Cement clinker is a solid material produced in the manufacture of Portland cement as an intermediary product. Clinker occurs as lumps or nodules, usually 3 millimetres (0.12 in) to 25 millimetres (0.98 in) in diameter. It is produced by sintering (fusing together without melting to the point of liquefaction) limestone and aluminosilicate materials such as clay during the cement kiln stage.
Cement is such a fine powdery substance that each pound of cement contains 150 billion grains. 3: Clinker is produced inside the kiln during the cement manufacturing process. Raw mix is heated and then rapidly cooled to produce the marble-sized pellets of clinker. Read: Clinker Manufacturing Process. Cement is produced by grinding clinker ...
Clinker, combined with additives and ground into a fine powder, is used as a binder in cement products. Different substances are added to achieve specific properties in the produced cement. Gypsum added to and ground with clinker regulates the setting time and gives the most important property of cement, compressive strength.
A cement mill (or finish mill in North American usage) is the equipment used to grind the hard, nodular clinker from the cement kiln into the fine grey powder that is cement.Most cement is currently ground in ball mills and also vertical roller mills which are more effective than ball mills.
Apr 15, 2021· Therefore, limiting grinding power demand is a major industry focus. The end-product evolution is another key issue to address, with respect to the expansion of the cement additives range and cement/clinker ratio, as well as the emergence of ultra-fine products in the cement industry.
The clinker and the required amount of gypsum are ground to a fine powder in horizontal mills similar to those used for grinding the raw materials. The material may pass straight through the mill (open-circuit grinding), or coarser material may be separated from the ground product and returned to the mill for further grinding (closed-circuit ...
Aug 30, 2012· There is a horizontal filled with steel balls. Clinker reach in this rotating drum after cooling. Here, steel balls tumble and crush the clinker into a very fine powder. This fine powder is considered as cement. During grinding gypsum is also added to the mix in small percentage that controls the setting of cement.
It is generally added in very small amounts (about 2% by weight) to the burnt cement (called Clinker) after it is taken out from the kiln and before it is sent for grinding. Gypsum is a sedimentary rock having a composition of calcium sulfate (Ca SO 4 . 2 H 2 O).
Grinding clinker and gypsum produces ordinary Portland cement (OPC). Fly ash / Slag at required proportion is ground along with clinker and gypsum to produce Portland Pozzolana cement (PPC) / Portland slag cement (PSC). The ground cement is stored in concrete silos and packed in 50kg bags using electronic packing machines.
Clinker is usually in the form of greenish black or grey colored balls. Grinding the Clinker with Gypsum. The Cement Clinker is then air cooled. The required amount of Gypsum (5 %) is ground to the fine powder, and then mixed with the Clinker. Finally cement is packed in bags and then transported to the required site. Setting and Hardening: