JP3674499B2 - Method for producing phosphorus-containing copper base material for copper plating and apparatus for producing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a phosphorous copper base material for copper plating, and a production apparatus for producing the phosphorous copper base material for copper plating by continuously producing molten copper from a melting furnace using a belt caster type continuous casting machine. About.
[0002]
[Prior art]
For example, a wiring pattern on a printed circuit board can be suitably formed by copper plating, particularly copper sulfate plating. In this copper sulfate plating, phosphorous copper (deoxygenation containing about 0.04% phosphorus) is used for the anode (anode). Copper) is used. The inclusion of phosphorus promotes the smooth dissolution of the copper anode. When a copper anode containing no phosphorus is used, the uniform adhesion of the plating film is lowered.
[0003]
The copper plating anode is formed into a rod shape, a linear shape, a sphere (ball) shape, or the like. In particular, a spherical copper plating anode is easily supplied by rolling. Conventionally, this type of anode for copper plating has been manufactured by a method in which a phosphorous copper billet is extruded and then forged or rolled, a method in which a copper ball is directly cast, and the like.
[0004]
[Problems to be solved by the invention]
By the way, most of the copper plating anodes on the market, for example, copper balls, are manufactured by the above-described method by extruding a phosphorous copper billet. In this production method, a phosphorous copper billet or cake is once extruded to form a rod shape, and then forged or rolled to produce a copper ball. This manufacturing method generally requires a costly extrusion process, and further involves forging or rolling, and thus has a drawback that the manufacturing cost is very high. In addition, since the bar material obtained by extrusion can only be obtained with a finite length of material due to the manufacturing method, it is difficult to continuously supply strands in the copper ball manufacturing process, and the copper ball can be manufactured at low cost. Could not be obtained continuously.
[0005]
Further, in the method of manufacturing by directly casting the copper ball described above, since the copper ball is directly manufactured by casting, there is no processing step such as extrusion and forging, and the cast structure remains on the copper ball, and the structure is There is a disadvantage that does not become uniform. Therefore, after cooling, the copper ball is broken, and there is a problem in quality that uniform solubility as a copper anode cannot be obtained.
[0006]
Further, as a method for continuously producing a large amount of copper wire at low cost, a method in which a belt caster type continuous casting machine and a continuous rolling device are combined is widely known. The copper wire manufactured by this method is pure copper called tough pitch copper containing 200 to 500 ppm of oxygen. If the above method is used in the production of the phosphorous copper wire used as the copper-plated phosphorous-containing copper base material, the added phosphorus and oxygen in the molten copper will be combined and go out of the system, so there is no need to introduce excess phosphorus Must not. Therefore, it is necessary to reduce the oxygen in the molten copper. However, if the oxygen concentration is lowered, the cast bar is cracked, and the rolled wire has many scratches on the surface, resulting in poor quality. This is because the oxygen concentration in the molten copper is low because the oxygen concentration in the molten copper is low when the treatment is not performed on the molten copper other than adding the additive immediately before the continuous casting machine, that is, when the dehydrogenation treatment is not performed. This is because a large number of holes are formed in the casting bar due to gas release during casting, and cracks occur in the wire. Such holes in the casting bar are caused by H ₂ O holes generated due to a decrease in the solubility of hydrogen and oxygen in the molten copper during solidification of the molten copper. Since these H ₂ O holes are trapped during cooling, they are scratched during rolling. Thermodynamically, the concentration of hydrogen and oxygen in the molten copper has a relationship represented by the following equation.
[H] ² [O] = p _H2O · K Equation (A)
here,
[H]: Hydrogen concentration in molten copper [O]: Oxygen concentration in molten copper p _H2O : Water vapor partial pressure in atmosphere K: Equilibrium constant.
[0007]
The equilibrium constant K is a function of temperature, and becomes a constant at a constant temperature. Therefore, the oxygen concentration and the hydrogen concentration in the molten copper are in an inversely proportional relationship. For this reason, the reduction concentration, that is, the deoxidation, the hydrogen concentration increases, holes are easily formed during solidification, and only the phosphor-containing copper base material for copper plating with many scratches and poor surface quality can be produced. Therefore, if not only deoxygenation but also dehydrogenation is performed, a large amount of holes are generated at the time of solidification, and a high-quality phosphorus-containing copper base material for copper plating cannot be manufactured. .
