不同粒度返矿镶嵌烧结技术的研究及工业应用

Research on MEBIOS technology of different particle sizes and its application

返矿镶嵌是一种优化烧结过程返矿利用效率的工艺。根据中天钢铁的烧结用料情况,提出应用返矿镶嵌工艺的技术路线,并通过烧结杯试验研究不同粒度返矿镶嵌的效果。结果表明:+1 mm和+3 mm粒级的返矿镶嵌均有利于改善烧结矿的产、质量;+1 mm粒级的返矿镶嵌更有利于提高烧结机利用系数,提产幅度为6%;但一定占比(20%)的+3 mm粒级的返矿用于镶嵌更有利于改善烧结矿的质量,使转鼓指数、成品率、固体燃料消和RDI指标全面改善。在试验研究的基础上,进行返矿镶嵌烧结技术的工业应用,结果表明:在+3 mm粒级的返矿镶嵌比为25%时,废气温度提高6.1℃,提产幅度为2.8%。

MEBIOS is a process to optimize the utilization efficiency of return ore in sintering process. According to the materials for sintering of Zenith steel group Co.,Ltd.,the technology by using MEBIOS process is put forward,and the effect of MEBIOS of different particle sizes is studied through the sintering cup test. The results show that the MEBIOS of +1 mm and +3 mm is beneficial to improve its production and quality of sinter,and the MEBIOS of +1 mm is more conducive to improving the utilization coefficient of sintering machine with an increasing output rate of 6%. However,a certain proportion(20%) of +3 mm return ore used for inlaying is more conducive to improving the quality of sinter,while the drum index,yield,solid fuel consumption and RDI index are comprehensively improved. On the basis of the research,the industrial application of the MEBIOS process device of sintering shows that the temperature of waste gas is increased by 6.1 ℃ and the yield is increased by 2.8% when the proportion of MEBIOS of +3 mm is 25%.