CN111304458A - High accuracy red copper contact pin production is with deoxidization smelting unit - Google Patents
High accuracy red copper contact pin production is with deoxidization smelting unit Download PDFInfo
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- CN111304458A CN111304458A CN202010231219.8A CN202010231219A CN111304458A CN 111304458 A CN111304458 A CN 111304458A CN 202010231219 A CN202010231219 A CN 202010231219A CN 111304458 A CN111304458 A CN 111304458A
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Abstract
The invention discloses a deoxidation smelting device for producing a high-precision red copper contact pin, which comprises a smelting furnace, wherein a raw material input port is arranged at the top end of the smelting furnace and is used for inputting a copper raw material into the smelting furnace, the copper raw material is smelted at high temperature by the smelting furnace, the smelted liquid copper can flow to a holding furnace through a launder for subsequent processing treatment, a copper liquid outlet is arranged at the lower end of the holding furnace and is used for discharging, a nitrogen gas inlet is arranged at the upper end of one side of the smelting furnace, a nitrogen gas outlet is arranged at the lower end of the other side of the smelting furnace opposite to the nitrogen gas inlet, a gas pump continuously pumps nitrogen gas into the smelting furnace through the nitrogen gas inlet and discharges the nitrogen gas through the nitrogen gas outlet, so that heavier air or oxygen gas is favorably taken out from the nitrogen gas outlet to form a high-purity nitrogen atmosphere above the, so as to be beneficial to effectively reducing the air brought in when feeding, thereby realizing the functions of continuously and stably deoxidizing and having better deoxidizing effect.
Description
Technical Field
The invention relates to the technical field of metal copper casting, in particular to a deoxidation smelting device for producing a high-precision red copper contact pin.
Background
The electric conductivity of pure copper is second to silver, but the price is far lower than silver, so that the pure copper is widely used as a conductive material in the fields of electricians, electronics and the like after smelting, casting and processing, but the copper is easily combined with oxygen at high temperature to form copper oxide or cuprous oxide, and the copper is distributed at grain boundaries after solidification and crystallization, so that the electric conductivity of the copper is reduced due to the increase of the oxygen content in the copper, while the oxygen content in the copper material produced by adopting the conventional smelting and casting equipment is higher, so that the requirement of high conductivity and high fidelity on the market cannot be met, particularly, the requirement of higher oxygen content often exists for a high-precision red copper contact pin, in the prior art, the production method for the high-conductivity oxygen-free copper mainly adopts vacuum smelting and casting, wherein the vacuum smelting furnace and the casting equipment are arranged in a closed steel shell, then the vacuum is pumped, so that the smelting and the casting of the copper are carried out in a vacuum state to achieve the, however, the method has relatively complex equipment, inconvenient operation, low yield and high production cost, is not suitable for continuous mass large-scale production, and particularly, the oxygen content of the produced pure copper is not easy to keep continuous and stable under the influence of the equipment, so that the continuous and stable deoxidation effect cannot be achieved.
Disclosure of Invention
In view of this, the present invention aims to design a deoxidation smelting device for producing a high-precision red copper contact pin, so as to optimize and improve conventional smelting equipment, so as to achieve effects of continuously and stably removing oxygen and having a good oxygen removal effect.
Based on the above purpose, the invention designs a deoxidation smelting device for producing a high-precision red copper contact pin, which comprises:
a smelting furnace, wherein the top end of the smelting furnace is provided with a raw material feeding port;
the heat preservation furnace is arranged on one side of the smelting furnace, and a launder is communicated between the bottom of the heat preservation furnace and the bottom of the smelting furnace;
the electric induction heater is used for heating the smelting furnace and the holding furnace;
the nitrogen inlet is arranged at the upper end of one side of the smelting furnace;
the nitrogen gas outlet is arranged at the lower end of the other side of the smelting furnace opposite to the nitrogen gas inlet;
the air pump is communicated with the nitrogen inlet and is used for continuously introducing nitrogen into the smelting furnace and discharging the nitrogen through the nitrogen outlet;
and the copper liquid outlet is arranged at the lower end of the holding furnace and used for discharging.
