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Calciner preheater
The preheaters from METSO is available in either rectangular or polygonal shapes. Composed of a floor, roof, and rams, it admits the limestone at the top and flows down and piles up. Hydraulic cylinders push the rams in order to slide the pile down to the kiln. The unit is made to extract the heat from the exhaust while simultaneously heating the stone. The rams work at preset intervals to provide exact feed to the kiln.