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Low-temperature continuous smelting technology for obtaining secondary lead

A secondary lead and low-temperature technology, which is applied in the field of low-temperature continuous smelting of secondary lead, can solve the problems of high energy consumption and low smelting efficiency, and achieve the effects of low energy consumption, stable product quality and simple process methods

Active Publication Date: 2017-09-08
ANHUI HUAXIN LEAD IND GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional smelting equipment consumes a lot of energy and has low smelting efficiency

Method used

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  • Low-temperature continuous smelting technology for obtaining secondary lead
  • Low-temperature continuous smelting technology for obtaining secondary lead
  • Low-temperature continuous smelting technology for obtaining secondary lead

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A low-temperature continuous smelting process for secondary lead, comprising the following steps:

[0028] (1) Crushing waste lead-acid batteries, collecting lead paste and lead grids for use, wherein the lead content in waste lead-acid batteries is about 30% in lead paste, and about 34% in lead grids;

[0029] (2) Put the lead paste into the heating equipment. In a vacuum environment, the heating temperature is controlled at 100°C-110°C, the thickness of the lead paste is 1cm-2cm, and the heating time does not exceed 60 minutes. After completion, immediately carry out pre-desulfurization treatment;

[0030] The heat treatment can improve the desulfurization effect of the lead plaster, and the desulfurized lead plaster dissolves quickly in water, making it easy to wash with water.

[0031] (3) Wash the pre-desulfurized lead paste and dry it, then put it into a low-temperature melting furnace together with the lead grid, and control the melting temperature at 400°C-500°C...

Embodiment 2

[0034] A low-temperature continuous smelting process for secondary lead, comprising the following steps:

[0035] (1) Crushing waste lead-acid batteries, collecting lead paste and lead grids for use, wherein the lead content in waste lead-acid batteries is about 30% in lead paste, and about 34% in lead grids;

[0036] (2) Put the lead paste into the heating equipment. In a vacuum environment, the heating temperature is controlled at 100°C-110°C, the thickness of the lead paste is 1cm-2cm, and the heating time does not exceed 60 minutes. After completion, immediately carry out pre-desulfurization treatment;

[0037] The heat treatment can improve the desulfurization effect of the lead plaster, and the desulfurized lead plaster dissolves quickly in water, making it easy to wash with water.

[0038] (3) Wash the pre-desulfurized lead paste and dry it, then put it into a low-temperature melting furnace together with the lead grid, and control the melting temperature at 400°C-500°C...

Embodiment 3

[0043] A low-temperature continuous smelting process for secondary lead, comprising the following steps:

[0044] (1) Crushing waste lead-acid batteries, collecting lead paste and lead grids for use, wherein the lead content in waste lead-acid batteries is about 30% in lead paste, and about 34% in lead grids;

[0045] (2) Put the lead paste into the heating equipment. In a vacuum environment, the heating temperature is controlled at 100°C-110°C, the thickness of the lead paste is 1cm-2cm, and the heating time does not exceed 60 minutes. After completion, immediately carry out pre-desulfurization treatment;

[0046] The heat treatment can improve the desulfurization effect of the lead plaster, and the desulfurized lead plaster dissolves quickly in water, making it easy to wash with water.

[0047] (3) Wash the pre-desulfurized lead paste and dry it, then put it into a low-temperature melting furnace together with the lead grid, and control the melting temperature at 400°C-500°C...

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Abstract

The invention discloses a low-temperature continuous smelting technology for obtaining secondary lead. The technology comprises the following steps that (1) waste lead-acid storage batteries are crushed to collect lead plaster and lead grids for stand-by; (2) the lead plaster is placed in heating equipment, under a vacuum environment, the heating temperature is controlled within 100 DEG C-110 DEG C, the thickness of the lead plaster is 1 cm-2 cm, the heating time is not longer than 60 minutes, and pre-desulfurization treatment is conducted immediately after heating is completed; (3) the lead plaster after being subjected to pre-desulfurization is dried after being washed with water, and then put into a low temperature smelting furnace together with the lead grids, and the smelting temperature is controlled within 400 DEG C-500 DEG C; and (4) molten lead obtained through smelting is transported to a pouring system, lead ingots are obtained through pouring the molten lead, and refined lead can be obtained after refining is conducted.

Description

technical field [0001] The invention relates to the technical field of resource regeneration, in particular to a low-temperature continuous smelting process for recycled lead. Background technique [0002] At present, there are nearly 300 domestic recycled lead factories, but not many of them have a scale of tens of thousands of tons, and the average production capacity of small factories is about 1,000 tons per year. Domestic secondary lead manufacturers have small production scale and low technical level. Most manufacturers use small reverberatory furnaces for smelting, and some small enterprises and self-employed people even use primitive earthen furnaces and earthen kilns for smelting. The specific smelting method is: mix lead metal and lead slag ash into the kiln for smelting, a large amount of lead metal that can be melted at low temperature and cast lead slag are smelted at high temperature together, bituminous coal is used as fuel in the smelting process, anthracite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/02H01M10/54
CPCY02W30/84C22B13/025H01M10/54
Inventor 孙峰
Owner ANHUI HUAXIN LEAD IND GROUP