Preferably, a deoxidizing cavity is arranged on one side of the smelting furnace, deoxidizing agents are filled in the deoxidizing cavity, nitrogen pipelines are connected to two sides of the deoxidizing cavity and are respectively communicated with the nitrogen gas outlet and the air pump through the nitrogen pipelines, so that the gas outlet of the nitrogen gas outlet can be deoxidized through the deoxidizing agents, and the deoxidizing agents can circularly flow into the deoxidizing cavity through the air pump and the nitrogen gas inlet.
Preferably, a plurality of air blowing holes are formed in the bottom end of the holding furnace, an induced draft fan is arranged on the outer side of the holding furnace and communicated with the air blowing holes and used for introducing carbon monoxide gas into the holding furnace, a ventilation opening is formed in the upper end of the holding furnace, and a check valve is arranged at the ventilation opening and used for exhausting gas outwards in a one-way mode.
Preferably, a replacement cavity is arranged above the heat preservation furnace, carbon blocks are filled in the replacement cavity, and two sides of the replacement cavity are respectively communicated with the ventilation port and the draught fan, so that air outlet of the ventilation port can be reacted and replaced with the carbon blocks through the replacement cavity, and circularly flows into the heat preservation furnace through the draught fan and the air blowing holes.
Preferably, the nitrogen pipeline close to the nitrogen gas outlet is attached and fixed on the outer wall of the displacement cavity so as to provide heat required by the displacement reaction.
Preferably, the nitrogen pipeline close to the nitrogen gas outlet is in a spiral shape so as to be wound on the outer wall of the displacement cavity.
Preferably, the outer side wall of the nitrogen pipeline except the part which is attached to the outer wall of the replacement cavity is provided with a heat insulation layer.
Preferably, a ceramic filter plate is fixedly arranged at the flow groove and used for filtering impurities.
Preferably, a shutoff valve is arranged at the copper liquid outlet for controlling the on-off, and the copper liquid outlet is designed to be inclined downwards.
Preferably, a flow rate meter and an oxygen detection meter are arranged at the nitrogen inlet.
From the above, the deoxidation smelting device for producing the high-precision red copper contact pin is provided with the smelting furnace, the smelting furnace is provided with the raw material input port at the top end for inputting the copper raw material into the smelting furnace through the raw material input port, the holding furnace is arranged at one side of the smelting furnace, the bottom of the holding furnace is communicated with the bottom of the smelting furnace through the launder, so that the copper raw material is smelted at high temperature by the smelting furnace, the smelted liquid copper can flow to the holding furnace through the launder for subsequent processing, the copper liquid outlet is arranged at the lower end of the holding furnace for discharging, the electric induction heater is arranged for providing a heat source for processing the smelting furnace and the holding furnace, the upper end of one side of the smelting furnace is provided with the nitrogen gas inlet, the lower end of the other side of the smelting furnace opposite to the nitrogen gas inlet is provided with the nitrogen gas outlet, the device is used for continuously pumping nitrogen into the smelting furnace and discharging the nitrogen through the nitrogen outlet, because the density of pure nitrogen is lower than that of air or oxygen, and the nitrogen outlet is arranged at the lower end of the other side of the smelting furnace opposite to the nitrogen inlet, therefore, the nitrogen is discharged from the nitrogen outlet, which is beneficial to taking heavier air or oxygen out of the nitrogen outlet, so that a high-purity nitrogen atmosphere is formed above copper liquid in the smelting furnace, so as to avoid the contact reaction of the oxygen and the copper liquid to generate attached copper oxide or cuprous oxide, thereby achieving the continuous and stable oxygen removal effect, on the other hand, when the copper raw material is put into the smelting furnace from a raw material inlet, partial air can not be brought in, and simultaneously, the oxygen enters one of the main modes of the smelting furnace, and because the upper end of the smelting furnace continuously blows in the nitrogen through the nitrogen inlet, and because the nitrogen is lighter, meanwhile, the air flow pumped by the air pump is large, so that positive pressure is formed at the position of a raw material inlet, the air introduction during feeding is reduced effectively, the optimization and improvement on conventional smelting equipment are realized, the effects of continuous and stable deoxidization and good deoxidization effect are achieved, the copper material with higher purity is produced, and compared with vacuum smelting and casting, the equipment is relatively simple, the operation is convenient and fast, the requirements on equipment maintenance and precision are not high, therefore, the production cost is low, the deoxidization effect is easy to continuously and stably output, and the continuous batch large-scale production is formed.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of the embodiment of the present invention at B in FIG. 1;
FIG. 4 is a schematic structural diagram of a displacement chamber according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a nitrogen gas pipeline according to an embodiment of the present invention;
fig. 6 is a plan view of the melting furnace and holding furnace of the embodiment of the present invention.
