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Blade milling machine: Engineers' Digest, Vol. 5, No. 7

Publisher
Elsevier Science
Year
1948
Tongue
English
Weight
143 KB
Volume
246
Category
Article
ISSN
0016-0032

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โœฆ Synopsis

CURRENT TOPICS. 535 melted--the 6000ยฐF. required to :melt tungsten is higher than any substance which might be used for a container. By chemical means the oxide of tungsten is recovered from the ore and heated in an electrical furnace with hydrogen gas. The hydrogen and oxygen combine, leaving tungsten powder which is pressed into bars. The bars are subjected to a heavy electrical current, raising the temperature of the tungsten to a point where it fuses into a rod.

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melted--the 6000ยฐF. required to :melt tungsten is higher than any substance which might be used for a container. By chemical means the oxide of tungsten is recovered from the ore and heated in an electrical furnace with hydrogen gas. The hydrogen and oxygen combine, leaving tungsten powder which is

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## 298 CURRENT TOPICS. [J. F. I. in basic refractories and for making magnesium metal so much needed in the production of munitions and armament in Canada's war effort. This contribution to metallurgical science has also made possible the development of .limestone deposits which previously had r