CN108998680A - The technique for directly preparing oxygen-free copper using useless recycled copper - Google Patents
The technique for directly preparing oxygen-free copper using useless recycled copper Download PDFInfo
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- CN108998680A CN108998680A CN201810864387.3A CN201810864387A CN108998680A CN 108998680 A CN108998680 A CN 108998680A CN 201810864387 A CN201810864387 A CN 201810864387A CN 108998680 A CN108998680 A CN 108998680A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 196
- 239000010949 copper Substances 0.000 title claims abstract description 193
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 193
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 80
- 239000001301 oxygen Substances 0.000 claims abstract description 39
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 39
- 238000007670 refining Methods 0.000 claims abstract description 39
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 15
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000746 purification Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 20
- 239000003610 charcoal Substances 0.000 claims description 13
- 239000003345 natural gas Substances 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 229910052684 Cerium Inorganic materials 0.000 claims description 6
- 229910020785 La—Ce Inorganic materials 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 239000007770 graphite material Substances 0.000 claims description 6
- 238000005496 tempering Methods 0.000 claims description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 238000007499 fusion processing Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 abstract description 8
- 235000013547 stew Nutrition 0.000 abstract description 4
- 238000009298 carbon filtering Methods 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 21
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 229910052746 lanthanum Inorganic materials 0.000 description 4
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 4
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007717 exclusion Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241001424392 Lucia limbaria Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 235000019241 carbon black Nutrition 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229940112669 cuprous oxide Drugs 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Classifications
-
- 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
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to the preparations of oxygen-free copper, the technique that oxygen-free copper is specifically directly prepared using useless recycled copper, carry out molten refining to useless recycled copper including using refining furnace；It is cleaned to the copper liquid of melting, deoxidation, purification；Above-mentioned purified copper liquid is placed in standing furnace and is stood deoxidation again；Copper liquid after above-mentioned standing again deoxidation is drawn by above drawing furnace, obtains anaerobic copper products.The present invention directly prepares oxygen-free copper bar or anaerobic copper products all of useless recycled copper, the task of some oxygen content and copper content before mainly being completed using the process of two removal of impurities of redox and rare-earth refining agent, deoxidation, then deoxidation process are the carbon filtering of copper outlet stews, sealing carbonaceous chute, standing furnace carbon restore these links and completes.The abbreviated system of this optimization has not only saved resource, but also can be done directly the anaerobic copper products for preparing high quality simultaneously.
Description
Technical field
The present invention relates to the preparation process of oxygen-free copper, specifically a kind of work that oxygen-free copper is directly prepared using useless recycled copper
Skill.
Background technique
China is a country for copper resource scarcity, but is the country that copper material yield is in the first in the world.In copper material yield
In, about 50% is pure copper wire, copper bar product, is mainly used for wire and cable and conductive material.Wherein copper rod machining is with continuous casting and rolling
Bright low-oxygen copper pole and based on up-drawing method continuous casting oxygen-free copper rod.And bright low-oxygen copper pole is mainly used as adding for common wiring product
Work；Oxygen-free copper bar by processing after, burr is few, processing performance is good, product be mainly used for electromagnetic wire and filament it is contour, it is smart,
Highly sophisticated products.Currently, the bright low-oxygen copper pole all prepared using useless recycled copper, due to oxide reduction techniques and its refining
The refining techniques reason of agent, for oxygen content in 400ppm or more, copper content is below 99.9%, after pole stock can only manufacture
Continuous low, middle end product, such light low-oxygen copper pole can not be used to draw small copper wire or thin, microwire copper products, because small
Line or filament product can only could be drawn with oxygen-free copper bar.And the anaerobics copper products such as oxygen-free copper bar or anaerobic copper bar are prepared at present,
Its raw material has to all using cathode copper (tough cathode, 99.96% or more copper content), and centre is without redox refining
Otherwise process cannot produce anaerobic copper products.
Summary of the invention
In view of the above technical problems, it is preferable and energy-saving and environment-friendly straight using useless recycled copper to provide a kind of quality of production by the present invention
Connect the technique for preparing oxygen-free copper.
The technical solution adopted by the present invention are as follows: the technique for directly preparing oxygen-free copper using useless recycled copper comprising following step
It is rapid:
(1) melting is carried out to useless recycled copper using refining furnace；
(2) it is cleaned to the copper liquid of melting, deoxidation, purification；
(3) above-mentioned purified copper liquid is placed in standing furnace and is stood deoxidation again；
(4) copper liquid after above-mentioned standing again deoxidation is drawn by above drawing furnace, obtains anaerobic copper products.