In the figure: the device comprises a smelting furnace 1, a raw material input port 2, a holding furnace 3, a gas blowing hole 31, a gas permeable port 32, a one-way valve 321, a launder 4, a ceramic filter plate 41, an electric induction heater 5, a nitrogen gas inlet 6, a nitrogen gas outlet 7, an air pump 8, a copper liquid outlet 9, a deoxidation chamber 10, a deoxidizer 101, a nitrogen pipeline 102, a heat insulation layer 1021, an induced draft fan 11, a replacement chamber 12, a carbon block 121, a shutoff valve 13, a flow meter 14 and an oxygen detection meter 15.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
The utility model provides a device is smelted with deoxidization to production of high accuracy red copper contact pin, as shown in fig. 1 to 6, including smelting furnace 1, 1 top of smelting furnace is equipped with raw materials and throws into mouth 2, 1 one side of smelting furnace is equipped with heat preservation stove 3, the intercommunication is equipped with chute 4 between the bottom of heat preservation stove 3 and the bottom of smelting furnace 1, be provided with electric induction heater 5, be used for heating smelting furnace 1 and heat preservation stove 3, the upper end of 1 one side of smelting furnace is equipped with nitrogen gas air inlet 6, the lower extreme of the last opposite side of 6 nitrogen gas air inlet of smelting furnace 1 is equipped with nitrogen gas outlet 7, be provided with air pump 8, air pump 8 communicates in nitrogen gas air inlet 6, be used for continuously introducing nitrogen gas into smelting furnace 1, and discharge through nitrogen.
The invention is provided with a smelting furnace 1, the top end of the smelting furnace 1 is provided with a raw material input port 2 for inputting copper raw materials into the smelting furnace 1 through the raw material input port 2, one side of the smelting furnace 1 is provided with a holding furnace 3, the bottom of the holding furnace 3 is communicated with the bottom of the smelting furnace 1 through a launder 4, so that the copper raw materials are smelted at high temperature through the smelting furnace 1, the smelted liquid copper can flow to the holding furnace 3 through the launder 4 for subsequent processing treatment, the lower end of the holding furnace 3 is provided with a copper liquid outlet 9 for discharging, the electric induction heater 5 is arranged for providing a heat source for processing the smelting furnace 1 and the holding furnace 3, the upper end of one side of the smelting furnace 1 is provided with a nitrogen gas inlet 6, the lower end of the other side of the smelting furnace 1 opposite to the nitrogen gas inlet 6 is provided with a nitrogen, the device is used for continuously pumping nitrogen into the smelting furnace 1 and discharging the nitrogen through the nitrogen outlet 7, because the density of pure nitrogen is lower than that of air or oxygen, and the nitrogen outlet 7 is arranged at the lower end of the other side of the smelting furnace 1 opposite to the nitrogen inlet 6, the nitrogen is discharged from the nitrogen outlet 7, and the heavier air or oxygen is favorably taken out from the nitrogen outlet 7, so that a high-purity nitrogen atmosphere is formed above the copper liquid in the smelting furnace 1, the contact reaction between the oxygen and the copper liquid is avoided to generate the attached copper oxide or cuprous oxide, and the continuous and stable oxygen removal effect is achieved, on the other hand, when the copper raw material is put into the smelting furnace 1 from the raw material inlet 2, partial air cannot be brought in, meanwhile, the oxygen enters one of the main modes in the smelting furnace 1, and because the upper end of the smelting furnace 1 continuously blows in the nitrogen through the nitrogen inlet 6, and because nitrogen gas is lighter to easily float in the upper end, simultaneously because the air current of pumping into through air pump 8 is great, thereby do benefit to and throw into 2 departments at the raw materials and form the malleation, so as to do benefit to effectively reducing the bringing into of air when throwing the material, thereby realize the optimization improvement to conventional smelting equipment, so as to reach the effect that continuous stable deoxidization and deoxidization effect are better, so as to do benefit to the copper product of higher purity, and for vacuum melting casting, the equipment is simple relatively, the simple operation, the equipment maintenance and the not high precision requirement, therefore, the manufacturing cost is lower, simultaneously the deoxidization effect is easy to be steadily exported in succession, do benefit to the large-scale production of formation continuous batch.
