CN106498180B - A kind of process units and method of high-purity oxygen-free copper ingot blank - Google Patents

A kind of process units and method of high-purity oxygen-free copper ingot blank Download PDF

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CN106498180B
CN106498180B CN201611145890.0A CN201611145890A CN106498180B CN 106498180 B CN106498180 B CN 106498180B CN 201611145890 A CN201611145890 A CN 201611145890A CN 106498180 B CN106498180 B CN 106498180B
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compartment
ingot blank
free copper
oxygen
inlet opening
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CN106498180A (en
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黄四龙
李明茂
旷军平
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Jiangxi Guangxin New Materials Ltd By Share Ltd
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Jiangxi Guangxin New Materials Ltd By Share Ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00Obtaining copper
    • C22B15/0026Pyrometallurgy
    • C22B15/006Pyrometallurgy working up of molten copper, e.g. refining
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention provides a kind of process units of high-purity oxygen-free copper ingot blank, melting furnace, compartment and holding furnace including being sequentially communicated setting, the compartment is additionally provided with degasifier, the degasifier includes the air shooter for conveying depleted gas and the hood being connected inside the compartment with the port of export of the air shooter, and it is 0.5 1mm steam vents to be provided with some apertures on the hood;The melting furnace is connected with the compartment by inlet opening, and inlet opening described in the hood face is set, and the hood is 10 40mm apart from the distance of the inlet opening;On copper liquid flow direction, the projection of the hood is more than the projection of the inlet opening.Further present invention also offers the method using said apparatus production oxygen-free copper ingot blank, good, the hypoxic high-purity oxygen-free copper ingot blank that can produce compactness using the present processes.

Description

A kind of process units and method of high-purity oxygen-free copper ingot blank
Technical field
The present invention relates to technical field of nonferrous metal processing, and in particular to a kind of process units of high-purity oxygen-free copper ingot blank.
Background technology
Oxygen-free copper refers to the not oxygen-containing also fine copper without any deoxidier residue, but actually still contain in oxygen-free copper Very micro oxygen and some impurity.By standard GB/T/T5231-2001《Worked copper and copper alloy chemical composition and product shape Shape》Regulation, the content of Oxygen in Oxygen-Free Copper is not more than 0.003%, and content of impurities is not more than 0.05%, and the purity of copper is more than 99.95%.Wherein, according to the height of oxygen content, oxygen-free copper be divided into again TU0 (≤5ppm), TU1 (5~20ppm), TU2 (20~ The rank such as 30ppm).Splendid electrical and thermal conductivity and extension are made it have because Oxygen in Oxygen-Free Copper and impurity content are low, purity is high Property, and air penetrability is low, processing characteristics and welding, anti-corrosion, cold resistance is also preferable.Especially TU0 oxygen-free coppers due to oxygen content it is not high It is the critical material for producing electrovacuum element in 5ppm, also known as high-purity oxygen-free copper.
The raw material of production oxygen-free copper is generally standard cathode copper, and the oxygen content of standard cathode copper is generally 30~50ppm, Far above the oxygen content standard of high-purity oxygen-free copper, and the oxygen in melting production process in easy absorption air.Therefore exist How efficient deoxidation turns into the key technology for preparing high-quality oxygen-free copper in the production process of oxygen-free copper.
Chinese patent literature CN101708510A discloses a kind of processing technology of high-purity high-conductivity oxygen-free copper bar, by metering In argon gas or nitrogen press-in copper liquid and micro-bubble is dispersed as, it is uniformly dispersed in copper liquid, so as to reach degasification, deoxidation Purpose, the technique dissolves in the elemental oxygen dissolved in copper liquid in foreign gas merely by partial pressure difference principle, and outstanding Taken away during floating.But in copper liquid in addition to containing free oxygen, more important is oxygen of the copper under melting state with oxygen reaction generation Change the oxide under trace impurity high temperature with oxygen reaction generation in copper and cuprous oxide, and copper liquid, using point in above-mentioned document Pressure difference mode can not slough the oxygen contained in cupric oxide in copper, cuprous oxide and oxide impurity, thus in copper oxygen content Still it is higher.
