从铝土矿渣(红泥)中回收稀土Recovery of Rare Earths from Bauxite Residue (Red Mud)使用格哈特Labshake振荡器160rpm条件下振荡样品The room temperature leaching was carried out in sealed polyethylene bottles by constant agitation using a laboratory shaker (Gerhardt Laboshake) at 160 rpm