摘要
通过碱溶法从二次铝灰中提取氧化铝,探讨了固液比、碱液浓度、反应温度和反应时间等因素对氧化铝溶出率的影响。结果显示,在固液质量体积比为0.08 g/mL、碱液质量浓度为248 g/L、反应温度为250℃、反应时间为3 h和反应搅拌转速为400 r/min的实验条件下,氧化铝溶出率为98.6%;通过对二次铝灰中氧化铝溶出率、溶液苛性比和标准氧化铝-氧化钠-水系平衡图等指标进行分析,表明二次铝灰具有良好的碱溶性能。
Alumina was extracted from secondary aluminum dross by alkali leaching method.The effects of solid-liquid ratio,concentration of alkali solution,reaction temperature and reaction time on the leaching rate of alumina were discussed.The results showed that the leaching rate of alumina was 98.6%under the conditions:the solid-liquid ratio was 0.08 g/mL,the alkali mass concentration was 248 g/L,the reaction temperature was 250℃,the reaction time was 3 h and the stirring speed was 400 r/min.Through the analysis of secondary aluminum dross dissolution rate,the sodium oxide to alumina ratio and the equilibrium diagram of Al2O3-Na2O-H2O system,the results showed that the secondary aluminum dross had good alkali leaching performance.
作者
李玲玲
宋明
靳强
Li Lingling;Song Ming;Jin Qiang(College of Environment and Safety Engineering,Qingdao University of Science and Technology,Qingdao 266042,China;School of Environmental Science and Engineering,Shanghai Jiao Tong University)
出处
《无机盐工业》
CAS
CSCD
北大核心
2019年第1期53-57,共5页
Inorganic Chemicals Industry
基金
国家自然科学基金(21476139)
国家水体污染控制与治理科技重大专项(2014ZX07204-008)
关键词
碱溶
二次铝灰
氧化铝
alkaline solution leaching
secondary aluminum dross
alumina
