Pre-reduction of Titanium Concentrate with Pulverized Coal and Iron Power Based on Response Surface Methodology Method

This is an article in the field of metallurgical engineering. The single factor and response surface experiments of heating reduction of titanium concentrate powder adding pulverized coal and iron powder were carried out, respectively so as to study the effects of temperature, heating time and iron powder addition on iron oxide reduction in titanium concentrate. The three regression model of iron metallization rate was constructed, and the influence law of various influencing factors on iron metallization rate was explored. The single factor test shows that the iron metallization rate can be significantly improved above 2.5% in the range of 1.5% ～ 4.0% of the addition amount of iron powder. The response surface method experiment shows that temperature is the most important factor, followed by time and then amount of iron powder, and the interaction between temperature and time is greater than that between heating time and the amount of iron powder added in the degree of influence on the reduction of iron. The iron metallization rate can reach 86.79%, and metallic iron obviously appears in the reduced product at the optimized conditions of 1 450 ℃, 33.5 min and 4% of iron power addition.