CN102489510A - Casting method of oxygen-free copper rod - Google Patents

Casting method of oxygen-free copper rod Download PDF

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Publication number
CN102489510A
CN102489510A CN2011104072931A CN201110407293A CN102489510A CN 102489510 A CN102489510 A CN 102489510A CN 2011104072931 A CN2011104072931 A CN 2011104072931A CN 201110407293 A CN201110407293 A CN 201110407293A CN 102489510 A CN102489510 A CN 102489510A
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China
Prior art keywords
copper
oxygen
casting
casting method
temperature
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Pending
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CN2011104072931A
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Chinese (zh)
Inventor
周俊民
蒋加平
赵明
周晓安
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JIANGSU CHENLONG TECHNOLOGY CO LTD
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JIANGSU CHENLONG TECHNOLOGY CO LTD
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Priority to CN2011104072931A priority Critical patent/CN102489510A/en
Publication of CN102489510A publication Critical patent/CN102489510A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a casting method of an oxygen-free copper rod. The casting method of the oxygen-free copper rod comprises the following steps of: 1) setting a temperature of equipment; 2) feeding a copper raw material; 3) adjusting the content of carbon monoxide; 4) reducing liquid copper; 5) oxygenating the liquid copper; 6) casting a blank by a crystallization wheel trough; and 7) rolling a copper casting blank. The casting method of the oxygen-free copper rod, provided by the invention, has the advantages that: the purity of the copper rod is not less than 99.99%, the yield is more than 1000 tons in one day, the resistivity of the copper rod at 20 DEG C is 0.016888 omegamm<2>/m, the elongation is 42% and the torsion revolution reaches 40; furthermore, the energy and the quantity are saved, and the surface of the copper rod is bright.

