Cement Manufacturing Process Phase 1: Raw Material Extraction Raw materials are extracted from the quarry and by means of conveyor belt material is transported to the cement plant There are also various other raw materials used for cement manufacturing For example shale, fly ash, mill scale and bauxite These raw materials are directly brought from other sources because of small requirements..
Cement is so fine that 1 pound of cement contains 150 billion grains The cement is now ready for transport to ready-mix concrete companies to be used in a variety of construction projects Although the dry process is the most modern and popular way to manufacture cement, some kilns in the United States use a wet process..
The clinker manufacturing process The clinker manufacturing process starts with the extraction of the raw meal from the homogenization silo to insure that the raw meal is stable and homogenized in order to produce consistent clinker quality The preheating of the material takes place in pre-heater cyclones fitted with a pre-calciner fired...
Making the Clinker To make cement, a perfect proportion of four basic oxides are important Calcium oxide should be 65%, iron oxide should be 5%, alumina oxide should be present at 10% and last but not the least silicon oxide should be present at 20% ratio At around 2000 degree centigrade temperature inside the kiln, a new substance is produced, known as clinker..
4 Cement production The clinker is processed into different types of cement Apart from gypsum and clinker, various additives such as slag sand, trass and fly ash are also ground up with them, depending on the type of cement required The MULTIDOS® weighfeeder feeds material into the mill, similar to the earlier feeding into the raw mill..
RAW GRINDING - The process of grinding of limestone and additives into a powder to be fed into a cement kiln in order to produce clinker The additives may include sand,shale, iron ore, bauxite, and flyash among others..
Summary of production process After cooling, the clinker may be stored temporarily in a clinker store, or it may pass directly to the cement mill The cement mill grinds the clinker to a fine powder A small amount of gypsum - a form of calcium sulfate - is normally ground up with the clinker..
Hot clinker In the manufacture of Portland cement, clinker occurs as lumps or nodules, usually 3 millimetres (012 in) to 25 millimetres (098 in) in diameter, produced by sintering (fused together without melting to the point of liquefaction) limestone and aluminosilicate materials such as clay during the cement kiln stage..
Early historyEdit Portland cement clinker was first made (in 1825) in a modified form of the traditional static lime kiln The basic, egg-cup shaped lime kiln was provided with a conical or beehive shaped extension to increase draught and thus obtain the higher temperature needed to make cement clinker..