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Method for purifying and removing iron from electrodeposited copper anolyte

A technology for purifying and removing iron and anolyte, applied in the direction of improving process efficiency, can solve problems such as the influence of iron ions, rising power consumption per ton of copper, unqualified cathode copper quality, etc., to improve product quality, no waste residue, practicality strong effect

Pending Publication Date: 2021-09-03
ZHEJIANG TIANNENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for purifying and removing iron from the electrolytic copper anolyte, which aims to completely solve the above-mentioned bottleneck problems such as unqualified cathode copper quality and rising power consumption per ton of copper. The problem of the influence of iron ions in the copper production process

Method used

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  • Method for purifying and removing iron from electrodeposited copper anolyte
  • Method for purifying and removing iron from electrodeposited copper anolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0023] refer to figure 2 , the iron-rich anolyte after the copper electrodeposition, that is, the extraction stock solution, is introduced into the P204 extraction line; the composition of the extraction stock solution: the copper concentration is 35g / L, the iron concentration is 5g / L, and the sulfuric acid concentration is 185g / L.

[0024] The organic phase was prepared, using 260# solvent naphtha as the diluent, wherein the concentration of P204 was 25%, and the diluent was 75%.

[0025] The prepared organic phase and iron-rich cation solution were used for countercurrent extraction in 5 stages under the condition of flow ratio 2.5:1, the mixing time of each stage was 3min, and the extraction temperature was 25°C.

[0026] The concentration of iron in the loaded organic phase obtained by extraction is 1.4g / L, the concentration of copper is 0.001g / L, the extraction rate of iron reaches 64%, and the extraction rate of copper is only 0.001%.

[0027] The concentration of iron...

Embodiment 2

[0029] The iron-rich anolyte after copper electrodeposition, that is, the extraction stock solution, is introduced into the P204 extraction line; the composition of the extraction stock solution: the copper concentration is 40g / L, the iron concentration is 5g / L, and the sulfuric acid concentration is 210g / L.

[0030] The organic phase was prepared, using 260# solvent naphtha as the diluent, wherein the concentration of P204 was 30%, and the diluent was 70%.

[0031] Using the prepared organic phase and extraction stock solution, under the condition of flow ratio of 3:1, 5 stages of countercurrent extraction were used. The mixing time of each stage was 5 minutes, and the extraction temperature was 15°C.

[0032] The concentration of iron in the loaded organic phase obtained by extraction is 1.5g / L, the concentration of copper is 0.001g / L, the extraction rate of iron reaches 70%, and the extraction rate of copper is only 0.001%.

[0033] The concentration of iron in the raffinat...

Embodiment 3

[0035] The iron-rich anolyte after copper electrodeposition, that is, the extraction stock solution, is introduced into the P204 extraction line; the composition of the extraction stock solution: the copper concentration is 40g / L, the iron concentration is 5g / L, and the sulfuric acid concentration is 210g / L.

[0036] The organic phase was prepared, using 260# solvent naphtha as the diluent, wherein the concentration of P204 was 10%, and the diluent was 90%.

[0037] The prepared organic phase and extraction stock solution were used for three-stage countercurrent extraction under the condition of a flow ratio of 10:1, the mixing time of each stage was 10 min, and the extraction temperature was 55°C.

[0038] The iron concentration in the loaded organic phase obtained by extraction is 1.5g / L, the copper concentration is 0.001g / L, the extraction rate reaches 70%, and the copper extraction rate is only 0.001%.

[0039] The concentration of iron in the raffinate dropped to 1.5 g / L....

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Abstract

The invention relates to a method for purifying and removing iron from electrodeposited copper anolyte, which comprises the following steps: Step 1, preparing an extraction stock solution which is a sulfuric acid solution containing copper and iron; Step 2, preparing an organic phase, wherein the organic phase contains P204 and a diluent; and Step 3, performing counter-current extraction on the extraction solutions and the organic phase in the steps 1 and 2 to obtain a loaded organic phase and raffinate, wherein the extraction flow ratio is that the flow ratio of the organic phase to a water phase is (10: 1)-(1: 1), the number of extraction stages is 3-10, the mixing time of each stage is 3-10 minutes, and the temperature is 15-55 DEG C; the extraction stock solution in the Step 1 comprises the following components: copper with the concentration being 35-40 g / L, iron with the concentration being greater than or equal to 3 g / L, and sulfuric acid with the concentration being 185-210 g / L; the organic phase in the Step 2 comprises the 10-40% of P204 and the balance of the diluent; and the diluent in the Step 2 is 260 # solvent oil. According to the method, iron ions in the electrodeposited copper anolyte can be effectively removed, so that the content of the iron ions in the anolyte is reduced to 2 g / L or below; and the quality of an electrodeposited copper product is greatly improved, and the phenomenon that a hanging lug of cathode copper falls off is avoided.

Description

technical field [0001] The invention relates to a method for purifying and removing iron from electrolytic copper anolyte. Background technique [0002] Extraction technology revolutionized the hydrometallurgy of copper and created the modern hydrometallurgy industry. refer to figure 1 , use copper extractant to purify and remove copper from the production liquid, and then conduct copper electrodeposition on the stripping liquid to form an open circuit of copper in the system, and obtain an important by-product electrodeposited copper. The separation coefficient of copper and iron of the copper extractant is about 500-600, and with the increase of the number of recycling of the extractant, the separation coefficient of copper and iron drops to 350-500, so more iron ions will enter the copper electrowinning solution middle. After the stripping solution is subjected to copper electrowinning, the copper ions form metallic copper and an open circuit is obtained, and the anoly...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B15/00C22B3/38
CPCC22B7/005C22B15/0086Y02P10/20
Inventor 凌怊孔繁振刘元龙王科马佳徐静云刘亮丁伯芬
Owner ZHEJIANG TIANNENG NEW MATERIAL CO LTD
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