Quartz sand tailing mud recycling method

A technology of quartz sand and tailings, which is applied in the direction of recycling technology, mechanical material recovery, chemical instruments and methods, etc., can solve the problems of large environmental hazards, HF has high toxicity, etc., and achieve the effect of high purity

Pending Publication Date: 2022-05-27
海南绿峰资源开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the effect of hydrofluoric acid method is also good in industrial application. It is the main process for the separation of feldspar and quartz. However, because HF is highly toxic, it is more harmful to the environment.

Method used

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  • Quartz sand tailing mud recycling method

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Experimental program
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Effect test

Embodiment 1

[0028] A method for recycling quartz sand tailings, comprising the following steps:

[0029] (1) Washing: the quartz sand tailing mud is washed with water;

[0030] (2) Magnetic separation: magnetic separation of the washed quartz sand tailings to remove magnetic metal impurities and strong magnetic ores;

[0031] (3) Classification: classify the quartz sand tailings after magnetic separation to obtain 150-300 mesh ultra-fine-grained quartz sand tailings, 80-150 mesh fine-grained quartz sand tailings, and 20-80 mesh coarse-grained quartz sand tailings;

[0032] (4) low-temperature pulverization: after the fine-grained and coarse-grained quartz sand tailings are pulverized at a low temperature at a temperature of -65 ° C, and mixed with the ultra-fine-grained quartz sand tailings obtained in step (3) into ultra-fine powder;

[0033] (5) Flotation: After the cationic collector tetraethylamine chloride aqueous solution is prepared, the inhibitor is added, and the pH is adjusted ...

Embodiment 2

[0038] A method for recycling quartz sand tailings, comprising the following steps:

[0039] (1) Washing: the quartz sand tailing mud is washed with water;

[0040] (2) Magnetic separation: magnetic separation of the washed quartz sand tailings to remove magnetic metal impurities and strong magnetic ores;

[0041] (3) Classification: classify the quartz sand tailings after magnetic separation to obtain 150-300 mesh ultra-fine-grained quartz sand tailings, 80-150 mesh fine-grained quartz sand tailings, and 20-80 mesh coarse-grained quartz sand tailings;

[0042] (4) low-temperature pulverization: after the fine-grained and coarse-grained quartz sand tailings are pulverized at a low temperature at a temperature of -10 ° C, and mixed with the ultra-fine-grained quartz sand tailings obtained in step (3) into ultra-fine powder;

[0043] (5) Flotation: After the cationic collector tetraethylamine chloride aqueous solution is prepared, the inhibitor is added, and the pH is adjusted ...

Embodiment 3

[0048] A method for recycling quartz sand tailings, comprising the following steps:

[0049] (1) Washing: the quartz sand tailing mud is washed with water;

[0050] (2) Magnetic separation: magnetic separation of the washed quartz sand tailings to remove magnetic metal impurities and strong magnetic ores;

[0051] (3) Classification: classify the quartz sand tailings after magnetic separation to obtain 150-300 mesh ultra-fine-grained quartz sand tailings, 80-150 mesh fine-grained quartz sand tailings, and 20-80 mesh coarse-grained quartz sand tailings;

[0052] (4) low-temperature pulverization: after the fine-grained and coarse-grained quartz sand tailings are pulverized at a low temperature at a temperature of 0 ° C, and mixed with the ultra-fine-grained quartz sand tailings obtained in step (3) into ultra-fine powder;

[0053] (5) Flotation: After the cationic collector tetraethylamine chloride aqueous solution is added, the inhibitor is added, and the pH is adjusted to 8....

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PUM

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Abstract

The invention discloses a quartz sand tailing mud recycling method which comprises the following steps: removing metal impurities in clay mud through water washing, removing magnetic metal impurities and strong magnetic ores in the quartz sand tailing mud through magnetic separation, breaking fluid inclusion and quartz crystal lattices through low-temperature crushing, exposing aluminum impurities in the fluid inclusion and the quartz crystal lattices, and removing the aluminum impurities through acid pickling. And for impurities such as aluminum and the like which are not removed in the feldspar, performing flotation on the feldspar by adopting a cation collecting agent through a flotation method, activating the feldspar and inhibiting the quartz by adopting sodium silicofluoride, and finally obtaining high-purity and high-yield quartz. The method can be applied to production of high-end products such as monocrystalline silicon, polycrystalline silicon, quartz glass, optical fibers, solar cells, integrated circuit substrates and aerospace materials.

Description

technical field [0001] The application relates to the field of deep processing of quartz sand tailings, in particular to a method for recycling quartz sand tailings. Background technique [0002] After the washed quartz sand is washed out, the sand that is precipitated again with the washing water is called quartz sand tailings. The annual discharge of quartz sand tailings in my country is tens of millions of tons. The discharge of such a large amount of quartz tailings directly causes serious environmental pollution, occupation of cultivated land, siltation of rivers and reservoirs and other adverse consequences. Resource utilization has become an inevitable trend. [0003] High-purity quartz powder has excellent optical properties, thermal stability, chemical stability and radiation resistance, and is the main source of high-performance materials such as monocrystalline silicon, polycrystalline silicon, quartz glass, optical fibers, solar cells, and integrated circuit subs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00C01B33/12
CPCB03B7/00C01B33/12C01P2006/80Y02W30/52
Inventor 曾宏王有能李琼根林武潘勇
Owner 海南绿峰资源开发有限公司
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