Gigantic loading machines with steel chain protected wheels carry the rock bulk onto dumpers. In the pre-crushing plant, jaw crushers act like huge nut-crackers, crunching the delivered rocks of different sizes between their steel plates. Once the stones have reached a certain size, they are washed. This removes all impurities and very fine particles. Thus refreshed and sorted, they travel from one conveyor belt to another, over oscillating screens with different mesh sizes, being sorted according to their size class. Now our crushed limestone is ready for being processed into the different KFN lime and limestone products. For the production of quicklime, only stones of the highest purity are used.