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为了合理选择低碳铝镇静钢的二次精炼工艺,满足现代钢铁厂高效、洁净、低成本以及大规模稳定生产的需求,对LF精炼+钙处理、CAS精炼、LF精炼不钙处理、RH普通处理、RH轻处理等5种不同二次精炼工艺进行了对比分析。结果表明,RH轻处理工艺更适合生产碳含量窄成分控制的低碳铝镇静钢,工序成本最低33.17元/t;RH普通处理工艺钢水纯净度最好,中包钢水平均w(T.O)=16×10~(-6),精炼结束夹杂物总量11.2个/mm~2。应优先采用RH轻处理工艺,其次采用RH普通处理或CAS精炼工艺。LF可不采用钙处理工艺,对于有脱硫任务和连铸水口堵塞严重的钢厂采用LF精炼+钙处理更具有优势。
In order to reasonably choose the secondary refining process of low-carbon aluminum killed steel and meet the requirements of modern steelworks with high efficiency, cleanliness, low cost and large-scale stable production, the LF refining + calcium treatment, CAS refining, LF refining non-calcium treatment, Processing, RH light processing five different secondary refining process were analyzed. The results show that the RH light treatment is more suitable for the production of low carbon aluminum killed steel with a narrow carbon content control, the lowest cost of the process is 33.17 yuan / t; the average purity of RH steel is the best, 16 × 10 ~ (-6). The total amount of inclusions at the end of refining was 11.2 / mm ~ 2. Should be given priority RH light treatment process, followed by RH ordinary processing or CAS refining process. LF does not use calcium treatment process, for the desulfurization task and continuous casting nozzle block serious steel mill using LF refining + calcium treatment more advantages.