Summary : After being metered from the kiln feed enters an air slide and then into a high pressure air pump, which conveys the materials to the top of a preheater tower.
After being metered from the kiln feed enters an air slide and then into a high pressure air pump, which conveys the materials to the top of a preheater tower. The cement clinker enters the tower at a temperature of 90ºC (194ºF) and within 20 seconds falls through the tower and emerges from the bottom at a temperature of 850ºC (1562ºF).
From there the kiln feed enters the kiln where it is heated to 1400ºC (2552º F), resulting in the creation of clinker. After cooling, grinding, and milling the clinker into cement the finished product is stored in one of the companies 24 on-site silos. From there it can be easily shipped to customers in bags and bulk form, by rail or truck.
Grinding plant of cement is an important topic when it comes to energy consumption. The clinker grinding ball mill is responsible for around 40% of the total energy usage during cement production line. Therefore intergrinding is a potential way of saving considerable amount of energy since some mineral admixtures have a clear positive influence on the grindability of clinker.
They composed two blended cements with two different clinkers, natural pozzolans, and gypsum in the proportions by intergrinding for 90 and 120 min and compared them to their reference Portland cement. They stated that after 90 min of grinding the amount of material retained on the 15 µm sieve was larger for blended cements than for the reference cement clinker.