Cement raw materials production technology

Cement raw materials production - the process is expensive and energy intensive, but the result is worth it - at the outlet is one of the most popular building materials to be used both independently and as a component of other construction materials (e.g. concrete and reinforced concrete). Cement plants are typically located immediately on the site of production of raw materials for cement production.

The two stages of cement raw materials production

The first stage of cement raw materials production - clinkering.

The second of cement raw materials production- making the clinker to powder with the addition of gypsum or other additives.

The first stage is as follows: the first stage - a production of raw materials. Development of calcareous deposits is usually a drift, i.e., the part of the mountain, "move down", thus opening up a layer of yellowish-green limestone. This stuff goes on the conveyor at the crushing of pieces equal to 10 cm in diameter. After that dried lime, and the process of grinding and mixing it with other components. Further, this raw material mixture is subjected to firing. So get clinker.

The second stage also consists of several stages. They are: clinker grinding, drying mineral supplements, gypsum crushing, grinding clinker with gypsum and active mineral additives. However, we must bear in mind that raw material does not always happen the same, and the physical characteristics (such as strength, humidity, etc.) in various materials. Therefore, for each type of raw material has been developed a method of production. In addition, it helps to ensure a good homogeneous grinding and thorough mixing of components.

Three ways to prepare the cement raw materials

The wet method of production used in the manufacture of cement from chalk (carbonate component), clay (silicate component) and an iron supplement (converter sludge, iron product, pyrite cinders). Humidity clay is not to exceed 20%, and moisture content of chalk - 29%. The output is a charge in the form of an aqueous slurry - slurry moisture content 30 - 50%. Then the sludge enters the kiln, which reaches a diameter of 7 m, and length - 200 m or more. During firing of the raw materials are allocated carbon dioxide. After that, beads, clinkers, which are formed at the outlet of the furnace, ground to a fine powder that is cement.

The dry method consists in the fact that the raw materials before grinding or in the course of its dried. And the raw material charge comes in the form of finely divided dry powder.

Combined method, as the name implies, involves the use and dry and wet methods. The combined method has two versions. The first assumes that the raw material mixture is prepared by the wet method in a slurry, then it was dehydrated to a moisture content in the filters 16 - 18% and sent to the kiln in the form of semi-dry mass. The second option is to making the exact opposite to the first, first use a dry method for the production of raw mix, then add 10 -14% water, granulated, grain size is 10 - 15 mm and supplied to the firing.

The main equipment of cement raw materials production

Drum furnace (shaft furnace);
Rotary kilns;
The instrument for pre-heating of raw materials;
Grinding mills;
Refrigerant;
Rolls;
Dryer (dryers);
Centrifugal scrubbers;
Dust collector,Dedusting units;
Bag filters;
Separator;
Equipment for pre-homogenization;
Jaw crushers;
Hammer mills;
Roller crushers (Rolling crushers);
Cone Crusher;
Transporters;
Packer;

SBM - your reliable supplier of raw materials production plant

SBM Machinery Company manufactures equipment for the production of cement, as well as technological project predlagaet turnkey plant for cement production capacity from 40,000 tons / year to 2.5 million tons / year.

The equipment for its performance and reliability will not concede the leading European brand, and the cost will be much cheaper.

Every client is invited to services:

• Design of a cement plant.
• Production of equipment for cement processing.
• Supervision of cement plant construction.
• Launch of the plant.
• The after-sell service.