CN101914689A - Method for producing low-oxygen electro-technical copper wire blank with waste copper - Google Patents
Method for producing low-oxygen electro-technical copper wire blank with waste copper Download PDFInfo
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- CN101914689A CN101914689A CN2010102712712A CN201010271271A CN101914689A CN 101914689 A CN101914689 A CN 101914689A CN 2010102712712 A CN2010102712712 A CN 2010102712712A CN 201010271271 A CN201010271271 A CN 201010271271A CN 101914689 A CN101914689 A CN 101914689A
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Abstract
The invention discloses a method for producing a low-oxygen electro-technical copper wire blank with waste copper. The method comprises the following steps of: sorting and packing the waste copper and melting the waste copper in a furnace; sequentially adding coke, quartz and lime into the furnace and performing refining for three times to obtain high-purity copper oxide; poling the copper oxide with log to obtain pure copper; and performing casting and continuous casting and rolling to obtain a product. Compared with the prior art, the method has the advantages of stable product quality, improved production efficiency, saved production cost and improved qualification rate.
Description
(1) technical field: the present invention relates to the working method of metallic copper, particularly use producing low-oxygen electro-technical copper wire blank with waste copper.
(2) background technology: traditional method is carried out the copper scrap smelting with reverberatory furnace, is to be blown into air copper is carried out oxidation in fusion process; With slotting wood or heavy oil copper water is reduced, its principle is to capture the oxygen of copper water oxygen copper with methane, the hydrogen of inserting cracking generation in wood or the heavy oil reduction process, and its reaction formula is: 2H
2O==2H
2+ O
2Cu
2O+H
2==Cu+H
2O; 4Cu
2O+CH
4==8Cu+2H
2O+CO with this traditional smelting process, because the difference of copper scrap quality is very big, causes the quality instability of product.Particularly the electrician who produces is very unstable with the quality of 8mm copper cash base.
(3) summary of the invention:
1, goal of the invention: the objective of the invention is to deficiency, a kind of method of utilizing producing low-oxygen electro-technical copper wire blank with waste copper is provided at original technical scheme.Solve owing to very big unstable product quality and the high-quality starting material of causing of raw-material quality differential in the traditional reflective stove smelting production process cause the high problem of cost.
2, technical scheme technical scheme of the present invention is: a kind of method of utilizing producing low-oxygen electro-technical copper wire blank with waste copper in turn includes the following steps: copper scrap sorting packing; When the reverberatory furnace furnace temperature reaches 1300 ℃, copper scrap begins to throw stove, after the copper scrap fusing, keeps furnace temperature at 1100～1150 ℃, skims; Continue again to be warmed to after 1200～1250 ℃, add coke and carry out the oxidation refining first time, and temperature guarantor reverberatory furnace stove stove is held in 1200～1250 ℃, slagging-off; Add quartz and carry out the oxidation refining second time, and maintain the temperature at 1200～1250 ℃, slagging-off; Add lime and carry out oxidation refining for the third time, and make temperature remain on 1200～1250 ℃, slagging-off; Oxidation refining finishes, and with purified cupric oxide, carries out poling, obtains fine copper, and makes temperature remain on 1150～1170 ℃; Casting also makes temperature remain on 1150～1120 ℃; Obtain product of the present invention through continuous casting and continuous rolling mill.
Concrete operations are: begin to feed in raw material more than smelting furnace temperature increase to 1300 ℃, remain furnace temperature and be not less than 1100 ℃ in reinforced process.After all the copper material add, fire door put down begin fusing, the visual fusion progress is regulated the air quantity volume of fuel at any time than for (6: 4), 1230 ℃ of (air quantity is directly proportional with fuel ratio) furnace temperature when adjusting furnace temperature, guarantees that furnace charge melts fast.When composition brass in the stove melts 2/3rds, also (diameter is Φ 25mm with little airduct can to add an amount of low sulfur coke (weight of copper is 1000: 2 with the weight of coke ratio) in stove, blast is 0.3～0.5MPa) to disclose and stir the molten bath, time is 45 minutes, to quicken fusing, when treating that the copper material all melts, slag is taken off.
Insert the airduct (iron) that a root iron pipe one end becomes crooked 60-80 ° and outsourcing refractory mortar and dries from service gate during oxidation refining, airduct should insert copper water depth 2/3 during oxidation; And air blast in copper water, pressure of blast is 0.3～0.5MPa.Control for Kiln Temperature is at 1200～1250 ℃ between oxidation period, and 1150～1170 ℃ of copper water temps, flue negative pressure are 91Pa.
