钼镍矿提钼强化浸出试验研究

Experimental Research on Intensification of Leaching Process for Extracting Molybdenum from a Mo-Ni Ore

针对钼镍矿氧化焙烧过程中生成的MoO3、MoO2、Mo、Mo2S3等低价钼化合物很难被碱浸出的缺点，提出了一种“焙烧脱硫一次氯酸钠强化浸出”的技术方案，并通过对比试验确定了最佳工艺条件t氢氧化钠30％，次氯酸钠20％，浸出液固比3：1，温度90～95℃，反应时间3h。试验结果表明，在最佳工艺条件下，钼的浸出率可达98％以上，浸出效果明显优于传统的提取方法。

Aimed at the disadvantage of some low- valency molybdenum compounds（ MoO3 ,MoO2, Mo,Mo2O3 and so on） ,that are produced during the course of oxidizing roasting of the molybdenum - nickel ore, are difficult - to leach,a new technological scheme of＂ desulphurizing roasting - hypochlorite intensifying leaching＂ is proposed in this paper. Based on the detailed contrast tests, the optimal technological conditions were established as follows：sodium hydroxide（NaOH） 30%, sodium hypochlorite（NaOCl） 20%, the ratio of liquid to solid 3： 1, leaching temperature 90 -95 ℃, leaching time 3h. Test results showed that the leaching rate of molybdenum can reach over 98 % under optimal technological conditions, the leaching efficiency is obviously superior to some conventional treatment technologies. It provided a new way for exploitation and utilization of this kind of mineral resources.