Description

A kind of casting method of oxygen-free copper bar
Technical field
The present invention relates to casting field, be specifically related to the casting method of oxygen-free copper bar.
Background technology
Copper is widely used in each industrial department as the excellent metal material of a kind of various aspects of performance.When other impurity content exceeding indexs in the copper, can have influence on the electric conductivity and the mechanical performance of copper greatly.Metallurgy industry generally requires the purity of copper to be not less than 99.95%; But for wires and cables industry; Generally require the purity of copper to be not less than 99.99%, only reach such index, could guarantee the electric conductivity that electric wire is excellent; Improve its service life, create more economic benefit and social benefit.
At present, the processing of copper bar is seen so that casting and rolling process comparatively more.Traditional continuous casting and rolling process for production production efficiency is very low; Main cause is: melting furnace in traditional continuous casting and rolling production line, holding furnace, casting ladle isometric(al) are too small; According to statistics, output was 200~300 tons in one day, and the purity of copper can not remain on continuously 99.99% and more than; And the loss of electric energy, the loss of coal, the loss of cooling fluid is bigger.
Summary of the invention
The object of the invention is exactly to above-mentioned defective of the prior art, and a kind of casting method that improves output and can reach the oxygen-free copper bar of quality requirement is provided.
To achieve these goals, technical scheme provided by the invention is: a kind of casting method of oxygen-free copper bar includes following steps:
1) the melting furnace temperature is arranged on 1120~1130 ℃, the holding furnace temperature is arranged on 1125~1135 ℃;
2) with copper raw material with every 50-70 second 1 ton speed throw in into melting furnace;
3) in step 2) fusing time in, be 0.4%-3% according to the content of carbon monoxide in the carbonyl analyzer adjustment melting furnace, and remove the impurity that swims in the surface through skimming gate, the frequency of skimming be every 2-4 hour once;
4) the liquid copper after the fusing that obtains of step 3) flows in the holding furnace through the chute pushing off the slag, and holding furnace is 15 tonnes, begins in holding furnace, to add timber before the casting and carries out redox reaction, and the addition of said timber is the 0.4-0.6% of liquid weight of copper;
5) the liquid copper after the reduction that obtains of step 4) flows in the casting ladle after through the downtand pushing off the slag, and oxygenating simultaneously, and the casting ladle temperature is controlled to be 1105 ℃~1125 ℃, is provided with the levels pushing off the slag in the casting ladle;
6) the liquid copper after the oxygenating that obtains of step 5) flows in the crystallization race through the following head piece of casting ladle, cools off and strand through cooling water, and strand speed is 45 tons/hour;
7) the casting in bronze base that obtains of step 6) is rolled and obtains oxygen-free copper bar, and rolling temperature is controlled to be, and getting into before the milling train is 850 ℃, get into milling train after temperature be controlled to be 800 ℃.
In the casting method of above-mentioned oxygen-free copper bar, the melting furnace temperature in the said step 1) is arranged on 1125 ℃, and the holding furnace temperature is arranged on 1130 ℃.
In the casting method of above-mentioned oxygen-free copper bar, said step 2) copper raw material in is one or more the mixture in electrolysis copper coin, copper scrap bar and the cable waste copper conductor.
In the casting method of above-mentioned oxygen-free copper bar, said step 2) copper raw material in is thrown in into melting furnace with per 60 seconds 1 ton speed.
In the casting method of above-mentioned oxygen-free copper bar, in the said step 3) in the adjustment melting furnace content of carbon monoxide be 1.7%, the frequency of skimming be per 3 hours once.
In the casting method of above-mentioned oxygen-free copper bar, the addition of timber is 0.5% of a liquid weight of copper in the said step 4).
In the casting method of above-mentioned oxygen-free copper bar, in the said step 5), the casting ladle temperature is controlled to be 1115 ℃.
Beneficial effect of the present invention is: the purity of copper bar is not less than 99.99%, one day output and reaches more than 1000 ton, and 20 ℃ of resistivity of copper bar are 0.016888 Ω mm2/m, and percentage elongation is 42%, and reverse revolution and reach 40, and energy-conservation joint amount, copper bar surface-brightening.
The specific embodiment
Embodiment 1:
At first the melting furnace temperature is arranged on 1120~1130 ℃, the holding furnace temperature is arranged on 1125~1130 ℃, the casting ladle temperature is set to 1105~1125 ℃, in the crystallization race and on the steel band, sprays carbon; Then electrolysis copper coin and copper scrap bar, cable waste copper conductor are thrown in high-temperature melting furnace with the speed of 1 ton of average per minute; The melting furnace temperature is controlled at about 1130 ℃, and raw material to be added all are fused into liquid; During this period, according to the CO analyzer, the content of adjustment CO is with the control oxygen content; Because most of impurity proportion is littler than copper, swim in liquid copper surface, we can remove through the impurity manual work that skimming gate will swim in the surface, the frequency of skimming be 2~4 hours once; Proportion is greater than the impurity (being mostly gold, silver) of copper proportion, and the deposition bottom is attracted on the flame retardant coating of furnace bottom.Liquid copper flows in the holding furnace through chute; In the chute process of flowing through, carry out pushing off the slag to improve the purity of copper, the holding furnace temperature is controlled