Answer / rakesh

In chemistry, a catalyst is a substance that causes or accelerates a chemical reaction without itself being affected. Catalysts participate in the reactions, but are neither reactants nor products of the reaction they catalyze.

hi every one, i want to make a coal grinder to mil 3 or 4 tons of coal dust per hour . if you guys help me with photos or some tecnical drawings that would be very kind of you.

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