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Comparison of grinding technology and equipment energy consumption of different ball mills

Ball mill system: There are many factors affecting the grinding efficiency of the ball mill, including the gradation of the grinding body, the ventilation of the mill, the clinker temperature, and the grinding process. The circle ball milling process with high-efficiency powder separator should be preferentially used. The circle mill is conducive to the adjustment and control of product fineness and temperature. The grinding efficiency is 10% to 20% higher than the open-flow mill. The finer the finished product, the more obvious the advantage.

Roller pre-grinding system: Various pre-grinding systems (including circulating pre-grinding, combined milling, semi-final milling, etc.) consisting of roller compactors and ball mills have become the main solutions for cement grinding. This is because The grinding efficiency of the roller press is about 2 times that of the ball mill, which can greatly save electricity. The power saving level of the roller press system depends on the power consumption of the roller press. For each 1kWh / t consumed by the roller press, the power consumption of the main machine (roller press + ball mill) can be reduced by 0.8 kWh / t ~ 1kWh / t. The power consumption of the roller press has a linear relationship with the projection pressure. The projection pressure of the cyclic pre-grinding roller press is 5500kN / m2 to 6500kN / m2, and the projection pressure of the combined grinding is slightly lower, which is controlled at 5000kN / m2 to 6000kN / m2.

Roller final grinding system: When grinding cement, the grinding efficiency of the roller mill is 1.6 ~ 1.8 times that of the ball mill, and the system saves more than 30% of electricity. Clinker temperature, feed size, abrasion, etc. all have a large impact on output and power consumption. The key is the final grinding cement performance. It is necessary to optimize the cement particle gradation and ensure product performance by adjusting the grinding pressure, the height of the retaining ring, the wind speed and volume, and controlling the outlet temperature. For the raw material mill, if the centrifugal or cyclone powder separator is replaced, the output can be increased by about 10% or 5%, and the consumption can be reduced by about 1kwh / t. The advantages of using raw meal mill are mainly the clear separation, the over-coarse particles in the finished product are few, which is conducive to firing, and the fineness can be appropriately relaxed. However, the fineness of the raw material is coarser than that of the cement, and the coarse powder is not the strength of the high-efficiency cage powder separator. Therefore, its production and energy saving index is lower than that of cement mill.

Pre-crushing: "More breaking and less grinding" is reasonable from the crushing mechanism. On the one hand, the unit consumption of crushing is much lower than that of ball milling, so the latter has large useless power and low crushing efficiency. On the other hand, after the particle size of the mill is reduced, the steel balls in the ball mill can be greatly reduced, and the small steel balls will reduce the waste of excess energy caused by the crushing of the material. Generally speaking, the specific energy consumption of large balls is high, and the specific energy consumption of small balls is low

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Xinzhong Machinery is a joint-stock enterprise focusing on production machinery, integrating scientific research, production and sales. The company area is located in Zhengzhou Mazhai Economic Development Zone, covering an area of 60,000 square meters, with more than 35,000 square meters of standard workshops, more than 180 main processing equipment, and more than 1,000 online employees. Mainly produces ore powder ball press , hydraulic ball press , briquette ball press , dry powder ball press , desulfurized gypsum ball press , fire-free brick machine , road tile machine , sand making machine , ball mill , Raymond mill , Impact crusher and other products. Welcome new and old customers to visit and guide.

Recommended products: Ball compaction type coal compactor, dry powder compactor, mineral powder compactor, horizontal double shaft mixer, hammer crusher, impact crusher, fluorite powder compactor

Phone: 0371-55951060 Mobile: 18625555675 (WeChat) / 13938414363
Xinzhong Machinery http://bjkrui.com Address: 18 Dongfang Road, Mazhai Economic Development Zone, Erqi District, Zhengzhou City
Briquette briquette machine , dry powder briquette machine , ore powder briquette machine , desulfurized gypsum briquette machine , pulverized coal briquette machine ,

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