Improvement of coal washing efficiency and economic perform-ance of Wuju Coal Preparation Plant through quality control of raw coal:approaches and practice
Wuju plant's coal washing efficiency and quality of products are adversely affected because of deteri-oration of run-of-mine coal and delay of raw coal quality control.Based on analysis of various process links of underground coal mining,coal haulage,coal washing,etc.,multiple measures are taken,including,among oth-ers,reduction of mining heights,preremoval of gangue from coal underground using intelligent TDS dry separ-ator,execution of automatic coal sampling and preparation online monitoring of ash of coal,as well as practice of information-based digitalized management mode.With implementation of such approaches,the plant is now possible to exercise strict control of coal quality and give early warning in case of any discrepancies,the plant is now possible to reduce the ash of raw coal by 15 percentage points on average,keep fluctuation ash of clean coal below 0.3 percentage points,and obtain a yield of clean coal of over 35%.Implementation of the comprehens-ive coal quality control approaches has led to curtailment of operating cost,less environmental pollution,and im-proved economic and social benefits.The work made in the paper may serve as a reference for other plants fa-cing similar problems.
improvement of efficiency through control of raw coal qualitywhole-process coal quality controlmining heightintelligent underground coal dry separationautomatic coal sampling and preparationonline monitoring of coal ashdigitalized management platform
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