CN109457129A - A kind of mine cable high strength oxygen-free copper bar - Google Patents
A kind of mine cable high strength oxygen-free copper bar Download PDFInfo
- Publication number
- CN109457129A CN109457129A CN201811531380.6A CN201811531380A CN109457129A CN 109457129 A CN109457129 A CN 109457129A CN 201811531380 A CN201811531380 A CN 201811531380A CN 109457129 A CN109457129 A CN 109457129A
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- Prior art keywords
- copper
- oxygen
- liquid
- high strength
- free
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/004—Copper alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/117—Refining the metal by treating with gases
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of mine cable high strength oxygen-free copper bars, the present invention is by strictly screening electrolytic copper material in blending process, the selection of copper material is other than cathode copper, it is also added into a certain amount of red copper waste material, after refining removal of impurities and deoxygenation, the standard of tough cathode oxygen content is basically reached, therefore had not only solved the problems, such as the red copper materials recycling utilization of resources, but also reduce production cost；In fusion process, by refining three times, select different refining reagents, it is progressive, foreign metal zinc, lead, tin, nickel, arsenic etc. in copper material can be removed to greatest extent, by using compound oxygen scavenger, wherein the rare earth element of lanthanum, cerium and praseodymium compounding is used to significantly improve the processing performance of copper, it can sufficiently be reacted with the cuprous oxide in copper liquid, so that cuprous oxide is sufficiently reduced to copper, the compounding oxygen scavenger that six calcium borides and lithia are formed then further decreases the content of oxygen in copper liquid, so that product oxygen content is further reduced.
Description
Technical field
The present invention relates to industrial production technology field, specially a kind of mine cable high strength oxygen-free copper bar.
Background technique
Oxygen-free copper (generally oxygen content is in 20PPM copper product below), since it is with good conductive, thermal conductivity
Can, it is widely used in the production and manufacture of electronics, electrician, electrical part, the vapotron of electron tube is crossed and led
The products such as pipe, magnetron, vacuum switch tube will use oxygenless copper material, since electron tube in the fabrication process will
It is sealed in hydrogen, therefore has very stringent regulation to the control of the oxygen content in copper, with the continuous promotion of industrial technology, state
Border and the domestic requirement to oxygen-free copper bar are constantly promoted, and especially require to be continuously improved to the oxygen content of oxygen-free copper bar, existing
The performance indicator of copper bar of continuous casting and rolling production far can not reach international requirement, the oxygen content of production technology production exists
200PPM or so, conductivity in 0 .0600 hereinafter, and the oxygen content of international high purity copper bar require control within 20PPM,
Conductivity is in 0 .064 or more, and for above situation, the preparation process of domestic oxygen-free copper bar still has one section apart from international standard
Gap, extremely urgent problem seek to solve the problems, such as without phosphorus deoxidation of the cathode copper in fusion-casting process.
Its oxygen content of the copper bar of existing up-drawing method production is generally between 50-100PPM, but the item of its preparation process
Part is harsh, there is that, deoxygenation very high to raw material requirement, oxygen barrier effect are bad, and the technique for the poling that tradition uses consumes
A large amount of pine such as pollutes the environment at a series of defects.
Summary of the invention
The purpose of the present invention is to provide a kind of mine cable high strength oxygen-free copper bars, to solve to mention in above-mentioned background technique
Out the problem of.
To achieve the above object, the invention provides the following technical scheme: a kind of mine cable high strength oxygen-free copper bar, specifically
The preparation method is as follows:
Step 1: carrying out ingredient, strictly screen during ingredient to electrolytic copper material, the selection of copper material in addition to cathode copper with
Outside, it is also added into a certain amount of red copper waste material (by the high-purity light waste material of sorting), raw material are by stringent surface
Reason.
Step 2: putting raw materials into and carry out melting in furnace, in fusion process, compound oxygen scavenger is added, wherein lanthanum, cerium
It is used to significantly improve the processing performance of copper with the rare earth element of praseodymium compounding, is sufficiently reacted with the cuprous oxide in copper liquid, so that oxygen
Change the cuprous compounding oxygen scavenger for being sufficiently reduced to copper, being added that six calcium borides and lithia are formed, further decreases oxygen in copper liquid
Content is removed the foreign metal in copper material.