Preferably, copper content accounts for 96%wt or more in the useless recycled copper.
Preferably, the refining furnace uses stationary reverberatory furnace, tilting furnace or NGL furnace.
Preferably, being restored in the refining furnace fusion process using all-oxygen combustion, natural gas；Make in reduction latter stage
The removal of impurities, deoxidation, purification are carried out to copper liquid with rare-earth refining agent, copper liquid oxygen content≤300ppm after reduction；Copper liquid temperature
It is maintained at 1150 ~ 1170 DEG C.
Preferably, the rare-earth refining agent uses La-Ce system, wherein the mass content of La is that the quality of 35%, Ce contains
Amount is 65%.
Preferably, the copper liquid of above-mentioned oxygen content≤300ppm enters the closed standing furnace by electrical heat tracing
In, the refining furnace and standing furnace are connected by sealing chute, linear distance≤1200mm of connection, seal graphite material built in chute
Matter.
Preferably, the sealing chute end for being located at the refining furnace exit is equipped with an oval charcoal filtering
Packet.
Preferably, the copper liquid in the standing furnace is covered by one layer of tempering charcoal not less than 120mm thickness always, copper
Liquid temperature is maintained within the scope of 1150 ~ 1170 DEG C, and time of repose is no less than 30 minutes, oxygen content≤10ppm.
Preferably, copper liquid, which is directly entered after above-mentioned standing furnace again deoxidation by sealed graphite tube passage, draws furnace, enter
On draw copper liquid in furnace deoxidation covered using the wooden carbon reduction and crystalline flake graphite.
Preferably, being round pole stock, anaerobic copper bus-bar and flat wire class by the anaerobic copper products for drawing furnace extraction on above-mentioned
Or oxygen-free copper profile shapes.
The present invention directly prepares oxygen-free copper bar or anaerobic copper products all of useless recycled copper, mainly utilizes redox
The task of some oxygen content and copper content before being completed with the process of two of rare-earth refining agent removal of impurities, deoxidation, then deoxidation process
It is the carbon filtering of copper outlet stews, sealing carbonaceous chute, standing furnace carbon restore these links and completes.This optimization it is short
Flow process has not only saved resource, but also can be done directly the anaerobic copper products for preparing high quality simultaneously.
Specific embodiment
The present invention is described more detail below, illustrative examples of the invention and explanation are used to explain the present invention herein,
But it is not as a limitation of the invention.
The technique for directly preparing oxygen-free copper using useless recycled copper comprising following steps:
(1) melting is carried out to useless recycled copper using refining furnace；Copper content accounts for 96%wt or more, the essence in the useless recycled copper
Furnace is using stationary reverberatory furnace, tilting furnace or NGL furnace etc..Wherein reverberatory furnace small investment, it is at low cost；Fascinate furnace thermal efficiency height,
Labor intensity is low, easy to operate.
(2) it is cleaned to the copper liquid of melting, deoxidation, purification；In refining furnace fusion process, using all-oxygen combustion, day
Right gas reduction, reduction latter stage is using rare-earth refining agent to copper liquid removal of impurities, deoxidation, purification；Wherein restore after copper liquid oxygen content≤
300ppm；Copper liquid temperature is maintained at 1150 ~ 1170 DEG C.Traditional technique is using natural gas+compressed air burning, due in air
Oxygen content is about 21%, and the nitrogen there is also about 79% is aphlogistic inert gas, it had both reduced the temperature in combustion process,
Smoke discharge amount is greatly increased again；And the present invention uses natural gas+oxygen combustion, oxygen content 100%, ignition temperature can
Directly to be promoted from 1900 DEG C to 2800 DEG C, fusing time is shortened, and greatly reduce the exhaust gas volumn of discharge.The present invention is also
It is restored using natural gas and replaces poling, solve such Railway Project: trees (pine tree) are the forest reserves, are saved
About；In addition although trees are hydrocarbon, but a large amount of carbon blacks can be generated in reduction process, the relative increase difficulty of dedusting
Degree, and large labor intensity is inconvenient for operation, and directlys adopt natural gas reduction, and natural gas is direct in copper liquid, complete ground cleave
Solution be C H, no other impurities product, and restore uniformly, it is reliable, convenient, labor intensity is but very low；Especially by hydrogen reduction
Effect is more preferable, more thoroughly, substantially reduces oxygen content.Copper liquid oxygen content after reduction in 300ppm and following progress deoxidation, remove
Miscellaneous, purification, can be improved copper content, the step for completed by rare-earth refining agent.Rare-earth refining agent uses La-Ce system；Lanthanum
(La) content 35%；Cerium (Ce) content 65%.It can achieve the purpose that " except odd job is net ", its slag making and purification organizational capacity are very
By force, while also the part oxygen of copper liquid is further seized, so that copper content is reached 99.93% or more, oxygen content is made to be reduced to 300ppm
Even 250ppm or less.
