CN100462455C - Method for smelting pure copper or high-copper alloy raw material - Google Patents
Method for smelting pure copper or high-copper alloy raw material Download PDFInfo
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- CN100462455C CN100462455C CNB2007100661343A CN200710066134A CN100462455C CN 100462455 C CN100462455 C CN 100462455C CN B2007100661343 A CNB2007100661343 A CN B2007100661343A CN 200710066134 A CN200710066134 A CN 200710066134A CN 100462455 C CN100462455 C CN 100462455C
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Abstract
The invention relates to a method for smelting pure copper or high-content copper alloy materials, belonging to the field of metal metallurgy. The method comprises copper raw material pretreatment, smelting and deoxidation steps, wherein the copper raw material is pure copper with a copper content above 99.995 percent or a high-content copper alloy with a copper content no less than 90 percent. The copper bar is decontaminated and preheated to 500-600 DEG C and then fed into a smelting furnace. Shield gas atmospheres against oxidation are formed on the surface of copper raw material from the beginning of the smelting process of pure copper or high-content copper alloy. The shield gas is one or more gases selected from the group including N2, H2, CO and C2H2 or an inert gas such as Ar gas; and can inhibit the oxidation of molten liquid of pure copper or high-content copper alloy. The inlet of the mixed gas is 0.2-1.01 per minute. The smelting process is stopped at 1150-1200 DEG C after the copper bar is melted. The invention can efficiently prevent the oxidation of molten liquid during the smelting process, improve the fluidity, inhibit the reduction of cast product quality due to oxide interference, and increase the purity of molten liquid and the rate of qualified products.
Description
Technical field:
The present invention relates to the method for a kind of smelting pure copper or high-copper alloy raw material, belong to the metal metallurgy smelting field.Be used for the melting of induction motor copper cage rotor die casting raw material.
Technical background:
At present, adopting pressure casting method production of copper rotor has been a kind of taking advantage of a favourable situation.But, require the pouring temperature of copper higher in the press casting procedure, and raise along with temperature in the melting process, liquation will produce oxidation in a large number, the many more pouring flow rates of oxidation are poor more, and then cause copper rotor many pores or short circuit to occur, do not reach the job requirement and the standard of rotor.
Current, prevent that the method for liquation oxidation from having following several: (1) adds phosphor copper or reductors such as zinc, lead in liquation; (2) in liquation, add the insulating covering agents such as mixture of charcoal, plant ash or borax and glass.Aforesaid method can reach certain deoxidation effect, but still has following difficulty in fusion process:
1, add reductor such as phosphor-copper after, can have a strong impact on the electric conductivity of copper rotor;
2, the residue of reductor product and insulating covering agent thoroughly remove difficulty, influenced the purity of copper liquid or alloy molten liquid, cause the decline of casting quality.
Through literature search, do not see the open report identical with the technology of the present invention.
Summary of the invention:
The objective of the invention is to overcome the deficiency of prior art, and a kind of fine copper and copper alloy oxidation in fusion process that can effectively prevent is provided, improve the purity of copper liquid or alloy molten liquid, improve the melting method of induction motor copper cage rotor product percent of pass.
Melting method of the present invention comprises copper raw material pre-treatment, melting and deoxidation step, wherein:
A, the pre-treatment of copper material: the copper material is fine copper or high-copper alloy, and the copper content of fine copper is greater than 99.995%, and copper content is not less than 90% in the high-copper alloy.Fine copper or high-copper alloy raw material are processed into the copper bar that length is 4～6cm.The copper bar is removed dirt through blast, goes down except that moisture shove charge melting subsequently 500～600 ℃ of preheating temperatures.First batch of black furnace melting can be with the stove preheating.
B, melting operation: melting equipment of the present invention is conventional medium-frequency induction furnace, thermopair and plumbago crucible, infrared thermometer etc.Behind copper bar shove charge melting equipment, the intermediate frequency furnace heating power is raised to 20KW, carry out melting to being upgraded to 40KW again after the copper bar reddens, when the copper bar when all fusing and temperature are at 1150～1250 ℃ melting finish.
C, deoxidation step: form the shielding gas atmosphere of anti-oxidation in fine copper and high-copper alloy fusion process on copper material surface, employed gas is N
2With H
2, CO, C
2H
2Mixed gas, N
2With C
2H
2With the mixed of 2:1, and N
2With H
2Or CO all mixes more than 95% to contain nitrogen, and the feeding amount of mixed gas is 0.2～1.0L/min.To suppress the oxidation of fine copper and high-copper alloy liquation, improve liquidity whereby, and sneaking into of inhibited oxidation thing causes casting quality to descend.
