论文部分内容阅读
石灰石在转炉炼钢前期分解产生大量的CO_2,以吨钢消耗85 kg石灰石计算,每吨钢释放35 kg CO_2。石灰石分解产生的CO_2不仅能够增强转炉铁水的搅拌作用,而且能够与铁水中元素发生反应增强前期供氧。在热力学计算CO_2与铁水相互作用的基础之上,在实验室条件下,向铁水中投入石灰石颗粒,通过分析检测反应过程中铁水中[C]、[Si]、[Mn]成分的变化来验证石灰石分解产生的CO_2和铁水的相互作用。试验结果表明随着石灰石在铁水表面分解进行,铁水中[C]、[Si]、[Mn]含量不断降低,而且在不同的铁水温度条件下,CO_2和铁水中各元素反应的优先性不同。CO_2和铁水反应的利用率随着温度和搅拌强度的升高而升高,总体在25.5%~65.3%变化。
Limestone is decomposed at the early stage of BOF to generate a large amount of CO 2, which is calculated as 85 kg of limestone per ton of steel and 35 kg CO 2 per ton of steel. The CO_2 produced by the decomposition of limestone can not only enhance the stirring effect of the molten iron in the converter, but also react with the elements in the molten iron to enhance the oxygen supply in the early stage. Based on the thermodynamic calculation of the interaction between CO 2 and molten iron, limestone particles were injected into the molten iron under laboratory conditions. The changes of [C], [Si] and [Mn] components in the molten iron during the reaction were analyzed to verify that the limestone Decomposition of CO 2 and molten iron interaction. The experimental results show that the content of [C], [Si], and [Mn] in molten iron continuously decreases with the decomposition of limestone on the surface of molten iron, and the priority of reaction between elements in molten iron and molten iron is different under different molten iron temperatures. The utilization of CO 2 and molten iron increased with the increase of temperature and stirring intensity, and varied from 25.5% to 65.3%.