Researched rheological behavior of slime and tested the application reliability of this pump by carrying out feasibility test and imitating project test with KK139 pump made in German,In this experiment,the moisture scope of slime changed from 27.

Characteristic of fluidized bed mixing combustion by using slime and refuse mixture is analysis.

This technology is used to cooperate development the largest CFB boiler using slime as fuel by Zhejiang University and Wuxi Boler Plant.

Based on the study of the rheological property of Nantun coal washed sludge, the design of coal washery sludge pump system in Nantun power plant for a 220t/h CFB boiler is introduced.

According to the situation of our country, an effective way of clean coal production is to increase the ratio of coal washing, which inevitably will generate a large amount of residues including coal washery sludge and gangue causing secondary pollution to the environment.

The pressure filtration process of salt sludge was optimited by taking measures such as adjusting the ratio of sludge to water,preheating the water for washing sludge by steam to raise its temperature,perfecting operation rules and strengthening management and thus the salt content in salt sludge was reduced from 60 to about 15 g/L,and good environmental effects and economic effects were obtained.

To thinking how to use washing coal and middle coal,it gives some suggests that the project should be devided into two parts.

The natural deposit of washing coal water be changed to a new treating process line which includesof prase, floatation machine, filter,etc,thus the recovery of coal mud and the closing cycle of washing water canbe achieved in ZhenXing coking CO.

The article gives an analysis on present situation of coal washing, clarifies the necessity to give a reform on present floatation and pressure filtration system.