CN110453072A - A method of extracting metallic tin from lead-acid accumulator - Google Patents
A method of extracting metallic tin from lead-acid accumulator Download PDFInfo
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- CN110453072A CN110453072A CN201910715498.2A CN201910715498A CN110453072A CN 110453072 A CN110453072 A CN 110453072A CN 201910715498 A CN201910715498 A CN 201910715498A CN 110453072 A CN110453072 A CN 110453072A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B25/00—Obtaining tin
- C22B25/02—Obtaining tin by dry processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B25/00—Obtaining tin
- C22B25/06—Obtaining tin from scrap, especially tin scrap
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
A method of metallic tin being extracted from lead-acid accumulator, cracking and sorting, oxygen-enriched side-blowing furnace including lead-acid accumulator are smelted；Regeneration lead bullion is removed the gred, after copper removal, sodium chloride, sodium nitrate and sodium hydroxide are added into lead liquid and after the reaction was completed pulls high tin ash out；High tin ash feeding rotary furnace is individually smelted, is tiny structure, the high tin-lead of output in smelting process furnace；High tin-lead is dissolved in alloy pot again, the small ingot of high tin-lead is cast after deslagging agent slagging-off, decoppering agent copper removal is added, the small ingot of high tin-lead is sent into vacuum refining workshop section, the separation of lead, tin is carried out using vacuum drying oven, output Theil indices are greater than 99.95% refined tin after repeatedly circulation refines.The present invention flows to characteristic according to metallic element during lead-acid accumulator recovery processing, and the metallic tin in refuse battery is extracted in the process flow of use, greatly reduce the loss of tin resource, realize the high efficiente callback of tin resource, simple production process is at low cost.
Description
Technical field
The invention belongs to nonferrous metallurgy technologies and industrial solid castoff application technology as the second resource field, and in particular to a kind of
The method of metallic tin is extracted from lead-acid accumulator.
Background technique
Lead-acid accumulator is mainly automobile starting battery, power battery, energy-storage battery, automobile starting class lead-acid accumulator
Service life is 2 ~ 5 years, the service life of power battery is 2 ~ 3 years, the service life of energy-storage battery is 3 ~ 6 years, is set when battery performance is not able to satisfy
When standby duty requirements, lead-acid accumulator, which will enter, scraps process.It is stored it is reported that scrapping plumbic acid there are about 600 ~ 7,000,000 tons every year
Battery.In recent years, with the support of national relevant policies and the appearance of lead-acid storage battery production, the related regulations of recycling, transhipment,
Lead-acid accumulator is gradually transferred to regular, qualified processing unit, and lead-acid accumulator recovery processing industry is also increasingly advised
Model.
The side of cracking and sorting, pyrometallurgical smelting is generallyd use in terms of the recovery processing technique of lead-acid accumulator, in industry
The recovery processing of formula progress lead-acid accumulator.In such a way that the lead plaster of cracking and sorting generation, lead bits are using pyrometallurgical smelting
Reason, can maximumlly recycle the metallic lead in lead-acid accumulator, the rate of recovery of lead can generally reach 99.8% or more.
The pole plate of lead-acid accumulator uses lead-calcium alloy, terne metal, and metal Theil indices reach 2 ~ 3% or so in pole plate.However, golden
It is different with the metallic character of lead to belong to tin, during being recycled lead-acid accumulator extraction lead, according to actual production process
The content of middle metallic tin calculates, and includes 1 ~ 4 ton of metallic tin, if do not recycled, it will cause resources in 100 tons of lead bullions of every production
Waste.For this purpose, be directed to the problem of tin resource during lead-acid accumulator recovery processing wastes, researched and developed it is a kind of from
The method of lead-acid accumulator extraction metallic tin.
Summary of the invention
To solve the problems, such as metallic tin resource loss during above-mentioned lead-acid accumulator recovery processing, the present invention proposes one kind
The method for extracting metallic tin from lead-acid accumulator, greatly reduces the loss of tin resource, realizes the high efficiente callback of tin resource.
