dry and wet process of manufacture of cement

Cement production process, each producing one ton of cement grinding at least three tons of materials (including raw materials, fuel, clinker, mix, gypsum). According to statistics, dry grinding work, electricity consumption accounts for about 60 percent of the power plants. Therefore, a reasonable choice of grinding equipment and processes, optimization of process parameters, the correct operation, job control system to ensure product quality, reduce energy consumption is important.

wet process of manufacture of cement

The wet process of cement manufacturing includes incorporating water to finely crushed raw material, for instance limestone, clay or iron ore, inside a proportion of 35 to 50 percent water to 50 to 65 percent raw material to make a slurry that may be fed right into a cement kiln, whereas no water is additional from the dry process. Rather, the raw material is fed in to the kiln in its dry state.
Historically, the wet process was utilized in the absence of effective mixing techniques. Making a slurry features greater control in excess of the chemistry in the mixture, resulting in a granular crumble that is most effective for heating from the kiln. The key disadvantage of this process is that evaporating the water in the slurry uses a sizable volume of fuel. This takes far more time since the mix stays while in the rotary kiln for two to 3 hrs in contrast to 20 minutes with all the much more modern dry process, which uses compressed air to combine the dry material.
The wet process also calls for a bigger kiln to facilitate the evaporation from the slurry in advance of heating happens to produce the clinker, which resembles grey balls. The output clinker is cooled, ground finely then mixed with gypsum and limestone to provide the finished cement.

dry process of manufacture of cement

During the dry process, every raw material is proportioned to meet a preferred chemical composition and fed to both a rotating ball mill or vertical roller mill. The raw materials are dried with waste process gases and ground to a dimension the place the majority of the materials are lower than 75 microns. The dry materials exiting either sort of mill are known as “kiln feed”. The kiln feed is pneumatically blended to insure the chemical composition in the kiln feed is very well homogenized then stored in silos until required.