Method for purifying quartz sands

A quartz sand and quartz technology, applied in the field of purified quartz sand, can solve the problems of uneven purity, inability to fully utilize the value of use, and failure to consider quartz sand particles, etc.

Pending Publication Date: 2020-05-29
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process can obtain quartz sand concentrate, it also does not consider the inhomogeneity of the purity between the quartz sand particles, and ignores that the same batch

Method used

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  • Method for purifying quartz sands

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The concrete steps of preparation are:

[0033] Step 1, according to the weight ratio of 70 mesh quartz sand concentrate particles with a single quartz mineral and pure water is 10:1500, the quartz sand concentrate particles and pure water are stirred and mixed for 1 min to obtain a mixed solution with a determined volume; , a single quartz mineral is an object whose composition is pure quartz phase as detected by X-ray diffraction (or neutron diffraction, or infrared spectrum phase).

[0034] Step 2, first add the cationic collector to the mixed solution and stir and mix for 1 min according to the weight ratio of pure water and 0.05mol / L cationic collector in the mixed solution with a determined volume of 1500:1; wherein, the cationic collector The collector is polyetheramine D-400 among etheramine collectors to obtain a flotation liquid. Then carry out 2min flotation to the flotation liquid to obtain flotation quartz sand and residual liquid.

[0035] In step 3, add...

Embodiment 2

[0037] The concrete steps of preparation are:

[0038] Step 1: Stir and mix the quartz sand concentrate particles and pure water for 1.5 minutes according to the weight ratio of 128-mesh quartz sand concentrate particles with a single quartz mineral and pure water to 58:1500 to obtain a mixed solution with a determined volume; Among them, the single quartz mineral is an object whose composition is pure quartz phase as detected by X-ray diffraction (or neutron diffraction, or infrared spectrum phase).

[0039] Step 2, according to the weight ratio of the pure water in the mixed solution of determined volume and the cationic collector of 0.075mol / L is 1500:0.78, add the cationic collector to the mixed solution and stir and mix for 5.8min; wherein, The cationic collector is polyetheramine D-400 among the etheramine collectors to obtain the flotation liquid. Then carry out 3min flotation to the flotation liquid to obtain flotation quartz sand and residual liquid.

[0040] In ste...

Embodiment 3

[0042] The concrete steps of preparation are:

[0043] Step 1, according to the weight ratio of 185 mesh quartz sand concentrate particles with a single quartz mineral and pure water is 105:1500, the quartz sand concentrate particles and pure water are stirred and mixed for 2 minutes to obtain a mixed solution with a determined volume; wherein , a single quartz mineral is an object whose composition is pure quartz phase as detected by X-ray diffraction (or neutron diffraction, or infrared spectrum phase).

[0044] Step 2, according to the weight ratio of the pure water in the mixed solution of determined volume and the cationic collector of 0.1mol / L is 1500:0.55, add the cationic collector to the mixed solution and stir and mix for 10.5min; wherein, The cationic collector is polyetheramine D-400 among the etheramine collectors to obtain the flotation liquid. Then carry out flotation to the flotation solution for 4 minutes to obtain flotation quartz sand and residual solution....

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Abstract

The invention discloses a method for purifying quartz sands. The method comprises the following steps: pretreating to obtain quartz sand concentrate particles; stirring and mixing 70-300-mesh quartz sand concentrate particles with single quartz minerals and pure water to obtain a mixed solution with a determined volume, adding a cationic collecting agent into the mixed solution with the determinedvolume, stirring and mixing to obtain a flotation solution, carrying out flotation on the flotation solution to obtain flotation quartz sands and a residual solution, supplementing pure water into the residual solution to a determined volume to obtain a mixed solution with the determined volume, and repeating the process of adding the cationic collecting agent into the mixed solution, stirring and mixing, and floating for at least one time to sort out quartz sands with different purity grades. The method not only can sort the same batch of quartz sands into quartz sands with different puritygrades to enable the quartz sands to be suitable for different fields and greatly improve the use value of the quartz sands, but also has the characteristics of simplicity, convenience, practicabilityand low cost, and is extremely easy to widely commercialize and apply to grading and purifying of the quartz sands.

Description

technical field [0001] The invention relates to a method for purifying mineral raw materials, in particular to a method for purifying quartz sand. Background technique [0002] Quartz sand is a non-metallic mineral raw material that is common in nature and widely used. As an important raw material, quartz sand has been widely used in the fields of semiconductor, photovoltaic, ceramics, optics, glass and military. At present, high-tech industries have very strict requirements on the purity of quartz sand, such as the manufacture of crucibles for solar-grade silicon and the production of optical fibers in the photovoltaic industry. With the advancement of science and technology, the demand for high-purity quartz sand is increasing, and the requirements for the purity of quartz sand are also increasing. Therefore, people have made unremitting efforts in order to obtain high-purity quartz sand, such as a fluorine-free and low-acid anion and cation reverse flotation quartz sand...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/01B03B1/00B03D101/02B03D103/04
CPCB03B1/00B03D1/00B03D1/01B03D2201/02B03D2203/04
Inventor 陈健蒋雪松魏梦楠班伯源李京伟
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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