Analysis and countermeasure of the factors of G_(R.I.) value dropping of clean coal in Huaibei Coal Preparation Plant;

The correlation of ash and gross calorific value of Penghu clean coal;

The methods of coal preparation management was adopted in the Laohutai Coal Preparation Plant to enhance the product return-ratio and to meet the market,and the conventional transformation method had been broken and the quality of clean coal was guaranteed.

Reforming present plan ash of smelting cleaned coal with the rule of the highest production rate;

Faced the situation of cleaned coal being bought from various feeder and with unsteady quality some measures are adopted to strengthen the management of cleaned coal and coking and improve technological equipment.

Due to the density different of cleaned coal and impurity, the greater part of light and soft impurity float upper at the coal in the impurity separator.

Through analysing of the model test on γ online ash content appratus measuring the comparison of ash content of the jig product , the paper discusses the influence of the percent of water in fine coal on the accuracy of γ online ash content apparatus, and suggests the proper installing position of ash content apparatus and the effect of the site application.

The results of the flotation experiments shows that the ash content of the washed coal is only half of the coal slurry flotation without comminution by high pressure water jet,and the total sulfur .

A Study of Prediction Slagging for Utility Waste Water CWS and Common CWS Based on Fuzzy Multifactorial Decision;