（1. Key Laboratory for Ecological Metallurgy of Multimetallic Ores, Ministry of Education，Northeastern University， Shenyang 110819， Liaoning， China 2. School of Metallurgy， Northeastern University， Shenyang 110819， Liaoning， China）
Abstract：In order to realize the comprehensive utilization of red mud resources with high added value, the high temperature simulation experiment was carried out to study the reduction roasting and melting process of red mud pellets containing carbon. Carbon- bearing pellets of red mud were reduced and roasted at 1 200 ℃. Combined with the phase diagram analysis, a certain proportion of CaO and Al2O3 were added to the pulverized roasting pellets for the tempering and melting- separation. The results showed that the metallization rate of metalized pellets were more than 91.3% after the reduction of 12 min at 1 200 ℃, the reduction effect was good. After adding the appropriate amount of CaO and Al2O3, the pellets were melted at 1 450 ℃, which can achieve the effective separation of slag and iron. The metal iron yield can reach more than 90%, and the quality of the molten iron met the requirements of steelmaking. The w(TFe) in molten slag can be less than 0.5%. The main phase of the slag was 12CaO·7Al2O3, CaTiO3 and 2CaO·Al2O3·SiO2. According to the test results of melting point, the melting performance satisfied the desulfurization conditions of molten steel.
2017, Vol. 27 
