Control of Particulate Triboelectrification of Coal and Minerals by Chemical Pretreatment
In order to improve the efficiency of dry coal triboelectrostatic beneficiation, chemical surface modification was used to control the triboelectrification performance of coal and mineral particulates. The results indicate that the charge-to-mass of coal positively is increased after surface modification with absorption of kerosene and changed to negative directions with absorption of cation chemical respectively. After chemical conditioning, on the whole, the characteristics of the main ash forming minerals show the charge magnitude increased negatively with absorption of organic additives, and positively with absorption of cation additives respectively. The variation directions of dielectric constant agree with the change trend of charge-to-mass for most conditions. The changes of triboelectrification mainly due to the particles adsorbing additives or encapsulated by additives, and then the surface electrical properties of coal are changed.
Coal powder Mineral particles Triboelectrification Triboelectrostatic separation Chemical pretreatment
Wang Haifeng Chen Qingru Zhang Xinxi Tan Zhihai Wang Shuai Zhou Nianxin
Key Laboratory of Coal Processing and Efficient Utilization, China University of Mining & Technology School of Chemical Engineering & Technology, China University of Mining & Technology South Sanhuan Road, Xuzhou, 221116 China
国际会议
沈阳
英文
528-532
2009-08-27（万方平台首次上网日期，不代表论文的发表时间）