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タイトルヨミ
チョウコウゴウキン ヨリ タングステン オヨビ タンタル ノ カイシュウ
日本語以外のタイトル
On the Recovery of Tangsten and Tantalum in Ultra Hard
ファイル
言語
日本語
著者
山本 作次郎
内容記述(抄録等)
In the process of the manufacture of Ultra Hard.Steel with the Powder Metallurgy Method,it is unavoidable to produuce the reluctant and abundant scraps,from which the expensive metals are not easily recovered. The author recovered tungsten and tantalum as oxides at the average rate of 97% (tungsten oxide)and 9O% (tantalum oxide)from the scrap pieces which consisted of tungesten carbide(8%),titanium carbide(6%),tantalum carbide(4%)and cobalt(l0%). The most important chemical treatments are to be experienced.in the next processes,the pieces are heated 800℃ for l.5−2 hours in the air,then they become powders of oxides not to be attainable with physical methods. Potassium hydroxide,five times as much,is added to the weighed sample,then fused−at 800℃ for about one time,and allowed to cool in the air. Next tme,potassium carbonate, five times as much,is added to the cooled one, and then fused atll00℃ thorougly.On this o㏄asion,the iron crucible is less corroded.For the chemical separation of tungsten and tantalum,the greatest nervous attention is necessary so as not to fail to catch either of them completely.
掲載誌名
島根大学文理学部紀要. 理学科編
3
開始ページ
30
終了ページ
37
ISSN
03709434
発行日
1970-03-20
NCID
AN0010806X
出版者
島根大学文理学部
出版者別表記
The Faculty of Literature and Science, Shimane University
資料タイプ
紀要論文
部局
総合理工学部
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