(3) above-mentioned purified copper liquid is placed in standing furnace and is stood deoxidation again；Containing after refining furnace refining
Oxygen amount≤300ppm copper liquid enters in the closed standing furnace by electrical heat tracing, and refining furnace and standing furnace are by sealing chute
Connection, linear distance≤1200mm of connection, graphite material built in sealing chute are contacted with it with copper liquid；Seal chute end
(at stove exit) is equipped with an oval charcoal filtering packet, makes further deoxidation in copper liquid filter process.In electrical heat tracing
Standing furnace in copper liquid always by one layer of tempering charcoal covering not less than 120mm thickness, copper liquid temperature is maintained at 1150 ~ 1170
Within the scope of DEG C, the time of repose of copper liquid in a furnace is no less than 30 minutes, makes copper liquid deoxidation again in time of repose, to guarantee copper
Liquid is entering oxygen content≤10ppm before above drawing furnace.In implementation process, copper liquid leaves refining furnace and arrives first at carbon filtering
It stews, the filtering of this carbon, which stews, to prevent oxygen uptake by copper liquid and air exclusion, inhale hydrogen；Simultaneously again by copper liquid deoxidation again.Seal chute
Effect is also to prevent oxygen uptake, inhale hydrogen copper liquid and air exclusion.Standing furnace is that deoxidation again is completed by the thick-layer charcoal of covering
Process makes oxygen content reach≤10ppm.Copper liquid temperature come out from refining furnace until above draw furnace be required to be maintained at 1150 ~
1170 DEG C, purpose in addition to ensuring that outside its mobility, there are one important reason be exactly the copper liquid that is come out from refining furnace always
Draw the whole process that furnace needs to complete last deoxidation in arrival.The deoxygenation again of the above process is as follows:
CuO+Cu2O+C→Cu+CuO+CO→2Cu+CO2↑
(4) copper liquid after above-mentioned standing again deoxidation is drawn by above drawing furnace, obtains anaerobic copper products.Above-mentioned standing furnace with above draw
Furnace is a pair of of disjunctor power frequency induction furnace.Copper liquid, which is directly entered after above-mentioned standing furnace heat-preserving deoxidizing through sealed graphite tube passage, draws
Furnace above draws the copper liquid in furnace using the measures such as the wooden carbon also source and crystalline flake graphite covering deoxidation.Oxygen is to aoxidize in melting copper liquid
Copper (CuO) and cuprous oxide (CuO2) form existing for, the wooden carbon (C) functions at high temperature, can be with deoxidation, to guarantee
Oxygen content is less than 10ppm.Draw on described furnace on draw system using servo motor traction system, Serve Motor Control is by PLC system
It completes, meets high-frequency intermittent traction；On to draw the anaerobic copper products extracted on furnace can be round pole stock, specification can
To be φ 8mm ~ φ 16mm, can be anaerobic copper bus-bar and flat wire class, the oxygen-free copper profile shapes that can also be other shapes again.
