Effects of mechanical activation and oxidation-reduction on hydrochloric acid leaching of Panxi ilmenite concentration  

机械活化和氧化-还原处理对攀西钛铁矿精矿盐酸浸出的影响(英文)

作　　者：谭平[1] 胡慧萍[2] 张黎[2] 

机构地区：[1]湖南机电职业技术学院生物化工系,长沙410151 [2]中南大学化学化工学院,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2011年第6期1414-1421,共8页中国有色金属学报（英文版）

基　　金：Project(2009FJ3082)supported by Research Project of Science and Technology in Hunan Province,China;Project(2007CB613606)supported by the National Basic Research Program of China

摘　　要：The effects of oxidation-reduction treatment and mechanical activation on the hydrochloric acid leaching performance of Panxi ilmenite concentration were investigated.The results show that both of oxidation-reduction treatment and mechanical activation significantly accelerate the extraction of Fe,Ca and Mg from Panxi ilmenite concentration;however,the CaO and MgO contents of the calcined residues obtained from oxidized-reduced ilmenite concentration are higher than the standard values required by chlorination process.The Ca and Mg in oxidized-reduced ilmenite concentration can be leached much faster after mechanical activation,yielding a synthetic rutile which meets the requirements of chlorination process containing 90.50% TiO2 and 1.37% total iron as well as combined CaO and MgO of 1.00%.The optimum oxidation and reduction conditions are as follows：oxidization at 900 ℃ in the presence of oxygen for 15 min and reduction at 750 ℃ by hydrogen for 30 min.研究机械活化和氧化-还原处理对攀西钛铁矿精矿盐酸浸出过程的影响。结果表明:机械活化和氧化-还原处理均可明显提高钛铁矿精矿中铁、钙和镁的浸出;氧化-还原处理的钛铁矿经盐酸浸出后得到的人造金红石,其钙镁含量过高,不能满足沸腾氯化法的要求;经机械活化处理的氧化-还原钛铁矿,能进一步降低盐酸浸出渣的钙镁含量,所得到的人造金红石含TiO290.50%、全铁1.37%、钙镁总量1.00%,完全满足沸腾氯化法的生产要求。最佳的氧化还原处理条件为:在900℃氧气气氛中氧化15min,在750℃氢气气氛中还原30min。

关 键 词：ilmenite concentration mechanical activation OXIDATION REDUCTION hydrochloric acid leaching 

分 类 号：TD951[矿业工程—选矿]