Be example now, the provide protection of mixed gas in fusion process be described with acetylene and nitrogen mixture body:
2C
2H
2+5O
2＝4CO
2↑+2H
2O↑
2C
2H
2+O
2＝4C+2H
2O↑
C+2Cu
2O＝4Cu+CO
2↑
The advantage of the inventive method is: can effectively prevent the oxidation in fusion process of fine copper and copper alloy, improve the purity of copper liquid or alloy molten liquid, improve the induction motor copper cage rotor product percent of pass.
Embodiment:
Melting equipment select market sale can realize that automatic stirring, capacitor box and smelting furnace are integral, heating power is at intermediate frequency furnace, thermopair and plumbago crucible, the infrared thermometer etc. of 0～100KW.
Embodiment 1: the copper material of 10 horsepowers of copper rotors of melting die casting
Fusion process is:
1, copper material pre-treatment: the copper material is the fine copper of 6.4kg, and the copper content of fine copper is greater than 99.995%.The fine copper raw material is processed into the copper bar that length is 4cm.The copper bar is removed dirt through blast, goes down except that moisture 500 ℃ of preheating temperatures, and the temperature of packing into subsequently is the interior melting of 500 ℃ crucible.
2, melting operation: the copper bar is packed into behind the crucible, and the intermediate frequency furnace heating power is upgraded to 20KW, carries out melting to being upgraded to 40KW again after the copper bar reddens, when the copper bar when all fusing and temperature are at 1150～1250 ℃ melting finish.
3, deoxidation step: begin to finish to melting from melting, in melting equipment, feed mixed gas by the gas passage on the melting equipment, mixed gas is nitrogen and the acetylene gas gas with the 2:1 mixed, and the feeding amount of mixed gas is 0.2～1.0L/min.。
The liquation of aforesaid method melting obtains product after die casting.
Embodiment 2:
Substantially with embodiment 1.Difference is: the copper material is the high-copper alloy of 6.4kg, and copper content is not less than 95% in the high-copper alloy.Raw material is processed into the copper bar that length is 5cm, and the copper bar is removed dirt through blast, goes down except that moisture 550 ℃ of preheating temperatures, and the temperature of packing into subsequently is the interior melting of 550 ℃ crucible.Mixed gas is the mixed gas of 95% above nitrogen and CO, and wherein a nitrogen content is more than 95%, and the feeding flow is 0.2～1.0L/min.。
Embodiment 3:
Substantially with embodiment 1.Difference is: the copper material is the high-copper alloy of 6.4kg, and copper content is not less than 90% in the high-copper alloy.Raw material is processed into the copper bar that length is 6cm, and the copper bar is removed dirt through blast, goes down except that moisture 600 ℃ of preheating temperatures, and the temperature of packing into subsequently is the interior melting of 600 ℃ crucible.Mixed gas is nitrogen and H
2Gas, wherein a nitrogen content is more than 95%, and the feeding flow is 0.2～1.0L/min.。
By evidence,, the oxygen level of cast copper liquid can be reduced to 300～500ppm by the fusion process of mixed gas protected fine copper and high-copper alloy.
Claims (1)
1. the method for smelting pure copper or high-copper alloy raw material comprises copper raw material pre-treatment, melting and deoxidation step, it is characterized in that:
A, the pre-treatment of copper material: copper content is not less than 90% high-copper alloy raw material greater than 99.995% fine copper or copper content is processed into the copper bar that length is 4～6cm, the copper bar is removed dirt through blast, go down except that moisture shove charge melting subsequently 500～600 ℃ of preheating temperatures; First batch of black furnace melting is with the stove preheating;
B, melting operation: after the copper bar is packed melting equipment into, the intermediate frequency furnace heating power is upgraded to 20KW, carries out melting to being upgraded to 40KW again after the copper bar reddens, when the copper bar when all fusing and temperature are at 1150～1250 ℃ melting finish;
C. form the shielding gas atmosphere of anti-oxidation in fine copper or high-copper alloy fusion process on copper material surface, employed gas is N
2With H
2, or CO or C
2H
2Mixed gas, N
2With C
2H
2With the mixed of 2:1, and N
2With H
