Evaluation of Reduction Progress of Raw Titanomagnetite and Char Composite by Thermogravimetry

摘要

Because of the scarcity of high grade hematite ores, it is necessary to use magnetite ores in the blast furnace iron- making or DR processes.!) The gas-based DR processes, such as, MIDREX or HYL III is becoming more compara- tive due to low price of shale gas. Nevertheless, coal-based DRI processes, such as, rotary kiln or rotary hearth furnace are still receiving great attention for producing flat product of steel in terms of a virgin iron.” Extensive understanding of DRI production technology using low grade ores is limited in alternative ironmaking processes. Great concerns have been taken about the reduction of titanomagnetite (TTM) ore, so-called iron sand since it is not easily reducible.