Oppsite classification of grinding media

Hello,

We have got a strange phenomenan in one of our cement ball mill second compartment ... in checking we have observed that the grinding media had sorted and classified oppositely inside the second compartment as the following: 25 mm (near intermediate diaphragm), 30 mm, 40 mm and finaly 50 mm (near mill out let diaphragm).  How can grinding media be classified like this? Is there any reason for such phenomenan?? Mill is running now with low capacity and low blaine and don't know how to deal with it.

Regards   

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re Oppsite classification of grinding media

Hello David,

You can get reverse classification if your ball loading volume is too high, especially with low friction classifying liners.

Regards,

Ted.

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re Oppsite classification of grinding media

Hello David,

             Reverse classification may occur in ball mill.

                      If your  grinding media wear rate is high and p.wt of chamber is too low.

                      It is indicate by mill frequently chocking problem.

                      If your mill is going to chocking  condition, mill o/l blain low , Main drive KW                                too much variation ( lower side to normal )

                     Classifying linears at starting worn out

                     Pl send your operating data on my Mail id  girish_1966@yahoo.in

                     With regards

                     Gks

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