エルー式電氣爐によつて高速度鋼屑より W, Cr 及び V を回収したる實驗報告

概要

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Because of small resources of tungsten, chromium and vanadium, which are the most important elements in high speed steel, it is an urgent problem in Japan to extract these elements from oxidizing slag, hammer scale or grinding wastes in steel works. The auther attempted the extraction of these elements by the following methods in Heroult furnace and obtained a good result : i.e the extraction rates of tungsten, chromium and vanadium were at least 90%, 80% and 20% respectively. 1) Addition of the oxidizing slag to the specially prepared carbide slag. 2) Direct reduction of scales and grinding wastes in coaks powder and ferro-silicon. The auther also calculated the equilibrium condition between oxides of these elements and carbon and proved that the best working temperature range for extraction of the tungsten and chromium from 1600℃ to 1650℃, but extraction of the vanadium wus almost impossible at that temperature range.
社団法人日本鉄鋼協会の論文
1953-06-25