Concentration method for floatation tailings and concentration device

Abstract

The invention discloses a concentration method for floatation tailings and a concentration device; the concentration method comprises the following steps: coal slime water enters a tailing thickener through a feeding tube; a flocculating agent is mixed in coal slime ash through a flocculating agent dosing tube which is communicated with the feeding tube; the coal slime ash mixed with the flocculating agent is concentrated and cleared in the tailing thickener; a flocculating agent dosing point is arranged at the front edge of the tailing thickener; before the flocculating agent is mixed in the coal slime ash, a coagulating agent is mixed in the coal slime ash by a coagulating agent dosing tube communicated with the feeding tube; a coagulating agent dosing point is arranged in front of the flocculating agent dosing point by L meter; L=10*(Q / X) / (3.14*R2*3600), wherein Q is coal slime water flow, the unit of which is m<3> / h; X is the number of the feeding tubes; R is the radius of each feeding tube, the unit of which is m. The concentration method uses the time difference (10s) of the addition of the coagulating agent and the flocculating agent to lead the floatation tailing to be absorbed on few, scores of or even more group particles under the action of the flocculating agent; and mineral grains are connected together under the bridging action to form big loose and porous flocculus.

Description

technical field [0001] The invention relates to a method for concentrating and clarifying coal slime water in a coal washing process, in particular to a method for concentrating flotation tailings in the process of coal slime water treatment. Background technique [0002] The task of slime water treatment is to make the slime into a product by means of flotation or recovery; to obtain circulating water for production reuse by means of concentration, filtration, clarification, etc., to realize "recycling in the slime factory, washing water closed loop"; And to meet the requirements of environmental protection. At present, in some coal washing plants, due to the unsuitable determination of the slime water preparation process, the flotation tailings cannot be precipitated quickly and effectively after entering the thickener, resulting in the accumulation of fine mud, which cannot ensure that the washing water is stable at a low concentration state, thus affecting the floatation...

AI Technical Summary

Problems solved by technology

However, at present, the addition of coagulant and flocculant to the concentrator is mostly based on experience, and there is no basis for the dosing method and the arrangement of dosing points. Sometimes the argillaceous shale content in the coal slime is high, so washing often occurs. Unstable water concentration

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