The purity 99.99% of scandium oxide (sc 2o 3) was prepared from tungstenic slag with extraction process.
用萃取法从钨矿渣制得纯度为99.99%的氧化钪。
It is very significant extracting niobium, tantalum from tungstenic slag. The extraction method and the computational formula of it are given out in this paper.
从钨矿渣中提取铌、钽具有重要的意义。本文给出了提取方法及相应的计算公式。
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