邯宝2号高炉锌平衡的研究

Research on zinc balance for No.2 blast furnace of Handan Iron and Steel Company

通过分析邯宝2号高炉锌的走向及平衡,计算得出:2号高炉的锌负荷为0.555 9kg/t,入炉原料中烧结矿是高炉锌的主要来源,烧结矿带入高炉锌的比例达到81.76%;2号高炉的排锌率仅为46.12%,高炉正处于锌的积蓄期,有可能使炉况出现波动和风口上翘。严格控制烧结矿、球团矿的锌含量是解决锌危害的有效措施。随着焦炭中ZnO含量的升高,焦炭的CRI提高,CSR降低;随着ZnO含量的提高,烧结矿和球团矿RDI+6.3下降,RDI-3.15和RDI-0.5均上升,但烧结矿粉化比球团矿严重。

The Zn trend and balance for No. 2 blast furnace of Handan Iron and Steel Co. were analyzed in this paper. The results showed that Zn load of No. 2 blast furnace was 0. 555 9 kg/t. And in blast furnace, 81.76 % Zn came from sinters, which were the main alkali metal source in charging materials. The Zn removing rate of No. 2 blast furnace was 46. 12 %, so the blast furnace was in a phase of Zn savings, which might make the blast furnace＇s production undulated and the tuyeres burned. The countermeasure to the harm of Zn was to control the content of Zn in sinters and pellets strictly. As increasing the content of ZnO in cokes, CRI would be improved and CSR be reduced. RDI＋6.3 of sinters and pellets would be declined, RDI-3 is and RDI-o~ be raised, when the content of ZnO was increased, while the degradation index of sinters was more serious than pellets.