CN214768788U - Improved multi-element copper alloy up-drawing furnace - Google Patents
Improved multi-element copper alloy up-drawing furnace Download PDFInfo
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- CN214768788U CN214768788U CN202121677682.1U CN202121677682U CN214768788U CN 214768788 U CN214768788 U CN 214768788U CN 202121677682 U CN202121677682 U CN 202121677682U CN 214768788 U CN214768788 U CN 214768788U
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Abstract
The utility model discloses a stove is drawn on modified many first copper alloy, include: the inner cavity of the open molten pool comprises a smelting cavity, a transition cavity and an upward leading cavity, wherein the bottom of the smelting cavity is communicated with the bottom of the transition cavity; the bottom of the smelting cavity, the bottom of the transition cavity and the bottom of the upward leading cavity are provided with inner cavity circulating melting channels, and/or the transition cavity is communicated with the smelting cavity and the upward leading cavity to be provided with inter-cavity melting channels. An intra-cavity circulating melting channel is arranged in a transition cavity of the improved multi-element copper alloy up-drawing furnace, molten liquid entering the intra-cavity circulating melting channel is heated at the melting channel and then moves upwards, the temperature of copper liquid in the transition cavity is maintained, and the problem that the surface layer of the molten copper alloy liquid freezes copper to influence slag removal is avoided; the circulation molten liquid in the transition cavity is intensified by the circulation molten channel in the cavity, part of impurities float upwards along with the upward molten liquid, and the slag discharge amount in the transition cavity is increased.
Description
Technical Field
The utility model relates to a draw and cast technical field, concretely relates to stove is drawn on modified many first copper alloy.
Background
The lightweight requirements in the fields of medical wire harnesses, robot wire harnesses, ABS wire harnesses, loudspeaker wire harnesses, automobile wire harnesses and the like enable the copper and copper alloy ultra-micro wires to be rapidly developed and the demand to be increased rapidly. The prepared ultramicro filament (with the wire diameter of 0.01-0.03 mm) has high requirements on the purity and the structure of a base material.
In the prior art, a smelting furnace for producing oxygen-free copper materials is disclosed in CN2874383Y, wherein a furnace chamber is divided into an upward-leading area, a transition area and a melting area, the bottoms of the three areas are communicated, a melting channel is arranged at the bottom of the upward-leading area and the bottom of the melting area, and the melting channel is not arranged in the transition area. The furnace chamber is used for the ultramicro nut wire upward leading production, and the following technical problems exist: the alloy composition of the first and ultra-micro wire buses contains a certain amount of iron, compared with pure copper, the alloy smelting temperature is about 50-100 ℃, a melting channel is not arranged in an upward leading area, and when the production environment is low, the heat loss of the copper alloy liquid level can cause the frozen copper, namely the surface layer to be solidified, so that the slag discharge in a transition area is not facilitated; secondly, impurities in the copper alloy float or sink along with the molten liquid, and part of floating impurities in the transition region can directly enter the upward-leading region, so that the impurities in the upward-leading furnace are obviously increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect that exists among the prior art, provide a stove is drawn on modified many first copper alloy, be provided with the intracavity circulation in the transition chamber and melt the ditch, reduce and freeze the copper probability, aggravate the melt circulation, promote the impurity come-up in the copper alloy.
In order to realize the technical effect, the utility model discloses a technical scheme does: an improved multi-element copper alloy up-drawing furnace, comprising:
the inner cavity of the open molten pool comprises a smelting cavity, a transition cavity and an upward leading cavity, wherein the bottom of the smelting cavity is communicated with the bottom of the transition cavity;
the bottom of the smelting cavity, the bottom of the transition cavity and the bottom of the upward-leading cavity are provided with inner-cavity circulating melting channels, and/or the transition cavity is communicated with the smelting cavity and the upward-leading cavity to be provided with inter-cavity melting channels.
The optimized technical scheme is that the inner cavity circulating melting channel is respectively arranged at the bottoms of the melting cavity, the transition cavity and the upward-leading cavity, and communicated ports are formed in the partition plates between the melting cavity and the transition cavity and between the transition cavity and the upward-leading cavity.
The preferable technical scheme is that the molten pool is a graphite molten pool.
The preferable technical scheme is that the melting bath and the clapboard are integrally connected, and the melting bath and the clapboard are made of graphite materials.
