CN101274363B - Method for continuously converting and casting oxygen-free copper ingot - Google Patents
Method for continuously converting and casting oxygen-free copper ingot Download PDFInfo
- Publication number
- CN101274363B CN101274363B CN2008100615636A CN200810061563A CN101274363B CN 101274363 B CN101274363 B CN 101274363B CN 2008100615636 A CN2008100615636 A CN 2008100615636A CN 200810061563 A CN200810061563 A CN 200810061563A CN 101274363 B CN101274363 B CN 101274363B
- Authority
- CN
- China
- Prior art keywords
- deoxidation
- bottom blowing
- copper
- copper liquid
- enters
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a continuous blowing and casting method of oxygen-free copper ingots, which pertains to the metal smelting and casting technical field and is carried out according to the technical steps as follows: A. cathode copper is firstly melted in a smelting furnace, and melted copper liquid enters a deoxidation furnace through a bottom blowing chute; B. carbon monoxide gas or the mixed gas of carbon monoxide and nitrogen enters the copper liquid in the bottom blowing chute through the bottom blowing chute and enters the deoxidation furnace with the copper liquid to realize the deoxidation and the degassing of a first stage; C. when passing through a diversion trench arranged in a bottom blowing furnace end, the carbon monoxide gas or the mixed gas of carbon monoxide and nitrogen enters the copper liquid in the diversion trench for realizing the deoxidation and the degassing of a second stage to the copper liquid in the diversion trench; D. the copper liquid after the second stage of deoxidation and degassing enters a crystallizer through a casting gate arranged in the bottom blowing furnace end. The oxygen content of an oxygen-free copper ingot base produced by the method of the invention can stably reach not only less than 5ppm, but also less than 3ppm.
Description
Technical field
The present invention relates to a kind of method for continuously converting and casting oxygen-free copper ingot, belong to the Metal Melting casting technology field.
Background technology
The conductance of fine copper is only second to silver, and price is far below silver.Therefore fine copper is widely used in fields such as electrician, electronics as conductive material after melting and casting and processing.But copper combines with oxygen easily when high temperature and forms cuprous oxide, the cuprous crystal boundary place that is distributed in of solidification and crystallization rear oxidation, and the rising of oxygen content descends the conductance of copper in the copper, can not reach the due conductance more than 100% of fine copper.Oxygen content 〉=50PPm in the pure copper material that the conventional melting and casting method of employing is produced, and along with the development of electronics, communications industry, especially the pure copper material of the high conduction of low residual oxygen of usefulness such as magnetic control element, radio-frequency cable, electron tube is led the needs of high-fidelity for guaranteeing height.Require then that cupric contains below the oxygen 5ppm conductance 〉=101% more than 99.99% in the material.
The production method of oxygen-free copper ingot casting and strand mainly contains vacuum melting casting and the casting of conventional melting up-drawing method at present.Vacuum melting is that smelting furnace and Casting Equipment are arranged in the airtight box hat, vacuumize then, the melting of copper and casting are remained under the vacuum state to be carried out, reaching the purpose of secluding air and deoxygenation, but this method equipment relative complex, operation inconvenience, lumber recovery is low, the production cost height should not form the large-scale production of continuous batchization, especially is subjected to the influence of equipment to make the fine copper oxygen content of production be difficult for keeping continous-stable.It is after adopting conventional smelting furnace with the copper fusing that up-drawing method is produced the oxygen-free copper strand, draw bar is inserted in the copper liquid behind pinch roll that passes through draw-gear down and graphite-pipe crystallizer by last, clamp pinch roll then, utilize draw-gear that draw bar is drawn with the copper proposition and by graphite-pipe crystallizer solidification and crystallization according to certain temperature and speed from bottom to top, owing to shrink during the copper solidification and crystallization, form the negative pressure of moment, the discharging of oxygen when being beneficial to copper liquid and solidifying, and realize reducing the purpose of oxygen.But this method only can be reduced to 7～10ppm with oxygen content limitedly, and can not be reduced to below the 5ppm.And only can produce low and middle-grade products of small dimension.
