Method for removing chlorine from zinc solution by adopting cadmium removed and surface naturally-oxidized copper slag

A natural oxidation and copper oxidation technology, applied in the field of zinc hydrometallurgy, can solve the problems affecting the yield of zinc sheets, difficulty in stripping zinc sheets, and increased cathode power consumption, so as to improve the copper grade of copper slag and reduce the amount of copper slag added , The effect of simplifying the process

Inactive Publication Date: 2017-04-05
YUNNAN CHIHONG ZINC & GERMANIUM
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The zinc leaching solution contains chloride ions up to 1g/L after accumulation in the wet system, which causes equipment corrosion and anode plate corrosion during the electrolysi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for removing chlorine from zinc solution by adopting cadmium removed and surface naturally-oxidized copper slag
  • Method for removing chlorine from zinc solution by adopting cadmium removed and surface naturally-oxidized copper slag
  • Method for removing chlorine from zinc solution by adopting cadmium removed and surface naturally-oxidized copper slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare a small amount of waste electrolyte in the zinc immersion solution to obtain a zinc sulfate solution with an initial sulfuric acid concentration of 10g / L, and add 10kg / m 3 Copper oxide slag on the surface without cadmium removal, heated to 60°C for 0.8h, the filtered solution contained chloride ions <200mg / L, the data is as follows:

[0024] g / L Cl Zn Cu Cd Pre-chlorination solution 1.06 145 0.30 0.24 After chlorine removal 0.17 147 1.65 0.53

Embodiment 2

[0026] A small amount of waste electrolyte is prepared in the zinc immersion solution to obtain a zinc sulfate solution with an initial sulfuric acid concentration of 10g / L, and 3kg / m 3 Copper oxide slag on the surface without cadmium removal, heated to 60°C for 0.8h, the filtered solution contains >300mg / L of chloride ions, the data is as follows:

[0027] g / L Cl Zn Cu Cd Pre-chlorination solution 1.06 145 0.30 0.24 After chlorine removal 0.55 146 2.14 0.47

Embodiment 3

[0029] Prepare a small amount of waste electrolyte in the zinc immersion solution to obtain a zinc sulfate solution with an initial sulfuric acid concentration of 5g / L, and add 10kg / m 3 Copper oxide slag on the surface without cadmium removal, heated to 60°C for 0.8h, the filtered solution contained 300mg / L of chloride ions, the data is as follows:

[0030]

[0031]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for removing a chlorine from zinc solution by adopting cadmium removed and surface naturally-oxidized copper slag, and belongs to the field of zinc wet metallurgy. The method concretely comprises the following steps: 1, leaching cadmium from fresh copper and cadmium slag of the zinc solution in sulfuric acid to obtain cadmium removed copper slag with the Cu content of 15-70% and the Cd content of 0.2-1%; 2, piling up the cadmium removed copper slag until the surface is naturally oxidized and the natural oxidation degree is 5-35%; 3, adjusting the initial sulfuric acid concentration by using a chlorine-containing zinc solution, adding 5-50 kg/m<3> of the oxidized copper slag, and stirring the solution and the oxidized copper slag, wherein a ratio of NCu/NCl is 1.4-2.0, the chlorine removal temperature is controlled to be 30-80 DEG C, and the chlorine removal duration is 0.5-1 h; and 4, carrying out filtration and removal after the reaction ends in order to obtain a chlorine removed zinc solution and chlorine removed slag. The method adopting a prior cadmium removal technology reduces the impurity content of the copper slag, and improves the copper grade of the copper slag; the cadmium removed and surface naturally-oxidized copper slag is adopted to substitute fresh copper slag, so a copper sulfate or oxidized leached copper slag process for preparing a copper sulfate solution is avoided; and the method has the advantages of effective simplification of the process, production cost reduction, and increase of enterprises' economic benefits.

Description

technical field [0001] The invention belongs to the field of zinc hydrometallurgy, and in particular relates to a method for removing chlorine from zinc solution by adopting surface natural oxidation copper slag after removing cadmium. Background technique [0002] The zinc leaching solution contains chloride ions up to 1g / L after accumulation in the wet system, which causes equipment corrosion and anode plate corrosion during the electrolysis process, and causes corrosion products to deposit on the cathode plate, affecting the yield of zinc plates, increasing cathode power consumption, and zinc flakes Difficult to peel off. Especially for the application of zinc electrolysis large plate, the content of chloride ion is required to be less than 300mg / L. At present, the common copper slag dechlorination method in industry is to use the disproportionation reaction of copper. The specific chemical reaction is as follows: [0003] Cu+Cu 2+ +2Cl - =Cu 2 Cl 2 ↓ [0004] In i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22B19/20
CPCC22B19/26Y02P10/20
Inventor 蒋荣生马云川顾利坤邹坤呈李云陈波吴红林张鸭林吕亚彪张特
Owner YUNNAN CHIHONG ZINC & GERMANIUM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap