CN112357925A - Purification process for quartz sand by using microorganisms - Google Patents
Purification process for quartz sand by using microorganisms Download PDFInfo
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- CN112357925A CN112357925A CN202011259064.5A CN202011259064A CN112357925A CN 112357925 A CN112357925 A CN 112357925A CN 202011259064 A CN202011259064 A CN 202011259064A CN 112357925 A CN112357925 A CN 112357925A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
- C01B33/037—Purification
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Abstract
The invention provides a purification process of quartz sand by using microorganisms, belonging to the technical field of quartz sand purification, and comprising the following processing steps of: (1) crushing: crushing and sieving a quartz sand raw material to obtain a material A; (2) water quenching: calcining the material A, and cooling in cold water after calcining to obtain a material B; (3) crushing: grinding the material B to obtain a material C; (4) flotation: adding a flotation agent into the material C for flotation to obtain a material D; (5) acid washing: adding the material D into the pickle liquor, separating the pickle liquor by a centrifugal machine, and drying to obtain a material E; (6) leaching microorganisms: and adding the material E into the microbial leaching solution, reacting for 3-5 days, filtering, washing with deionized water to be neutral, and drying to obtain a purified quartz sand product. The purification process of the quartz sand by using the microorganisms can purify iron contained in a quartz sand lattice, and can effectively improve the purification efficiency of the quartz sand.
Description
Technical Field
The invention belongs to the technical field of quartz sand purification, and particularly relates to a purification process of quartz sand by using microorganisms.
Background
The quartz sand is quartz particles formed by crushing and processing quartz stones. Quartz is a non-metallic mineral, a silicate mineral that is hard, wear resistant, and chemically stable. Quartz sand is an important industrial mineral raw material and a non-chemical hazardous article, and is widely used in the industries of glass, casting, ceramics and fireproof materials, ferrosilicon smelting, metallurgical flux, metallurgy, building, chemical engineering, plastics, rubber, grinding materials, filter materials and the like. The industrial quartz sand is lower and lower in raw material grade, and the grade of the industrial quartz sand can be improved through a mineral processing technology in order to meet industrial requirements. In the prior art, the purification of the quartz sand mainly comprises processes of magnetic separation, acid leaching and the like, but the purification efficiency of the technology for the quartz sand is limited, and only iron attached to the surface of the quartz sand can be removed, but iron contained in a lattice of the quartz sand cannot be removed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a purification process for quartz sand by using microorganisms, which can purify iron contained in a quartz sand lattice and effectively improve the purification efficiency of quartz sand.
In order to achieve the purpose, the invention is realized by the following technical scheme: a purification process for quartz sand by using microorganisms comprises the following processing steps:
(1) crushing: putting the quartz sand raw material into a crusher for crushing, and then sieving to obtain a material A with the particle size of 5-15 mm;
(2) water quenching: calcining the material A at 1300-1400 ℃, taking out the calcined material, placing the calcined material in cold water at 0-5 ℃ for rapid cooling, then heating the water to 40-65 ℃, stirring for 1.5-2.5 h, and filtering to obtain a material B;
(3) crushing: grinding the material B by a wet grinding method to prepare a material C with the particle size of 20-100 mu m;
(4) flotation: adding a flotation agent into the material C for flotation, adding dilute hydrochloric acid with the mass concentration of 5% to adjust the pH value to 1-3, stirring for 3-5 h, removing surface floating foam, filtering, and drying to obtain a material D;
(5) acid washing: adding the material D into an impregnation tank, keeping the impregnation tank dry, adding pickle liquor with the mass concentration of 5-10%, keeping the temperature of the impregnation tank at 45-75 ℃, stirring for 10-15 hours, separating the pickle liquor by using a centrifugal machine, and drying to obtain a material E;
(6) leaching microorganisms: sterilizing the material E in a high-pressure steam sterilization pot at 130 ℃ for 1 h, adding deionized water with the volume ratio of 1:1.5-2 into the sterilized material E to prepare mortar, adjusting the pH to 3-4.5 by using dilute hydrochloric acid with the mass concentration of 5%, then adding a microorganism leaching solution, carrying out oscillation reaction at 35 ℃ for 3-5 days at the oscillation speed of 160-200 r/min, then filtering, washing with deionized water to be neutral, and drying to obtain a purified quartz sand product. The water quenching can crack the minerals to remove bubbles, water marks and wrapped impurities in the minerals, quartz sand can generate crystal form transformation (alpha quartz → beta tridymite) during high-temperature calcination, so that the volume is increased, the original defect degree in the crystals becomes more serious, the crystal volume is suddenly reduced during water quenching, the internal stress at the crystal defect is rapidly increased to promote the crystals to break at the defect part, and the iron wrapped in the original quartz and the impurities in the cracks are exposed on the surfaces of the particles, so that the impurities can be conveniently removed in the subsequent processes; non-magnetic impurities can be removed by flotation; the acid leaching is mainly used for removing metal oxides and partial silicate minerals dissolved in acid and trace impurities such as easily-soluble aluminum, iron and the like in ores, most of the oxides and the impurity minerals are removed after roasting, water quenching and flotation, but partial oxides and impurity minerals are positioned in grain boundaries, microcracks and crystals, and long-time acid leaching is adopted to remove the impurities; the microorganism leaching can further remove the iron which is not removed in the previous working procedure through the microorganism, and the purification efficiency of the quartz sand can be ensured.
