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Method for detecting effective gelatin concentration in copper electrolyte

A copper electrolyte and electrolyte technology, applied in the field of copper electrolysis, can solve the problems of systemic risk, long cycle, and difficulty in timely and accurate control of gelatin use, so as to reduce the interference of reduction peak current and reduce test interference. , the effect of high practical application significance

Active Publication Date: 2021-05-14
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problem that the existing copper electrolysis system has a long cycle and obvious system hysteresis effect, which makes it difficult to control the use of gelatin in a timely and accurate manner and brings systemic risks to production, the invention provides a method for detecting effective Gelatin concentration method, this method establishes the mapping law between the oxidation peak area of ​​deposited copper and the gelatin concentration through hydrodynamic voltammetry, and can quickly detect the gelatin content in the copper electrolyte, so that the gelatin adjustment in the production process can be realized advance adjustment

Method used

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  • Method for detecting effective gelatin concentration in copper electrolyte
  • Method for detecting effective gelatin concentration in copper electrolyte
  • Method for detecting effective gelatin concentration in copper electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0045] 1. In Cu 2+ Concentration 40g / L, sulfuric acid concentration 150g / L electrolyte, establish the standard curve of oxidation peak area and gelatin concentration

[0046] Select copper electrolyte solutions with gelatin concentrations of 10mg / L, 20mg / L, and 30mg / L respectively, and conduct the following tests on the electrolyte solutions with three gelatin concentrations in turn. The main salt composition and concentration in the copper electrolyte are: Cu 2+ Concentration 40g / L, sulfuric acid concentration 150g / L.

[0047] testing method:

[0048] (1) Liquid inlet: Add or pump the copper electrolyte into the test tank.

[0049] (2) Hydrodynamic voltammetry test: Insert three electrodes in the electrolyte to be tested in step (1), wherein the working electrode is a rotating disc electrode Pt, located in the middle of the test tank, and the saturated calomel electrode is a reference electrode , which is located 5mm above the working electrode, and the inert electrode is ...

Embodiment 2

[0057] 1. In Cu 2+ Concentration 60g / L, sulfuric acid concentration 200g / L electrolyte, establish the standard curve of oxidation peak area and gelatin concentration

[0058] Select copper electrolyte solutions with gelatin concentrations of 10mg / L, 20mg / L, 30mg / L, and 40mg / L respectively, and perform the following tests on the electrolyte solutions with four gelatin concentrations in turn, where the main salt composition and concentration in the copper electrolyte are: Cu 2+ Concentration 60g / L, sulfuric acid concentration 200g / L.

[0059] testing method:

[0060] (1) Liquid inlet: Add or pump the copper electrolyte into the test tank.

[0061] (2) Hydrodynamic voltammetry test: Insert three electrodes in the electrolyte to be tested in step (1), wherein the working electrode is a rotating disc electrode Pt, located in the middle of the test tank, and the saturated mercurous sulfate electrode is a reference The electrode is located 3 mm above the working electrode, and th...

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Abstract

The invention discloses a method for detecting the concentration of effective gelatin in a copper electrolyte, and belongs to the technical field of copper electrolysis. The technology can rapidly and quantitatively detect the effective concentration of gelatin in the copper electrolyte. According to the method, a hydrodynamic voltammetry is adopted, a rotating disc electrode is used as a working electrode, and the oxidation peak area during forward scanning is obtained in a scanning interval of 0.05 V to-0.1 V to 0.5 V (vs SCE); and a corresponding relation between the peak area and the gelatin concentration is established so as to obtain a standard curve, and the effective gelatin concentration in the copper electrolyte is determined rapidly according to the oxidation peak area of the solution to be tested. The application range of the copper electrolyte is as follows: the Cu<2+> concentration is 40-60g / L, the sulfuric acid concentration is 150-200g / L, and the gelatin is 0-40mg / L.

Description

technical field [0001] The invention belongs to the field of copper electrolysis, and more specifically relates to a method for detecting effective gelatin concentration in copper electrolyte. Background technique [0002] Copper electrolytic refining or electrolytic deposition is the main method to obtain high-purity cathode copper (>99.99%) products in the copper metallurgy industry at home and abroad. The impurity content and apparent quality of cathode copper are the two most important production control indicators. In order to produce qualified cathode copper products, in addition to controlling reasonable electrolysis process parameters and electrolyte impurity content, a certain amount of mixed organic additives are usually regularly added to the electrolyte, mainly including gelatin (bone glue), thiourea, Avaton, Casein, etc., among which gelatin is the most widely used and essential. The application of gelatin plays a vital role in increasing the cathode overpot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/333G01N27/30
CPCG01N27/48G01N27/333G01N27/30
Inventor 何世伟樊友奇李继华罗屹刘欢
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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