Lime kilns history

Yields of 50% and reduced energy consumption have been achieved by a history of innovation. Such innovation has included the Tomlinson black liquor recovery boiler, the Kamyr continuous digester and associated diffusion washer, multiple-effect evaporators, and low-odor concentrators. Economic advantages also have been gained by the development of systems for recovering extractives such as tall oil, fatty acids, and resin from the pulping liquor for sale as naval stores. Future innovations may focus on the lime kiln and other related systems. 

It should be noted that the response time of lime reactivity, which partially reflects conditions in the calcining zone, may be less than the residence time of the burden in the kiln, whereas that of % CaCOs, which reflects the time-temperature history throughout the kiln, may be longer than the residence time. 

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