Patent ID: 8153088

Claim:
A method for batch wise slaking of burnt lime in a slaker, in which lime slurry is produced, comprising the following process steps: after slaking burnt lime in a slaker, emptying the resulting completed slaked and diluted lime slurry from the slaker, until a predetermined amount of residual slurry is reached, which residual slurry is used for mixing with a next batch of burnt lime; transportation of the next batch of burnt lime into the slaker; calibration of a load cell aggregate to 0 kg; automatic initiation of a control system for automatic operation after reaching a desired slaking temperature, which adds diluting water and thereafter burnt lime of a predetermined amount in the following steps; automatic regulation of the slaking temperature, where the ratio of water and lime is adjusted if the required slaking temperature was not reached in the previous batch, or missed, and where the slaker is completely filled with water for interruption of the slaking if a given maximum temperature is exceeded; and automatic registration of the slaker's remaining slurry weight amount after completion of the transportation of the next batch of burnt lime into the slaker and following the calibration of a load cell aggregate to 0 kg, before the next slaking, characterized in that to prevent build-up of limestone in the slaker, after the transportation of the next batch of burnt lime into the slaker and the calibration of the load cell aggregate, a number of valves are opened after fixed time periods for addition of flushing water to respective nozzles for immediate cleaning of the slaker before the next slaking, in that the flushing water is supplied sequentially via each valve to associated nozzles, until a total predetermined amount of flushing water is reached in the slaker.