Technical concept of the invention is: being directed in lead bullion of secondary lead smelting that metal Theil indices are lower, is unable to satisfy
Tin element, using tin process of enriching is mentioned, is enriched in Fe alloy slag during the refining of lead bullion by the cost-effectiveness requirement of vacuum drying oven refining
In.The high scruff that alloy proposes tin process of enriching output cannot be used directly for vacuum and propose tin smelting, using high scruff rotary furnace low temperature smelting
Tin element is maximumlly deposited in lead by sweetening process.Using the characteristic of metal different boiling under vacuum conditions, using vacuum
The mode of smelting extracts tin metal.
The technical problems to be solved by the invention are comprised the steps of: using following technical scheme
1) cracking and sorting, output the cracking and sorting of lead-acid accumulator: are carried out to lead-acid accumulator using cracking and sorting equipment
Lead-containing material lead plaster, lead bits；
2) oxygen-enriched side-blowing furnace is smelted: lead plaster, lead bits being sent into oxygen-enriched side-blowing furnace and smelted, output regenerates lead bullion；
3) it mentions tin process of enriching: regeneration lead bullion being sent into alloy kier, is removed the gred, after copper removal, the temperature of control lead liquid exists
380-450 DEG C, sodium chloride, sodium nitrate and sodium hydroxide are successively added into lead liquid, mixing time is 60 ~ 180 minutes, wherein plus
The shared regeneration lead bullion weight ratio of sodium chloride, sodium nitrate and the sodium hydroxide entered is respectively 0.02 ~ 0.04%, 0.01 ~ 0.02% He
0.1 ~ 0.2%, after the reaction was completed, high tin ash is pulled out, the high tin ash of output is yellow, particulate material, Theil indices 20% ~ 45%
In range；The chemical reaction equation being related to is as follows:
2NaNO3=Na2O+2.5O2+N2
5Sn+2NaNO3=Na2O+N2+5SnO
5Pb+2NaNO3=Na2O+N2+5PbO
5Sn+6NaOH+4NaNO3=5Na2SnO3+2N2+3H2O
Sn+2Na2PbO2+H2O=Na2SnO3+2NaOH+2Pb
Sn+2NaOH=Na2SnO2+H2
4) rotary furnace is smelted: centrally stored high tin ash being sent into rotary furnace and is individually smelted, control smelting temperature control is in 750-
850 DEG C, be tiny structure -10 ~ 20Pa in smelting process furnace, 3 ~ 5h of the duration of heat, and the high tin-lead of output is collected at rotary furnace cigarette ash circulation
Reason (this stanniferous rotary furnace cigarette ash is handled together with when the next rotary furnace high tin ash of processing)；
5) it cleans: high tin-lead being dissolved in alloy pot again, it is small to cast high tin-lead after the slagging-off of addition deslagging agent, decoppering agent copper removal
Ingot；
6) vacuum refining process: sending the small ingot of high tin-lead into vacuum refining workshop section, vacuum degree -20pa using vacuum drying oven carry out lead,
The separation of tin, controlling the temperature in vacuum drying oven is 1000 ~ 1336 DEG C；Repeatedly output Theil indices are greater than 99.95% after circulation refining
Refined tin.
Rotary furnace described in step 4) of the present invention is smelted slowly to be smelted using cryogenic seal tiny structure technique, the height of output
The small ingot Theil indices of tin-lead are 20 ~ 40%.
The rotary furnace cigarette ash collected in the smelting of rotary furnace described in step 4) of the present invention is added centrally stored high tin ash and send together
Enter rotary furnace individually to be smelted.
Vacuum refining process described in step 5) of the present invention, vacuum refining process carry out circulating vacuum three times using vacuum drying oven
Refinery practice.
Following table is boiling point of the different metal element when vacuum degree is 5Pa:
| Element | Sn | Pb | Bi | Sb | Ag |
| Boiling point t/oC | 1336 | 776 | 644.3 | 722 | 1092 |
Tin element is enriched in Fe alloy slag by the present invention using tin process of enriching is mentioned, and is boiled using metal is different under vacuum conditions
The characteristic of point, extracts tin metal by the way of vacuum metling, the extraction process of tin metal in the high tin-lead provided, obtained production
Product are the metallic tin and high antimony lead of 99.9% or more purity.
