Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extraction

Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extraction 2017-04-04T06:57:36+00:00
  • To participate in the 911Metallurgist Forums, be sure to JOINLOGIN
  • Use Add New Topic to ask a New Question/Discussion about Hydrometallurgy.
  • OR Select a Topic that Interests you.
  • Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).
    Using Add Reply allows you to Attach Images or PDF files and provide a more complete input.
  • Use Add Comment = to comment on someone else’s Reply in an already active Topic/Discussion.

Crud Recovery in copper heap leaching (SX unit) (4 replies and 1 comment)

9 months ago
ramine 9 months ago


i working in Crud Recovery in copper SX (solvent extraction) i separate the organic phase by bentonite clay then organic phase separated from crud ... i can load this organic to system ?

9 months ago
David 9 months ago
1 like by Wayne

Typically the crud formed in an SX circuit is literally sucked out of the settlers with vacuum pumps (small portable with hose/wand) and stored in in tanks. Crud forms at the interface of the aqueous/organic and can be seen floating on top of the settlers in the organic phase. In the cruds tanks the aqueous is bled out the bottom (heavier) and the organic is passed thru a clay treatment (bentonite) and the organic returned to process. The whole point of doing this is to return the organic to the process ($$$). Organic losses thru crud and/or to raffinate are the bigger costs of SX although as a unit process the SX represents < 5% of the cost of running a leaching operation.

Use the Social Share Bar on the Left. Tell everyone you can about https://www.911metallurgist.com/metallurgy/ It's FREE & GOOD.

9 months ago

Hello Dear
Thanks a lot of
I doing it and mixed crud with bentonite and wait untill Sedimenting crud and Coming up organic phase and i Stack up organic phase then return to SX unit

9 months ago
Wayne 9 months ago
1 like by David

Hi Ramine,

David took the words out of my mouth :).

The bentonite clay helps remove impurities from your organic, for our small SX circuits we treat a quantity of organic weekly with bentonite to help keep the organic phase in better condition.



8 months ago
kevinextraction 8 months ago

Commonly, we pump polluted organic phase into mixer, stewing and then open the valve on the bottom of the tank, release the entrained aqueous. Then we begin to mix and  adding clay according to our demand and calculation,  5 minutees mixing is enough. Then these mixture are pumped to filter press to press. The crud will be removed. The clean organic phase can be returned to SX unit according to practical need. 

Farhad Baghery
6 months ago
Farhad Baghery 6 months ago

Hi Kevin,

Could you please explain your calculation? how many clays for how much organic?

Please join and login to participate and leave a comment.

BUY Laboratory & Small Plant Process Equipment

We have all the laboratory and plant equipment you need to test or build/operate your plant.

ENTER our Mining Equipment' Store

We Sell EQUIPMENT for all types of Mineral Treatment PROCESSES and Laboratory Testing needs

Have a Mineral Processing QUESTION?

Come in, ask your question

911Metallurgist Community Forums

Talk to other metallurgists and be helped.


We can IMPROVE ALL PLANTS / Mineral Processing Engineering & LABORATORY Ore Testing

911Metallurgy Engineering

Contact us for process engineering, metallurgical investigations, plant optimization, plant troubleshooting, needs. WE “FIX” METALLURGY.