https://forum.bulk-online.com/showth...n-trough-beltsshowthread.php?28944 Vertical and horizontal curves in trough belts

Hope above link is relevant to your query.

Regards, ■

Overland conveyor curvature is often confused by pre-FEED ignorance and reticence. Read some of the posts in these forums and you will notice the reluctance of curvature exponents to commit to analyses.

Ignorance: In KSA I discovered where an original tube belt was substituted by a troughed belt without regard for curvature change. Nobody could tell me the reasons for the tighter bends. My own detective work revealed that Kinder Morgan had advised Technip Roma that pet coke could be carried on troughed belt rather than the more expensive tube belt. The FEED was changed accordingly, without even examining the curvature implications, and when the Main Contractor, another clown, was advised by his knowledgeable sub-Contractor that the thing wouldn't fit in the designated corridor it was too late. Technip had got paid for a silly FEED and walked off the job. How's that for confusion?

Reticence: In another job the FEED, dare I mention Technip again, had been prepared where the overland conveyor carried ore downhill and waste was carried back along the same route by trucks. The Client was immersed in mining failure and refused to accept that the more plentiful waste should be carried on the otherwise empty strand of the overland. The Client hastily cooked up a scheme to discredit the proposal on the basis of more expensive cut and fill requirements. Slight deviations to the topography could have reduced the civil work: both for the bi-directional proposal and even the original FEED works.

The simple answer is to get someone who knows what he's doing: no more, no less. If the mathematics are right the job has a chance. ■

Hi Roland,

Yes. This was green coke extracted by water jet cutting but it was still pretty warm and aromatic. I would have thought that the application was well suited to SSCC's because the material could be fed directly onto a store-bound conveyor without the need for such a large soaking pit. Whatever: submerged scraper chain conveyors are universal for power station bottom ash disposal and the pet coke duty is amazingly similar.

What has this got to do with curvature? ■