Concentration and dehydration process of ultra-fine tailings

Abstract

The invention relates to a process for concentrating and dehydrating ultra-fine tailings, which is characterized in that the process comprises the following steps: 1) stirring the tailings slurry to make it into a suspended slurry; Slag separation to remove sundries; 3) Preparation of flocculant, adding to the slurry after separation of slag and stirring twice; 4) Mixing of flocculant and pulp, using a high-efficiency thickener to concentrate the pulp; 5) Concentration underflow It is sent to the filter press for pressure filtration, and the overflow is clarified and used as industrial circulating water. This solution greatly reduces the moisture content of the tailings, the filter cake is loose and does not need to be broken up, the forklift shovel does not stick to the bucket, the car transport unloads the material without sticking to the box, and there is no dripping during transportation. The quality requirements of the calibrator improve the utilization rate of tailings resources.

Description

technical field [0001] The invention relates to a dehydration process, in particular to an ultrafine tailings concentration dehydration process, and belongs to the technical field of mineral processing. Background technique [0002] Most iron ores are poor and miscellaneous, and the iron minerals are finely distributed, requiring multi-stage wet grinding and multi-stage sorting. During the sorting process, water needs to be added to adjust the slurry. The unloading of the concentrate requires pressure water to assist flushing before it can be sorted. Higher-grade iron concentrate is produced to achieve the effect of increasing iron and reducing impurities. Therefore, the iron concentrate and tailings are in the form of slurry containing a large amount of water, which must be concentrated and dehydrated to meet the needs of subsequent transportation, storage and utilization. [0003] Mineral dressing fine-grained wet tailings is the main form of tailings produced by mineral p...

AI Technical Summary

Problems solved by technology

[0004] The technical problems in the current tailings treatment method are: the tailings produced after multi-stage grinding and sorting are very fine in size, large in specific surface area, and not easy to settle, so the output concentration is high in cost, and it is difficult to form a stable mine in front of the dam. The dry slope section affects the safety of the dam body; the efficiency of conventional tailings filtration and dehydration is low, the filter cake moisture is generally above 20%, the viscosity is high, and the looseness is not enough, it is easy to stick in the funnel and the mine bin, resulting in poor ore discharge and affecting For loading efficiency and comprehensive utilization, it is necessary to study a technically reasonable, economically feasible process, reduce moisture, and solve the problem of difficult dehydration of ultra-fine tailings, expand the use and expand the amount of utilization. In view of the current situation, there is an urgent need for a new Solution to the technical problem

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