Small river pebble rotary kiln in southeast asia pebblelime from preheaterkilns lime made in a coalfiredrotary kilnhas two distinct parts the interior of thepebblewhich constitutes about 90 to 95 of the mass and the surface dust layer which is the remaining 5 to 10 uncalcined carbonate and impurities in the product may be present and will not contribute to the hydration reaction sulfur in
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