[0008]
The present invention has been made in view of the above situation, and provides a manufacturing method and a manufacturing apparatus for a phosphorus-containing copper base material for copper plating that can suppress the generation of holes while containing phosphorus. The object is to mass-produce high quality copper plating anodes at low cost.
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, molten copper is supplied to a belt caster type continuous casting machine, and a rod-shaped, linear or spherical copper plating anode is continuously formed from a casting base wire derived from the belt caster type continuous casting machine. A method for producing a phosphor-containing copper base material for copper plating that is manufactured in a manufacturing method, comprising a step of combusting in a reducing atmosphere of a melting furnace to form molten copper, and a molten copper sent from the melting furnace in a non-oxidizing atmosphere The step of transporting to the tundish using the cast iron that can be sealed with the above, the step of dehydrogenating the molten copper passing through the cast iron, and the melt after deoxidation and dehydrogenation through these steps. Adding phosphorus to copper.
[0010]
In this method for producing a phosphorous copper base material for copper plating, a belt caster type continuous casting machine is used, and a long cast base material can be continuously produced at a low cost. And since there is little gas discharge | release, generation | occurrence | production of a hole is suppressed and the damage | wound of a wire surface is reduced, a casting base wire is not broken and the phosphorus-containing copper base material for copper plating with favorable surface quality is obtained. Further, a cast bus bar that is resistant to bending can be obtained, and for example, when a spherical copper plating anode is manufactured, cracking is prevented. In addition, by using a belt caster type continuous casting machine, there is a hot rolling process after casting, there is no residue of the cast structure that occurs when the anode for copper plating is directly cast, and uniform by recrystallization An anode for copper plating with a smooth structure can be obtained.
[0011]
Invention of Claim 2 is a manufacturing method of the phosphor-containing copper base material for copper plating of Claim 1, Comprising: The process of rolling the said casting bus | bath, and the phosphor-containing copper mother for copper plating after rolling Cutting the material into a predetermined length, and continuously producing a short phosphorous copper base material for copper plating.
The invention according to claim 3 is the method for producing a phosphorous copper base material for copper plating according to claim 2, wherein the short phosphorous copper base material for copper plating is washed with alcohol. It is characterized by.
[0012]
In such a method for producing a phosphorus-containing copper base material for copper plating, the casting base wire is cut into a short length, so that a winding process necessary for obtaining a long length of the phosphorus-containing copper base material for copper plating is unnecessary. Therefore, the number of processes can be reduced.
Further, it is possible to eliminate the need for lubricating oil such as wax, which is necessary when winding in a coil shape. If lubricating oil remains when processing a phosphorous copper base material for copper plating into copper balls, the quality of the copper balls and hence the anode for copper plating may be significantly reduced. High quality copper balls can be manufactured.
Moreover, if the phosphorus-containing copper base material for copper plating is washed with an alcohol such as IPA (isopropyl alcohol), for example, a phosphor-containing copper base material for copper plating with high surface quality, in particular, gloss can be obtained.
[0013]
The apparatus for producing a phosphorus-containing copper base material for copper plating according to claim 4 supplies molten copper to a belt caster type continuous casting machine, and forms a rod-like wire from a cast base wire derived from the belt caster type continuous casting machine. Manufacturing apparatus for continuously producing a phosphorous copper base material for copper plating having a shape or a spherical shape, comprising a melting furnace for producing molten copper by burning in a reducing atmosphere, and a molten copper sent from the melting furnace A holding furnace that holds at a predetermined temperature, a cast iron that seals the molten copper sent from the holding furnace in a non-oxidizing atmosphere and transfers it to the tundish, and a dehydrogenation treatment of the molten copper that is provided in the casting iron and passes therethrough A degassing means and a phosphorus addition means for adding phosphorus to the molten copper after deoxidation and dehydrogenation through these melting furnace, holding furnace, and casting iron are provided.
