CN112978733A - Preparation method of high-purity quartz sand for quartz tube production - Google Patents
Preparation method of high-purity quartz sand for quartz tube production Download PDFInfo
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 143
- 239000006004 Quartz sand Substances 0.000 title claims abstract description 68
- 239000010453 quartz Substances 0.000 title claims abstract description 65
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000002386 leaching Methods 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 16
- 238000005065 mining Methods 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 239000012634 fragment Substances 0.000 claims abstract description 5
- 230000009467 reduction Effects 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000002253 acid Substances 0.000 claims description 22
- 239000012535 impurity Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 18
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 18
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- 238000005201 scrubbing Methods 0.000 claims description 16
- 230000018044 dehydration Effects 0.000 claims description 15
- 238000006297 dehydration reaction Methods 0.000 claims description 15
- 238000010791 quenching Methods 0.000 claims description 14
- 230000000171 quenching effect Effects 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 11
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 229960001617 ethyl hydroxybenzoate Drugs 0.000 claims description 6
- 239000004403 ethyl p-hydroxybenzoate Substances 0.000 claims description 6
- 235000010228 ethyl p-hydroxybenzoate Nutrition 0.000 claims description 6
- NUVBSKCKDOMJSU-UHFFFAOYSA-N ethylparaben Chemical compound CCOC(=O)C1=CC=C(O)C=C1 NUVBSKCKDOMJSU-UHFFFAOYSA-N 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 235000006408 oxalic acid Nutrition 0.000 claims description 6
- 235000019353 potassium silicate Nutrition 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 6
- 239000012498 ultrapure water Substances 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 5
- -1 ethyl butyl Chemical group 0.000 claims description 4
- 229940005460 butyl levulinate Drugs 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 3
- 238000005202 decontamination Methods 0.000 claims description 3
- 230000003588 decontaminative effect Effects 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- AXMPPCGZGUAUBS-UHFFFAOYSA-N ethyl 2-(hexanoylamino)propanoate Chemical compound CCCCCC(=O)NC(C)C(=O)OCC AXMPPCGZGUAUBS-UHFFFAOYSA-N 0.000 claims description 3
- 238000007885 magnetic separation Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 49
- 230000008569 process Effects 0.000 abstract description 4
- 229910052681 coesite Inorganic materials 0.000 abstract description 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 229910052682 stishovite Inorganic materials 0.000 abstract description 2
- 229910052905 tridymite Inorganic materials 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 32
- 239000002245 particle Substances 0.000 description 6
- 239000011435 rock Substances 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 239000002734 clay mineral Substances 0.000 description 2
- 239000010433 feldspar Substances 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- KEQXNNJHMWSZHK-UHFFFAOYSA-L 1,3,2,4$l^{2}-dioxathiaplumbetane 2,2-dioxide Chemical compound [Pb+2].[O-]S([O-])(=O)=O KEQXNNJHMWSZHK-UHFFFAOYSA-L 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010423 industrial mineral Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011044 quartzite Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- 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
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a preparation method of high-purity quartz sand for quartz tube production, which comprises the following steps: s1, mining: the method comprises the steps of firstly mining from the interior of a quartz sand rough mine hole or an open pit through a mining machine, and then roughly breaking through a jaw crusher to prepare quartz fragments with the size of less than 50 cm. According to the preparation method of the high-purity quartz sand for quartz tube production, quartz sand rough ores are high in SiO2 content through physical pollution-free processing procedures such as crushing, washing, drying, cooling, crushing, leaching, iron removal, light color separation and the like, a roasting procedure is omitted, the process is simpler, energy conservation and consumption reduction are realized, environmental pollution is reduced, and the cost for producing quartz tubes is reduced.
Description
Technical Field
The invention relates to the field of high-purity quartz sand, in particular to a preparation method of high-purity quartz sand for quartz tube production.
