Research progress on coal gasification fine slag deashing and carbon extraction technology
The composition and morphology of coal gasification slag were analyzed,and the current status of its use as fuel,adsorbent material,industrial material and catalyst material was reviewed with respect to the characteristics of carbon resources in the gasification fine slag.The classification and principle of gasification fine slag deashing and carbon extraction technology were discussed,and the research status and progress of related technologies in recent years were summarized.At present,the physical method of ash removal and carbon extraction was mainly flotation method and gravity separation method,the two methods had their own characteristics,but both methods had problem of low deashing efficiency.The chemical method used acid and alkali washing to treat the gasification fine slag,the carbon and ash separation effect was good,but the process would consume a large number of acid and alkali reagents.In the future,the mechanism and characteristics of carbon and ash separation of gasification fine slag should be further explored to develop reasonable and economic separation technology for ash removal and carbon extraction;at the same time,the development of combined process of coupling physical and chemical methods should be strengthened.
coal gasification slagcarbon resourcesdeashing and carbon extractionresource utilization
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维普
