Coboce

is the process of reduction in size of the raw material to diameters suitable for the next stage. The limestone is crushed in the quarry about 20 km from the plant, and the rest of the raw materials (iron, clay, plaster and pozzolana) are crushed in the plant. In the process of crushing the thick material enters the camera of grinding where is reduced in size until the residue on sieve of pl. 1 not exceeding 25%.

crushed limestone is stored in silos and after the respective quality control, sent to plant through volquetas.