Preparation method and device of high-concentration whole tailings slurry

Abstract

The present invention discloses a preparation method and device for high-concentration whole tailings slurry for mine filling. The preparation method comprises the processes such as dehydration, drainage, storage, mud making, etc applied to the low-concentration whole tailings. The processes are accomplished in the same sand silo according to the following steps: the low-concentration whole tailings discharged from mills are directly delivered into the sand silo to be dehydrated; the stationary primary water at the upper part of the sand silo is discharged from top to bottom layer by layer; when the tailing content in the discharge water reach the preset index ranging from 0.1 to 10g / l, the water discharge is stopped and the whole tailings in the sand silo are stored locally in the silo to be prepared for use; the comprehensive fluidization slurry making is applied to the whole tailings slurry in the sand silo through pressure gas so as to form the high-concentration slurry, the mass fraction of the tailings in which reaches 70 to 75 percent; then the high-concentration slurry is discharged into a mixing equipment to be mixed with the cementing material so as to prepare the binding backfill slurry. The present invention integrates the processes such as the dehydration, drainage, storage, slurry making, etc in a device to accomplish them, thus greatly shortening the preparation process, simplifying the technique and equipments and lowering the preparation energy consumption and cost.

Description

technical field [0001] The invention relates to a method and a device for preparing high-concentration full tailings slurry for mine filling. Background technique [0002] When using whole tailings as mine filling material, it is necessary to carry out main processes such as dehydration, drainage, storage, and pulping of low-concentration tailings discharged from the dressing plant, and prepare them into high-concentration materials that can be transported to mixing equipment and cemented for mixing. Full tail mortar. Full tailings filling can fully utilize mine tailings waste, realize waste recycling, and eliminate the negative impact of waste discharge on the global environment. However, only full tailings filling under high concentration conditions has industrial application value. The existing high-concentration full tailings preparation process at home and abroad adopts a multi-stage process, and a variety of devices and equipment complete the dehydration, drainage, s...

AI Technical Summary

Problems solved by technology

This kind of technological process is more complicated, requires many devices, and consumes a lot of energy; the solid tailing sand material also needs to be unloaded to the intermediate silo by a front loading machine, and then transported to the mixing tank through a feeder and a belt conveyor, and then mechanically processed after adding water again. Stirring and pulping

Therefore, the preparation process of the high-concentration full tailings slurry used for mine filling in the prior art is complicated, and it needs to change warehouses many times and use multiple sets of equipment to complete it. High energy consumption and high cost

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