(1. 昆明理工大學(xué) 冶金與能源工程學(xué)院，昆明 650093；
2. 昆明理工大學(xué) 省部共建復(fù)雜有色金屬資源清潔利用國(guó)家重點(diǎn)實(shí)驗(yàn)室，昆明 650093；
3. 云南銅業(yè)股份有限公司，昆明 650051)
摘 要: 在堿性溶液中釆用加壓氧化浸出對(duì)高鉍鉛陽(yáng)極泥進(jìn)行脫除砷銻的研究。考察氧化劑用量、氫氧化鈉濃度、液固比、堿浸溫度及反應(yīng)時(shí)間對(duì)鉛陽(yáng)極泥脫砷、銻效果的影響，優(yōu)選得到較佳的工藝條件，砷、銻的浸出率分別達(dá)到95%和80%以上。堿浸液冷卻過(guò)濾結(jié)晶砷酸鈉和銻酸鉛后，采用過(guò)氧化氫進(jìn)行沉銻處理，沉銻后的溶液再補(bǔ)加定量的氫氧化鈉后能夠返回浸出工藝，實(shí)現(xiàn)堿浸液的循環(huán)利用，并保證砷、銻的有效脫除。
關(guān)鍵字: 鉛陽(yáng)極泥；堿性加壓氧化浸出；脫砷；脫銻
（1. Faculty of Metallurgical and Energy Engineering,
Kunming University of Science and Technology, Kunming 650093, China;
2. State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Cleaning Utilization,
Kunming University of Science and Technology, Kunming 650093, China;
3. Yunnan Copper Industry Limited by Share Ltd., Kunming 650051, China）
Abstract:The arsenic and antimony were removed from bismuth-rich lead anode slime by alkaline pressure oxidation leaching. The effects of factors including oxidant dosage, NaOH concentration, ratio of liquid to solid, leaching temperature and leaching time on the arsenic and antimony removal were investigated, and the optimal process conditions were determined by experiments. The results show that the leaching rate of arsenic and antimony can reach over 95% and 80%, respectively. The removal of antimony can be realized by adding hydrogen peroxide after the removal of crystal sodium arsenate and lead antimonate by cooling and filtration. The alkaline leaching solution is returned to the leaching process after adding quantitative sodium hydroxide, which achieves the recycling of alkaline solution and the effective separation of arsenic and antimony from other metals.
Key words: bismuth-rich lead anode slime; alkaline pressure oxidation leaching; arsenic removal; antimony removal
