对攀钢资源综合利用中试线试验生产中出现的高温金属化球团粘结问题进行分析,认为其粘结机理为低熔点的硅酸盐相粘结和钛赤铁矿的晶间固结,而金属化球团再氧化是这2种粘结的诱因.开展了不同防氧化方式对球团金属化率的影响试验,选用氮气保护方法进行了现场验证.结果表明:氮封方法可以有效防止高温金属化球团粘结,确保了金属化球团生产试验过程的顺利进行.
In this paper,the problem of metallized pellet bonding at high temperature,which appeared in the pilot production of Panggang pilot plant for resources comprehensive utilization,is analyzed.It was found that low melting silicate phase bonding and titanomaghemite intergranular consolidation led to the metallized pellet bonding,and both of them were caused by metallized pellet reoxidation.Experiments were carried out to investigate the influence of different anti-oxidation ways on pellet metallization rate,and to verify it with the method of nitrogen protection.Results show that metallized pellet bonding could be avoided effectively by nitrogen protection,which could ensure smooth pilot production of metallized pellet.
参考文献
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