Summary of the invention
It is reasonable to the purpose of this invention is to provide a kind of technological design, can effectively reduce the oxygen content of oxygen-free copper and the method for continuously converting and casting oxygen-free copper ingot of casting cost,
The present invention is a method for continuously converting and casting oxygen-free copper ingot, employing is by the smelting furnace that links to each other successively, the deoxidation stove, place the bottom blowing chute of band air brick in bottom between smelting furnace and the deoxidation stove, furnace for converting and casting oxygen-free copper ingot with the bottom blowing burner of mutually related guiding gutter of deoxidation stove and bottom blowing brick constitutes is characterized in that being undertaken by following processing step:
A, tough cathode melt in smelting furnace earlier, and the copper liquid after the fusing enters the deoxidation stove by the bottom blowing chute;
B, with the mist of CO gas or carbon monoxide and nitrogen, the air brick by bottom blowing chute bottom is the disperse shape and enters in the copper liquid in the bottom blowing chute, and enters in the deoxidation stove thereupon, realizes the deoxidation degassing of phase I;
Enter in the bottom convertor head after the deoxidation degassing of copper liquid in C, the deoxidation stove through the phase I, by guiding gutter the time, the mist of CO gas or carbon monoxide and the nitrogen bottom blowing brick by the guiding gutter bottom is the disperse shape enters in the copper liquid in the guiding gutter, the copper liquid in the guiding gutter is carried out the deoxidation degassing of second stage;
Copper liquid after D, the second stage deoxidation degassing enters crystallizer by the casting gate in the bottom blowing burner.
The described temperature that enters the copper liquid of deoxidation stove by the bottom blowing chute can be 1120～1200 ℃.
The ratio of carbon monoxide and nitrogen can be 10～70% in the described mist: 30～90%.
Cardinal principle of the present invention is as follows:
Bottom from high-temperature copper liquid feeds the mist of the nitrogen of carbon monoxide with reducing property or carbon monoxide and inertia, and makes the gas of feeding be disperse to distribute and enter in the copper liquid.Combine with oxygen atom in the copper liquid by carbon monoxide and to generate carbon dioxide, the carbon monoxide more than needed and the carbon dioxide of generation are assembled the formation bubble with original nitrogen complex and are overflowed from copper liquid, and reach the effect of high-purity deoxidation.Simultaneously the nitrogen of Tong Ruing also after the adsorpting aggregation deoxidation the objectionable and gas of the hydrogen of emersion and steam and other etc. form that bubble is overflowed and the adverse consequences that purifies copper liquid and elimination " hydrogen disease " from copper liquid.
The present invention compared with prior art has following outstanding advantage and good effect:
1, introduces carbon monoxide.Carbon monoxide has stronger affinity than copper and oxygen, and carbon monoxide combines with oxygen atom in the copper liquid and is created on the carbon dioxide that has the inertia of good stability in the copper liquid when high temperature, and realizes the purpose of deoxidation.Simultaneously, carbon dioxide seldom is dissolved in the copper liquid during high temperature.
2, introduce the mist of carbon monoxide and nitrogen.Nitrogen belongs to inert gas concerning copper, is not dissolved in copper.After in copper liquid, feeding nitrogen, the nuclei of bubbles of nitrogen not only adsorbs rich carbon monoxide and carbon dioxide formation bubble is overflowed from copper liquid, the nuclei of bubbles of nitrogen residual steam in the absorbing copper liquid also simultaneously, steam pyrolytic hydrogen and oxygen, and the hydrogen that residual richness goes out after the deoxidation and other bad air and impurity.Purify copper liquid, eliminated the adverse consequences of the residual copper that hydrogen and carbon monoxide caused " hydrogen disease " after the deoxidation.
3, carbon monoxide and nitrogen do not react under normal temperature and high temperature, help storing.After being mixed by a certain percentage, carbon monoxide and nitrogen feeds together in the copper liquid, synergy, and deoxidizing purification carries out simultaneously.Feeder is simple, and is easy to operate.
4, adopt the mode of continuous smelting-blowing, add tough cathode one by one slightly continuously, the air blowing point of tough cathode continuous fusing back air brick bottom the bottom blowing chute in smelting furnace continues to enter the deoxidation stove, and this moment, copper liquid obtained purification for the first time, the deoxidation degassing; The guiding gutter that copper liquid in the deoxidation stove is formed by a plurality of air blowing points makes copper liquid obtain the further deoxidation degassing and purification, can effectively reduce the oxygen content in the copper ingot base.