Compared with prior art, the present invention is special according to the flow direction of metallic element during lead-acid accumulator recovery processing
Property, the process flow of use extracts the metallic tin in refuse battery, greatly reduces the loss of tin resource, realize the height of tin resource
Effect recycling, economic benefit is obvious, and environment and social benefit are huge, and simple production process is at low cost.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific implementation method
Below with reference to embodiment and attached drawing, the present invention is further illustrated, but is not limited in any way the present invention
System, based on present invention teach that it is made it is any transform or replace, all belong to the scope of protection of the present invention.
Embodiment 1
1) cracking and sorting of lead-acid accumulator: according to process flow shown in Fig. 1, lead-acid accumulator is anticipated into use first after factory
Great Li Engitec company CX crushing system screening installation carries out cracking and sorting to lead-acid accumulator, separates PP, ABS plastic, produces
Lead-containing material lead plaster, lead bits out；
2) oxygen-enriched side-blowing furnace is smelted: by lead plaster, lead bits by oxygen-enriched side-blowing furnace feed proportioning system, auxiliary material equipped with iron ore, lime stone,
Anthracite is sent into oxygen-enriched side-blowing furnace using feed belt and is smelted, and output regenerates lead bullion, and regeneration lead bullion is examined by direct reading spectrometry
Surveying analysis Theil indices is 1.1%.Metallurgical slag is discharged, enters oxygen-enriched side-blowing furnace feed proportioning system after the cigarette ash granulation of oxygen-enriched side-blowing furnace；
3) it mentions tin process of enriching: the regeneration lead bullion of 60 tons of Theil indices 1.1% is sent into alloy kier, heating fusing, at 400 DEG C
Deslagging agent is added to remove the gred, after pulling dry slag out, reduces lead liquid temperature near 350 DEG C, decoppering agent is added and carries out copper removal.By copper
Element is removed to after 5ppm or less, be will heat up the temperature of control lead liquid at 450 DEG C or so, is separately added into sodium hydroxide into lead liquid
55kg, sodium chloride 11kg and sodium nitrate 5.5kg, mixing time are 60 minutes, and after the reaction was completed, sticky slag becomes yellow or dark
Slag is pulled out after yellow particle slag, which is high scruff, storage is installed with material box, the chemical reaction equation being related to is as follows:
2NaNO3=Na2O+2.5O2+N2
5Sn+2NaNO3=Na2O+N2+5SnO
5Pb+2NaNO3=Na2O+N2+5PbO
5Sn+6NaOH+4NaNO3=5Na2SnO3+2N2+3H2O
Sn+2Na2PbO2+H2O=Na2SnO3+2NaOH+2Pb
Sn+2NaOH=Na2SnO2+H2
After the completion of proposing tin enrichment, continue to produce metal operation in alloy pot.1 is shown in Table to the high tin ash testing result of output.
The content of metallic element in 1 tin ash of table
| Project | Cu | Sb | As | Sn | Pb |
| Content % | 0.18 | 0.98 | 6.85 | 27.23 | 40.15 |
4) rotary furnace is smelted: centrally stored high tin ash being sent into rotary furnace and is individually smelted, auxiliary material is furnished with 6% crushed coke, rotary furnace smelting
The temperature control of tin metallurgy ash is tiny structure -10 ~ 20Pa in 800 DEG C or so, smelting process furnace, carries out 3 ~ 5 using low temperature process
Hour slowly smelts, the high tin-lead of output, then high tin-lead is dissolved in alloy pot, casts small ingot after the operation that removes the gred, further right
The detection and analysis that high tin-lead carries out direct reading spectrometry the results are shown in Table 1.1, and Theil indices are 12.88%.It is another to collect rotary furnace clinker, cigarette ash
Row processing (this stanniferous cigarette ash is handled together with when the next rotary furnace high tin ash of processing).
