CN115818651A - Processing and purifying process for high-purity quartz sand tailings - Google Patents
Processing and purifying process for high-purity quartz sand tailings Download PDFInfo
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- CN115818651A CN115818651A CN202211425481.1A CN202211425481A CN115818651A CN 115818651 A CN115818651 A CN 115818651A CN 202211425481 A CN202211425481 A CN 202211425481A CN 115818651 A CN115818651 A CN 115818651A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000006004 Quartz sand Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 238000005406 washing Methods 0.000 claims abstract description 31
- 238000001035 drying Methods 0.000 claims abstract description 26
- 238000012216 screening Methods 0.000 claims abstract description 18
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 239000003513 alkali Substances 0.000 claims abstract description 10
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 claims abstract description 7
- 229910000020 calcium bicarbonate Inorganic materials 0.000 claims abstract description 7
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 7
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 7
- 238000001354 calcination Methods 0.000 claims abstract description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 33
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 238000004140 cleaning Methods 0.000 claims description 17
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 239000012670 alkaline solution Substances 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 9
- 239000012153 distilled water Substances 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 5
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims description 5
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 235000006408 oxalic acid Nutrition 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 239000000276 potassium ferrocyanide Substances 0.000 claims description 4
- XOGGUFAVLNCTRS-UHFFFAOYSA-N tetrapotassium;iron(2+);hexacyanide Chemical compound [K+].[K+].[K+].[K+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] XOGGUFAVLNCTRS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract description 2
- 238000003837 high-temperature calcination Methods 0.000 abstract description 2
- 229910000040 hydrogen fluoride Inorganic materials 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000126 substance Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000010433 feldspar Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 229910052622 kaolinite Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 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
- 238000004891 communication Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 naHCO 3 Chemical compound 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- BYGOPQKDHGXNCD-UHFFFAOYSA-N tripotassium;iron(3+);hexacyanide Chemical compound [K+].[K+].[K+].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] BYGOPQKDHGXNCD-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Silicon Compounds (AREA)
Abstract
The invention discloses a processing and purifying process of high-purity quartz sand tailings, which comprises the following steps of S1, screening the quartz sand tailings; s2, calcining; s3, carrying out heat treatment and preheating treatment on the tailings, adopting input steam for preheating, wherein the temperature of the input steam is 101-111 ℃, and adding gaseous Cl after the heat treatment 2 Keeping the injection quantity of 3L per ton for 25-45min; s4, secondary screening is carried out on the tailings, and after screening is finished, alkaline washing treatment and drying are carried out; s5, carrying out acid washing treatment on the tailings subjected to alkali washing, and drying; s6, carrying out secondary heat treatment on the tailings. The invention processes and purifies the high-purity quartz sand tailings, and calcium bicarbonate and sodium bicarbonate are mixed in the high-temperature calcination process to remove metal impurities, so that the whole purification process is more environment-friendly due to the avoidance of hydrogen fluoride, and the adopted acid washing and alkali washing are more thorough, so that the content of the metal impurities in the tailings is lower, and the process is more environment-friendly.
Description
Technical Field
The invention relates to the technical field of quartz sand processing, in particular to a processing and purifying process for high-purity quartz sand tailings.
Background
Quartz sand is a hard, wear-resistant, chemically stable silicate mineral, the main chemical component of which is SiO 2 . The unique physical and chemical properties of the quartz sand enable the quartz sand to be widely applied to the traditional industries such as casting, metallurgy, rubber, grinding materials, ceramics, construction and the like, and play an irreplaceable role in the high and new technical fields such as aerospace, IT, communication, solar cells and the like, wherein the quartz sand which can be applied to the industries such as military industry, aerospace, optical fibers, chips, solar cells and the like generally requires SiO 2 High-purity quartz sand with the content higher than 99.9 percent.
