Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for reducing zinc powder consumption in process of purifying zinc sulfate solution

The technology of zinc sulfate solution and zinc powder is applied in the direction of improving process efficiency, which can solve the problems of large consumption of zinc powder in electric furnace, and achieve the effects of remarkable economic benefit, improved reaction speed and simple operation.

Inactive Publication Date: 2015-04-29
YUNNAN TIN
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology helps solve problems with producing high-quality pure metal from electrolyte solutions containing large amounts (>30%) of impurities such as iron). By controllably increasing or decreasing the acidic concentration at which certain metals are dissolved during processing, it becomes possible for these materials to be separated out effectively without causing damage. Additionally, this method allows for efficient use of expensive raw material while minimizing waste. Overall, this new technique makes production processes faster and easier.

Problems solved by technology

This patented technical problem addressed by this patents relates to improving the efficiency at removing contaminants such as iron oxide during zinc-hydride plating processes. Specifically, current methods require multiple steps involving different materials with high costs due to their long processing time.

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 reducing zinc powder consumption in process of purifying zinc sulfate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] ①Take 4L of the middle supernatant of zinc sulfate solution produced in the leaching section of the hydrometallurgy system of a smelter, pH=5-5.4, the main components are: Zn 120.56g / L, Cu 168.23mg / L, Cd 1560mg / L L, Co 2.14 mg / L, Ni 2.04 mg / L, As 0.17 mg / L, Sb 0.53 mg / L, F 150.31 mg / L, Cl 425.78 mg / L. Under agitation, heat the middle supernatant to 50-60°C.

[0018] ② Add the waste electrolyte produced by the electrolysis of the zinc system (you can also add acetic acid, nitric acid or phosphoric acid), and control the pH of the solution to 1.5.

[0019] ③Slowly add 5.14g of 365-mesh electric furnace zinc powder required for the displacement reaction, and the metal zinc content in the electric furnace zinc powder is 86%. The reaction time is 30 minutes.

[0020] ④ After the reaction, filter the solution to obtain copper and cadmium removal solution and copper and cadmium slag. The copper and cadmium removal solution contains Cu 0.26mg / L and Cd 16.01mg / L, which is sen...

Embodiment 2

[0022] ① Take 4L of the middle and supernatant of zinc sulfate solution produced in the leaching section of the hydrometallurgy system of a smelter, pH=5-5.4, the main components are: Zn 125.89g / L, Cu 350.91mg / L, Cd 2180mg / L L, Co 1.97mg / L, Ni 2.33 mg / L, As 0.14mg / L, Sb 0.46mg / L, F 145.28 mg / L, Cl 480.16mg / L. Under agitation, heat the middle supernatant to 50-60°C.

[0023] ② Add sulfuric acid to control the pH of the solution to 4.5.

[0024] ③Slowly add 7.63g of 120-mesh electric furnace zinc powder required for the displacement reaction, and the metal zinc content in the electric furnace zinc powder is 87%. The reaction time is 55min.

[0025] ④ After the reaction, filter the solution to obtain copper and cadmium removal solution and copper and cadmium slag. The copper and cadmium removal solution contains Cu 0.13mg / L and Cd 19.28mg / L, which is sent to the deep purification section for cobalt and nickel removal; the copper and cadmium slag contains Cu 9.43%, Cd 52.61%, a...

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 belongs to the technical field of purification and production of zinc sulfate solutions, and particularly relates to a method for reducing the zinc powder consumption in the process of purifying a zinc sulfate solution. The method comprises the following process steps: (1) in the state of stirring, heating liquid supernatant in the zinc sulfate solution to 50-60 DEG C; (2) adjusting the pH value of the solution to be 1-4.5; (3) adding a theoretical amount of electric furnace zinc powder required by a replacement reaction, and removing copper and cadmium in the solution, wherein the reaction time is 30-60 min; and (4) after the reaction is completed, filtering the obtained solution to obtain copper-cadmium-removed liquid and copper-cadmium residues, conveying the copper-cadmium-removed liquid to a deep purified cobalt nickel removal section to process, and further comprehensively recovering valuable metals from the copper-cadmium residues. The method disclosed by the invention is used for solving the problem that zinc powder in the process of purifying the zinc sulfate solution is excessive; the method is simple and practical in operation; and the cost of the electric furnace zinc powder can be saved by over 50%, therefore, the method has remarkable economic benefits.

Description

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

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
Owner YUNNAN TIN
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com