A multi-stage sedimentation non-rake thickening device including a laminar diversion sedimentation screen

Abstract

The invention relates to a multi-stage sedimentation rakeless concentrating device comprising a layered sedimentation diversion screen. A diversion sedimentation screen and a magnetic gathering sprinkler, the laminar diversion sedimentation screen includes a plurality of third diversion sedimentation subgroups arranged downwards along the outer wall of the central tank, and in the two adjacent sedimentation tanks, The lower settling tank obtains the coal slime water flowing out of the previous settling tank, and each third diversion settling subgroup includes a settling tank, and the bottom plate of the settling tank is provided with a third underflow discharge port for discharging the settled fine coal slime, and complete settlement The final water is output from the third overflow discharge pipe at the output end of the lowermost third flow settling subgroup. In the diversion settlement area of ​​the present invention, layered diversion diversion sedimentation sieves are used to sequentially pass through all the third diversion settlement subgroups, thereby realizing step-by-step settlement, and the fine coal slime and settled water are discharged from different pipes. achieve concentration.

Description

technical field [0001] The invention relates to the field of coal slime water treatment, in particular to a multi-stage subsidence non-rake concentrator comprising a layered subsidence diversion screen. Background technique [0002] In the coal washing process, the slime water treatment, as the finishing link of the washing process, is the key to the effective collection and utilization of coal slime and the closed cycle of washing water, and the thickening device as the carrier of coal slime water treatment and the key equipment for processing has been obtained It is widely used and is of great significance to the closed circulation of washing water, the full utilization of underflow concentrate and environmental protection. [0003] With the integration and large-scale of coal washing plants, the processing capacity has been greatly increased, and the output of coal slime water and the content of fine slime in coal slime water have also increased significantly. Some equip...

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Problems solved by technology

[0003] With the integration and large-scale of coal washing plants, the processing capacity has been greatly increased, and the output of coal slime water and the content of fine slime in coal slime water have also increased significantly. Some equipment has reached the specifications of 45m and above, but due to the finer fine mud and the increase in processing capacity, the settlement time period is poor, and the settlement effect is poor. The fine mud in the washing circulating water cannot be effectively removed, which will cause coal The quality of washing is seriously affected, so many coal preparation plants have added two-stage concentration or even three-stage concentration to further purify the washing circulating water, which will take up a lot of land, and there are still residual flotation stages in the slime water that have not been completely The recovered coal foam, resulting in the waste of clean coal, resulting in economic losses

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