Method for zero emission production of gold mine tailings

Abstract

The invention provides a method for zero emission production of gold mine tailings. The method comprises a first step of separating tailing pulp discharged by a mine plant and separating coarse grain tailings and fine grain tailing paste; a second step of airing the coarse grain tailings into building sand or performing drying dehydration and then grinding the coarse grain tailings to prepare a cement composite material; and mixing a cementing material into the fine grain tailing paste and then filling a goaf. According to the method for zero emission production of gold mine tailings, after the tailings of gold mine dressing plant are graded through a cyclone, bottom flow products are dehydrated through a high-frequency vibrating screen to prepare the building sand or are dehydrated and ground to prepare the cement composite material, overflow is concentrated through an efficient thickener and then fills the underground goaf or is used for producing building materials such as a concrete block, and clear water of the overflow of the thickener is recycled. Industrial production and organization are balanced by adjusting the quantity of the prepared building sand tailings, the quantity of the cement composite material tailings, the quantity of the goaf filling tailings and the quantity of the tailings for building material production, and the zero emission production of the gold mine tailings is achieved.

Description

technical field [0001] The invention relates to a zero-discharge production process for gold mine tailings. Background technique [0002] With the continuous increase in the exploitation of mineral resources in my country, the discharge of tailings will continue to increase. According to statistics, there are more than 12,000 tailings ponds in China. 100 million t, and the land occupied and polluted by tailings has reached more than 13 million mu. At present, more than 1.5 billion tons of new tailings discharge is added every year in the country, and the annual area needs to be increased by about 30,000 mu. The tailings discharge in many areas has reached the ecological tolerance limit and faces a situation where there is nowhere to discharge. [0003] Statistics show that the comprehensive utilization rate of mine tailings in my country is only about 7%, and a large number of tailings are piled up or discharged into natural sites for a long time, which has a serious impact ...

AI Technical Summary

Problems solved by technology

The stockpiling of tailings not only occupies a large amount of land, consumes funds, wastes resources, and affects the economic benefits of enterprises, but also after the mine tailings are corroded, the migratable elements undergo chemical migration, polluting the atmosphere, water and soil, leading to soil degradation, vegetation destruction, and even direct It threatens the lives of humans and animals; and there are huge safety hazards. There have been many accidents at home and abroad such as tailings dam failures, causing a large number of casualties. Therefore, it is imminent to speed up the comprehensive utilization of tailings and realize zero discharge of tailings.

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