二次铝灰低温碱性熔炼研究  

Recovery of aluminium from secondary aluminum dross using low-temperature alkaline smelting

作　　者：郭学益[1] 李菲[1] 田庆华[1,2] 计坤[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083 [2]大冶有色金属股份有限公司博士后科研工作站,湖北黄石435005

出　　处：《中南大学学报（自然科学版）》2012年第3期809-814,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51074190);湖南省自然科学基金资助项目(11JJ4048)

摘　　要：研究利用低温碱性熔炼法提取二次铝灰中铝的过程。探讨碱灰质量比、盐灰质量比、熔炼温度、熔炼时间、不同添加剂和不同混料方式等因素对铝浸出率的影响。研究结果表明:优化条件为:碱灰质量比1.3、盐灰质量比0.7(NaNO3)或0.4(Na2O2)、熔炼温度500℃、熔炼时间60min。湿混料可以提高铝浸出率,以NaNO3为添加剂干混料铝浸出率最高可达87.52%,以NaNO3为添加剂湿混料铝浸出率最高可达92.71%,以Na2O2为添加剂湿混料铝浸出率最高可达92.76%。The process of extracting aluminum from secondary aluminum dross using low-temperature alkaline smelting was studied. The factors, including alkali dross ratio, the addition of different addictive, salt dross ratio, smelting temperature, smelting time, and different mix methods in smelting, were addressed during the transfer of AI into water soluble salt. The results show that the optimum conditions of the process are determined as follows： alkali dross ratio 1.3, salt dross ratio 0.7 （NaNO3） or 0.4 （Na2O2）, smelting temperature 500 ℃, smelting time 60 min. Wet mixture of the sample can improve the leaching efficiency of aluminum. 87.52% of A1 might be leached in water with dry mixing of the sample, while 92.71% of A1 may be leached with wet mixing by using NaNO3 as addictive in smelting process, and 92.76% of A1 can be dissolved with NazO2 as additive.

关 键 词：二次铝灰 低温碱性熔炼 铝 NAOH 资源循环 

分 类 号：TF821[冶金工程—有色金属冶金]