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Method for strengthening wet desulphurization of waste lead paste by adopting microwave-ultrasound-stirring

A technology for wet desulfurization and waste lead paste is applied in the direction of improving process efficiency, which can solve the problems of low desulfurization rate and low desulfurization efficiency, and achieve the effects of high desulfurization rate, thorough desulfurization process and speeding up reaction speed.

Inactive Publication Date: 2019-11-22
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method of using microwave-ultrasonic-stirring to strengthen the wet desulfurization of waste lead plaster, so as to solve the problems of low desulfurization efficiency and low desulfurization rate in the desulfurization process of waste lead plaster in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In this embodiment, microwave-ultrasonic-stirring is used to strengthen the method of wet desulfurization of waste lead plaster, and the specific steps are:

[0041] (1) Dry, grind and screen the waste lead paste produced by the crushing and sorting system, and control the particle size below 100 mesh.

[0042] (2) Weigh 0.5 t of waste lead plaster treated in step (1) and put it into a desulfurization tank, add 3 t of sodium citrate aqueous solution with a mass percentage of 35%, and mix well.

[0043] (3) Move the desulfurization tank containing waste lead plaster and desulfurizer to the microwave process for microwave heating, set the microwave heating power to 400W, and the heating time to 6min.

[0044] (4) The ultrasonic generator is started, and the mixed material obtained in step (3) is subjected to ultrasonic enhanced desulfurization, the ultrasonic power is 800W, and the ultrasonic time is 15 minutes.

[0045] (5) Start the stirrer, stir the mixed material obt...

Embodiment 2

[0049] In this embodiment, microwave-ultrasonic-stirring is used to strengthen the method of wet desulfurization of waste lead plaster, and the specific steps are:

[0050] (1) Dry, grind and screen the waste lead paste produced by the crushing and sorting system, and control the particle size below 100 mesh.

[0051] (2) Weigh 0.8 t of waste lead plaster treated in step (1) and put it into a desulfurization tank, add 5.6 t of sodium citrate aqueous solution with a mass fraction of 45%, and mix well.

[0052] (3) Move the desulfurization tank containing waste lead plaster and desulfurizer to the microwave process for microwave heating, set the microwave heating power to 750W, and the heating time to 8min.

[0053] (4) The ultrasonic generator is started, and the mixed material obtained in step (3) is subjected to ultrasonic enhanced desulfurization, the ultrasonic power is 1200W, and the ultrasonic time is 18 minutes.

[0054] (5) Start the stirrer, stir the mixed material ob...

Embodiment 3

[0058] In this embodiment, microwave-ultrasonic-stirring is used to strengthen the method of wet desulfurization of waste lead plaster, and the specific steps are:

[0059] (1) Dry, grind and screen the waste lead paste produced by the crushing and sorting system, and control the particle size below 100 mesh.

[0060] (2) Weigh 0.8 t of waste lead plaster treated in step (1) and put it into a desulfurization tank, add 6.4 t of sodium citrate aqueous solution with a mass fraction of 55%, and mix well.

[0061] (3) Move the desulfurization tank containing waste lead plaster and desulfurizer to the microwave process for microwave heating, set the microwave heating power to 1100W, and the heating time to 10min.

[0062] (4) The ultrasonic generator is started, and the mixed material obtained in step (3) is subjected to ultrasonic enhanced desulfurization, the ultrasonic power is 1600W, and the ultrasonic time is 20 minutes.

[0063] (5) Start the stirrer, stir the mixed material ...

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Abstract

The invention belongs to the field of waste lead acid accumulator resource regeneration, and in particular, discloses a method for strengthening wet desulphurization of waste lead paste by adopting microwave-ultrasound-stirring. The waste lead paste is uniformly mixed with desulphurization agents to obtain mixtures A; the mixtures A are heated by microwaves, so that the waste lead paste and the desulphurization agents are reacted to obtain mixtures B; the mixtures B are desulphurized by adopting ultrasonic waves to obtain mixtures C; the mixtures C are stirred for reaction to obtain mixtures D; and the mixtures D are filtered and separated to obtain desulphurized lead paste with lower sulfur content. The whole lead paste desulphurization process is simple in operation, easy to control andlow in energy consumption. The desulphurization process is more thorough; and the desulphurization rate is high. The sulfur content of the obtained lead paste is lower than 0.35% to meet subsequent lead oxide preparation requirements. The method solves the problems of low desulphurization efficiency and low desulphurization rate in the waste lead paste desulphurization process in the prior art, and meanwhile, has the characteristics of high treatment efficiency, environmental protection and high lead resource recovery rate.

Description

technical field [0001] The invention belongs to the field of resource regeneration of waste lead-acid batteries, and is used for desulfurization of lead paste in the regeneration process of waste lead-acid batteries, specifically a method for strengthening wet desulfurization of waste lead paste by using microwave-ultrasonic-stirring. Background technique [0002] In recent years, with the continuous increase in the number of cars and electric bicycles and the continuous expansion of the demand for lead-acid batteries in energy storage and other fields, the amount of scrapped lead-acid batteries in my country has increased rapidly. Scrapped batteries are not only a serious waste of resources, but also pose a greater threat to the ecological environment and human health. How to realize the recycling of used lead-acid batteries is of great practical significance. Lead paste, as the main component separated from waste lead-acid batteries, has always been the focus and difficult...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B9/02C22B13/06
CPCC22B7/006C22B9/02C22B9/023C22B9/026C22B13/045C22B13/06Y02P10/20
Inventor 邢相栋莫川庞焯刚李林波王莎杜月利郑建潞
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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