Further, the flotation agent in the step (4) comprises the following components in parts by mass: 40-60 parts of higher aliphatic amine salt and 35-50 parts of petroleum sodium sulfonate. The flotation effect can be improved by adopting the cation and anion mixed type collecting agent.
Further, the pickle liquor in the step (5) comprises the following components in parts by weight: 25-45 parts of sulfuric acid, 15-25 parts of hydrochloric acid, 20-40 parts of nitric acid and 5-10 parts of hydrofluoric acid. The acids have good removal effect on nonmetallic impurity minerals and iron in the quartz, and the hydrofluoric acid has a low concentration because the hydrofluoric acid has a high removal rate on the metallic impurities in consideration of the dissolving effect of the hydrofluoric acid on the quartz.
Further, the microorganisms in the microorganism leaching solution in the step (6) comprise aspergillus niger, penicillium, deep bacillus, geobacillus siderophicus and metal reducing bacteria in a quantity ratio of 2:1-2:1-1.5:1-1.5: 1.5-2.5. Aspergillus niger and Penicillium are fungi which can produce metabolic products such as oxalic acid and citric acid during the growth process, and the products can reduce insoluble ferric iron into soluble ferrous iron, thereby realizing the leaching of iron; the deep bacillus, the geobacillus ferrophilus and the metal reducing bacteria are bacteria, the bacteria can decompose organic matters under anaerobic conditions, and insoluble ferric iron can be reduced into soluble ferrous iron in the decomposition process, so that the leaching of iron is realized; the removal rate of the ferric oxide can be improved by matching fungi with bacteria.
Further, the preparation method of the microbial leaching solution comprises the following steps:
(1) preparation of a culture medium base solution: peeling and cleaning potatoes, cutting the potatoes into small pieces, putting the small pieces into a pot, adding water according to the proportion of 400 g/L of 300-;
(2) preparing a microbial leaching solution: sterilizing the culture medium base liquid in a high-pressure steam sterilization pot at 100 ℃ for 0.5 h, cooling to room temperature, adding 1-5 g of sterilized material E and 1-3 g of sterilized sulfur powder, inoculating microorganisms, adding a proper amount of 1-5% diluted hydrochloric acid to adjust the pH value to 3-5, keeping the temperature at 25-55 ℃, stirring at 70-85 r/min and keeping the ventilation quantity at 3-5L/min, and reacting for 7 days to obtain the microorganism leachate.
Further, the weight ratio of the added glucose to the water in the step (1) is as follows: 20-25: 1000.
further, the weight ratio of the added amount of the agar to the water in the step (1) is as follows: 15-20:1000.
Further, the microbial inoculum size in the step (2) is 1 × 103-5×105Spores per ml.
Has the advantages that: compared with the prior art, the invention has the following advantages: according to the purification process of the quartz sand by using the microorganisms, provided by the invention, through crystal form transformation (alpha quartz → beta tridymite) which can occur during high-temperature calcination, when water quenching is carried out, the volume of the crystal is suddenly reduced, the internal stress at the crystal defect is rapidly increased, so that the crystal is broken at the defect, and the iron wrapped inside in the original quartz and impurities in the cracks are exposed on the surface of the particles, so that the impurities can be conveniently removed by subsequent processes; the microorganism leaching can further remove the iron which is not removed in the previous working procedure through the microorganism, so that the purification efficiency of the quartz sand can be ensured; the removal rate of the ferric oxide can be improved by matching fungi with bacteria.
