite and phlogopite based on the microscopic characteristics of the fillers, the type, the particle size, the morphology and the crystal structure of the filler are systematically characterized; s2, surface chemical modification: carrying out surface chemical modification on the screened filler, and enhancing the interface bonding force between the filler and an organic silicon matrix through coupling agent treatment or functional modification; s3, multi-component filler synergistic dispersion; s4, optimizing process parameters; and S5, forming the composite material. Compared with the prior art, the process has the advantages that through systematic filler screening, surface modification and dispersion process control, uniform dispersion and firm interface bonding of the filler in an organic silicon matrix are achieved, and therefore the thermal stability of the composite material is remarkably improved.

The application discloses a kind of composite cementitious material and its preparation method, belong to industrial solid waste resource utilization and low-carbon cementitious material technical field;The method comprises: after kaolinite-muscovite type coal gangue powder is calcined in 900~980 ℃ in suspension system for 10~20s, air quenching is obtained, and the strength activity index of activated coal gangue is 75%~98%;Cement clinker, activated coal gangue, limestone, silica fume, fly ash and gypsum are mixed in proportion, wherein the mass ratio of silica fume and fly ash is 1:1~1:3;Grinding to specific surface area 300~380m² / kg, obtain composite cementitious material;The application is through the early age of silica fume and fly ash of later period of volcanic ash activity and hydration synergistic effect, combined with multi-component particle size distribution optimization effect, significantly improve the mechanical properties of cementitious material, 28d compressive strength can reach 48.3MPa at most, porosity is reduced to 13% or less, realizes that kaolinite-muscovite type coal gangue content reaches 30%~45% efficient utilization.

Provided are a sheet and a sealing material that are based on clay and are excellent in an electrical insulating property in a high-temperature environment. A sheet, containing: a first component as a main component; and a second component optionally, in which the first component is clay, a diameter change rate is 10% or less, as thermal dimensional stability, when a weight of the entire sheet is 100% by weight, a content of iron oxide is 6% by weight or less, the second component is a filling material, when the weight of the entire sheet is 100% by weight, a sum of the first component and the second component is 90% by weight or more, and the first component : the second component = 20 : 80 to 100 : 0 is set, and a sealing material containing the sheet. In this case, the swelling clay is swelling muscovite, and in the swelling muscovite, at least a part of K+ ions in an interlayer of the muscovite is exchanged with Li+ ions. In addition, the second component is a filling material of clay or an oxide.

An electrical cable for use as a substitute for mineral-insulated cables in nuclear facilities is described herein. The cable may include at least one conductor, insulation, a jacket, and an armor shell. In some embodiments, the conductor may comprise a stranded conductor of one of various grades. The insulation may comprise phlogopite or muscovite mica tape that may be helically or longitudinally applied in overlapping concentric layers around at least one conductor. The jacket may comprise a woven glass braid applied over insulation surrounding one or multiple conductors. The armor may comprise hermitically sealed metallic armor applied around the other components of the cable, thereby forming an exterior of the cable. The inorganic materials utilized may be configured to limit the creation of adverse and / or undesirable elements instigated by transmutation from neutron irradiation exposure.

A thermally insulating mount (3) for fastening a front part of a building to a supporting structure comprises the following components: a) a base part (4), which has a base area (5.1) for stably bearing against the supporting structure and a spacer-plate holder (7) perpendicular to the base area (5.1); b) a spacer plate (9) made of a thermally insulating material, wherein the spacer plate has an inner end region and an outer end region and wherein the inner end region (9.1) of the spacer plate (9) has at least two through-holes; c) at least two pin connections (8.1, 8.2), which each pass through one of the at least two holes and provide a mechanically load-bearing connection between the spacer-plate holder (7) of the base part (4) and the spacer plate (9). The spacer plate (9) is a laminate consisting substantially of muscovite-mica paper layers, for ensuring a high tensile strength of the laminate, and of silicon resin binder in the form of a matrix, for fixedly connecting the mica paper layers in the laminate.

The efficient separation method comprises the following steps that the low-grade iron lepidolite ore with the lithium oxide grade being 0.1%-0.3% is taken, the low-grade iron lepidolite ore with the lithium oxide grade being 0.1%-0.3% is crushed and then coarsely ground till the particle size is-0.6 mm, coarsely ground ore is obtained, and the proportion of the coarsely ground ore with the particle size being-0.6 mm + 0.3 mm is 50%-55%; modified water glass is adopted for stirring and dispersing the roughly-ground minerals, then a high-background magnetic separator with the background magnetic field intensity being 2-4 T is adopted for first-stage magnetic separation pre-enrichment, lepidolite rough concentrate is obtained, and tailing materials are removed; and regrinding the lepidolite rough concentrate product to obtain reground minerals, and carrying out flotation purification on the reground minerals to obtain a lepidolite flotation concentrate product and a flotation tailing product. After rough grinding, a high-background magnetic field strong magnetic separation method is adopted for pre-enrichment, a large number of siliceous nonmetallic minerals such as muscovite, sericite, quartz and feldspar with the surface properties similar to those of lepidolite are removed, and the follow-up flotation operation handling capacity and reagent cost are reduced.

