CN1279192C - Technology of producing oxygenless copper using waste red copper - Google Patents
Technology of producing oxygenless copper using waste red copper Download PDFInfo
- Publication number
- CN1279192C CN1279192C CNB2003101098507A CN200310109850A CN1279192C CN 1279192 C CN1279192 C CN 1279192C CN B2003101098507 A CNB2003101098507 A CN B2003101098507A CN 200310109850 A CN200310109850 A CN 200310109850A CN 1279192 C CN1279192 C CN 1279192C
- Authority
- CN
- China
- Prior art keywords
- red copper
- furnace
- copper
- melt
- old
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a device using waste red copper to produce oxygen-free copper, which belongs to the field of smelting metal. Firstly, the present invention sorts the waste red copper; the sorted waste red copper is baked and directly fed into a furnace after washed and dried; then, compressed air or oxygen-enriched air is blown into a smelting furnace through a graphite pipe to oxidize impurities in fusant; fluxing agents are used for covering the smelting furnace, and graphite powder is used for covering a maintaining furnace; foam ceramic filtration plates are arranged at both ends of a flow channel, and a spodium filtration and deoxidation device is arranged in the maintaining furnace; finally, the fusant entering the maintaining furnace totally enters the spodium filtration and deoxidation device for thorough deoxidation. The process is used, the waste red copper has uniform fusant components, simple working procedure and low energy consumption, and the occupied proportion of furnace charge by the dosage of the waste red copper is not limited; the oxygen content of the product is lower than 10 ppm, or even less than 5 ppm, and the electric resistivity is not more than 0.017241 omega. Mm<2>. m<-1>.
Description
Technical field
What the present invention relates to is a kind of technology of producing oxygen free copper, and particularly a kind of technology of utilizing old and useless red copper to produce oxygen free copper belongs to the Metal smelting field.
Background technology
At present, the production of oxygen free copper is very high to the requirement of raw material, and the high-quality cathode plate of the no copper beans in surface and the particle of blooming can use behind the excision hangers.Its production technique is: main frequency furnace reducing atmosphere melting (charcoal covering)-insulation (Graphite Powder 99 covering)-up casting-semifinished or finished goods.The method that old and useless red copper is produced oxygen free copper mainly contains two classes: the one, and traditional indirect utilization is about to old and useless red copper and is smelted into anode copper, re-uses after being electrolyzed to produce cathode copper.This indirect utilization complex procedures, the cycle is long, energy consumption is high and cause environmental pollution; The 2nd, direct utilization.By retrieval, people such as Tong Gulin are in " casting ", and 1999, the 48 rolled up for the 5th phases: delivered " utilizing old and useless red copper to produce the approach of up casting oxygen free copper " literary composition on 23～24, in this article stove is directly thrown in old and useless red copper letter sorting packing back, add the copper rare earth alloy simultaneously and purify melt.Though this directly utilizes technology simple to operate, can only remove small amount of impurities owing to add the copper rare earth, so old and useless red copper can only account for 10～20% of furnace charge total amount, and also since the bath composition fluctuation, unstable product quality.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of technology of utilizing old and useless red copper to produce oxygen free copper is provided, directly utilize old and useless red copper to produce oxygen free copper.Adopt the oxidizing atmosphere melting, the impurity element in the old and useless red copper is converted into oxide compound, remove dissolved hydrogen in the melt simultaneously; Use flux refining technology and foamed ceramic filter plate two-stage filtration, remove oxide impurity; Adopt the block charcoal filtering melt of incinerating, make in the melt oxygen level reduce to 10ppm, even below the 5ppm, the resistivity of goods is not more than 0.017241 Ω .mm
2.m
-1
The present invention is achieved by the following technical solutions, the inventive method is as follows: at first old and useless red copper is sorted, old and useless red copper after the letter sorting is 400～500 ℃ of bakings, after washing and oven dry, directly throw stove again, in smelting furnace, blast pressurized air or oxygen-rich air by carbon tube, with the oxidation of impurities in the melt, adopt flux to cover smelting furnace, adopt Graphite Powder 99 covering and heat insulating stove, foamed ceramic filter plate is installed at the chute two ends, the charcoal filtering device for deoxidizing is installed in holding furnace, and the melt that enters holding furnace all enters the thorough deoxidation of charcoal filtering device for deoxidizing.
