铁铝共生矿绿色化综合利用

Clean and integrated utilization of iron-aluminum paragenetic mineral

采用硫酸铵焙烧铁铝共生矿,共生矿中的铝和铁与硫酸铵反应生成可溶的硫酸盐,加水溶出后与二氧化硅分离,过滤得到硫酸盐溶液和硅渣。硅渣采用氢氧化钠浸出制取硅酸钠溶液和尾渣,硅酸钠溶液经苛化和碳分分别制取硅酸钙和白炭黑。采用黄铵铁矾法沉铁,生成的黄铵铁矾经水解制取氧化铁。硫酸铝溶液沉铝得到硫酸铵溶液和粗氢氧化铝,粗氢氧化铝经碱溶和种分制取氢氧化铝。整个过程综合提取利用铁铝共生矿中的有价组元,硫酸铵、氢氧化钠和水循环利用。

The iron-aluminum paragenetic mineral is calcined with ammonium sulfate.The aluminum and iron in the mineral react with ammonium sul fate to form soluble sulfate,and separated from SiO2 by water leaching.The sulfate solution and silicon residue are obtained by filtration.The silicon residue is leached with sodium hydroxide to prepare sodium silicate solution and tailing,and the sodium silicate solution is causticized and carbonated forming calcium silicate and silica white respectively.Ammonium jarosite is obtained to obtain iron,and ammonium jarosite is hydrolyzed to produce Fe2O3-The ammonium sulfate solution and crude aluminum hydroxide are obtained from aluminum sulfate solution,and the crude aluminum hydroxide is leached and seed precipitated.Throughout the whole process,the valuable components in the ore arutilized,and ammonium sulfate,sodium hydroxide and water are recycled.