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为扩大首钢京唐504 m2带式焙烧机的原料适应性,在原有配料结构(以磁铁精矿为主)的基础上配加部分赤铁矿粉进行了实验室焙烧试验,共设计了8组配矿方案用于生产磁-赤型球团矿。结果表明:8组方案的球团矿品位均超过65.71%,平均抗压强度均达到2 500N/P以上,还原膨胀率最低的达到17.43%。采用球团综合评价法得出:70%秘鲁磁铁矿粉+30%地方磁铁矿粉的配料方案为最优;当秘鲁磁铁矿配比不低于70%,地方磁铁矿配比不超过30%,两种赤铁矿配比总和不超过10%时,所生产的磁-赤型球团矿可满足超大型高炉的入炉标准,从而为大型带式焙烧机的生产配料提供了更多选择。
In order to expand the raw material adaptability of 504 m2 belt roaster in Shougang Jingtang, a batch of hematite powder was added on the basis of the original ingredients structure (mainly based on magnetite concentrate), and a total of 8 groups With ore program for the production of magnetite - red pellets. The results showed that all the pellets of the eight groups of projects had the grade of more than 65.71%, the average compressive strength reached more than 2 500N / P and the lowest rate of reduction and expansion reached 17.43%. The pellet comprehensive evaluation method shows that: 70% Peruvian magnetite powder + 30% local magnetite powder is the best; when Peruvian magnetite ratio is not less than 70%, the local magnetite ratio Not more than 30% and the sum of the two types of hematite does not exceed 10%, the produced magnetite pellets meet the requirements of the very large blast furnaces to be used for the production of large-scale belt calciners More choice.