The limestone is a rock composed in its majority by calcium carbonate, and it is found in the geologic formations of sedimentary nature. The carbonate of calcium has a marine origin, and it is the product of the sedimentation of microorganisms on the bottom of the oceans during hundreds of millions of years. These sedimentary layers had compacted and, under the action of internal tensions, they have formed mussifs calcareous more or less apparent according to the erosion that they have suffered in the course of the time.
In certain limestones, the carbonate of calcium is associated to a carbonate of magnesium, and in that case it is called dolomitic limestone. Its calcination gives origin to the dolomite lime, product very used in the iron and steel industry and in the production of refractories.
Once the mineral is extracted, before calcination and to be able to carry out this process correctly, it should be crushed and screened, in order to have the appropriate sizing. This process is of great importance to reach a good productivity and a good quality of the lime or of the dolomitic lime.
© Caleras de San Cucao, S.A.