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Low-energy-consumption, quick and recyclable lead paste desulfurization mother liquid desalinating process

A technology with low energy consumption and mother liquor, applied in the desalination process of recyclable lead paste desulfurization mother liquor, fast and low energy consumption, can solve the problems of low efficiency and complicated desalination process, and achieve low equipment and plant costs, fast desalination speed, and green The effect of efficient recycling

Inactive Publication Date: 2017-02-01
ANHUI NARADA RENEWABLE RESOURCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The desulfurized mother liquor after desulfurization needs to be desalted, but the desalination process in the prior art is relatively complicated and the efficiency is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A low energy consumption, fast, recyclable lead plaster desulfurization mother liquor desalination process, comprising the following process steps:

[0020] (1) Collect the waste lead paste produced in the dismantling of waste lead-acid batteries. According to the difference in the sulfur content of the waste lead paste, add water to the waste lead paste in a reaction kettle capable of forming strong convection to form a slurry with a solid content of 50%. ;

[0021] (2) Add Na in the slurry of step (1) 2 CO 3 , where Na 2 CO 3 The amount added is 1.3-1.4 times the theoretical amount, and the process does not require heating;

[0022] (3) After starting the reactor and stirring continuously for 30 minutes, put the ore slurry into a device with strong impact, extrusion and friction for reaction, and apply PbSO 4 Surface PbCO 3 layer is turned on so that the PbSO 4 in solution with Na 2 CO 3 Full contact, thereby improving the desulfurization efficiency and achie...

Embodiment 2

[0027] A low energy consumption, fast, recyclable lead plaster desulfurization mother liquor desalination process, comprising the following process steps:

[0028] (1) Collect the waste lead paste produced in the dismantling of waste lead-acid batteries. According to the difference in the sulfur content of the waste lead paste, add water to the waste lead paste in a reaction kettle capable of forming strong convection to form a slurry with a solid content of 50%. ;

[0029] (2) Add Na in the slurry of step (1) 2 CO 3 , where Na 2 CO 3 The amount added is 1.3-1.4 times the theoretical amount, and the process does not require heating;

[0030] (3) After starting the reactor and stirring continuously for 30 minutes, put the ore slurry into a device with strong impact, extrusion and friction for reaction, and apply PbSO 4 Surface PbCO 3 layer is turned on so that the PbSO 4 in solution with Na 2 CO 3 Full contact, thereby improving the desulfurization efficiency and achie...

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PUM

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Abstract

A low-energy-consumption, quick and recyclable lead paste desulfurization mother liquid desalinating process includes the steps of: 1) collecting the waste lead paste from detachment of waste and used lead acid batteries, and according to difference of sulfur content of the waste lead paste, adding water to the waste lead paste in a reaction kettle, in which strong convection can be formed, to prepare ore slurry being 50% in solid content; 2) adding Na2CO3 to the ore slurry with addition quantity of the Na2CO3 being 1.3-1.4 times as theoretical quantity, wherein the addition process is free of heating; 3) starting the reaction kettle to continuously stir the ore slurry for 30 min, and feeding the ore slurry into a device having strong collision, extrusion and friction effects to perform a reaction, wherein a PbCO3 layer coating the surface of PbSO4 during a desulfurization process is broken, so that the PbSO4 is fully contact with the Na2CO3 in the solution; and 4) after the reaction for 20 min, performing solid liquid separation to the reaction product to obtain desulfurization mother liquid and desulfurization lead paste; and 5) pumping the desulfurization mother liquid into a crystallizer, adding a certain amount of a crystallization accelerant, discharging the mother liquid after 30 min and performing solid liquid separation so as to removal by-product salt from the desulfurization mother liquid.

Description

technical field [0001] The invention relates to the technical field of regenerated lead, in particular to a low-energy, fast and recyclable desalination process for lead paste desulfurization mother liquor. Background technique [0002] Despite the continuous development of various new battery technologies today, the lead-acid battery with a history of more than 150 years is still in the secondary market due to its excellent cost performance, stable electrochemical performance, mature production technology and high recycling of waste products. occupy the first place in the secondary battery market. The continuous growth of annual output not only represents the importance of lead-acid batteries to human beings, but also means that a large amount of lead is consumed in lead-acid battery products every year. [0003] As a major consumer product in the world, lead-acid batteries have also become the most important lead renewable resources. More than 80% of the main raw materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B13/00
CPCC22B7/006C22B13/045
Inventor 吴国庆朱保义任永刚陈华勇
Owner ANHUI NARADA RENEWABLE RESOURCE TECH CO LTD
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