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Technical Cement Forum / kiln bag house dust quality check?

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Raju Verma 06/08/2013 16:48:32

kiln bag house dust quality check?

dear expert

in terms of good quality control can you please give your opinion which option is more accurate and why.

1.) Option-1 After raw meal we have autosampler for sample collection. And kiln bag house dust mix with raw meal after this autosampler and directly go to silo. And finally only basis of raw meal quality we take corrections.(means bag house dust not part of the raw meal sample)

2.) Option-2 After raw meal we have autosampler for sample collection and kiln bag house dust mix with raw meal and than raw meal sample get collected and test accordingly correction has taken.(means bag house dust part of the raw meal sample)

please comment which option is standard and why

thanks

regards

raju verma

N Jaye 07/08/2013 22:46:48

Dust must go to kiln feed and not to the silo.

It you have no choice send the dust before the autosample and try to keep the raw mill runing

As long as possible.

Ted Krapkat 08/08/2013 05:33:17

Hello Raju,

Each of the two options has a disadvantage, however Option one is the best of the two options shown.

If added to the raw meal, kiln dust makes it very hard to determine if quality fluctuations in the raw meal sample are due to poor raw mill quality control or kiln dust variations.

However if the kiln dust is added to the silo, under certain conditions it can cause undesired fluctuations in the kiln feed chemistry. It is therefore better to add the dust directly to the mixing bin beneath the silo so that it bypasses the silo, as yndiaye has already suggested.

As a matter of interest, what do you do with the conditioning tower dust? Or is the kiln baghouse dust a combination of raw mill baghouse + conditioning tower dust?

Regards,

Ted.

Raju Verma 08/08/2013 07:09:03

thanks

ted and yandiaye

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