What will the hopper feed? Conveyor? rail car? truck?

I am assuming a conveyor since you posted in Trough Belt Conveying section. But you need to answer before you can get a reasonable reply. A 7000 TPH system is going to be quite large for a mobile application. ■

Originally Posted by bbsokawukile

Greetings,

I need to design a mobile hopper,

Material: Iron Ore

Tonnage: 7000thp (design)

Particle size: 25mm

Feed type: Reclaimer

We are considering a diesel engine as a source of power.

We want to make it as short as possible

Has anyone ever done this before if yes what

are the critical aspects that we need to consider

as far as this design is concerned.

Regards

As my friend Gary has so kindly mentioned the mobile hopper will be very

very large in square area-square meter foot print.

The iron ore may weigh up to 3,217.7, pounds per cubic meter so your dealing with

11,262 tons per hour of material a hopper of this size will need multiple track drives

for its operation and placement.

Track drives of this size are made for bucket wheel excavators and large drag lines and

the spacecraft transport platform at Cape Canaveral which moves assembled spacecraft from

the spacecraft assembly building to the launch pads there. The crawler carrier there transports

the assembled spacecraft at one mile per hour to the launch pads and back empty at the same speed.

The problem is size and volume if you intend or desire to have a mobile platform.

Your question raises more questions than answers as the area it is to be used in is a major issue as

your operating area hase to have the strengh in materials to support the eleven thousand tons of

iron ore AND the weight of the constructed hopper and its structural support bracing, track drives,

power unit, fuel storage and control sheds.

The track drives are typically all electric or electric over hydraulic and that will require a very large power

load of 4,000 plus volts for the drive units.

Help us to help us help you with this issue. You have not given us enough material to even begin realistically

examining your inquiry as we need to know much more than what little you have given us ■

Originally Posted by Gary Blenkhorn

What will the hopper feed? Conveyor? rail car? truck?

I am assuming a conveyor since you posted in Trough Belt Conveying section. But you need to answer before you can get a reasonable reply. A 7000 TPH system is going to be quite large for a mobile application.

Rpply-

I have worked with Rail mounted Mobile hopper cars of capacity 3000TPH Iron Ore,which had a vibrating feeder, feeding ore to the conveyor.The reclaimer was feeding the hopper car.The hopper travel was with electric motor& gear box.

Can you please give the application details like this. Feeding arrangements and costing time of feeding conveyors etc are required.

Rgds,

Narayanan Nalinakshan. ■

Anyone conveyor/structural/mechanical expert can design this for you as long as the operating parameters are well understood.

Some important things come to mind:

1. The transfer car will require an impact table that lifts the yard belt off of its idlers as they will not be selected and spaced for the impact load

2. The impact table should be made of, closely spaced, 5-roll garland idlers

3. The impact table must be profiled to pick up the belt from the yard belt idlers and lay it back down on the yard belt idlers without locally over-stressing, relaxing or pinching the belt (at the idlers junctures)

4. The chute profiling must ensure good material flow without stagnation or excessive acceleration. the material flow must be directed in the direction of the outgoing yard belt

5. The chutework must be adequately line according to the wear requirements of the material flow

6. The supporting structure and travel gear must be properly sized for the load and duty

7. The number of driven wheels must be selected, according to load variations, to ensure that wheel to rail traction is sufficient for the travel resistances

8. The travel drives must be sufficient to develop the required tractive effort

Other issues will be revealed and addressed during the design.

Joe Dos Santos ■

We have supplied a number of such mobile hoppers in various ports. Kindly contact us further; info@scorpioengg.com

We are currently supplying such a hopper to a port in the USA

Thanks

Originally Posted by bbsokawukile

Greetings,

I need to design a mobile hopper,

Material: Iron Ore

Tonnage: 7000thp (design)

Particle size: 25mm

Feed type: Reclaimer

We are considering a diesel engine as a source of power.

We want to make it as short as possible

Has anyone ever done this before if yes what are the critical aspects that we need to consider as far as this design is concerned.

Regards

■