CIP Leach Tanks sanding up - Hydrometallurgy: Leaching in Heap, Vat, CIL, CIP, Merrill–Crowe, SX Solvent Extraction - Metallurgist & Mineral Processing Engineer

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CIP Leach Tanks sanding up (4 replies and 3 comments)

nagokumbirai@yahoo.co.uk

6 years ago

Am running a CIP plant regrinding a dump from stamp mills. Ores that make up the dump are from various areas, challenge is continuous settling of my leach tanks. How can I solve the problem of tank situation?

Alex Spynu

6 years ago

Alex Spynu 6 years ago

What is your sieve analysis of solid in the pulp. Maybe there are many coarse fraction.

How effective is your stirring?

Do you have aeration in your tanks?

nagokumbirai@yahoo.co.uk

6 years ago

Sieve analysis average has been 70% passing 75micron screen. Aeration using 1inch pipes is already in use. On stirring will give attention to that,thank you

Makopa29

6 years ago

Try to grind further to around 82-85% passing 75 micron.at 70% passing 75 micron you have to much coarse material and it will settle in your tanls

Makopa29

6 years ago

Your aeration does not have a problem what type of agitators are you using?

Bob Mathias

6 years ago

Bob Mathias 6 years ago

If the tanks are sanding up, this tells me you are not regrinding sufficiently prior to leaching.

Makopa29

6 years ago

Makopa29 6 years ago

Hie Kumbie,

the biggest issues is your grinds.your grinds are not efficient.revisit your grinding efficiency and you will solve your tank continuous settling.

Todd H

6 years ago

Todd H 6 years ago

Your top size that is the most likely issue. 70% passing 75um should be fine enough but it does not tell the story about the top fraction. Do you have a screen analysis?

It is possible that you tanks are not properly designed for the slurry being treated - relative density, top size, air. Adding air to a tank can improve the agitation but it can also disrupt the agitation, the air can enter into the agitation zone and reduce the stirring efficiency.

Do you tanks have baffles?

The only quick thing you can do is to change your grind (if that is the problem) or to reduce your solids percentage in the tanks (this may or may not help).

Todd Harvey - Global Resource Engineering http://www.global-resource-eng.com

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