In the embodiment of the invention, a deoxidizing cavity 10 is arranged at one side of a smelting furnace 1, a deoxidizing agent 101 is filled in the deoxidizing cavity 10, nitrogen pipelines 102 are connected to two sides of the deoxidizing cavity 10 and are respectively communicated with a nitrogen gas outlet 7 and an air pump 8 through the nitrogen pipelines 102, so that the air outlet of the nitrogen gas outlet 7 can be deoxidized through the deoxidizing agent 101 and circularly flows in through the air pump 8 and the nitrogen gas inlet 6, and the nitrogen gas flowing out of the nitrogen gas outlet 7 possibly contains part of air or oxygen, and the oxygen gas which is included can be removed through the deoxidizing agent 101, so that the cyclic utilization of the nitrogen gas is realized, and the production cost is further reduced while the deoxidization is facilitated.
In the embodiment of the invention, the bottom end of the holding furnace 3 is provided with a plurality of air blowing holes 31, so that air can be blown upwards from the bottom of the copper liquid in the holding furnace 3, the outer side of the holding furnace 3 is provided with an induced draft fan 11, the induced draft fan 11 is communicated with the air blowing holes 31 and can be used for introducing carbon monoxide gas into the holding furnace 3 through an external carbon monoxide air source, when the residual oxygen in the copper liquid is not removed through nitrogen, copper oxide or cuprous oxide is generated through reaction, the introduced carbon monoxide gas can continuously react and reduce the copper oxide or the cuprous oxide into pure copper, so that the deoxidization effect is further improved, the air blowing holes 31 are provided with a plurality of air blowing holes 31, the carbon monoxide gas flows upwards from bottom to top through the plurality of air blowing holes 31, so as to improve the contact reaction area with the copper liquid, the upper end of the holding furnace 3 is provided with an air vent 32, the air vent 32 is provided with a one-way valve 321, can be discharged from the ventilation port 32 through the check valve 321.
In the embodiment of the invention, a replacement cavity 12 is arranged above the holding furnace 3, a carbon block 121 is filled in the replacement cavity 12, two sides of the replacement cavity 12 are respectively communicated with the ventilation port 32 and the induced draft fan 11, so that the air discharged from the ventilation port 32 can be reacted and replaced with the carbon block 121 through the replacement cavity 12, and circularly flows into the holding furnace 3 through the induced draft fan 11 and the air blowing hole 31, and the gas flowing out through the ventilation port 32 contains carbon dioxide gas and residual carbon monoxide gas generated by the reaction, and the carbon dioxide gas can be reacted with the carbon block 121 at a high temperature and replaced into the carbon monoxide gas, so that the carbon monoxide gas is circularly utilized, oxygen removal is facilitated, and the production cost is further reduced.
In the embodiment of the invention, the nitrogen pipeline 102 close to the nitrogen outlet 7 is attached and fixed to the outer wall of the replacement cavity 12, and nitrogen in the high-temperature environment in the smelting furnace 1 is discharged from the nitrogen pipeline 102 of the nitrogen outlet 7, and the nitrogen pipeline 102 close to the nitrogen outlet 7 is attached to the outer wall of the replacement cavity 12, so that heat required by replacement reaction can be provided, and thus, the heat source power consumption outside the replacement cavity 12 can be saved, and the production cost can be further reduced.
