Extreme duty Lime Slurry application Carolina Stalite Company uses coal-fired rotary kilns to remove impurities from slate. Due to its lightweight nature, this purified slate, also called expanded slate, has a variety of uses including masonry, bridges, and other structures. As with any coal-powered operation, EPA-regulated byproducts of combustion are released and must be dealt with. The plant had been using mechanical double-diaphragm

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