低品位钛渣水热重结晶提高钛铁矿钛品位的研究

Study on Improving Ti-grade in Ilmenite of Low Grade Titanium Slag with Hydrothermal Recrystallization

用含钛电炉渣在FeSO4-Fe2(SO4)3-H2SO4溶液中水热重结晶,并重选出钛铁矿。研究了FeSO4浓度、Fe2(SO4)3浓度、pH、水热反应温度和保温时间对重选钛铁矿精矿中TiO2含量的影响。结果表明,当FeSO4浓度为0.60mol/L,Fe2(SO4)3浓度0.14mol/L,pH 2,水热反应温度150℃,保温时间3.5h时水热反应效果最佳,此时重选得到得钛精矿中TiO2含量由原渣的41.92%升高到49.74%。

Ti-bearing electroslag was hydrothermal recrystallized in FeSO4-Fe2 （SO4）3-H2 SO4 solution and then separated by gravity separation. Effects of concentration of FeSO4 and Fe2 （SO4）3, pH, temperature of hydrothermal reaction, and holding time on TiO2 content in ilmenite concentrates were investigated. The results show that TiO2 content in ilmenite concentrates rises from 41.92% to 49.74% under the optimum conditions including concentration of FeSO4 of 0.60 mol/L, concentration of Fe2 （SO4）2 of 0.14 mol/L, pH value of 2, temperature of hydrothermal reaction of 150 ℃, and holding time of 3.5 h.