In the embodiment of the present invention, the nitrogen gas pipe 102 near the nitrogen gas outlet 7 is spiral to wind around the outer wall of the displacement chamber 12, thereby further improving the heat transfer efficiency.
In the embodiment of the present invention, the outer side wall of the nitrogen pipe 102 except the portion attached to the outer wall of the displacement chamber 12 is provided with a heat insulation layer 1021, so that heat conduction can be provided and heat insulation can be performed.
In the embodiment of the invention, the ceramic filter plate 41 is fixedly arranged at the launder 4 for filtering, so that when the molten copper smelted by the smelting furnace 1 flows into the holding furnace 3, impurities can be prevented from being brought into the holding furnace 3.
In the embodiment of the invention, a shutoff valve 13 is arranged at the molten copper outlet 9 for controlling the on-off, and the molten copper outlet 9 is designed to be inclined downwards so as to facilitate discharging.
In the embodiment of the invention, the flow rate meter 14 and the oxygen detection meter 15 are arranged at the nitrogen inlet 6, and both the flow rate of the nitrogen pumped into the smelting furnace 1 and the purity of the pumped nitrogen influence the continuous deoxidization effect, so that the power of the air pump 8 can be adjusted in real time by monitoring the flow rate of the nitrogen circularly pumped through the flow rate meter 14, and the purity of the circularly pumped nitrogen is monitored through the oxygen detection meter 15, so that the deoxidant 101 in the deoxidization cavity 10 can be adjusted in real time, and the real-time monitoring and adjustment of the deoxidization device are facilitated.
In the deoxidation smelting device for producing the high-precision red copper contact pin, the smelting furnace 1 is arranged, the top end of the smelting furnace 1 is provided with the raw material feeding port 2, when in use, copper raw materials are fed into the smelting furnace 1 through the raw material feeding port 2, the copper raw materials are smelted at high temperature through the smelting furnace 1, the smelted liquid copper can flow to the holding furnace 3 through the launder 4 for subsequent processing treatment, the lower end of the holding furnace 3 is provided with the copper liquid outlet 9 for discharging, the upper end of one side of the smelting furnace 1 is provided with the nitrogen gas inlet 6, the lower end of the other side of the smelting furnace 1 opposite to the nitrogen gas inlet 6 is provided with the nitrogen gas outlet 7, the air pump 8 continuously pumps nitrogen gas into the smelting furnace 1 through the nitrogen gas inlet 6 and discharges the nitrogen gas through the nitrogen gas outlet 7, so that heavier air or oxygen can be conveniently taken out from the nitrogen gas outlet 7 to, meanwhile, the air flow pumped by the air pump 8 is beneficial to forming positive pressure at the raw material inlet 2, so as to be beneficial to effectively reducing the air brought in when feeding, thereby realizing the functions of continuously and stably removing oxygen and having better oxygen removing effect, in addition, one side of the smelting furnace 1 is provided with a deoxidizing cavity 10, the air outlet of the nitrogen gas outlet 7 can be removed by the deoxidizing agent 101 and circularly flows in through the air pump 8 and the nitrogen gas inlet 6, so that the mixed oxygen can be removed by the deoxidizing agent 101, thereby realizing the cyclic utilization of the nitrogen gas, the bottom end of the holding furnace 3 is provided with a plurality of air blowing holes 31, the induced draft fan 11 is communicated with the air blowing holes 31 and is used for introducing carbon monoxide gas into the holding furnace 3 so as to continuously react and reduce the copper oxide or cuprous oxide into pure copper, the carbon dioxide gas and the residual carbon monoxide gas generated by the reaction can be discharged outwards through the air vent 32 through the one-way valve, a replacement cavity 12 is arranged above the heat preservation furnace 3 to ensure that the air outlet of the air vent 32 can be reacted with the carbon block 121 to be replaced into carbon monoxide gas through the replacement cavity 12, and the carbon monoxide gas circularly flows into the heat preservation furnace 3 through the induced draft fan 11 and the air blowing hole 31 to realize the recycling of the carbon monoxide gas, a nitrogen pipeline 102 close to the nitrogen outlet 7 is spirally wound and attached on the outer wall of the replacement cavity 12 to provide heat required by the replacement reaction, the outer side wall of the nitrogen pipeline 102, which is attached on the outer wall part of the replacement cavity 12, is provided with a heat insulation layer 1021, thereby providing heat conduction and simultaneously playing the role of heat insulation, a ceramic filter plate 41 is fixedly arranged at the launder 4 for filtering, a shutoff valve 13 is arranged at the copper liquid outlet 9 for controlling the on-off, the copper liquid outlet 9 is designed to be inclined downwards so as to facilitate the discharging, a flow rate meter 14 and an oxygen detection meter 15 are arranged at the nitrogen, so as to be beneficial to monitoring and adjusting the oxygen removing device in real time.