Energy, fuel types charcoal

Charcoal and sulfur were the earliest pyrotechnic fuels. The choice of fuels is very wide, ranging from metallic to non-metallic elements and binary compounds to various types of carbonaceous materials, both natural and synthetic. The main fuels are aluminum and magnesium powders, their alloy, sulfur, lactose, carbon and carbonaceous fuels etc. The fuels listed below are usually powdered materials, which when oxidized provide heat energy. 

The drying step of necessity must be relatively slow to avoid bubbles, etc., and the web speed in commercials ovens is usually restricted to 25-50 yards per minute. Hot air ovens are the most common type of dryer, although the air flow is often supplemented by infrared heating. For solvent operations the modem oven either incinerates the solvents, for fuel value, or permits recovery of the solvent by condensation or by absorption on activated charcoal." The energy requirements for drying latices are actually less than for solvents since less hot air is required the air volume must be large to avoid an explosive concentration of vapors in the case of solvents. 

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