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Method and device for treating daub and iron-rich heavy metal solid waste of waste lead-acid storage battery

A technology of waste lead-acid batteries and heavy metals, which is applied in the direction of improving process efficiency, etc., can solve the hidden dangers of heavy metal pollution, the continuous cleaning and smelting of waste lead-acid battery clay, iron-rich heavy metal solid waste, idle waste of resources and other problems, to achieve elimination Effects of gas pollution, clean and efficient recycling, and low cost

Inactive Publication Date: 2013-03-13
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there are no mature and reliable treatment methods at home and abroad, and most of them are stored on the spot, which not only causes a lot of idle waste of resources, but also becomes a major hidden danger of heavy metal pollution
[0004] So far, there are no reports on the continuous cleaning and smelting of waste lead-acid battery cement and the harmless disposal of iron-rich heavy metal solid waste.

Method used

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  • Method and device for treating daub and iron-rich heavy metal solid waste of waste lead-acid storage battery
  • Method and device for treating daub and iron-rich heavy metal solid waste of waste lead-acid storage battery
  • Method and device for treating daub and iron-rich heavy metal solid waste of waste lead-acid storage battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The smelting of embodiment 1 cement A

[0059] Take 400t of cement A, 110t of pyrite slag A, and 16t of limestone to prepare 526t of charge, and its main components (%) are: Pb43.22, S4.02, FeO11.62, SiO 2 5.06, CaO2.53. Then mix and granulate in batches in the mixer, and then add 130t of reduced coal, then add the dry pellets and reduced coal continuously into 2M 2 In the oxygen-enriched side-blowing furnace, the cross-sectional area of ​​the tuyere area of ​​the side-blowing furnace is 2m 2 ,; Melting temperature 1050 ℃ ~ 1300 ℃, wind pressure 3.0 ~ 5.0 atmospheres, air volume 200 ~ 400m 3 / min, oxygen concentration 40~60%, slag temperature 1150℃; continuous smelting for 5 days and 2 hours, total output:

[0060] Crude lead 210.3t, containing Pb 98%, lead yield 90.65%;

[0061] Soot 35.4t, containing Pb 41.22%, lead recovery rate 97.07%;

[0062] Water-quenched slag 125t, containing Pb 1.55%, S 1.59%, FeO 37.72%, SiO 2 29.37%, CaO 11.37%;

[0063] Iron matte 8...

Embodiment 2

[0065] The smelting of embodiment 2 cement B

[0066] Take 400t of cement B, 160t of pyrite slag B, and 16t of limestone to prepare 576t of charge. The main components (%) are: Pb50.30, S5.48, FeO15.80, SiO 2 6.44, CaO2.25, and then mixed in batches in the mixer and granulated, and then added 150t of reduced coal, and then added the dry pellets and reduced coal continuously into 2M 2 In the oxygen-enriched side-blowing furnace, the cross-sectional area of ​​the tuyere area of ​​the side-blowing furnace is 2m 2 , Melting temperature 1050℃~1250℃, wind pressure 2~5 atmospheres, air volume 200~450m 3 / min, oxygen concentration 35~60%, continuous smelting for 6 days, total output:

[0067] Crude lead 265.7t, containing Pb 97.67%, lead yield 89.56%;

[0068] Soot 44t, containing Pb 47.65%, lead recovery rate 96.79%;

[0069] Water-quenched slag 105t, containing Pb 1.72%, S 2.51%, FeO 35.71%, SiO 2 29.06%, CaO 12.13%;

[0070] Iron matte 122t, containing Pb 6.13%, S 23.50%, Fe...

Embodiment 3

[0072] The smelting of embodiment 3 cement C

[0073] Take 400t of cement C, 110t of kiln slag magnetic separation iron slag, and 16t of limestone, and prepare 526t of charge. The main components (%) are: Pb49.70, S4.55, FeO15.67, SiO 2 5.17, CaO2.12. Then mix and granulate in batches in the mixer, and then add 130t of reduced coal, then add the dry pellets and reduced coal continuously into 2M 2 In the oxygen-enriched side-blowing furnace, the cross-sectional area of ​​the tuyere area of ​​the side-blowing furnace is 2m 2 , Melting temperature 1050℃~1300℃, wind pressure 4.2~4.5 atmospheres, air volume 250~340m 3 / min, oxygen concentration 40~60%, slag temperature 1150℃; continuous smelting for 6 days, total output:

[0074] Crude lead 243.5t, containing Pb 97.77%, lead yield 91.08%;

[0075] Soot 34t, containing Pb 47.35%, lead recovery rate 97.23%;

[0076] Water-quenched slag 98t, containing Pb 1.95%, S 0.68%, FeO 32.84%, SiO 2 26.35%, CaO 10.29%;

[0077] Iron matt...

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Abstract

The invention discloses a reduction sulphur-fixing method and device for treating daub and iron-rich heavy metal solid waste of a waste lead-acid storage battery. The method comprises the steps of: with iron-rich heavy metal solid waste as a sulphur-fixing agent and smokeless conny as a reducing agent, firstly, fully uniformly mixing raw materials such as daub of the waste lead-acid storage battery with the sulphur-fixing agent and a solvent, drying and pelleting, then continuously adding the mixture and the reducing agent (fuel) into an oxygen side-blowing bath smelting furnace for reduction sulphur-fixing smelting, further producing lead bullion, iron sulphur and sulphur-containing slag in one step under the condition that no sulfur dioxide is generated. According to the method, sulphur in the raw materials is fixed in the sulphur-containing slag and iron sulphur, so that low-concentration sulfur dioxide pollution is thoroughly eliminated, valuable elements such as iron, gold, silver, tin, antimony and bismuth in the sulphur-fixing agent are recycled with high efficiency at low cost, and continuous cleaning smelting of the daub of the waste lead-acid storage battery and continuous harmless treatment of the iron-rich heavy metal solid waste are realized. The reduction sulphur-fixing method has the advantages of changing harmful substances into beneficial substances, recycling waste materials, and being simple in process, environmentally friendly, and low in cost, and has important significance for continuous clean smelting of the daub of the waste lead-acid storage battery and the treatment and recycling of the heavy metal solid waste.

Description

technical field [0001] The invention relates to a method and equipment for treating waste lead-acid battery putty and iron-rich heavy metal solid waste, in particular to a method and equipment for treating waste lead-acid battery putty and iron-rich heavy metal solid waste in a reduction sulfur melting pool; It belongs to the technical field of comprehensive utilization of secondary resources and industrial solid waste treatment. Background technique [0002] my country is the world's largest lead producer and also the world's largest producer of lead-acid batteries. It produces more than 2 million tons of waste lead-acid battery mortar every year, which is the main source of raw materials for waste lead-acid battery mortar. In addition to entering the lead smelting system with lead sulfide concentrate, most of the waste lead-acid battery cement is processed by waste lead-acid battery cement production enterprises, using wet desulfurization conversion-reduction smelting proce...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B13/00C22B5/10
CPCY02P10/20
Inventor 唐朝波张铭发陈永明胡奔流唐谟堂王玮杨声海刘庆华何静杨建广
Owner CENT SOUTH UNIV
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