The quartz sand tailings have more bubbles, the contents of elements such as iron, aluminum, magnesium, calcium and the like are higher, the elements form inclusion impurities in the quartz sand in the forms of oxides, feldspar, kaolinite, mica and the like and are difficult to remove, the conventional tailings treatment process cannot carry out efficient treatment on metal substances mixed in the tailings, and more pollution is easily generated in the treatment process, and a processing and purifying process for the high-purity quartz sand tailings is provided for solving the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a processing and purifying process for high-purity quartz sand tailings, which solves the problems that: the tailings of the quartz sand have more bubbles, the contents of elements such as iron, aluminum, magnesium, calcium and the like are higher, the elements form inclusion impurities in the quartz sand in the forms of oxides, feldspar, kaolinite, mica and the like and are difficult to remove, and the conventional tailings treatment process cannot effectively treat metal substances mixed in the tailings and is easy to cause more pollution in the treatment process.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a process for purifying high-purity quartz sand tailings comprises the following steps,
s1, screening quartz sand tailings, removing obvious impurities and foreign matters in the quartz sand tailings by using a 120-140-mesh screen, cleaning by using mixed liquor, and drying after cleaning;
s2, calcining: adding calcium bicarbonate and sodium bicarbonate with concentration of 2kg into each ton of tailings, and in the heating process, mixing and rotating the raw materials, wherein the rotating speed is 6rpm, the time lasts for 1.5h, and the temperature is controlled to be 120-680 ℃;
s3, carrying out heat treatment and preheating treatment on the tailings, adopting input steam for preheating, wherein the temperature of the input steam is 101-111 ℃, and adding gaseous Cl after the heat treatment 2 Keeping the injection quantity of 3L per ton, and the injection time is 25-45min;
s4, secondary screening is carried out on the tailings, and after screening is finished, alkaline washing treatment and drying are carried out;
s5, carrying out acid washing treatment on the tailings subjected to alkali washing, and drying;
and S6, carrying out secondary heat treatment on the tailings, fully cleaning the tailings by using deionized water after the heat treatment is finished, and drying the tailings to finish the processing.
In a further preferred embodiment of the present invention, in step S1, the mixed solution is sodium carbonate, potassium ferrocyanide, ethyl acetate, and distilled water, and the ratio of the amount of the mixed solution is 1.5:1, the volume fraction of the ethyl acetate is 90%.
As a further preferable mode of the invention, in step S2, the treated tailings need to be placed in a constant temperature drying oven, and are kept standing for 1 hour at 140 ℃, then cooled to normal temperature, and then washed with deionized water with a concentration of 85%.
As a further preferred mode of the present invention, in step S4, the alkaline solution is NaCL, KCL, naHCO 3 、KOH、KHCO 3 The pH value of the alkaline solution is controlled to be between 8 and 9.5.
As a further preferable mode of the present invention, in step S5, the step of acid washing includes heating to 90 ℃ with a 57% hydrochloric acid solution, treating for 2-3 hours, the hydrochloric acid amount being 8% of the weight of the raw material, washing the quartz sand with water, mixing concentrated hydrochloric acid and sulfuric acid (98%), standing at room temperature for 1-2 hours, mixing water, oxalic acid and copperas in a ratio of 3.
As a further preferable mode of the invention, the drying in the step S4 and the step S5 is to put the quartz sand tailings at 300-400 ℃ for 1.5 hours, so that the water content of the quartz sand tailings is not more than 0.05%.
In a more preferred embodiment of the present invention, the temperature of the secondary heat treatment in step S6 is controlled to be 750 to 850 ℃.
(III) advantageous effects
The invention provides a processing and purifying process for high-purity quartz sand tailings. The method has the following beneficial effects:
the invention processes and purifies the high-purity quartz sand tailings, and calcium bicarbonate and sodium bicarbonate are mixed in the high-temperature calcination process to remove metal impurities, so that the whole purification process is more environment-friendly due to the avoidance of hydrogen fluoride, and the adopted acid washing and alkali washing are more thorough, so that the content of the metal impurities in the tailings is lower, and the process is more environment-friendly.
