Hi,

the difference should be quite easy:

a non slew able stacker has non of the following equipment:

- slew bearing with gear rim

- slew drives (mostely 2 of them)

- complicated flange structures (which must be machined)

the following makes the design of a non-slewing stacker easier:

- tripper car hight can be reduced and you don't have to consider slewing mechanism of the boom

- complete machine weight can be reduced

- ... ■

Thanks,

That was more or less the conclusion that I reached, but it is good to have some confirmation.

Jac. ■

The price difference between slewing with luffing type stacker and only luffing type stacker is about 20%. I

K.S.NALWAYA

Managing Director, ■

my earlier reply was half reply,

The cost difference between two is 20%. if need be i can send you the offer for stacker & reclaimer , the type , you are looking for.

Regards,

K.S.NALWAYA

Managing Director,

KSN Tech Ventures Pvt. Ltd.,

NEW -Delhi-India

Cell: 91 9811255464

Tel: 91 11 26162532/33/34

Fax: 91 11 26162533

E-Mail: ksnventures@gmail.com

nalwaya@ksnventures.com ■

Originally Posted by shibajidasgupta

Hi,

Slew Stacker would be used if you are stacking on both sides of the track. If this is true, the alternative is a Twin Booom Stacker.

A twin Boom Stacker is about 15% cheaper than the Slewing Boom Stacker.

Shibaji

Hi shibajidasgupta,

that's actually not the hole truth, of course this is correct that you can make two stockpiles with a slewing stacker but you also have to consider the stacking methods:

with a boom (luffing and) non slewing stacker you can perform the following stacking methods:

- chevron stacking

- cone shell

with a boom luffing and slewing stacker you can perform the following stacking methods:

- chevron stacking

- cone shell

- windrow

- combinations /modifications of all kind of stacking methods (ie. combination of chevron and windrow, starting point of chevron not in the middle ...)

if you have to design a stockpile the stacking methods are quite important (i.e. for the steel industry you need to have a very homogeneus stockpile).

With a non slewing stacker you can never create such a homogeneus stockpile like with a slewing stacker.

If ha homogeneus stockpile is not required there's nothing against a non slewing stacker.

I have to say that I've never had to do something with twin boom stackers, but I don't believe that they are so much cheaper than slewing stackers:

- higher tripper car because you need a chute where it's possible to seperate the material volume (if one stockpile is fully reclaimed and the other not)

- therefore you have to design both booms / boom conveyors with the same capacity as the tripper car.

- you need two luffing arrangements (winch or hydraulic cylinders)

- generally you have two booms instead of one so you have more weight which increases the wheel loads, heavier structures are required, etc.

I'm not convinced that they are cheaper, but I never had to do something with those twin boom type stackers... I might be wrong ■

It all depends on the design parameters of our radial stacker. A minimum requirement will add another 40% for an improvised carriage for radial traversing and strong pivot at the tail end both combined enables smooth radial traversing.

Regards

MSNamboo ■

Hi Jac,

forum members have answered your question already; luffing boom stacker would cost 15-20% cheaper. If you need a solution for a competitive price to your client you may contact us.

Originally Posted by Jacdeb6009

Hi there,

Does anyone have an idea regarding the cost difference between a luffing boom stacker and a luffing and slewing boom stacker?

A "percentage" difference would be adequate. I am looking at a 1,200 tph stacker for a coal stockyard. The client is looking to save some money and wants to know more or less what the difference in costs would be.

The design of the yard is not really suited to a slewing machine, but this was originally specified.

Any help would be appreciated.

Jac.

■

Hi Jac,

The percentage difference would be approximately 5% of the overall cost, the only difference would be the removal of the wheels and radial wheel drive, however, to ensure maximum flexibility we would recommend the inclusion of this radial option as the unit would be used for other applications in the future. Also, with the telescopic action in our conveyors, we can extend to max 50 metres and retract the conveyor to 30 metres or less, which ensures storage is easy. Please review our website www.telestack.com or email me carl@telestack.com for more information.

Hope we can help with your enquiry, thanks and talk soon.

Carl Donnelly

Sales and Marketing Executive

Telestack Limited

T: +44 (0) 28 8225 1100

M: +44 (0) 7859009239

F: +44 (0) 28 8225 2211

E: carl@telestack.com

W: www.telestack.com ■