Gravity Separation & Concentration Methods

Gravity Separation & Concentration Methods

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How to determine liberation size of Lead slag prior to jigging (3 replies)

M
hadi
5 years ago
hadi 5 years ago

Dear All, Greetings from Iran and glad to be here among professionals.

How to determine metal liberation size prior to jigging of Lead slag with 10% Pb content.

Kindly advise if you have any idea.

A
Alex
5 years ago
Alex 5 years ago
1 like by David

Hi,

you can embed a sample of the slag into resin and polish one side. Then you analyse the polished surface using a microscope. That way you can determine the grain size of the metal phase. Which microscope you can use (e.g. reflected light microscope) depends on the Sizes of the Phases you want to identify.

M
hadi
5 years ago
hadi 5 years ago

Hi Alex, thank u so much for your attention.
I dont get what you mean by embeding the sample into a resin.. kindly advise which kind of resin and if I need to cast one?
I have already analysied the slag using a microscope after crushing, there are metallic pieces ranging from 1 mm to very fine metallic powder.
I am not sure which one is the correct liberation size for my slag.

A
Alex
5 years ago
Alex 5 years ago
2 likes by hadi and David

I guess your method todetect the metallic particles is fine. Since you already detected a wide range of particle sizes (1 mm and powder) it is maybe not the best to talk about the liberation size, because the liberation size should be the size of the smallest metallic particle you`ve detected. Then you must also reduce the particle size of large metallic particles (that are already liberated). If you grind the slag using a rod mill for example, it is maybe better to talk about the time the material is being grinded in the mill. And this you can find out by trying. You can analyse the product after each trial using a microscope. That way you should see how good or bad the metallic particles are liberated.

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