process for the production of dry gelöschtem aqueous lime

摘要

1522308 Hydration of lime ASSOCIATED PORTLAND CEMENT MFRS Ltd 4 Nov 1975 [11 Nov 1974] 48692/74 Heading C1A Dry slaked hydrated lime is produced by adding to lime produced by firing calcerous matter, which is passing directly through a rotary cooler from a lime-producing kiln, the requisite amount of water to yield hydrated lime at the cooler outlet. This is conveniently performed by inserting a water feed pipe into the outlet end of the cooler so that it extends into the cooler for a suitable distance, such as “ to ¢ the length of the cooler. The residence time of the solids from the water application point to the cooler outlet is preferably 7-15 minutes, and the temperature generally 100-500‹C. The heat developed in the hydration reaction may be carried by counterflow air to the lime-kiln to support combustion.