The effects of raw material particle size

fusing agent addition(CaO

Fe2O3 and MgO)and coal blending ratio on ash fusion characteristics were experimentally studied.The results show that

the ash fusion temperature of briquette with raw material particle size larger than 3.2mm was significantly higher than that with particle size less than 3.2mm.The ash fluid point of the briquette can decrease to lower than 1 350℃ when(1)the low melting point coal occupied 90% to 98%of the briquettes;(2)the proportion of CaO was 8.09% to 10.92% and 5.01% to 8.07% in the two high ash fusion temperature coals;(3)the addition of Fe2O3 was larger than 9.26% and 4.95%.MgO had little effect on reducing the ash fluid point.The low-melting-point eutectic mixtures formed by reactions between the compounds in ash mainly caused the drop in ash fluid point.