Development History of Vertical Cement Mill

vertimill grinding mill is a collection grinding equipment. of fine grinding, drying, grinding, powder classifier, converying cement.

The world's first vertical mill was made by the Germany Loesche company in the 1920s, after nearly a century of continuous development and improvement, vertical mill production and manufacturing technology has been greatly improved, vertical mill equipment also turn to large-scale unit. The LM63.3 + 3 manufactured by Loesche (Germany) is the largest vertical mill in the world up to now. It has six grinding rollers, with a diameter of 6.3m, Capacity reaches 820t / h. and installed power is 6700KW. At present, the world's major vertical mill manufacturers are: Germany Loesche, the United States Fuller, Japan's Ube, Denmark Smith, the United States Raymond, Mitsubishi Corporation, Germany Humboldt, the United States Aspen - Charles Mo company, the German fee Fei Seoul company. The main vertical mill products are: Japan's Ube manufactured LM vertical mill; Denmark Smith manufactured ATOX vertical mill; the United States Raymond, Mitsubishi, Humboldt, Germany VR VR; American Aspen-Charles Mo company, Germany's Fei Feier company's MPS vertical mill, and so on. vertical cement roller mill has the following advantages：

1. Low energy consumption, high grinding efficiency. According to the principle of non-fully limited bed extrusion crushing, the total energy consumption of vertical mill is lower 20% ~ 30% and the grinding efficiency is 165% than ball mill.
2. Vertical mill covers is small, light weight. Vertical mill is installed power classifier, dust collector which gather gas in the vertical mill. So process is simple, mill layout is copact, construction area and smaller than ball mill.
3. Drying effect is great. Vertical mill uses heated gas to transport materials, vertical mill can dry material within moisture 14%, in other words, vertical mill replace drying equipment.
4. Long life for spare parts. Because the vertical mill principle is the bed material grinding theory, grinds materials reducing the direct wear between the metal, so vertical roller and grinding mill wear and small, long wearing parts.

5. Input size is big. The feed size of the ball mill is generally controlled within 30mm. However, the size of the vertical mill is in the range of 80-120mm, large vertical mill can reach 200mm, and the size of the material increases 3 to 4 times compared to ball mill. It enhances crushing efficiency, simplify the crushing process.
6. Low noise. Sound intensity 1m from the vertical mill is 90dB, which reducing noise pollution.

Because the vertical mill has above advantages, vertical mill owns very important position in economic and social development. Besides, in recently years, vertical mill has been greatly promoted in the cement industry, and play an important role in saving energy and promote the cement industry and technological progress.