Experimental Study on Hydrogen Selective-Reduction of Niobium Containing Iron Ore Powder

Abstract

An experimental study on hydrogen selective-reduction of niobium containing iron ore powder is discussed in this paper. It was used for this study that a homemade diffusion bed tubular resistance furnace which gas was blown from the bottom. Experimental results are reported on that when reduction times reach 2h the best reduction temperature is 950°C and that the reduction degree which is niobium containing iron ore powder can reach 90.98% and the metallization rate which is niobium containing iron ore powder can reach 86.47%. And in the best reduction condition adding LiCL catalyst, it is found that adding LiCl catalyst can promote the reduction degree and the metallization rate improved significantly. Adding LiCL catalyst's proportion is changed from 0.43% to 2.14%, the experiment results show that when adding 0.71% LiCl catalyst the catalytic effect is better and the reduction degree can reach 95.82% and the metallization rate can reach 93.73%.