Experimental study on upgrading of gasification slag through classification and separation

For realizing comprehensive utilization of gasification slag, less occupation of land area and reduction of environmental pollution, test is made on upgrading of the slag using high-efficiency fine sizing screen and spiral separator. Test results show that the screen can work remarkably well with an overall efficiency of 82.58% and on ash and yield of the screen′s oversize material being 32.96% and 41.18% respectively; the spiral separator is well fit for treating the > 0.125 mm feed, and the ash of cleaned product can be reduced to 22.35%. It is proposed that in future industrial operation, the use of a combined process made up by spiral separator plus high-efficiency sizing screen can be considered.