Below be that oxidation refining dezincifies, iron, lead, the chemical equation of impurity such as tin is:
ZnO+SiO2＝＝ZnSiO3 FeO+SiO2＝＝FeSiO3
Fe2O3+3SiO2＝＝Fe2(SiO3) PbO+SiO2＝＝PbSiO3
SnO+SiO2＝＝SnSiO3
Poling method (weight of copper and wooden weight ratio 20: 1) is taked in reduction.
Cu2O+H2＝＝Cu+H2O，
4Cu2O+CH4＝＝8Cu+2H2O+CO
Copper water from the reverberatory furnace copper outlet through chute to casting ladle, become 24 ° of angles to advance crystallizing wheel, preventing has pore and shrinkage cavity in the casting cycle.Access bridge on the copper base behind the cooling forming by being shaped into continuous casting and continuous rolling mill, finally obtains the electrician with hypoxemia Φ 8mm copper cash base, the end product quality GB/T3953-2009 that is up to state standards
3, beneficial effect: the present invention smelts with the traditional reflective stove and compares, the steady quality of product, and main two indexs of product: copper tensile strength 〉=37, volume specific resistance p20≤0.01724 Ω .mm2/m will be higher than traditional reverberatory furnace and smelt.With the melting of traditional reflective stove to the very high contrast of copper quality requirements, the present invention has saved production cost, has improved product percent of pass.
(4) embodiment:
The specific embodiment of the present invention is: copper scrap sorting packing; Begin to feed in raw material when the reverberatory furnace furnace temperature rises to more than 1300 ℃, in reinforced process, remain furnace temperature and be not less than 1100 ℃.After all the copper material add, fire door put down begin fusing, the visual fusion progress is regulated the air quantity volume of fuel at any time than being (6: 4), melts and makes furnace temperature remain on 1100～1150 ℃ and skim; Add coke and carry out the oxidation refining first time, and make furnace temperature remain on 1200～1250 ℃, slagging-off; Add quartz and carry out the oxidation refining second time, and make temperature remain on 1200～1250 ℃, slagging-off; Add lime and carry out oxidation refining for the third time, and make temperature remain on 1200～1250 ℃, slagging-off; Oxidation refining finishes, and purified cupric oxide is carried out the log poling obtain fine copper, and make temperature remain on 1150～1170 ℃; Casting also makes temperature remain on 1150～1120 ℃; Advance continuous casting and continuous rolling mill, obtain product of the present invention.
Concrete operations: copper scrap sorting packing is standby; More than smelting furnace temperature increase to 1300 ℃, begin to feed in raw material, in reinforced process, remain furnace temperature and be not less than 1100 ℃.After all the copper material add, fire door put down begin fusing, at this moment want the visual fusion progress to regulate air quantity volume of fuel 1230 ℃ of (air quantity is directly proportional with fuel ratio) furnace temperature than for (6: 4), adjustment furnace temperature the time at any time, guarantee that furnace charge melts fast.When composition brass in the stove melts 2/3rds, also (diameter is Φ 25mm with little airduct can to add an amount of low sulfur coke (weight of copper is 1000: 2 with the weight of coke ratio) in stove, blast is 0.3～0.5MPa) to disclose and stir the molten bath, time is 45 minutes, to quicken fusing, when treating that the copper material all melts, slag is taken off.
Insert the crooked 60-80o (the outsourcing refractory mortar is dried) of 1 root Φ 25mm iron pipe, one end from service gate during oxidation refining, airduct should insert copper water depth 2/3 during oxidation, air blast in copper water, and pressure of blast is 0.3～0.5MPa.Control for Kiln Temperature is at 1200～1250 ℃ between oxidation period, and 1150～1170 ℃ of copper water temps, flue negative pressure are 91Pa.Whole oxidation divides several stages to carry out, and the fs is steamed the zinc phase for adding the coke air blast, and this stage mainly is dezincify, also has 40%～50% lead and 70%～80% tin to remove simultaneously, and zinc then 90% is removed; Subordinate phase is that air blast adds quartz (river sand) except that slicker solder. the phase III is that air blast adds basic flux (lime) dearsenification antimony nickel etc.Oxidation period copper liquid total surface be stamped one deck low sulfur coke.