Background
Quartz sand is quartz particles formed by crushing quartz stone, the quartz stone is a nonmetallic mineral substance and is a hard, wear-resistant and chemically stable silicate mineral, the color of the quartz sand is milk white or colorless and semitransparent, the Mohs hardness is 7, the quartz sand is an important industrial mineral raw material and a non-chemical dangerous product and is widely used in the industries of glass, casting, ceramics and fireproof materials, ferrosilicon smelting, metallurgical fusing agent, metallurgy, building, chemical industry, plastics, rubber, grinding materials, filter materials and the like, the quartz sand is a colorless and transparent quartz variety, Greek is called Krystallos and means white ice, the quartz sand is believed to be durable and firm ice, Chinese ancient people believe that the crystal containing cold in the mouth can be quenched, the quartz sandstone is consolidated clastic rock, the content of the quartz clastic is more than 95 percent, and is derived from various magma rocks, sedimentary rock and metamorphic rock, heavy mineral is less, associated mineral is feldspar, mica and clay mineral, quartzite is divided into two kinds of sedimentary cause and metamorphic cause, the boundary of the clastic particle and cementing material is not obvious in the former, the latter refers to quartz rock ore with deep metamorphic degree and pure quality, vein quartz is formed by hydrothermal effect, almost all quartz is composed of compact massive structure, mineral content in quartz sand is greatly changed, quartz is taken as the main, and feldspar, mica, rock fragment, heavy mineral, clay mineral and the like are taken as the secondary.
At present, high-purity quartz sand is prepared by diluting pure water and removing iron from the quartz sand by using an iron removal substance, so that most of quartz ore is absorbed along with the iron removal substance, the yield of the high-purity quartz sand is reduced, elements in the ore are changed through ion exchange, the purification efficiency is further reduced, the yield of the obtained high-purity quartz sand is relatively low through a series of steps such as acid washing, cooling and the like, the requirements of the acid washing and other steps on the field environment are relatively high, the price of the pure water is high, the purification of the quartz sand is not facilitated, and the effects of optimizing resources, protecting the environment and protecting the safety of workers cannot be achieved.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a preparation method of high-purity quartz sand for quartz tube production, which solves the problems of high price, environmental protection and worker safety and can effectively solve the problems in the background art.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a preparation method of high-purity quartz sand for quartz tube production comprises the following steps:
s1, mining: mining from the interior of a quartz sand rough mine hole or an open pit by a mining machine, and then roughly damaging by a jaw crusher to prepare quartz fragments below 50 cm;
s2, cleaning and decontamination: because certain soil and other substances such as soil are remained on the outer wall of the mined quartz block, the outer wall of the quartz block is cleaned by a high-pressure water gun, and the purity reduction of quartz sand caused by other substances is reduced;
s3, crushing: the method comprises the following steps of putting quartz blocks into a crusher, crushing the quartz blocks into quartz blocks of 15-40mm and 40-70mm and powder of less than 15mm by the crusher, respectively putting three types of quartz materials into a cone crusher to prepare gravel, and primarily screening the gravel by a vibration screening device to remove partial impurities;
s4, removing impurities: the gravel subjected to preliminary screening is put into a washing machine, a certain amount of impurities are conveniently removed by adding a scrubbing aid and water, after cleaning is completed, the gravel is conveyed into a dehydration device by using a fine sand pump to be dehydrated, after dehydration is completed, the gravel is dried by drying equipment, and after being cooled to room temperature, the gravel is subjected to magnetic separation, so that an iron removal effect is achieved;
s5, quenching treatment: putting the iron-removed quartz powder into a heating device for baking for 3-5 hours at the temperature of 1000-1400 ℃, and then adding a quenching solution for rapid quenching to obtain quartz powder;
s6, acid reaction: putting quartz powder into a reaction kettle, adding an acid solution into the reaction kettle for leaching, and performing auxiliary leaching by using a microwave device to perform solid-liquid separation;
s7, separation: the leaching solution is cleaned by ultrasonic waves, so that impurities coated on the surface can be dissolved in water, then the leaching solution is separated from the solution by a filtering device, and then the leaching solution is placed in a dehydration dryer for dehydration and drying, so that the moisture in the quartz sand is less than 0.0001%;
s8, light color contrast: and putting the dried quartz sand into a crawler-type photoelectric color selector, controlling the linear speed of a crawler at 0.6-1 m/s, adjusting the color selection precision and the belt contrast, selecting the ore with mixed colors, and leaving the high-purity quartz sand.
Preferably, the scouring aid comprises the following components in parts by weight: 3-5 parts of water glass, 0.2-0.8 part of surfactant, 1.3-1.5 parts of ethylparaben, 0.3-0.5 part of ethyl butyl levulinate and 7-18 parts of ultrapure water, wherein the preparation method of the scrubbing aid comprises the following steps: adding ultrapure water and ethyl butylacetamidopropionate into an autoclave under a vacuum condition, respectively adding ethylparaben, water glass and a surfactant, simultaneously heating to 55-75 ℃, stirring at 550r/min for 35-55min, heating to 90-100 ℃, stopping stirring, keeping the temperature for 2-4h, cooling, filtering and drying to obtain the scrubbing aid.