Drawings
FIG. 1 is a flow chart of a process for purifying quartz sand by using microorganisms according to the present invention.
Detailed Description
The invention is further illustrated by the accompanying drawings and specific examples.
Example 1
As shown in fig. 1, a process for purifying quartz sand by using microorganisms comprises the following processing steps:
(1) crushing: putting the quartz sand raw material into a crusher for crushing, and then sieving to obtain a material A with the particle size of 15 mm;
(2) water quenching: calcining the material A at 1300 ℃, taking out the calcined material, placing the calcined material in cold water at 0 ℃ for rapid cooling, then heating the water to 40 ℃, stirring for 1.5 h, and filtering to obtain a material B;
(3) crushing: grinding the material B by a wet grinding method to prepare a material C with the particle size of 100 mu m;
(4) flotation: adding a flotation agent into the material C for flotation, wherein the flotation agent comprises the following components in parts by mass: 40 parts of higher aliphatic amine salt and 35 parts of sodium petroleum sulfonate, adding dilute hydrochloric acid with the mass concentration of 5% to adjust the pH value to 1, stirring for 3 hours, removing surface floating foam, filtering, and drying to obtain a material D;
(5) acid washing: adding the material D into an impregnation tank, keeping the impregnation tank dry, and adding pickle liquor with the mass concentration of 5%, wherein the pickle liquor comprises the following components in parts by weight: 25 parts of sulfuric acid, 15 parts of hydrochloric acid, 20 parts of nitric acid and 5 parts of hydrofluoric acid, keeping the temperature of the dipping tank at 45 ℃, stirring for 10 hours, then separating the pickle liquor by a centrifugal machine, and drying to obtain a material E;
(6) leaching microorganisms: and (2) sterilizing the material E in a high-pressure steam sterilization pot at 130 ℃ for 1 h, adding deionized water with the volume ratio of 1:1.5 into the sterilized material E to prepare mortar, adjusting the pH to 3 by using dilute hydrochloric acid with the mass concentration of 5%, then adding a microbial leaching solution, carrying out oscillation reaction at 35 ℃ for 3 days at the oscillation speed of 160 r/min, then filtering, washing with deionized water to be neutral, and drying to obtain a purified quartz sand product.
The preparation method of the microbial leaching solution comprises the following steps:
(1) preparation of a culture medium base solution: peeling and cleaning potatoes, cutting the potatoes into small pieces, putting the small pieces into a pot, adding water according to the proportion of 300 g/L, heating the small pieces to boiling, boiling for 0.5 h, crushing the potatoes, stirring, filtering, adding glucose and agar into filtrate, wherein the weight ratio of the added glucose and agar to the water is as follows: 20: 15: 1000, heating to 45 ℃, continuously stirring, adding 0.5L of water after the agar is dissolved, and uniformly stirring to obtain a culture medium base solution;
(2) preparing a microbial leaching solution: sterilizing the culture medium base liquid in a high-pressure steam sterilization pot at 100 deg.C for 0.5 h, cooling to room temperature, adding 1 g of sterilized material E and 1 g of sterilized sulfur powder, and inoculating microorganism, wherein the microorganism comprises Aspergillus niger, Penicillium, deep bacillus, Geobacillus ferdii and metal reducing bacteria at a ratio of 2:1:1:1: 1.5, and the inoculation amount of the microorganism is 1 × 103-5×105Adding appropriate amount of 1% diluted hydrochloric acid into each spore/ml, adjusting pH to 3, maintaining temperature at 25 deg.C, stirring at 70 r/min, and maintaining ventilation at 3L/min, and reacting for 7 days to obtain microorganism leachate.
In this example, the removal rate of iron was 82%, wherein the content of silica was 99.9%, and the content of iron oxide was 0.006%.
