65tLF精炼工艺及焊丝钢生产实践

Refining process and practice of welding wire steel in 65 t LF

河北钢铁集团唐钢公司对长材部炼钢区域进行安全改造，根据改造安排及品种钢生产要求，需要拆除一座原有50tLF精炼炉，并新建一座65tLF精炼炉。介绍了LF设备参数和工艺布置，分析了供电加热、精炼渣系及造渣制度、底吹氩控制、喂丝处理等工艺制度，概述了LF精炼炉焊丝钢的生产情况。焊丝钢生产实践表明，LF精炼周期为50-60min，吨钢电耗为55-60kWh，平均升温速度达到5℃／min，出站训（S）=0．010％～0．020％，w（N）≤30×10^-6，钢水质量和洁净度满足要求。

The safe reform of equipment and workshop building for the steelmaking in Long Product Department of Tangshan Iron and Steel Company of Hebei Iron and Steel Group was put into effect in 2013. According to the project scheduling and considering the production plan of branch steel, the 50 t ladle furnace was removed and a 65 t ladle furnace was constructed. The device parameter, process stipulation, the are heat, slag- making, argon blow and wire injection of 65 t LF were briefly introduced in the paper. The welding wire steel productive practice showed that the refining periodic time was 50 -60 min, the power consumption was 55 - 60 kWh/t, the heat speed was 5 ℃/min, sulphur percent was 0. 010 % - 0. 020 %, nitrogen percent was less than or equal to 30 × 10^-6, and the liquid steel quality and purity reached users demand.