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.
The invention provides a technical scheme that: a process for purifying high-purity quartz sand tailings comprises the following steps,
s1, screening quartz sand tailings, removing obvious impurities and foreign matters in the quartz sand tailings by using a 120-140-mesh screen, cleaning by using mixed liquor, and drying after cleaning;
s2, calcining: adding calcium bicarbonate and sodium bicarbonate with concentration of 2kg into each ton of tailings, and in the heating process, mixing and rotating the raw materials, wherein the rotating speed is 6rpm, the time lasts for 1.5h, and the temperature is controlled to be 120-680 ℃;
s3, carrying out heat treatment and preheating treatment on the tailings, adopting input steam for preheating, wherein the temperature of the input steam is 101-111 ℃, and adding gaseous Cl after the heat treatment 2 Keeping the injection quantity of 3L per ton, and the injection time is 25-45min;
s4, secondary screening is carried out on the tailings, and after screening is finished, alkaline washing treatment and drying are carried out;
s5, carrying out acid washing treatment on the tailings subjected to alkali washing, and drying;
and S6, carrying out secondary heat treatment on the tailings, fully cleaning the tailings by using deionized water after the heat treatment is finished, and drying the tailings to finish the processing.
In the step S1, the mixed solution is sodium carbonate, potassium ferrocyanide, ethyl acetate, and distilled water, and the dosage ratio is 1.5:1, the volume fraction of the ethyl acetate is 90%.
In the step S2, the treated tailings need to be placed in a constant-temperature drying oven, standing is carried out for 1 hour at the temperature of 140 ℃, then the temperature is reduced to the normal temperature, and then deionized water with the concentration of 85% is used for washing.
In step S4, the alkaline solution is NaCL, KCL and NaHCO 3 、KOH、KHCO 3 The pH value of the alkaline solution is controlled to be between 8 and 9.5.
As a further preferable mode of the present invention, in step S5, the step of acid washing includes heating to 90 ℃ with a 57% hydrochloric acid solution, treating for 2-3 hours, the hydrochloric acid amount being 8% of the weight of the raw material, washing the quartz sand with water, mixing concentrated hydrochloric acid and sulfuric acid (98%), standing at room temperature for 1-2 hours, mixing water, oxalic acid and copperas in a ratio of 3.
The drying in the step S4 and the step S5 is to place the quartz sand tailings at 300-400 ℃ for 1.5 hours, so that the water content of the quartz sand tailings is not more than 0.05 percent.
In step S6, the temperature of the secondary heat treatment is controlled between 750 ℃ and 850 ℃.
Example one
A process for purifying the high-purity quartz sand tailings includes such steps as screening the quartz sand tailings, sieving with 140-mesh sieve to remove impurities and impurities, and mixing the mixture of sodium carbonate and ferrous ironPotassium cyanide, ethyl acetate, distilled water, and the ratio of the amount of the potassium cyanide to the amount of the ethyl acetate is 1.5:1, washing the ethyl acetate by the volume fraction of 90%, and drying after washing; and (3) calcining: adding calcium bicarbonate and sodium bicarbonate with the concentration of 2kg into each ton of tailings, and in the heating process, mixing and rotating raw materials, wherein the rotating speed is 6rpm, the rotation speed lasts for 1.5h, the temperature is controlled to be 680 ℃, the treated tailings need to be placed in a constant-temperature drying box, standing is carried out for 1h under the condition of 140 ℃, then the temperature is reduced to the normal temperature, and then deionized water with the concentration of 85% is used for washing; heat treatment and preheating treatment are carried out on tailings, input steam is adopted for preheating, the temperature of the input steam is 111 ℃, and gaseous Cl is added after heat treatment 2 Keeping the injection quantity of 3L per ton, and the injection time is 45min; secondary screening is carried out on the tailings, alkali washing treatment is carried out after screening is finished, and the alkaline solution is NaCL, KCL and NaHCO 3 、KOH、KHCO 3 The pH value of the alkaline solution is controlled to be 9.5, and the quartz sand tailings are placed at 400 ℃ for 1.5 hours, so that the water content of the quartz sand tailings is not more than 0.05 percent; carrying out acid cleaning treatment on the tailings after alkali cleaning, heating to 90 ℃ by using a 57% hydrochloric acid solution, treating for 3 hours, wherein the hydrochloric acid accounts for 8% of the weight of the raw materials, washing quartz sand, mixing concentrated hydrochloric acid and sulfuric acid (98%), standing for 2 hours at room temperature, preparing water, oxalic acid and copperas into a solution according to a ratio of 3; and (3) carrying out secondary heat treatment on the tailings, controlling the temperature to be 850 ℃, fully cleaning the tailings by using deionized water after the heat treatment is finished, and drying the tailings to finish the processing.
