I would like to ask about the extraction plan
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I plan to carry out a wet extraction process to conduct extraction and separation experiments for Fe, Cu, Co, Ni, etc. I would like to ask for suggestions regarding the extraction scheme. The leachate levels (for a single leaching cycle) are as follows: Fe: 2 kg/m3, Mg: 0.8 kg/m3, Ca: 1.5 kg/m3, Cu: 0.8 kg/m3, Co: 0.16 kg/m3, Ni: 0.07 kg/m3, Mn: 0.012 kg/m3, Zn: 0.02 kg/m3; pH: 1.5. During the experiment, iron exists in the form of ferrous ions, and the system consists of 2 mol/l ammonium chloride
To recycle copper and cobalt, does one need to remove iron and separate nickel?
In my opinion, the general plan could be as follows: copper extraction — impurity removal using P204 — extraction and separation of nickel and cobalt using P507.
Should the iron be separated in advance? What method should be used for copper extraction?
Extract copper directly using a copper extractant； The raffinate is purified using P204 to remove impurities such as Fe, Mg, Zn, etc., leaving behind a nickel-cobalt solution ； P507 is used for the extraction and separation of cobalt and nickel. The poster should read more relevant materials to choose the best option.
Is the copper extractant CP-150? Still LIX98
The target system is high cobalt and low nickel, which seems too luxurious.
The concentration of the target metal ions is too low; it is more appropriate to first precipitate and concentrate it before proceeding with further treatment.
Is Fe, Mg, and Zn extracted by P204 in one step? I’ve seen literature on using P204 for nickel extraction; can it be achieved by properly controlling the conditions? A newcomer posting their first thread; hoping someone will respond.
The nickel and cobalt content in this solution is too low. First, iron removal is carried out chemically: the pH is adjusted to 2.5 using a base to remove iron, followed by chemical removal of calcium and magnesium. Copper and zinc are removed using 204 as a purification agent. After that, C272 is used to concentrate nickel and cobalt to a certain level, after which back-extraction is performed
Is Fe, Mg, and Zn extracted by P204 in one step? I’ve seen literature on using P204 for nickel extraction; can it be achieved by properly controlling the conditions? A newcomer posting their first thread; hoping someone will respond. Magnesium is difficult to remove using extractants (whether 204, 507, or 272) because it is very close to the nickel-cobalt particles and cannot be separated from them
For the cobalt system, it may not be necessary to remove calcium and magnesium; magnesium can be removed through extraction, and by adjusting the extraction pH and performing washing, magnesium can be left in the nickel solution. Huayou is said to be doing this!
Is Fe, Mg, and Zn extracted by P204 in one step? Extraction to remove magnesium, adjusting the extraction pH and washing are preferred over leaving magnesium in the nickel solution