Step 3: copper liquid continuous up-casting introduces high pure nitrogen and carries out boiling deoxygenation, in copper during continuous up-casting
The oxygen barrier layer by crystalline flake graphite and football alkene is arranged in liquid surface, avoids the secondary oxygen uptake of copper liquid, the oxidation material in copper liquid and graphite
Further reaction, oxygen barrier effect is obvious, is conducive to the generation of Gaochun oxygen-free high conductivity type copper bar.
Step 4: being fixed installation to crystallizer, when needed, crystallizer is detached from copper liquid surface in time, prevents copper
Liquid cooling and solidifying blocking crystallizer.
Preferably, the copper bar section after the completion of preparing is without hollow free from admixture, surface non-oxidation；Diameter is 8 ± 0.4mm；Copper
Content≤99.95%；Conductivity (20) >=100(IACS).
Preferably, in fusion process, by refining three times, selection difference is put into refining reagent, progressive.
Preferably, copper liquid is during thawing and refining, under the covering from beginning to end in charcoal and crystalline flake graphite, wood
Charcoal, which enters stokehold, to be toasted, water content < 8%.
Preferably, temperature of the copper liquid in holding furnace is controlled in (1150 ± 5) DEG C.
Preferably, crystallizer passes in and out water temperature difference and is reduced to 7 DEG C or so by 12 DEG C.
Compared with prior art, the beneficial effects of the present invention are: the present invention by blending process to electrolytic copper material
Stringent screening, the selection of copper material are also added into a certain amount of red copper waste material (by the high-purity light of sorting other than cathode copper
Bright waste material), after refining removal of impurities and deoxygenation, the standard of tough cathode oxygen content is basically reached, therefore it is useless both to have solved red copper
The problem of expecting renewable resource utilization, and reduce production cost；In fusion process, by refining three times, different essences is selected
Reagent is refined, it is progressive, foreign metal zinc, lead, tin, nickel, the arsenic etc. in copper material can be removed to greatest extent, by using
Compound oxygen scavenger, wherein the rare earth element of lanthanum, cerium and praseodymium compounding is used to significantly improve the processing performance of copper, can be with the oxygen in copper liquid
Change cuprous abundant reaction so that cuprous oxide is sufficiently reduced to copper, the compounding oxygen scavenger that six calcium borides and lithia are formed then into
One step reduces the content of oxygen in copper liquid, so that product oxygen content is further reduced；To guarantee that copper liquid is kept away in continuous up-casting
Exempt from oxygen uptake, the present invention is other than introducing high pure nitrogen and carrying out boiling deoxygenation, also by being arranged on copper liquid surface by crystalline flake graphite
With the oxygen barrier layer of football alkene, copper liquid is not only made to avoid secondary oxygen uptake process, also makes oxidation material in graphite and copper liquid into one
Step reaction, oxygen barrier effect is obvious, is conducive to the generation of high-purity oxygen-free high conductivity type copper bar, avoids atmosphere pollution caused by traditional approach
Phenomenon.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment 1
A kind of embodiment provided by the invention: a kind of mine cable high strength oxygen-free copper bar, it is specific the preparation method is as follows:
Step 1: carrying out ingredient, strictly screen during ingredient to electrolytic copper material, the selection of copper material in addition to cathode copper with
Outside, it is also added into a certain amount of red copper waste material (by the high-purity light waste material of sorting), raw material are by stringent surface
Reason.
Step 2: putting raw materials into and carry out melting in furnace, in fusion process, compound oxygen scavenger is added, wherein lanthanum, cerium
It is used to significantly improve the processing performance of copper with the rare earth element of praseodymium compounding, is sufficiently reacted with the cuprous oxide in copper liquid, so that oxygen
Change the cuprous compounding oxygen scavenger for being sufficiently reduced to copper, being added that six calcium borides and lithia are formed, further decreases oxygen in copper liquid
Content is removed the foreign metal in copper material.