Example 2
As shown in fig. 1, a process for purifying quartz sand by using microorganisms comprises the following processing steps:
(1) crushing: putting the quartz sand raw material into a crusher for crushing, and then sieving to obtain a material A with the particle size of 5 mm;
(2) water quenching: calcining the material A at 1400 ℃, taking out the calcined material, placing the calcined material in cold water at 0 ℃ for rapid cooling, then heating the water to 65 ℃, stirring for 2.5 hours, and filtering to obtain a material B;
(3) crushing: grinding the material B by a wet grinding method to prepare a material C with the particle size of 20 mu m;
(4) flotation: adding a flotation agent into the material C for flotation, wherein the flotation agent comprises the following components in parts by mass: 60 parts of higher aliphatic amine salt and 50 parts of sodium petroleum sulfonate, adding dilute hydrochloric acid with the mass concentration of 5% to adjust the pH value to 3, stirring for 5 hours, removing surface floating foam, filtering, and drying to obtain a material D;
(5) acid washing: adding the material D into an impregnation tank, keeping the impregnation tank dry, and adding acid leaching solution with the mass concentration of 10%, wherein the acid leaching solution comprises the following components in parts by weight: 45 parts of sulfuric acid, 25 parts of hydrochloric acid, 40 parts of nitric acid and 10 parts of hydrofluoric acid, keeping the temperature of the dipping tank at 75 ℃, stirring for 15 hours, then separating the pickle liquor by a centrifugal machine, and drying to obtain a material E;
(6) leaching microorganisms: and (2) sterilizing the material E in a high-pressure steam sterilization pot at 130 ℃ for 1 h, adding deionized water with the volume ratio of 1: 2 into the sterilized material E to prepare mortar, adjusting the pH to 4.5 by using dilute hydrochloric acid with the mass concentration of 5%, then adding a microbial leaching solution, carrying out oscillation reaction at 35 ℃ for 5 days at the oscillation speed of 200 r/min, then filtering, washing with deionized water to be neutral, and drying to obtain a purified quartz sand product.
The preparation method of the microbial leaching solution comprises the following steps:
(1) preparation of a culture medium base solution: peeling and cleaning potatoes, cutting the potatoes into small pieces, putting the small pieces into a pot, adding water according to the proportion of 400 g/L, heating the small pieces to boiling, boiling for 0.5 h, crushing the potatoes, stirring, filtering, adding glucose and agar into filtrate, wherein the weight ratio of the added glucose and agar to the water is 25: 20:1000, heating to 65 ℃, continuously stirring, adding 0.5L of water after the agar is dissolved, and uniformly stirring to obtain a culture medium base solution;
(2) preparing a microbial leaching solution: sterilizing the culture medium base liquid in a high-pressure steam sterilization pot at 100 deg.C for 0.5 h, cooling to room temperature, adding 5 g of sterilized material E and 3 g of sterilized sulfur powder, and inoculating microorganism, wherein the microorganism comprises Aspergillus niger, Penicillium, deep bacillus, Geobacillus ferrophilus and metal reducing bacteria at a ratio of 2: 2:1.5: 1.5: 2.5, and the inoculation amount of the microorganism is 1 × 103-5×105Adding appropriate amount of 5% dilute hydrochloric acid into each spore/ml, adjusting pH to 5, maintaining temperature at 55 deg.C, stirring at 85 r/min, and maintaining ventilation at 5L/min, and reacting for 7 days to obtain microorganism leachate;
in this example, the removal rate of iron was 93%, wherein the content of silica was 99.99%, and the content of iron oxide was 0.003%.
Example 3
As shown in fig. 1, a process for purifying quartz sand by using microorganisms comprises the following processing steps:
(1) crushing: putting the quartz sand raw material into a crusher for crushing, and then sieving to obtain a material A with the particle size of 10 mm;
(2) water quenching: calcining the material A at 1350 ℃, taking out the calcined material, quickly cooling the calcined material in cold water at 3 ℃, heating the water to 52 ℃, stirring for 2 hours, and filtering to obtain a material B;
(3) crushing: grinding the material B by a wet grinding method to prepare a material C with the particle size of 60 mu m;
(4) flotation: adding a flotation agent into the material C for flotation, wherein the flotation agent comprises the following components in parts by mass: 50 parts of higher aliphatic amine salt and 42 parts of sodium petroleum sulfonate, adding dilute hydrochloric acid with the mass concentration of 5% to adjust the pH value to 2, stirring for 4 hours, removing surface floating foam, filtering, and drying to obtain a material D;
(5) acid washing: adding the material D into an impregnation tank, keeping the impregnation tank dry, and adding acid leaching solution with the mass concentration of 7%, wherein the acid leaching solution comprises the following components in parts by weight: 35 parts of sulfuric acid, 20 parts of hydrochloric acid, 30 parts of nitric acid and 7 parts of hydrofluoric acid, keeping the temperature of the dipping tank at 60 ℃, stirring for 12 hours, then separating the pickle liquor by a centrifugal machine, and drying to obtain a material E;
(6) leaching microorganisms: and (2) sterilizing the material E in a high-pressure steam sterilization pot at 130 ℃ for 1 h, adding deionized water with the volume ratio of 1:1.7 into the sterilized material E to prepare mortar, adjusting the pH to 3.7 by using dilute hydrochloric acid with the mass concentration of 5%, then adding the microbial leaching solution, carrying out oscillation reaction at 35 ℃ for 4 days at the oscillation speed of 180 r/min, then filtering, washing with deionized water to be neutral, and drying to obtain a purified quartz sand product.
