CN108300864B - A kind of energy-saving hair lead refining process - Google Patents

A kind of energy-saving hair lead refining process Download PDF

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Publication number
CN108300864B
CN108300864B CN201810335385.5A CN201810335385A CN108300864B CN 108300864 B CN108300864 B CN 108300864B CN 201810335385 A CN201810335385 A CN 201810335385A CN 108300864 B CN108300864 B CN 108300864B
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lead
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revolving burner
temperature
revolving
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CN108300864A (en
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张家福
王玮
李亚非
常传杰
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Tian Neng Group (puyang) Renewable Resources Co Ltd
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Tian Neng Group (puyang) Renewable Resources Co Ltd
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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
    • 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
    • C22B13/00—Obtaining lead
    • C22B13/02—Obtaining lead by dry processes
    • C22B13/025—Recovery from waste materials
    • 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
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16—Remelting metals
    • 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

Abstract

The invention belongs to the waste material smelting reducing technologies in lead-acid storage battery production, and in particular to energy-saving hair lead refining process.A kind of energy-saving hair lead refining process, applied to lead skim generated during lead-acid storage battery production, the recycling of lead dirt, includes the following steps: to make auxiliary material, calculated by the weight percent for accounting for waste material to be processed and select coke 1%-2%, iron filings 0.5%-3%, sodium carbonate 0.1%-1%；Auxiliary material is added, lead skim, electrolysis lead skim waste material are mixed and put together, the auxiliary material that above-mentioned steps make is sprinkling upon on the mixed lead skim waste material put；Thick refining, is added in revolving burner, keeps revolving burner rotation；Refining, spins up speed, and revolving burner rotation makes tin and lead gradually melt fusion；Refining continues to improve temperature melting；Cooling ingot casting, temperature is reduced, and revolving burner stops rotating, and lead ingot casting is put in heat preservation.The present invention uses low temperature refining process, saves the useful element in material to the full extent, allows to be recycled.

Description

A kind of energy-saving hair lead refining process
Technical field
The invention belongs to the waste material smelting reducing technologies in lead-acid storage battery production, and in particular to energy-saving hair lead refines work Skill.
Background technique
Lead storage battery manufacturing technology has 150 years so far, the wide range of applications of battery.In recent years, electric vehicle Performance, lower storage space requirement and outstanding price advantage preferably ride instead of walk with it in China's fast development, has benefited from this, Battery industry is also rapidly developed, because lead-acid accumulator has the advantages that circular economy, so find broad application, It can be to become to produce raw material again, be exactly me after focusing on lead-acid accumulator service life by decomposing, refining Described Reducing Lead.Generated waste material also becomes raw material Reducing Lead, resource regeneration by smelting again in production process.
Regenerated resources converter procedure is that all productions relate to a kind of critical process that scrap lead is converted into Reducing Lead, in melting Scrap lead (lead powder, positive plate lead skim, negative plate lead skim, useless pole group, dirty, grey, the environmentally friendly powder of alloy of lead etc.) will be related to be mixed and melt Refining refines output Reducing Lead through high temperature.
In-furnace temperature is up to 1000-1300 DEG C or so when mixed smelting, and because the fusing point of copper is 1083 DEG C, antimon point is 630 DEG C, lead fusing point is 327.5 DEG C, and tin fusing point is 231.9 DEG C, and after melting 240 minutes, lead, tin, is shaved etc. and to be combined together copper, Output Reducing Lead after high melt, tin, copper, antimony, etc. indexs do not meet the negative plate alloy requirement of configuration.Reducing Lead is again introduced into molten Lead furnace configures lead bullion, and tin, copper, antimony etc. are removed, and configures lead bullion, increasing labour cost, energy consumption, auxiliary material takes and the time, and alkaline residue is worked as Waste product is taken out, and major product lead bullion then adds the configuration alloy such as tin slab again.