Step 3: copper liquid continuous up-casting introduces high pure nitrogen and carries out boiling deoxygenation, in copper during continuous up-casting
The oxygen barrier layer by crystalline flake graphite and football alkene is arranged in liquid surface, avoids the secondary oxygen uptake of copper liquid, the oxidation material in copper liquid and graphite
Further reaction, oxygen barrier effect is obvious, is conducive to the generation of Gaochun oxygen-free high conductivity type copper bar.
Step 4: being fixed installation to crystallizer, when needed, crystallizer is detached from copper liquid surface in time, prevents copper
Liquid cooling and solidifying blocking crystallizer.
In the present embodiment, by using compound oxygen scavenger, wherein the rare earth element of lanthanum, cerium and praseodymium compounding is for significantly changing
The processing performance of kind copper, can sufficiently react with the cuprous oxide in copper liquid, so that cuprous oxide is sufficiently reduced to copper, six calcium borides
The compounding oxygen scavenger formed with lithia then further decreases the content of oxygen in copper liquid, so that product oxygen content is further dropped
It is low, it is progressive, foreign metal zinc, lead, tin, nickel, the arsenic etc. in copper material can be removed to greatest extent.
Embodiment 2
Copper bar section after the completion of preparation is without hollow free from admixture, surface non-oxidation；Diameter is 8 ± 0.4mm；Copper content≤
99.95%；Conductivity (20) >=100(IACS).
In the present embodiment, the copper bar for preparing completion reaches requirements above, reaches expected result, the quality of copper bar can
It is guaranteed.
Embodiment 3
In fusion process, by refining three times, selection difference is put into refining reagent, progressive.
In the present embodiment, raw material are refined three times, be separately added into lanthanum, cerium and praseodymium compounding agent and six calcium borides and
The compounding oxygen scavenger that lithia is formed, it is progressive, the metals such as zinc, lead, tin, nickel, the arsenic in copper removal material can be removed to greatest extent
Impurity.
Embodiment 4
During thawing and refining, under the covering from beginning to end in charcoal and crystalline flake graphite, charcoal enters stokehold to be needed copper liquid
It is toasted, water content < 8%.
In the present embodiment, by the way that copper liquid to be under the covering of charcoal and crystalline flake graphite, one layer is formed on copper liquid surface
Oxygen barrier layer avoids the secondary oxygen uptake of copper liquid, and copper liquid is further reacted with the oxidation material in graphite, and oxygen barrier effect is obvious, is conducive to
The generation of Gaochun oxygen-free high conductivity type copper bar.
Embodiment 5
Temperature of the copper liquid in holding furnace is controlled in (1150 ± 5) DEG C.
In the present embodiment, temperature of the copper liquid in holding furnace is affected to casting idioplasm amount, and temperature is excessively high, can make crystal grain
Roughening, oxygen content rise, and temperature is too low, copper liquid poor fluidity, cold shut and crackle and loose and disconnected embryo etc. easily occur, test table
Bright, copper liquid temperature control is optimal production temperature in (1150 ± 5) DEG C.
Embodiment 6
Crystallizer passes in and out water temperature difference and is reduced to 7 DEG C or so by 12 DEG C.
In the present embodiment, practice have shown that, equipment adjust allow in the case where, usually by crystallizer pass in and out water temperature difference by
12 DEG C are reduced to 7 DEG C or so, can make to cast the coarse column crystal of embryo be improved significantly.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any label in claim should not be construed as limiting the claims involved.
