粘土钒精矿中温直接浸出试验研究  

Experimental Study on Direct Leaching of Clay Vanadium Concentrate at Middle Temperature

作　　者：冀成庆[1] 沈明伟[1] 朱昌洛[1] 惠博[1] 蔡旺[1] 

机构地区：[1]中国地质科学院矿产综合利用研究所,国土资源部钒钛磁铁矿综合利用重点实验室,中国地质调查局金属矿产资源综合利用技术研究中心,四川成都610041

出　　处：《云南冶金》2014年第3期25-28,56,共5页Yunnan Metallurgy

基　　金：中国地质调查(1212011120316)

摘　　要：研究和讨论了采用氟硅酸中温直接浸出粘土钒精矿的可行性，并对氟硅酸中温直接浸出的影响因素进行了研究，结合工艺矿物学探讨分析了氟硅酸浸钒机理。研究表明：氟硅酸可以很好破坏云母、粘土矿物、褐铁矿的结构，直接浸钒可行，浸出效率大于正常硫酸浸出。粘土钒精矿矿物结构的破坏与氟离子的浓度、温度相关。温度越高，粘土钒精矿分解反应越快。在中温浸出优化条件-200目≥85％，温度85℃，控制L／S为2．5～3：1、氟硅酸溶液（35％W／W）加入比2．0，浸出9h，钒浸出率可达96．58％，同时副产二氧化硅水合物。粘土钒精矿实现氟循环回收利用有望实现。The feasibility on direct leaching of clay vanadium concentrate at middle temperature by fluosilicic acid is discussed and researched, the effect factors of direct leaching at middle temperature by fluosilicic acid are researched too, and the leaching vanadium mechanism of fluesilicic acid is discussed combining with the process mineralogy. The research shows that fluosilicic acid can break well the structure of mica, clay mineral and limonite, so that direct leaching of vanadium is feasible, the leaching efficiency is higher than normal sulfuric acid leaching. Mineral structure break of clay vanadium concentrate is related with the concentration and temperature of fluorine ion. The higher the temperature, the faster decomposition reaction of clay vanadium concentrates. Under the leaching optimization conditions： - 200 mesh ≥85%, temperature 85℃, L/S 2. 5-3 ： 1, fluesilicic acid solution （35%W/W） adding ratio 2. 0, leaching time 9h, vanadium leaching rate can reach to 96. 58%, and the by - product of hydrated silicon dioxide is produced too. It is expected to achieve the fluofine circulation recycling in clay vanadium concentrate treatment.

关 键 词：粘土钒精矿 酸法 直接浸出 氟硅酸 中温 

分 类 号：TF803.21[冶金工程—有色金属冶金]