120 t转炉全矿石炼钢工艺开发实践

Developing Practice of 120 t Converter Full Ore Steelmaking Process

为降低钢铁料消耗和生产成本,利用120 t转炉开发了全矿石冶炼工艺。选择杂质含量低的TFe 62%矿石,通过优化矿石布料工艺和供氧制度,解决了全矿石炼钢遇到的布料困难、喷溅和炉衬侵蚀严重等难题。冶炼过程化渣良好,炉渣脱磷率提高了1.17%,钢铁料消耗降低了28.95 kg/t,降低成本6.42元/t。

In order to reduce the steel material consumptions and production costs, the full ore-smelting process was developed in 120 t converter. Choosing the TFe 62% ore with lower impurity content, some problems encountered in the production practice of the full ore-smelting process such as feeding difficulty, splash and lining erosion serious problem were solved by optimizing the ore feeding process and oxygen supply system. The slag melt well in smelting process, the dephosphorization rate was increased by 1.17 percent,steel material consumption was decreased 28.95 kg/t, the production cost was reduced by 6.42 Yuan per ton steel.