Therefore, Chinese patent literature CN101274363A discloses a kind of method for continuously converting and casting oxygen-free copper ingot, its work Skill step includes, and tough cathode first melts in smelting furnace, and the copper liquid after fusing enters deoxidation stove by bottom blowing chute, by an oxidation The mixed gas of carbon gas or carbon monoxide and nitrogen, entered by bottom blowing its bottom in the copper liquid in bottom blowing chute, and with Entrance deoxidation stove in realize the first stage deoxidation degassing, by carbon monoxide or one when by the guiding gutter of bottom blowing furnace head The mixed gas of carbonoxide and nitrogen enters in the copper liquid in guiding gutter, and the deoxidation of second stage is carried out to the copper liquid in guiding gutter Degassing.Be blown into CO gas or carbon monoxide and the mixed gas mode of nitrogen in the patent document are mainly to pass through bottom The air brick of wind drift groove and water conservancy diversion trench bottom is in contact in disperse shape with copper liquid, and the gas being blown into is entered by copper liquid bottom, a side Face, its gas are difficult to equably in floating-upward process in the melt by the way that most of copper liquids are had to pass through copper not in contact with to gas Slowly deoxidation or degasification are completed in diffusion between liquid, and efficiency is low, effect is poor, and deoxidation effect is difficult to stabilization.On the other hand, the program is adopted Smelting furnace is connected with foundry furnace with external chute, external chute causes very big thermal loss, and energy consumption improves, and respectively Gas is connected with smelting furnace and chute two, it is big to also result in air consumption, wastes obvious.Most of all, copper liquid bottom passes through Air brick realizes arrangement of blowing, and air brick easily blocks or avalanche, can not be in production process when partial-air admission hole plug or destruction In judged;When whole air admission holes destroy, then it can not change, get only blowing out, and stove of dismantling, it is very huge to take work consuming Greatly.Continuously prepared so the method can not carry out process monitoring, control of product quality and scale in production.
The content of the invention
Therefore, the technical problem to be solved in the present invention is in the production process in existing oxygen-free copper ingot blank, depleted gas with Copper liquid contact not exclusively the defects of causing deoxidation effect undesirable, and then a kind of device for deoxidizing is provided, with improve depleted gas with Copper liquid contacts effect, so as to improve the removal amount of oxygen in copper liquid to greatest extent.
Therefore, the technical solution adopted by the present invention is:
A kind of process units of high-purity oxygen-free copper ingot blank, including it is sequentially communicated melting furnace, compartment and the holding furnace of setting, institute State compartment and be additionally provided with degasifier, the degasifier includes the air shooter of conveying depleted gas and inside the compartment The hood being connected with the port of export of the air shooter, some aperture 0.5-1mm row is provided with the hood Stomata;
The melting furnace is connected with the compartment by inlet opening, and distance of the inlet opening apart from the compartment bottom is 0- 10mm;
Inlet opening described in the hood face is set, and the hood is 10-40mm apart from the distance of the inlet opening;
On copper liquid flow direction, the projection of the hood is more than the projection of the inlet opening.
Preferably, in the process units of described high-purity oxygen-free copper ingot blank, the compartment and the holding furnace are by going out liquid Hole is connected, and the fluid hole is located in the same horizontal plane with the inlet opening, and the company of the fluid hole and the inlet opening The angle of line and the feed liquor centerline hole is 15-40 °.
Preferably, in the process units of described high-purity oxygen-free copper ingot blank, the hood is hollow tubular structure, one End is connected with the air shooter, and other end sealed set, the steam vent is evenly distributed on hollow tubular hood On perisporium.
Preferably, in the process units of described high-purity oxygen-free copper ingot blank, the entrance point of the air shooter with it is described Depleted gas delivery source outside process units is connected, and the air shooter is additionally provided with the gas of control gas flow Valve.
Preferably, in the process units of described high-purity oxygen-free copper ingot blank, the air shooter is additionally provided with gas and done Dry device.
Preferably, in the process units of described high-purity oxygen-free copper ingot blank, the width of the inlet opening is 50-80mm, its Highly it is 80mm;
The external diameter of the hollow tubular hood is 70-100mm, and its height is 100mm;
The aperture of the steam vent is 1mm.
