chari
79 posts
TimePosted 23/02/2008 14:29:54
chari says

Residue of cement in open circuit mill

We have a cement mill,2.4m dia 7.9m length with 3 comp. The residue in 90 microns is always fluctuate from 3 to 7 % for same feed rate and same composition and same air vent quantity. What may be the reason.?

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Michael Clark
312 posts
TimePosted 24/02/2008 18:30:59

Re: Residue of cement in open circuit mill

There could be a number of reasons: (i) changes in grindability of the clinker, or (ii) variation in the condition of the internal diaphrams between the chambers of the mill with regard to build-up. Have you inspected the mill internally?

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chari
79 posts
TimePosted 29/02/2008 16:25:47
chari says

Re: Residue of cement in open circuit mill

we have inspected the mill but no build up, nor the diaphrams broken.The clinker composition is also same .only difference from earlier readings is air quantity of exhaust earlier 15000m3/hr,now 12000m3/hrs

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Michael Clark
312 posts
TimePosted 03/03/2008 15:05:27

Re: Residue of cement in open circuit mill

Air flow rate will affect residue as fines will be stripped off the charge in the mill before they have time to be ground.

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