Описание: Cement grinding mill is usually ground using a ball mill. This is essentially a large rotating drum containing grinding media - normally steel balls. As the drum rotates, the motion of the balls crushes the clinker. The drum rotates approximately once every couple of seconds. The drum is generally divided into two or three chambers, with different size grinding media. As the clinker particles are ground down, smaller media are more efficient at reducing the particle size still further.
The main trends concerning grinding processes in the cement industry are still higher efficiency, reduction of the power consumption and system simplicity. In the case of new orders, vertical mills have increased their share to over 60 % and ball mills have fallen to less than 30 %. It is somewhat surprising that the number of different grinding processes and mill types used by the industry have increased rather than decreased.
Cement production usually comprises two phases. In the first phase, limestone is sintered with clay to produce small cement balls. These balls are then grinded along with gypsum or fly ash which acts as an additive in the powdered cement. The proposed mill would require about 60 acres of land. The cement industry makes use of four mill types: the ball mill, the vertical mill, the roller press (also known as high-pressure grinding roll) and the horizontal mill. A report on the development over time towards those mill types, which was largely determined by efforts to achieve higher energy efficiency. However, it also has to be taken into consideration that the different mill feed raw material, coal, clinker and slag have different grindabilities, feed particle size ranges and moisture contents and also demand different throughput rates, fineness data and other quality parameters.
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Дата публикации: 24 ноября 2014
Местонахождение: Кайфенг, Хэнань, Китай