svl
5 posts
TimePosted 23/09/2011 15:25:12
svl says

Ring and boulders formation

Dear experts,

we are maintaning A/F ratio from 1.8 to 2.2. it is difficult for us to bring down  ratio with avialable additive meterials. we are continiously facing problem of ring and boulders formation. Is high A/F ratio is cause for all these problems or SM is 2,0 to 2. 30. your advice is highly appriciable.

 

Shonti 

 

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Ted Krapkat
536 posts
TimePosted 27/09/2011 00:22:01

Re: Ring and boulders formation

Hello Shonti,

Yes, your A/F ratio is towards the high end of the normal range for A/F (1.3 - 2.5) while your SM is near the low end of its normal range (2 - 3).  This means that you tend to have a lot of liquid phase with a high viscosity.

This situation could cause excessively thick coating in certain places and subsequent clinker ball formation.

If it is at all possible, I suggest that you try to either reduce your AM or increase your SM, or preferably both.

 

Regards,

Ted.

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svl
5 posts
TimePosted 28/09/2011 14:17:43
svl says

Re: Ring and boulders formation

Thank you Mr. Ted, is it the same reason for frequent lining failures. lining failure rate is high. your advice helps me lot.

Kind Regards

 

Shonti  

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Ted Krapkat
536 posts
TimePosted 29/09/2011 03:04:18

Re: Ring and boulders formation

Hello Shonti,

Yes, any abnormal coating or ring formation will increase the chances of brick failure. Do you have much coating or ring material falling away and coming out through the kiln? Sometimes you can notice this as oversize lumps of irregular shape in the clinker as it comes out of the cooler.

Sometimes, depending on the location of the ring/excessive coating you can also notice it in a sudden unexplained increase in MgO in the clinker analyses. (due to the loss of  magnesia brick)

Regards,

Ted.

 

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