Preferably, the quenching solution is a sodium carbonate solution, a potassium carbonate solution, a sodium hydroxide solution or deionized water, the concentration of the sodium carbonate solution is 3-5 mol/L, the concentration of the potassium carbonate solution is 4-6 mol/L, and the concentration of the sodium hydroxide solution is 2-4 mol/L.
Preferably, the acid solution is a mixed acid of two or more of oxalic acid, phosphoric acid, acetic acid and hydrochloric acid; the concentration of oxalic acid in the acid solution is 3-5 wt%, the concentration of phosphoric acid is 4-6 wt%, the concentration of acetic acid is 2-4 wt%, and the concentration of hydrochloric acid is 3-6 wt%.
Preferably, the pressure range in the reaction kettle is 8.0-21.0 MPa.
Preferably, the dehydration drying treatment is to dry the dehydrated quartz sand for 10-20min at 110-130 ℃ by a roller dryer or a crawler dryer.
Preferably, the crushed quartz sand is subdivided by a classifying screen to obtain quartz sand with 4-120 meshes, and the liquid-solid ratio mL/g of the acid liquid to the quartz sand is 10: 1.
(III) advantageous effects
The invention provides a preparation method of high-purity quartz sand for quartz tube production, which has the following beneficial effects: the quartz sand rough ore is high in SiO2 content, can be violently impacted on quartz sand particles through ultrasonic scrubbing, and trace impurities on the surfaces of the quartz sand particles can be rapidly peeled off from the surfaces of the quartz sand particles and separated from the quartz sand under the action of scrubbing aids, the ultrasonic scrubbing process flow is short, the scrubbing effect is good and quick, water can be recycled, water resources are saved, through microwave-assisted leaching, the characteristics of microwave selective heating are utilized, so that ore pulp can better absorb the energy of microwaves and is rapidly heated, and an alkaline solution of a sodium carbonate solution, a potassium carbonate solution or a sodium hydroxide solution is adopted as a quenching solution, so that roasted quartz is instantly crushed into a micro-particle size and cracks are generated, impurities in the quartz rapidly react with the alkaline quenching solution to remove the impurities, the method has the advantages that the effect of removing impurities is improved, organic acid is used as acid leaching liquid, the reaction kettle generates pressure through microwave heating and temperature rising, cracks of a quartz matrix are further deepened, the acid leaching liquid can react with the impurities to remove the impurities more effectively through external field strengthening of microwaves, the preparation method can produce quartz sand with better quality than that of a roasting process, the Mohs hardness of the quartz sand reaches 7.5, the density of the quartz sand is 2.75, the melting point of the quartz sand is 1800 ℃, the purity of the quartz sand reaches 99.997-99.999%, the quality of the quartz sand is stable, and the requirement for manufacturing a quartz tube is completely met.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention relates to a preparation method of high-purity quartz sand for quartz tube production, in particular to a preparation method of high-purity quartz sand for quartz tube production, which comprises the following steps:
s1, mining: mining the quartz sand rough ore hole or the open pit from the inside of the quartz sand rough ore hole or the open pit by a mining machine, and then roughly damaging the quartz sand rough ore hole or the open pit by a jaw crusher to prepare quartz fragments with the particle size of less than 50 cm;
s2, cleaning and decontamination: because certain soil and other substances are remained on the outer wall of the mined quartz block, the outer wall of the quartz block is cleaned by a high-pressure water gun, and the purity reduction of quartz sand caused by other substances is reduced;
s3, crushing: putting the quartz blocks into a crusher, crushing the quartz blocks into quartz blocks of 15-40mm and 40-70mm and powder of less than 15mm by the crusher, respectively putting the three types of quartz materials into a cone crusher to prepare gravel, and primarily screening the gravel by a vibration screening device to remove partial impurities;
s4, removing impurities: putting the primarily screened gravel into a washing machine, adding a scrubbing aid and water to conveniently remove certain impurities, conveying the gravel into a dehydration device by using a fine sand pump to dehydrate after washing, drying the gravel by drying equipment after dehydration, cooling the gravel to room temperature, and performing magnetic separation to achieve an iron removal effect;
s5, quenching treatment: putting the iron-removed quartz powder into a heating device for baking for 3-5 hours at the temperature of 1000-1400 ℃, and then adding a quenching solution for rapid quenching to obtain quartz powder;
s6, acid reaction: putting quartz powder into a reaction kettle, adding an acid solution into the reaction kettle for leaching, and performing auxiliary leaching by using a microwave device to perform solid-liquid separation;
s7, separation: cleaning the leaching solution by ultrasonic waves to enable impurities coated on the surface to be dissolved in water, separating the leaching solution from the solution by a filtering device, and then putting the solution into a dehydration dryer for dehydration and drying to enable the water content in the quartz sand to be less than 0.0001%;
s8, light color contrast: and (3) placing the dried quartz sand into a crawler-type photoelectric color selector, controlling the linear speed of a crawler at 0.6-1 m/s, adjusting the color selection precision and the belt contrast, selecting the ore with mixed colors, and leaving the high-purity quartz sand.
