tungstenic

The purity 99.99% of scandium oxide(Sc 2O 3) was prepared from tungstenic slag with extraction process.

用萃取法从矿渣制得纯度为99．99％的氧化钪。

In order to recover the tungstenic dust, sodium carbonate was added to it and smelting test was carried out in a 0. 1MVA electric arc furnace.

要为回收尘，利用尘灰与碳酸钠在0．1MVA电内进行了回收试验，制成粗酸钠。