The preparation method of the microbial leaching solution comprises the following steps:
(1) preparation of a culture medium base solution: peeling and cleaning potatoes, cutting the potatoes into small pieces, putting the small pieces into a pot, adding water according to the proportion of 350 g/L, heating the small pieces to boiling, boiling for 0.5 h, crushing the potatoes, stirring, filtering, adding glucose and agar into filtrate, wherein the weight ratio of the added glucose and agar to the water is 22: 17: 1000, heating to 55 ℃, continuously stirring, adding 0.5L of water after the agar is dissolved, and uniformly stirring to obtain a culture medium base solution;
(2) preparing a microbial leaching solution: sterilizing the culture medium base liquid in a high pressure steam sterilizing pot at 100 deg.C for 0.5 h, cooling to room temperature, adding 3 g sterilized material E and 2 g sterilized sulfur powder, and inoculating microorganism with the inoculation amount of 1 × 103-5×105Each spore/ml, wherein the microorganisms in the microorganism leachate comprise aspergillus niger, penicillium, bacillus deepens, geobacillus ferrophilus and metal reducing bacteria in a quantity ratio of 2:1.5:1.7:1.2: 2, a proper amount of dilute hydrochloric acid with the mass concentration of 3% is added to adjust the pH of the microorganism leachate to be 4, the temperature is kept at 40 ℃, the stirring speed is 77 r/min, the ventilation volume is kept at 4L/min, and the microorganism leachate can be prepared after reaction for 7 days;
in this example, the removal rate of iron was 87%, wherein the content of silica was 99.93%, and the content of iron oxide was 0.005%.
The foregoing is directed to embodiments of the present invention and, more particularly, to a method and apparatus for controlling a power converter in a power converter, including a power converter, a power converter.
Claims (8)
1. A purification process for quartz sand by using microorganisms is characterized in that: the method comprises the following processing steps:
(1) crushing: putting the quartz sand raw material into a crusher for crushing, and then sieving to obtain a material A with the particle size of 5-15 mm;
(2) water quenching: calcining the material A at 1300-1400 ℃, taking out the calcined material, placing the calcined material in cold water at 0-5 ℃ for rapid cooling, then heating the water to 40-65 ℃, stirring for 1.5-2.5 h, and filtering to obtain a material B;
(3) crushing: grinding the material B by a wet grinding method to prepare a material C with the particle size of 20-100 mu m;
(4) flotation: adding a flotation agent into the material C for flotation, adding dilute hydrochloric acid with the mass concentration of 5% to adjust the pH value to 1-3, stirring for 3-5 h, removing surface floating foam, filtering, and drying to obtain a material D;
(5) acid washing: adding the material D into an impregnation tank, keeping the impregnation tank dry, adding pickle liquor with the mass concentration of 5-10%, keeping the temperature of the impregnation tank at 45-75 ℃, stirring for 10-15 hours, separating the pickle liquor by using a centrifugal machine, and drying to obtain a material E;
(6) leaching microorganisms: sterilizing the material E in a high-pressure steam sterilization pot at 130 ℃ for 1 h, adding deionized water with the volume ratio of 1:1.5-2 into the sterilized material E to prepare mortar, adjusting the pH to 3-4.5 by using dilute hydrochloric acid with the mass concentration of 5%, then adding a microorganism leaching solution, carrying out oscillation reaction at 35 ℃ for 3-5 days at the oscillation speed of 160-200 r/min, then filtering, washing with deionized water to be neutral, and drying to obtain a purified quartz sand product.