5, the present invention does not need vacuum plant, and simple in structure, easy to operate, cost is low, and is reliable and stable, is easy to form large-scale production.The oxygen content of the oxygen-free copper ingot blank of producing by the method for the invention, not only can stablize and reach below the 5ppm, also can reach below the 3ppm, can satisfy the needs that contain the pure copper material that oxygen 5ppm is following, the low residual oxygen height of conductance 〉=101% conducts electricity of usefulness such as magnetic control element, radio-frequency cable, electron tube.
Description of drawings
Fig. 1 is the overall structure cutaway view of furnace for converting and casting oxygen-free copper ingot of the present invention;
Fig. 2 is an A-A face structure cutaway view shown in Figure 1.
Among the figure, 1 is refractory brick, and 2 is refractory material, and 3 is furnace shell, 4 is smelting furnace, and 5 are the melting bell, and 6 is tough cathode, and 7 is charge door, 8 is exhaust outlet, and 9 are the deoxidation bell, and 10 are the deoxidation stove, and 11 are the bottom blowing burner, 12 are the bottom blowing brick, and 13 is the furnace bottom chamber, and 14 is iron core, and 15 is coil, 16 is water collar, and 17 is electric induction heater, and 18 is channel, and 19 are the bottom blowing chute, 20 is casting gate, and 21 is guiding gutter, and 22 is air brick.
The specific embodiment
The present invention adopts furnace for converting and casting oxygen-free copper ingot, main furnace shell 3 by outsourcing refractory brick 1 and refractory material 2, place the smelting furnace 4 and the deoxidation stove 10 of the charged induction heater 17 in the bottom that is set up in parallel in the furnace shell 3, place the bottom blowing chute 19 of band air brick 22 in bottom between smelting furnace 4 and the deoxidation stove 10, the bottom blowing burner 11 of bottom band casting gate 20 and bottom blowing brick 12 links to each other with deoxidation stove 10, place and be the guiding gutter 21 that serpentine distributes in the bottom blowing burner 11, place the melting bell 5 on smelting furnace 4 tops, place deoxidation bell 9 formations such as grade of deoxidation stove 10 top band exhaust outlets 8.Electric induction heater 17 around the channel 18 of furnace bottom chamber 13, places water collar 16 formations such as grade outside 13 coils 15 of furnace bottom chamber by the iron core 14 and the coil 15 that place in the furnace bottom chamber 13.
Below in conjunction with embodiment the present invention is further described, but the present invention is not limited to following embodiment, when practical application, can require and use occasion, select the different technology conditions except that following embodiment, but all do not limit the scope of the invention in any form according to different performance:
1, tough cathode 6 is entered in the smelting furnace 4 by charge door 7, under the effect of electric induction heater 17, melt, coil 15 external power supplys in the furnace bottom chamber 13, the energising back produces magnetic field and changes electric energy into iron core 14, make the copper heat fused in the channel 18, carry out heat exchange with the tough cathode 6 in the smelting furnace 4, make the fusion temperature of tough cathode 6 reach 1083 ℃.Copper liquid after the fusing heats up and reaches 1120～1200 ℃, enter insulation in the deoxidation stove 10 by bottom blowing chute 19 then, guarantee that temperature is 1120～1180 ℃, the mist of while CO gas or 10～70% carbon monoxide and 30～90% nitrogen, air brick 22 by bottom blowing chute 19 bottoms and refractory material are the disperse shape and enter in the copper liquid in the bottom blowing chute 19, and enter in the deoxidation stove 10 thereupon.This moment the generation carbon dioxide that reacts of the free oxygen in the copper liquid and oxide and carbon monoxide in bottom blowing chute 19 and deoxidation stove 10, behind the deoxygenation remaining hydrogen, carbon dioxide and other gas and carbon monoxide more than needed is assembled mutually or with the mutual adsorpting aggregation of nitrogen that feeds after form bubble and from melt, float, overflow by the exhaust outlet on the deoxidation bell 98, realize the deoxidation degassing of phase I.Reaction equation is (1), (2), (3), (4), (5):
H
2O→2H+O…………………………………(1)
O+CO→CO
2…………………………………(2)
CuO+CO→CO
2+Cu
2O………………………(3)
Cu
2O+CO→CO
2+Cu…………………………(4)
MO+CO→CO
2+M……………………………(5)
2, enter bottom convertor head 11 after the deoxidation degassing of the copper liquid in the heat-preserving deoxidizing stove 10 through the phase I, during the copper liquid guiding gutter 21 that serpentine distributes in by the bottom blowing burner, the mist of CO gas or 10～70% carbon monoxide and 30～90% nitrogen bottom blowing brick 12 and the refractory material by the guiding gutter bottom is the disperse shape and enters in the guiding gutter 21, copper liquid in the guiding gutter 21 is carried out the deoxidation degassing of second stage, so that copper liquid further purifies.Its reaction equation also is (1), (2), (3), (4), (5).
