中文摘要：

以风化壳淋积型稀土为原料，对其浸出液进行除杂后，采用碳酸氢铵作为沉淀剂制备晶型混合碳酸稀土。探究W[NH4HCO3]／W[REO]、温度、搅拌时间、陈化时间对形成晶型碳酸稀土的影响，结果表明：W[NH4HCO3]／W[REO]比2．0、温度25—30℃、搅拌时间0．5～2．5h、陈化时间大于12h时制备出易过滤、球状晶体。

英文摘要：

Weathered crust elution -deposited rare earth leaching solution for impurity with ammonia water and ammonium bicarbonate as the precipitation agent preparation crystalline mixed rare earth carbonate. The effects of W[ NH4HCO3 ]/W[ REO] ratio, temperature, stirring time, aging time on forming crystalline mixed rare earth carbonate were studied. The results showed that W[ NH4HCO3]/W[ REO] 2.0, temperature 25 -30℃ stirring time 0.5 -2.5 h, aging time than 12 h Preparation easy filter, Spherical Crystal.