(昆明理工大學 冶金與能源工程學院，昆明 650093)
摘 要: 研究從高鐵閃鋅礦溶液中沉淀赤鐵礦的過程。考察溫度、晶種用量、時間、氧分壓對除鐵及雜質(zhì)元素行為的影響。結(jié)果表明：除鐵率和渣中鐵含量隨溫度、時間、晶種用量的增加而升高，與氧分壓關(guān)系不大。升高溫度和延長反應(yīng)時間可以提高赤鐵礦的純度。在反應(yīng)溫度190 ℃、晶種用量20 g/L、反應(yīng)時間3 h 和氧分壓0.3 MPa的條件下除鐵率達到95%以上，除鐵后溶液Fe 含量低于2.5 g/L，赤鐵礦渣的Fe 含量高于50%。K 和Ca 的入渣率高于95%，Na、F 和Ni 的入渣率為50%~60%，Zn、Mg、Mn 和Cl 的入渣率低于1%。
關(guān)鍵字: 高鐵閃鋅礦；赤鐵礦；除鐵；濕法煉鋅
（Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China）
Abstract:The precipitation process of hematite from the leaching liquor of high iron sphalerite was studied. The effects of temperature,seed addition,time and oxygen partial pressure on the iron precipitation and the behavior of impurities during the process were investigated. The results show that the iron removal rate and iron content of the residue increase with the increase of temperature,time and seed addition,and are independent of oxygen partial pressure. Increasing temperature and prolonging time can improve the purity of hematite. The iron removal rate is larger than 95% at temperature of 190 ℃,seed addition of 20 g/L,time of 3 h and oxygen partial pressure of 0.3 MPa. Iron content of precipitate is larger than 50% and purified solution contains Fe below 2.5 g/L. More than 95% of K and Ca and 50%-60% of Na,F and Ni co-precipitate with hematite,less than 1% of Zn,Mg,Mn and Cl remain in the residue.
Key words: high iron sphalerite; hematite; iron removal; zinc hydrometallurgy