Embodiment 1
It uses tilting furnace to carry out melting to copper content for the useless recycled copper of 96%wt, and is restored using all-oxygen combustion, natural gas, also
Former latter stage, the oxygen content of copper liquid was 300ppm, copper content after reduction using rare-earth refining agent to copper liquid removal of impurities, deoxidation, purification
99.93%；Copper liquid temperature is maintained at 1150 DEG C, and wherein rare-earth refining agent uses La-Ce system, wherein lanthanum (La) content 35%, cerium
(Ce) content 65%.The copper liquid is entered in the closed standing furnace by electrical heat tracing again, refining furnace and standing furnace are by sealing
Chute connection, the linear distance 1200mm of connection, graphite material built in sealing chute are contacted with it with copper liquid；Seal chute end
(at stove exit) is equipped with an oval charcoal filtering packet, makes further deoxidation in copper liquid filter process.In electrical heat tracing
Standing furnace in copper liquid covered always by the tempering charcoal of one layer of 120mm thickness, copper liquid temperature is maintained at 1150 or so, and copper liquid exists
Time of repose in stove is 30 minutes, and the oxygen content of copper liquid is made to reach 10ppm.Copper liquid after above-mentioned standing again deoxidation is passed through
On draw furnace extraction, obtain anaerobic copper products.Being detected the oxygen-free copper product density is 8.91kg/dm3, soft state conductivity is
0.01707 Ω .mm2/m, oxygen content 9ppm.
Embodiment 2
It uses stationary reverberatory furnace to carry out melting to copper content for the useless recycled copper of 96.6%wt, and uses all-oxygen combustion, natural gas
Reduction, reduction latter stage, the oxygen content of copper liquid was 280ppm, copper after reduction using rare-earth refining agent to copper liquid removal of impurities, deoxidation, purification
Content 99.96%；Copper liquid temperature is maintained at 1160 DEG C, wherein rare-earth refining agent use La-Ce system, wherein lanthanum (La) content 35%,
Cerium (Ce) content 65%.The copper liquid is entered in the closed standing furnace by electrical heat tracing again, refining furnace and standing furnace are by close
Chute connection, the linear distance 1150mm of connection are sealed, graphite material built in sealing chute is contacted with it with copper liquid；Seal chute end
Head (at stove exit) is equipped with an oval charcoal filtering packet, makes further deoxidation in copper liquid filter process.It is protected in electric heating
Copper liquid in the standing furnace of temperature is covered by the tempering charcoal of one layer of 125mm thickness always, and copper liquid temperature is maintained at 1160 or so, copper liquid
Time of repose in a furnace is 35 minutes, and the oxygen content of copper liquid is made to reach 9.5ppm.By the copper liquid after above-mentioned standing again deoxidation
It is drawn by above drawing furnace, obtains anaerobic copper products.Being detected the oxygen-free copper product density is 8.9kg/dm3, soft state conductivity is
0.01703 Ω .mm2/m, oxygen content 8ppm.
Embodiment 3
It uses NGL furnace to carry out melting to copper content for the useless recycled copper of 96.5%wt, and is restored using all-oxygen combustion, natural gas, also
Former latter stage, the oxygen content of copper liquid was 250ppm, copper content after reduction using rare-earth refining agent to copper liquid removal of impurities, deoxidation, purification
99.95%；Copper liquid temperature is maintained at 1170 DEG C, and wherein rare-earth refining agent uses La-Ce system, wherein lanthanum (La) content 35%, cerium
(Ce) content 65%.The copper liquid is entered in the closed standing furnace by electrical heat tracing again, refining furnace and standing furnace are by sealing
Chute connection, the linear distance 1135mm of connection, graphite material built in sealing chute are contacted with it with copper liquid；Seal chute end
(at stove exit) is equipped with an oval charcoal filtering packet, makes further deoxidation in copper liquid filter process.In electrical heat tracing
Standing furnace in copper liquid covered always by the tempering charcoal of one layer of 128mm thickness, copper liquid temperature is maintained at 1170 or so, and copper liquid exists
Time of repose in stove is 36 minutes, and the oxygen content of copper liquid is made to reach 9ppm.Copper liquid after above-mentioned standing again deoxidation is passed through
On draw furnace extraction, obtain anaerobic copper products.Being detected the oxygen-free copper product density is 8.9kg/dm3, soft state conductivity is
0.01707 Ω .mm2/m, oxygen content 8.3ppm.
It is provided for the embodiments of the invention technical solution above to be described in detail, specific case used herein
The principle and embodiment of the embodiment of the present invention are expounded, the explanation of above embodiments is only applicable to help to understand this
The principle of inventive embodiments；At the same time, for those skilled in the art, according to an embodiment of the present invention, in specific embodiment party
There will be changes in formula and application range, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. the technique for directly preparing oxygen-free copper using useless recycled copper comprising following steps:
(1) melting is carried out to useless recycled copper using refining furnace；
(2) it is cleaned to the copper liquid of melting, deoxidation, purification；
(3) above-mentioned purified copper liquid is placed in standing furnace and is stood deoxidation again；
(4) copper liquid after above-mentioned standing again deoxidation is drawn by above drawing furnace, obtains anaerobic copper products.
