planning to put up a new cement grinding plant using Vertical Roller Mill 300-350 TPH and before implementing the project, we would like to gather as much information regarding the actual operation of this mill during cement grinding and the quality of the product in terms of the fineness/particle size distribution and how does it compare with the product of a ball mill relative to these parameters.
During the period of development from 1930 to date, cement mills have increased in size and drive power, in response to an increase in fineness of cement, an increase in the hardness of clinker, and a desire to operate a smaller number of grinding units.
Re: How Can I calculate new ball size and weight desing for ball mill. Hi, We have a similar mill. Pregrinding with hammer crusher and mono-chamber mill. Thisis what a proposed based on literture review i did and others agree its more and less correct. But remember it all depends on your mill feed size after pregrinding.
Cement mill notebook. The first mill compartment, where grinding is performed by impact alone should contain balls of 100 - 60 mm diameter. The second mill compartment, where comminution is performed by impact and friction mostly by friction should be charged with balls of 60 - 15 mm diameter.
For this purpose, cement grinding circuit data including the operational and design parameters were collected from 14 industrial ball mills, ranging in diameters from 3.2 to 4.8 m. The
The OK Mill was originally designed for cement grinding. In 2017 we released the OK vertical roller mill for materials grinding. The OK Mill’s modular design comes with unique flexibility, showcasing parts commonality, where spare parts can be shared between vertical roller mills regardless of size and application.
Material is directly conveyed to the silos silos are the large storage tanks of cement from the grinding mills. Further, it is packed to about 20-40 kg bags. Only a small percent of cement is packed in the bags only for those customers whom need is very small.
However, the unit cost for wear parts for a ball mill is much lower than for a vertical roller mill. For a ball mill grinding OPC to a fineness of 3200 to 3600 cm2/g Blaine the cost of wear parts ball, liners and mill internals is typically 0.15-0.20 EUR per ton of cement.
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CEMENT INDUSTRY Cement Mill Notebook QATAR NATIONAL CEMENT COMPANY DOHA-QATAR 2010 na2elll yahoo.com This confirms the theory that the size of grinding media should be adjusted to the fineness of the product, or in other words; the smaller the product, the smaller the grinding media. Figure: Classifying liners
A 1.5 mio t/a cement plant is having a closed circuit ball mill for cement grinding: The mill has been operating with satisfactory performance in-terms of system availability and output, however power consumption was on higher side. 3.1 System Description Mill Rated capacity 150 t/h OPC at 2800 blaine I chamber liners