Results of the Demonstration Operation, the Demonstration and Dissemination Project for a Coal Preparation System, Model Project for an Environmentally Harmonized Coal Utilization System

摘要

This model project had been carried out since 1997 Japanese fiscal year (JFY) to 2001 JFY by the subsidy from New Energy and Industrial Technology Development Organization (NEDO) in order to demonstrate the effect of the new coal preparation technology system on de-ashing and de-sulfurizing of high-sulfur raw coal. The system consists of "VARI-WAVE" air-pulsated jig, high-shear mixer, flotation cells, tailing thickener, pressure filter, central control facility and so on, with the throughput of 450 thousand ton per annum. The demonstration operation had been conducted since November 2001 to March 2002, at Jinjia Coal Preparation Plant, Panjiang Coal & Electric Power (Group) Co. Ltd., Guizhou Province, People's Republic of China. High sharpness of separation was obtained by "VARI-WAVE" air-pulsated jig owing to the trapezoidal pattern of water pulsation. Flotation of semi-anthracitic coal with low floatability was realized by use of high-shear mixer in advance. Also new type pressure filter has been operated with no trouble. By the demonstration operation, target values (de-sulfurizing ratio, de-ashing ratio and yield) stated in the Basic Agreement signed by Japanese and Chinese governments had been all verified.