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Energy saving effect of different grinding process, the pre grinding equipment in the whole system to undertake the grinding task, the corresponding energy saving effect is not the same. From the pre grinding, mixed grinding to some end grinding of the three ways of energy saving effect is more obvious than one. With the increase of the power consumption of the pre grinding equipment, the energy consumption of the mill is reduced, and the total energy consumption of the whole mill and pre grinding equipment is reduced. All the energy consumption and the energy consumption of the mill were reduced to 0 by the end of the grinding equipment. Therefore, the energy saving effect of the pre grinding system of roller press and the vertical roller mill must be in the same process, the same energy consumption condition of the pre grinding equipment is meaningful.
Different system pre grinding equipment can absorb the power consumption is not strictly required. This product than area and equipment with 6-1 different pre grinding system flow chart 21 is set on. In the 3200cm2 / G ratio area of cement, the general pre grinding (including hybrid grinding) system is less than t / 7.0kwh, and the final grinding system can reach 12.0kwh / T.
In the pre grinding (or mixed grinding) range, the system energy consumption of the two kinds of pre grinding equipment is basically equal, and the system of vertical roller mill is also slightly lower. The vertical roller mill is feasible in theory, but there is still no practical experience, it is not possible to be further developed.
The configuration of different grinding system equipment can be known by the following: the different grinding system, the power consumption of the pre grinding equipment and the subsequent ball mill are different, and the corresponding equipment is also different. The pre grinding equipment is big, and the relative grinding machine is small. The greater the amount of the grinding equipment, the smaller the total energy consumption.
According to the mechanism analysis, the advantage of the roller press is limited, and the advantages of the vertical roller mill are multi - level repeat grinding. The combination of the two will be beneficial to the improvement of energy efficiency. The overall structure of the roller press is simple but the operation pressure is high and the speed is slow. The vertical roller mill is complex, but the operation pressure is low and the speed is fast. Their advantages will be beneficial to the reduction of large equipment and wear. Different pre grinding process, the energy consumption of the whole system is reduced with the increase of the power consumption and the load of the grinding machine. Therefore, it is important to compare the different grinding system of roller press and the vertical roller mill. According to the present situation, the energy consumption of the two pre grinding system is basically similar, and the vertical roller mill is slightly lower. But in the field of energy saving and energy saving, there is a mature experience in the field of the roller press system, and the vertical roller mill system is not practical, and it needs further development.