The preferable technical scheme is that the molten pool is provided with a furnace cover, an inert gas pipe is arranged in an opening of the molten pool, or an inert gas pipe is arranged between the furnace cover and the opening of the molten pool; the inert gas pipe is communicated with a gas source and is provided with a vent hole corresponding to at least one of the smelting cavity, the transition cavity and the upward leading cavity.
The preferable technical scheme is that the inert gas pipe is arranged around the open enclosure of the molten pool, or the inert gas pipe and the open inner edge of the molten pool are correspondingly arranged in an enclosing manner from top to bottom; the exhaust holes are arranged towards the centers of preset liquid levels of the smelting cavity, the transition cavity and the upward leading cavity.
The preferable technical scheme is that the inert gas pipe comprises a preheating section and an exhaust section which are communicated, and the exhaust hole is formed in the exhaust section.
The utility model has the advantages and the beneficial effects that:
an intra-cavity circulating melting channel is arranged in a transition cavity of the improved multi-element copper alloy up-drawing furnace, molten liquid entering the intra-cavity circulating melting channel is heated at the melting channel and then moves upwards, the temperature of copper liquid in the transition cavity is maintained, and the problem that the surface layer of the molten copper alloy liquid freezes copper to influence slag removal is avoided;
the circulation molten liquid in the transition cavity is intensified by the circulation molten channel in the cavity, part of impurities float upwards along with the upward molten liquid, and the slag discharge amount in the transition cavity is increased.
Drawings
FIG. 1 is a schematic view showing the construction of a modified multiple copper alloy up-drawing furnace according to example 1;
FIG. 2 is a schematic view showing the construction of a modified multiple copper alloy up-drawing furnace of example 2;
FIG. 3 is a schematic structural view of a modified multiple copper alloy up-drawing furnace of example 3;
in the figure: 1. a molten pool; 11. a smelting chamber; 12. a transition chamber; 13. an upper drainage cavity; 14. a partition plate; 15. a communication port; 2. circulating a melting channel in the cavity; 3. an interlumen melt channel; 4. a furnace cover; 5. an inert gas pipe; 51. a preheating section; 52. an exhaust section; 53. and (4) exhausting holes.
Detailed Description
The following describes the present invention with reference to the following embodiments. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The molten pool is built by graphite sheets or is integrally sintered, compared with the traditional refractory brick-built molten pool, the molten pool is beneficial to reducing the impurity content in the copper alloy, and the slag tapping rate in the copper alloy smelting process is reduced. The integrally sintered bath has a lower copper alloy impurity content and slag tapping rate than a bath built of graphite sheets.
A furnace shell is usually arranged outside the graphite melting bath, and an insulating paint layer, a furnace building sand layer, a refractory brick layer and the like are arranged between the furnace shell and the melting bath, for example, on the inner surface of the furnace shell.
The number and size of the melting channels are comprehensively determined according to the size of the furnace body, the quality of the copper alloy led up in unit time and the amount of impurities in the molten liquid.
Optionally, the molten pool adopts a partition plate to divide the inner cavity of the molten pool into a plurality of cavities, a communication port for communicating adjacent cavities is arranged on the partition plate, and the molten channel is arranged at the bottom of a single cavity and used for completing internal circulation of molten liquid in the cavity, namely the circulating molten channel in the cavity; or the melting channel is arranged between two adjacent cavities and is used for guiding the molten liquid in one cavity into the other cavity, namely the inter-cavity melting channel. The cavity includes but not limited to smelting chamber, transition chamber and draws the chamber on, the bottom intercommunication of above-mentioned three cavity, and further, two liang of intercommunications in proper order between the three cavity, smelt the chamber and communicate with the transition chamber promptly, the transition chamber with draw the chamber intercommunication on, smelt the chamber and draw the chamber on and do not directly communicate. The arrangement of the channel is determined by the composition of the copper alloy and the impurities that may be generated.
Preheating section and exhaust section of inert gas pipe
The normal temperature inert gas is directly sprayed on the liquid surface of the molten pool, so that the local temperature of the liquid surface is reduced. The preheating section utilizes the rising hot air in the furnace to preheat the inert gas in the tube, thereby reducing the use of inert gas heating elements outside the furnace.
Shape of the exhaust section
The exhaust section is a straight tube shape, or is arranged along the enclosing of the inner edge of the opening, the enclosing angle is not particularly limited, preferably at least one circle or slightly less than one circle is enclosed, the exhaust holes are uniformly distributed along the extending direction of the exhaust section, or the opening of the molten pool is rectangular or elongated, and the exhaust holes are arranged on the exhaust section which is oppositely arranged along the long edge of the rectangle.
