Research on application of surfactant to dewatering of fine clean coal : Wu, Y. and Cai, Z. Jingxi Huagong, 2002, 19, (6), 318–320. (In Chinese)

Abstract

Dewatering of fine clean coal is the most difficult problem of the process of coking coal preparation.Applying auxiliary filtering agent to the filter cake to reduce the moisture content of filter cake is an efficient and economic way.This treatise interprets the research on application of surfactant as an auxiliary filtering agent for enhancing the dewatering of fine clean coal and with remarkable efficacy.The dewatering values of two different kinds of coal,in which sulfonate type surfactant is applied separately in laboratory tests,reached 4.90% and 5 96%.The optimized dewatering value of industrial practice in Datun Coal Preparation Plant reaches 6.08% by applying sulphate type surfactant.