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Low-grade quartz sand purification process

A quartz sand, low-grade technology, applied in the field of quartz sand purification, can solve the problems of low sorting efficiency, insufficient purity of quartz sand, unstable product quality, etc., and achieve the effects of stable process, good application value, and improved sorting effect.

Inactive Publication Date: 2018-12-21
江苏凯达石英股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous development of minerals, high-quality ore deposits are gradually decreasing, and the development of low-grade quartz sand deposits is gradually increasing. For the purification process of low-grade quartz sand, the existing production technology generally has insufficient purity of quartz sand, low separation efficiency, Unstable product quality and other issues

Method used

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  • Low-grade quartz sand purification process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A low-grade quartz sand purification process, comprising the following steps:

[0044] 1) crushing and sieving; SiO 2 The raw ore of low-grade quartz sand with a content of 91.2% is processed to less than 0.35 mm by crusher and screening equipment, and material A is obtained.

[0045] 2) Grinding and screening: use a grinding machine and screening equipment to process the material A to a size below 0.125mm to obtain material B.

[0046]3) Desliming: use a curved vibrating sieve with a mesh size of 0.074mm to wash and desludge with water to obtain material C with a particle size of 0.125mm-0.074mm and slime D with a particle size below 0.074mm.

[0047] 4) Magnetic separation-electric separation: use a magnetic separator to conduct magnetic separation on material C under a magnetic field strength of 10000GS to remove some magnetic impurities; then use a voltage of 28 kV electrostatic separator for separation to remove some non-magnetic impurities to obtain material E. ...

Embodiment 2

[0054] A low-grade quartz sand purification process, comprising the following steps:

[0055] 1) crushing and sieving; SiO 2 The raw ore of low-grade quartz sand with a content of 91.2% is processed to less than 0.35 mm by crusher and screening equipment, and material A is obtained.

[0056] 2) Grinding and screening: use a grinding machine and screening equipment to process the material A to a size below 0.125mm to obtain material B.

[0057] 3) Desliming: use a curved vibrating sieve with a mesh size of 0.074mm to wash and desludge with water to obtain material C with a particle size of 0.125mm-0.074mm and slime D with a particle size below 0.074mm.

[0058] 4) Magnetic separation-electric separation: use a magnetic separator to conduct magnetic separation on material C under a magnetic field strength of 11000GS to remove some magnetic impurities; then use a voltage of 30 kV electrostatic separator to perform separation to remove some non-magnetic impurities to obtain mate...

Embodiment 3

[0065] A low-grade quartz sand purification process, comprising the following steps:

[0066] 1) crushing and sieving; SiO 2 The raw ore of low-grade quartz sand with a content of 91.2% is processed to less than 0.35 mm by crusher and screening equipment, and material A is obtained.

[0067] 2) Grinding and screening: use a grinding machine and screening equipment to process the material A to a size below 0.125mm to obtain material B.

[0068] 3) Desliming: use a curved vibrating sieve with a mesh size of 0.074mm to wash and desludge with water to obtain material C with a particle size of 0.125mm-0.074mm and slime D with a particle size below 0.074mm.

[0069] 4) Magnetic separation-electric separation: use a magnetic separator to conduct magnetic separation on material C under a magnetic field strength of 11000GS to remove some magnetic impurities; then use a voltage of 30 kV electrostatic separator to perform separation to remove some non-magnetic impurities to obtain mate...

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Abstract

The invention discloses a low-grade quartz sand purification process. The low-grade quartz sand purification process is characterized by comprising the following steps that 1) crushing and screening are performed; 2) ore grinding and screening are performed; 3) desliming is performed; 4) magnetic separation-electric separation is performed; 5) grading is performed; and 6) coarse grains obtained after grading enter a flotation machine for flotation, and fine grains obtained after grading and ore mud obtained after desliming treatment in the step 3) jointly enter a flotation column for flotation. According to the low-grade quartz sand purification process, the grading flotation is adopted, the coarse grains enter the flotation machine for flotation, and the fine grains and the ore mud enterthe flotation column for flotation so that the characteristics of the flotation machine and the flotation column can be fully utilized, then the flotation effect can be remarkably improved, the recovery rate and the grade of the quartz sand fine ore can be improved; by performing desliming in advance, the separation effect of the magnetic separation and the electric separation can be remarkably improved; a proper combination collecting agent is selected for collecting impurities, so that the grade of the quartz sand fine ore is greatly improved; through the low-grade quartz sand purification process, efficient purification can be performed on the low-grade quartz sand, the agent consumption is low, the process is stable, and the low-grade quartz sand purification process has the good application value.

Description

technical field [0001] The invention relates to the technical field of quartz sand purification, in particular to a low-grade quartz sand purification process. Background technique [0002] Quartz sand is a hard, wear-resistant, chemically stable silicate mineral whose main chemical composition is SiO2. Quartz sandstone is the main source of quartz sand siliceous mineral raw materials for glass, ceramics, foundry and other industries. Because quartz sandstone contains impurities such as associated minerals and cement, it must be purified by mineral processing before it can be used industrially. In recent years, the glass industry and the new energy industry have developed rapidly, and the amount of quartz sand has been increasing. There is a large gap in the use of quartz sand in the glass industry, which is far from meeting the needs of economic and social development and strategic emerging industries. The unique physical and chemical properties of quartz sand make it not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03D1/008B03D1/01B03D101/04B03D101/02B03D103/02
CPCB03B7/00B03D1/008B03D1/01B03D2201/02B03D2201/04B03D2203/02
Inventor 张勋张凤凯李玉军刘祥友石坤
Owner 江苏凯达石英股份有限公司