CN102730704B - Depth purification method for preparing silica powder by using quartz tailings - Google Patents
Depth purification method for preparing silica powder by using quartz tailings Download PDFInfo
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- CN102730704B CN102730704B CN201210233553.2A CN201210233553A CN102730704B CN 102730704 B CN102730704 B CN 102730704B CN 201210233553 A CN201210233553 A CN 201210233553A CN 102730704 B CN102730704 B CN 102730704B
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Abstract
The invention discloses a depth purification method for preparing silica powder by using quartz tailings which comprises the following steps of :(1) using hydrochloric acid or sulfuric acid to scrub the quartz tailings, (2) putting the scrubed sand into a dehydrator for liquid medicine removal treatment; (3) carrying out reverse flotation and purification, using oleic acid or sodium oleate as a flotation agent with the amount of 50-350g/t, using Na2CO3 or NaOH as a modifier and controlling the pH of flotation slurry in the range of 7.5-9.8, pumping the quartz tailings after the size mixing treatment and sending to a flotation machine for reverse flotation, wherein the mineral impurities of carbonate, mica and feldspar float in the form of foam and the qualified quartz tailings sand remain in the pulp. The advantages of the method provided by the invention lie in that the internal quality problem of quartz tailings sand existing in the process of comprehensive utilization a can be solved and the content of SiO2 can be increased to the high level of 99.5%-99.8%, meeting the requirement of internal quality of silica powder used as ceramic glaze, chemical filler, electric and electronic filler.
Description
Technical field
The present invention relates to the degree of depth method of purification of quartz tail sand fine sand, be applicable to the separated of quartzy tail (carefully) sand and the class mineral such as mica, carbonate, feldspar, can be by SiO
2content is brought up to 99.5% ~ 99.8% high level in the quality index of 96% ~ 99% quartzy tail (carefully) sand, meets the interior quality requirement of silicon powders for the industries such as ceramic glaze, chemical filler, electrotechnical, electronic filler.
Background technology
Quartz sand claims again silica sand, is the tradition such as glass, pottery, casting, water treatment, chemical industry, new forms of energy, electrotechnical, electronic, the aerospace basic raw material indispensable with new and high technology material industry.Siliceous raw material processing industry in order to meet the need of market, must be controlled the requirements such as the grain size distribution of the finished product and Chemical Composition simultaneously, conventionally can produce 20 ~ 35% undesirable quartzy tail (carefully) sand.The foreign matter contents such as this tail (carefully) sand Al, Fe, Ca, mud are higher, cannot in the industries such as glass fibre, pottery, chemical industry, filler silicon powder, apply.According to statistics, annual quartzy tail (carefully) the sand total amount of storing up in factory or depositing in tailing dam is about 30,000,000 t left and right.These wastes are thinner because of granularity, while blowing, wave with the wind and cause local " sandstorm "; During the rainy day, with rainwater outflow, silt river course and field up; When having a strong impact on environment, restricted the Sustainable development of enterprise.On the other hand, the high-quality konilite resource that the industries such as pottery, chemical industry, filler are badly in need of is day by day exhausted, and price rises steadily.Therefore, how quartz tail sand fine sand is carried out to degree of depth purification, the interior quality that improves quartz tail sand is the key that solves quartz tail sand problem of complex utilization.
Summary of the invention
How object of the present invention solves exactly the further deep processing to existing quartz tail sand fine sand and processes, to improve the interior quality of quartz tail sand, a kind of degree of depth method of purification of utilizing quartz tail sand to prepare silicon powder proposing, realize the effective separated of the class mineral such as quartzy and carbonate, mica, feldspar, make it meet the specification of quality of high-quality silicon powder raw material.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
(1) utilize hydrochloric acid or sulfuric acid to clean pre-treatment to quartz tail sand, clean concentration and be the ratio of the scouring liquor gross weight that 35% ~ 70%(refers to quartz tail sand weight and comprise quartz tail sand) between, the scouring time is 5 ~ 60min, sour consumption is between 10 ~ 100kg/t;
(2) above-mentioned scouring sand is put into dehydration bucket and carried out reagent removal water treatment, liquid medicine can be recycled;
Through scouring and reagent removal processing, when removing partial impurities, make quartz expose unsalted surface, expanded the surface differences of quartzy and impure mineral, be beneficial to improve the selectivity of lower step flotation operation;
(3) the quartzy tail of cleaning after reagent removal water treatment is carefully carried out to reverse flotation: flotation collector adopts oleic acid or sodium oleate class, and collector dosage is about 50 ~ 350g/t, adjusting agent adopts Na
2cO
3or NaOH, quartz tail sand after reagent removal water treatment is sized mixing, control flotation slurry pH value 7.5 ~ 9.8, quartz tail sand slurries after sizing mixing are sent into and in flotation machine, are carried out reverse flotation, wherein carbonate, mica, feldspar impure mineral float with form of foam and remove, and satisfactory quartz tail sand is stayed in ore pulp;
It is all known products that the flotation collector using in above-mentioned technological process adopts oleic acid or sodium oleate class, and the equal alone cycle of the liquid medicine using in above-mentioned technological process is used.
