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The case study is on the use of pulverized anthracite and coke oven gas as a fuel for the twin shaft regenerative kiln in quick lime manufacture. The study has successfully proved the suitability of the above fuels as economic and practical alternatives.

CIMPROGETTI S.p.A's CIM-ISSY 32 advanced control system accurately collects and handles data allowing for the production of better quality lime. CIM-ISSY 32 collects, handles and analyzes large quantities of process and operation data of lime plants, directly impacting on lime quality and fuel efficiency. The evolution and modules of the system are discussed.

The 'Twin D' lime kiln developed by Cimprogretti offers many advantages and has already won many orders. The 'Twin D' is a version of Cimprogetti's Cim-Reversy line of twin shaft regenerative kilns. The Cim-Reversy units, with capacities of 100-250 t per day, offer features including automated cold start-up procedures; a variable pre-heating zone; and improved cooling air distribution. The 'Twin D' is aimed at capacities of 150-450 t per day, and offers improvements including the unique shape of the kiln shaft cross section, which minimises cleaning and so extends the kiln's operating life.