Preferably, in the process units of described high-purity oxygen-free copper ingot blank, above the melting furnace covered with thickness 150~ The calcining charcoal layer of 250mm drying, graphite flakes layer of compartment and the holding furnace top covered with 100~200mm of thickness; The holding furnace is additionally provided with crystallizer and the casting machine for producing copper ingot base.
Using the method for any of the above-described process units production high-purity oxygen-free copper ingot blank, including,
Depleted gas is passed through in the degasifier, the effusion speed of the depleted gas is 0.03-0.07L/min;
The depleted gas is carbon monoxide or the mixed gas of carbon monoxide and nitrogen, is an oxygen in the depleted gas Change the mixed gas of carbon and nitrogen, the volume ratio of the carbon monoxide and nitrogen is (0.2-0.5):1.
Preferably, the method for producing high-purity oxygen-free copper ingot blank, including,
The ratio between effusion speed of the flow velocity of copper liquid and the depleted gas is 30 in the compartment:1~100:1.
Preferably, the method for producing high-purity oxygen-free copper ingot blank, including,
(1) by after negative electrode copper raw material constantly fusing, copper liquid penetrates melting furnace, compartment and the holding furnace, treats the insulation Copper liquid in stove highly meets during casting demand (i.e. copper liquid immersion crystalline device, and be higher by 100mm-150mm), to set the insulation The temperature of stove is 1130-1165 DEG C;
(2) depleted gas is passed through into the compartment, to remove the oxygen in copper liquid;
(3) start casting machine production oxygen-free copper ingot blank, and detect the oxygen content in oxygen-free copper ingot blank, treat that its oxygen content is less than After 5ppm, keep traction, produces high-purity oxygen-free copper ingot blank
Technical solution of the present invention, have the following advantages that:
1. a kind of process units of high-purity oxygen-free copper ingot blank provided by the invention, including be sequentially communicated setting melting furnace, Compartment and holding furnace, the compartment are additionally provided with degasifier, the degasifier include conveying depleted gas air shooter and The hood being connected with the port of export of the air shooter inside the compartment, it is provided with the hood some Steam vent;The melting furnace is connected with the compartment by inlet opening, and the hood is vertically arranged, and feed liquor described in face Hole is set, and the hood is 10~40mm apart from the distance of the inlet opening;On copper liquid flow direction, the hood Projection of the projection more than the inlet opening.By setting position and the relative position of hood and inlet opening of inlet opening, from And ensure that depleted gas is filled with the position of copper liquid, on the one hand promote depleted gas to be connect with the first of copper liquid entered by inlet opening Touch, improve the local flow state of liquid, depleted gas and the contact area of liquid are improved, on the other hand in the flowing shape of copper liquid Under state, improve distribution of the depleted gas in copper liquid and scattered, and then remove the oxygen in copper liquid to greatest extent.The position can be protected Demonstrate,prove all copper liquids passed through and touch depleted gas, without any dead angle, realize abundant deoxidation.So the high-purity of production can be made The oxygen content of oxygen-free copper ingot blank is stably less than 3ppm, while using the limitation of above-mentioned ad-hoc location, promotes gas from copper Discharge in liquid, ingot casting stomata is greatly reduced, be advantageous to the lifting of strand consistency.
2. a kind of process units of high-purity oxygen-free copper ingot blank provided by the invention, the compartment and the holding furnace are by going out Fluid apertures is connected, and the fluid hole is located in the same horizontal plane with the inlet opening, and the fluid hole and the inlet opening The angle of line and the feed liquor centerline hole is 15-40 °.When fluid hole being set, on the one hand flows copper liquid in above-mentioned position Avoid directly penetrating, form flow dead, add copper liquid with depleted gas and time of contact to improve deoxidation effect, it is more important , process that the floating of gas such as diffusion and carbon dioxide, nitrogen due to depleted gas etc. is escaped from copper liquid, easily Cause the change of local copper liquid micro flow state, set fluid hole that holding furnace liquid level can be made to remain steady in above-mentioned position, enter And stable castability.
