通过烧结杯试验、烧结矿荷重软化试验、烧结矿还原度试验及烧结矿低温还原粉化试验，系统地研究了兰炭用作烧结燃料对烧结矿冶金性能的影响。结果表明，兰炭的配加、碱度的增加对烧结矿的成品率、品位和转鼓指数及粒度并未产生明显的负面影响；兰炭加入比例为30%、碱度为1.82时，可以提高烧结矿的转鼓强度，此时的烧结矿软化性能也最好；随着兰炭替代比例的升高，烧结矿碱度逐渐增加，导致烧结矿中FeO质量分数逐渐下降，这对烧结矿还原性和低温还原粉化具有一定的改善作用。综合考虑兰炭和碱度对烧结过程及烧结矿冶金性能的影响，用兰炭作为烧结燃料在工艺上是可行的，而且兰炭加入比例为30%、碱度为1.82时效果最佳。
Semi-coke used as sintering fuel was studied through the sintering cup experiment,sinter load softening ex-periments,sinter reduction test and low-temperature sinter reduction powder experiment. Emphasis was mainly focused on the influence of semi-coke substitution ratio on sinter metallurgical properties. The result shows that,the addition of semi-coke and the increase of basicity do not have obvious negative impact on the sinter yield,grade,the drum index and grain size. When the content of semi-coke is 30%and the basicity is 1.82,the drum strength as well as the softening property of sinter can improve. In addition,with the increase of semi-coke replacement ratio,the sinter basicity increas-es,leading to a decrease of the FeO content in sinter which is helpful for the sinter reducibility and low-temperature re-duction disintegration. Considering the roles of semi-coke and alkalinity in sintering process and the influence of sinter metallurgical properties,the application of semi-coke as fuel in sintering process is feasible,and the optimum condition is 30%addition of semi-coke and the basicity of 1.82.
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