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通过对转炉前期倒渣时机和吹炼工艺参数的研究,开发了一种减少渣量的转炉炼钢工艺。该工艺的转炉吹炼过程分2个阶段,分别是脱磷期和脱碳期,脱磷期结束后倒除部分富磷渣,然后进行小渣量脱碳,吹炼终点保留脱碳渣用以下一炉脱磷。实践结果表明:与常规冶炼工艺相比,减少渣量操作工艺的转炉石灰消耗由26 kg/t降至17 kg/t以下,轻烧白云石消耗由13 kg/t减少到9 kg/t以下,降低了转炉生产成本;吹炼终点钢水w(P)控制在0.008 0%～0.018 2%,平均为0.012 6%。
Through the study on the timing and blow process parameters of the early slag knocking in the converter, a converter steelmaking process was developed to reduce the amount of slag. The process of converter blowing process is divided into two stages, respectively, dephosphorization and decarburization phase, after the end of dephosphorization part of the phosphorus-rich slag was removed, and then decarburization small amount of residue at the end of blowing retained decarburized slag The following furnace dephosphorization. The practice results show that, compared with the conventional smelting process, the converter lime consumption reduced from 26 kg / t to below 17 kg / t and the consumption of light-burned dolomite reduced from 13 kg / t to below 9 kg / t , Reducing the converter production costs; the end of blowing steel w (P) control 0.008 0% ~ 0.018 2%, an average of 0.012 6%.