2Or the mixed gas of CO all mixes more than 95% to contain nitrogen, and the feeding amount of mixed gas is 0.2～1.0L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100661343A CN100462455C (en) | 2007-08-24 | 2007-08-24 | Method for smelting pure copper or high-copper alloy raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100661343A CN100462455C (en) | 2007-08-24 | 2007-08-24 | Method for smelting pure copper or high-copper alloy raw material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101104889A CN101104889A (en) | 2008-01-16 |
| CN100462455C true CN100462455C (en) | 2009-02-18 |
Family
ID=38998967
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100661343A Expired - Fee Related CN100462455C (en) | 2007-08-24 | 2007-08-24 | Method for smelting pure copper or high-copper alloy raw material |
Country Status (1)
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|---|---|
| CN (1) | CN100462455C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886802A (en) * | 2016-04-26 | 2016-08-24 | 商学永 | Method for smelting copper |
| CN105880521B (en) * | 2016-05-03 | 2018-09-14 | 宋照峰 | Copper rotor casting method |
| CN105964971B (en) * | 2016-05-27 | 2017-12-08 | 宋照峰 | Vacuum semisolid pressure casting copper rotor method |
| CN106011513B (en) * | 2016-07-28 | 2018-07-17 | 张彦才 | A kind of aluminum or aluminum alloy melting coverture and preparation method thereof |
| CN108165763A (en) * | 2017-12-25 | 2018-06-15 | 安徽晋源铜业有限公司 | A kind of intelligence copper rod production purity improves system |
| CN108330293A (en) * | 2018-04-09 | 2018-07-27 | 浙江钜丰冲压科技有限公司 | A kind of copper smelting method being exclusively used in motor copper rotor |
| CN111663050A (en) * | 2020-05-05 | 2020-09-15 | 中色（天津）特种材料有限公司 | Copper waste pretreatment for copper continuous casting process and method for smelting copper by using copper waste pretreatment |
| CN111842820A (en) * | 2020-07-25 | 2020-10-30 | 恒吉集团实业有限公司 | Copper rod smelting anti-oxidation process |
| CN114561554A (en) * | 2021-07-07 | 2022-05-31 | 浙江海亮股份有限公司 | Vertical furnace-horizontal continuous casting copper casting blank process |
| CN114535584A (en) * | 2022-04-07 | 2022-05-27 | 新乡市七星钎焊科技有限公司 | Production process of particle phosphorus-copper alloy |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0499236A (en) * | 1990-08-08 | 1992-03-31 | Mitsubishi Materials Corp | Manufacture of extra low oxygen copper |
| JPH06299261A (en) * | 1993-04-12 | 1994-10-25 | Kobe Steel Ltd | Method for cleaning copper or copper alloy |
| DE19844667A1 (en) * | 1998-09-29 | 2000-03-30 | Linde Ag | Process for polishing copper |
| DE10007441A1 (en) * | 2000-02-18 | 2001-08-23 | Linde Gas Ag | Poling copper in the molten state comprises feeding a gas mixture of hydrogen, nitrogen and carbon monoxide as gaseous deoxidizing agent into the melt |
| CN1390962A (en) * | 2002-05-22 | 2003-01-15 | 金隆铜业有限公司 | Process for refining raw copper bynon-oxidizing nitrogen-doping reducing pyrometallurgy |
| CN1504585A (en) * | 2002-11-29 | 2004-06-16 | 倬 李 | Continuous production method for industrial grade high purity copper |
| CN2673882Y (en) * | 2003-07-10 | 2005-01-26 | 上海大学 | Copper smelter with function of removing oxygen |
| CN1931474A (en) * | 2006-07-25 | 2007-03-21 | 周西省 | Casting process of copper squirrel rotor |
-
2007
- 2007-08-24 CN CNB2007100661343A patent/CN100462455C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0499236A (en) * | 1990-08-08 | 1992-03-31 | Mitsubishi Materials Corp | Manufacture of extra low oxygen copper |
| JPH06299261A (en) * | 1993-04-12 | 1994-10-25 | Kobe Steel Ltd | Method for cleaning copper or copper alloy |
| DE19844667A1 (en) * | 1998-09-29 | 2000-03-30 | Linde Ag | Process for polishing copper |
| DE10007441A1 (en) * | 2000-02-18 | 2001-08-23 | Linde Gas Ag | Poling copper in the molten state comprises feeding a gas mixture of hydrogen, nitrogen and carbon monoxide as gaseous deoxidizing agent into the melt |
| CN1390962A (en) * | 2002-05-22 | 2003-01-15 | 金隆铜业有限公司 | Process for refining raw copper bynon-oxidizing nitrogen-doping reducing pyrometallurgy |
| CN1504585A (en) * | 2002-11-29 | 2004-06-16 | 倬 李 | Continuous production method for industrial grade high purity copper |
| CN2673882Y (en) * | 2003-07-10 | 2005-01-26 | 上海大学 | Copper smelter with function of removing oxygen |
| CN1931474A (en) * | 2006-07-25 | 2007-03-21 | 周西省 | Casting process of copper squirrel rotor |
Non-Patent Citations (4)
| Title |
|---|
| 纯铜熔炼及铸件缺陷分析和预防措施. 苏义详等.铸造，第54卷第9期. 2005 |
| 纯铜熔炼及铸件缺陷分析和预防措施. 苏义详等.铸造，第54卷第9期. 2005 * |
| 铸造用纯铜及铜合金的熔炼工艺. 聂小武.机械工人.热加工，第1期. 2006 |
| 铸造用纯铜及铜合金的熔炼工艺. 聂小武.机械工人.热加工，第1期. 2006 * |
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| Publication number | Publication date |
|---|---|
| CN101104889A (en) | 2008-01-16 |
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Granted publication date: 20090218 Termination date: 20190824 |