Grinding & Classification Circuits

Grinding & Classification Circuits 2017-04-04T06:57:16+00:00
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Grinding Roller as grinding media (1 reply and 2 comments)

8 months ago
Venkatesh 8 months ago

Propose to employ free floating grinding roller instead of balls or rods in a ball mill. Can we run the mill at 150 to 200 percent critical speed? How to assess the mill drive power in this case? Any formula? Air flow through the mill can be up to 4 m/sec . The product can be either air swept or peripheral discharge. Dry grinding.  Pl clarify. Thanks

Alex Doll
8 months ago
Alex Doll 8 months ago

I can't picture what you are proposing to do.  Can you give a reference to the type of equipment you are describing? 

Regarding the mill power, all of the ball mill power models I am aware of are empirical or semi-empirical.  Operating above 100% of critical speed will certainly violate the range of validity of these empirical models, so you will need to do your own power measurements and report back to us what you found.  Then we can try curve-fitting your results to extend existing models into the range you are describing.

8 months ago

Mechanically, it is a dry grinding rod mill overflow trunnion discharge type. However, grinding rods are replaced by equivalent weight grinding roller.

4 months ago

If you're interested in a mill similar to that, I would contact Amoref from South Africa. Their rod mill follows a similar idea of a couple large rods/rollers in a smooth lined rod mill.

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