Two Products Heavy Medium System On Coal Properties

Currently, the DenseMedium Separation is China’s major coal preparation methods, pressure heavy medium cyclone coal preparation is occupied an important market, there is pressure on heavy medium preparation methods, principles and systems research slime nature is very meaningful. In pressure heavy media systems, cyclone feed inlet material amount of slime will directly affect the work of the cyclone suspension density, viscosity, etc., thereby affecting the cyclone is working properly, the impact of separation efficiency, and therefore amount of research slime pressure heavy media systems have a very real sense secondary.In this paper, Huainan Mining Group Pan north into the wash coal preparation plant sample, there is pressure on the two production HM system slime nature study, according to the experimental requirements, the sample is divided into four sampling points, namely coal belt, cyclone feed pump outlet, cyclone overflow, cyclone underflow, qualified media barrel, were taken coal, cyclone feed pump export products, product cyclone coal and gangue, coal samples five qualified media. According to the national standard GB/T477-2008and GB/T478-2008coal samples were coal screening test, drifting test, mud trials was calculated for each size fraction yield and ash, each density level of yield and ash, coal mud of time corresponding to the amount of Di mud. By screening test data, the characteristics of each coal sample size for analysis; through the ups and downs of test data, draw washability curve, the washing of coal washability analyzed; the mud of the test data by coal, coal mud draw of the characteristic curve of the mud of the nature of coal were analyzed; according to Pan Northern Coal production work site parameters calculated secondary pressure heavy media cyclone amount of slime produced by the various stages of the system.Through trial concluded that there is pressure in the Pan North Coal production HM cyclone two systems, after the wash coal when pressure heavy media cyclone systems share44s, capable of generating a total16.68t/h amount of secondary slime which the coal used in the blender when the40s, can produce12.23t/h secondary slime amount, after the slurry pump when used Is, can produce0.64t/h amount of secondary slime, from export feeding Pump to the cyclone outlet,3s, can produce3.8lt/h secondary amount of slime when used. Through the above experimental data, the cyclone feed pump generates a relatively small amount of secondary slime, indicating the coal washing and not too much ground in a feeding pump...