3. the process units provided by the invention using the application high-purity oxygen-free copper ingot blank produces high-purity oxygen-free copper ingot blank In method, depleted gas is passed through in the degasifier, is discharged from the hood, the effusion speed of the depleted gas is 0.03 ~0.07L/min;The ratio between effusion speed of the flow of copper liquid and the depleted gas is 30 in the compartment (2):1~100:1. By the control of depleted gas flow velocity and copper liquid flow, contact of the depleted gas with copper liquid and the diffusion in copper liquid are promoted, Deoxidation effect is added, the oxygen content of the high-purity oxygen-free copper ingot blank of production is less than 1ppm.
4. a kind of process units of high-purity oxygen-free copper ingot blank provided by the invention, inlet opening described in described hood face Set, to be inserted from above in copper liquid, be fixed on above table, therefore position is adjustable, fetches and delivers conveniently, securely and reliably.This design Not only make and install simple, and hood can easily be checked, safeguarded and changed, and then realize deoxidation process can Monitoring, it can adjust, can handle, realizing the completely continuous manufacturing of anaerobic copper ingot.
5. the method for production high-purity oxygen-free copper ingot blank provided by the invention, uses CO gas as depleted gas, and one Carbonoxide has deoxidation speed fast and the advantages of deoxidation products does not remain.Nitrogen is mixed in carbon monoxide simultaneously, realizes dehydrogenation Effect.In copper liquid following chemical reaction will occur for carbon monoxide,
CO+2CuO→Cu2O+CO2
CO+Cu2O→2Cu+CO2
CO+MO→M+CO2
H2O→H+O;
CO+O→CO2
Final oxygen floats off out copper liquid melt in form with carbon dioxide bubble, carbon dioxide and copper liquid without solubility behavior, So realize deoxidation.Pass through the design of degasifier, inlet opening, it can be ensured that fully sprayed when entering compartment from melting furnace with degasifier The gas contact gone out, floating upward quickly after gas sprays from bottom, deoxidation is further completed in floating-upward process, reaches abundant deoxidation Purpose.
In addition, gas in floating-upward process, due to being filled with gas not hydrogen, hydrogen partial pressure zero, and is dissolved in bubble The hydrogen partial pressure of neighbouring melt is much larger than zero, based on the difference of hydrogen partial pressure inside and outside bubble, make to be dissolved in hydrogen in melt constantly to Bubble spreads, and is rejected to rising and the emersion of bubble in air, reaches the purpose of degasification (hydrogen).The present invention is in depth While deoxidation, degassing purpose is adequately achieved again.The result of degasification is beneficial to the lifting of strand consistency.Compartment into and out of The design of fluid apertures, the liquid level agitation that the fluctuation of melting furnace fluid pressure and deoxidation degasification are brought can be effectively buffered, makes holding furnace liquid level Remain steady, stable castability.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of the process units of high-purity oxygen-free copper ingot blank of the present invention;
Fig. 2 is the top view of the continuous apparatus of the high-purity oxygen-free copper ingot blank shown in Fig. 1;
Fig. 3 is the structural representation of the process units of another high-purity oxygen-free copper ingot blank of the present invention.
Description of reference numerals:
1- melting furnaces;2- compartments;21- inlet openings;22- fluid holes;3- degasifiers;31- air shooters;32- air valves; 33- hoods;4- gas-drying apparatus;5- holding furnaces;6- casting machines;7- crystallizers;8- calcines charcoal layer;9- graphite phosphorus sheet layers; 10- sawing machines, 11- cooling water tanks;12- copper ingot bases.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected;Can To be mechanical connection or electrical connection;Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this Concrete meaning in invention.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other It is be combined with each other into conflict can.
