Arabian Qatrana Cement

Production Process

Portland Cement is made primarily from a combination of a calcareous material, such as limestone or chalk, and of silica and alumina found as clay or shale.The manufacturing process consists essentially of grinding the raw materials into a very fine powder, mixing them intimately in a predetermined proportion, and burning them in a large rotary kiln at a temperature of about 1400 ˚C (2550 ˚F). When the material sinters and partially fuses into clinker, the clinker is cooled and ground to fine powder with some gypsum added, and the resulting product is the commercial Portland Cement .
First stage: Extraction of Raw Materials
The raw materials needed to produce cement (calcium carbonate, silica, alumina and iron ore) are generally extracted from limestone rock, chalk, clayey schist or clay. These raw materials are extracted from the quarry by blasting. They are then crushed and transported to the plant where they are stored and homogenized.
Second stage : Raw Grinding and Burning
Once the homogenization process is complete, the raw mix – or “kiln feed” – is fed into a preheating tower where it is heated and starts to react chemically by counter flow process; as raw meal moves downwards by gravity, and hot gases resulting from the fuel combustion in the rotary kiln move upwards. Kiln feed is heated from approximately 80°C up to 850°C, causing a series of chemical reactions that include moisture evaporating, limestone calcination and primary bonds between raw materials are created. During this process, the emitted gases – which include CO2 as a result of the calcinations process – are cooled down from 1,050°C to 350°C, to be used afterwards to dry out the wet raw materials during the grinding process. Calcined raw materials are fed to the rotary kiln where they are burnt at 1,450°C to produce the main cement constituent “Clinker”.
Third stage: Cement Grinding and Shipping
While grinding cooling stage, gypsum is added to the clinker and the mix is then finely ground to a form of grey powder called “cement” in a special cement mill, which is similar to a raw material mill but relatively larger in size. The ground cement is then mechanically packaged in paper bags and loaded onto trucks to be transported to the marketplace.

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AMMAN, Mecca Str.
Mecca Towers Center (Salam 1),
Building No.174 2nd floor, office No.201
P.O .Box 3502
Amman 11821 Jordan

Phone: +962 6 5808800
Fax: +962 6 5524964

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