Coal gasification process is an effective way to realize clean utilization of coal.Due to the still continuous develop-ment of coal gasification technology and poor equipment performance,a large amount of solid wastes such as coal gasification ash and slag are also produced in the process of coal gasification.We introduce the source and environmental problems of coal gasification ash,and analyze the composition and mineral composition of coal gasification ash.The differences among the three methods of coal gasification ash activation(mechanical,hydrothermal and alkali fusion activation)are compared and analyzed.The research status of resource utilization of coal gasification ash is reviewed,mainly in the aspects of building materials(cement aggregate,additives),rubber and plastic fillers,ecological restoration(soil,water),component extraction and utilization(residual carbon,silicon,aluminum),preparation of pore materials(activated carbon,zeolite,carbon-silicon composite material).The existing problems and utilization trends are analyzed and prospected,respectively.
维普
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