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31/01/2017 Vertical Roller Mills for Coal GrindingIndustrial Efficiency . Vertical roller mills VRM can replace ball mills or tube mills used for Installation costs of $14 million 1US$=110¥ are reported for a 200 t/h capacity plant in Installation costs between $4 million for 30 tph capacity and $8 million for 100
1/04/2013 Our grinding mill including fine powder grinding mill and coarse powder grinding mill. The fineness of final powder are between 50 to 3000 mesh, which can meet customers different requirement. The fineness of final powder are between 50 to 3000 mesh, which can meet customers different requirement.
Vertical roller mills (VRM) can replace ball mills or tube mills used for preparing coal. Today VRMs with capacities up to 50 tph are the dominant technology for coal grinding. According to MIIT, grinding media wear in a VRM will only be 5 to 10 g/ton of coal powder, as compared to 100 g/ton of coal powder in a ball mill.
Both overflow and diaphragm (grate) ball mills have been used as single stage grinding units. If the feed to such a system can be top size limited, for example by the use of closed circuit crushing, this type of installation can prove to be the most efficient from both the capital and operating standpoint.