Authorization Notice No. is the Chinese invention patent of CN105803205A, discloses a kind of energy-efficient secondary lead smelting work Skill, processing step are: lead-acid accumulator being disassembled automatically and is isolated and after the lead plaster and flux ingredient that carbonate, is sent into rich Melting is carried out in oxygen smelting furnace, produces lead bullion, lead skim and low concentration SO2 fume；The flue gas of SO2 is recycled through waste heat and the dress that gathers dust It sets and send desulphurization system desulfurization qualified discharge after gathering dust；Lead skim is sold to cement plant for the general waste of vitrifying and does raw material；Lead bullion is logical Electrorefining is crossed to obtain selling outside lead bullion and the earth of positive pole；The system for realizing the technique includes side blowing smelting furnace, apparatus for feeding, slag Water quenching equipment, cooling equipment, dust collection device and desulphurization plant.It is improved by technological design and system, realizes Pb, Ag, Cu, The clean and effective of Sb, Sn element recycles.
Authorization Notice No. is the Chinese utility model patent of CN105648233A, discloses a kind of secondary lead smelting reduction side Method belongs to lead smelting reducing method.Its method is as follows: 1, Weighing feeder weighs lead plaster containing scrap lead, anthracite or coke, oxygen Change iron powder；Wherein anthracite or coke and lead plaster weight ratio containing scrap lead 2-20%, brown iron oxide and lead plaster weight containing scrap lead Compare 2-20%；2, mixing is carried out containing scrap lead, anthracite or coke, brown iron oxide by lead plaster of the batch mixer to weighing, obtained Mixture；3, mixture is delivered to granulator and pelletizes, then partial size 10-50mm is sent through belt conveyor to top filling Case is transported material in smelting furnace by the screw(-type) feeder for the lower box part that feeds and is smelted；4, furnace temperature is adjusted to 900- Brown iron oxide is reduced into metallic iron, metal by control smelting temperature, speed, reducing atmosphere by 1500 DEG C of progress reducing and smeltings Iron participates in the reduction melting reaction of lead.Use brown iron oxide that iron filings is replaced as reducing agent to significantly reduce production cost, with compared with Good economic benefit and social benefit.
Authorization Notice No. is the Chinese patent of CN104087761A, discloses a kind of secondary lead smelting method, including will give up Lead storage battery is crushed, pre- desulfurization, sorts to obtain lead plaster, and the lead plaster enters the melting of lead plaster smelting furnace after dry kiln is dry, generates Flue gas handled to obtain exhaust gas, while the exhaust gas returns and is used as drying source in dry kiln.Advantages of the present invention is the smelting side Method makees the dry heat source of lead plaster through waste heat hot waste gas after the recovery using lead plaster smelting furnace and lead grid smelting furnace, conducive to the molten of lead plaster Refining reaction, improves production efficiency, reduces energy consumption；The high-temperature flue gas generated in lead plaster smelting furnace and lead grid smelting furnace is through handling Obtained flue dust returns in lead plaster smelting furnace, realizes refuse reclamation, meanwhile, the smelting slag of lead grid melting generation, refining generate Refining slag also all return lead plaster smelting furnace handled；A whole set of processing system direct yield is high, comprehensive energy consumption is low, and pollution is few, Realize distributing rationally for efficient resource.
But the existing scrap lead that relates to has following defects that 1, mixed smelting temperature is high, produces when by smelting reducing Lead in Reducing Lead out, tin, copper, antimony, etc. indexs do not meet the standard of lead storage battery production alloyage lead, it is necessary to pass through Cross ingot casting it is cooling after go to another workshop and be again introduced into molten lead furnace configuration lead bullion, by the removings such as tin, copper, antimony again ingot casting it is cooling send to Alloy processing workshop；2, it is electrolysed lead skim, the 1000-1300 DEG C of melting of lead skim of positive/negative plate alloy, increases liquid oxygen and combustion gas consumption etc., Cause energy waste；3, it cannot be made full use of without the tin ingredient in the positive/negative plate alloy lead skim by pollution, in copper removal The tin of its a large amount contained is also removed away in the process, then needs to add tin again when alloyage, causes serious waste, by inspection It surveys waste Theil indices and reaches 0.35--0.8%.