to be 1130 ± 5 ℃; The holding furnace optimum capacity is about 15 tons during production; Be convenient to energy-conservation with improve speed of production, 5 ‰ timber with liquid weight of copper before beginning to cast joins in the holding furnace, carries out redox.To reduce then after the good liquid copper process downtand pushing off the slag, flow in the casting ladle, wherein; Carry out oxygenation in the downtand exit through tracheae, to replenish oxygen content, the casting ladle temperature is controlled to be 1105~1125 ℃; Liquid copper can further purify liquid copper through the levels pushing off the slag in casting ladle; At last, liquid copper flows in the crystallization race through the following head piece of casting ladle, through cooling water cool off, strand; Race on the crystallizing wheel is special refractory material, in advance should be in race, spray carbon on the steel band, and act as: protection cast wheel, steel band do not receive the infringement of high temperature copper water, come the crystallization control temperature through spray carbon amount, help the demoulding in the crystallization race of casting in bronze base.Through adopting aforesaid way, make strand speed be not less than 45 tons/hour; Temperature was controlled to be about 850 ℃ before the casting in bronze base got into milling train, get into milling train after temperature be controlled to be 800 ℃, rolling through 13 road milling trains obtains the copper bar that we need; Simultaneously, the copper bar is that 3% alcohol pickling, waxing obtain glitter copper lever through over-richness.
What should explain at last is: the above is merely the preferred embodiments of the present invention; Be not limited to the present invention; Although the present invention has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1. the casting method of an oxygen-free copper bar is characterized in that: include following steps:
1) the melting furnace temperature is arranged on 1120~1130 ℃, the holding furnace temperature is arranged on 1125~1135 ℃;
2) with copper raw material with every 50-70 second 1 ton speed throw in into melting furnace;
3) in step 2) fusing time in, be 0.4%-3% according to the content of carbon monoxide in the carbonyl analyzer adjustment melting furnace, and remove the impurity that swims in the surface through skimming gate, the frequency of skimming be every 2-4 hour once;
4) the liquid copper after the fusing that obtains of step 3) flows in the holding furnace through the chute pushing off the slag, and holding furnace is 15 tonnes, begins in holding furnace, to add timber before the casting and carries out redox reaction, and the addition of said timber is the 0.4-0.6% of liquid weight of copper;
5) the liquid copper after the reduction that obtains of step 4) flows in the casting ladle after through the downtand pushing off the slag, and oxygenating simultaneously, and the casting ladle temperature is controlled to be 1105 ℃~1125 ℃, is provided with the levels pushing off the slag in the casting ladle;
6) the liquid copper after the oxygenating that obtains of step 5) flows in the crystallization race through the following head piece of casting ladle, cools off and strand through cooling water, and strand speed is 45 tons/hour;
7) the casting in bronze base that obtains of step 6) is rolled and obtains oxygen-free copper bar, and rolling temperature is controlled to be, and getting into before the milling train is 850 ℃, get into milling train after temperature be controlled to be 800 ℃.
2. the casting method of oxygen-free copper bar according to claim 1, it is characterized in that: the melting furnace temperature in the said step 1) is arranged on 1125 ℃, and the holding furnace temperature is arranged on 1130 ℃.
3. the casting method of oxygen-free copper bar according to claim 1 is characterized in that: the copper raw material said step 2) is one or more the mixture in electrolysis copper coin, copper scrap bar and the cable waste copper conductor.
4. the casting method of oxygen-free copper bar according to claim 1, it is characterized in that: the copper raw material said step 2) is thrown in into melting furnace with per 60 seconds 1 ton speed.
5. the casting method of oxygen-free copper bar according to claim 1 is characterized in that: in the said step 3) in the adjustment melting furnace content of carbon monoxide be 1.7%, the frequency of skimming be per 3 hours once.
6. the casting method of oxygen-free copper bar according to claim 1, it is characterized in that: the addition of timber is 0.5% of a liquid weight of copper in the said step 4).
7. the casting method of oxygen-free copper bar according to claim 1, it is characterized in that: in the said step 5), the casting ladle temperature is controlled to be 1115 ℃.
CN2011104072931A 2011-12-09 2011-12-09 Casting method of oxygen-free copper rod Pending CN102489510A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103567223A (en) * 2013-10-20 2014-02-12 肇庆市弘达实业有限公司 Continuous casting and rolling production technique for copper rods
CN105821219A (en) * 2016-03-24 2016-08-03 江苏华威铜业有限公司 Oxygen-free copper rod production line and production method
CN106001464A (en) * 2016-06-29 2016-10-12 安徽天大铜业有限公司 Control method for oxygen content during production process for copper rod
CN106334711A (en) * 2016-09-27 2017-01-18 绵阳铜鑫铜业有限公司 Temperature control method for continuous casting and rolling
CN107214194A (en) * 2017-07-31 2017-09-29 尚成荣 A kind of continuous casting and rolling process for production of oxygen-free copper bar
CN107331474A (en) * 2017-06-14 2017-11-07 飞龙精工科技(苏州)有限公司 The preparation technology of copper free wire
CN108114983A (en) * 2017-12-25 2018-06-05 新兴铸管(浙江)铜业有限公司 A kind of method of continuous casting and rolling production medium and high voltage cable copper bar
CN111136107A (en) * 2019-12-20 2020-05-12 杭州富通电线电缆有限公司 Copper rod production process
CN111359858A (en) * 2020-03-20 2020-07-03 四川博鑫铜业有限公司 Copper rod anti-oxidation process
CN111893303A (en) * 2020-06-04 2020-11-06 安徽楚江高新电材有限公司 Preparation method of high-performance renewable resource copper rod

