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在试验室用MoSi_2井式电阻炉试验研究了12CaO·7Al_2O_O3的预熔工艺和含10%～20%BaO、2%～6%MgO、1%～3%Li_2O,(12CaO·7Al_2O_3)/SiO_2=8～10的12CaO·7Al_2O_3基精炼渣对成分为(%)0.23C、1.29Mn、0.44Si、0.026P、0.023S、0.04Mo、0.02Cr、0.06Cu的低碳钢的脱硫能力。结果表明,12CaO·7Al_2O_3基预熔精炼渣具有较好的脱硫能力,在1 590℃加入量为3%的条件下,能将钢液中的硫含量从0.030%降低到0.006%,脱硫率80.00%。通过运用正交方法对渣成分进行优化,得出12CaO·7A国_2O_3基精炼渣的优化渣系为:15%BaO,4%MgO,3%Li_2O,(12CaO·7Al_2O_3)/SiO_2=9。
In the laboratory, the premelting process of 12CaO · 7Al_2O_O3 and the premelting process with 10% ~ 20% BaO, 2% ~ 6% MgO, 1% ~ 3% Li_2O, (12CaO · 7Al_2O_3) / SiO_2 = 8 ~ 10 12CaO · 7Al_2O_3-based refining slag on the composition of (%) 0.23C, 1.29Mn, 0.44Si, 0.026P, 0.023S, 0.04Mo, 0.02Cr, 0.06Cu low-carbon steel desulfurization capacity. The results show that the 12CaO · 7Al_2O_3-based premelted slag has good desulfurization ability. Under the condition of 1 590 ℃ added amount of 3%, the sulfur content in the molten steel can be reduced from 0.030% to 0.006%, the desulfurization rate is 80.00 %. By using orthogonal method to optimize the slag composition, the optimal slag system of 12CaO · 7A country-base refining slag is 15% BaO, 4% MgO, 3% Li_2O, (12CaO · 7Al_2O_3) / SiO_2 = 9.