Further, the scrubbing aid comprises the following components in parts by weight: 3-5 parts of water glass, 0.2-0.8 part of surfactant, 1.3-1.5 parts of ethylparaben, 0.3-0.5 part of ethyl butyl levulinate and 7-18 parts of ultrapure water, and the preparation method of the scrubbing aid comprises the following steps: adding ultrapure water and ethyl butylacetamidopropionate into an autoclave under a vacuum condition, respectively adding ethylparaben, water glass and a surfactant, simultaneously heating to 55-75 ℃, stirring at 550r/min for 35-55min, heating to 90-100 ℃, stopping stirring, keeping the temperature for 2-4h, cooling, filtering and drying to obtain the scrubbing aid, and increasing the efficiency.
Furthermore, the quenching solution is a sodium carbonate solution, a potassium carbonate solution, a sodium hydroxide solution or deionized water, the concentration of the sodium carbonate solution is 3-5 mol/L, the concentration of the potassium carbonate solution is 4-6 mol/L, and the concentration of the sodium hydroxide solution is 2-4 mol/L, so that the control is convenient.
Further, the acid solution is a mixed acid of two or more of oxalic acid, phosphoric acid, acetic acid and hydrochloric acid; the concentration of oxalic acid in the acid liquor is 3-5 wt%, the concentration of phosphoric acid is 4-6 wt%, the concentration of acetic acid is 2-4 wt%, and the concentration of hydrochloric acid is 3-6 wt%, so that the effect is improved.
Furthermore, the pressure range in the reaction kettle is 8.0-21.0 MPa, and the impurity removal effect is improved.
Further, the dehydration drying treatment is to dry the dehydrated quartz sand for 10-20min at 110-130 ℃ by a roller dryer or a crawler dryer, so as to increase the drying effect.
Further, the crushed quartz sand is subdivided by a classifying screen to obtain quartz sand with 4-120 meshes, and the liquid-solid ratio mL/g of acid liquor to the quartz sand is 10:1, so that the precision is improved.
The invention saves roasting process through physical pollution-free processing procedures of crushing, washing, drying, cooling, crushing, leaching, iron removal, light color selection and the like, has simpler process, realizes energy conservation and consumption reduction, reduces environmental pollution and reduces the cost for producing the quartz tube, and the scrubbing auxiliary agent, the sodium carbonate solution, the potassium carbonate solution or the sodium hydroxide solution and the organic acid are relatively safe reagents, thereby further protecting the safety of field work.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A preparation method of high-purity quartz sand for quartz tube production is characterized by comprising the following steps: the method comprises the following steps:
s1, mining: mining from the interior of a quartz sand rough mine hole or an open pit by a mining machine, and then roughly damaging by a jaw crusher to prepare quartz fragments below 50 cm;
s2, cleaning and decontamination: because certain soil and other substances such as soil are remained on the outer wall of the mined quartz block, the outer wall of the quartz block is cleaned by a high-pressure water gun, and the purity reduction of quartz sand caused by other substances is reduced;
s3, crushing: the method comprises the following steps of putting quartz blocks into a crusher, crushing the quartz blocks into quartz blocks of 15-40mm and 40-70mm and powder of less than 15mm by the crusher, respectively putting three types of quartz materials into a cone crusher to prepare gravel, and primarily screening the gravel by a vibration screening device to remove partial impurities;
s4, removing impurities: the gravel subjected to preliminary screening is put into a washing machine, a certain amount of impurities are conveniently removed by adding a scrubbing aid and water, after cleaning is completed, the gravel is conveyed into a dehydration device by using a fine sand pump to be dehydrated, after dehydration is completed, the gravel is dried by drying equipment, and after being cooled to room temperature, the gravel is subjected to magnetic separation, so that an iron removal effect is achieved;
s5, quenching treatment: putting the iron-removed quartz powder into a heating device for baking for 3-5 hours at the temperature of 1000-1400 ℃, and then adding a quenching solution for rapid quenching to obtain quartz powder;
s6, acid reaction: putting quartz powder into a reaction kettle, adding an acid solution into the reaction kettle for leaching, and performing auxiliary leaching by using a microwave device to perform solid-liquid separation;
s7, separation: the leaching solution is cleaned by ultrasonic waves, so that impurities coated on the surface can be dissolved in water, then the leaching solution is separated from the solution by a filtering device, and then the leaching solution is placed in a dehydration dryer for dehydration and drying, so that the moisture in the quartz sand is less than 0.0001%;
s8, light color contrast: and putting the dried quartz sand into a crawler-type photoelectric color selector, controlling the linear speed of a crawler at 0.6-1 m/s, adjusting the color selection precision and the belt contrast, selecting the ore with mixed colors, and leaving the high-purity quartz sand.
