Non-explosive fine metallic powder mixtures for making refractor

Details Non-explosive fine metallic powder mixtures for making refractor Non-explosive fine metallic powder mixtures for making refractor

1994-06-06

1995-10-24

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

75243, 75354, 149110, 501108, 501113, 501127, 501133, C22C 2900

Patent

active

054610125

ABSTRACT:
A substantially non-explosive mixed powder containing finely divided metallic particles suitable for being incorporated in a refractory mixture, intimately mixed together with inert refractory particles. The refractory particles are present in such particle sizes and quantities as ensure that the Minimum Explosible Concentration, as tested in a 20-L vessel with a chemical igniter, is greater than 100 gm/m.sup.3. The inert particles comprise at least 40% of the mixture, and preferably 50% to 80%. The invention also includes a premixed powder, of the metallic and refractory powder, especially as contained in a shipping container in drums or impermeable bags. Due to the presence of the refractory powder, the mixed powder can be shipped without the precautions usually needed for shipping finely divided metal powders.

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U.S. Dept. of the Interior: Bureau of Mines, Oct. 1943 Report of Investigations, "Inflammability and Explosibility of Metal Powders" by Irving Hartmann, John Nagy and Hylton R. Brown. (pp. 27-28).
Database WPI. Derwent Publications Ltd., London, GB, AN80-03355c & SU A, 659,601 (Alum Magn electr Ind) 29 May 1979. See abstract.
Patent Abstracts of Japan, vol. 12 No. 332 (M-738) Sep. 1988, & JP S,63 096 201 (Kurosaki Refract. Co. Ltd), 27 Apr. 1988.

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