Harmless disposal system for mine tailings

Abstract

The invention provides a harmless disposal system for mine tailings. The harmless disposal system for the mine tailings comprises a dry sand preparing and tailing disposing mechanism which adopts a slurry pump to pump concentration plant full tailing mortar to a hydrocyclone to be classified and then dewaters it by a high-frequency vibration dewatering screen to make dry sand; a fine-grain high-concentration tailing concentrating mechanism which adopts a buffer tank to mix hydrocyclone overflow and the concentration plant full tailing mortar with water and enables a mixture to flow to a paste thickener for concentrating to obtain fine-grain high-concentration tailings, a filter cake preparing and tailing disposing mechanism which adopts a plate frame type filter press to perform filter-pressing dewatering on a part of the fine-grain high-concentration tailings to obtain tailing filter cakes, and a cemented tailings backfill preparing and tailing processing mechanism in which the other part of the fine-grain high-concentration tailings is taken as filling aggregate, cement is used in cooperation as a cementing material, and they are stirred in a double-shaft horizontal stirring tank and a powerful stirring barrel and then conveyed to an underground goaf through a filling pump to be subjected to fine-grain tailing cementing and filling. The method has three tailing disposal modes of dry sand preparation, filter cake preparation and cemented tailings backfill preparation, and meets the requirements of green mine construction.

Description

technical field [0001] The invention relates to the technical field of tailings harmless disposal and tailings comprehensive utilization, in particular to a mine tailings harmless disposal system. Background technique [0002] The traditional wet-discharge tailings inventory has safety issues in tailings dams, and the construction of tailings ponds is limited by terrain conditions. At the same time, wet-discharge tailings ponds are not conducive to the recovery of tailings resources. Many old mines have been mined for many years, and the amount of tailings has basically reached the design capacity of the tailings pond. As the service life increases, the amount of tailings also increases. The tailings stock is in potential danger of dam collapse. How to effectively use resources to extend the tailings The service life of the warehouse is an urgent problem faced by many old mining enterprises. For some arid areas with little rainfall, where it is difficult to acquire land for...

AI Technical Summary

Problems solved by technology

[0003] In view of the valuable mineral elements still remaining in the existing tailings wastewater, the comprehensive utilization rate of tailings is low, the surrounding rock conditions of underground gobs are unstable and need to be treated, the recycling rate of tailings wastewater is low, and the tailings storage capacity is full Or the upper limit is about to be reached, to avoid the traditional wet discharge tailings stock at the high infiltration line, there is a risk of dam collapse, and to reduce the technical problems of environmental pollution. The present invention provides a mine tailings harmless disposal system

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