Large-Scale Consumption and Zero-Waste Recycling Method of Red Mud in Steel Making Process
AbstractTo release the environmental pressure from the massive discharge of bauxite residue (red mud), a novel recycling method of red mud in steel making process was investigated through high-temperature experiments and thermodynamic analysis. The results showed that after the reduction roasting of the carbon-bearing red mud pellets at 1100–1200 °C for 12–20 min, the metallic pellets were obtained with the metallization ratio of ≥88%. Then, the separation of slag and iron achieved from the metallic pellets at 1550 °C, after composition adjustment targeting the primary crystal region of the 12CaO·7Al2O3 phase. After iron removal and composition adjustment, the smelting-separation slag had good smelting performance and desulfurization capability, which meets the demand of sulfurization flux in steel making process. The pig iron quality meets the requirements of the high-quality raw material for steel making. In virtue of the huge scale and output of steel industry, the large-scale consumption and zero-waste recycling method of red mud was proposed, which comprised of the carbon-bearing red mud pellets roasting in the rotary hearth furnace and smelting separation in the electric arc furnace after composition adjustment. View Full-Text
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Ning, G.; Zhang, B.; Liu, C.; Li, S.; Ye, Y.; Jiang, M. Large-Scale Consumption and Zero-Waste Recycling Method of Red Mud in Steel Making Process. Minerals 2018, 8, 102.
Ning G, Zhang B, Liu C, Li S, Ye Y, Jiang M. Large-Scale Consumption and Zero-Waste Recycling Method of Red Mud in Steel Making Process. Minerals. 2018; 8(3):102.Chicago/Turabian Style
Ning, Guoshan; Zhang, Bo; Liu, Chengjun; Li, Shuai; Ye, Yun; Jiang, Maofa. 2018. "Large-Scale Consumption and Zero-Waste Recycling Method of Red Mud in Steel Making Process." Minerals 8, no. 3: 102.
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