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System and method for waste lead storage battery desulfurization lead plaster integrated roasting and smelting

A waste lead battery and desulfurization lead paste technology, applied in the field of recycled lead, can solve the problems of unfavorable reduction reaction, unfavorable efficient utilization of heat energy, and influence on the local temperature of the molten liquid, etc., so as to reduce refining energy consumption, high heat energy utilization, The effect of simplifying the refining process

Active Publication Date: 2017-12-15
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of direct reduction smelting, the decomposition reaction that occurs first in the smelting process of lead carbonate materials is an endothermic reaction, and the carbon dioxide produced by the decomposition will also take away heat, which will affect the local temperature of the molten liquid, which is not conducive to the efficient reduction reaction; The segmented process of smelting after conversion to PbO increases the number of procedures, which is not conducive to the efficient use of heat energy

Method used

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  • System and method for waste lead storage battery desulfurization lead plaster integrated roasting and smelting
  • System and method for waste lead storage battery desulfurization lead plaster integrated roasting and smelting
  • System and method for waste lead storage battery desulfurization lead plaster integrated roasting and smelting

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Embodiment 1

[0020] An integrated roasting and smelting system for desulfurization of lead paste in waste lead storage batteries. The system includes a cylindrical molten pool, which is divided into a rough smelting pool 9 and a pre-refining smelting pool 10 by a cylindrical partition plate 6. A number of through holes 14 are provided at the lower part of the shaped partition plate 6, and the bottoms of the rough smelting pool 9 and the pre-refining bath 10 are provided with a number of air jet nozzles 15. The sides of the pre-refining bath 10 are arranged from top to bottom There is a lead slag outlet 12 and a lead liquid outlet 13, the top of the pre-refining bath 10 is provided with a flue 3, the flue 3 is provided with a dry roasting reaction tower 1, and the top of the dry roasting reaction tower 1 is provided with a first A feeding port 2, the dry roasting reaction tower 1 is provided with a number of inclined plates 5, the top of the pre-refining molten pool 10 is provided with a seco...

Embodiment 2

[0023] The integrated roasting and smelting method of desulfurization lead paste for waste lead storage batteries is characterized in that a silicate slagging agent and coke are added to the rough smelting pool 9 and the pre-refining smelting pool 10, and the mixed fuel is sprayed through the jet nozzle 15 to make the two The internal temperature of the desulfurization paste is increased to 700~800℃, and then desulfurization lead paste, iron filings, anthracite and sodium carbonate are injected from the first feeding port 2. The desulfurization lead paste is decomposed into PbO through the drying and roasting reaction tower 1, and then dropped into the coarse smelting tank 9 And the reduction reaction with coke occurs, and the lead droplets precipitated out after reduction accumulate, and CO 2 It reacts with C to generate CO, which promotes the intense reduction of PbO; when the temperature of the molten pool continues to rise to 800-900°C, all the charge is completely melted, th...

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Abstract

The invention provides a system and method for integrated roasting and smelting of waste lead battery desulfurization lead paste. The system includes a cylindrical melting pool, which is divided into a rough melting pool and a pre-refining melting pool by a cylindrical partition plate. The lower part of the dividing plate is provided with a through hole, the bottom of the rough smelting pool and the pre-refining molten pool are provided with air nozzles, the side of the pre-refining molten pool is provided with a lead slag outlet and a lead liquid outlet from top to bottom, and the top of the pre-refining molten pool is There is a flue, and a drying and roasting reaction tower is installed inside the flue. The top of the drying and roasting reaction tower is provided with a first feeding port, and the top of the pre-refining molten pool is provided with a second feeding port. The drying and roasting reaction tower and the rough melting pool pass through the filter block The rough smelting pool is connected with the flue through several first flue openings, and the pre-refining melting pool is connected with the flue through several second flue openings. The integrated roasting and smelting system for desulfurization and lead paste of waste lead storage batteries designed by the invention has the advantages of simple material operation process and high utilization of heat energy.

Description

Technical field [0001] The invention belongs to the technical field of regenerated lead, and specifically relates to a system and method for integrated roasting and smelting of waste lead storage battery desulfurization lead paste. Background technique [0002] The existing pyrometallurgical lead smelting technology uses lead ore as raw material, and uses various advanced furnaces for lead reduction smelting. The reduction smelting using waste lead storage battery desulfurization lead paste as raw material generally adjusts the composition of the smelting agent and the process parameters of lead smelting according to the lead content and grade, but the lead smelting equipment has not been improved accordingly. In particular, for the smelting of the lead paste raw material whose main component is lead carbonate after desulfurization, a direct smelting or a staged smelting process is generally used. In the direct reduction smelting process, the decomposition reaction that occurs f...

Claims

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Application Information

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IPC IPC(8): C22B13/02H01M10/54
CPCY02W30/84C22B13/025H01M10/54
Inventor 高云芳夏云川蔡良泼万火军徐新娄可柏
Owner ZHEJIANG UNIV OF TECH
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