Summary of the invention
It is an object of the invention to provide a kind of energy-saving hair lead refining process aiming at the problems existing in the prior art, make Refining hair lead is recycled with the technique, the raw material finished product lead bullion for making the product of output become can be used directly reduces primary melt And primary cooling procedure, cancel twice production link, energy consumption saves 33.3%, solves energy consumption and wastes big, contained beneficial metal The problem of cannot reusing.
The technical scheme is that
A kind of energy-saving hair lead refining process, dirty applied to lead skim generated during lead-acid storage battery production, lead Recycling, includes the following steps:
(1) auxiliary material is made, is calculated by the weight percent for accounting for waste material to be processed and selects coke 1%---2%, iron filings 0.5%---3%, sodium carbonate 0.1%---1%；
(2) auxiliary material is added, the lead skim being cast by waste and old positive plate, negative plate, electrolysis lead skim waste material are mixed and put together, it will The auxiliary material of above-mentioned steps production is sprinkling upon on the mixed lead skim waste material put, and stock is completed after uniform stirring；
(3) thick refining, the waste material to be processed made in previous step is added in revolving burner, and control in-furnace temperature is 350-400 DEG C, first static revolving burner 15--25 minutes, then start revolving burner, holding revolving speed is 4--6 minutes every circles, keeps rotation Converter rotates 20--60 minutes；
(4) it refines, temperature is promoted to 550-600 DEG C, spin up speed, holding revolving speed is 2--5 minutes every circles, rotation Converter rotates 5--20 minutes, and tin and lead is made gradually to melt fusion；
(5) it refines, continues to improve temperature to 700-880 DEG C, 1--2 minutes every circles of revolving burner revolving speed, melting 10--40 divides Clock；
(6) cooling ingot casting, cools the temperature to 500--650 DEG C, and revolving burner stops rotating, and keeps the temperature 20--40 minutes, puts lead casting Ingot.
Specifically, a kind of energy-saving hair lead refining process, includes the following steps:
(1) auxiliary material is made, is calculated by the weight percent for accounting for waste material to be processed and selects coke 1.2%---1.8%, iron filings 1%---2%, sodium carbonate 0.3%---0.8%；
(2) auxiliary material is added, the lead skim being cast by waste and old positive plate, negative plate, electrolysis lead skim waste material are mixed and put together, it will The auxiliary material of above-mentioned steps production is sprinkling upon on the mixed lead skim waste material put, and stock is completed after uniform stirring；
(3) thick refining, the waste material to be processed made in previous step is added in revolving burner, and control in-furnace temperature is 320-460 DEG C, first static revolving burner 15--25 minutes, then start revolving burner, holding revolving speed is 5 minutes every circles, keeps rotation Furnace rotates 30--50 minutes；
(4) it refines, temperature is promoted to 550-600 DEG C, spin up speed, holding revolving speed is 2.5 minutes every circles, rotation Furnace rotates 10--15 minutes, and tin and lead is made gradually to melt fusion；
(5) it refines, continues to improve temperature to 770-800 DEG C, 2 minutes every circles of revolving burner revolving speed, melting 20--30 minutes；
(6) cooling ingot casting, cools the temperature to 550--600 DEG C, and revolving burner stops rotating, and keeps the temperature 25--35 minutes, puts lead casting Ingot.
