溶出温度对三水铝石与一水软铝石混合型铝土矿溶出及赤泥沉降性能的影响  

Effect of Digestion Temperature on Digestion and Settling Properties of Gibbsite and Boehmite Hybrid Bauxite

作　　者：郑洁 齐利娟 关晓鸽 于晴 郑纯辉 ZHENG Jie;QI Lijuan;GUAN Xiaoge;YU Qing;ZHENG Chunhui(Zhengzhou Non-ferrous Metals Research Institute Co.,Ltd.of CHALCO,Zhengzhou 450041,China)

机构地区：[1]中铝郑州有色金属研究院有限公司,郑州450041

出　　处：《有色金属（冶炼部分）》2023年第12期38-42,95,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：中国铝业股份有限公司科技项目(中铝股份科发字[2022]111号)。

摘　　要：以三水铝石与一水软铝石混合型铝土矿为研究对象,研究了溶出温度对其溶出及沉降性能的影响。溶出试验结果表明:三水铝石在145℃低温条件下较短时间就能全部溶出,且随着溶出时间的延长,氧化铝溶出率呈降低趋势;提高溶出温度到240℃以上,一水软铝石溶出,氧化铝溶出率显著升高,但同时也会造成碱耗增加;沉降试验结果表明:高温溶出矿浆的赤泥沉降性能显著优于低温溶出矿浆,达到相同的沉速,絮凝剂添加量减少约50%。The effect of digestion temperature on digestion and settling properties of gibbsite and boehmite hybrid bauxite were studied applying gibbsite and boehmite hybrid bauxite as objects.The results of digestion tests show that gibbsite can be completely dissolved in a short time at 145℃,and the alumina digestion rate drops with the prolongation of digestion time.When increasing the digestion temperature to 240℃above,the alumina digestion rate of boehmite rises significantly,but alkali consumption increase at the same time.The settling test results show that the settling performance of red mud from high temperature dissolving pulp is significantly better than that from low temperature dissolving pulp.When reaching the same settling rate,the amount of flocculant added is reduced by about 50%.

关 键 词：三水铝石 一水软铝石 温度 溶出 沉降 

分 类 号：TF821[冶金工程—有色金属冶金]