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Preparation method of high-purity quartz sand

A high-purity quartz sand, quartz sand technology, applied in the direction of silica, silicon oxide, etc., can solve the problems of imperfect microbial iron removal technology, unsatisfactory treatment and iron removal effect, high power consumption of baking water, etc. Achieve remarkable iron removal effect, good scrubbing effect, and avoid secondary pollution

Pending Publication Date: 2020-01-31
SICHUAN QINGCHUAN HONGYUAN STONE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the existing production technology, mechanical scrubbing after crushing, baking water extraction, magnetic separation, acid leaching, flotation, microbial leaching, etc. are generally carried out to remove metal and non-metallic impurities, but the current mechanical scrubbing efficiency is low and the effect is not ideal. , Baking water consumes a lot of electricity, which is not conducive to reducing energy consumption and production costs. The acid leaching step consumes a large amount of acid. The environmental pollution is serious and the acid wastewater is difficult to treat and the iron removal effect is not ideal. The product quality is unstable. Iron technology is not perfect, it is still in the experimental stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of high-purity quartz sand, comprising the following steps:

[0028] Crushing: Clean the mined quartz sand rough ore and put it into the jaw crusher for rough crushing into quartz sand fragments below 50mm, put the quartz sand fragments into the wet mill for grinding, and screen the 0.2mm through the vibrating screen The following quartz sand particles;

[0029] Ultrasonic scrubbing: add the screened quartz sand particles into a solution equipped with a dispersant to make a pulp, the concentration of the pulp is 25%, the dispersant is sodium tripolyphosphate, the dosage is 1.5kg / t, and the pulp is placed in an ultrasonic pulverizer. 3h ultrasonic scrubbing, the ultrasonic intensity is controlled at 8W / m 2 , to obtain quartz sand fine sand; the quartz sand particles are violently impacted, and the trace impurities on the surface of the quartz sand particles are quickly peeled off from the surface of the quartz sand particles under the action of the ...

Embodiment 2

[0035] A preparation method of high-purity quartz sand, comprising the following steps:

[0036] Crushing: Clean the mined quartz sand rough ore and put it into the jaw crusher for rough crushing into quartz sand fragments below 50mm, put the quartz sand fragments into the wet mill for grinding, and screen the 0.2mm through the vibrating screen The following quartz sand particles;

[0037] Ultrasonic scrubbing: add the screened quartz sand particles into a solution equipped with a dispersant to make a pulp, the concentration of the pulp is 28%, the dispersant is sodium hexametaphosphate, and the dosage is 1.6kg / t, and the pulp is placed in an ultrasonic pulverizer for 6 hours of ultrasonic scrubbing, the ultrasonic intensity is controlled at 5-10W / m 2 , to obtain quartz sand fine sand; the quartz sand particles are violently impacted, and the trace impurities on the surface of the quartz sand particles are quickly peeled off from the surface of the quartz sand particles under...

Embodiment 3

[0043] A preparation method of high-purity quartz sand, comprising the following steps:

[0044] Crushing: Clean the mined quartz sand rough ore and put it into the jaw crusher for rough crushing into quartz sand fragments below 50mm, put the quartz sand fragments into the wet mill for grinding, and screen the 0.2mm through the vibrating screen The following quartz sand particles;

[0045] Ultrasonic scrubbing: add the screened quartz sand particles into a solution equipped with a dispersant to make a pulp, the concentration of the pulp is 30%, the dosage of the dispersant sodium pyrophosphate is 2.0kg / t, put the pulp in an ultrasonic pulverizer for 5h Ultrasonic scrubbing, the ultrasonic intensity is controlled at 8.5W / m 2 , to obtain quartz sand fine sand; the quartz sand particles are violently impacted, and the trace impurities on the surface of the quartz sand particles are quickly peeled off from the surface of the quartz sand particles under the action of the dispersan...

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Abstract

The invention discloses a preparation method of high-purity quartz sand, and belongs to the technical field of mineral refining, and the preparation method comprises the following steps: crushing: crushing quartz sand crude ore into quartz sand particles; ultrasonic scrubbing: performing ultrasonic scrubbing on quartz sand particles; magnetic separation: selecting high gradient magnetic separatorfor three times magnetic separation of quartz sand fine sand; acid leaching: performing microwave heating quartz sand after flotation, then stirring and soaking with a 10% oxalic acid solution; flotation: mixing the quartz sand after acid leaching with water and putting into a flotation machine, adjusting the pH value in three steps, and using different collectors for flotation at the same time; drying and bagging: drying in a vacuum drying oven, and vacuum bagging after cooling. The preparation process is simple, reasonable and efficient in design; iron impurities in the quartz sand can be removed by ultrasonic scrubbing, multiple magnetic separation, microwave heating and acid leaching and flotation; the iron impurities in the prepared high-purity quartz sand are reduced to below 0.35 mg / kg; and the product has stable quality and high efficiency, and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention belongs to the technical field of mineral extraction, in particular to a preparation method of high-purity quartz sand. Background technique [0002] my country's quartz sand beneficiation, purification and deep processing development and utilization are relatively late, and are mainly used in the construction industry, flat glass manufacturing, ceramic industry and foundry industry. A common point in these fields is that the demand for quartz sand is large and the quality of raw materials is low. For the high-quality quartz sand produced in some places in my country, it can basically meet the demand for industrial sand without beneficiation or purification. [0003] The higher the purity of quartz sand, the higher its value, especially in high-tech fields, where the purity of quartz sand is extremely high. The high-purity and ultra-high-purity quartz sand produced by beneficiation and purification have been widely used in high-tech fiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
CPCC01B33/12C01P2006/80
Inventor 李宁
Owner SICHUAN QINGCHUAN HONGYUAN STONE IND
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