The zinc phase is steamed for adding coke (weight of copper is 1000: 2 with the weight of coke ratio) air blast by first part, mainly is dezincify, also has 40%～50% lead and 70%～80% tin to remove simultaneously, and zinc then 90% is removed;
Second section is that air blast adds quartz (river sand) (weight of copper and quartzy weight ratio are 1000: 1.5) except that slicker solder.
Third part is that air blast adds basic flux (lime) (weight ratio of weight of copper and lime is 1000: 1) dearsenification antimony nickel etc.
More than three parts be copper oxidation refining and slagging-off removal of impurities process.Purpose is to improve the purity of cupric oxide.Reduction takes log poling method to obtain fine copper (weight of copper and wooden weight ratio 20: 1).
Cu2O+H2＝＝Cu+H2O，
4Cu2O+CH4＝＝8Cu+2H2O+CO
Copper water from the reverberatory furnace copper outlet through chute to casting ladle, become 24 ° of angles to advance crystallizing wheel, prevent to be cast with the pore shrinkage cavity, access bridge on the copper base behind the cooling forming, by being shaped into continuous casting and continuous rolling mill, finally obtain the electrician with hypoxemia Φ 8mm copper cash base, the end product quality GB/T3953-2009 that is up to state standards.
Claims (3)
1. a method of utilizing producing low-oxygen electro-technical copper wire blank with waste copper in turn includes the following steps: copper scrap sorting packing; When the reverberatory furnace furnace temperature reaches 1300 ℃, copper scrap begins to throw stove, after the copper scrap fusing, keeps furnace temperature at 1100～1150 ℃, skims; Continue to be warmed to after 1200～1250 ℃ slagging-off again; Add quartz and carry out the oxidation refining second time, and make temperature remain on 1200～1250 ℃, slagging-off; Add lime and carry out oxidation refining for the third time, and make temperature remain on 1200～1250 ℃, slagging-off; Oxidation refining finishes, and with purified cupric oxide, carries out the log poling, obtains fine copper, and makes temperature remain on 1150～1170 ℃; Casting also makes temperature remain on 1150～1120 ℃; Continuous casting and rolling obtains product of the present invention.
2. the method for utilizing producing low-oxygen electro-technical copper wire blank with waste copper according to claim 1, it is characterized in that, its concrete operations step is: begin to feed in raw material more than smelting furnace temperature increase to 1300 ℃, remain furnace temperature and be not less than 1100 ℃ in reinforced process; After all the copper material add, fire door put down begin fusing, it is 6: 4 that the visual fusion progress is regulated air quantity volume of fuel ratio at any time, adjust furnace temperature to 1230 ℃, guarantees that furnace charge melts fast; Add the low-sulfur hard coke of weight of copper 2/1000ths in stove and be Φ 25mm with diameter when composition brass fusing in the stove 2/3rds, blast is that the little airduct of 0.3～0.5MPa is disclosed and stirred the molten bath, and the time is 45 minutes, melts quickening; When treating that the copper material all melts, slag is taken off; Insert the airduct that one one end becomes crooked 60-80 ° and outsourcing refractory mortar and dries from service gate during oxidation refining; Airduct should insert copper water depth 2/3 during oxidation; And air blast in copper water, pressure of blast is 0.3～0.5MPa; Control for Kiln Temperature is at 1200～1250 ℃ between oxidation period, and 1150～1170 ℃ of copper water temps, flue negative pressure are 91Pa; Copper water from the reverberatory furnace copper outlet through chute to casting ladle, become 24 ° of angles to advance crystallizing wheel, prevent to be cast with the pore shrinkage cavity, access bridge on the copper base behind the cooling forming gets product of the present invention by shaping and continuous casting and rolling.