Specifically, energy-saving hair lead refining process, includes the following steps:
(1) auxiliary material is made, is calculated by the weight percent for accounting for waste material to be processed and selects coke 1.5%, iron filings 1.3%, carbon Sour sodium 0.3%；
(2) auxiliary material is added, the lead skim being cast by waste and old positive plate, negative plate, electrolysis lead skim waste material are mixed and put together, it will The auxiliary material of above-mentioned steps production is sprinkling upon on the mixed lead skim waste material put, and stock is completed after uniform stirring；
(3) thick refining, the waste material to be processed made in previous step is added in revolving burner, and control in-furnace temperature is 400 DEG C, first static revolving burner 20 minutes, then starts revolving burner, and holding revolving speed is 5 minutes every circles, keeps revolving burner rotation 40 Minute；
(4) it refines, temperature is promoted to 600 DEG C, spin up speed, holding revolving speed is 2.5 minutes every circles, revolving burner rotation Turn 10 minutes, tin and lead is made gradually to melt fusion；
(5) it refines, continues to improve temperature to 800 DEG C, 2 minutes every circles of revolving burner revolving speed, melting 30 minutes；
(6) cooling ingot casting, cools the temperature to 600 DEG C, and revolving burner stops rotating, and keeps the temperature 30 minutes, puts lead ingot casting.
The beneficial effects of the present invention are: the present invention uses low temperature refining process, having in material is saved to the full extent With element, allow to be recycled, save twice production process, reduces primary thawing and primary cooling procedure, energy saving 33.3%, can save tin waste every year is about 16.1 tons.Reach lead-acid accumulator by the refined lead product of multiple authentication Grid casting alloy standard.
Specific embodiment
Embodiment 1
A kind of energy-saving hair lead refining process, dirty applied to lead skim generated during lead-acid storage battery production, lead Recycling, includes the following steps:
(1) auxiliary material is made, is calculated by the weight percent for accounting for waste material to be processed and selects coke 1.5%, iron filings 1.3%, carbon Sour sodium 0.3%, coke serve combustion-supporting, and iron filings are to help the separation of various impurity, and the effect of sodium carbonate is to neutralize pH value；
(2) auxiliary material is added, the lead skim being cast by waste and old positive plate, negative plate, electrolysis lead skim waste material are mixed and put together, it will The auxiliary material of above-mentioned steps production is sprinkling upon on the mixed lead skim waste material put, and stock is completed after uniform stirring；
(3) thick refining, the waste material to be processed made in previous step is added in revolving burner, and control in-furnace temperature is 400 DEG C, first static revolving burner 15 minutes, then starts revolving burner, and holding revolving speed is 5 minutes every circles, keeps revolving burner rotation 40 Minute；
(4) it refines, temperature is promoted to 600 DEG C, spin up speed, holding revolving speed is 2.5 minutes every circles, revolving burner rotation Turn 20 minutes, tin and lead is made gradually to melt fusion；
(5) it refines, continues to improve temperature to 880 DEG C, 2 minutes every circles of revolving burner revolving speed, melting 30 minutes；
(6) cooling ingot casting, cools the temperature to 600 DEG C, and revolving burner stops rotating, and keeps the temperature 30 minutes, puts lead ingot casting, refine out Product impurity content it is as shown in table 1.
Table 1:
Figure GDA0002142740620000061
Embodiment 2
The present embodiment with a kind of its basic step of energy-saving hair lead refining process described in embodiment 1 be it is identical, no It is different with the amount for being auxiliary material, it is different in the control of reaction temperature and time, it is embodied in each step:
(1) auxiliary material is made, is calculated by the weight percent for accounting for waste material to be processed and selects coke 1%, iron filings 0.5%, carbonic acid Sodium 0.1%, coke serve combustion-supporting, and iron filings are to help the separation of various impurity, and the effect of sodium carbonate is to neutralize pH value；
(2) auxiliary material is added, the lead skim being cast by waste and old positive plate, negative plate, electrolysis lead skim waste material are mixed and put together, it will The auxiliary material of above-mentioned steps production is sprinkling upon on the mixed lead skim waste material put, and stock is completed after uniform stirring；
(3) thick refining, the waste material to be processed made in previous step is added in revolving burner, and control in-furnace temperature is 350 DEG C, first static revolving burner 15 minutes, then starts revolving burner, and holding revolving speed is 6 minutes every circles, keeps revolving burner rotation 20 Minute；
(4) it refines, temperature is promoted to 550 DEG C, spin up speed, holding revolving speed is 5 minutes every circles, revolving burner rotation 20 minutes, tin and lead is made gradually to melt fusion；
(5) it refines, continues to improve temperature to 700 DEG C, 1 minute every circle of revolving burner revolving speed, melting 30 minutes；
(6) cooling ingot casting, cools the temperature to 500 DEG C, and revolving burner stops rotating, and keeps the temperature 20 minutes, puts lead ingot casting, refine out Product.