[0014]
In this phosphor-containing copper base material manufacturing apparatus for copper plating, combustion is performed in a reducing atmosphere in a melting furnace, and the molten copper is deoxidized. The deoxidized molten copper is sealed in a non-oxidizing atmosphere in a cast iron and transferred to a tundish. The molten copper deoxidized in the melting furnace has a high hydrogen concentration because the oxygen concentration and the hydrogen concentration are in an inversely proportional relationship. The molten copper having a high hydrogen concentration is dehydrogenated by the degassing means when passing through the casting iron. As a result, gas emission during casting is reduced, holes generated in the casting base wire are suppressed, and scratches on the wire surface are reduced.
[0015]
The apparatus for producing a phosphorous copper base material for copper plating according to claim 5 is the apparatus for producing a phosphorous copper base material for copper plating according to claim 2, wherein the degassing means agitates the molten copper. It is characterized by being a stirring means.
[0016]
In this apparatus for producing a phosphor-containing copper base material for copper plating, the hydrogen in the molten copper is forcibly expelled by stirring the molten copper, and dehydrogenation treatment can be performed. In other words, since the cast iron is provided with a stirring means for contact with molten copper, the molten copper before being transferred to the tundish is stirred against the stirring means and blown to form a non-oxidizing atmosphere. And contact property with molten copper becomes favorable. At this time, since the hydrogen partial pressure in the inert gas is extremely small with respect to the hydrogen partial pressure of the molten copper, the hydrogen in the molten copper is taken into the inert gas and the molten copper can be dehydrogenated.
[0017]
The manufacturing apparatus of the phosphorus-containing copper base material for copper plating of Claim 6 is a manufacturing apparatus of the phosphorus-containing copper base material for copper plating of Claim 3, Comprising: The said stirring means is the said molten copper to pass. It is comprised by the weir which meanders a flow path.
[0018]
In this apparatus for producing a phosphorous copper base material for copper plating, the molten copper passing through the casting iron is caused to flow in a meandering manner by the weir, and is agitated by vigorous flow. That is, it can be automatically stirred by the flow of the molten copper itself. Thus, since the molten copper flows vigorously up and down or left and right by the weir, there is an opportunity for the molten copper flowing through the cast iron to uniformly contact the inert gas, and the efficiency of the dehydrogenation treatment is further enhanced.
In this case, for example, a rod-like or plate-like weir provided in the molten copper flow path is suitable. Further, a plurality of weirs may be provided in the direction of molten copper flow, or a plurality of weirs may be provided in a direction orthogonal to the molten copper flow. Furthermore, if this weir is made of, for example, carbon, deoxidation treatment can be efficiently performed by contact between the molten copper and carbon.
[0019]
Invention of Claim 7 is a manufacturing apparatus of the phosphorus-containing copper base material for copper plating in any one of Claims 4-6, Comprising: By the rolling mill which rolls the said casting bus | bath, and this rolling mill Cutting means for cutting the rolled phosphorous-containing copper base material for copper plating into a predetermined length.
The invention according to claim 8 is the manufacturing apparatus for the phosphor-containing copper base material for copper plating according to claim 7, wherein the phosphor-containing copper mother for copper plating cut to a predetermined length by the cutting means. An alcohol cleaning means for cleaning the material with alcohol is provided.
[0020]
In such an apparatus for producing a phosphorous copper base material for copper plating, the method for producing a phosphorous copper base material for copper plating according to claim 2 or claim 3 can be suitably implemented.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a method for producing a phosphorous copper base material for copper plating and an apparatus for producing the same according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram schematically showing an apparatus for producing a phosphorous copper base material for copper plating according to the present invention, and FIG. 2 shows the cast iron of FIG. 1 in a plan view (a) and a side view (b). It is sectional drawing.
[0022]
An apparatus 1 for producing a phosphor-containing copper base material for copper plating according to the present embodiment includes a melting furnace A, a holding furnace B, a casting rod C, a belt caster continuous casting machine D, and a rolling mill. E and coiler F are roughly divided.
[0023]
As the melting furnace A, for example, a shaft furnace having a cylindrical furnace body is suitably used. In the lower part of the melting furnace A, a plurality of burners (not shown) in the circumferential direction are provided in multiple stages in the vertical direction. In this melting furnace A, combustion is performed in a reducing atmosphere to produce molten copper (hot water). The reducing atmosphere can be obtained, for example, by increasing the fuel ratio in a mixed gas of natural gas and air.
