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

A method for reducing consumption of zinc powder in hydrometallurgy

A technology of hydro-smelting zinc and zinc powder, applied in the direction of improving process efficiency, etc., can solve problems such as unstable supply of auxiliary materials, achieve the effects of improving utility, improving effective zinc utilization, and improving copper and cadmium grades

Active Publication Date: 2020-04-14
GUILIN UNIVERSITY OF TECHNOLOGY
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

We proposed a process and equipment design idea for zinc powder consumption reduction, which provides a very good route for zinc smelting enterprises in terms of cost control and consumption reduction of auxiliary materials, and also solves the thorny problem of unstable supply of auxiliary materials

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
  • A method for reducing consumption of zinc powder in hydrometallurgy
  • A method for reducing consumption of zinc powder in hydrometallurgy
  • A method for reducing consumption of zinc powder in hydrometallurgy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) At a temperature of 80° C., the pH is 4, and the concentration of copper, cadmium and zinc is respectively 1000 mg / L, 200 mg / L and 150 g / L of heavy alum supernatant into the reaction tank.

[0021] (2) Put the "non" shaped stirring paddle equipped with zinc plate into the reaction tank of step (1), stir the reaction time for 0.5 hour, see Table 1 for the change of copper concentration in the solution, and the purification slag contains 10.5% zinc.

[0022] Table 1: Changes in the concentration of copper ions in the supernatant of sinking alum at 80°C under the replacement of zinc flakes

[0023]

Embodiment 2

[0025] (1) At a temperature of 70° C., the pH is 4.5, and the concentration of copper, cadmium and zinc is respectively 1000 mg / L, 200 mg / L and 150 g / L.

[0026] (2) Put the "non" shaped stirring paddle equipped with zinc plate into the reaction tank of step (1), stir the reaction time for 0.5 hour, see Table 2 for the change of copper concentration in the solution, and the purification slag contains 9.5% zinc.

[0027] Table 2: Changes in the concentration of copper ions in the supernatant of 70°C low leaching under the replacement of zinc flakes

[0028]

Embodiment 3

[0030] (1) At a temperature of 60° C., the pH is 5, and the concentration of copper, cadmium and zinc is respectively 1000 mg / L, 200 mg / L and 150 g / L of heavy alum supernatant into the reaction tank.

[0031] (2) Put the "non" shaped stirring paddle equipped with zinc plate into the reaction tank of step (1), stir the reaction time for 1 hour, the change of copper concentration in the solution is shown in Table 3, and the purification slag contains 11.2% zinc.

[0032] Table 3: Changes in the concentration of copper ions in the supernatant of sinking alum at 60°C under the replacement of zinc flakes

[0033]

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 discloses a zinc powder consumption reduction method for zinc hydrometallurgy. The zinc powder consumption reduction method comprises the steps that (1), in the temperature range from 60DEG C to 95 DEG C, sunk alum supernatant or primary leach supernatant with the pH of 1.5-5.5, the copper concentration of 500-1,200 mg / L, the cadmium concentration of 200-600 mg / L and the zinc concentration of 100-150 g / L is put into a reactive tank, and the solution pH is 1.5-2.5; and (2), a stirring paddle which is shaped like a Chinese character 'fei' and provided with a zinc plate is put intothe reactive tank in the step (1), the stirring reaction time lasts 0.5-1 hour, the copper concentration in the solution is decreased to 100-250 mg / L, the zinc plate is replaced when the zinc plate is consumed to have the thickness of 0.5-0.8 mm, and the residual zinc plate is returned to a casting workshop to be repoured. According to the zinc powder consumption reduction method for the zinc hydrometallurgy, zinc powder is replaced with the zinc plate, the zinc powder consumption is reduced, the production cost is reduced, the effective zinc utilization rate is greatly increased, the cooperand cadmium grade is significantly increased, and production control in the leaching process is facilitated.

Description

technical field [0001] The invention relates to a method for reducing the consumption of zinc powder in hydrometallurgy, which belongs to the field of zinc hydrometallurgy in nonferrous metals. [0002] technical background [0003] More than 85% of the world's zinc production is produced by hydrometallurgy. The main flow of zinc hydrometallurgy process is fluidized roasting of zinc sulfide concentrate - leaching - purification - electrowinning - melting and casting - zinc ingot. Among them, the leaching process is divided into conventional leaching process, high temperature and high acid leaching jarosite iron removal process, high temperature and high acid leaching goethite iron removal process, etc. In the purification process, the main process is to remove copper, cadmium, cobalt, nickel, arsenic, antimony and other impurities in the zinc sulfate solution by using two-stage or three-stage methods such as zinc powder antimony salt, zinc powder arsenic salt, and zinc powde...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/46C22B19/20
CPCC22B3/46C22B19/26Y02P10/20
Inventor 李义兵何芳明郑继明肖超孟征兵
Owner GUILIN UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com