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为了研究脱碳渣在脱磷期的重新利用,基于多功能转炉炼钢法进行连续循环冶炼实验.实验发现:脱磷阶段渣中较低的Fe O含量、吹炼5 min左右,[C]≥2.8%的条件下,可实现转炉熔池内铁液[P]≤0.025%的脱磷效果,并对低(Fe O)含量炉渣的脱磷可行性进行热力学计算;随着循环的进行,石灰加入量逐渐降低,由65 kg·t-1降低至31 kg·t-1,转炉冶炼终点钢水[P]量由0.018%降低至0.005%,2~4炉后达到平衡状态;在循环过程中,脱磷阶段结束倒出炉渣60~80 kg·t-1,整个循环结束一次性倒出剩余全部炉渣120~130 kg·t-1,平均渣量为83 kg·t-1左右,较普通工艺的120 kg·t-1渣量有大幅度减少.
In order to study the reuse of decarburized slag during dephosphorization, a continuous cycle smelting experiment was carried out based on the multi-functional converter steelmaking method. It was found that the lower FeO content in dephosphorization slag was about 5 min, ≥2.8%, the dephosphorization effect of molten iron [P] ≤0.025% in the converter pool can be achieved and the feasibility of dephosphorization of low (Fe 0) content slag can be calculated thermodynamically. As the cycle proceeds, lime The amount of molten steel decreased from 65 kg · t-1 to 31 kg · t-1, and the amount of [P] at the end of the converter decreased from 0.018% to 0.005%. After 2 to 4 hours, the equilibrium state was reached. During the cycle , The dephosphorization stage dumping slag 60 ~ 80 kg · t-1, the entire cycle at the end of a one-time pouring all the remaining slag 120 ~ 130 kg · t-1, the average amount of slag is about 83 kg · t-1, more ordinary The amount of 120 kg · t-1 slag in the process has been greatly reduced.