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Calcining method for high-purity silica sand

A high-purity quartz sand and calcination technology, which is applied in the direction of silicon dioxide and silicon oxide, can solve the problems of unstable quality, high price, limited reserves, etc., and achieve the effect of stable process and low price

Active Publication Date: 2018-11-06
新疆能源(集团)晶拓科技材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reserves of crystal in our country are limited, the price is expensive, the texture is uneven, and some mineral impurities and impurities in the process cannot be removed, resulting in small batches of ultra-pure quartz sand produced from crystals and unstable quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for calcining high-purity quartz sand, the preparation technical scheme is as follows:

[0024] Step 1, coarse grinding, crushing the vein quartz raw ore to make 0.5-5mm quartz coarse powder;

[0025] Step 2, strong magnetic selection, put the obtained quartz coarse powder into a wet mill and grind it into 100-mesh quartz powder, and then place the obtained quartz powder under a magnetic field strength of 1.6T and a pulsation of 250r / min Frequency, pulp flow rate of 0.7cm / s, magnetic separation in a magnetic separator at a pulp concentration of 30%; then grind the particles after magnetic separation to 200 mesh, and repeat the magnetic separation steps to collect the obtained quartz powder;

[0026] Step 3, reverse flotation, configure 1100 parts of quartz powder collected in step 2 into 30% pulp with purified water, then add 0.3 part of collector, 0.1 part of caustic starch, and 0.3 part of pH regulator hydrogen Sodium oxide, carry out reverse flotation opera...

Embodiment 2

[0036] A method for calcining high-purity quartz sand, the preparation technical scheme is as follows:

[0037] Step 1, coarse grinding, crushing the vein quartz raw ore to make 0.5-5mm quartz coarse powder;

[0038] Step 2, strong magnetic selection, put the obtained coarse quartz powder into a wet mill and grind it into 70-mesh quartz powder, and then put the obtained quartz powder under the magnetic field strength of 0.8T, 200-300r / min pulsation frequency, 0.4cm / s pulp flow rate, 25% pulp concentration, magnetic separation in a magnetic separator; then grind the particles after magnetic separation to 200 mesh, and repeat the magnetic separation steps to collect the obtained quartz powder ;

[0039] Step 3, reverse flotation, configure 1000 parts of quartz powder collected in step 2 into 25% pulp with purified water, then add 0.1 part of collector, 0.05 part of caustic starch, 0.1 part of pH regulator hydrogen Sodium oxide, carry out reverse flotation operation at 10°C;

...

Embodiment 3

[0049] A method for calcining high-purity quartz sand, the preparation technical scheme is as follows:

[0050] Step 1, coarse grinding, crushing the vein quartz raw ore to make 0.5-5mm quartz coarse powder;

[0051] Step 2, strong magnetic selection, put the obtained quartz coarse powder into a wet mill and grind it into a 140-mesh quartz powder, and then place the obtained quartz powder under a magnetic field strength of 1.5T and a pulsation of 300r / min Frequency, pulp flow rate of 1.0cm / s, magnetic separation in a magnetic separator at a pulp concentration of 35%; then grind the particles after magnetic separation to 300 mesh, and repeat the magnetic separation step to collect the obtained quartz powder;

[0052] Step 3, reverse flotation, configure 1200 parts of quartz powder collected in step 2 into 35% pulp with purified water, then add 0.5 part of collector, 0.15 part of caustic starch, and 0.5 part of pH regulator hydrogen Sodium oxide, carry out reverse flotation ope...

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Abstract

The invention relates to the field of preparation of new materials, in particular to a calcining method for high-purity silica sand. The calcining method for the high-purity silica sand mainly comprises the following steps: coarse grinding, strong magnetic selection, reverse flotation, roasting, acid leaching and vacuum calcining. The invention discloses the calcining method for the high-purity silica sand. According to the scheme, vein quartz mineral raw materials which are abundant in China are utilized, ultra-high-purity crystal quartz is prepared, and the calcining method for the high-purity silica sand has the characteristics of low price and stable process.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a method for calcining high-purity quartz sand. Background technique [0002] High-purity quartz sand refers to quartz sand with a silica content of more than 99.9%. Because of its unique physical and chemical properties, it plays an important role in aviation, aerospace, electronics, machinery and today's rapidly developing IT industry. Status, especially its internal molecular chain structure, crystal shape and lattice change law, make it have high temperature resistance, small thermal expansion coefficient, high insulation, corrosion resistance, piezoelectric effect, resonance effect and its unique optical characteristics, in many Playing an increasingly important role in high-tech products. [0003] CN107445173A discloses a preparation method of low-hydroxyl ultra-high-purity quartz sand, which mainly includes processes such as material selection, calcination, water quenc...

Claims

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Application Information

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IPC IPC(8): C01B33/18
CPCC01B33/18C01P2006/80
Inventor 裘志超赵阳刘泽伟
Owner 新疆能源(集团)晶拓科技材料有限责任公司
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