Transfer Point
In regard to your question, we used long covered chutes at right angles anywhere we had a transfer and we never had a problem except when certain idiots left the conveyor belt control on manual and buried the tranfer points
By covering the chute over the out bound belt it stoped the run of mine ore from bouncing all over and it stayed on the belt.
lzaharis ■
Re: Optimal Material Transfer To High Speed Belt
Dear Kam,
Besides Palabora there is Los Pelambres, Chile, operating at 6m/s transporting 8700 t/h of primary crusher copper ore. Belt feeder chutes under the stockpile feed onto three downhill belts connected by oblique angles. This has been running since 2000.
All the chutes are designed by the principle of curved spoons. Los Pelambres has a rock box upper chamber which feeds onto the curved spoon.
I have referenced curved hood and spoons in copper,iron ore, bauxite, linestone and coal. Collahuasi, Chile operating at 8000 to 10000 t/h design tonnage. It has the curved spoon concept at the stockpile reclaim belt feeders and on the belt to belt transfers. Collahuasi transports primary crushed copper ore with belt speeds from 5 to 6 m/s. ■
Re: Optimal Material Transfer To High Speed Belt
Engineering Services and Supply in Australia may be able to help with the dsign of this type of chute. Please contact Terry Hand at 61-7-55981077 ■
Re: Optimal Material Transfer To High Speed Belt
Kam
There are papers on-line. Look up ckit, check the archives of this forum or just hit google.
With regard to your request for suggesitons, I would recommend a good chute over putting in another conveyor. The level of maintenance on the chute will be far less than maintenance on the extra convyor and chute. Do a quick full life costing comparison.
The limiting factor on the chute will be height. Conservation of energy and so forth dictates that if you are going to get your particle velocity up, you need to let gravity do its thing before you use the chute to give it some horizontal velocity. I've assumed your feeder is delivering at a very low velocity.
I would also recommend that you get an experienced chute person looking over your shoulder. There is so much that can go wrong. Chutes are a science (some would say art) within themselves. The quantity of text on the subject within this forum is testimony.
Imortantly, I would also recommend that you get to site and spend some time getting to know transfers handling similar material. ■
Transfer Chute Design
Kam,
A favorite topic of many. The answer to your question is yes it has been done in Australia, in fact before it was done at Palabora. It depends a lot on the transfer angle, belt to belt height and material size. Speed is a major factor if the height differential is high as it has an enormous influence on liner wear. We have been designing transfers for 15 years and if you want assistance email me details of the application and I can let you know the possible alternatives from modified rock box through to a soft loading chute of the Palabora concept.
Col Benjamin
Gulf Conveyor Systems
colin.benjamin@gcsm.com.au ■
Re: Optimal Material Transfer To High Speed Belt
Kam,
CDI has also designed iron ore and bauxite hood and spoon designs in Australia for Rio Tinto, BHP Billiton and Comalco.
These handle jaw crushed open pit rock. Some times the rock can get to a respectable size as a clay lump. It does not have the heavy duty, large rock size, of a gyratory crusher with copper rock having a high Bond index > 12. ■
Optimal material transfer to high speed belt
Greetings all,
Looking for suggestions/papers/examples of methods to reduce belt wear at the transfer between a low speed feeder and high speed overland conveyor system (5.5 m/s, 6500 tph, primary crushed hard rock). Current design uses a conventional rock-box style chute. Have seen the Palabora curved chute example - have any other such chutes been implemented with success?
We are also considering the option of an intermediate accelerating conveyor, allowing us to utilise a low level inline transfer to feed the OLC (something I have never encountered before). Does anyone have experience with possible chute designs to suit such an application?
Regards,
Kam ■