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。
So far, XTC not only has relatively integrated supply chain in Tungstenic products, but also involved real estate and new energy sources industries. It has 12 branch companies or holding companies.
目前XTC拥有完整的主产业钨产品的产业链，还有房地产、新能源二块产业，已形成一个有十二个分公司或控股公司的集团企业。
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