2. Lime industry

Crushing of raw materials

Limestone is crushed to a maximum size of 250 mm using jaw crushers coupled with screens. Product grain sizes range from 15 to 150 mm for vertical kilns and from 5 to 40 mm for rotary kilns. In most installations, products smaller than 10 mm are not used to manufacture lime, but can be recycled in the form of carbonates.

Quicklime grinding

Quicklime is ground to grain sizes of less than 2 mm using unirotor or birotor articulated hammer mills, which process less than 120 mm kiln output. The result is a product in which 70% by mass of the particles exceed 80 µm. Elements coarser than 2 mm are screened.

Ball mills are used to prepare fine lime