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Copper nickel cobalt metals extraction technology

Copper nickel cobalt metals extraction technology

2021-06-24

Information form customer:

The average results for recovery are this.  

Lab Results Summary


TEST

Al

Ca

Cd

Co

Cu

Fe

Mg

Mn

Zn

Recov

Recov

Recov

Recov

Recov

Recov

Recov

Recov

Recov

Extraction

DZ 988N

E1 Aqua

11,9%

9,9%

13,2%

13,1%

98,7%

20,1%

11,3%

13,0%

10,0%

DZ 988N

E2 Aqua

13,4%

12,0%

13,2%

-2,1%

20,9%

21,0%

10,5%

13,5%

-1,1%

DZ 988N

E3 Aqua

14,4%

12,3%

14,7%

0,9%

40,4%

23,8%

12,3%

14,4%

0,7%



Extraction

25%

22%

26%

11%

99%

18%

22%

26%

9%

Stripping

DZ 988N

S1 Aqua

0,0%

0,0%

0,0%

0,0%

0,3%

0,0%

0,0%

0,0%

3,1%

DZ 988N

S2 Aqua

0,0%

0,0%

0,0%

0,0%

0,1%

0,1%

0,0%

0,0%

0,0%



No tripped

0,0%

0,0%

0,0%

0%

0%

0%

0%

0%

0%

 

We are happy with the copper recovery and stripping efficiency. Where we find a problem is in the differences of extraction of other metals.

 

DZ988N/Acorga M5604

Al

Ca

Cd

Co

Cu

Fe

Mg

Mn

Zn

Recov

Recov

Recov

Recov

Recov

Recov

Recov

Recov

Recov

Exctraction

5%

6%

6%

2%

0%

9%

4%

6%

3%

Stripping

0%

0%

0%

0%

0%

0%

0%

0%

0%

 

Here you have the increase of extraction of different metals. We are really concern about the extraction of 2% more Cobalt (losses in the cobalt circuit) 9% of iron and a 3% of Zn hat will interfere with the optimal parameters of the EW circuit.

The working conditions have been.

EXTRACTION:

  1. E1 pH 1.2- 40°C

  2. E2 PH 1.3-40°C

  3. E3 pH 1.5-40°C

(in the factory we lose 1.5 C degrees between E3 and E1)  

STRIPPING

  1. S1 pH 0.5

  2. S2 PH 0.25

 

20% Extractant, Ratio Organic/Aqua 2.5 in extraction and 0.5 in Stripping

 

The reagents used for pH adjustment where, NaOH solution and H2SO4 Solution.

In the stripping circuit we look to use parameters that we will use in the EW circuit for an optimal copper recovery stage.

Mr. Jeven, we are thinking to work more with your product in the future, looking to optimize temperature pH, Extractant load (x%) etc. But I want some advice from you. Please check the results and share with me your observations.

 

Our suggestion:

Copper extractant specialist:

Please use DZ988N to extract copper as clean as possible, the pH value should be between 2.2 to 2.5, the extraction effect will be best. After that, the cost in process of zinc, cobalt extraction and the removal of impurities will be cheaper.

For DZ988N also need notice two points: the working temperature can be nature temperature, the volume rate of organic/aqua should be 1:1, if the content of copper is very high, can use 2:1. On our catalog has introduced this laboratory test process clearly, please refer it.

 

Professor of Product Development and Applications:

1.        Extract Cu: As your data, the extraction ability is too strong, all metal was extracted out, especially Cu & Fe, lost the selective ability. So, please adjust the concentrate of organic phase to 10%-15%, at normal temperature, use 1:1 phase ratio, repeat to test it, till reach the selective ability of Cu:Fe over 1000:1, it means that only extract Cu out. If the content of Cu is high, can raise the phase ratio of organic and aqueous, until 2:1.

2.        Remove impurity by precipitation: Use NaOH, PH value 3.8-4.2.

3.        Use P204 remove impurity: Use 260# solvent oil dilute the concentrate to 10%, can adjust the phase ratio, to remove Fe, Zn, Al and Mg.

4.        Use DZ272 around 50°C temperature to extract Co, Mg out, leave Ni. Mg can be washed away.

 

After getting our suggestion, customer said: Dear Jeven, we are finishing some test. We will repeat yours when we finish our actual lab program following your indications. Let wait for their result.


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Please send email to jeven@metalleaching.com. Thanks.
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