转炉炼钢过程氧化镍直接合金化的研究

Study on Direct Alloying of Nickel Oxide in Converter Steelmaking Process

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。

On the basis of the condition of one local steelmaking plant, thermodynamics analysis for the possibility of making weathering steels by direct alloying with nickel oxide in the converter was conducted. The results showed that[C]、[Si]、[Mn]and[Fe] can reduce NiO and making weathering steels by direct alloying with nickel oxide both in the hot metal and the converter are possible. At the end point of converter （T=1960 K, w（[C]） =0.04%）, the reducing ability of [C] is stronger than [Fe] and the yield of nickel is more than 99.9 % . And the relative kinetics experiment was carried out. The results of kinetics experiment showed that, under the condition of hot metal （w（[C]） = 3 %, T= 1 573 K） the rate of reducing nickel oxide is very fast, which can be basically completed in 15 min.