高还原势气氛下烧结矿低温还原粉化试验研究

On the low temperature reduction degradation of sinter in high reduction potential atmosphere

摘要: 在高还原势气氛下进行烧结矿的低温还原粉化试验，考察 RDI_+6.3、RDI_+3.15 和 RDI_-0.5 的变化情况，分析不同还原气氛对烧结矿低温还原粉化的影响规律，探究烧结矿在氧气高炉上部的粉化行为. 结果表明：烧结矿在氧气高炉气氛下的低温还原粉化率高于在传统高炉气氛下的低温还原粉化率，但其 RDI_+3.15 仍高达 82.7 %；随着还原气氛中 CO 和 H₂ 含量的提高，烧结矿的低温还原粉化率明显上升.

Abstract: The low temperature reduction degradation experiments have been carried on in high reduction potential atmosphere. By examined changes of RDI_+6.3、RDI_+3.15 and RDI_-0.5, the pulverization behavior of sinter in upper part of the oxygen blast furnace have been explored. The results showed that: the low temperature reduction degradation of sinter was significantly improved in oxygen blast furnace atmosphere, but the RDI +3.15 of sinter in oxygen blast furnace atmosphere was measured up to 82.7 % which would not affect the production of oxygen blast furnace. W ith increasing of H₂ and CO contents in the reducing atmosphere, the low temperature reduction degradation of sinter was significantly improved.