3, the copper liquid after the second stage deoxidation degassing enters crystallizer by the casting gate in the bottom blowing burner 11 20, between crystallizer and casting gate 20 sealed hollow is arranged and has pure carbon monoxide gas to continue to feed, and does not contact with air to guarantee copper liquid.
4, oxygen content can reach below the 5ppm in the anaerobic copper ingot of producing thus, even can reach below the 3ppm.The copper conductance can reach 101～102%IACS.
Claims (3)
1. method for continuously converting and casting oxygen-free copper ingot, employing is by the smelting furnace (4) that links to each other successively, deoxidation stove (10), place the bottom blowing chute (19) of bottom band air brick (22) between smelting furnace (4) and the deoxidation stove (10), furnace for converting and casting oxygen-free copper ingot with the bottom blowing burner (11) of mutually related guiding gutter of deoxidation stove (10) (21) and bottom blowing brick (12) constitutes is characterized in that being undertaken by following processing step:
A, tough cathode melt in smelting furnace earlier, and the copper liquid after the fusing enters the deoxidation stove by the bottom blowing chute;
B, with the mist of CO gas or carbon monoxide and nitrogen, the air brick by bottom blowing chute bottom is the disperse shape and enters in the copper liquid in the bottom blowing chute, and enters in the deoxidation stove thereupon, realizes the deoxidation degassing of phase I;
Enter in the bottom convertor head after the deoxidation degassing of copper liquid in C, the deoxidation stove through the phase I, by guiding gutter the time, the mist of CO gas or carbon monoxide and the nitrogen bottom blowing brick by the guiding gutter bottom is the disperse shape enters in the copper liquid in the guiding gutter, the copper liquid in the guiding gutter is carried out the deoxidation degassing of second stage;
Copper liquid after D, the second stage deoxidation degassing enters crystallizer by the casting gate in the bottom blowing burner.
2. by the described method for continuously converting and casting oxygen-free copper ingot of claim 1, it is characterized in that the described temperature that enters the copper liquid of deoxidation stove by the bottom blowing chute is 1120～1200 ℃.
3. by the described method for continuously converting and casting oxygen-free copper ingot of claim 1, it is characterized in that the ratio of carbon monoxide and nitrogen is 10～70%: 30～90% in the described mist.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100615636A CN101274363B (en) | 2008-05-06 | 2008-05-06 | Method for continuously converting and casting oxygen-free copper ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100615636A CN101274363B (en) | 2008-05-06 | 2008-05-06 | Method for continuously converting and casting oxygen-free copper ingot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101274363A CN101274363A (en) | 2008-10-01 |
| CN101274363B true CN101274363B (en) | 2011-02-02 |
Family
ID=39994454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100615636A Active CN101274363B (en) | 2008-05-06 | 2008-05-06 | Method for continuously converting and casting oxygen-free copper ingot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101274363B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110229967A (en) * | 2019-06-05 | 2019-09-13 | 中南大学 | The preparation method of high-air-tightness oxygen-free copper |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706771B (en) * | 2013-08-28 | 2015-08-26 | 新兴铸管（浙江）铜业有限公司 | Lower chute is used in the copper bar processing being provided with aeration device |
| CN104103338B (en) * | 2014-06-30 | 2016-08-24 | 中色奥博特铜铝业有限公司 | A kind of production technology of cable copper strip |
| CN206337298U (en) * | 2016-12-06 | 2017-07-18 | 江西广信新材料股份有限公司 | A kind of process units of high-purity oxygen-free copper ingot blank |