2. the technique for directly preparing oxygen-free copper using useless recycled copper according to claim 1, it is characterised in that: the useless purple is miscellaneous
Copper content accounts for 96%wt or more in copper.
3. the technique for directly preparing oxygen-free copper using useless recycled copper according to claim 1, it is characterised in that: the refining furnace
Using stationary reverberatory furnace, tilting furnace or NGL furnace.
4. the technique for directly preparing oxygen-free copper using useless recycled copper according to claim 1, it is characterised in that: in the refining
In furnace fusion process, restored using all-oxygen combustion, natural gas；It is removed using rare-earth refining agent to described in copper liquid progress in reduction latter stage
Miscellaneous, deoxidation, purification, copper liquid oxygen content≤300ppm after reduction；Copper liquid temperature is maintained at 1150 ~ 1170 DEG C.
5. the technique for directly preparing oxygen-free copper using useless recycled copper according to claim 4, it is characterised in that: the rare earth essence
It refines agent and uses La-Ce system, the mass content that wherein mass content of La is 35%, Ce is 65%.
6. the technique according to claim 4 or 5 for directly preparing oxygen-free copper using useless recycled copper, it is characterised in that: above-mentioned to contain
Oxygen amount≤300ppm copper liquid enters in the closed standing furnace by electrical heat tracing, the refining furnace and standing furnace by
Chute connection is sealed, linear distance≤1200mm of connection seals graphite material built in chute.
7. the technique for directly preparing oxygen-free copper using useless recycled copper according to claim 6, it is characterised in that: be located at the essence
The sealing chute end in furnace exit is equipped with an oval charcoal filtering packet.
8. the technique for directly preparing oxygen-free copper using useless recycled copper according to claim 7, it is characterised in that: in the standing
Copper liquid in furnace is covered by one layer of tempering charcoal not less than 120mm thickness always, and copper liquid temperature is maintained at 1150 ~ 1170 DEG C of ranges
Interior, time of repose is no less than 30 minutes, oxygen content≤10ppm.
9. the technique for directly preparing oxygen-free copper using useless recycled copper according to claim 8, it is characterised in that: copper liquid is through above-mentioned
Standing furnace is directly entered after deoxidation again by sealed graphite tube passage draws furnace, into the copper liquid above drawn in furnace using the wooden carbon reduction and
Crystalline flake graphite covers deoxidation.
10. the technique for directly preparing oxygen-free copper using useless recycled copper according to claim 9, it is characterised in that: by above-mentioned
On draw the anaerobic copper products of furnace extraction for round pole stock, anaerobic copper bus-bar and flat wire class or oxygen-free copper profile shapes.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029239A (en) * | 2019-05-28 | 2019-07-19 | 江苏仓环铜业股份有限公司 | A kind of oxygen-free copper production technology |
| CN110527860A (en) * | 2019-09-23 | 2019-12-03 | 四川博鑫铜业有限公司 | Waste purple impure copper refining agent and preparation method and application thereof |
| CN111235405A (en) * | 2020-03-20 | 2020-06-05 | 四川博鑫铜业有限公司 | A kind of preparation technology of low oxygen copper rod |
| CN112008051A (en) * | 2020-09-04 | 2020-12-01 | 江苏亨通电力智网科技有限公司 | Production method of rare earth refined copper liquid reduction transition rod |
| CN113832357A (en) * | 2021-09-24 | 2021-12-24 | 湖南金龙新材料有限公司 | Method for preparing high-performance oxygen-free copper by using reclaimed copper |
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| CN110029239A (en) * | 2019-05-28 | 2019-07-19 | 江苏仓环铜业股份有限公司 | A kind of oxygen-free copper production technology |
| CN110527860A (en) * | 2019-09-23 | 2019-12-03 | 四川博鑫铜业有限公司 | Waste purple impure copper refining agent and preparation method and application thereof |
| CN110527860B (en) * | 2019-09-23 | 2021-09-07 | 四川博鑫铜业有限公司 | A kind of waste purple miscellaneous copper refining agent and its preparation method and application |
| CN111235405A (en) * | 2020-03-20 | 2020-06-05 | 四川博鑫铜业有限公司 | A kind of preparation technology of low oxygen copper rod |
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Application publication date: 20181214 |