Review of the characteristics and graded utilisation of coal gasification slag

作     者：Xiaodong Liu Zhengwei Jin Yunhuan Jing Panpan Fan Zhili Qi Weiren Bao Jiancheng Wang Xiaohui Yan Peng Lv Lianping Dong Xiaodong Liu;Zhengwei Jin;Yunhuan Jing;Panpan Fan;Zhili Qi;Weiren Bao;Jiancheng Wang;Xiaohui Yan;Peng Lv;Lianping Dong

作者机构：State Key Laboratory of Clean and Efficient Coal UtilizationTaiyuan University of TechnologyTaiyuan 030024China Institute of Coal Chemical Industry TechnologyNational Energy Group Ningxia Coal Industry Co.Ltd.Yinchuan 750411China China Energy Investment Group Co.Ltd.Beijing 100011China State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical EngineeringNingxia UniversityYinchuan 750021China College of Mining EngineeringTaiyuan University of TechnologyTaiyuan 030024China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2021年第34卷第7期

页      面：92-106页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：financially supported by the National Key Research and Development Program of China(2019YFC1904302) Foundation of State Key Laboratory of High-efficiency Utilisation of Coal and Green Chemical Engineering(2021-K81) the Technology of Coal-to-liquids Research Institute of National Energy Group(010)。 

主　　题：Coal gasification slag Morphological characteristics Dehydration Separation Comprehensive utilisation 

摘      要：The characteristics of the energy structure of rich coal,less oil and less gas,coupling with a high external dependence on oil and natural gas and the emphasis on the efficient and clean utilisation of coal,have brought opportunities for coal chemical industry.However,with the large-scale popularisation of coal gasification technology,the production and resulting storage of coal gasification slag continue to increase,which not only result in serious environmental pollution and a waste of terrestrial resources,but also seriously affect the sustainable development of coal chemical enterprises.Hence,the treatment of coal gasification slag is extremely important.In this paper,the production,composition,morphology,particle size structure and water holding characteristics of coal gasification slag are introduced,and the methods of carbon ash separation of gasification slag,both domestically and abroad,are summarised.In addition,the paper also summarises the research progress on gasification slag in building materials,ecological restoration,residual carbon utilisation and other high-value utilisation,and ultimately puts forward the idea of the comprehensive utilisation of gasification slag.For large-scale consumption to solve the environmental problems of enterprises and achieve high-value utilisation to increase the economic benefits of enterprises,it is urgent to zealously design a reasonable and comprehensive utilisation technologies with simple operational processes,strong adaptability and economic benefits.