Energy consumption is known to be one of the
main operational expenses that cement factories have to meet to carry out the
production cycle of concrete. The process leading to the development of clinker
from raw materials is a special baking made with appropriate kilns that work 24
hours a day.
After extraction, grinding and homogenization,
the raw materials mixture is fed in the kiln, where, by heating up to 1.400-1.500 °C, clinker is
generated. Forecasting the energy consumption of a cement factory is not easy,
as it is influenced by many factors. As a general rule, we can assert that the
type of process and the raw materials resistance to baking are determining
elements. The table sums up the data concerning the energy demand at the
various steps. Though these are approximate figures, the data shown can be very
useful to better understand the single stages of the process and to judge their
effect on the total amount of operational expenses.