[0024]
The holding furnace B is for sending the hot water sent from the melting furnace A to the casting iron C while maintaining a predetermined temperature.
The cast iron C is sealed in the non-oxidizing atmosphere with hot water sent from the holding furnace B and transferred to the tundish 5. As shown in FIG. 2, the sealing is performed by covering the upper surface of the molten copper flow path (molten copper flow path) 31 of the cast iron C with a cover 8. This non-oxidizing atmosphere is formed, for example, by blowing a mixed gas of nitrogen and carbon monoxide or a rare gas such as argon into the casting rod C as an inert gas. The cast iron C is provided with a stirring means (degassing means) 33 described later for dehydrogenating the hot water passing therethrough.
[0025]
A phosphorus addition means (not shown) is provided in the vicinity of the terminal portion of the cast iron C so that phosphorus can be added to the hot water. By this phosphorus addition means, it is possible to add phosphorus to the deoxygenated and dehydrogenated hot water, prevent the reaction between phosphorus and oxygen, and turbulent flow in the tundish 5 that occurs immediately after the phosphorus. And molten copper can be mixed well.
In addition, the place where this phosphorus addition means is provided is not limited to the terminal part vicinity of the casting iron C. That is, it may be added to the hot water after the dehydrogenation treatment and sufficiently diffused, and may be provided between the end of the cast iron C and the end of the tundish 5.
[0026]
The tundish 5 is provided with a pouring nozzle 9 at the end of the hot water flow direction so that hot water from the tundish 5 is supplied to the belt caster type continuous casting machine D.
[0027]
A belt caster continuous casting machine D is connected to the holding furnace B via a casting rod C. The belt caster type continuous casting machine D includes an endless belt 11 that moves around and a casting wheel 13 that rotates while contacting a part of the circumference with the endless belt 11. The casting machine D is further connected to a rolling mill E.
[0028]
The rolling mill E is for rolling the cast bus bar 23 that is output from the casting machine D. This rolling mill E is connected to a coiler F via a shear (cutting means) 15 and a flaw detector 19.
The shear 15 is provided with a pair of rotary blades 16 and 16 for cutting the cast base wire 23 rolled by the rolling mill E, that is, the phosphorus-containing copper base material 25 for copper plating into a short length. For example, immediately after the start of operation of the belt caster type continuous casting machine D, the internal structure of the cast bus bar 23 is not stable, and the phosphorous copper base material 25 for copper plating obtained in such a state is stable in quality. It cannot be a finished product. In such a case, the phosphor-containing copper base material 25 for copper plating that has come out of the casting machine D is sequentially cut by the shear 15 so as not to be sent to the flaw detector 19 and the coiler F until the quality is stabilized. When the quality of the casting base material 23 is stabilized, the rotating fields 16 and 16 are separated from the phosphorous copper base material 25 for copper plating, and the phosphorous copper base material 25 for copper plating is sent to the flaw detector 19 and the coiler F. To do.
[0029]
Here, as described above, deoxidation and dehydrogenation are important for producing a low-oxygen copper wire with good surface quality. In the present embodiment, as shown in FIG. 2, stirring means (degassing means) 33 are provided in the molten copper flow path 31 in the cast iron C as means for degassing including dehydrogenation treatment. The stirring means 33 is composed of weirs 33a, 33b, 33c, and 33d, and allows hot water to flow while being vigorously stirred.
[0030]
The weir 33 a is provided on the upper side of the molten copper flow path 31, that is, on the cover 8. The weir 33 b is provided below the molten copper flow path 31, the weir 33 c is provided on the left side of the molten copper flow path 31, and the weir 33 d is provided on the right side of the molten copper flow path 31. By these weirs 33a, 33b, 33c, and 33d, hot water is stirred in the direction of the arrow in FIG. In addition, in FIG.2 (b), the hot_water | molten_metal surface is shown as the code | symbol 32. FIG.
The weirs 33c and 33d can increase the efficiency of the degassing treatment even if the length of the hot water flow channel is made longer than the actual length of the molten copper flow channel 31 and the cast iron C is short. It is. The weirs 33a and 33b serve to prevent mixing of the molten copper and the atmospheric gas before and after the degassing process.