It is a kind of structural representation of the process units of high-purity oxygen-free copper ingot blank of the present invention as illustrated in fig. 1 and 2, it includes It is sequentially communicated melting furnace 1, compartment 2 and the holding furnace 5 of setting, in the present embodiment, the melting furnace 1 is 2 750 kgs/hour Have a core line-frequency induction smelting electrical furnace, inductor is respectively positioned on immediately below body of heater, for the fusing to copper raw material;The holding furnace 5 There is a core line-frequency induction smelting electrical furnace for 500 kgs/hour, for the continuously casting of oxygen-free copper ingot blank, inductor is respectively positioned on stove Immediately below body;The compartment 2 is placed among melting furnace 1 and holding furnace 5, and is provided with through hole in both sides, makes copper liquid in melting furnace 1st, compartment 2 with keep connecting in holding furnace 5.Through hole close to fusing furnace side is inlet opening 21, and the through hole for being incubated furnace side is liquid Hole 22, compartment is without heat source.
The compartment 2 is additionally provided with degasifier 3, and the degasifier 3 includes the He of air shooter 31 of conveying depleted gas The hood 33 being connected positioned at the inside of the compartment 2 with the port of export of the air shooter 31, set on the hood 33 It is equipped with some steam vents;The melting furnace 1 is connected with the compartment 2 by inlet opening 21, and inlet opening 21 is apart from the compartment 2 The distance of bottom is 0-10mm;Inlet opening 21 described in the face of hood 33 is set, and the hood 33 is apart from the feed liquor The distance in hole 21 is 10-40mm;On copper liquid flow direction, the projection of the hood 33 is more than the throwing of the inlet opening (21) Shadow, so that the gas of hood discharge can fully contact with flowing into the liquid of compartment from inlet opening.In above-mentioned embodiment In, the inlet opening 21 and fluid hole 22 can be provided with one or more, and the corresponding installation one of each inlet opening 21 is described de- Oxygen device.
On the basis of above-mentioned embodiment, the compartment 2 is connected with the holding furnace 5 by fluid hole 22, described Fluid hole 22 is located in the same horizontal plane with the inlet opening 21, and line and institute of the fluid hole 22 with the inlet opening 21 The angle for stating the center line of inlet opening 21 is 15-40 °.
On the basis of above-mentioned embodiment, the hood 33 is hollow tubular structure, and its one end and the gas are defeated Pipe 31 is sent to be connected, other end sealed set, the steam vent is evenly distributed on the perisporium of hollow tubular hood.In this reality It is graphite material to apply hood 33 described in example.
On the basis of above-mentioned embodiment, the entrance point of the air shooter 31 and taking off outside the process units Carrier of oxygen delivery source is connected, and the air shooter 31 is additionally provided with the air valve 32 of control gas flow.
On the basis of above-mentioned embodiment, the air shooter 31 is additionally provided with gas-drying apparatus (4).
On the basis of above-mentioned embodiment, the width of the inlet opening 21 is 50-80mm, and its height is 80mm;It is described The external diameter of hollow tubular hood is 70-100mm, and its height is 100mm;The aperture of the steam vent is 1mm.As specific Embodiment, the width of the inlet opening 21 are 50mm, its height be 80mm accordingly, the external diameter of the hollow tubular hood For 70mm, its height is 100mm, and as alternative embodiment, the width of the inlet opening 21 is 80mm, and its height is Accordingly, the external diameter of the hollow tubular hood is 100mm to 80mm, and its height is 100mm.
On the basis of above-mentioned embodiment, the top of melting furnace 1 is covered with calcining charcoal layer thick 150~250mm 8, graphite flakes layer 9 of the top of compartment 2 and holding furnace 5 covered with 100~200mm;
On the basis of above-mentioned embodiment, when using horizontal continuous-casting, the holding furnace 5 is additionally provided with crystallizer 7 and for producing the casting machine 6 of copper ingot base and equipped with for cutting the sawing machine 10 of oxygen-free copper ingot blank 12 and for oxygen-free copper The cooling water tank 11 that ingot blank 12 is cooled down.
As interchangeable embodiment, produced according to needs of production by the way of up casting, can be such as 3 It is shown, crystallizer 7 and the casting machine 6 for producing copper ingot base are set on the diverse location of the holding furnace 5.
Use said apparatus production high-purity oxygen-free copper ingot blank method for,
(1) operation prepares, and a kind of process units of above-mentioned high-purity oxygen-free copper ingot blank is installed and is ready to, by casting crystalline Device is installed and is assemblied on holding furnace 5, and casting machine 6 is ready to.Calcining charcoal and graphite flakes are dried and be ready to.
