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Technological method for producing lead-calcium rare earth alloy based on waste lead grid mesh of waste lead-acid batteries

A technology of waste lead-acid batteries and rare earth alloys, which is applied in battery recycling, process efficiency improvement, waste collector recycling, etc. It can solve the problems of not being able to use metal tin in waste lead grids, etc., and achieve good reaction effect and simple operation , The effect of simple process

Active Publication Date: 2018-10-23
JIANGSU NEW CHUNXING RESOURCE RECYCLING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a process for producing lead-calcium rare earth alloys based on waste lead grids of waste lead-acid batteries, so as to solve the problem that metal tin in the waste lead grids cannot be utilized in the prior art no matter whether oxidation refining or alkaline refining is adopted. question

Method used

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  • Technological method for producing lead-calcium rare earth alloy based on waste lead grid mesh of waste lead-acid batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: The waste lead grid is melted at 420±20°C in the melting pot, and the lead liquid is pumped into the copper removal pot with a lead pump after the ash is removed, and the sampling spectrum is analyzed. The composition: Sb 0.112%, As 0.0072%, Sn 0.61 %, Cu 0.011%, Bi 0.0038%, Ag0.00068%, Pb balance; heat up to 500±20°C, add sulfur and pyrite powder mixture to remove copper, of which weight percentage, sulfur 13%, pyrite powder 87%, sampling direct reading spectroscopic analysis, the composition is as follows: Sb 0.098%, As 0.0069%, Sn 0.595%, Cu 0.0005%, Bi 0.0038%, Ag 0.00069%, Pb balance.

[0038] After the ash and slag are crushed, the copper and lead liquid is pumped into the refining pot with a lead pump.

[0039] Raise the temperature of the copper and lead removal solution in the refining pot to 560±20°C, calculate the amount of antimony, arsenic and tin retention agent used as 1.3 times the total amount of antimony and arsenic, turn on the mixer, stir th...

Embodiment 2

[0043] Example 2: The waste lead grid is melted in the melting pot at 410±20°C. After the ash is removed, the lead liquid is pumped into the copper removal pot with a lead pump, and the sampling spectrum is analyzed. The composition: Sb 0.152%, As 0.011%, Sn 0.70 %, Cu 0.008%, Bi 0.0037%, Ag0.00068%, Pb balance; heating up to 480±20°C, adding pyrite powder to remove copper, sampling direct reading spectral analysis, the composition is as follows: Sb 0.150%, As 0.011 %, Sn 0.70%, Cu 0.0005%, Bi 0.0037%, Ag 0.00068%, Pb balance.

[0044] After the ash and slag are crushed, the copper and lead liquid is pumped into the refining pot with a lead pump.

[0045] Raise the temperature of the copper and lead removal solution in the refining pot to 570±20°C, calculate the amount of antimony, arsenic and tin retention agent used as 1.2 times the total amount of antimony and arsenic, turn on the mixer, stir the lead solution to generate a vortex, and the input speed should not affect the ...

Embodiment 3

[0050] Example 3: The waste lead grid is melted in the melting pot at 380±20°C, and the lead liquid is pumped into the copper removal pot with a lead pump after the ash is removed, and the sampling spectrum is analyzed. The composition: Sb 0.085%, As 0.011%, Sn 0.51 %, Cu 0.008%, Bi 0.004%, Ag0.00078%, Pb balance; cool down to 360±20°C, add red phosphorus to remove copper, sample direct reading spectrum analysis, the composition is as follows: Sb0.083%, As 0.011%, Sn 0.492%, Cu 0.0005%, Bi 0.004%, Ag 0.00078%, Pb balance;

[0051] After the ash and slag are crushed, the copper and lead liquid is pumped into the refining pot with a lead pump.

[0052] Raise the temperature of the copper and lead removal solution in the refining pot to 570±20°C, calculate the amount of antimony, arsenic and tin retention agent used as 1.5 times the total amount of antimony and arsenic, turn on the mixer, stir the lead solution to produce a vortex, and the input speed should not affect the vortex...

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Abstract

The invention relates to a technological method for producing lead-calcium rare earth alloy based on waste lead grid mesh of waste lead-acid batteries, and belongs to the field of comprehensive recycling of waste lead-acid batteries. The technological method comprises the following steps: melting waste lead grid mesh at a low temperature in a smelting pot while controlling the melting temperatureat 350-500 DEG C, adding ash slag, adding a copper removal agent to remove copper and obtain a copper-lead liquid; heating the copper-lead liquid to 580-650 DEG C, adding an antimony-arsenic removal tin-retaining agent to remove antimony and arsenic and obtain a tin-containing lead liquid, and then purifying the tin-containing lead liquid, and adding tin-calcium-aluminum rare earth RE to prepare the lead-calcium rare earth RE alloy. The lead-calcium rare earth alloy produced has basically the same tensile strength, density, hardness and corrosion resistance as a lead-based alloy prepared by the original electrolytic lead, and meets the requirements for the use of a battery grid alloy. Advantages: The process is simple, the operation is convenient, the production efficiency is high, the valuable metallic tin in the waste lead grid mesh is effectively utilized, the production cost of the lead alloy preparation is reduced, the antimony-arsenic removal reaction process is smokeless and odorless, and the work environment is good.

Description

technical field [0001] The invention relates to the field of comprehensive recycling of waste lead-acid batteries, in particular to a process method for producing lead-calcium rare earth alloys based on waste lead grids of waste lead-acid batteries. Background technique [0002] The lead-acid battery grid is the most important inactive substance in the battery. It acts as an important carrier of active substances, plays the role of conducting and collecting current, and makes the current evenly distributed on the active substances. Lead-antimony alloy has always been the most important material for grids. With the emergence of maintenance-free lead-acid batteries, lead-antimony alloys can no longer meet the performance requirements of battery maintenance-free, and are gradually replaced by lead-calcium alloys. At present, the most widely used is Lead-calcium-tin-aluminum grid alloy, the study found that the lead-calcium-tin-aluminum grid alloy has excellent maintenance-free ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B7/00C22B13/02C22C1/03C22C11/06
CPCC22B7/001C22B13/025C22C1/03C22C11/06H01M10/54Y02P10/20Y02W30/84
Inventor 杨春明
Owner JIANGSU NEW CHUNXING RESOURCE RECYCLING CO LTD
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