Quartz sand tailing mud recycling method

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...

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.

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