The content of main metal element in the high tin-lead of table 1.1
| Project | Pb | Sn | Sb | Ni | Cu | As | Ag |
| Content % | 84.25 | 12.88 | 2.572 | 0.016 | 0.001 | 0.105 | 0.0004 |
5) vacuum refining process: sending the small ingot of high tin-lead into vacuum refining workshop section, using vacuum drying oven (vacuum refining market pot) into
The separation of quadrat, tin, tin is differed with the boiling point of lead at 600 DEG C or so in high tin lead materials.Vacuum drying oven refining utilizes metallic element
Metallic element under the conditions of vacuum condition 5Pa in the high tin-lead of differential separation of the metallic elements boiling point such as tin, lead, antimony, process benefit
It is 1080 DEG C with control vacuum drying oven DCS system strict control in-furnace temperature, is recycled according to the refining of vacuum drying oven shown in Fig. 1 process
Refining separation: being 1080 DEG C in in-furnace temperature, and vacuum degree -20Pa carries out first time vacuum refining, isolates primary high antimony lead, one
Secondary high tin-lead.Primary high tin-lead is entered back into vacuum drying oven, is 950 DEG C in in-furnace temperature, vacuum degree -20Pa carries out second of vacuum
Refining, isolates secondary high antimony lead, secondary high tin-lead.Secondary high tin-lead is entered back into vacuum drying oven, is 950 DEG C in in-furnace temperature,
Vacuum degree -20Pa carries out third time vacuum refining, isolates high-antimony low tin-lead, metallic tin three times.Primary high antimony lead, secondary high antimony
Lead is for preparing lead-antimony alloy.High-antimony low tin-lead enters first time vacuum refining three times.Final output is high antimony lead and metallic tin,
High antimony lead sends factory's alloy Workshop Production lead-antimony alloy back to, and the metallic tin purity of output is greater than 99.99%.
Embodiment 2
1) cracking and sorting of lead-acid accumulator: according to process flow shown in Fig. 1, lead-acid accumulator is anticipated into use first after factory
Great Li Engitec company CX crushing system screening installation to lead-acid accumulator carry out cracking and sorting, output lead-containing material lead plaster,
Lead bits；
2) oxygen-enriched side-blowing furnace is smelted: by lead plaster, lead bits by oxygen-enriched side-blowing furnace feed proportioning system, auxiliary material equipped with iron ore, lime stone,
Anthracite is sent into oxygen-enriched side-blowing furnace using feed belt and is smelted, and output regenerates lead bullion, and regeneration lead bullion is examined by direct reading spectrometry
Surveying analysis Theil indices is 1.5%；
3) it mentions tin process of enriching: the regeneration lead bullion of 60 tons of Theil indices 1.5% is sent into alloy kier, heating fusing, at 400 DEG C
Deslagging agent is added to remove the gred, after pulling dry slag out, reduces lead liquid temperature near 350 DEG C, decoppering agent is added and carries out copper removal.By copper
Element is removed to after 5ppm or less, be will heat up the temperature of control lead liquid at 450 DEG C or so, is separately added into sodium hydroxide into lead liquid
80kg, sodium chloride 15kg and sodium nitrate 7kg, mixing time are 100 minutes, and after the reaction was completed, sticky slag becomes yellow or dark
Slag is pulled out after yellow particle slag, which installs storage with material box,
After the completion of proposing tin enrichment, continue to produce metal operation in alloy pot.1 is shown in Table to the high tin ash testing result of output.
The content of metallic element in 1 tin ash of table
| Project | Cu | Sb | As | Sn | Pb |
| Content % | 0.16 | 0.97 | 5.85 | 27.41 | 40.92 |
4) rotary furnace is smelted: centrally stored high tin ash being sent into rotary furnace and is individually smelted, auxiliary material is furnished with 6% crushed coke, rotary furnace smelting
The temperature control of tin metallurgy ash is tiny structure -10 ~ 20Pa in 800 DEG C or so, smelting process furnace, is carried out using low temperature process slow
Smelt, the high tin-lead of output, then high tin-lead is dissolved in alloy pot, cast small ingot after the operation that removes the gred, further to high tin-lead into
The detection and analysis of row direct reading spectrometry the results are shown in Table 1.1, and Theil indices are 13.01%.Collect rotary furnace clinker, cigarette ash otherwise processed (this
Stanniferous rotary furnace cigarette ash is handled together with when the next rotary furnace high tin ash of processing).