The stirring means 33 is mainly for performing a dehydrogenation process, but oxygen remaining in the hot water can also be driven out by stirring the hot water. That is, as the degassing process, both the dehydrogenation process and the second deoxidation process are performed. If these weirs 33a, 33b, 33c, and 33d are made of, for example, carbon, deoxidation treatment can be efficiently performed by contact between the molten copper and carbon.
[0031]
In the belt caster type casting machine D, it is necessary to provide the holding furnace B in order to store and raise the temperature of the molten copper. The degassing process in the present embodiment is a transfer process after the holding furnace B. Need to be done. The reason is that the holding furnace B performs combustion in a reducing atmosphere or deoxidation with a reducing agent in order to obtain a low-oxygen copper wire, so that the hydrogen concentration inevitably increases due to the relationship of the above equilibrium equation (A). It is.
[0032]
Furthermore, as a position for performing the degassing process, the degassing process in the tundish 5 immediately before casting is not preferable. The reason is that when hot water is vigorously stirred in the tundish 5, for example, bubbling, the hot water surface vibrates violently, the head pressure of the hot water coming out of the pouring nozzle 9 fluctuates, and stable molten copper is produced. This is because it is not supplied to the casting machine D. On the other hand, the degassing effect cannot be expected as long as the molten metal surface does not vibrate vigorously. Also from this, it is preferable to perform the degassing process in the transfer process from the holding furnace B to the tundish 5.
[0033]
The manufacturing method of the phosphorus containing copper base material for copper plating using the manufacturing apparatus 1 of the phosphorus containing copper base material for copper plating comprised in this way is demonstrated.
First, combustion is performed in a reducing atmosphere in the melting furnace A, and the molten copper is deoxidized. The deoxidized molten copper is sealed in a non-oxidizing atmosphere in the casting basket C and transferred to the tundish 5. The molten copper deoxidized in the melting furnace A has a high hydrogen concentration because the oxygen concentration and the hydrogen concentration are in an inversely proportional relationship. The molten copper having a high hydrogen concentration is dehydrogenated by the stirring means 33 when passing through the casting iron C.
[0034]
Thereby, molten copper is adjusted to oxygen 20ppm or less and hydrogen 1ppm or less. Then, phosphorus is added from the phosphorus adding means to the molten copper whose oxygen concentration and hydrogen concentration are adjusted so that the phosphorus content is 40 to 1000 ppm.
[0035]
Moreover, since the gas concentration of molten copper falls by lowering | hanging water vapor partial pressure from the relationship of equilibrium type | formula (A), the molten copper before performing a dehydrogenation process and the molten copper after a dehydrogenation process are isolate | separated completely. And a further degassing effect can be obtained. This can be realized, for example, by providing the stirring means 33 as described above in the transfer process. That is, the stirring means 33 also serves to prevent the mixing of the atmospheric gas before and after the dehydrogenation process and the mixing of the molten copper.
[0036]
Here, if the oxygen concentration, hydrogen concentration, and phosphorus content are outside the above ranges, the following inconvenience occurs. That is, when oxygen is not 20 ppm or less, workability is poor and cracks occur in the cast bar. When the hydrogen content is not 1 ppm or less, gas is released frequently and cracks occur in the cast bar. When phosphorus is not more than 40 ppm, uniform solubility cannot be obtained when used as an anode, and the material of the copper ball is not obtained. Moreover, when phosphorus is not 1000 ppm or less, bendability will worsen.
[0037]
The separation by the stirring means 33 is not limited to one place, and may be appropriately installed according to the length of the transfer process. In addition, weirs 33a, 33b, 33c, and 33d are provided on the upper, lower, left, and right sides of the molten copper flow path 31 as the agitation means 33. However, it does not matter.
[0038]
In this way, by adjusting the oxygen concentration and hydrogen concentration, and casting and rolling the molten copper after adding phosphorus, the release of gas during casting is reduced, and the holes generated in the casting base material 23 are suppressed. As a result, scratches on the wire surface are reduced.
