Grinding & Classification Circuits

Grinding & Classification Circuits2018-06-17T09:51:34-04:00
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typical hydrocyclone feed pressures (4 replies)

11 months ago
eeihs 11 months ago

Hi, I'm a M.Eng student (control systems) and have the following question relating to hydrocyclones classifier in a mining communication circuit:

What is the typical upper and lower pressure limits (in psi) for a hydrocyclone, lets say a 40 " / 1 m hydrocyclone as found real life/ real operations.

I'm guessing 35 to 75 psi but have no idea if this in any manner a realistic pressure range.

Thank you.


11 months ago
ocastrosoto 11 months ago

Dear Helmut

Typically hydrocyclone are  prepared to support up to 150 psi (water hammer) , nevertheless from an operational point of view they operate between 6 to 30 psi.

Nevertheless, those limits are rough estimates, because in reality, pressure controls cut size and it must be kept constant if possible or in a narrow range.

11 months ago
eeihs 11 months ago

Dear Ocastrosoto,

Thank you kindly, most appreciated.

Now I have a ballpark range to work on. I do understand that the pressure needs to be kept constant.



11 months ago
SmartDog 11 months ago

You might this useful and the spreadsheet it links to.

11 months ago
RodC 11 months ago

Guys, HC design is an interesting subject and is a balance of pressure (means pump power consumption), cost of the clones, and the separations needed.  Remember the HC output may go to another device so keep that in mind to ensure the entire system is optimized.

A smaller HC can be run at higher pressures (pressure drop), but now the feed pump gets expensive and so on.  Define what you would like from the process in terms of cut, then run HC sizing simulations to confirm the best approach.  HC vendors routinely run these calcs, but they may keep the calc details confidential.

Also be aware the orifices will wear over time and should me maintained, or converse check the feed routinely to see if the PSD etc has changed and a better orifice size is required, and perhaps save some pumping cost.


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