从低品位钼铅矿中提取钼的试验研究

Experimental Study on Extraction of Molybdenum From Low Grade Molybdenum Oxide Ore

研究了从氧化钼矿石中回收钼,考察了NaOH质量浓度、温度、时间、液固体积质量比对钼浸出率的影响。试验结果表明:在NaOH质量浓度80g/L、温度95℃、液固体积质量比3∶1条件下浸出矿石120min,钼浸出率达80%以上;浸出液先以Na2S溶液沉铅,再以HCl溶液调节pH=8除硅,然后再用HCl溶液调节pH=2.5,用D314大孔弱碱性阴离子交换树脂吸附钼,用10%NaOH溶液在40℃下解吸钼,钼吸附率及解吸率分别达到95%和97%。

Recovery of molybdenum from molybdenum oxide ore has been studied. The effects of NaOH concentration, temperature, time, ratio of liquid to solid on molybdenum leaching were examined. At the conditions of NaOH mass concentration of 80 g/L, temperature of 95℃, liquid to solid ratio of 3 ：1,leaching time of 120 min, Mo leaching rate was over 82%. The leaching solution was purified using NazS solution to remove lead and using HC1 solution to adjust pH to 8.0 for removal silicon. Using HC1 solution to adjust pH to 2. 5, D314 macroporous weakly basic anion exchange resin to adsorpt molybdenum, and 10% NaOH solution at 40 ℃ to desorpt molybdenum, molybdenum adsorption and desorption rate reached 95% and 97% ,respectively.