(中南大學(xué) 冶金科學(xué)與工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 以國(guó)外某紅土鎳礦經(jīng)氯化離析法預(yù)處理后的還原礦為原料，對(duì)銹蝕法處理預(yù)還原紅土鎳礦工藝進(jìn)行研究，系統(tǒng)考察酸料質(zhì)量比、空氣流量、銹蝕溫度、銹蝕時(shí)間、攪拌速率以及固液比(固體質(zhì)量與液體體積比，mg/mL)對(duì)鐵、鎳和鈷浸出率的影響。結(jié)果表明：在酸料質(zhì)量比0.10，空氣流量1 L/min、銹蝕溫度80 ℃、銹蝕時(shí)間8 h、攪拌速率300 r/min和固液比1:10的條件下，鎳和鈷的浸出率分別達(dá)到90.9%和80.2%，鐵的浸出率僅為9.9%，實(shí)現(xiàn)了鐵與鎳和鈷的分離。
關(guān)鍵字: 紅土鎳礦；鎳；鈷；銹蝕法；浸出率
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:The treatment of reductive laterite by corrosion process was studied using the laterite processed by chloridizing segregation process as starting materials. The effects of mass ratio of acid to ore, air flux, leaching temperature, leaching time, stirring speed, and solid-to-liquid ratio (ratio of solid mass to liguid volume, g/mL) on the leaching rates of Fe, Ni and Co were systematically investigated. The results show that under the optimum conditions of mass ratio of acid to ore 0.1:1, air flux 1 L/min, leaching temperature 80 ℃ and time 8 h, stirring speed 300 r/min, solid-to-liquid ratio 1:10, the leaching rates of Ni and Co are respectively 90.9% and 80.2%, and the leaching rate of Fe is only 9.9%. Consequently, Ni and Co can be effectively separated from Fe.
Key words: laterite; nickel; cobalt; corrosion process; leaching rate
