中文摘要：

针对现行镍钼矿处理工艺存在的钼镍需要分别提取的缺陷,提出镍钼矿加钙氧化焙烧-低温硫酸化焙烧-水浸提取镍钼的新工艺。以贵州遵义镍钼矿为原料,对CaO加入量、氧化焙烧温度、氧化焙烧时间、硫酸加入量、硫酸化焙烧温度、硫酸化焙烧时间以及焙砂水浸工艺参数对镍钼浸出率的影响进行研究。结果表明：在最佳工艺条件下,钼的浸出率为97.33%,镍的浸出率为93.16%,且最佳工艺参数为100 g镍钼矿加入35 g CaO,700℃氧化焙烧2 h,得到的焙砂加入70 mL浓硫酸,再经250℃硫酸化焙烧2 h;硫酸化焙烧得到的焙砂按液固比2：1加水搅拌,经98℃浸出2 h。加入CaO不仅能有效减少镍钼矿氧化焙烧烟气对环境造成的污染,而且能显著提高镍的浸出率。

英文摘要：

In order to leach molybdenum and nickel from Ni-Mo ore,the process of oxidation roasting with CaO,sulphation roasting and water leaching was proposed to extract molybdenum and nickel from the Ni-Mo ore.The process parameters effected the leaching rates of molybdenum and nickel,such as CaO addition,oxidation roasting temperature,and so on were investigated.The experimental results show that 97.33% Mo and 93.16% Ni are extracted from the Ni-Mo ore by oxidation roasting the mixture of 100 g Ni-Mo ore with 35 g CaO at 700 ℃ for 2 h,sulphation roasting the calcine with 70 mL 98% sulphuric acid at 250 ℃ for 2 h,and then water leaching at 98 ℃ for 2 h with the liquid and solid ratio of 2：1.CaO addition can not only protect the environment against SO2 pollution effectively,but also increase nickel leaching rate observably.