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中文摘要：
采用复合铵盐作浸出剂浸出风化壳淋积型稀土矿中的稀土。考察浸出剂的配比、浓度、液固比、流速、pH等因素对稀土浸出率的影响。结果表明，NHtCl、NHtNO2、（NH。）2SO4质量比为4：5：6的复合铵盐浸出剂为最佳组合；液固比越大、流速越慢，浸出率越高；当浸出剂浓度为10g／L、pH-3．5时浸出效果最好。
英文摘要：
Rare earth （RE） was leached from weathered crust elution-deposited rare earth ore with composite ammonium salts as leaching agent. The effects of ratio of composite ammonium salts and concentration of leaching agent, ratio of liquid to solid （L/S）, flow rate and pH value on leaching rate of RE were investigated. The results show that the best mass ratio of leaching agent of NH4C1, NH4NO3, （NH4）2SO4 is 4 ： 5 ： 6. The bigger L/S and lower flow velocity is, the higher leaching rate is. The best leaching effect is achieved when concentration of leaching agent is 10 g/L and pH value is 3.5.
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