Concentration and dehydration process of very fine tailings

Abstract

The invention relates to a concentration and dehydration process of very fine tailings. The process is characterized by comprising the following steps: (1) stirring and slurrying the tailings ore pulpto obtain suspended ore pulp; (2) carrying out slag separation on the slurried ore pulp to remove impurities; (3) preparing a flocculating agent and adding into the ore pulp subjected to slag separation, and evenly stirring and mixing twice; (4) mixing the flocculating agent with and the ore pulp, and concentrating the ore pulp by using a high-efficiency thickener; (5) conveying the concentratedunderflow to a filter press for carrying out pressure filtration, and overflowing and clarifying to enable the effluent to be used as industrial circulating water. After the scheme is adopted, the water content of the tailings is greatly reduced; a filter cake is good in looseness, does not need to be scattered, does not stick to a bucket when being shoveled by a forklift, does not stick to a truck bed when being transported by a truck and unloaded, and does not drip and leak in transit; furthermore, the concentration and dehydration process meets the quality requirements of an iron correctorused in cement industry, and increases 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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