Below the present invention is done further qualification, processing step is as follows:
(1) the letter sorting old and useless red copper is removed wherein miscellaneous aluminium wire, the first-class metallic impurity of soldering;
(2) useless red copper is removed surface and oil contaminant and other dirt settling 400～500 ℃ of bakings, drops into melting in the smelting furnace after washing and oven dry;
(3) blast pressurized air or oxygen-rich air by carbon tube in smelting furnace, making impurity conversion is oxide compound, drives away dissolved hydrogen in the melt simultaneously;
(4) the smelting furnace molten bath adopts neutral flux to cover, the molten intravital oxide inclusion of absorption;
(5) at the chute two ends that connect between smelting furnace and the holding furnace one foamed ceramic filter plate is installed respectively, the aperture of first screen plate is greater than the aperture of second screen plate, and they form the two-stage filtration to melt, have guaranteed that oxide impurity can't enter holding furnace;
(6) the holding furnace molten bath adopts Graphite Powder 99 tightly to cover;
(7) the filtration device for deoxidizing is installed in holding furnace, the melt that enters holding furnace must pass through this filtration device for deoxidizing, this filtration device for deoxidizing frame material selects for use silicon carbide in conjunction with silicon nitride ceramics or graphite, the main component of filtration medium is the calcining charcoal, its deoxidation speed is fast, and can not cause secondary pollution to melt.Melt is under the diffusive deoxidation effect of filtering deoxidation and weld pool surface Graphite Powder 99, and oxygen level reduces rapidly.
The copper melts impurity removal process that the present invention has adopted oxidizing semlting to combine with flux slagging-off, the slagging-off of secondary foam ceramic filter, old and useless red copper can directly use as furnace charge after simple pre-treatment, adopt the oxidizing atmosphere melting, use flux slag making and foamed ceramics two-stage filtration, substantially remove the impurity element of bringing melt by old and useless red copper into, after filtering device for deoxidizing, oxygen level reduces rapidly in the melt.After adopting this technology, the bath composition of old and useless red copper is even, and operation is simple, energy consumption is low, and the old and useless red copper consumption to account for the ratio of furnace charge unrestricted, the oxygen level of goods is lower than 10ppm, even below 5ppm, resistivity is not more than 0.017241 Ω .mm
2.m
-1
Description of drawings
Fig. 1 process flow diagram of the present invention
Embodiment
As shown in Figure 1, provide following specific embodiment in conjunction with content of the present invention:
With old and useless red copper by requirement pre-treatment of the present invention after, allocate in the furnace charge by different ratios and to use.Guarantee that oxygen concn reaches 0.2～0.4% weight percent in the oxidation later stage melt, the pore diameter range of ceramic filter plate is 10-50ppi (number in the hole of arranging in the per inch length), the flux layer thickness range is 5-8mm, filters deaeration time 10～60s, can produce qualified oxygen free copper goods.Concrete effect such as following table:
| Embodiment | Old and useless red copper amount/weight percent | Flux layer thickness/mm | Screen plate configuration/ppi | Filter deaeration time/s | Oxygen concn/ppm | Resistivity/Ω .mm 2.m -1 | |
| First filter plate | Second filter plate | ||||||
| 1 | 10 | 5 | 10 | 50 | 15 | 5 | 0.017130 |
| 2 | 20 | 5 | 15 | 50 | 18 | 9 | 0.017075 |
| 3 | 30 | 6 | 15 | 40 | 25 | 4 | 0.017195 |
| 4 | 50 | 7 | 10 | 40 | 30 | 4 | 0.017172 |
| 5 | 100 | 8 | 10 | 50 | 60 | 8 | 0.017119 |
Claims (2)
1, a kind of technology of utilizing old and useless red copper to produce oxygen free copper, it is characterized in that, at first old and useless red copper is sorted, old and useless red copper after the letter sorting toasts, after washing and oven dry, directly throw stove again, in smelting furnace, blast pressurized air or oxygen-rich air by carbon tube then, with the oxidation of impurities in the melt, adopt flux to cover smelting furnace, adopt Graphite Powder 99 covering and heat insulating stove, at the chute two ends foamed ceramic filter plate is installed, the charcoal filtering device for deoxidizing is installed in holding furnace, the melt that finally enters holding furnace all enters the thorough deoxidation of charcoal filtering device for deoxidizing.
