高炉炼铁过程脱砷的研究

A Study on Arsenic Removal during Iron-making Process

我国拥有近19亿吨含砷铁矿,但在钢铁生产中大量使用含砷铁矿,往往造成钢材含砷量偏高,影响钢材力学性能。目前国内外主要通过降低含砷铁矿配比,控制烧结、高炉砷负荷的方法使用含砷铁矿,但这无法从根本上解决问题。本文从冶金动力学等方面研究高炉脱砷的可行性,并根据国内某钢厂高炉的原料结构和工艺参数,通过试验室模拟渣铁环境,分别研究了炉渣碱度、铁水温度和铁水硫含量等因素对高炉脱砷的影响,以寻找较好的高炉脱砷条件。

China has nearly 1.9 billion tons of arsenic -bearing iron ore , but the use of arsenic-bearing iron ore in iron and steel production often results in high arsenic content of steel , which affects the mechanical properties of steel. At present , arsenic-bearing iron ore is mainly used by reducing the proportion of arsenic-bearing iron ore and controlling the arsenic load of sintering and blast furnace , but this cannot fundamentally solve the problem. In this paper , the feasibility of arsenic removal from blast furnace is studied from metallurgical kinetics , and the effects of slag basicity , hot metal temperature and sulfur content on arsenic removal from blast furnace are studied by simulating slag -iron environment in laboratory according to the raw material structure and technological parameters of a domestic steel plant , in order to find better solutions for arsenic removal from blast furnace.