从高钛渣沉钛液中提铝  

EXTRACTING ALUMINIUM FROM THE SOLUTION OF TITANIUM PRECIPITATION OF HIGH TITANIA SLAG

作　　者：隋丽丽[1,2] 翟玉春[1] 

机构地区：[1]东北大学材料冶金学院,沈阳110819 [2]沈阳医学院基础医学院,沈阳110034

出　　处：《矿冶》2015年第3期38-41,共4页Mining And Metallurgy

基　　金：国家自然科学基金资助项目(51204034)

摘　　要：研究了从高钛渣沉钛液中提铝制备氧化铝的工艺条件,包括沉铝、碱浸、碳分、煅烧。通过单因素试验得到最佳工艺条件。沉铝过程:在沉铝温度60℃,沉铝p H值为6,沉铝时间20 min的试验条件下铝的沉出率可达99%;碱浸过程:在碱浸温度70℃,加碱量1∶4,碱浸时间30 min的试验条件下铝的碱浸出率可达到100%;碳分:在常温、常压、通气量40 m L/min条件下进行碳分,当溶液p H值为8时,溶液中铝的碳分率可达到98%;煅烧:将氢氧化铝在1200℃煅烧2 h,可制备出α-Al2O3。Al2O3 was extracted from the solution of titanium precipitation of high titania slag. The process in- cludes aluminum precipitation, alkali-leaching, carbonation and calcination. The optimum operating conditions were obtained by single factor experiments. Aluminium precipitation： the optimum operating conditions were reac- tion temperature 60 ℃ , precipitation pH 6 and reaction time 20 min; the aluminium precipitation rate was about 99% under the optimum conditions. Alkali leaching： the optimum conditions of alkali leaching of aluminium hy- droxide were reaction temperature 70 ℃ , mass ratio of aluminium hydroxide to alkali 1： 4, reaction time 30 min; the leaching rate of aluminium hydroxide was about 100% under the conditions. Carbonation： the optimum operat- ing conditions were CO2 gas flow rate 40 mL/min under normal atmospheric pressure and temperature, the end point for carbonation at pH8 ; the aluminium reaction rate was 98%. Calcination ： aluminum hydroxide was calcined at 1200 ℃ for 2 h to obtain c^-A1203.

关 键 词：高钛渣 沉钛液 氧化铝 

分 类 号：TF803.21[冶金工程—有色金属冶金] TF821