The opening of the molten pool is rectangular or long-strip-shaped, and the center of the preset liquid level is in a central line shape. The exhaust hole faces to the center of the preset liquid level of the molten pool, the air flow at the center ascends and descends after meeting the furnace cover, and the inert gas circulation that the central air flow ascends and the peripheral air flow descends is formed.
Example 1
As shown in fig. 1, the improved multi-element copper alloy up-converter of example 1 includes: open molten bath 1, the inner chamber of molten bath 1 is including smelting chamber 11, transition chamber 12 and the upward chamber 13 that draws that sets up side by side, smelt and be provided with baffle 14 between two adjacent cavitys in chamber 11, transition chamber 12 and the upward chamber 13 that draws, and the bottom of baffle 14 is provided with intercommunication mouth 15, and the bottom of smelting chamber 11, transition chamber 12 and the upward chamber 13 that draws all is provided with intracavity circulation and melts ditch 2.
The open melting bath 1 and the partition plate 14 are made of graphite and are integrally connected.
The covering agent is covered on the surface of the copper alloy melt in the embodiment 1, so that the effects of keeping the temperature of the liquid level of the copper alloy melt, insulating heat and reducing the reaction of active elements in the copper alloy and oxygen are achieved.
Example 2
As shown in fig. 2, the improved multi-element copper alloy up-drawing furnace of embodiment 2 includes an open graphite molten pool 1, an inner cavity of the molten pool 1 includes a smelting cavity 11, a transition cavity 12 and an up-drawing cavity 13 which are arranged side by side, the smelting cavity 11 and the transition cavity 12 are communicated and provided with an inter-cavity molten channel 3, the transition cavity 12 and the up-drawing cavity 13 are also communicated and provided with an inter-cavity molten channel 3, a partition plate 14 is arranged between two adjacent cavities in the smelting cavity 11, the transition cavity 12 and the up-drawing cavity 13, and a communication port 15 is arranged at the bottom of the partition plate 14.
Example 3
As shown in fig. 3, the embodiment 3 is based on the embodiment 1, and is different from the embodiment 1 in that a graphite molten pool 1 is provided with a furnace cover 4, an inert gas pipe 5 is fixedly connected with the furnace cover 4, the inert gas pipe 5 is arranged between the bottom surface of the furnace cover 1 and an opening of the molten pool 1, and comprises a preheating section 51 and an exhaust section 52 which are communicated; the inert gas pipe 5 is communicated with a gas source, and the inert gas pipe 5 is provided with exhaust holes 53 corresponding to the smelting cavity 11, the transition cavity 12 and the upward leading cavity 13. The gas source outside the molten pool 1 outputs inert gas, the heat of the copper alloy in the inner cavity of the molten pool 1 is conducted to the preheating section, the temperature of the inert gas in the preheating section 51 is increased, and finally the inert gas is discharged to the upper part of the covering agent on the liquid surface of the molten pool 1 through the exhaust hole 53 of the exhaust section 52.
The inert gas pipe and the inner edge of the opening of the molten pool 1 are correspondingly arranged in an enclosing way up and down; the degassing holes 53 are arranged towards the predetermined liquid level centres of the smelting chamber 11, the transition chamber 12 and the uptake chamber 13, which centres are point-like or linear. Openings of the smelting cavity 11, the transition cavity 12 and the upward leading cavity 13 are rectangular, and airflow of the exhaust hole 53 ascends at the center of a preset liquid level and descends after meeting the furnace cover 4 to form inert gas circulation that central airflow ascends and peripheral airflow descends.
The dimensions of the molten pools of examples 1 to 3 and comparative example were 5.397m in length of the inner cavity of the molten pool, 0.4m in width and 0.5m in height; the side wall thickness of the molten pool is 150mm, and the bottom wall thickness is 150 mm; the internal diameter of the melting channel is 580mm, the melting cavity, the transition cavity and the upward-leading cavity are arranged side by side in embodiment 3, and the volume ratio of the melting cavity, the transition cavity and the upward-leading cavity in the row direction is 2.179: 1: 2.218.
