Processing method of zinc smelting byproducts

A treatment method and by-product technology, which are applied in the treatment of zinc smelting by-products and the treatment of cadmium-rich smoke and dust, can solve the problems of complex process, large consumption of zinc powder, and many secondary materials, and achieve simplified treatment process flow, The effect of shortening the production cycle and reducing the processing cost

Inactive Publication Date: 2009-09-02
BEIJING GENERAL RES INST OF MINING & METALLURGY
View PDF0 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Using the above-mentioned process to treat zinc-containing copper-cadmium slag or cadmium-rich smoke produced in the process of hydrometallurgy zinc, the process is very complicated, the treatment cycle is long, the types of chemical

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example one

[0014] This embodiment provides a method for treating zinc smelting by-products. First, the copper cadmium slag is heat-treated in the air, and the heat-treated copper cadmium slag is leached at room temperature with a mixed aqueous solution of ammonia and ammonium sulfate (or ammonium carbonate), and then organic extraction is used The method of solvent extraction removes copper, and then the metal cadmium is directly produced from the solution containing zinc and cadmium by the low current density electrolysis method. Specifically: Take 900g of copper-cadmium slag, the main components of which are (%): Zn 36.51, Cu 3.63, Cd 7.85, Fe 2.55, As 0.05, Sb 0.02, heat treated in air at a temperature of 260~310℃ for 8h, then poured after cooling Put into a 5L beaker, add 3.5L of a mixed aqueous solution of ammonia and ammonium sulfate (or ammonium carbonate), the concentration of ammonia in the mixed aqueous solution is 40g / L, and ammonium sulfate (or ammonium carbo...

Example Embodiment

[0015] Example two

[0016] This embodiment provides a method for treating zinc smelting by-products. First, a mixed aqueous solution of ammonia and ammonium sulfate (or ammonium carbonate) is used to extract cadmium-rich fumes at room temperature, and then the copper is removed by an organic extractant extraction method, and then a low current density is used. The electrolysis method directly produces metallic cadmium from a solution containing zinc and cadmium. Specifically: take 1000g of cadmium-rich smoke dust, the main components of which are (%): Zn 0.51, Pb 50.62, Cd 14.32, As 0.96, pour it into a 5L beaker, and add 3.5L of a mixed aqueous solution of ammonia and ammonium sulfate (or ammonium carbonate) , The ammonia concentration in the mixed aqueous solution is 40g / L, and the ammonium sulfate (or ammonium carbonate) is 120g / L. The leaching time is 12h and the leaching temperature is 45℃. After leaching, the leaching solution is filtered. Since there is no copper in the ca...

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 processing method of zinc smelting byproducts. The method comprises the following steps: firstly, using a mixed aqueous solution of ammonia and ammonia sulfate (or salvolatile) to leach copper-cadmium slag or cadmium-rich soot after heat treatment at a room temperature; then, decoppering a leaching solution by an organic solvent extraction method; directly producing metal cadmium from a solution containing zinc and cadmium by a low current density electrolytic method instead of a technological method of adopting zinc powder replacement to obtain sponge cadmium; using a sulphuric acid solution as strip liquor to strip copper from a decoppered organic extraction agent and then electrolyzing the copper-contained strip liquor to prepare the metal copper; in addition, electrolyzing the decoppered leaching solution which only contains zinc and cadmium to extract the cadmium; eliminating the mutual interference of copper ions and cadmium ions in the electrolytic process of the cadmium; and returning the electrolyzed leaching solution to the zinc production process. The method simplifies the processing technological process, shortens the product period, can respectively obtain a purer copper product and a purer cadmium product and decreases the zinc smelting byproducts and the processing cost.

Description

technical field [0001] The invention relates to a treatment method for by-products of zinc smelting, and belongs to the technical fields of environmental protection and comprehensive utilization of nonferrous metals. In particular, it relates to a treatment method for copper cadmium slag produced in the process of hydrometallurgy and cadmium-rich smoke produced during zinc smelting. technical background [0002] In the process of hydrometallurgy, in order to obtain high-quality metal zinc, improve current efficiency and reduce power consumption, it is necessary to purify and remove impurity ions Co, Ni, Sb, Cu and Cd in the electrolyte before electrolysis. Among them, the method of zinc powder replacement is generally used to remove Cu and Cd, and produce copper-cadmium slag containing a large amount of metal zinc. The main components of copper cadmium slag are Zn, Cd, Cu metal and other oxides, and also contain a small amount of impurities such as As, Sb, Fe, Co, Ni, etc. ...

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): C22B7/00C25C1/12C25C1/16
CPCY02P10/20
Inventor 李敦钫王成彦尹飞陈永强王念卫王军杨卜揭晓武杨永强郜伟阮书峰王忠
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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