(1. 中南大学 冶金科学与工程学院，长沙 410083；2. 白银有色金属公司，白银 730900)
摘 要: 在100 g钴矿加入39 mL浓硫酸、浸出温度80 ℃、浸出时间2 h、液固比2׃1时，采用常规的硫酸浸出，钴浸出率仅为16.86%；当100 g钴矿中加入42.5 mL浓硫酸、在焙烧温度630 ℃、焙烧时间1.5 h的焙烧条件下，采用硫酸化焙烧后硫酸浸出，钴浸出率达到67.48%；在100 g钴矿中加入39 mL浓硫酸和56 mL浓硝酸、浸出温度60 ℃、浸出时间4 h、液固比为3׃1时，采用硝酸氧化下硫酸浸出，钴浸出率为96.35%。
关键字: 高砷钴矿；氧化浸出；硫酸；硝酸
high-arsenic cobalt ores
（1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. Baiyin Nonferrous Metals Company, Baiyin 730900, China）
Abstract:The leaching rate of Co is only 16.86% under condition of 39 mL sulfuric acid in 100 g cobalt ores, reaction time 2 h, reaction temperature 80 ℃, the ratio of liquid to solid 2׃1 when high-arsenic cobalt ores was leached by sulfuric acid solution. The leaching rate of Co reaches 67.48% when 100 g cobalt ores was contacted with 42.5 mL sulfuric acid and roasted at 630 ℃ for 1.5 h, and then the obtained calcine is leached in sulfuric acid solution. In the process of nitric acid oxidation leaching with sulfuric acid, the leaching rate of Co is 96.35% when the nitric acid and sulfuric acid addition volume are 56 mL and 39 mL in 100 g cobalt ores, reaction time is 4 h, reaction temperature is 60 ℃, the ratio of liquid to solid is 3׃1.
Key words: high-arsenic cobalt ores; oxidation leaching; sulfuric acid; nitric acid
