Method for improving electrolytic current efficiency, metal electrowinning method, and metal electrowinning device

A technology of electrolysis current and efficiency, applied in the direction of process efficiency improvement, electrolysis components, electrolysis process, etc., can solve the problem of low cathode current efficiency, achieve the effect of improving cathode current efficiency, low energy consumption, and simple process flow

Active Publication Date: 2019-01-29
SHENZHEN SHENTOU ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many deficiencies in the current use of ion membrane electrolysis technology to extract target metals in the metal electrowinning system where the target metal ions are stable, such as the problem of low cathode current efficiency.

Method used

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  • Method for improving electrolytic current efficiency, metal electrowinning method, and metal electrowinning device
  • Method for improving electrolytic current efficiency, metal electrowinning method, and metal electrowinning device
  • Method for improving electrolytic current efficiency, metal electrowinning method, and metal electrowinning device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0039] The metal electrowinning in this embodiment is copper electrowinning, that is, copper is extracted by electrowinning, and it is equipped with 10L copper chloride electrolytic working solution. The components and contents are as follows: copper chloride 2mol / L; hydrochloric acid 2mol / L; sodium chloride 2mol / L. Take 250mL of the above-mentioned electrolytic working solution, dilute it to 1L with a background salt solution containing 2mol / L hydrochloric acid and 2mol / L sodium chloride as the working electrolytic solution, and reduce the concentration of copper chloride to 0.5mol / L. Take this 1L electrolytic working solution to fill the cathode and anode chambers of the electrolytic cell, and carry out electrolysis of the separator to recover metallic copper. With the titanium plate as the cathode and the iridium-coated tantalum-titanium plate as the anode, the current density is 300A / m 2 , the temperature is 25°C, and the electrodeposition is carried out under the conditi...

no. 2 approach

[0041] The metal electrowinning of this embodiment is ferroelectrowinning, that is, iron is extracted by electrowinning, and it is equipped with 10L ferric chloride electrolytic working solution, and the components and contents are as follows: ferric chloride 2mol / L; hydrochloric acid 1mol / L; chlorine Sodium chloride 2mol / L; take 200mL of the above electrolytic working solution, dilute it to 1L with a background salt solution containing hydrochloric acid 1mol / L; sodium chloride 2mol / L as the electrolytic working solution, and reduce the concentration of ferric chloride to 0.4mol / L . Take this 1L electrolytic working solution to fill the anode and cathode chambers of the electrolytic cell, and carry out electrolysis of the separator to recover metallic iron. With titanium plate as cathode and iridium-coated tantalum titanium plate as anode, the current density is 250A / m 2 , the temperature is 30°C, and the electrodeposition is carried out under the conditions of 5cm different ...

no. 3 approach

[0043] The metal electrowinning in this embodiment is tin electrowinning, that is, tin is extracted by electrowinning, and it is equipped with 10L tin tetrachloride electrolytic working solution. The components and contents are as follows: tin tetrachloride 0.8mol / L; hydrochloric acid 4mol / L; Sodium chloride 2mol / L; Take 250mL of the above-mentioned electrolytic working solution, dilute it to 1L with a background salt solution containing hydrochloric acid 4mol / L; L. Take this 1L electrolytic working solution to fill the anode and cathode chambers of the electrolytic cell, and carry out electrolysis of the separator to recover metallic iron. With titanium plate as cathode and iridium-coated tantalum titanium plate as anode, the current density is 350A / m 2 , the temperature is 30°C, and the electrodeposition is carried out under the conditions of 5cm different pole distance, the total effective area of ​​the cathode is 0.016m 2 . Observe the precipitation of tin on the cathod...

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Abstract

The invention provides a method for improving the efficiency of electrolytic current. The method includes the steps that an electrolytic working solution is prepared and includes background electric conduction ions and electrolytic target metal ions, wherein the concentration of the background electric conduction ions is higher than that of the target metal ions; the electrolytic working solution enters an electrolyzing unit in a filling manner, and the electrolyzing unit is provided with a cathode room and an anode room; and the electrolytic working solution is controlled to pass through the part between the cathode room and the anode room in a directional and orderly manner and at a constant speed. The invention further provides a method for conducting metal electrodeposition through the above method and a metal electrodeposition device.

Description

technical field [0001] The invention relates to a method for improving electrolytic current efficiency, a metal electrolytic deposition method and a metal electrolytic deposition device. Background technique [0002] Electrolysis technology is used in a wide range of technical fields of electrochemistry, for example in the electrowinning of metals. Metal electrowinning is to place the cathode and anode in the electrolytic cell. Under the action of the electric field, the anions move directionally to the anode, and the cations move directionally to the cathode. By controlling certain technical conditions, the target metal cations are deposited and precipitated by obtaining electrons at the cathode. Thus, the target metal electrodeposition product is obtained. [0003] For the electrodeposition extraction of target metals in a solution system in which the target metal (including intermediate valence state) ions can exist stably, the currently selected method is ion membrane e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/12C25C1/06C25C1/14C25C7/06C25C7/04
CPCC25C1/06C25C1/12C25C1/14C25C7/04C25C7/06Y02P10/20
Inventor 毛谙章李钧姚标
Owner SHENZHEN SHENTOU ENVIRONMENT TECH CO LTD
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