《钢铁》2019年第12期 | 转底炉对转炉污泥的处理
王飞，毛瑞，茅沈栋
（江苏省（沙钢）钢铁研究院铁前研究室，江苏 张家港 215625）
摘要： 为了合理利用转炉污泥，减少炼铁流程中有害元素的富集，对转底炉处理转炉污泥进行了研究。结果表明，转炉污泥配入混合料后对生球质量影响较小，但可以提高干球的强度，因此可以减少球团在转运和预热阶段的破裂、粉化情况。混合料的碱度和碳质量分数是影响金属化球团质量的关键因素，而转炉污泥配入混合料后会对它们产生较大影响。将混合料的碱度控制在0.75~0.85，碳质量分数控制在11%~12%，可以保证金属化球团具有所需的强度和金属化率。工业试验过程中，转炉污泥配比从8%逐渐提高至24%，通过控制各原料配比来调节碱度和碳质量分数，金属化球团的质量能够满足生产需要。
关键词： 转炉污泥；转底炉；金属化球团；碱度；碳质量分数
Utilization of converter sludge by rotary hearth furnace
WANG Fei，MAO Rui，MAO Shen-dong
（Ironmaking Group， Institute of Research of Iron and Steel， Jiangsu Province（Shasteel）， Zhangjiagang 215625， Jiangsu， China）
Abstract：To make reasonable use of converter sludge and reduce the concentration of harmful elements in iron making process，the utilization of converter sludge by rotary hearth furnace was studied. Converter sludge had little effect on the quality of green balls，but it could increase the strength of dry balls，which could reduce the cracking and pulverization of pellets during transport and preheating process. The basicity and carbon content of raw materials were the key factors affecting the quality of metallized pellets，which were significantly affected by converter sludge. However the metallization rate and strength can be guaranteed by control the basicity between 0.75-0.85 and the mass percent of carbon between 11%-12%. The proportion of converter sludge was gradually increased from 8% to 24% during the industrial testing. The basicity and carbon content were adjusted by controlling the ratio of each raw material，and metallized pellets could meet the needs.
Key words：converter sludge；rotary hearth furnace；metallized pellet；basicity；carbon mass percent