[0039]
As described above, the molten copper transferred from the melting furnace A to the holding furnace B is heated, and then supplied to the belt caster continuous casting machine D through the casting rod C and the tundish 5, and the belt caster continuous casting is performed. Continuous casting is performed in the casting machine D, and when the belt caster type continuous casting machine D is exited, the casting base wire 23 is formed. The cast bus bar 23 is rolled by a rolling mill E to become a phosphorus-containing copper base material 25 for copper plating containing a predetermined amount of phosphorus and having good surface quality. The phosphorus-containing copper base material 25 for copper plating is wound around the coiler F while applying a lubricating oil such as wax after the flaw detector 19 detects the presence or absence of scratches. The phosphorus-containing copper base material 25 for copper plating is sent to a separate process, and is appropriately formed into, for example, a copper ball.
[0040]
Further, separately from such a manufacturing method, the phosphorus-containing copper base material 25 for copper plating cut into short pieces may be directly manufactured using the shear 15.
As shown in FIG. 3, the continuous long copper-containing phosphorous copper base material 25 for copper plating that has come out of the rolling mill E is formed into a short copper-plating phosphorous copper base material 25 b by the blade portion 16 a of the rotary blade 16. Cut sequentially. Then, the short phosphorous-containing copper base material 25b for copper plating is put into an alcohol bath (alcohol cleaning means) 18 provided under the shear 15 and into which alcohol 18a is injected.
[0041]
The phosphorus-containing copper base material 25 for copper plating coming out of the rolling mill E is still at a high temperature, and its surface is oxidized by air to form a thin oxide film. However, by introducing the short phosphorous-containing copper base material 25b for copper plating into the alcohol 18a, the surface is washed and the oxide film is reduced to improve the surface quality, particularly the gloss. As this alcohol 18a, IPA (isopropylene alcohol) is preferable.
[0042]
The rotary blades 16 and 16 are each provided with four blade portions 16a, but the number of the blade portions 16a can be appropriately changed.
[0043]
In such a manufacturing method, the phosphorous copper base material 25 for copper plating is cut into a predetermined length to directly produce the phosphorous copper base material 25b for short copper plating. A process for winding the coiler F necessary for obtaining the material 25 can be omitted, and the number of processes can be reduced. As a result, for example, a copper ball can be manufactured more inexpensively and easily. it can.
In addition, it eliminates the need for lubricating oil such as wax, which is necessary when winding in the form of a coil, and eliminates the risk of significantly reducing the quality of copper balls and, consequently, the anode for copper plating, producing high-quality copper balls. Quality stability can be remarkably improved.
Further, if the cast base wire is washed with, for example, an alcohol 18a such as IPA (isopropyl alcohol), a short phosphorous copper base material 25b for copper plating having a good surface quality and particularly high gloss can be obtained. Furthermore, since alcohol is used for cleaning and surface treatment, handling and disposal can be facilitated as compared with acids that are considered useful for surface treatment.
[0044]
【The invention's effect】
As described above in detail, the method for producing a phosphorus-containing copper base material for copper plating according to the present invention can use a belt caster type continuous casting machine, so that a long cast base material can be continuously produced at low cost. Can be manufactured. And since there are few gas discharge | releases and the production | generation of a hole can be suppressed and the damage | wound of a wire surface can be reduced, a casting preform | base_wire is not cracked and the phosphorus-containing copper preform | base_material for copper plating with favorable surface quality can be obtained. Furthermore, since a cast bus bar which is strong against bending can be obtained, cracking when a spherical anode for copper plating is manufactured can be prevented. In addition, since a belt caster type continuous casting machine is used, there is a hot rolling process after casting, and it is possible to eliminate the residual cast structure that occurs when the copper plating anode is directly cast, and it is uniform by recrystallization. An anode for copper plating having a simple structure can be obtained.
As a result, high quality copper plating anodes can be mass-produced at low cost.
[0045]
The apparatus for producing a phosphor-containing copper base material for copper plating according to the present invention is such that the molten copper is burned in a reducing atmosphere in the melting furnace and transferred from the melting furnace to the tundish through the holding furnace. In addition, since the molten copper that has been sealed in a non-oxidizing atmosphere and passes through the cast iron is dehydrogenated by the degassing means, the hydrogen concentration that becomes higher as it is deoxidized by reduction can be lowered. As a result, the generation of holes can be suppressed, and a high-quality phosphorous-containing copper base material for copper plating without scratches on the cast base wire surface can be manufactured.
