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#0183;#32;VRM vs Ball Mill for Cement Grinding. Good Days! Gentlemen, Anybody in this forum who have had some practical/extensive experience on Vertical Roller Mill being used for cement grinding? We are planning to put up a new cement grinding plant using Vertical Roller Mill(300350 TPH) and before implementing the project, we would like to
Vertical roller mill has many different forms, but it works basically the same. All of these forms of machine come with a roller (or the equivalent of roller grinding parts), and roller along the track of the disc at the level of circular movement imposed by external grinding roller in the vertical pressure on the disc on the material being the joint action of compression and shear, and to crush.
Slag vertical mill not only make the system parameters more reasonable,it also greatly saves energy of start and stop vertical mill. the system can reduce system power consumption. However it is not to blindly pursue high yield, Increase production and improve the rotation rate is complementary to each other, Vertical mill and dust collector is a major system air leakage point.
Vertical mill grinding and cement water demand. Although the vertical grinding final grinding system has many advantages such as high grinding and drying efficiency, good adaptability to the grinding materials, simple process flow, compact space arrangement and low maintenance cost, cement grinding is the guarantee of the quality of cement
#0183;#32;Vertical roller mills are developed to work as airswept grinding mills. Roller mills are operated with throughput capacities of more than 300 t/h of cement raw mix (Loesche mill, Polysius#174; double roller mill, Pfeiffer#174; MPS mill). Loesche roller mill and Polysius#174; roller mills are widely applied in cement raw material grinding.
The vertical mill option has been slower to enter the cement grinding market. Grinding bed stability problems offered a challenge which the major manufacturers battled with, until finally a significant number of mills began to be installed in the late 1990s, and this has multiplied in the past decade.
energy consumption and a correspondingly steeper PSD curve. cement in a vertical roller mill, the layout, as shown in Figure 7, is prepared with provisions for recirculation of hot mill exit gas to the mill inlet to maintain a proper, . cement grinding. 2 %
#0183;#32;Cement production in the world is currently about billion ton per year. About 2% of the electricity produced in the whole world is used during the grinding process of raw materials .While total electrical energy consumption for cement production is about 100 kWh/ton of cement, roughly two thirds are used for particle size reduction .
The vertical mill cement grinding power consumption is low, grinding cement does not need auxiliary cooling, and the residence time of the material in the mill is very short, can quickly convert from one species to another species, does not need to be a lot of grinding material out, but also in the production process of rapidly changing product particles.
Summary: 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
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