Claims (6)
1. a kind of mine cable high strength oxygen-free copper bar, it is characterised in that: it is specific the preparation method is as follows:
Step 1: carrying out ingredient, strictly screen during ingredient to electrolytic copper material, the selection of copper material in addition to cathode copper with
Outside, it is also added into a certain amount of red copper waste material (by the high-purity light waste material of sorting), raw material are by stringent surface
Reason；
Step 2: putting raw materials into and carry out melting in furnace, in fusion process, compound oxygen scavenger is added, wherein lanthanum, cerium and praseodymium
The rare earth element of compounding is used to significantly improve the processing performance of copper, sufficiently reacts with the cuprous oxide in copper liquid, so that oxidation is sub-
Copper is sufficiently reduced to copper, and the compounding oxygen scavenger that six calcium borides and lithia are formed is added, further decreases the content of oxygen in copper liquid,
Foreign metal in copper material is removed；
Step 3: copper liquid continuous up-casting introduces high pure nitrogen and carries out boiling deoxygenation, in copper liquid table during continuous up-casting
The oxygen barrier layer by crystalline flake graphite and football alkene is arranged in face, avoids the secondary oxygen uptake of copper liquid, and the oxidation material in copper liquid and graphite is into one
Step reaction, oxygen barrier effect is obvious, is conducive to the generation of Gaochun oxygen-free high conductivity type copper bar；
Step 4: being fixed installation to crystallizer, when needed, crystallizer is detached from copper liquid surface in time, prevents copper liquid cold
But solidification blocking crystallizer.
2. a kind of mine cable high strength oxygen-free copper bar according to claim 1, it is characterised in that: the copper after the completion of preparing
Bar section is without hollow free from admixture, surface non-oxidation；Diameter is 8 ± 0.4mm；Copper content≤99.95%；Conductivity (20) >=100
(IACS).
3. a kind of mine cable high strength oxygen-free copper bar according to claim 1, it is characterised in that: in fusion process,
By refining three times, selection difference is put into refining reagent, progressive.
4. a kind of mine cable high strength oxygen-free copper bar according to claim 1, it is characterised in that: copper liquid is in thawing and essence
During refining, under the covering from beginning to end in charcoal and crystalline flake graphite, charcoal, which enters stokehold, to be toasted, water content < 8%.
5. a kind of mine cable high strength oxygen-free copper bar according to claim 1, it is characterised in that: copper liquid is in holding furnace
Temperature control in (1150 ± 5) DEG C.
6. a kind of mine cable high strength oxygen-free copper bar according to claim 1, it is characterised in that: crystallizer passes in and out water temperature
Difference is reduced to 7 DEG C or so by 12 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811531380.6A CN109457129A (en) | 2018-12-14 | 2018-12-14 | A kind of mine cable high strength oxygen-free copper bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811531380.6A CN109457129A (en) | 2018-12-14 | 2018-12-14 | A kind of mine cable high strength oxygen-free copper bar |
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| CN109457129A true CN109457129A (en) | 2019-03-12 |
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| CN201811531380.6A Pending CN109457129A (en) | 2018-12-14 | 2018-12-14 | A kind of mine cable high strength oxygen-free copper bar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110616353A (en) * | 2019-10-28 | 2019-12-27 | 河南科技大学 | High-purity high-conductivity copper and preparation method thereof |
| CN112725634A (en) * | 2019-10-14 | 2021-04-30 | 中铝洛阳铜加工有限公司 | Production process method of low-oxygen large-tonnage oxygen-free copper ingot |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106180616A (en) * | 2016-08-10 | 2016-12-07 | 安徽晋源铜业有限公司 | A kind of high-purity oxygen-free high conductivity type copper bar and processing method thereof |
-
2018
- 2018-12-14 CN CN201811531380.6A patent/CN109457129A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106180616A (en) * | 2016-08-10 | 2016-12-07 | 安徽晋源铜业有限公司 | A kind of high-purity oxygen-free high conductivity type copper bar and processing method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112725634A (en) * | 2019-10-14 | 2021-04-30 | 中铝洛阳铜加工有限公司 | Production process method of low-oxygen large-tonnage oxygen-free copper ingot |
| CN110616353A (en) * | 2019-10-28 | 2019-12-27 | 河南科技大学 | High-purity high-conductivity copper and preparation method thereof |
| CN110616353B (en) * | 2019-10-28 | 2021-09-24 | 河南科技大学 | High-purity high-conductivity copper and preparation method thereof |
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Application publication date: 20190312 |