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Method for preparing 4N high-purity quartz sand by taking pegmatite quartz as raw material

A technology of high-purity quartz sand and pegmatite, which is applied in chemical instruments and methods, wet separation, silicon dioxide, etc., can solve the problems of complex preparation process and insufficient purity of high-purity quartz sand, and promote the flotation of ore pulp. , The process is simple, the effect of increasing the contact surface area

Active Publication Date: 2020-11-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome above-mentioned technical deficiency, propose a kind of method that is raw material preparation 4N high-purity quartz sand with pegmatite quartz, this method can obviously reduce pegmatite The content of impurity elements in crystal rock quartz can be used to obtain quartz sand with high purity, and the consumption of chemicals in the preparation process is small, and the process flow is simple. This method solves the problem of complex preparation process and insufficient purity of high-purity quartz sand in the prior art technical issues

Method used

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  • Method for preparing 4N high-purity quartz sand by taking pegmatite quartz as raw material
  • Method for preparing 4N high-purity quartz sand by taking pegmatite quartz as raw material
  • Method for preparing 4N high-purity quartz sand by taking pegmatite quartz as raw material

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Embodiment 1

[0038] Embodiment 1 of the present invention provides a method for preparing 4N high-purity quartz sand from pegmatite quartz in a certain place in Inner Mongolia. The method includes the following steps:

[0039] (1) Crushing, grinding, and screening: Use a jaw crusher to crush the pegmatite quartz raw ore, then use a ball mill to grind the ore, and finally use a vibrating screen to sieve the material to 50-140 mesh to obtain pegmatite quartz powder ;

[0040] (2) Flotation treatment: add ultra-pure water to the pegmatite quartz powder to adjust the slurry to 10wt%, and then add a mass fraction of 10% H 2 SO 4 solution to adjust the pH of the pulp to 2, add 300g.t -1 Sodium dodecylsulfonate, stirred for 5min, then added 600g.t -1 Dodecylamine is carried out flotation, open inflation valve, after stirring for 30s, scrape foam until no foam is produced, remove silicate gangue minerals such as feldspar, mica in pegmatite quartz powder, obtain pegmatite quartz concentrate, An...

Embodiment 2

[0045] Embodiment 2 of the present invention provides a method for preparing 4N high-purity quartz sand from pegmatite quartz in a certain place in Inner Mongolia. The method includes the following steps:

[0046] (1) Crushing, grinding, and screening: Use a jaw crusher to crush the pegmatite quartz raw ore, then use a ball mill to grind the ore, and finally use a vibrating screen to sieve the material to 50-140 mesh to obtain pegmatite quartz powder ;

[0047] (2) Flotation treatment: add ultrapure water to the pegmatite quartz powder to adjust the slurry to 20wt%, and then add a mass fraction of 10% H 2 SO 4 solution to adjust the pH of the pulp to 2.5, add 300g.t -1 Sodium dodecylsulfonate, stirred for 5min, then added 600g.t -1 Dodecylamine is carried out flotation, open inflation valve, after stirring for 30s, scrape foam until no foam is produced, remove silicate gangue minerals such as feldspar, mica in pegmatite quartz powder, obtain pegmatite quartz concentrate, A...

Embodiment 3

[0052] Embodiment 3 of the present invention provides a method for preparing 4N high-purity quartz sand from pegmatite quartz in a certain place in Inner Mongolia. The method includes the following steps:

[0053] (1) Crushing, grinding, and screening: Use a jaw crusher to crush the pegmatite quartz raw ore, then use a ball mill to grind the ore, and finally use a vibrating screen to sieve the material to 50-140 mesh to obtain pegmatite quartz powder ;

[0054] (2) Flotation treatment: add ultrapure water to the pegmatite quartz powder to adjust the slurry to 25wt%, and then add a mass fraction of 10% H 2 SO 4 solution to adjust the pH of the pulp to 3, add 400g.t -1 Sodium dodecylsulfonate, stirred for 5min, then added 700g.t -1 Dodecylamine is carried out flotation, open inflation valve, after stirring for 30s, scrape foam until no foam is produced, remove silicate gangue minerals such as feldspar, mica in pegmatite quartz powder, obtain pegmatite quartz concentrate, And...

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Abstract

The invention discloses a method for preparing 4N high-purity quartz sand by using pegmatite quartz as a raw material, and the method comprises the following steps: (1) crushing, grinding and screening pegmatite quartz raw ore to obtain pegmatite quartz powder; (2) adjusting the pegmatite quartz powder into ore pulp, adjusting the pH value of the ore pulp to 2-3, adding an anionic collecting agentinto the ore pulp, performing stirring, and then adding a cationic collecting agent for flotation treatment; (3) roasting the pegmatite quartz concentrate at 850-1,000 DEG C for 3-7 hours, and carrying out water quenching treatment on the pegmatite quartz concentrate after roasting is finished; (4) mixing the pegmatite quartz concentrate obtained after roasting and water quenching treatment withleachate, and performing hot-pressing leaching treatment, wherein the hot-pressing leaching temperature ranges from 220 DEG C to 250 DEG C, the hot-pressing leaching time ranges from 4 h to 8 h, and the leachate is a mixed solution of a sulfuric acid solution and a hydrofluoric acid solution. According to the method disclosed by the invention, the quartz sand with higher purity can be obtained, and the preparation process flow is simple.

Description

technical field [0001] The invention belongs to the technical field of non-metallic mineral processing and purification, and in particular relates to a method for preparing 4N high-purity quartz sand by using pegmatite quartz as a raw material. Background technique [0002] Quartz (quartz), the chemical formula is SiO 2 , is an important non-metallic mineral material, ordinary quartz sand is often used in ceramics, glass and glass products. And high purity quartz (high purity quartz), SiO 2 Content ≥ 99.9%, because of its excellent thermal properties, optical properties and electrical properties, it is widely used in optical fiber communication, aerospace, military industry, electronic technology and other fields. With the rapid development of electronic information technology, ultra-high purity quartz materials appear more and more important. High purity quartz sand on SiO 2 The content requirements are high, and impurity elements (such as Fe, Al, K, Na and other elemen...

Claims

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Application Information

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IPC IPC(8): C01B33/12B03B7/00B03D1/02B03B1/00
CPCC01B33/12B03B7/00B03D1/02B03B1/00C01P2006/80C01P2002/72C01P2004/03Y02P10/20
Inventor 李育彪肖蕲航柯春云王志杰
Owner WUHAN UNIV OF TECH
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