Grinding & Classification Circuits

Grinding & Classification Circuits

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cement grinding ball mill cooling system (3 replies and 3 comments)

m
moayyad
6 years ago
moayyad 6 years ago

i want to know we have ball mill for cement grinding the cooling water for mill bearing inter and exit in the same reading or higher in just one degree is these normal or we have problem and if we have problem what is the cause and the solution for that case     

W
Wayne
6 years ago
Wayne 6 years ago
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Hi Moayyad,

The temperature can be controlled by water flow only to a certain extent, depending on the heat transfer capabilities of your heat exchanger.

If you have your water running faster than the heat transfer can use the temperature will not change, it is already doing as much as it can and the temperature does not seem to change as it is spread out over a large volume. 

I think your situation sounds normal if it has always behaved that way.

One way to cool it more would be by putting a greater capacity heat exchanger.

Cheers,

Wayne

m
moayyad
6 years ago
moayyad 6 years ago
Like

Thank you for your time but we have problem with this it's our mill disconnect because of high temperature spacialy for the exit temperature of the mill from my opinion there is no heat exchange between water and shoe bearing or its too small 

H
hamza khalifa
6 years ago

Hi Moayyad
Most propably your mill bearing exit temp meter is defective . Change the meter and run the mill again . If new meter shows expected higher temp than inlet then it is ok . If mill trips again because of exit temp exceeding permissible limit , the check water pump delivering water to bearing , if ok then check bearing surface itself.

m
moayyad
6 years ago

I use portable temp sensors installed one used to give shoe bearing temp only and water pump works normally

Mike
6 years ago
Mike 6 years ago
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1 like by David

You basic question is a little unclear.  If the the water entering the shoe and exiting the shoe are within a degree of each other this would indicate that you have more water flow then you need, but it should be adequate. But your follow on seems to indicate that you are having a temperature issue with your bearings.  If thiss is the issue then you are probably not getting good water flow in the bearing shoe and yes you have a problem.  To truly give meaningful answers the following is need water temperature in and out, bearing temperature.

m
moayyad
6 years ago

Water temperature in is almost 27 degree and the output temperature is almost 28 or 29 degree and bearing temperature up to 70 degree celcus

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