Sedimentation, classified reverse filtering and dewatering and dry stacking method for fine grained tailings

Abstract

The invention discloses a sedimentation, classified reverse filtering and dewatering and dry stacking method for fine grained tailings. Total tailing pulp discharged from a concentration plant is concentrated and dewatered by a deep cone thickener, underflow flows to a high-frequency vibrating screen, coarse grained tailings on the screen slide to a funnel of a sealing-tape machine or a bucket ofa scraper, and the coarse grained tailings are conveyed to a sand pool of a gravity water filtering workshop by the sealing-tape machine or the scraper; a bottomed rectangular filtering sand tank is defined on the workshop floor by the coarse grained tailings in the sand pool with a grab machine, and concentrated underflow in a T-shaped sand bin is conveyed into the filtering sand tank; overflow of the T-shaped sand bin serves as back water; a coarse grained tailing mixture in the filtering sand tank is reversely loaded to the funnel of the sealing-tape machine or a dump truck by the scarper,conveyed to a tailing dry stacking yard or a backfill reclamation site and compacted layer by layer. The method is used for dry stacking, backfill reclamation or downhole filling of the fine grained tailings and infrastructure construction of tailing dewatering, equipment investment is reduced by 50%, energy consumption is reduced by 85%, efficiency is increased by 70%, cost is reduced by 60%, andoperation management is simple.

Description

technical field [0001] The invention belongs to the technical field of mine tailings treatment and disposal engineering, and specifically relates to a method for dehydration treatment, utilization, goaf filling and land reclamation of fine-grained tailings with high water content, and is especially suitable for tailings of -0.025mm Treatment and disposal of fine-grained tailings with particle size content ≥ 30%. Background technique [0002] The ore grade produced by my country's metallurgical mines is generally low. The ore needs to be ground and then separated by magnetic separation, gravity separation, flotation or combined processes. The mines produce about 1 billion tons of tailings every year. The moisture content of the fine-grained tailings produced by fine grinding and sorting of ores is generally as high as 75% to 90%. According to the conventional method in the past, it is necessary to requisition the land that matches the scale of the mine, specially build the t...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a dehydration solution for the problems existing in the prior art, such as small system processing capacity, complicated processing technology, high operating cost, single processing function, and difficulty in processing fine-grained tailings with a particle size of -0.025 mm or more than 30%. A fine-grained tailings sedimentation classification reverse filtration dehydration dry stacking method, which is used for dry stacking, backfill reclamation or underground filling of fine-grained tailings

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