The invention has the advantages that:
The present invention effectively isolates high-quality quartz tail sand from quartz tail sand fine sand; for the industries such as ceramic glaze, chemical filler, electrotechnical, electronic filler provide an alternate resources with silicon powder; protected environment, reduced costs, alleviated and be faced with the day by day exhausted crisis of resource.
Embodiment
Following examples elaborate to the present invention, in Table 1.
Implementation condition: 1, clean step: scouring condition: HCl:32.0kg/t, cleans concentration: 50%, the scouring time: 15min.
2, reagent removal water step:
3, size mixing and flotation step: the condition of sizing mixing: Na
2cO
3: 0.8 kg/t, PH:8.5, collecting agent: oleic acid: 120g/t; Flotation conditions: floatation concentration: 25%, flotation time: 5min
Case study on implementation result table 1
Result shows: the every chemical index of final washed ore after above-mentioned art breading meets the requirements of industry to siliceous raw material interior quality such as high-grade ceramic glaze, chemical filler, electrotechnical, electronic silicon powder.
Claims (1)
1. utilize quartzy tail fine sand to prepare the degree of depth method of purification of silicon powder, it is characterized in that comprising the following steps:
(1), adopt hydrochloric acid or sulfuric acid to SiO
2content is cleaned at 96% ~ 99% quartzy tail fine sand, and quartz tail sand is 35% ~ 70% with the scouring concentration of the ratio formation of the scouring liquor gross weight that comprises quartz tail sand, and the scouring time is 5 ~ 60min, and hydrochloric acid or sulfuric acid consumption are between 10 ~ 100kg/t;
(2), above-mentioned scouring sand is put into dehydration bucket and carried out reagent removal water treatment;
(3), reverse flotation purifies, flotation collector adopts oleic acid, collector dosage is 50 ~ 350g/t, adjusting agent adopts Na
2cO
3or NaOH, quartzy tail fine sand after reagent removal water treatment is sized mixing, control flotation slurry pH value 7.5 ~ 9.8, quartzy tail fine sand slurries after sizing mixing are sent into and in flotation machine, are carried out reverse flotation, wherein carbonate, mica, feldspar impure mineral float with form of foam, and satisfactory quartzy tail fine sand is stayed in ore pulp.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210233553.2A CN102730704B (en) | 2012-07-07 | 2012-07-07 | Depth purification method for preparing silica powder by using quartz tailings |
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| CN201210233553.2A CN102730704B (en) | 2012-07-07 | 2012-07-07 | Depth purification method for preparing silica powder by using quartz tailings |
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| CN102730704A CN102730704A (en) | 2012-10-17 |
| CN102730704B true CN102730704B (en) | 2014-02-05 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107032600B (en) * | 2017-03-20 | 2019-07-16 | 凯盛石英材料（黄山）有限公司 | A method of TFT-LCD silicon powder is prepared using vein quartz tailings |
| CN107792859A (en) * | 2017-11-09 | 2018-03-13 | 新沂市宏润石英硅微粉有限公司 | A kind of recovery method of environmentally friendly silicon powder |
| CN115092937A (en) * | 2022-06-15 | 2022-09-23 | 凯盛石英材料（太湖）有限公司 | Method for preparing 4N5 high-purity quartz by energy-saving environment-friendly efficient impurity removal |
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| CN1032631A (en) * | 1988-09-17 | 1989-05-03 | 郑州轻金属研究所 | Carbonate-fluorite flotation separation method |
| JPH07309615A (en) * | 1994-05-17 | 1995-11-28 | Shin Etsu Chem Co Ltd | Production of synthetic quartz glass powder |
| CN1267197C (en) * | 2004-09-16 | 2006-08-02 | 中国凯盛国际工程有限公司 | Flotation process for quartz tail sand and its special floatation collecting agent |
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