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针对国内某大型钢铁厂1~#高炉内碱金属与锌循环富集的生产现状,在实验室条件下以反应管内环境模拟高炉内的吸附环境设计了钠和锌分别对球团矿的蒸气吸附试验,来研究高炉中循环富集的钠和锌对球团矿冶金性能的影响。试验结果表明,球团矿对于钠和锌的富集率不同,球团矿对于锌的富集吸附能力较强,钠稍弱于锌;随着球团矿对钠和锌富集倍数的增加,球团矿的平均抗压强度明显下降;气相富集的钠和锌会促进球团矿的还原性(由62.9%增加到70.3%以上);钠和锌对于球团矿的还原膨胀性能影响较弱,球团矿原样(1~#)的还原膨胀指数(RSI)为15.20%,富钠16倍(3~#)和富锌200倍(5~#)球团矿的还原膨胀指数分别为15.84%和13.63%。
Aiming at the production status of alkali metal and zinc cycle enrichment in 1 ~ # blast furnace in a large domestic steel plant, the adsorption of sodium and zinc to the pellets was designed under the laboratory conditions to simulate the adsorption environment in the blast furnace by the reaction tube. Test to study the effect of circulating enriched sodium and zinc on the metallurgical properties of pellets in a blast furnace. The results show that the pellets have different enrichment rates for sodium and zinc, and the pellets have a stronger adsorption and absorption capacity for zinc, while sodium is slightly weaker than zinc. With the increase of the enrichment ratio of sodium and zinc in pellets, , The average compressive strength of pellets decreased obviously; sodium and zinc enriched in gas phase promoted the reduction of pellets (from 62.9% to 70.3%); the effect of sodium and zinc on the reduction and expansion of pellets (RSI) of pellets with original weight (1 ~ #) of 15.20%, reduction and swelling index of 16 times (3 ~ #) and 200 times (5 ~ #) 15.84% and 13.63% respectively.