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文中研究了广东几种褐铁矿粉加热时的行为,结晶水排除温度为253～342℃,热重损失为10～14%。体积收缩率达15～24%,褐铁矿粉烧结时需燃料量较高,品位能自然富集,料层温度偏低,堆比重小而成品率低,料层收缩严重,物料不呈熔融状难于烧结成块等特点。在目前生产条件下,采用稍大于磁铁矿粉烧结的燃料加入量,适当延长点火与保温时间、厚料层操作,生产高碱度烧结矿以及配加少量的磁铁矿粉,转炉渣等措施,可以有效地提高烧结矿的产质量。
In this paper, the behavior of several limonite powders in Guangdong was investigated. The temperature of crystallization water was 253 ~ 342 ℃ and the thermogravimetric loss was 10 ~ 14%. Volume shrinkage rate of 15-24%, limonite powder sintering required high fuel content, natural enrichment of the grade, the material layer temperature is low, the proportion of small stacks and the yield is low, serious contraction of the material, the material is not melting Difficult to shape into a block and so on. In the current production conditions, the use of slightly larger than the sintering of magnetite powder fuel addition, the appropriate extension of ignition and holding time, thick layer operation, production of high alkalinity sinter and with a small amount of magnetite powder, converter slag, etc. Measures can effectively improve the production and quality of sinter.