2. The method for preparing high-purity quartz sand for quartz tube production according to claim 1, wherein the method comprises the following steps: the scrubbing aid comprises the following components in parts by weight: 3-5 parts of water glass, 0.2-0.8 part of surfactant, 1.3-1.5 parts of ethylparaben, 0.3-0.5 part of ethyl butyl levulinate and 7-18 parts of ultrapure water, wherein the preparation method of the scrubbing aid comprises the following steps: adding ultrapure water and ethyl butylacetamidopropionate into an autoclave under a vacuum condition, respectively adding ethylparaben, water glass and a surfactant, simultaneously heating to 55-75 ℃, stirring at 550r/min for 35-55min, heating to 90-100 ℃, stopping stirring, keeping the temperature for 2-4h, cooling, filtering and drying to obtain the scrubbing aid.
3. The method for preparing high-purity quartz sand for quartz tube production according to claim 1, wherein the method comprises the following steps: the quenching solution is a sodium carbonate solution, a potassium carbonate solution, a sodium hydroxide solution or deionized water, the concentration of the sodium carbonate solution is 3-5 mol/L, the concentration of the potassium carbonate solution is 4-6 mol/L, and the concentration of the sodium hydroxide solution is 2-4 mol/L.
4. The method for preparing high-purity quartz sand for quartz tube production according to claim 1, wherein the method comprises the following steps: the acid solution is a mixed acid of two or more of oxalic acid, phosphoric acid, acetic acid and hydrochloric acid; the concentration of oxalic acid in the acid solution is 3-5 wt%, the concentration of phosphoric acid is 4-6 wt%, the concentration of acetic acid is 2-4 wt%, and the concentration of hydrochloric acid is 3-6 wt%.
5. The method for preparing high-purity quartz sand for quartz tube production according to claim 1, wherein the method comprises the following steps: the pressure range in the reaction kettle is 8.0-21.0 MPa.
6. The method for preparing high-purity quartz sand for quartz tube production according to claim 1, wherein the method comprises the following steps: the dehydration drying treatment is to dry the dehydrated quartz sand for 10-20min at the temperature of 110-.
7. The method for preparing high-purity quartz sand for quartz tube production according to claim 1, wherein the method comprises the following steps: and finely dividing the crushed quartz sand by a fine dividing sieve to obtain quartz sand with 4-120 meshes, wherein the liquid-solid ratio mL/g of the acid liquid to the quartz sand is 10: 1.
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| CN202110214759.XA CN112978733A (en) | 2021-02-25 | 2021-02-25 | Preparation method of high-purity quartz sand for quartz tube production |
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| CN114378026A (en) * | 2021-12-17 | 2022-04-22 | 中建材蚌埠玻璃工业设计研究院有限公司 | Method for preparing electronic grade high-purity quartz sand |
| CN115028170A (en) * | 2022-05-18 | 2022-09-09 | 天津臻泰科技有限公司 | Method for producing low-iron siliceous raw material by combined scrubbing of fluoride-free alkali and acid |
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| CN115028170A (en) * | 2022-05-18 | 2022-09-09 | 天津臻泰科技有限公司 | Method for producing low-iron siliceous raw material by combined scrubbing of fluoride-free alkali and acid |
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