the continuous production process for smelting and drawing the copper alloy of the embodiment 1, the embodiment 2, the embodiment 3 and the comparative example comprises the following steps: ventilating, electrifying to heat a molten channel, feeding, preserving heat, upward leading, wherein the copper alloy mainly comprises the following components: aluminum, manganese, copper, iron and nickel. In the embodiment 3, the normal-temperature inert gas is continuously introduced into the inert gas pipe in the smelting process, and the flow rate is 15-20L/min; copper alloy raw materials are added from a smelting cavity of a molten pool, and are heated by an induction coil at a circulating molten channel and/or a molten channel between cavities in the cavity, molten liquid flows into the smelting cavity through a communication port in embodiment 1, molten liquid sequentially flows into a transition cavity and an upward-leading cavity through the communication port and the molten channel between the cavities in embodiments 2 and 3, and finally wires are led out through an upward-leading crystallizer in the upward-leading cavity. The temperature of the melting channel in the melting and up-drawing process is controlled to be 1350-; examples 1 and 2 were open smelted, example 3 the lid 5 was opened while adding copper alloy feed, slag removal and covering agent.
Furnace body use evaluation:
1. detecting the oxygen content of the copper alloy: detecting by using an oxygen-nitrogen-hydrogen content analyzer;
2. slag yield in the production process of the copper alloy: slag yield (%) = slag amount/alloy raw material input amount 100%;
| oxygen content/ppm of copper alloy | Slag rate (%) | |
| Example 1 | 17 | 11.2 |
| Example 2 | 14 | 10.9 |
| Example 3 | 11 | 4.5 |
As can be seen from the table, no frozen copper phenomenon occurs in the production process of the embodiments 1 and 2, the slag yield of the embodiments 1 and 2 is higher than that of the embodiment 3, wherein the slag yield of the transition cavity of the embodiment 1 is slightly higher than that of the embodiment 2, and the slag yield of the upward-leading cavity of the embodiment 1 is slightly lower than that of the embodiment 2, because the circulation of molten liquid in the cavity is intensified by the circulation molten channel in the cavity of the transition cavity, impurities are enabled to float upwards in the transition cavity sufficiently, and the slag yield in the upward-leading cavity is reduced. Example 3 added inert gas shielding and the copper alloy contained less oxygen than examples 1 and 2.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. An improved multi-element copper alloy up-drawing furnace, comprising:
the inner cavity of the open molten pool comprises a smelting cavity, a transition cavity and an upward leading cavity, wherein the bottom of the smelting cavity is communicated with the bottom of the transition cavity;
the smelting furnace is characterized in that inner cavity circulating melting channels are arranged at the bottoms of the smelting cavity, the transition cavity and the upward leading cavity, and/or inter-cavity melting channels are communicated between the transition cavity and the smelting cavity and between the transition cavity and the upward leading cavity.
2. The improved multi-element copper alloy up-drawing furnace as claimed in claim 1, wherein the intra-cavity circulating melting channel is respectively arranged at the bottom of the melting cavity, the transition cavity and the up-drawing cavity, and communication ports are respectively arranged on the partition plates between the melting cavity and the transition cavity and between the transition cavity and the up-drawing cavity.
3. The improved multi-element copper alloy up-draw furnace of claim 1, wherein the molten bath is a graphite molten bath.
4. The improved multi-element copper alloy drawing furnace of claim 2, wherein the melting pool and the baffle are integrally connected, and the melting pool and the baffle are both made of graphite.
5. The improved multi-element copper alloy drawing furnace according to claim 1, wherein the molten pool is provided with a furnace cover, an inert gas pipe is arranged in an opening of the molten pool, or an inert gas pipe is arranged between the furnace cover and the opening of the molten pool; the inert gas pipe is communicated with a gas source and is provided with a vent hole corresponding to at least one of the smelting cavity, the transition cavity and the upward leading cavity.
6. The improved multi-element copper alloy up-drawing furnace of claim 5, wherein the inert gas pipe is arranged around the open surrounding of the molten pool or is arranged up and down correspondingly to the open inner edge of the molten pool; the exhaust holes are arranged towards the centers of preset liquid levels of the smelting cavity, the transition cavity and the upward leading cavity.
7. The improved multi-element copper alloy upward drawing furnace according to claim 5, wherein the inert gas pipe comprises a preheating section and an exhaust section which are communicated, and the exhaust hole is arranged in the exhaust section.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121677682.1U CN214768788U (en) | 2021-07-22 | 2021-07-22 | Improved multi-element copper alloy up-drawing furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121677682.1U CN214768788U (en) | 2021-07-22 | 2021-07-22 | Improved multi-element copper alloy up-drawing furnace |
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| CN214768788U true CN214768788U (en) | 2021-11-19 |
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| CN202121677682.1U Active CN214768788U (en) | 2021-07-22 | 2021-07-22 | Improved multi-element copper alloy up-drawing furnace |
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