Example two
A process for purifying the high-purity quartz sand tailings includes such steps as screening the quartz sand tailings with 120-mesh sieveScreening to remove obvious impurities and foreign matters in the quartz sand tailings, and then using mixed liquor, wherein the mixed liquor is sodium carbonate, potassium ferrocyanide, ethyl acetate and distilled water, and the dosage ratio is 1.5:1, cleaning the ethyl acetate by the volume fraction of 90%, and drying after cleaning; and (3) calcining: adding calcium bicarbonate and sodium bicarbonate with the concentration of 2kg into each ton of tailings, and in the heating process, mixing and rotating raw materials, keeping the rotation speed at 6rpm for 1.5 hours, controlling the temperature at 120 ℃, placing the treated tailings in a constant-temperature drying box, standing for 1 hour at the temperature of 140 ℃, then cooling to the normal temperature, and washing with deionized water with the concentration of 85%; carrying out heat treatment on tailings, preheating by adopting input steam, wherein the temperature of the input steam is 101 ℃, and adding gaseous Cl after the heat treatment 2 Keeping the injection quantity of 3L per ton, and the injection time is 25min; secondary screening is carried out on the tailings, alkali washing treatment is carried out after screening is finished, and the alkaline solution is NaCL, KCL and NaHCO 3 、KOH、KHCO 3 The pH value of the alkaline solution is controlled to be 8, and the quartz sand tailings are placed at the temperature of 300-400 ℃ for 1.5 hours, so that the water content of the quartz sand tailings is not more than 0.05 percent; carrying out acid cleaning treatment on the tailings after alkali cleaning, heating to 90 ℃ by using a 57% hydrochloric acid solution, treating for 2 hours, wherein the hydrochloric acid accounts for 8% of the weight of the raw materials, washing quartz sand, mixing concentrated hydrochloric acid and sulfuric acid (98%), standing for 1-2 hours at room temperature, preparing water, oxalic acid and green vitriol into a solution according to a ratio of 3; and (3) carrying out secondary heat treatment on the tailings, controlling the temperature to be 750 ℃, fully cleaning the tailings by using deionized water after the heat treatment is finished, and drying the tailings to finish the processing.
The comparative parameters of the product are tabulated below:
| silica content | Content of iron | |
| Example one | More than 99.6 percent | Less than 0.4 percent |
| Example two | More than 99.5 percent | Less than 0.5 percent |
。
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A processing and purifying process for high-purity quartz sand tailings is characterized by comprising the following steps: comprises the following steps of (a) carrying out the method,
s1, screening quartz sand tailings, removing obvious impurities and foreign matters in the quartz sand tailings by using a 120-140-mesh screen, cleaning by using mixed liquor, and drying after cleaning;
s2, calcining, namely adding calcium bicarbonate and sodium bicarbonate with the concentration of 2kg into each ton of tailings, and in the heating process, mixing and rotating the raw materials, wherein the rotating speed is 6rpm, the time lasts for 1.5h, and the temperature is controlled to be 120-680 ℃;
s3, carrying out heat treatment and preheating treatment on the tailings, adopting input steam for preheating, wherein the temperature of the input steam is 101-111 ℃, and adding gaseous Cl after the heat treatment 2 Keeping the injection quantity of 3L per ton, and the injection time is 25-45min;
s4, secondary screening is carried out on the tailings, and after screening is finished, alkaline washing treatment and drying are carried out;
s5, carrying out acid washing treatment on the tailings subjected to alkali washing, and drying;
and S6, carrying out secondary heat treatment on the tailings, fully cleaning the tailings by using deionized water after the heat treatment is finished, and drying the tailings to finish the processing.
