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发明公开
CN103146872A 预熔合成渣及利用其的转炉出钢反向渣洗方法 有权 转让

预熔合成渣及利用其的转炉出钢反向渣洗方法
摘要：
本发明公开了一种预熔合成渣和一种利用预熔合成渣对转炉出钢的钢水进行反向渣洗的方法。预熔合成渣按质量百分比计包括下述成分：5％～10％的Al，16％～20％的Al2O3，28％～32％的CaO，11％～15％的MgO，8％～12％的CaF2，3％～7％的SiO2，其余为不可避免的杂质。根据本发明的利用预熔合成渣对转炉出钢的钢水进行反向渣洗的方法，采用铝铁进行脱氧，出钢前把全部的铝铁和一半预熔合成渣平铺加入钢包包底，出钢0～1/4过程中通过溜槽随钢流均匀加入剩余预熔合成渣，从而预熔合成渣在上浮过程中捕捉Al2O3夹杂以对钢水进行渣洗。
摘要（英）：

The invention discloses pre-molten synthetic slag and a method for carrying out reverse wash-heat on molten steel from converter tapping by using the pre-molten synthetic slag. The pre-molten synthetic slag comprises the following components in percentage by mass: 5-10% of Al, 16-20% of Al2O3, 28-32% of CaO, 11-15% of MgO, 8-12% of CaF2 and 3-7% of SiO2, and the remnants are inevitable impurities. According to the method for carrying out reverse wash-heat on the molten steel from converter tapping by using the pre-molten synthetic slag, ferro-aluminum is adopted for deoxygenation, the whole ferro-aluminum and a half of the pre-molten synthetic slag are flatly paved and fed to the bottom of steel ladles before tapping, the rest pre-molten synthetic slag is uniformly added through a chute along with the steel flow in the 0-1/4 process of tapping, then the pre-molten synthetic slag captures the Al2O3 impurity in the floating process so as to wash and heat the molten steel.

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