Recycling Waste from Coal and Petroleum Coke Production

The recycling of solid industrial waste-coal sludge and petroleum coke breeze-is considered. The advantages and disadvantages of the main processing methods are evaluated. The most promising technique is shaping with binder. The strength of composites consisting of coal dust and coke breeze is investigated. Heavy tar and petroleum pitch are used as sintering additives in the composites. The sintering properties (according to the Roga method) are investigated as a function of the content of tar or petroleum pitch in the mixture (over the range from 1 : 0 to 0 : 1). The results show that the composites' strength and resistance to abrasion are improved, up to some limit. In the presence of 20 wt % heavy tar, the Roga index RI = 62; for composites containing 30 wt % pitch with coke breeze or with coal dust. When the tar content is 10-35 wt % or the petroleum pitch content is 5-55 wt %, the Roga index meets the technical requirements (RI > 50).