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为了研究唐山建龙60 t转炉中高碳钢脱磷的氧化性控制原则,对转炉冶炼终点C-O、Fe-O平衡进行了分析和计算,并对钢液中溶解氧平衡的磷含量和渣中(Fe O)平衡的磷含量进行了计算。结果表明:转炉冶炼终点渣氧化性决定钢液中的磷含量,当终点钢液溶解氧在0.03%到0.045%之间时,[P]-[O]平衡磷含量是(Fe O)-[P]平衡磷含量的21~38倍;终渣(Fe O)含量大于13%,可实现终点磷含量小于0.015%。对于终点碳含量大于0.1%的钢种进行工业实验,通过加料和枪位调整提高终渣氧化性,终点平均磷含量为0.013%,脱磷率提高8%。
In order to study the oxidation control principle of high-carbon steel dephosphorization in the 60t converter of Tangshan Jianlong, the balance of CO and Fe-O at the end of converter smelting was analyzed and calculated. The phosphorus content of dissolved oxygen balance in slag and slag Fe O) was calculated. The results show that the phosphorus content in the molten steel is determined by the oxidation of the slag at the end of the converter smelting. When the dissolved oxygen of the molten steel is between 0.03% and 0.045%, the equilibrium phosphorus content of [P] - [O] is (Fe 0) - [ P] balance of phosphorus content of 21 to 38 times; final residue (Fe O) content greater than 13%, can achieve the end point of phosphorus content of less than 0.015%. An industrial experiment was conducted on steels with an end point carbon content of more than 0.1%. The final oxidation was improved by feeding and gun position adjustment. The average phosphorus content at the end point was 0.013% and the dephosphorization rate increased by 8%.