预氧化处理对云南钛精矿浸出过程粉化的影响  

Effect of Pre-oxidation on Pulverization of Yunnan Titanium Concentrate during Hydrochloric Acid Leaching

作　　者：林凡[1] 杨剑[1] 陈奎[1] 赵冬[1] 刘松利[2] 刘国庆[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]攀枝花学院资源与环境工程学院,四川攀枝花617000

出　　处：《钢铁钒钛》2016年第1期7-11,共5页Iron Steel Vanadium Titanium

摘　　要：人造金红石作为天然金红石的优质代用品,大量用于生产氯化法钛白和海绵钛。针对云南钛精矿相关物化特性,采用预氧化钛精矿、盐酸浸取的方法制备人造金红石,研究预氧化处理对浸出率及粉化的影响。结果表明:预氧化处理改变了钛精矿结构,解决了盐酸浸出过程的粉化问题。在盐酸浓度为20%、酸矿比为5∶1时,加热到沸腾浸出在750℃时预氧化30 min后的钛精矿,得到的人造金红石粒度小于74μm的矿粒仅占3.29%,品位为77.1%。Synthetic rutile as a good substitute for natural rutile is greatly used for production of titanium dioxide by chlorination process and sponge titanium. According to the physical and chemical properties of Yunnan titanium concentrate,pre-oxidation and hydrochloric acid leaching method was used to prepare synthetic rutile for researching the effect of pre-oxidation treatment on the leaching rate and pulverization.The results show that the structure of titanium concentrate is changed and the pulverization during hydrochloric acid leaching process is resolved by pre-oxidation. With 20% hydrochloric acid and 5∶ 1 of acid /ore ratio,heating to boiling for leaching the titanium concentrate oxidized at 750 ℃ for 30 min can obtain synthetic rutile with only 3. 29% of particles less than74 μm and 77. 1% of grade.

关 键 词：人造金红石 云南钛精矿 预氧化处理 盐酸浸出 粉化 

分 类 号：TF823[冶金工程—有色金属冶金] TF046