WANG Yuming;ZHANG Aiqing;

• 1:Environmental Protection Agency
• 2:Datong Coal Mine Group

Abstract：

In order to deal with the difficult sedimentation slime water,high ash fine-grained slime water treatment in coal preparation plant of Datong Coal Mine Group is adopted as the object of this study. The main factors,variation of water quality and mineral composition of high-ash fine-grained slime water during coal preparation were introduced.The influence of main factors on the flocculation and sedimentation of coal slime water was studied,and the measurements to solve the difficult settling coal slime water were proposed. The results show that the water quality requirements of the slime water with difficult subsidence is improved to be closed circuit circulation by adding a mixed reaction tank,reducing the concentration of the pool to remove the load,extending the length of the thickened pool hydraulic retention time,the slime water conditioning,amphiphilic and positive organic polymer flocculant dosing and other measurements.

Key Words： coal preparation plant;difficult settlement;coal slime water;flocculant

Abstract:

Keywords:

Foundation:

Authors: WANG Yuming;ZHANG Aiqing;

DOI: 10.13226/j.issn.1006-6772.2018.03.024

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