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Enter the identification number (ID No.) for the affected facility (maximum 10 characters) at the metallic mineral processing plant (i.e., crusher, screen, bucket elevator, conveyor belt transfer point, thermal dryer, product packaging station, storage bin, enclosed storage area, truck loading station, truck unloading station, railcar loading station or railcar unloading station at the mill or ...
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Exemptions Feed and product conveyors, vertical shaft kilns in the magnesium compounds industry; the chlorination-oxidation process in the titanium dioxide industry; coating kilns, mixers, and aerators in the roofing granules industry; and tunnel kilns, tunnel dryers, apron dryers, and grinding equipment that also dries the process material ...
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The slurry is thickened, washed, and filtered before being calcined in rotary calciners or in Herreshoff furnaces (multiple hearth furnaces). Occasionally additives such as lime are added prior to calcination to meet the product specifica- tions of customers. Rotary calciners can produce either caustic-calcined magnesia or dead-burned magnesia.
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