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Methpd for separating and recovering Sb and Bi

A technology of separation and recovery and eluent, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of ineffective separation and recovery of Sb and Bi, the use of hydrogen sulfide gas, and the generation of arsenic gas.

Inactive Publication Date: 2006-03-29
JX NIPPON MINING & METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the methods of Patent Documents 1 and 2, there is a problem that Sb and Bi cannot be effectively separated and recovered.
In the method in Patent Document 3, there is a problem of using hydrogen sulfide gas
[0006] In addition, in the method in Patent Document 4, it is desirable to oxidize and decompose EDTA in the wastewater treatment process and then discharge it. In the methods in Patent Documents 5 and 6, when the equipment is complicated and the eluent contains As, there may be Arsenic gas production

Method used

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  • Methpd for separating and recovering Sb and Bi
  • Methpd for separating and recovering Sb and Bi
  • Methpd for separating and recovering Sb and Bi

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (Sb neutralizes dross 2-step dry process)

[0063] The chelating resin (Purolite S950) after adsorbing Sb and Bi was eluted with 6N hydrochloric acid solution, and an eluent having a composition as shown in Table 1 was recovered.

[0064] As

[0065] The above-mentioned eluate was neutralized to pH 2 with NaOH, followed by solid-liquid separation, and Sb neutralized residue was recovered.

[0066] Next, the neutralized filtrate having a pH of 2 was neutralized to pH 4 with NaOH, followed by solid-liquid separation, and Bi neutralized dross was recovered. Table 2 shows the composition of each neutralized residue. Concentrations up to 29.0 mass% Sb can be recovered from Sb neutralized dross. Concentrations up to 25.0 mass% Bi were recovered from Bi-neutralized slag.

[0067] As

[0068] Sb neutralizes dross to neutralize dross: Na 2 CO 3 : Charcoal powder = 10:2:1 ratio was mixed, dissolved at 900°C, and Sb metal (75.0mass% of Sb) was recovere...

Embodiment 2

[0072] (Sb neutralizes dross 1-step dry process)

[0073] In the 1-step dry process, in order to reduce the As in the recovered Sb metal, the solvent Na 2 CO 3 NaOH was used instead, and the ratio of neutralization residue: NaOH: carbon powder = 4:2:1 was mixed, dissolved at 950°C, and Sb metal (85mass% of Sb) with the composition shown in Table 4 below was recovered. In addition, since the treatment is performed at a high temperature of 950°C, when As is removed as an alkaline salt, Sb is also oxidized and volatilized, and the mobility of Sb to Sb metal is only 48%, which is extremely low. Although As can be removed, it is difficult to be used industrially because the recovery rate of Sb is poor as described above.

[0074] As

Sb

Bi

Cu

mass%

mass%

mass%

mass%

Sb metal

0.1

85.0

12.0

1.4

[0075] When reclaiming Sb metal, if the reduction melting of the neutralization dross and the operation of r...

Embodiment 3

[0078] (Bi neutralizes dross 2-step dry process)

[0079] With respect to the Bi neutralized dross, similarly to the Sb neutralized dross, a dissolution test may be carried out after recovering the metal by dry processing.

[0080] Set the blending ratio to Neutralize Dross: Na 2 CO 3 : carbon powder = 15:14:2, processed at a temperature of 900°C.

[0081] As shown in Table 5 below, Bi was 70.0 mass% in the recovered metal composition.

[0082] As

Sb

Bi

Cu

mass%

mass%

mass%

mass%

Bi metal

14.0

0.33

70.0

14.0

[0083] Then, in order to remove As from the recovered Bi metal, the recovered metal was subjected to alkali treatment at 750° C. (mixed with NaOH and redissolved).

[0084] As shown in Table 6 below, the metal composition after alkali treatment was 80.0 mass%.

[0085] As

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Abstract

To provide a method by which Sb and Bi in a copper electrolytic solution can be separated and recovered using simple equipment with superior selectivity and the reuse of an eluate is made possible. The copper electrolytic solution is brought into contact with a chelate resin to make the chelate resin adsorb Sb and Bi, and a hydrochloric acid type eluate is brought into contact with the chelate resin to elute Sb and Bi. An Sb metal is recovered by dry treatment from Sb neutralized slag recovered by neutralizing the resultant Sb- and Bi-containing eluant within a pH range of 1.5 to 3.0. Then a Bi metal is recovered by dry treatment from Bi neutralized slag recovered by neutralizing the eluant within a pH range of 4 to 5. Further, the concentration of chlorine in the liquor after the Bi neutralization is regulated to 6 mol / L, and the liquor is reused as a chelate resin eluate.

Description

technical field [0001] The present invention relates to using chelating resin to adsorb and remove Sb and Bi contained in the copper electrolytic solution used in copper electrolytic refining as impurities, and then selectively reclaim Sb and Bi from the chelating resin eluent, and to recover The method of reusing the eluate after Sb and Bi. Background technique [0002] The copper electrolytic solution used in copper electrolytic refining contains Sb or Bi as an impurity, and when these components in the copper electrolytic solution exceed a certain concentration, it will adversely affect the quality of electrolytic copper as a product. [0003] Therefore, various methods are used to clean the copper electrolyte. For example, as a method of reclaiming Sb and Bi from the copper electrolyte, there is a method of making the copper electrolyte contact the chelating resin, adsorbing Sb and Bi on the resin, and then making the eluent contact with the resin to recover Sb and Bi. ...

Claims

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Application Information

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IPC IPC(8): C22B30/00C22B30/02C22B30/06C22B3/24C25C1/12C25C7/06
CPCY02P10/20
Inventor 冈本秀则堤幸仁木村幸夫田尻和德
Owner JX NIPPON MINING & METALS CO LTD
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