| AU2018264670B2 (en) * | 2017-05-10 | 2023-10-26 | Haldor Topsøe A/S | A process for reducing the content of oxygen in metallic copper |
| CN107377913A (en) * | 2017-06-09 | 2017-11-24 | 芜湖云邦铜业有限公司 | A kind of quick deoxidization technique of molten copper protected using nitrogen |
| CN111304458A (en) * | 2020-03-27 | 2020-06-19 | 芜湖楚江合金铜材有限公司 | High accuracy red copper contact pin production is with deoxidization smelting unit |
| CN111392941A (en) * | 2020-04-19 | 2020-07-10 | 江西耐乐科技协同创新有限公司 | Copper water exhaust and slag discharge device combining carbon monoxide and pulse oscillation |
| US20230313340A1 (en) | 2022-04-05 | 2023-10-05 | Doggone Investment Co. LLC | Apparatus and method for production of high purity copper-based alloys |
-
2008
- 2008-05-06 CN CN2008100615636A patent/CN101274363B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110229967A (en) * | 2019-06-05 | 2019-09-13 | 中南大学 | The preparation method of high-air-tightness oxygen-free copper |
| CN110229967B (en) * | 2019-06-05 | 2021-12-03 | 中南大学 | Preparation method of high-airtightness oxygen-free copper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101274363A (en) | 2008-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101274363B (en) | Method for continuously converting and casting oxygen-free copper ingot | |
| CN101274364B (en) | Furnace for converting and casting oxygen-free copper ingot | |
| CN106498180B (en) | A kind of process units and method of high-purity oxygen-free copper ingot blank | |
| CN101377010A (en) | Device and method for manufacturing solar grade polysilicon | |
| CN203495173U (en) | Large-diameter high-purity oxygen-free copper casting blank horizontal continuous casting conjoined furnace | |
| CN102219221B (en) | Method for purifying polycrystalline silicon by directional solidification and slag refining | |
| CN107177738B (en) | Oxygen-free copper foundry furnace | |
| CN102564131A (en) | Device and method for continuous smelting of high-purity high-conductivity copper | |
| CN110241326A (en) | Alloying oxygen-free copper and preparation method thereof | |
| CN102266943A (en) | Method for preparing high-purity molybdenum electrode | |
| CN102219219A (en) | Method and equipment for purifying polycrystalline silicon by directional solidification and filter slag melting | |
| CN101850976A (en) | Method for removing boron in silicon metal in transfer ladle | |
| Pizzini | Solar grade silicon as a potential candidate material for low-cost terrestrial solar cells | |
| CN202517021U (en) | Device for preparing low-oxygen or oxygen-free copper tube | |
| CN203960312U (en) | The antivacuum casting apparatus of a kind of high heat pipe | |
| CN202047116U (en) | Continuous oxygen-free copper degassing and casting device | |
| CN112725634A (en) | Production process method of low-oxygen large-tonnage oxygen-free copper ingot | |
| CN202519320U (en) | Continuous high-purity high-conductivity smelting device | |
| CN201186349Y (en) | Oxygen-free copper ingot continuous converting casting furnace | |
| CN115852166B (en) | Method for smelting metallized nickel matte through nickel concentrate oxygen enrichment | |
| CN102616787B (en) | Method for removing boron-phosphorus impurities from silicon metal | |
| CN112110450A (en) | Method for removing impurity boron in metallurgical-grade silicon | |
| CN102001664B (en) | Double-chamber duplex vacuum circulation degassing furnace and preparation of solar grade polycrystalline silicon | |
| CN108149025A (en) | A kind of preparation method of high-performance oxygen-free copper bar | |
| CN107737895A (en) | A kind of oxygen-free copper bar preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230720 Address after: 730300 Southeast of the intersection of Huashan Road and Wujiang Street, Lanzhou New Area, Lanzhou, Gansu Province Patentee after: Gansu Hailiang New Energy Materials Co.,Ltd. Patentee after: ZHEJIANG HAILIANG Co.,Ltd. Address before: 311814, Zhejiang City, Zhuji province shop town Meizhou pond Patentee before: ZHEJIANG HAILIANG Co.,Ltd. |