Gravity Separation & Concentration Methods

Gravity Separation & Concentration Methods2017-04-04T06:57:23-04:00
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Knelson 7.5 with vibrating screen (2 replies)

10 months ago
Raulacun 10 months ago

I have a Knelson 7.5 with vibrating screen. Someone stole the electric motors of the concentrator and the screen. To replace them locally, I need to know the rpm of the motor and the diameter of the original pulley, here we use 110/220 V 60 hz monofasic.
Can anyone help me with this information?

Note : I wrote to Knelson Concentrators  but never got a response

C. Arnold
10 months ago
C. Arnold 10 months ago

Hi Raul,

Sorry to hear that you didn't get a response from Knelson. 

I would imagine this MD7.5 would be fixed speed, and therefore RPM will be standard to 60hz motor.  The concentrator should be 3/4Hp and screen 1/3Hp.  I have sent a request for a Private Message, so I can send you contact info to help with the rest of your questions. 

10 months ago

Good morning Raul.

Chris' answer is correct. You should only know that the cone should rotate at 400 RPM.

Commercially the 3 / 4HP engine can be purchased at 1750 RPM. I do not remember the diameter of the pulleys, but I imagine that you have the driven pulley (larger pulley) with which the calculation of the driving pulley (smaller pulley) can be calculated with the following formula:

DxN1 = dxN2


D: Larger pulley diameter

d: Minor pulley diameter

N1: RPM greater pulley

N2: RPM lower pulley

Receives a warm greeting.

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