Tom Brown Knife Diagram

How to make cement


Cement industry is one of the major branches of material production. The value of this industry in the national economy is determined primarily by its inextricable link with the progress of capital construction. Cement - one of the main building materials for the manufacture of concrete, concrete products, as well as to bond the individual components of building construction, waterproofing and many other purposes.

last summer I had a shot at the factory Lafarge («Uralcement) located in the village of Pervomaisky, Chelyabinsk region. The plant produces cement by the wet method since 1957 and production volume is in the top ten largest cement plants in Russia. For the production of cement using clay and limestone. The fuel serves natural gas.


History of Portland begins October 21, 1824, when the English stonemason Joseph Aspdin received a patent for a substance which is called "Portland cement" because its color resembled the gray rocks that were around the town of Portland.

Portland cement - a hydraulic binder, obtained by co-pulverizing Portland cement clinker, gypsum and specialty additives. Properties Portland depend on the composition of clinker and its degree of refinement. The most important property of Portland cement - the ability to harden in contact with water. It is characterized by brand of Portland cement, as determined by the compressive strength and flexural strength of reference cement-sand mortar after 28 days of hardening in wet conditions.



2. cement production consists of two basic processes: production of clinker (the most time-consuming and energy-consuming stage) and grinding with appropriate additives.


3. for cement production, first mined limestone and clay from the quarry.


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6. After preprocessing, the raw materials arrive in wet autogenous mill "Gidrofol, which are processed into sludge. Then domalyvaetsya sludge in the raw mills and averaged into shlambasseynah.


7. The plant has a special lab, which produces a constant quality control and dosage of raw materials and additives. Including conducting tests of the final product strength.


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11. then finely raw sludge is introduced into a rotary kiln (length of 200 meters and a diameter of 4 meters) and fired at 1450 degrees Celsius.


12. When roasting pieces of material fused together to form clinker.


13. Furnace is a rotating metal cylinder which is tilted to the horizontal plane at an angle of 3-4 degrees, to allow movement of material along the furnace.


14. obtained clinker is cooled in refrigerators, crushed and fed into conveyors hoppers for cement mills for grinding.


15. Electrostatic on rotating stoves can reduce dust emissions into the atmosphere by 10-30 times.


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18. Ostyvshy clinker is fed into the mill.


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20. This the most bustling area of production. Is in the shop without headphones is simply impossible.


21. Cement is produced by co-pulverizing Portland clinker and mineral additives (10-15%) and gypsum (3-7%), which serves to regulate the setting time. The grain size of cement in the range from 1 to 100 microns.


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24. procedure LOTOTO (LockOut / TagOut / TryOut). Set of actions to improve safety in the workplace.


25. Various mineral supplements are to make concrete, mortar and other cement-based products of special properties (cure speed, stability in natural waters, frost).


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28. resulting Portland cement is transported from the mills to storage silos.


29. From silos cement shipped by railway cars and trucks as follows: bulk, special containers weighing up to MRP 1 ton of paper bags of 50 kg.


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