Embodiment 3
The present embodiment with a kind of its basic step of energy-saving hair lead refining process described in embodiment 1 be it is identical, no It is different with the amount for being auxiliary material, it is different in the control of reaction temperature and time, it is embodied in each step:
(1) auxiliary material is made, is calculated by the weight percent for accounting for waste material to be processed and selects coke 2%, iron filings 3%, sodium carbonate 3%, coke serves combustion-supporting, and iron filings are to help the separation of various impurity, and the effect of sodium carbonate is to neutralize pH value；
(2) auxiliary material is added, the lead skim being cast by waste and old positive plate, negative plate, electrolysis lead skim waste material are mixed and put together, it will The auxiliary material of above-mentioned steps production is sprinkling upon on the mixed lead skim waste material put, and stock is completed after uniform stirring；
(3) thick refining, the waste material to be processed made in previous step is added in revolving burner, and control in-furnace temperature is 400 DEG C, first static revolving burner 25 minutes, then starts revolving burner, and holding revolving speed is 4 minutes every circles, keeps revolving burner rotation 60 Minute；
(4) it refines, temperature is promoted to 600 DEG C, spin up speed, holding revolving speed is 2 minutes every circles, revolving burner rotation 10 minutes, tin and lead is made gradually to melt fusion；
(5) it refines, continues to improve temperature to 700 DEG C, 1 minute every circle of revolving burner revolving speed, melting 20 minutes；
(6) cooling ingot casting, cools the temperature to 500 DEG C, and revolving burner stops rotating, and keeps the temperature 40 minutes, puts lead ingot casting, refine out Product.
Embodiment 4
The present embodiment with a kind of its basic step of energy-saving hair lead refining process described in embodiment 1 be it is identical, no It is different with the amount for being auxiliary material, it is different in the control of reaction temperature and time, it is embodied in each step:
(1) auxiliary material is made, is calculated by the weight percent for accounting for waste material to be processed and selects coke 1.8%, iron filings 1%, carbonic acid Sodium 0.8%, coke serve combustion-supporting, and iron filings are to help the separation of various impurity, and the effect of sodium carbonate is to neutralize pH value；
(2) auxiliary material is added, the lead skim being cast by waste and old positive plate, negative plate, electrolysis lead skim waste material are mixed and put together, it will The auxiliary material of above-mentioned steps production is sprinkling upon on the mixed lead skim waste material put, and stock is completed after uniform stirring；
(3) thick refining, the waste material to be processed made in previous step is added in revolving burner, and control in-furnace temperature is 380 DEG C, first static revolving burner 25 minutes, then starts revolving burner, and holding revolving speed is 4 minutes every circles, keeps revolving burner rotation 60 Minute；
(4) it refines, temperature is promoted to 580 DEG C, spin up speed, holding revolving speed is 2 minutes every circles, revolving burner rotation 10 minutes, tin and lead is made gradually to melt fusion；
(5) it refines, continues to improve temperature to 800 DEG C, 1 minute every circle of revolving burner revolving speed, melting 20 minutes；
(6) cooling ingot casting, cools the temperature to 550 DEG C, and revolving burner stops rotating, and keeps the temperature 40 minutes, puts lead ingot casting, refine out Product.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.

