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1.前言中国内蒙古白云鄂博铁矿含有铌及稀土元素。包头钢铁公司的生铁与普通生铁比起来含有较多的铌、锰、磷。目前包钢铁水中的Nb、Mn元素没有得到回收,而杂质元素特别是P限制着包钢炼钢生产效率的提高。尽管以前也曾试图回收铌,但由于工艺流程太复杂,所得产品含Nb量低,不能满足作为炼钢铁合金的要求。这是由于分炉间歇操作无法分离渣钢反应生成的氧化物,特别是SiO_2,这样Nb_2O_5就无法富集。为了解决这个问题,有必要采用连续处理的方式,使得炼钢反应不再成为时间的函数而作为位置的函数,从而有利于反应产物的分离。
1. Introduction China’s Inner Mongolia Bayan Obo iron ore contains niobium and rare earth elements. Baotou Iron and Steel pig iron compared with ordinary pig iron contains more niobium, manganese, phosphorus. At present, the Nb and Mn elements in the molten steel are not recovered, while the impurity elements, especially P, limit the improvement of the production efficiency of the Baotou Steelmaking. Despite previous attempts to recover niobium, due to the complexity of the process, the low Nb content of the resulting product does not meet the requirements for steelmaking alloys. This is due to the intermittent operation of the furnace can not separate the slag generated by the reaction of oxides of steel, especially SiO 2, so Nb 2 O 5 can not enrich. In order to solve this problem, it is necessary to adopt a continuous treatment mode, so that the steelmaking reaction no longer becomes a function of time as a function of position, thereby facilitating the separation of reaction products.