[0046]
Further, if the degassing means is an agitating means for stirring the molten copper, the dehydrogenation treatment can be forcibly performed in a short time, so that the dehydrogenation treatment can be efficiently performed with a simple configuration.
[0047]
Furthermore, if the stirring means is constituted by a weir that meanders the flow path of the molten copper passing therethrough, it is automatically stirred by the flow of the molten copper itself, so there is no need to use an agitator or the like, and a simpler configuration. Thus, the dehydrogenation process can be performed efficiently and the operation management of the phosphor-containing copper base material for copper plating can be easily performed.
[Brief description of the drawings]
FIG. 1 is a diagram for illustrating an embodiment of a method for producing a phosphorous copper base material for copper plating according to the present invention, and is a configuration diagram schematically showing a production apparatus.
2 is a cross-sectional view of the cast iron shown in FIG. 1 in a plan view (a) and a side view (b).
FIG. 3 is a view for illustrating another example of the embodiment of the method for producing the phosphor-containing copper base material for copper plating according to the present invention, and is a configuration diagram schematically showing a production apparatus;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus of phosphorus-containing copper base material for copper plating 5 Tundish 15 Shear (cutting means)
18 Alcohol bath (alcohol cleaning means)
18a Alcohol 23 Cast bus bar 25 Phosphorus-containing copper base material 25b for copper plating Short-length phosphorus-containing copper base material 31 for copper plating Molten copper channel (molten copper channel)
33 Stirring means (degassing means)
33a, 33b, 33c, 33d Weir A Melting furnace B Holding furnace C Casting iron D Belt caster type continuous casting machine

Claims (8)

A method for supplying molten copper to a belt caster type continuous casting machine and continuously producing a phosphorus-containing copper base material for copper plating from a casting base wire derived from the belt caster type continuous casting machine. A process of making molten copper by burning in a reducing atmosphere, a process of transferring molten copper sent from the melting furnace to a tundish using a cast iron that can be sealed in a non-oxidizing atmosphere, and passing through the cast iron A process for dehydrogenating the molten copper, and a process for adding phosphorus to the molten copper that has been deoxidized and dehydrogenated through these processes. A method for producing a copper base material. Rolling the cast bus bar;
Cutting the phosphorus-containing copper base material for copper plating after rolling into a predetermined length;
2. The method for producing a phosphorous copper base material for copper plating according to claim 1, wherein a short phosphorous copper base material for copper plating is continuously produced. 3. The method for producing a phosphorous copper base material for copper plating according to claim 2, wherein the short phosphorous copper base material for copper plating is washed with alcohol. A manufacturing apparatus for supplying molten copper to a belt caster type continuous casting machine and continuously producing a phosphorus-containing copper base material for copper plating from a casting base wire derived from the belt caster type continuous casting machine A melting furnace for producing molten copper by burning in an atmosphere, a holding furnace for holding the molten copper sent from the melting furnace at a predetermined temperature, and sealing the molten copper sent from the holding furnace in a non-oxidizing atmosphere After degassing and dehydrogenation through a casting iron that is transferred to the tundish, a degassing means that dehydrogenates the molten copper that is provided in the casting iron, and these melting furnace, holding furnace, and casting iron An apparatus for producing a phosphorus-containing copper base material for copper plating, comprising: a phosphorus adding means for adding phosphorus to the molten copper. The said degassing means is a stirring means which stirs the said molten copper, The manufacturing apparatus of the phosphorus containing copper base material for copper plating of Claim 4 characterized by the above-mentioned. The said stirring means is comprised with the weir which meanders the flow path of the said molten copper, The manufacturing apparatus of the phosphorous copper base material for copper plating of Claim 5 characterized by the above-mentioned. A rolling mill for rolling the cast bus bar;
Cutting means for cutting the phosphor-containing copper base material for copper plating rolled into a predetermined length by the rolling machine;
The manufacturing apparatus of the phosphorus-containing copper base material for copper plating in any one of Claims 4-6 characterized by the above-mentioned. 8. The phosphorus-containing copper base material for copper plating according to claim 7, further comprising alcohol cleaning means for cleaning the phosphorus-containing copper base material for copper plating cut to a predetermined length by the cutting means with alcohol. Manufacturing equipment.

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