The thermal efficiency of the electric furnace
- Publisher
- Elsevier Science
- Year
- 1915
- Tongue
- English
- Weight
- 65 KB
- Volume
- 180
- Category
- Article
- ISSN
- 0016-0032
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π SIMILAR VOLUMES
## I29 (Stated meeting held Thursday, December 20, z9o6.
SCHIEPFELlI\'--J~NUBBCTURE .OB LITHIA FROM LEPIDOLITE. 649 1 scnt an actunl (Iecomposition of 95.3 per cent. Por ~ 3 Iiours, tcmp. in furnnco WRS 120" C. ; I hour at. 130' C. ; New York Section. 13 hours nt-150' C. ; I+ hours n t 104' C. ; .l.hour at ?a09 C. ; hour nt 340' L ! . ; i i total of eight
ductility of tungsten so that it can be made into wire for lamp filaments. The tungsten is treated at red heat with a mixture of hydrogen and sulphur chloride. This removes any tungsten oxide, which is a cause of brittleness. The oxide is converted into sulphide, and the sulphide reduced by hydrogen