Belt Feeder Design & Multi-Feed Pt. Flow
Dear Derek,
CDI has designed conveyors where the loading points are remote to one another. For remote loading points, we do not extend the skirts between stations. We practice concentrating and centralizing the ore at each station to minimize ore that will contaminate the belt's edge regarding the downstream skirt system.
For each downstream skirts system, we have devised special edge cleaning equipment to keep the downstream skirt clear from being impacted with the up stream material.
There are caveats and conditions where this may not be feasible.
There are many installations which have installed mechanized removable skirts when there are many feed points but the conveyor has only one feed point at a time.
The highest speed >6.5 m/s with multi-feed points.
The largest lump >250 mm with momentary sized to 500 mm with multi-feed points.
I note your belt feeder arrangement and suggest you reverse the second feeder orientation to reduce the potential connecting skirts.
Do you need help with the belt feeder design and its skirts? CDI has designed belt feeders with new and improved chute geometries, spile bar arrangements, with continuous belt loop change-out arrangements. The new geometry better reclaims flow within the floor slot, produces better mass flow (if required), minimizes power, and most important belt wear. ■
Re: Are Skirts Needed
Larry,
Thanks for your response. I will keep CDI in mind should we require your expertise. ■
Re: Are Skirts Needed
Incidentally Derek..
I have had quite a lot of success using two types of intermediate loading point arrangements.
One does not have skirts, but uses a long but quite narrow slot, as opposed to a loading spoon type chute. This has two long vertical parallel plates which extend down to nearly touch the upstream material, and you feed between them. (My Dual Carry Conveyor is fed all over the place and uses this type of feed).
The other is a normal (but elevated) feed chute but with skirts. These skirts are local to the feed point only, but have a long tapering lead-in from the width of the belt to 2/3rds belt width.
Cheers
LSL Tekpro ■
Are skirts needed
The tail end of a conveyor runs under a stockpile. Two feeders under the stockpile load materal onto the belt. The conveyor discharges into secondary crushing feed bins. Screens discharge oversize from the secondary crushed ore about half way along the belt.
The total flow is 5000 tph (metric). The oversize recycle flow is about 25 % of the total flow. Ore density is around 2200 kg/m3. Maximum lump size is 165 x 250 x 250.
Would you normally skirt the full length from the stockpile feeders to the loading zone for the secondary crushed ore screen oversize?
Any suggestions on other methods to limit damage due to material running into the back of the screen oversize loading chutes?
(BTW, just read the thread title again and if there was any doubt the reference to 'skirts' was used in the context of conveyors.)
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