Starch dust explosions

Starch Dust Explosions. See under Dust Explosions in Vol 5, D1578-R to D1579-R... 

It was for reasons such as the above that a starch dust plant recently constructed in the southwest, where weather conditions are moderate the year round, has been built entirely of open construction so that there is no confinement of the force of any explosion and the constant flow of air through the plant provides little opportunity for dust layers to build up... 

Starch dust can produce an extremely explosive mixture with air. All motors in confined areas must have explosion-proof ratings. The silo and all conveying equipment must be grounded to eliminate static electricity. Furthermore, starch silos must be equipped with an explosion relief deck to provide an escape route in case of a dust explosion. Another requirement is a vacuum relief valve to prevent the silo from caving in, in case a starch bridge in the silo suddenly collapses. The starch content in the... 

EXPLOSION and FIRE CONCERNS combustible solid NFPA rating Health 0, Flammability 1, Reactivity 0 not considered to be a fire hazard remote possibility of a dust explosion exists if mixed with air in the proper proportions (similar to flour or starch) fires have been known to occur in warehouses in which telephone books were stored, due to heat buildup... 

Starch dust is a respiratory tract irritant OES (8-hr TWA) total inhalable dust 10 mg m, respirable dust 5 mg m. Mod. explosive when exposed to flame. Phosphate [11120-02-8]... 

NFPA 61A Standard for Prevention of Fire and Dust Explosions in Facilities Manufacturing and Handling Starch. 

Dust particles have a lower explosive limit expressed in mg/m and almost no upper limit. Examples of LEL for dusts are polystyrene, 0.02 mg/m corn starch, 0.04 mg/m and coal, 0.055 mg/m. ... 

Fe, Ti, Mn, Ni, Co, etc, which can form in plants polishing metals or in plants manufg pyrotechnics) suspensions of finely divided coal, coke or charcoal suspension of finely divided cereals ( such as of flour, rice, oats, starch, ecc) suspension of wood dust suspension of sugar dust suspension of explosive particles (such as of TNT, PA, Tetryl, etc)... 

Himalaya s Explosives (Portugal). KC103 60-80, starch, charcoal etc 10-25, oil 4-10, metallic dust or powder 2-10, metallic oxides, or dehydrated CuS04 2-5%... 

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