2, the technology of utilizing old and useless red copper to produce oxygen free copper according to claim 1 is characterized in that, may further comprise the steps:
(1) the letter sorting old and useless red copper is removed wherein miscellaneous aluminium wire, a soldering metallic impurity;
(2) useless red copper is removed surface and oil contaminant and dirt settling 400～500 ℃ of bakings, drops into melting in the smelting furnace after washing and oven dry;
(3) blast pressurized air or oxygen-rich air by carbon tube in smelting furnace, making impurity conversion is oxide compound, drives away dissolved hydrogen in the melt simultaneously;
(4) the smelting furnace molten bath adopts neutral flux to cover, the molten intravital oxide inclusion of absorption;
(5) at the chute two ends that connect between smelting furnace and the holding furnace one foamed ceramic filter plate is installed respectively, the aperture of first screen plate is greater than the aperture of second screen plate, and they form the two-stage filtration to melt, avoid oxide compound to enter holding furnace;
(6) the holding furnace molten bath adopts Graphite Powder 99 to cover;
(7) the filtration device for deoxidizing is installed in holding furnace, the melt that enters holding furnace is through this filtration device for deoxidizing, this filtration device for deoxidizing frame material selects for use silicon carbide in conjunction with silicon nitride ceramics or graphite, the composition of filtration medium is the calcining charcoal, melt is under the diffusive deoxidation effect of filtering deoxidation and weld pool surface Graphite Powder 99, and oxygen level reduces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101098507A CN1279192C (en) | 2003-12-30 | 2003-12-30 | Technology of producing oxygenless copper using waste red copper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101098507A CN1279192C (en) | 2003-12-30 | 2003-12-30 | Technology of producing oxygenless copper using waste red copper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1556231A CN1556231A (en) | 2004-12-22 |
| CN1279192C true CN1279192C (en) | 2006-10-11 |
Family
ID=34335409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101098507A Expired - Fee Related CN1279192C (en) | 2003-12-30 | 2003-12-30 | Technology of producing oxygenless copper using waste red copper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1279192C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102234725A (en) * | 2010-04-24 | 2011-11-09 | 大冶有色金属集团控股有限公司 | Continuous production technology for miscellaneous copper recycling and positive plate casting |
| CN102220511B (en) * | 2011-05-10 | 2012-11-21 | 济南宝世达实业发展有限公司 | Oxygen-free copper tube and machining method thereof |
| CN102864310A (en) * | 2012-10-10 | 2013-01-09 | 芜湖恒泰有色线材股份有限公司 | Method for producing anaerobic polished copper bars by waste red copper wires |
| CN103589876A (en) * | 2013-11-27 | 2014-02-19 | 江苏环胜铜业有限公司 | Method for producing oxygen-free copper by utilizing waste red copper |
| CN104313334B (en) * | 2014-11-14 | 2016-06-01 | 宁波杭桥铜业有限公司 | A kind of copper scrap pre-treatment and refinery practice |
| CN104911374A (en) * | 2015-04-27 | 2015-09-16 | 安徽永杰铜业有限公司 | Copper smelting processing method |
| CN108034837B (en) * | 2017-11-28 | 2020-10-16 | 上海龙阳精密复合铜管有限公司 | Production method for quickly removing red copper furnace liquid impurities |
| CN108998680A (en) * | 2018-08-03 | 2018-12-14 | 湖南金龙国际铜业有限公司 | The technique for directly preparing oxygen-free copper using useless recycled copper |
-
2003
- 2003-12-30 CN CNB2003101098507A patent/CN1279192C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1556231A (en) | 2004-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102433438B (en) | Treatment method of scrap copper | |
| CN1279192C (en) | Technology of producing oxygenless copper using waste red copper | |
| CN101871052B (en) | Method for purifying aluminum and aluminum alloy melt | |
| CN104818411B (en) | A kind of rare-earth-Al-Mg alloy material and preparation method thereof | |
| CN101217074A (en) | A silver tin/copper oxide compound electrical contact and preparation method | |
| CN114774696B (en) | Clean and efficient method for capturing and enriching platinum group metals in catalyst | |
| CN111893335A (en) | Method for regenerating and recycling scrap of aluminum-lithium alloy waste | |
| CN109338211A (en) | A kind of novel melting metallic fiber FeCrAlB alloy material and preparation method | |
| CN104131198A (en) | Rare earth electron aluminum foil | |
| CN102610294A (en) | Energy-saving strong-strength aluminum alloy wire and manufacturing method thereof | |
| CN104213001A (en) | Low-manganese aluminum alloy for cathode foil and preparation method thereof | |
| CN1270235A (en) | Process for treating low-grade anode mud | |
| CN112725634A (en) | Production process method of low-oxygen large-tonnage oxygen-free copper ingot | |
| CN105132767B (en) | A kind of high connductivity resistance to compression creep aluminium alloy and its manufacture method | |
| CN111705223B (en) | Method for co-processing lead glass and waste catalyst | |
| CN102703728A (en) | Recovery treatment process of brass slag | |
| CN116814974A (en) | Method for recycling platinum group metals in automobile waste catalysts by taking ferronickel tailings as flux through pyrogenic process | |
| CN1325673C (en) | Device for producing oxygen less copper utilizing waste red copper | |
| CN113897494B (en) | Preparation method of electric stranded wire | |
| CN111926199B (en) | Pre-smelting process of electrolytic aluminum liquid | |
| CN112375871B (en) | Method for detinning in pure steel smelting process | |
| CN114507793A (en) | High-strength high-conductivity Cu-Zn-Cr-Zr copper alloy, and preparation method and application thereof | |
| CN109457116B (en) | Financial separation method for neodymium iron boron waste flash roasting supergravity slag | |
| CN116875873B (en) | Method for recycling cord thread/tire bead waste steel wire and preparing wire rod by using same | |
| CN1053927C (en) | Manufacturing method of iron-aluminium alloy wire material and use |
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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Changshu Jinggong Mould Manufacturing Co., Ltd. Assignor: Shanghai Jiao Tong University Contract fulfillment period: 2009.7.9 to 2014.7.8 Contract record no.: 2009320001317 Denomination of invention: Technology of producing oxygenless copper using waste red copper Granted publication date: 20061011 License type: Exclusive license Record date: 2009.7.30 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.7.9 TO 2014.7.8; CHANGE OF CONTRACT Name of requester: CHANGSHU CITY FINE-WORK MOULD MANUFACTURING CO., L Effective date: 20090730 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061011 Termination date: 20171230 |