研究了从真空钙热还原炉渣中回收稀土的工艺条件；采用本工艺得到的合格稀土溶液，其回收率达65。
Certified re solution can be obtained by this process and the recovery rate is up to 65.
稀土草酸盐中直接加氢氟酸置换生成氟化稀土，选择加入120%理论量的氢氟酸有较高的转化率和回收率。
The RE fluoride can be prepared directly from oxalate by adding hydrofluoric acid . The ratio of transformation and recovery is high if the hydrofluoric acid is added by 120% theoretical amounts.
且大大提高稀土元素在钢中的均匀性，提高稀土的回收率，消除水口结瘤现象。
The said process avoids the oxidation of alloy elements, and may be used in raising the homogeneity of RE element in steel, raising the recovering rate of RE element and eliminating scaffolding.
且大大提高稀土元素在钢中的均匀性，提高稀土的回收率，消除水口结瘤现象。
The said process avoids the oxidation of alloy elements, and may be used in raising the homogeneity of RE element in steel, raising the recovering rate of RE element and eliminating scaffolding.
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