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

Method for directly preparing metal lead from lead-containing material through solid phase reaction

A technology of solid phase reaction and metal lead, applied in the field of hydrometallurgy, can solve the problems of limited raw material processing capacity, occupying a large amount of land resources, high power consumption cost, etc., and achieve the effect of low reagent cost, simple process flow and easy operation

Active Publication Date: 2019-08-09
UNIV OF SCI & TECH BEIJING
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the pyrometallurgical method, although the hydrometallurgical method has certain advantages in terms of environment and energy consumption, it also has the problem of long process flow. Some leaching reagents such as fluosilicic acid and citric acid are relatively expensive, and due to The solubility of lead in the solution is low, which leads to a large liquid-solid ratio in the leaching process, which limits the processing capacity of raw materials. At the same time, a large number of reactors and solution storage tanks are required, which takes up a lot of land resources.
In addition, the electrodeposition method also has the problem of high power consumption cost.

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 directly preparing metal lead from lead-containing material through solid phase reaction
  • Method for directly preparing metal lead from lead-containing material through solid phase reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Solid phase reaction: 1kg of lead paste (Pb 70.8%), the amount of zinc powder is 1.0 times the theoretical amount, the reaction equipment is a stirring mill, the weight ratio of ball to material is 2:1, and the ratio of water to material is 0.3:1 (m 3 / t), add sulfuric acid to control the reaction pH3.0, the reaction time is 0.2h, and the lead conversion rate reaches 98.8%.

[0041] Solid-liquid separation: Wash and filter the solid-phase reaction product to obtain metallic lead and zinc sulfate solutions.

[0042] Metal lead melting and casting: the melting and casting temperature is 600°C, the amount of coal is 2.5%, and the obtained crude lead contains 99.1% lead. Crystallization: crystallize the zinc sulfate solution to obtain the zinc sulfate product.

Embodiment 2

[0044] Solid phase reaction: 1kg of lead paste (Pb 70.8%), the amount of zinc particles is 1.0 times the theoretical amount, the reaction equipment is a ball mill, the weight ratio of ball to material is 12:1, and the ratio of water to material is 1:1 (m 3 / t), add sulfuric acid to control the reaction pH to 4.0, the reaction time is 1h, and the lead conversion rate reaches 97.8%.

[0045] Solid-liquid separation: Wash and filter the solid-phase reaction product to obtain metallic lead and zinc sulfate solutions.

[0046] Metal lead melting and casting: the melting and casting temperature is 600°C, the coal consumption is 2.5%, and the crude lead obtained contains 98.1% lead. Crystallization: crystallize the zinc sulfate solution to obtain the zinc sulfate product.

Embodiment 3

[0048] Solid phase reaction: 1kg of lead paste (Pb 70.8%), the amount of iron filings is 1.0 times the theoretical amount, the reaction equipment is a stirring mill, the weight ratio of ball to material is 10:1, and the ratio of water to material is 0.5:1 (m 3 / t), add sulfuric acid to control the reaction pH to 3.0, the reaction time is 1h, and the lead conversion rate reaches 97.6%.

[0049] Solid-liquid separation: wash and filter the solid-phase reaction product to obtain metallic lead and ferrous sulfate solution.

[0050] Metal lead melting and casting: the melting and casting temperature is 570°C, the amount of coal is 2%, and the obtained crude lead contains 98.9% lead. Crystallization: Crystallize the ferrous sulfate solution to obtain the ferrous sulfate product.

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 provides a method for directly preparing metal lead from a lead-containing material through solid phase reaction. The method comprises the following steps: 1, adding the lead-containingmaterial to be treated into a grinding machine, adding a metal substance and water into the grinding machine, and directly carrying out solid-phase reaction on the lead-containing material and the metal substance by using the grinding machine under the action of mechanical force to obtain a reaction product, specifically, the activity of the metal substance is greater than that of lead; 2, washingand filtering the reaction product to obtain metal lead and a metal salt solution corresponding to the metal substance; and 3, carrying out fusion casting on the metal lead to obtain coarse lead, andcrystallizing the metal salt solution to obtain the metal salt corresponding to the metal substance. Compared with the existing processes for treating lead-containing materials by a fire method and awet method, the method for preparing the metal lead has the characteristics of short flow, few procedures, large treatment capacity, low energy consumption cost and the like, and can meet the environmental protection requirements of clean production.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for directly preparing metallic lead from lead-containing materials through solid-phase reaction. Background technique [0002] At present, the utilization of secondary lead resources has been paid more and more attention. The technology of desulfurization conversion + pyro-reduction smelting has been applied to the recycling of waste lead-acid battery lead paste with high lead content, but the pyrometallurgical process of processing lead paste has high energy consumption costs, and will produce sulfur dioxide, volatile lead dust and other atmospheric gases. pollutants. In addition, various types of lead sulfate slag, lead chloride slag, and lead oxide slag are produced in the smelting process of non-ferrous metals. The quantity is huge, but due to the relatively low lead content (20-60%), they have not been effectively utilized yet. [0003] In view of the env...

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): C22B7/00C22B13/00
CPCC22B7/00C22B13/00Y02P10/20C22B13/045C22B13/04C22B3/08C22B3/46C22B3/10C22B3/22C22B7/007
Inventor 王成彦张文娟邢鹏车键勇马保中陈永强
Owner UNIV OF SCI & TECH BEIJING
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