Tower Mill-New Approaches to Improve Dry Milling Operations
The last few years have shown a significant increase in the demands for fine products, which means everything under 10μm. There are more and more applications requesting extremely free ground powders leading to the development of several milling machines which are better adapted to the new products. Cost saving machinery is important for the worldwide competition. Especially the energy consumption is extremely important for any fine ground product.A worthwhile field for mechanical engineering companies is the dry milling machinery as there are not as many solutions available compared with wet milling applications. In many cases wet milling is the only solution to reach the requested quality, but there are also a lot of applications which can be performed in a dry way on the premise that the right mill and classifier are available.Dry milling permits to save energy and allows to influence the particle size distribution more easily,as a classifier can be used in that case. This will significantly reduce production costs and can enable the production of new products with better properties.The Tower Mill is well-known already in the field of wet grinding. Recent research work and end user reports have shown clearly that this mill has a lot of advantages compared to a ball mill. Up to now this advantage is limited to wet grinding as only few mills have been used for dry grinding.There is no doubt about the efficiency of dry grinding, but new and improved feeding and discharging systems have to be developed in order to enable the full range of its advantages. Especially the high production capacities are a challenge for mill and classifier designers.The Tower Mill with its special grinding mechanism allows to cope with very high feed rates,because machines with more than 1 MW are available. Improved grinding efficiency will decrease the circulation load through the classifier and also lead to smaller classifier sizes. Together with improved mills the classifier can work more efficiently because the feed material is finer.Results of a test center plant production will be shown together with a comparison between standard machinery and the MaxxMill(R). Preferential applications for each mill will be explained.
Tower mill Ball mill Dry grinding Fine grinding Energy consumption Milling plant
J. Sachweh S. Gerl
Maschinenfabrik Gustav Eirich GmbH & Co. KG, Hardheim, Germany
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
427-435
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）