The content of main metal element in the high tin-lead of table 1.1
| Project | Pb | Sn | Sb | Ni | Cu | As | Ag |
| Content % | 82.83 | 13.01 | 3.25 | 0.034 | 0.004 | 0.505 | 0.0002 |
5) vacuum refining process: being sent the small ingot of high tin-lead into vacuum refining workshop section, the separation of lead, tin carried out using vacuum drying oven, high
Tin is differed with the boiling point of lead at 600 DEG C or so in tin lead materials.Vacuum drying oven refining is using metallic element in vacuum condition 5Pa condition
Metallic element in the high tin-lead of differential separation of the metallic elements boiling points such as lower tin, lead, antimony, process utilize control vacuum drying oven DCS system
Strict control in-furnace temperature of uniting is 1100 DEG C, recycles refining process three times according to vacuum drying oven shown in Fig. 1 and carries out circulation refining separation,
Final output is high antimony lead and metallic tin, and high antimony lead sends factory's alloy Workshop Production lead-antimony alloy back to, and the metallic tin of output is pure
Degree is greater than 99.99%.
Embodiment 3
A method of metallic tin being extracted from lead-acid accumulator, comprising the following steps:
1) cracking and sorting of lead-acid accumulator: according to process flow shown in attached drawing 1, lead-acid accumulator into using after factory first
Italian Engitec company CX crushing system screening installation carries out cracking and sorting, output lead-containing material lead to lead-acid accumulator
Cream, lead bits；
2) oxygen-enriched side-blowing furnace is smelted: by lead plaster, lead bits by oxygen-enriched side-blowing furnace feed proportioning system, auxiliary material equipped with iron ore, lime stone,
Anthracite is sent into oxygen-enriched side-blowing furnace using feed belt and is smelted, and output regenerates lead bullion, and regeneration lead bullion is examined by direct reading spectrometry
Surveying analysis Theil indices is 1.8%；
3) it mentions tin process of enriching: the regeneration lead bullion of 120 tons of Theil indices 1.8% is sent into alloy kier, heating fusing, at 400 DEG C
Deslagging agent is added to remove the gred, after pulling dry slag out, reduces lead liquid temperature near 350 DEG C, decoppering agent is added and carries out copper removal.By copper
Element is removed to after 5ppm or less, be will heat up the temperature of control lead liquid at 450 DEG C or so, is separately added into sodium hydroxide into lead liquid
110kg, sodium chloride 22kg and sodium nitrate 10kg, mixing time be 150 minutes, after the reaction was completed, sticky slag become yellow or
Slag is pulled out after dark yellow coloured particles slag, which installs storage with material box
After the completion of proposing tin enrichment, continue to produce metal operation in alloy pot.1 is shown in Table to the high tin ash testing result of output.
The content of metallic element in 1 tin ash of table
| Project | Cu | Sb | As | Sn | Pb |
| Content % | 0.415 | 0.4 | 8.9 | 37.24 | 21.58 |
4) rotary furnace is smelted: centrally stored high tin ash being sent into rotary furnace and is individually smelted, auxiliary material is furnished with 6% crushed coke, rotary furnace smelting
The temperature control of tin metallurgy ash is tiny structure -10 ~ 20Pa in 800 DEG C or so, smelting process furnace, is carried out using low temperature process slow
Smelt, the high tin-lead of output, then high tin-lead is dissolved in alloy pot, cast small ingot after the operation that removes the gred, further to high tin-lead into
The detection and analysis of row direct reading spectrometry the results are shown in Table 1.1, and Theil indices are 15.6%.Collect rotary furnace clinker, cigarette ash otherwise processed.
