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

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

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What the effect of the residence time on the leaching process tanks for potassium chloride (3 replies)

8 months ago
CharlieAlAfensh 8 months ago

There is a solution that contains sodium chloride and potassium chloride, and we want to dissolve the largest possible amount of potassium chloride in the solution

7 months ago
Jorge 7 months ago

The dissolution of potassium chloride is related to the temperature. It means that a high temperature promotes the dissolution, but a lower temperature reduces the leaching rate. If your leaching process is performed at environment temperature, the dissolution of potassium will show a limit no matter if you increase the residence time in the tanks. This means that the solution will hold increasingly smaller amounts of potassium chloride.

If the temperature is not increased, the energy of the water molecules will not enough mobility. In other words, the water molecules will not be very effective to make weaker the ionic bonds that are holding the particles of potassium chloride.

The first step is to perform leaching test at the lab to the determine the effect of different levels o temperature on the dissolution. It is necessary to indicate that the dissolution has a limit. Other parameter to evaluate is the percent solids. It is important to determine the limit.

6 months ago
morin2001 6 months ago

Hi I have a concentrate that consiste of sulphides and gold some is free most is bonded with it. I’m running into the problem of I don’t know what to do and safest and easiest way too process maybe doing a cyanide free leach? I’m only looking to get the gold not the copper or the little bit of silver. I’ve got 200 pounds of this concentrate and will be getting more. I’m looking for advice and answers on what would be the best method to separate the gold from the metals and sulphides. Smelting can be a option as well.



6 months ago
Jorge 6 months ago

If you try to smelt the concentrate, the dore bar would content gold and base metals. The gold grade has an impact on the dore bar quality. You should study carefullly the content of base metals in the concentrate. Also, you could perform a small test in the lab using 500 grams of concentrate.

Other option is to consider intensive cynaidation. This option is common to treat gravity and flotation concentrates contaning gold. See link below,




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