The invention provides a method for flotation recovery of rubidium from gold ore preselection tailings, and belongs to the technical field of mineral processing. According to the method provided by the invention, gold ore pre-selected tailings are used as raw materials, the content of Rb2O is higher than 0.1%, the main rubidium-containing mineral is muscovite, firstly, the raw materials are ground until-0.074 mm ore accounts for 80%-90%, under the conditions that the ore pulp concentration is 25%-35% and the pH is 2-5, a combined collecting agent composed of dodecyl ether amine and potassium monoalkyl ether phosphate according to the mass ratio of (3-5): 1 is adopted for carrying out a flotation process of one-time roughing, two-time concentration and two-time scavenging, and the flotation process is completed. And the rubidium-containing muscovite concentrate is obtained. According to the method, rubidium resources are efficiently and economically recycled from the low-grade gold mine tailings, the process technology is reliable, and operation is easy; and the method has the characteristics of no pollution to the environment, low energy consumption, low investment and low treatment cost.

The present invention relates to a method for manufacturing a silico-calcareous mineral filler, the filler comprising the following compounds per 100% by weight: CaCo3: 50%; SiO2: 25%; Al2Si2O5(OH)4 (kaolinite): 10%; KAl2(AlSi3O10)(OH)2 (muscovite): 10%; and MgCO3, Fe3O4, CaSO4.2H2O: 5%.

The invention relates to the technical field of casting powder, in particular to low-alkalinity high-crystallization casting powder for nib steel, which comprises the following raw materials: a pre-melting material, aluminum activated wollastonite, modified fluorite, cryolite, carbon nanotube composite graphite, sodium carboxymethyl cellulose and magnesia. According to the method, the modified fluorite is calcined to generate the composite fluoride, F <-> is gradually released at high temperature, and sudden viscosity reduction caused by rapid fluorine release of traditional fluorite is avoided, so that the thickness of a slag lubricating layer is stabilized, and the steel breakout risk is reduced; meanwhile, the introduced Na < + > serves as a strong network regulator, a network structure formed by silica tetrahedrons is effectively broken, the melt polymerization degree is reduced, and therefore the viscosity and the melting point of the slag are reduced; the activity of CaO in the molten slag is indirectly influenced, and the actual alkalinity of a slag system can be reduced; in addition, K < + > in the muscovite is removed through acid pickling, active Al < 3 + > is released, and the active Al < 3 + > reacts with wollastonite to generate low-melting-point calcium aluminosilicate, so that the content of effective CaO is reduced, and the alkalinity of a slag system is reduced.

The present invention provides a method for preparing 4N7 grade high-purity quartz sand from muscovite-type granite quartz. The method comprises the following steps: After sorting the quartz raw ore, quartz concentrate is obtained. The quartz concentrate is subjected to heating acid leaching, washing, and drying to obtain primary quartz sand; The primary quartz sand is calcined, quenched with normal-temperature water, and dried to obtain intermediate minerals; The intermediate minerals are added to an oxidizing or reducing system acid, first subjected to ultrasonic acid leaching at normal temperature, and then subjected to heating acid leaching to obtain a leaching solution and leaching residues; The leaching residues are ultrasonically washed and dried to obtain 4N7 grade high-purity quartz sand. The method of the present invention can significantly reduce the content of impurity elements in muscovite-type granite quartz, and obtain a high-purity quartz sand product with SiO₂ ≥ 99.997%. The preparation method has simple process, low energy consumption, and is easy to operate. This method effectively solves the problem of difficult removal of fine-grained muscovite in the prior art.

The application relates to the technical field of remote sensing geological exploration, and particularly relates to a concealed fault geological structure feature extraction method, system, device and storage medium; the method comprises the following steps: acquiring hyperspectral remote sensing data corresponding to a to-be-detected geological area; pre-processing the hyperspectral remote sensing data to obtain surface reflectivity data; based on the surface reflectivity of the pixel in the first set wave band range, extracting a muscovite diagnostic absorption characteristic wavelength corresponding to the pixel; grading the muscovite diagnostic absorption characteristic wavelengths corresponding to each pixel respectively; for the pixels corresponding to muscovite diagnostic absorption characteristic wavelengths of different grades, different color information is given according to a preset mapping relationship, and a muscovite grid image is obtained; and abnormal color bands or linear boundaries between different colors are extracted from the muscovite grid image as concealed fault geological structure features of the to-be-detected geological area. The application realizes accurate extraction of concealed fault geological structure features and is more efficient.