初级富钛料矿相重构法制取人造金红石.docVIP

 n 初级富钛料矿相重构法制取人造金红石 姜涛1，董海刚1,2，郭宇峰1，刘水石1，邱冠周1* （1. 中南大学资源加工与生物工程学院，长沙 410083； 5 10 15 20 25 30 35 40 2. 贵研铂业股份有限公司，稀贵金属综合利用新技术国家重点实验室，昆明 650106） 摘要：开展了初级富钛料通过添加 Na2CO3 焙烧进行矿相重构制取人造金红石的研究，结果 表明，在 Na2CO3 与初级富钛料重量比 3:7、焙烧温度 900、焙烧时间 2h 条件下所得焙烧 产物经酸浸、煅烧后，获得 TiO2 品位为 92.23%、回收率 92%左右、CaO+MgO 含量为 0.78% 的人造金红石。采用 XRD，SEM 等技术对焙烧产物和浸出产物微观结构物及相组成进行表 征发现，该过程的机理主要在于初级富钛料添加 Na2CO3 焙烧可使其中的主要杂质转变为易 选择性溶出的铁酸钠、Na-Fe-Ti-O 系和 Na-Mg-Ti-O 系新矿相，通过酸浸，焙烧产物中大部 分杂质被选择性溶出，钛组分转变成金红石型和锐钛型 TiO2，实现了高品位人造金红石的 制备。 关键词：钢铁冶金；富钛料；矿相重构；酸浸；人造金红石 中图分类号：TF 111. 3 Production of synthetic rutile from primary titanium-rich materials by mineralogical reconstruction Jiang Tao1, Dong Haigang1,2, Guo Yufeng1, Liu Shuishi1, Qiu Guanzhou1 (1. School of Mineral Processing and Bioengineering,Central South University, Chang Sha, 410083, China; 2. Sino-platinum Metals CO., Ltd, State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kuming, Yunnan 650106) Abstract: A sodium carbonate roasting process was studied for production of synthetic rutile from primary titanium-rich material with mineralogical reconstruction. The production of synthetic rutile and mechanism from primary titanium slag by mineralogical reconstruction was studied. The changes in micromorphology and phase composition were discussed by SEM, EDS and XRD. The process mechanism of producing synthetic rutile was analyzed. The results showed that an easily decomposed roasted product was produced by sodium carbonate roasting under the desired conditions. The optimized roasting conditions used a Na2CO3 to slag weight ratio of 3:7 at 900℃ for 2 h. The roasted product was mainly comprised of sodium titanate, sodium ferrite, Na-Fe-Ti-O and Na-Mg-Ti-O system substances. The impurities associated with the roasted product were leached by water and dilute sulfuric acid solution and titanium component turned into TiO2, by calcination, a synthetic rutile with 92.23% TiO2 grade and about 92% recovery and 0.78% CaO+MgO