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2109902U (en) * 1990-06-19 1992-07-15 洪伟 Improved equipment for continuous producting non-oxyen copper rod
CN1398688A (en) * 2002-04-12 2003-02-26 北京科技大学 Prepn process of superfine oxygen-free copper wire
JP2004188429A (en) * 2002-12-09 2004-07-08 Hitachi Cable Ltd Method for producing copper rough-drawn wire and copper wire
EP2210687A1 (en) * 2007-10-16 2010-07-28 Mitsubishi Materials Corporation Process for manufacturing copper alloy wire
CN102168180A (en) * 2011-04-11 2011-08-31 中天合金技术有限公司 Upcast method for producing high-purity bright copper rod

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2109902U (en) * 1990-06-19 1992-07-15 洪伟 Improved equipment for continuous producting non-oxyen copper rod
CN1398688A (en) * 2002-04-12 2003-02-26 北京科技大学 Prepn process of superfine oxygen-free copper wire
JP2004188429A (en) * 2002-12-09 2004-07-08 Hitachi Cable Ltd Method for producing copper rough-drawn wire and copper wire
EP2210687A1 (en) * 2007-10-16 2010-07-28 Mitsubishi Materials Corporation Process for manufacturing copper alloy wire
CN102168180A (en) * 2011-04-11 2011-08-31 中天合金技术有限公司 Upcast method for producing high-purity bright copper rod

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103567223A (en) * 2013-10-20 2014-02-12 肇庆市弘达实业有限公司 Continuous casting and rolling production technique for copper rods
CN105821219A (en) * 2016-03-24 2016-08-03 江苏华威铜业有限公司 Oxygen-free copper rod production line and production method
CN106001464A (en) * 2016-06-29 2016-10-12 安徽天大铜业有限公司 Control method for oxygen content during production process for copper rod
CN106334711A (en) * 2016-09-27 2017-01-18 绵阳铜鑫铜业有限公司 Temperature control method for continuous casting and rolling
CN107331474A (en) * 2017-06-14 2017-11-07 飞龙精工科技(苏州)有限公司 The preparation technology of copper free wire
CN107214194A (en) * 2017-07-31 2017-09-29 尚成荣 A kind of continuous casting and rolling process for production of oxygen-free copper bar
CN107214194B (en) * 2017-07-31 2019-04-26 南通明光电线有限公司 A kind of continuous casting and rolling process for production of oxygen-free copper bar
CN108114983A (en) * 2017-12-25 2018-06-05 新兴铸管(浙江)铜业有限公司 A kind of method of continuous casting and rolling production medium and high voltage cable copper bar
CN111136107A (en) * 2019-12-20 2020-05-12 杭州富通电线电缆有限公司 Copper rod production process
CN111136107B (en) * 2019-12-20 2021-11-19 杭州富通电线电缆有限公司 Copper rod production process
CN111359858A (en) * 2020-03-20 2020-07-03 四川博鑫铜业有限公司 Copper rod anti-oxidation process
CN111893303A (en) * 2020-06-04 2020-11-06 安徽楚江高新电材有限公司 Preparation method of high-performance renewable resource copper rod

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