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基于某钢厂现场条件,对转炉炼钢过程氧化镍直接合金化冶炼耐候钢的可行性进行了热力学分析,结果表明:铁水中固有的[C]、[Si]、[Mn]、[Fe]等均可作为还原NiO的还原剂元素,在铁水阶段和转炉阶段进行直接合金化是完全可行的。在转炉出钢温度T=1 960 K,w([C])=0.04%条件下,[C]的还原能力比[Fe]强,镍的回收率可达到99.9%。并在实验室进行了相关的动力学实验研究,1 573 K时,在铁水(含碳3%)条件下氧化镍的还原反应速率非常快,15 min后氧化镍还原反应基本完成。
Based on the field conditions in a steel mill, the feasibility of direct alloying of nickel oxide to the weathering steel in the converter steel making process was analyzed. The results show that the intrinsic properties of [C], [Si], [Mn], [Fe] Can be used as reductant element for reducing NiO. It is completely feasible to carry out direct alloying in the molten iron stage and the converter stage. The reduction ability of [C] is stronger than that of [Fe] at the tapping temperature of converter T = 1 960 K, w ([C]) = 0.04% and the nickel recovery rate can reach 99.9%. In the laboratory, kinetic experiments were carried out. At 1 573 K, the reduction rate of nickel oxide was very fast under the condition of hot metal (containing 3% of carbon). After 15 min, the reduction of nickel oxide was basically completed.