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Rotary kiln can be divided into metallurgy kiln, chemical engineering kiln, and building material kiln according to its different dealing materials. The building material kiln is mainly used in calcining clinker cement, limestone and porcelain granule. Metallurgy rotary kiln is mainly used for the magnetizing calcining of lean iron ore in iron and steel plant in metallurgy industry, the chromites and josephinite oxidizing calcining , calcining of dewalquite and clinker aggregate and aluminum hydroxide roasting in aluminum factory; Chemical engineering rotary kiln is used in chemical plant for chromium ore and chromium ore powder roasting. The limestone kiln( activity limestone kiln ) is used for calcining activity lime and dolomite in iron and steel plant and ferroalloy works
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