Effects of Temperature on Vacuum Carbothermic Reduction of Panzhihua Ilmenite Concentrate


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The vacuum carbothermic reduction of ilmenite concentrate was analyzed using SEM, EDS, and XRD, in combination with analysis of the Fe metallization rate. Results show that increasing the reduction temperature favors ilmenite reduction. At a reduction temperature of 1400°C, the Fe metallization rate reaches up to 97.15%. Increasing the reduction temperature is conducive to the reduction of Fe and Ti from a high to low state of matter. The microstructure of the reduced sample is divided into gray, graywhite, and white contrasts. The gray-white contrast comprises metallic Fe that contains small amounts of Si. An increase in reduction temperature enhances the generation, gathering, and growth of the graywhite contrast. Fe is the predominant component in the gray contrast, while Ti, O, and Mg are distributed throughout the gray contrast, which is a Ti-rich material phase. Fe is restored to the metallic Fe state. Small amounts of reduced Si and Fe combine to form a ferrosilicon alloy.

Sobre autores

Run Huang

School of Materials and Metallurgy, Guizhou University; Guizhou Province Key Laboratory of Metallurgical Engineering and Energy Process Energy

Email: info@metallurgizdat.com
República Popular da China, Guiyang, 550025; Guiyang, 550025

Pengsheng Liu

School of Materials and Metallurgy, Guizhou University; Guizhou Province Key Laboratory of Metallurgical Engineering and Energy Process Energy

Email: info@metallurgizdat.com
República Popular da China, Guiyang, 550025; Guiyang, 550025

Jinzhu Zhang

School of Materials and Metallurgy, Guizhou University; Guizhou Province Key Laboratory of Metallurgical Engineering and Energy Process Energy

Email: info@metallurgizdat.com
República Popular da China, Guiyang, 550025; Guiyang, 550025

Yaohui Yue

School of Materials and Metallurgy, Guizhou University; Guizhou Province Key Laboratory of Metallurgical Engineering and Energy Process Energy

Email: info@metallurgizdat.com
República Popular da China, Guiyang, 550025; Guiyang, 550025

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