Production process for preparing high-purity quartz powder from quartzite

A production process and quartzite technology, which is applied in the field of natural mineral purification technology, can solve the problems that the purity of high-purity ultrafine quartz powder is difficult to stabilize, the impurity content is very different, and the quality of quartz raw ore is different, so as to ensure loose characteristics and reduce energy. consumption, increase the contact probability and the effect of time

Inactive Publication Date: 2015-04-29
新沂市永恒熔融石英有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quality of raw quartz ore varies greatly across the country, and the content of impurities varies greatly. The purity of high-purity ultra-fine quartz powder produced by traditional techniques is difficult to stabilize
At the same time, the processing of quartz products consumes a lot of energy. In the traditional process, a large amount of electric energy and heat energy are required, which consumes a large amount of coal and natural gas; at the same time, in the traditional dry crushing process, fine dust will give operators cause irreversible physical damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A production process for preparing high-purity quartz powder from quartzite, comprising the following steps: 1) soaking; 2) crushing; 3) calcining; 4) water quenching; 5) grinding; 6) magnetic separation; 7) electrostatic separation; 8) pickling; 9) deionized water cleaning; 10) drying;

[0039] Wherein, in step 1), the quartzite is soaked in the first acid solution for 0.5 hour, and the first acid solution contains 3wt% HCl, 10wt% HNO 3 , 6wt%H 2 SO 4 and 0.1 wt% HF in water.

[0040] In step 2), during pulverization, abrasive materials are added for scrubbing and desliming, and the abrasive materials include: 20wt% boron carbide, 30wt% silicon carbide and 50wt% corundum. Crush the quartz rock to a particle size of 0.5-2mm.

[0041] In step 3), the calcination temperature is 800° C., and the calcination time is 0.5 hour.

[0042] In step 4), the mineral obtained after calcination is immersed in a second acid solution for water quenching. The second acid solution c...

Embodiment 2

[0049] A production process for preparing high-purity quartz powder from quartzite, comprising the following steps: 1) soaking; 2) crushing; 3) calcining; 4) water quenching; 5) grinding; 6) magnetic separation; 7) electrostatic separation; 8) pickling; 9) deionized water cleaning; 10) drying;

[0050] Wherein, in step 1), the quartzite is soaked in the first acid solution for 1 hour, and the first acid solution contains 5wt% HCl, 12wt% HNO 3 , 8wt%H 2 SO 4 and 0.3 wt% HF in water.

[0051] In step 2), during pulverization, abrasive materials are added for scrubbing and desliming, and the abrasive materials include: 25wt% boron carbide, 40wt% silicon carbide and 35wt% corundum. In addition, in step 2), the quartzite is pulverized to a particle size of 0.5 to 2 mm.

[0052] In step 3), the calcination temperature is 840° C., and the calcination time is 1.5 hours.

[0053] In step 4), the mineral obtained after calcination is immersed in a second acid solution for water que...

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Abstract

The invention discloses a production process for preparing high-purity quartz powder from quartzite. The production process comprises the following steps: 1) soaking; 2) smashing; 3) calcining; 4) water quenching; 5) grinding; 6) magnetic separation; 7) elestrostatic separation; 8) acid pickling; 9) cleaning by deionized water; 10) drying. According to the production process, the contamination particles are eluted via gradient acidity distribution; before the smashing, strong acid is used for soaking so as to remove the impurities on the surface of the quartzite; during the water quenching, medium/strong acid is used for removing the metal impurities wrapped in the quartzite; during the grinding, in order to protect the equipment from erosion, medium/weak acid is used for removing the impurities during the grinding, and a ball grinding mill is utilized to increase the contact probability and contact area between the acid liquor and the impurities so as to increase the impurity removal efficiency; during the final acid pickling, weak acid is used for further removing a small quantity of residual contamination particles which are not reacted completely; the afterheat generated during the calcination is collected and used for the final drying, so that the energy consumption is reduced and the production cost of the enterprise is decreased.

Description

technical field [0001] The invention relates to a natural mineral purification process, in particular to a high-purity quartz purification process, in particular to a production process for preparing high-purity quartz powder from quartzite. Background technique [0002] High-purity quartz powder has excellent physical and chemical properties, high hardness, high temperature resistance, corrosion resistance, low electrical conductivity, good wave transmission performance, and stable performance. In particular, its internal molecular chain structure, crystal shape and lattice change rules make it have a small thermal expansion coefficient, high insulation, piezoelectric effect, resonance effect and its unique optical characteristics. It is used in many high-tech fields such as new electric light sources, Microelectronics, high-insulation sealing, aerospace, national defense and other fields have been more and more widely used. [0003] With the rapid development of high-tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/037
Inventor 王应三王泽龙管俊芳李欣晓玉
Owner 新沂市永恒熔融石英有限公司
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