Utilizing system for coal washing circulating water

Abstract

The invention relates to a water circulating system and especially relates to a utilizing system for coal washing circulating water. The utilizing system comprises a buffering cylinder, a settling pond and a water pool; the buffering cylinder is used for receiving flotation tailings; the settling pond is connected with the buffering cylinder; the water pool is used for collecting discharged water;upper water in the settling pond can overflow into the water pool; a water conveying pipe is jointed between the water pool and a dielectric cylinder; a sinking pump is arranged in the water pool; anoutput end of the sinking pump is connected with the water conveying pipe; a water level indicator is arranged in the dielectric cylinder while an alarm is arranged on the exterior of the dielectriccylinder; a solenoid valve for controlling water flow is arranged on one end of the water conveying pipe close to the dielectric cylinder. The utilizing system for coal washing circulating water has the advantages that water during the coal washing process can be recycled, waste of water resource can be avoided and processing cost can be lowered.

Description

technical field [0001] The invention relates to a water circulation system, in particular to a coal washing circulation water utilization system. Background technique [0002] Coal washing is an indispensable process of coal deep processing. The coal directly mined from the mine is called raw coal. Raw coal is mixed with many impurities during the mining process, and the quality of coal is also different. Coal with small internal ash and large internal ash is mixed in Together. Coal washing is an industrial process that removes impurities in raw coal, or classifies high-quality coal and low-quality coal. [0003] refer to figure 1 , the main steps of coal washing are: screen the raw coal through the first screener 1, so that the raw coal with a particle size larger than the set value enters the crusher 11 for crushing, and the crushed raw coal and the raw coal with a particle size smaller than the set value enter the dense medium together. The cyclone 12 separates the cle...

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Problems solved by technology

[0003] refer to figure 1 , the main steps of coal washing are: screen the raw coal through the first screener 1, so that the raw coal with a particle size larger than the set value enters the crusher 11 for crushing, and the crushed raw coal and the raw coal with a particle size smaller than the set value enter the dense medium together. The cyclone 12 separates the clean coal mixed with the coal washing medium and the gangue mixed with the coal washing medium through the dense medium cyclone 12, and then removes the medium through the medium removal screen 13 to obtain the water-containing coal after the separation. clean coal and water-containing gangue, and recover the qualified medium to the combined media cylinder 14 at the same time. Carry out dehydration treatment 15 with water-containing gangue to obtain clean coal and gangue, the clean coal is directly output, and the gangue enters the next process (not shown in the figure), wherein the liquid detached from the water-containing clean coal will enter the flotation device 16 for flotation processing, sorting out the flotation tailings, after dehydration, the flotation tailings directly enter the sedimentation tank 17 for sedimentation, and then squeeze and output the coal slime through the filter press 18, and the water in the whole dehydration and deintermediation process will be Directly discharged, resulting in a waste of water resources; at the same time, because the flotation tailings are directly passed into the sedimentation tank, when the water level is higher than the sedimentation tank, the water will overflow, and a small amount of flotation tailings will be carried during the overflow process. Mine discharge, causing great waste

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