(2) copper is melted:By tough cathode melting sources, copper liquid insertion melting furnace 1, compartment 2 and holding furnace 5.Above melting furnace 1 The thick calcining charcoal layers 8 of ready 150~250mm are covered, ready 100- is covered above compartment 2 and holding furnace 5 The graphite flakes layer 9 of 120mm thickness.The temperature of holding furnace 5 is set as 1130~1165 DEG C.
(3) degasifier 3 is installed:The proportional concentration of carbon monoxide and nitrogen is regulated, by the gas valve 32 on degasifier 3 Open, gas will spray from some steam vents 33 below degasifier.Degasifier 3 is inserted and fixed in compartment 2
(4) gas size is adjusted:The gas valve 32 of the top of degasifier 3 is adjusted, and controls the effusion speed of depleted gas For 0.03-0.07L/min, it is preferable that control the ratio between effusion speed of the flow velocity of copper liquid and the depleted gas in the compartment 2 For (30-100):1, the graphite flakes coating 9 that above-mentioned setting will not be broken through on compartment 2.
(5) continuous casting:Start casting machine 6 (Continuous Up casting machine or horizontal continuous-casting machine), a few hours to be drawn Afterwards, ingot blank oxygen content is checked, as oxygen content as little as below the 5ppm of ingot blank, starts normal production.Then constantly traction, is realized The continuous preparation of high-purity oxygen-free copper ingot blank.
When producing high-purity oxygen-free copper ingot blank using the device of the application, the parameter such as set location and air velocity of degasifier It is as shown in table 1 below with the qualitative data of high-purity oxygen-free copper ingot blank.
The high-purity oxygen-free copper ingot blank qualitative data of table 1
As a comparison, the degasifier in the application is directly replaced with into hollow plumbago pipe, outside the connection of graphite-pipe one end Depleted gas source, the other end are inserted in copper liquid to input gas into copper liquid, its carbon monoxide and nitrogen volume ratio 0.3:1, it is empty Heart graphite-pipe is arranged at the middle of compartment, distance 200mm of its output gas end away from the compartment bottom, the depleted gas Effusion speed 0.06L/min, copper liquid and gas flow ratio 80:1, the specific setting of the fluid hole and the inlet opening is same real Data 2 are tested, the oxygen content in the copper ingot base thus produced is determined to 5ppm, copper ingot base density 8.84g/cm3
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or Among changing still in the protection domain of the invention.

Claims (9)

1. a kind of process units of high-purity oxygen-free copper ingot blank, including it is sequentially communicated the melting furnace of setting(1), compartment(2)And insulation Stove(5), it is characterised in that
The compartment(2)It is additionally provided with degasifier(3), the degasifier(3)Air shooter including conveying depleted gas (31)With positioned at the compartment(2)The internal and air shooter(31)The hood that is connected of the port of export(33), it is described Hood(33)On to be provided with some apertures be 0.5-1mm steam vents;
The melting furnace(1)With the compartment(2)Pass through inlet opening(21)It is connected, inlet opening(21)Apart from the compartment(2) The distance of bottom is 0-10mm;
The hood(33)Inlet opening described in face(21)Set, the hood(33)Apart from the inlet opening(21)Away from From for 10-40mm;
On copper liquid flow direction, the hood(33)Projection be more than the inlet opening(21)Projection, the compartment(2) With the holding furnace(5)Pass through fluid hole(22)It is connected, the fluid hole(22)With the inlet opening(21)Positioned at same water In plane, and the fluid hole(22)With the inlet opening(21)Line and the inlet opening(21)The angle of center line is 15-40°。
2. the process units of high-purity oxygen-free copper ingot blank according to claim 1, it is characterised in that the hood(33)For Hollow tubular structure, its one end and the air shooter(31)It is connected, other end sealed set, the steam vent uniformly divides Cloth is on the perisporium of hollow tubular hood.
