Solids mixing dust explosion

Probably the most rare combination is the mixture of AN prills with a solid fuel. To get a good reaction between a fuel and an oxidizer an intimate mixture is needed. This is why monomolecular explosives (with fuel and oxidizer on the same molecule) tend to have higher detonation velocities than composite explosives (where fuel and oxidizer are two separate components). This is also why grain dust explosions occur yet, a pile of wheat is not easy to light on fire. Mixing any solid fuel with prills of AN (which are inch in diameter) will obviously not produce a very good mixture of reactive components. 

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... 

The explosive waste generated during any operation should be collected and maintained separately from conventional waste. Properly labeled scrap containers should be readily available for each class of explosives. Mixing of incompatible explosive wastes should be avoided. Waste collection is normally accomplished by collecting the dust or fibers in a wet/dry vacuum system or by collecting the solid waste in clearly labeled receptacles. 

BINITROBENZENES (25154-54-8) see dinitrobenzenes, mixed isomers. BIPHENYL or 1,1 -BIPHENYL (92-52-4) CijHjo Combustible solid. Forms explosive mixture in air [explosion limits in air (vol %) 0.6 to 5.8 flash point 235°F/113°C cc autoignition temp 1004°F/540°C Fire Rating 1]. Vapor, dust, or mist forms explosive mixture with air. Contact with strong oxidizers can cause fire and explosions. On small fires, use dry chemical... 

EXPLOSION and FIRE CONCERNS combustible, but solid form is difficult to ignite powder form may ignite spontaneously and can continue burning under water powder form is very explosive when mixed with oxidizing agents dangerous explosion hazard in form of dust by chemical reaction with air, alkali hydroxides, alkali metal chromates, dichromates, sulfates,... 

Precaution Combustible solid powd. material may form explosive dust-air mixts. incompat. with strong oxidizers mixing in a nonpolar hydrocarbon can cause static buildup which can cause flash fire Hazardous Decomp. Prods. Combustion prods. CO2, CO FIMIS Flealth 0, Flammability 1, Reactivity 0 Storage Keep container closed CAP-482-20 [Eastman]... 

The dust arising from the mixing or processing of combustible solid materials can form explosive mixtures with air. In the design of plants to handle such... 

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