2. The process for purifying silica sand using microorganisms as claimed in claim 1, wherein: the flotation agent in the step (4) comprises the following components in parts by mass: 40-60 parts of higher aliphatic amine salt and 35-50 parts of petroleum sodium sulfonate.
3. The process for purifying silica sand using microorganisms as claimed in claim 1, wherein: the pickle liquor in the step (5) comprises the following components in parts by weight: 25-45 parts of sulfuric acid, 15-25 parts of hydrochloric acid, 20-40 parts of nitric acid and 5-10 parts of hydrofluoric acid.
4. The process for purifying silica sand using microorganisms as claimed in claim 3, wherein: the microorganisms in the microbial leaching solution in the step (6) comprise aspergillus niger, penicillium, deep bacillus, geobacillus ferrophilus and metal reducing bacteria in a quantity ratio of 2:1-2:1-1.5:1-1.5:1-1.5: 1.5-2.5.
5. The process for purifying silica sand using microorganisms according to claim 1 or 4, wherein: the preparation method of the microbial leaching solution comprises the following steps:
(1) preparation of a culture medium base solution: peeling and cleaning potatoes, cutting the potatoes into small pieces, putting the small pieces into a pot, adding water according to the proportion of 400 g/L of 300-;
(2) preparing a microbial leaching solution: sterilizing the culture medium base liquid in a high-pressure steam sterilization pot at 100 ℃ for 0.5 h, cooling to room temperature, adding 1-5 g of sterilized material E and 1-3 g of sterilized sulfur powder, inoculating microorganisms, adding a proper amount of 1-5% diluted hydrochloric acid to adjust the pH value to 3-5, keeping the temperature at 25-55 ℃, stirring at 70-85 r/min and keeping the ventilation quantity at 3-5L/min, and reacting for 7 days to obtain the microorganism leachate.
6. The process for purifying silica sand using microorganisms as claimed in claim 5, wherein: the weight ratio of the added glucose to the water in the step (1) is as follows: 20-25: 1000.
7. the process for purifying silica sand using microorganisms as claimed in claim 5, wherein: the weight ratio of the added amount of the agar to the water in the step (1) is as follows: 15-20:1000.
8. The process for purifying silica sand using microorganisms as claimed in claim 5, wherein: the microbial inoculation amount in the step (2) is 1 multiplied by 103-5×105Spores per ml.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4401638A (en) * | 1981-12-21 | 1983-08-30 | Materias Primas, Monterrey, S.A. | Process for purifying silica sand |
| CN102897993A (en) * | 2012-10-25 | 2013-01-30 | 中国地质大学（北京） | Method for preparing high-purity quartz sands by using natural vein quartz ores |
| CN103663465A (en) * | 2013-11-21 | 2014-03-26 | 成都兴能新材料有限公司 | Quartz sand purifying technology |
| CN105948062A (en) * | 2016-04-28 | 2016-09-21 | 江苏凯达石英有限公司 | Preparation method of highly pure quartz sands |
| CN106064819A (en) * | 2016-06-01 | 2016-11-02 | 安徽晶晶石英科技有限公司 | A kind of quartz deposit prepares the method for glass sand |
| CN110668453A (en) * | 2019-11-12 | 2020-01-10 | 东海县博汇新材料科技有限公司 | Method for purifying superfine silica powder by using microorganism mixed strain |
-
2020
- 2020-11-12 CN CN202011259064.5A patent/CN112357925A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4401638A (en) * | 1981-12-21 | 1983-08-30 | Materias Primas, Monterrey, S.A. | Process for purifying silica sand |
| CN102897993A (en) * | 2012-10-25 | 2013-01-30 | 中国地质大学（北京） | Method for preparing high-purity quartz sands by using natural vein quartz ores |
| CN103663465A (en) * | 2013-11-21 | 2014-03-26 | 成都兴能新材料有限公司 | Quartz sand purifying technology |
| CN105948062A (en) * | 2016-04-28 | 2016-09-21 | 江苏凯达石英有限公司 | Preparation method of highly pure quartz sands |
| CN106064819A (en) * | 2016-06-01 | 2016-11-02 | 安徽晶晶石英科技有限公司 | A kind of quartz deposit prepares the method for glass sand |
| CN110668453A (en) * | 2019-11-12 | 2020-01-10 | 东海县博汇新材料科技有限公司 | Method for purifying superfine silica powder by using microorganism mixed strain |
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