Claims (3)

1. a kind of energy-saving hair lead refining process, time dirty applied to lead skim generated during lead-acid storage battery production, lead It receives, which comprises the steps of:
(1) auxiliary material is made, is calculated by the weight percent for accounting for waste material to be processed and selects coke 1%---2%, iron filings 0.5%--- 3%, sodium carbonate 0.1%---1%；
(2) auxiliary material is added, the lead skim being cast by waste and old positive plate, negative plate, electrolysis lead skim waste material are mixed and put together, it will be above-mentioned The auxiliary material of step production is sprinkling upon on the mixed lead skim waste material put, and stock is completed after uniform stirring；
(3) thick refining, the waste material to be processed made in previous step is added in revolving burner, and control in-furnace temperature is 350- 400 DEG C, first static revolving burner 15--25 minutes, then start revolving burner, holding revolving speed is 4--6 minutes every circles, keeps revolving burner Rotation 20--60 minutes；
(4) it refines, temperature is promoted to 550-600 DEG C, spin up speed, holding revolving speed is 2--4 minutes every circles, revolving burner Rotation 5--20 minutes, makes tin and lead gradually melt fusion；
(5) it refines, continues to improve temperature to 700-880 DEG C, 1--2 minutes every circles of revolving burner revolving speed, melting 10--40 minutes；
(6) cooling ingot casting, cools the temperature to 500--650 DEG C, and revolving burner stops rotating, and keeps the temperature 20--40 minutes, puts lead ingot casting.
2. energy-saving hair lead refining process according to claim 1, which comprises the steps of:
(1) auxiliary material is made, is calculated by the weight percent for accounting for waste material to be processed and selects coke 1.2%---1.8%, iron filings 1%---2%, sodium carbonate 0.3%---0.8%；
(2) auxiliary material is added, the lead skim being cast by waste and old positive plate, negative plate, electrolysis lead skim waste material are mixed and put together, it will be above-mentioned The auxiliary material of step production is sprinkling upon on the mixed lead skim waste material put, and stock is completed after uniform stirring；
(3) thick refining, the waste material to be processed made in previous step is added in revolving burner, and control in-furnace temperature is 350- 400 DEG C, first static revolving burner 15--25 minutes, then start revolving burner, holding revolving speed is 5 minutes every circles, keeps revolving burner rotation Turn 30--50 minutes；
(4) it refines, temperature is promoted to 550-600 DEG C, spin up speed, holding revolving speed is 2.5 minutes every circles, revolving burner rotation Turn 10--15 minutes, tin and lead is made gradually to melt fusion；
(5) it refines, continues to improve temperature to 770-800 DEG C, 1--2 minutes every circles of revolving burner revolving speed, melting 20--30 minutes；
(6) cooling ingot casting, cools the temperature to 550--600 DEG C, and revolving burner stops rotating, and keeps the temperature 25--35 minutes, puts lead ingot casting.
3. energy-saving hair lead refining process according to claim 1, which comprises the steps of:
(1) auxiliary material is made, is calculated by the weight percent for accounting for waste material to be processed and selects coke 1.5%, iron filings 1.3%, sodium carbonate 0.3%；
(2) auxiliary material is added, the lead skim being cast by waste and old positive plate, negative plate, electrolysis lead skim waste material are mixed and put together, it will be above-mentioned The auxiliary material of step production is sprinkling upon on the mixed lead skim waste material put, and stock is completed after uniform stirring；
(3) thick refining, the waste material to be processed made in previous step is added in revolving burner, and control in-furnace temperature is 400 DEG C, Then first static revolving burner 20 minutes starts revolving burner, holding revolving speed is 5 minutes every circles, and revolving burner is kept to rotate 40 minutes；
(4) it refines, temperature is promoted to 600 DEG C, spin up speed, holding revolving speed is 2.5 minutes every circles, revolving burner rotation 10 Minute, so that tin and lead is gradually melted fusion；
(5) it refines, continues to improve temperature to 800 DEG C, 2 minutes every circles of revolving burner revolving speed, melting 30 minutes；
(6) cooling ingot casting, cools the temperature to 600 DEG C, and revolving burner stops rotating, and keeps the temperature 30 minutes, puts lead ingot casting.
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CN115572836B (en) * 2022-09-19 2024-04-02 浙江天能电源材料有限公司 Smelting process of mixed high-carbon low-iron alkaline converter
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CN104451161A (en) * 2014-12-04 2015-03-25 中南大学 Method for low-temperature smelting of regenerated lead
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