降低RH和LF工序生产成本探析

Reducing production cost in RH and LF processes

分析研究RH冶炼周期的极限性环节和LF吨钢电耗及电极消耗高的影响因素,通过钢包全程加盖,优化脱碳工艺,改变硅钢加料方式,优化通电档位、提高新钢包烘烤效果、优化渣料加入量等各类攻关,RH平均冶炼周期从34 min降低到28.3 min,具备月产15万t能力;LF电极消耗从0.37 kg/t降至0.29 kg/t,电耗降低5.36 kWh/t,直接经济效益1 966.93万元,取得较好经济效益.

In this paper, the limited links of RH smelting cycle and the factors in high electricity and electrode consumption of LF per ton steel were investigated. The average smelting period of RH reduced from 34 minutes to 28.3 minutes, with a capacity of 15000 tons per month, through ladle covering in all processes, changes of feeding mode of silicon steel, improvement in the heating effect of the new ladle, optimization of deearburization process, electric gear position and amount of slag addition. The electrode consumption of LF furnace reduced from 0.37 kg/t to 0.29 kg/t, and electricity consumption reduced by 5.36 kwh/t per ton steel. As a result, favorable economic benefits were achieved with the direct economic benefit of 19.6693 million yuan.