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Composite additive and application thereof in zinc electrodeposition

A compound additive and organic additive technology, applied in the electrolysis process, electrolysis components, photography process and other directions, can solve the problem of high energy consumption in the electrolytic zinc process, and achieve the effect of saving equipment cost, power consumption cost and waste reduction.

Active Publication Date: 2019-11-29
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the technical problem of high energy consumption in the electrolytic zinc process in the prior art, the present invention provides an organic additive and its application in electrolytic zinc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Electrowinning experiments were carried out in an electrolytic cell with auxiliary devices such as heating and rehydration.

[0041] Before the start of zinc electrowinning, the electrolyte solution with a concentration of zinc sulfate of 53g / L, a concentration of manganese sulfate of 5.0g / L and a concentration of sulfuric acid of 170g / L was placed in the electrolytic cell; at 450A / m 2 Electrodeposit zinc for 24 hours at a current density of 24 hours. In the process of electrolytic zinc, bone glue (added in the form of pulped bone glue), sodium dodecylsulfonate and cetyltrimethylammonium bromide are batched together (adding in three times, each adding amount is equal) joins in the electrolyzer, and the volume of electrolytic solution is 1L meter, and the total adding amount of bone glue is 15mg, and the total adding amount of sodium dodecylsulfonate is 0.5mg, The total amount of cetyltrimethylammonium bromide added is 0.5mg, and the electrolyte Zn 2+ Concentration and ...

Embodiment 2

[0044] Electrowinning experiments were carried out in an electrolytic cell with auxiliary devices such as heating and rehydration.

[0045] Before the start of zinc electrowinning, the electrolyte solution with a zinc sulfate concentration of 53g / L, a manganese sulfate concentration of 5.0g / L and a sulfuric acid concentration of 170g / L was placed in the electrolytic cell; at 500A / m 2 Electrodeposit zinc for 24 hours at a current density of 24 hours. In the process of electrolytic zinc, bone glue (added in the form of pulped bone glue), sodium dodecylsulfonate and cetyltrimethylammonium bromide are batched together Add in the electrolytic cell once (into four additions, each adding amount is equal), based on the volume of the electrolyte as 1L, the total amount of bone glue added is 20mg, and the total amount of sodium dodecylsulfonate added is 1.0mg , the total amount of cetyltrimethylammonium bromide added is 2.5mg, and the electrolyte Zn 2+ Concentration and H + The concen...

Embodiment 3

[0048] Electrowinning experiments were carried out in an electrolytic cell with auxiliary devices such as heating and rehydration.

[0049] Before the start of zinc electrowinning, the electrolyte with a concentration of zinc sulfate of 53g / L, a concentration of manganese sulfate of 5.0g / L and a concentration of sulfuric acid of 170g / L was placed in the electrolytic cell; at 480A / m 2 Electrodeposit zinc for 24 hours at a current density of 24 hours. In the process of electrolytic zinc, bone glue (added in the form of pulped bone glue), sodium dodecylsulfonate and cetyltrimethylammonium bromide are batched together Add in the electrolytic cell once (into six additions, the amount added each time is equal), based on the volume of the electrolyte as 1L, the total amount of bone glue added is 25mg, and the total amount of sodium dodecylsulfonate added is 1.5mg , the total amount of cetyltrimethylammonium bromide added is 1.0mg, and the electrolyte Zn 2+ Concentration and H + The...

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PUM

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Abstract

The invention relates to a composite additive and application thereof in zinc electrodeposition, and belongs to the technical field of zinc hydrometallurgy. The technical problem of high energy consumption of a zinc electrodeposition process in the prior art is solved, and an organic additive and application thereof in the zinc electrodeposition are provided. The composite additive comprises the organic additive and bone glue, wherein the organic additive is one or more of sodium dodecyl sulfate, hexadecyl trimethyl ammonium chloride and hexadecyl trimethyl ammonium bromide, and each organic additive accounts for 0.50-2.5 parts by weight; the bone glue is 15-25 parts by weight. When applied to the zinc electrodeposition, the composite additive can inhibit the hydrogen evolution reaction ofa cathode, reduce the tank voltage, reduce energy waste and improve the current efficiency.

Description

technical field [0001] The invention belongs to the technical field of zinc hydrometallurgy, and in particular relates to a composite additive and its application in electrolytic zinc deposition. Background technique [0002] At present, there are about 200 zinc factories in my country, with an annual output of about 6 million tons of zinc, of which about 90% use hydrometallurgy. The process of hydrometallurgy zinc is mainly composed of roasting, acid production, leaching, liquid purification, electrowinning and other processes. The specific process is: ZnS ore is first roasted to form ZnO and by-product SO 3 , with the by-product SO 3 Made H 2 SO 4 , and then made H 2 SO 4 Dissolve ZnO to generate ZnSO 4 , and finally electrolysis from ZnSO 4 Pure metal Zn is extracted from the electrolyte. [0003] Electrodeposited zinc is purified ZnSO 4 The solution is mixed with the electrolytic waste liquid, and continuously flows into the electrolytic cell from the liquid inl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/16C25C7/06
CPCC25C1/16C25C7/06
Inventor 邢巍郏建波张旭泳王晨梁亮李晨阳高红梅李丹丹刘世伟
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI