Crushing at Mine Site

Posted in: , on 25. Dec. 2004 - 08:44

We are planning a coal handling plant at mine area. Coal at the rate of 1500 TPH of average 1200 mm size will be unloaded into a hopper. Below the hopper, we want to provide a cursher to crush the coal upto 200-300 mm size so that conventional belt conveyor can convey this coal for subsequent storage and transport.

What type of crusher I should select? What should be the crusher capacity - 2X100% or 3X50% or 4X50%?

D.S. Mallick

Kelly van Rensburg
(not verified)

Re: Crushing At Mine Site

Posted on 2. Dec. 2004 - 04:16

Dear Shri D S Mallick,

Based on a bin capacity of T84,9, to accept the max lump sizes we offer a Apron Feeder c/w Hydraulic Dual Drives, feeding onto a Grizzly Feeder to separate the fines before feeding into a Jaw Crusher - this based on previous installations.

Kelly van Rensburg

Osborn Engineered Products

tel; +27 11 820 7719

Gianluca Bottacin
(not verified)

Re: Crushing At Mine Site

Posted on 3. Dec. 2004 - 04:41

Dear Mr Mallik,

we suggest a Bedeschi doubl roller crusher RI 850/2500 to crush 1500 TPH of coal and to obtain an outlet granulometric size of 0-250/300mm. Only one machine can be utilised.

Best regards

Gianluca Bottacin

glb@bedeschi.it

ph:00 39 0497663100

Re: Crushing At Mine Site

Posted on 25. Dec. 2004 - 06:43

Dear Shri D S Mallick,

You can think of using two roll crusher, such crusher will be able to handle your mentioned input size of coal and should be able to give the output size as required by you. The type of crusher can be as per your choice and preference.

Regarding use of number of crusher units, whether to have 2 x 100% or 3 x 50% or 4 x 50%, the rational method is to see the final cost per tonne of coal crushed, for each of the aforesaid arrangement of crushing capacity. While comparing the cost, one has to see the effect on all other items / equipment. Suppose if you want to have 3 number of crushers, the arrangement in crusher house will be complicated and crusher house size is likely to be bigger than the crusher house for 2 x 100% division. So, you have to consider the structural and civil cost for the crusher house, mechanicals such as vibrating feeder, belt feeder, the flow-dividing hopper, along with the electricals, etc.

Possibly, you will find that the layout and overall cost is less if you have 2 x 100% capacity. One of the important reasons for this is that such crusher capacity directly marches to incoming double conveyors, which are always sized for 2 x 100% capacity. Such one to one flow from conveyor to crusher obviates the serious requirement of flow division and balancing of the flow for the incoming side to the outgoing side.

Regards,

Ishwar G Mulani.

Author of Book : Engineering Science and Application Design for Belt Conveyors.

Advisor / Consultant for Bulk Material Handling System & Issues.

Email : parimul@pn2.vsnl.net.in

Tel.: 0091 (0)20 25882916