The content of main metal element in the high tin-lead of table 1.1
| Project | Pb | Sn | Sb | Ni | Cu | As | Ag |
| Content % | 78.62 | 15.6 | 3.55 | 0.03 | 0.005 | 1.79 | 0.0005 |
5) vacuum refining process: being sent the small ingot of high tin-lead into vacuum refining workshop section, the separation of lead, tin carried out using vacuum drying oven, high
Tin is differed with the boiling point of lead at 600 DEG C or so in tin lead materials.Vacuum drying oven refining is using metallic element in vacuum condition 5Pa condition
Metallic element in the high tin-lead of differential separation of the metallic elements boiling points such as lower tin, lead, antimony, process utilize control vacuum drying oven DCS system
Strict control in-furnace temperature of uniting is 1090 DEG C, recycles refining process three times according to vacuum drying oven shown in Fig. 1 and carries out circulation refining separation,
Final output is high antimony lead and metallic tin, and high antimony lead sends factory's alloy Workshop Production lead-antimony alloy back to, and the metallic tin of output is pure
Degree is greater than 99.99%.
Have been shown and described above basic principles and main features of the invention and it is of the invention a little.The technology of the industry
For personnel it should be appreciated that the present invention is not limited to the above embodiments, that looks familiar in above embodiments and description only illustrates this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also have various transformation and improvement, these changes
Change and improvement is both fallen in the scope of the invention.
Claims (4)
1. a kind of method for extracting metallic tin from lead-acid accumulator, it is characterised in that comprise the steps of:
1) cracking and sorting, output the cracking and sorting of lead-acid accumulator: are carried out to lead-acid accumulator using cracking and sorting equipment
Lead-containing material lead plaster, lead bits；
2) oxygen-enriched side-blowing furnace is smelted: lead plaster, lead bits being sent into oxygen-enriched side-blowing furnace and smelted, output regenerates lead bullion；
3) it mentions tin process of enriching: regeneration lead bullion being sent into alloy kier, is removed the gred, after copper removal, the temperature of control lead liquid exists
380-450 DEG C, sodium chloride, sodium nitrate and sodium hydroxide are successively added into lead liquid, mixing time is 60 ~ 180 minutes, wherein
The shared regeneration lead bullion weight ratio of sodium chloride, sodium nitrate and the sodium hydroxide of addition is respectively 0.02 ~ 0.04%, 0.01 ~ 0.02%
With 0.1 ~ 0.2%, after the reaction was completed, high tin ash to be pulled out, the high tin ash of output is yellow, particulate material, Theil indices 20% ~
In 45% range；
4) rotary furnace is smelted: centrally stored high tin ash being sent into rotary furnace and is individually smelted, control smelting temperature control is in 750-
850 DEG C, be tiny structure -10 ~ 20Pa in smelting process furnace, 3 ~ 5h of the duration of heat, and the high tin-lead of output is collected at rotary furnace cigarette ash circulation
Reason；
5) it cleans: high tin-lead being dissolved in alloy pot again, it is small to cast high tin-lead after the slagging-off of addition deslagging agent, decoppering agent copper removal
Ingot,
6) vacuum refining process: sending the small ingot of high tin-lead into vacuum refining workshop section, vacuum degree -20pa using vacuum drying oven carry out lead,
The separation of tin, controlling the temperature in vacuum drying oven is 1000 ~ 1336 DEG C；Repeatedly output Theil indices are greater than 99.95% after circulation refining
Refined tin.
2. a kind of method for extracting metallic tin from lead-acid accumulator according to claim 1, it is characterised in that step
4) rotary furnace described in is smelted slowly to be smelted using cryogenic seal tiny structure technique, and the small ingot Theil indices of the high tin-lead of output are 20
~40%。
3. a kind of method for extracting metallic tin from lead-acid accumulator according to claim 1, it is characterised in that step
4) the collection rotary furnace cigarette ash circular treatment are as follows: centrally stored high tin ash is added together in the rotary furnace cigarette ash collected in rotary furnace smelting
Rotary furnace is sent into be smelted.
4. a kind of method for extracting metallic tin from lead-acid accumulator according to claim 1, it is characterised in that step
5) vacuum refining process described in, vacuum refining process carry out circulating vacuum refinery practice three times using vacuum drying oven.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111321301A (en) * | 2020-04-15 | 2020-06-23 | 云南锡业股份有限公司铜业分公司 | System and method for efficiently recovering valuable metals in tin secondary raw materials |
| CN111500877A (en) * | 2020-06-10 | 2020-08-07 | 广东汉合有色金属有限公司 | Process method for recovering and regenerating refined tin from tin foil ash of tin foil sacrificial offerings |
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