Abstract: The pot grate sintering tests were carried out with the variation of sintering fuel structure and the effect of semicharcoal substituting for coke breeze on sintering performance was investigated. The experimental result showed that the proper substitution ratio of semicharcoal for coke breeze varied with the sintering fuel structure. As the sintering fuel ratio was 4.6%,semicharcoal substitution ratio reached 20% and sinter had better performance. When fuel ratio was 5.2%,the proper substitution ratio of semicharcoal could be increased to 40%. On the circumstance that sinter performance was guaranteed,the utilization of semicharcoal as sintering fuel was an effective method to decrease sinter cost.