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

Method for recycling lead from lead-containing waste material

A technology for waste and lead oxide, applied in the field of lead recovery, can solve the problems such as the inability to recycle sulfuric acid and sodium carbonate, aggravate the consumption of fluorosilicic acid, and the high cost of citric acid, and achieve elimination of secondary pollution, zero consumption, and production cost savings Effect

Active Publication Date: 2020-03-03
BEIJING UNIV OF CHEM TECH
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (2) The silicon dioxide contained in the lead-containing flue ash will also have a side reaction with fluosilicic acid, thereby intensifying the consumption of fluosilicic acid;
[0007] (3) Sulfuric acid and sodium carbonate used in the reaction process cannot be recycled. For every 1 mol of lead oxide produced, theoretically at least 1 mol of sulfuric acid and 1 mol of sodium carbonate should be consumed, while 1 mol of sodium sulfate and 1 mol of carbon dioxide should be discharged.
[0009] In addition, the Yang Jiakuan research group of Huazhong University of Science and Technology recently tried to recycle lead-containing waste with citric acid and hydrogen peroxide. The main problem of this method is the high cost and pollution caused by the high-temperature roasting consumption of citric acid during the recycling process.
Pan Junqing's research group at Beijing University of Chemical Technology tried to use sodium hydroxide solution to realize the dissolution and recrystallization process of lead oxide-containing waste. Experimental studies have shown that this method is very superior to lead oxide-containing waste directly converted from a single type of lead-acid battery. Recycling, but for the complex composition of waste lead-acid battery lead paste and flue ash mixed with multiple varieties, especially lead oxide waste containing 10-30% silicon-aluminum composite oxide, alumina and silica , tin dioxide, etc. have significant dissolution and consumption in alkaline sodium hydroxide solution

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

Embodiment 1

[0044] Lead-containing waste from a lead-acid battery factory in Zhejiang was selected.

[0045] A method of recovering lead from lead-containing waste, specifically as follows:

[0046] Step 1: Put the leaded waste into the muffle furnace and 2 or under the protection of inert gas under the condition of 600 DEG C for 0.5h, the main component is the roasted lead paste of lead oxide and lead sulfate; through physical and chemical determination, the lead oxide containing 95wt% is contained in the roasted lead paste, and the remainder is a small amount lead sulfate and clay;

[0047] Step 2: Add the above-mentioned 1kg calcined lead paste into a 10L reactor, and add 5.5L of lead perchlorate+0.8mol / L imidazole-5-alpha-alanine at a concentration of 0.4mol / L to the reactor. Mixture A, then heat the reactor to 60°C, and continue to stir for 1h, with a stirring rate of 300r / min; to completely dissolve the lead oxide in the roasted lead paste; perform solid-liquid separation after th...

Embodiment 2

[0053] Lead-containing waste from a lead-acid battery factory in Zhejiang was selected.

[0054] A method of recovering lead from lead-containing waste, specifically as follows:

[0055] Step 1: Put the leaded waste into the muffle furnace and 2 or under the protection of inert gas under the condition of 600 DEG C for 0.5h, the main component is the roasted lead paste of lead oxide and lead sulfate; through physical and chemical determination, the lead oxide containing 95wt% is contained in the roasted lead paste, and the remainder is a small amount lead sulfate and clay;

[0056] Step 2: Add 1 kg of the above-mentioned roasted lead paste into a 2L reactor, add 1L of a conjugated solution containing 10mol / L ammonia and 2.0mol / L ammonium sulfate in the reactor as complexing agent B, and then heat the reactor to 50°C, and continuously stirred for 0.5h, with a stirring rate of 380r / min; the lead sulfate in the roasted lead paste was completely dissolved; after the reaction, the...

Embodiment 3

[0064] Lead-containing waste from a lead-acid battery factory in Zhejiang was selected.

[0065] A method of recovering lead from lead-containing waste, specifically as follows:

[0066] Step 1: Put the leaded waste into the muffle furnace and 2 Or under the protection of an inert gas, roast 0.5h under the condition of 600 ℃ to obtain the roasted lead paste whose main components are lead sulfate and lead oxide; through physical and chemical determination, the lead sulfate of 90wt% is contained in the roasted lead paste, and 9.5wt% lead oxide and remaining 0.5wt% impurities;

[0067] Step 2: Add 1 kg of the above-mentioned roasted lead paste into a 2L reaction kettle, add 0.95L lead perchlorate with a concentration of 0.4mol / L into the reaction kettle as complexing agent A, then heat the reaction kettle to 60°C, and continuously Stirring for 0.5h, the stirring rate is 300r / min; the lead oxide in the roasted lead paste is completely dissolved; after the reaction, solid-liquid ...

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 method for recycling lead from a lead-containing waste material. The method comprises the following steps of: (1) making the lead-containing waste material and a complexing agent water solution react to make sure that lead oxide and / or lead sulfate in the lead-containing waste material are / is completely dissolved, and separating a lead-ion-containing liquid supernatant from the precipitates containing no lead salt after reaction is ended; (2) making the liquid supernatant and a precipitant react so that the lead ions in the liquid supernatant are completely precipitated, and separating the lead-salt-containing precipitates from a regenerated complexing water solution after reaction is ended; and (3) making the lead-salt-containing precipitates and an electrolyte Awater solution have dissolution reaction to make sure that the lead-salt-containing precipitates are completely dissolved and a lead-containing electrolyte B and a precipitant are generated after reaction is ended, recycling the precipitant, and making the lead-containing electrolyte B have electrolytic reaction to obtain metallic lead, oxygen and a regenerated electrolyte A. according to the method disclosed by the invention, the complexing agent, the precipitant and the electrolyte A used in a recycling process can be repeated recycled; the method satisfies the characteristics of atomic economic reaction, so the method realizes zero consumption and zero emission and lowers the production cost.

Description

technical field [0001] The invention relates to a method for recycling waste. More particularly, it relates to a method of recovering lead from lead-containing waste. Background technique [0002] Since the invention of lead-acid batteries by French engineer Plante in 1859, lead-acid batteries have dominated the secondary battery market, especially the car starter and electric bicycle markets for a long time due to their low price, wide operating temperature range and outstanding stability. Location. According to battery statistics, the total consumption of refined lead in China in 2012 exceeded 4.646 million tons, of which the consumption of lead-acid batteries was 3.3 million tons, accounting for about 71% of the total lead consumption. Due to the rapid development of my country's automobile consumption, it can be predicted that for a long period of time in the future, it will still face the problems of continuous growth of lead consumption and increasingly scarce lead r...

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): C22B13/00C22B7/00C25C1/18
CPCC22B7/006C22B13/045C25C1/18Y02P10/20
Inventor 潘军青张轩孙艳芝
Owner BEIJING UNIV OF CHEM TECH
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