Effect of milling time on carbothermic reduction of ilmenite

球磨时间对钛精矿碳热还原的影响(英文)

A systematic investigation on the effect of milling time on carbothermic reduction of ilmenite was carried out by a combination of thermal analysis, X-ray diffraction（XRD）, scanning electron microscopy（SEM） and particle size analysis. It was shown that the graphite crystalline structure was easily destroyed along the（002） crystal plane during milling process. The particle size of ilmenite/graphite mixture was largely decreased and a fully mixed composite structure was obtained after milling for 4 h at high milling intensity. Milling exerts positive effect on the decreasing temperatures of ilmenite reduction and gradual deoxidizing of titanium oxides was completed.

结合热分析、XRD、SEM和粒度分析系统研究球磨时间对钛精矿碳热还原的影响。结果表明:球磨过程中石墨晶体结构容易沿(002)晶面被破坏。高转速下球磨4 h后钛精矿/石墨混合粉料的粒度大幅度降低,获得了均匀的复合组织结构。球磨有效降低了钛精矿不同阶段的还原反应温度,钛氧化物逐级还原反应完成。