3. the process units of high-purity oxygen-free copper ingot blank according to claim 1 or 2, it is characterised in that the gas conveying Pipe(31)Entrance point be connected with the depleted gas delivery source outside the process units, and the air shooter(31)Also It is provided with the air valve of control gas flow(32).
4. the process units of high-purity oxygen-free copper ingot blank according to claim 3, it is characterised in that
The air shooter(31)It is additionally provided with gas-drying apparatus(4).
5. the process units of high-purity oxygen-free copper ingot blank according to claim 4, it is characterised in that the inlet opening(21)'s Width is 50-80mm, and its height is 80mm;
The external diameter of the hollow tubular hood is 70-100mm, and its height is 100mm;
The aperture of the steam vent is 1mm.
6. the process units of the high-purity oxygen-free copper ingot blank according to claim 4 or 5, it is characterised in that the melting furnace(1) The calcining charcoal layer of drying of the top covered with 150 ~ 250mm of thickness(8), the compartment(2)And holding furnace(5)Top covered with 100 ~ 200mm of thickness graphite flakes layer(9);
The holding furnace(5)It is additionally provided with crystallizer(7)With the casting machine for producing copper ingot base(6).
7. a kind of method for producing high-purity oxygen-free copper ingot blank using any process units of claim 1-6, including,
The degasifier(3)In be passed through depleted gas, the effusion speed of the depleted gas is 0.03-0.07L/min;
The depleted gas is carbon monoxide or the mixed gas of carbon monoxide and nitrogen, is carbon monoxide in the depleted gas With the mixed gas of nitrogen, the volume ratio of the carbon monoxide and nitrogen is(0.2-0.5):1.
8. the method for process units production high-purity oxygen-free copper ingot blank according to claim 7, including,
The compartment(2)The ratio between effusion speed of the flow velocity of middle copper liquid and the depleted gas is 30:1~100:1.
9. the method that high-purity oxygen-free copper ingot blank is produced according to the process units of claim 7 or 8, including,
(1)After negative electrode copper raw material constantly fusing, copper liquid penetrates the melting furnace(1), compartment(2)And holding furnace(5), treat described Holding furnace(5)In copper liquid when highly meeting casting demand, the holding furnace is set(5)Temperature be 1130-1165 DEG C;
(2)To the compartment(2)In be passed through depleted gas, to remove the oxygen in copper liquid;
(3)Start casting machine production oxygen-free copper ingot blank, and detect the oxygen content in oxygen-free copper ingot blank, treat that its oxygen content is less than 5ppm Afterwards, keep traction, produces high-purity oxygen-free copper ingot blank.
CN201611145890.0A 2016-12-06 2016-12-13 A kind of process units and method of high-purity oxygen-free copper ingot blank Active CN106498180B (en)

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WO2018206237A1 (en) * 2017-05-10 2018-11-15 Haldor Topsøe A/S A process for reducing the content of oxygen in metallic copper
CN107377913A (en) * 2017-06-09 2017-11-24 芜湖云邦铜业有限公司 A kind of quick deoxidization technique of molten copper protected using nitrogen
CN107354316B (en) * 2017-07-31 2019-06-11 江苏科冶科技有限公司 A kind of copper smelting apparatus convenient for detecting molten liquid component
CN107354508A (en) * 2017-08-01 2017-11-17 尚成荣 A kind of monocrystalline conductive copper bar smelting apparatus
CN109182774A (en) * 2018-10-30 2019-01-11 佛山市华鸿铜管有限公司 Online deoxidation casting apparatus and method
CN110343879B (en) * 2019-07-26 2021-09-21 浙江天宁合金材料有限公司 Oxygen-free copper-silver alloy casting production method
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
CN110629038B (en) * 2019-10-28 2021-11-19 河南科技大学 Deoxidation and desulfurization method for copper or copper alloy, high-purity copper or copper alloy and preparation method thereof
CN111304458A (en) * 2020-03-27 2020-06-19 芜湖楚江合金铜材有限公司 High accuracy red copper contact pin production is with deoxidization smelting unit
CN111822529B (en) * 2020-07-20 2022-07-15 安徽楚江高新电材有限公司 Preparation method of high-strength high-conductivity copper wire for new energy automobile
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