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Reduction sulfur-fixing bath smelting method and device of low-sulfur lead-containing secondary material and iron-rich heavy metal solid waste

A melting pool smelting and heavy metal technology, which is applied in the comprehensive utilization of secondary resources and industrial solid waste treatment, can solve the problems of continuous clean smelting iron-rich heavy metal solid waste, waste of idle resources, heavy metal pollution, etc., and achieve the elimination of gas pollution , clean and efficient recycling, environmentally friendly cost effect

Inactive Publication Date: 2013-03-13
CENT SOUTH UNIV
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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 for the above-mentioned high-speed rail industrial solid waste, and most of them are piled up 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 clean smelting of low-sulfur lead-containing secondary materials and the harmless disposal of iron-rich heavy metal solid waste.

Method used

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  • Reduction sulfur-fixing bath smelting method and device of low-sulfur lead-containing secondary material and iron-rich heavy metal solid waste
  • Reduction sulfur-fixing bath smelting method and device of low-sulfur lead-containing secondary material and iron-rich heavy metal solid waste
  • Reduction sulfur-fixing bath smelting method and device of low-sulfur lead-containing secondary material and iron-rich heavy metal solid waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1 Furnace charge smelting with 2% sulfur content

[0057] Take 100t of lead soot A, 40t of lead sulfate slag B, 120t of local oxidized lead ore B, 227t of Baoshan oxidized lead ore and 13t of limestone, and prepare 500t of charge. The main components (%) are: Pb 19.30, S 1.98, FeO 23.93, SiO 2 15.23, CaO5.83, Ag 82.96g / t. Then mix and granulate in batches in the mixer, and then add 125t 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 ;Smelting 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 4 days, total output:

[0058] Crude lead 77.50t, containing Pb 96%, Ag 380g / t, lead yield 77.98%;

[0059] Soot 42.93t, containing Pb 35.42%, lead recovery rate 92.86%;

[0060] Water-quenched...

Embodiment 2

[0063] Example 2 Furnace charge smelting with 4% sulfur content

[0064] Take 230t of lead soot B, 200t of lead sulfate slag A, 410t of local lead oxide ore C, 40t of waste battery smelting slag and 20t of limestone to prepare 900t of charge. The main components (%) are: Pb 30.15, S 4.00, FeO 26.85, SiO 2 13.34, CaO5.03, and then mix and granulate in batches in the mixer, and then add 225t 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 , The melting temperature is 1050℃~1250℃, the wind pressure is 3~4 atmospheres, and the air volume is 200~350m 3 / min, oxygen concentration 40-60%, continuous smelting for 8 days and 10 hours, total output:

[0065] Crude lead 243.8t, containing Pb 95.67%, lead yield 85.95%;

[0066] Soot 62t, containing Pb 38.45%, lead recovery rate 94.73%;

[0067] Water-quenched slag 362t, co...

Embodiment 36

[0070] The charge smelting of embodiment 36% sulfur content

[0071] Take lead soot A 180t, lead mud A 180t, local oxidized lead ore A 220t, pyrite slag A 15t and limestone 5t, and prepare 600t charge, the main components (%) are: Pb 32.15, S 6.00, FeO 22.34 , SiO 2 5.17, CaO 2.02, Ag 55.4g / t. Then mix and granulate in batches in the mixer, and then add 150t 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 4 days, total output:

[0072] Crude lead 172.4t, containing Pb 95.68%, lead yield 86.86%;

[0073] Soot 38t, containing Pb 37.56%, lead recovery rate 92.93%;

[0074] Water-quenched slag 264t, containing Pb 1.95%, S 0.68%, FeO 32.84%, S...

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Abstract

The invention discloses a reduction sulfur-fixing bath smelting method and device of a low-sulfur lead-containing secondary material and iron-rich heavy metal solid waste. The reduction sulfur-fixing bath smelting 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 the low-sulfur lead-containing secondary material with the sulphur-fixing agent and a solvent, drying and pelleting, then continuously adding a mixed pelleted material and the reducing coal (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 low-sulfur lead-containing secondary material and continuous harmless treatment of the iron-rich heavy metal solid waste are realized. The reduction sulphur-fixing bath smelting method has the advantages of changing harmful substances into beneficial substances, recycling waste materials, and being simple in process, environmental-friendly, and low in cost, and has important significance for continuous clean smelting of the low-sulfur lead-containing secondary material and the treatment and recycling of the heavy metal solid waste.

Description

technical field [0001] The invention discloses a method and equipment for reducing and solidifying molten pool smelting of low-sulfur lead-containing secondary materials and iron-rich heavy metal solid waste; in particular, it relates to a continuous cleaning treatment of low-sulfur lead-containing secondary materials and harmless disposal of rich A method and equipment for iron and heavy metal solid waste belong to the technical fields 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 lead-acid battery producer. It produces more than 2 million tons of waste lead-acid battery cement every year, which is the main source of low-sulfur lead-containing secondary materials. A small part is combined with lead sulfide concentrate to enter the lead smelting system, and most of them adopt the wet desulfurization conversion-reduction smelti...

Claims

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Application Information

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IPC IPC(8): C22B7/00
CPCY02P10/20
Inventor 唐朝波陈永明唐谟堂杨声海何静杨建广
Owner CENT SOUTH UNIV
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