钾碱加压溶出铝土矿过程研究  

Study on the process of bauxite dissolution under pressure by potash

作　　者：冉旋 吕国志[1] 顾芷卉 张廷安[1] 张小雷[1] Ran Xuan;Lv Guozhi;Gu Zhihui;Zhang Ting'an;Zhang Xiaolei(Northeastern University,Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education,Shenyang 110819,China)

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室,辽宁沈阳110819

出　　处：《轻金属》2024年第7期1-6,共6页Light Metals

基　　金：国家自然科学基金资助项目(52374353)。

摘　　要：采用钾碱母液对铝土矿进行高压溶出,考察了反应温度、溶出时间、钾碱浓度、配料分子比、石灰添加量对氧化铝溶出效果的影响。结果表明,在反应温度280℃、钾碱浓度240 g/L、配料分子比1.5、反应时间1 h的条件下,赤泥中铝硅比降到了1.06,Al_(2)O_(3)实际溶出率可达64.61%。添加CaO会降低Al_(2)O_(3)溶出率,但赤泥碱含量也同时降低,赤泥中硅的主要存在形式为KAlSiO_(4)。High-pressure dissolution of bauxite was carried out using potash mother liquor to investigate the effects of reaction temperature,dissolution time,potash concentration,ingredient molecular ratio and lime addition on the alumina dissolution effect.The results showed that under the conditions of reaction temperature of 280℃,potash concentration of 240 g/L,ingredient molecular ratio of 1.5,and reaction time of 1 h,the aluminum-silicon ratio in red mud decreased to 1.06,and the actual dissolution rate of Al_(2)O_(3) could reach 64.61%.The addition of CaO will reduce the dissolution rate of Al_(2)O_(3),but the alkali content of red mud is also reduced at the same time,and the main form of silicon in red mud is KAlSiO_(4).

关 键 词：钾碱 铝土矿 加压溶出 Al_(2)O_(3) 

分 类 号：TF806.1[冶金工程—有色金属冶金]