Method of manufacturing high purity calcium carbonate
作者： Fred R. Huege
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摘要: Flue gases exhausted from a lime kiln (10) containing dust are treated to produce high purity calcium carbonate precipitate. This is accomplished by passing the flue through separator (12) so that oxide removed remaining gas (15). The mixed with water an aqueous suspension of formed. Quicklime or in thus hydrated form hydroxide. solids within then allowed settle settling tank (14) clear, saturated solution hydroxide having pH about 12.4 contacted carbon dioxide reaction (16) reacts precipitate supernatant thickener (20). separated water, while recycled conduit (24) and used as suspension.
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