2. The process for processing and purifying high-purity quartz sand tailings according to claim 1, wherein in the step S1, the mixed solution is sodium carbonate, potassium ferrocyanide, ethyl acetate and distilled water, and the ratio of the amount of the mixed solution to the amount of the distilled water is 1.5:1, the volume fraction of the ethyl acetate is 90%.
3. The process for processing and purifying high-purity quartz sand tailings as claimed in claim 1, wherein in the step S2, the treated tailings are placed in a constant-temperature drying box, kept standing at 140 ℃ for 1 hour, cooled to normal temperature, and washed with deionized water with a concentration of 85%.
4. The process for processing and purifying high-purity quartz sand tailings as claimed in claim 1, wherein the alkaline solution in the step S4 is NaCL, KCL or NaHCO 3 、KOH、KHCO 3 The pH value of the alkaline solution is controlled to be between 8 and 9.5.
5. The process for processing and purifying high-purity quartz sand tailings as claimed in claim 1, wherein in the step S5, the acid washing step comprises heating 57% hydrochloric acid solution to 90 ℃ for 2-3 hours, wherein the hydrochloric acid accounts for 8% of the weight of the raw materials, washing the quartz sand with water, mixing concentrated hydrochloric acid and sulfuric acid (98%), standing at room temperature for 1-2 hours, preparing water, oxalic acid and copperas into a solution according to a ratio of 3.
6. The process for processing and purifying high-purity quartz sand tailings as claimed in claim 1, wherein the drying in the steps S4 and S5 is performed by placing the quartz sand tailings at 300-400 ℃ for 1.5 hours, so that the water content of the quartz sand tailings is not more than 0.05%.
7. The process for processing and purifying high-purity quartz sand tailings as claimed in claim 1, wherein the temperature of the secondary heat treatment in the step S6 is controlled to be 750-850 ℃.
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| CN202211425481.1A CN115818651A (en) | 2022-11-14 | 2022-11-14 | Processing and purifying process for high-purity quartz sand tailings |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116874170A (en) * | 2023-06-14 | 2023-10-13 | 新沂市中鑫光电科技有限公司 | Method for preparing high-purity fused quartz by recycling waste quartz crucible |
| CN117567023A (en) * | 2024-01-16 | 2024-02-20 | 青州统一重工机械有限公司 | Production process for processing ultra-white sand by quartz sand |
| CN117843343A (en) * | 2023-12-26 | 2024-04-09 | 伟业陶瓷有限公司 | Recycling and reprocessing technology for waste materials generated in ceramic industry |
-
2022
- 2022-11-14 CN CN202211425481.1A patent/CN115818651A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116874170A (en) * | 2023-06-14 | 2023-10-13 | 新沂市中鑫光电科技有限公司 | Method for preparing high-purity fused quartz by recycling waste quartz crucible |
| CN117843343A (en) * | 2023-12-26 | 2024-04-09 | 伟业陶瓷有限公司 | Recycling and reprocessing technology for waste materials generated in ceramic industry |
| CN117567023A (en) * | 2024-01-16 | 2024-02-20 | 青州统一重工机械有限公司 | Production process for processing ultra-white sand by quartz sand |
| CN117567023B (en) * | 2024-01-16 | 2024-04-12 | 青州统一重工机械有限公司 | Production process for processing ultra-white sand by quartz sand |
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