портландцемент

Matrix:CaO,SiO,Al2O3,Fe2O3 Large companies in thecement production and exports to overseas markets has accumulated a wealth of experience. Quarry After they are quarried the raw materials (limestone, marls, etc.) are first crushed and then move on to an initial blending stage (pre-blending). Raw-material grinding These raw materials, possibly with several additives are simultaneously dried and crushed until a very fine powder is obtained, which is then batched and stored. Cement grinding Very fine grinding of the clinker together with a binding regulator and perhaps other additives gives rise to the various types of cement that meet the various standards. Storage and Despatch The cement is then pumped to storage silos and it may then be sold in bulk or packed in paper bags that are shipped out on pallets or packet packed. Despatch can be by lorry, train or ship, as necessary.