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Technical Cement Forum / Use of TDF with steel wires and problems of kiln operation associated with it

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asim 27/01/2011 07:02:03

Use of TDF with steel wires and problems of kiln operation associated with it

Dear All,

I would like to share a very interesting phenomenon associated with TDF with steel wires to be fed in PC as alternative fuels. We are feeding tyres at the lower priphery of PC. Generally at that point we dont have any problem except the wires in tyres which are being settled in the connecting duct in the form of tuft and then fallen down into the cyclones specially in lower cyclone and block the cone. some time during kiln upset, these tuft travel even down to the cooler and blocked cooler crusher.

1-Have somebody the experience of using steel embedded tyres and to tell us the remedial action to avoid such kiln stoppage.?

2- could someone tell us the shredder machines which can remove steel wires from the tyres to avoid such problem.

Regards

ASIM

Ted Krapkat 28/01/2011 04:37:10

Hello Asim,

Most commercially available tyre "shredders" suitable for the Cement Industry are really tyre chippers rather than shredders... and they don't remove the wires, they simply cut them into smaller pieces.

Good quality tyre chippers cut the steel in the tyres cleanly, so that the chips have little or no steel wire that is exposed past the edge of the cut. If the exposed wire is more than a couple of mm long, the tyre chips catch on each other and the chips clump together.

Chipping is really a method to control the handling/storage/feeding of the chips being delivered the kiln. However, because the wire lengths are much smaller once the rubber has burned away, there is also far less chance of the wires clumping within the kiln.

If you purchase a tyre chipper make sure you get a guarantee from the supplier regarding the maximum exposed wire length of the chipped tyre product.

Regards,

Ted.

asim 29/01/2011 03:42:59

Dear Ted,

Thank you very much for your reply and suggestion. Could you pl advise us the company name or manufacturer of the tyre chipper.

Regards

Asim

Ted Krapkat 31/01/2011 03:02:27

Hello Asim,

You can research potential suppliers by doing a Google search or posting a message on the Cement Trading Forum;-

http://www.cemnet.com/forum/default.aspx?fid=8

Best regards,

Ted.

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