(1. 中南大學 冶金科學與工程學院，長沙 410083；2. 白銀有色金屬公司，白銀 730900)
摘 要: 在100 g鈷礦加入39 mL濃硫酸、浸出溫度80 ℃、浸出時間2 h、液固比2׃1時，采用常規(guī)的硫酸浸出，鈷浸出率僅為16.86%；當100 g鈷礦中加入42.5 mL濃硫酸、在焙燒溫度630 ℃、焙燒時間1.5 h的焙燒條件下，采用硫酸化焙燒后硫酸浸出，鈷浸出率達到67.48%；在100 g鈷礦中加入39 mL濃硫酸和56 mL濃硝酸、浸出溫度60 ℃、浸出時間4 h、液固比為3׃1時，采用硝酸氧化下硫酸浸出，鈷浸出率為96.35%。
關鍵字: 高砷鈷礦；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