3. the method for utilizing producing low-oxygen electro-technical copper wire blank with waste copper according to claim 1 and 2 is characterized in that, the add-on of low sulfur coke is 2/1000 of a weight of copper; The add-on of quartz sand is 1.5/1000 of a weight of copper; The add-on of calcium oxide is 1/1000 of a weight of copper.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162037A (en) * | 2011-04-11 | 2011-08-24 | 宁波金田冶炼有限公司 | Method for depleting refining slag of copper |
| CN102433438A (en) * | 2011-12-16 | 2012-05-02 | 金川集团有限公司 | Treatment method of scrap copper |
| CN102806244A (en) * | 2011-06-02 | 2012-12-05 | 高玉树 | Process for producing copper tubes by refining,continuous casting, continuous rolling and stretching of waste copper |
| CN103114208A (en) * | 2013-03-12 | 2013-05-22 | 绵阳铜鑫铜业有限公司 | Method for producing oxygen-free copper rod from secondary copper |
| CN103725897A (en) * | 2013-12-27 | 2014-04-16 | 中南大学 | Method for directly producing high-purity oxygen-free copper by pyrogenic process continuous refining of scrap copper |
| CN103924093A (en) * | 2014-05-07 | 2014-07-16 | 福建三美金属有限公司 | Production process of copper rods and copper wires |
| CN104599789A (en) * | 2015-02-02 | 2015-05-06 | 鹰潭瑞鑫铜业有限公司 | Process for producing round copper wire for electrical purpose through scrap copper |
| CN108220620A (en) * | 2017-12-31 | 2018-06-29 | 安徽晋源铜业有限公司 | A kind of copper scap refinery practice |
| CN110983067A (en) * | 2019-12-31 | 2020-04-10 | 绵阳铜鑫铜业有限公司 | Secondary copper refining process |
| CN111235405A (en) * | 2020-03-20 | 2020-06-05 | 四川博鑫铜业有限公司 | Low-oxygen copper rod preparation process |
| CN113088701A (en) * | 2021-04-01 | 2021-07-09 | 江西中晟金属有限公司 | Production method for improving strength of copper rod |
Citations (1)
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| CN101275186A (en) * | 2008-04-16 | 2008-10-01 | 倪如宝 | Production method of high-purity copper and low-oxygen bright copper rod |
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| CN101275186A (en) * | 2008-04-16 | 2008-10-01 | 倪如宝 | Production method of high-purity copper and low-oxygen bright copper rod |
Non-Patent Citations (1)
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| 《江西煤炭科技》 20081231 毛华 浅析利用紫杂铜连铸连轧生产低氧光亮铜杆 第44-45页 1-3 , 第3期 2 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162037A (en) * | 2011-04-11 | 2011-08-24 | 宁波金田冶炼有限公司 | Method for depleting refining slag of copper |
| CN102806244A (en) * | 2011-06-02 | 2012-12-05 | 高玉树 | Process for producing copper tubes by refining,continuous casting, continuous rolling and stretching of waste copper |
| CN102433438A (en) * | 2011-12-16 | 2012-05-02 | 金川集团有限公司 | Treatment method of scrap copper |
| CN102433438B (en) * | 2011-12-16 | 2013-06-12 | 金川集团有限公司 | Treatment method of scrap copper |
| CN103114208B (en) * | 2013-03-12 | 2014-11-05 | 绵阳铜鑫铜业有限公司 | Method for producing oxygen-free copper rod from secondary copper |
| CN103114208A (en) * | 2013-03-12 | 2013-05-22 | 绵阳铜鑫铜业有限公司 | Method for producing oxygen-free copper rod from secondary copper |
| CN103725897B (en) * | 2013-12-27 | 2016-03-30 | 中南大学 | A kind of method of copper scap pyrogenic process continuous refining direct production high-purity oxygen-free copper |
| CN103725897A (en) * | 2013-12-27 | 2014-04-16 | 中南大学 | Method for directly producing high-purity oxygen-free copper by pyrogenic process continuous refining of scrap copper |
| CN103924093A (en) * | 2014-05-07 | 2014-07-16 | 福建三美金属有限公司 | Production process of copper rods and copper wires |
| CN104599789A (en) * | 2015-02-02 | 2015-05-06 | 鹰潭瑞鑫铜业有限公司 | Process for producing round copper wire for electrical purpose through scrap copper |
| CN108220620A (en) * | 2017-12-31 | 2018-06-29 | 安徽晋源铜业有限公司 | A kind of copper scap refinery practice |
| CN110983067A (en) * | 2019-12-31 | 2020-04-10 | 绵阳铜鑫铜业有限公司 | Secondary copper refining process |
| CN111235405A (en) * | 2020-03-20 | 2020-06-05 | 四川博鑫铜业有限公司 | Low-oxygen copper rod preparation process |
| CN113088701A (en) * | 2021-04-01 | 2021-07-09 | 江西中晟金属有限公司 | Production method for improving strength of copper rod |
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Open date: 20101215 |