Molten Aluminum-Water Explosion Initiation Mechanism Study (Final Report).
NIOSH 1975 Sep:299 pages
Mechanisms for initiation of molten aluminum and water explosions were evaluated using bleed out simulations, chemical assessment of initiation, and mechanical, thermodynamic, and other potential initiation mechanism studies. Spontaneous nucleation of liquid quench water contained in quench pit surface capillaries was identified as the most probable initiation mechanism. An impact generated shock from aluminum flow over the quench pit surface was the most probable and frequent triggering mechanism for collapsing the vapor film which separates the molten aluminum and liquid water. Vapor film thickness reduction correlated with the time that the aluminum flow impacts quench tank side surfaces. The author concludes that the aluminum industry's current safety practices, which emphasize the elimination of the surface cavities which trap the liquid water required for initiation of the explosion, are a step in the right direction.
NIOSH-Contract; Contract-095-73-0027; Aluminum-production; Industrial-factory-workers; Industrial-processes; Explosiveness; Thermodynamic-reactions; Phase-transformations; Safety-measures;
NTIS Accession No.
NIOSH, Cincinnati, Ohio, NIOSH Contract No. 095-73-0027, 299 pages, 330 references