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a device is smelted with deoxidation to production of high accuracy red copper contact pin which characterized in that includes:
the top end of the smelting furnace is provided with a raw material feeding port;
the heat preservation furnace is arranged on one side of the smelting furnace, and a launder is communicated between the bottom of the heat preservation furnace and the bottom of the smelting furnace;
the electric induction heater is used for heating the smelting furnace and the holding furnace;
the nitrogen inlet is arranged at the upper end of one side of the smelting furnace;
the nitrogen gas outlet is arranged at the lower end of the other side of the smelting furnace, which is opposite to the nitrogen gas inlet;
the air pump is communicated with the nitrogen inlet and is used for continuously introducing nitrogen into the smelting furnace and discharging the nitrogen through the nitrogen outlet;
and the copper liquid outlet is arranged at the lower end of the holding furnace and used for discharging.
2. The deoxidation smelting device for the production of the high-precision red copper contact pin according to claim 1, wherein a deoxidation cavity is arranged on one side of the smelting furnace, a deoxidizer is filled in the deoxidation cavity, nitrogen pipelines are connected to two sides of the deoxidation cavity and are respectively communicated with the nitrogen gas outlet and the air pump through the nitrogen pipelines, so that the gas outlet of the nitrogen gas outlet can be deoxidized by the deoxidizer and circularly flows in from the air pump and the nitrogen gas inlet.
3. The deoxidation smelting device for the production of the high-precision red copper contact pin as claimed in claim 2, wherein a plurality of air blowing holes are formed in the bottom end of the holding furnace, an induced draft fan is arranged on the outer side of the holding furnace and communicated with the air blowing holes for introducing carbon monoxide gas into the holding furnace, an air vent is formed in the upper end of the holding furnace, and a one-way valve is arranged at the air vent for one-way outward exhaust.
4. The deoxidation smelting device for high-precision red copper insertion pin production according to claim 3, wherein a replacement cavity is arranged above the holding furnace, carbon blocks are filled in the replacement cavity, two sides of the replacement cavity are respectively communicated with the ventilation port and the induced draft fan, so that the air outlet of the ventilation port can be reacted and replaced with the carbon blocks in the replacement cavity, and the air outlet and the air blowing hole circularly flow into the holding furnace.
5. The deoxidation smelting device for the production of the high-precision red copper contact pin as claimed in claim 4, wherein the nitrogen pipeline close to the nitrogen outlet is attached and fixed to the outer wall of the displacement chamber so as to provide heat required by the displacement reaction.
6. The deoxidation smelting device for high-precision red copper insertion pin production according to claim 5, wherein the nitrogen gas pipeline near the nitrogen gas outlet is spiral to wind around the outer wall of the displacement chamber.
7. The deoxidation smelting device for the production of the high-precision red copper contact pin as claimed in claim 4, wherein the outside wall of the nitrogen pipeline except the part attached to the outer wall of the displacement chamber is provided with a heat insulation layer.
8. The deoxidation smelting device for producing high-precision red copper pins as claimed in claim 1, wherein a ceramic filter plate is fixed at the launder for filtering impurities.
9. The deoxidation smelting device for the production of the high-precision red copper inserting needle as claimed in claim 1, wherein a shutoff valve is arranged at the copper liquid outlet for controlling the on-off, and the copper liquid outlet is designed to be inclined downwards.
10. The deoxidation smelting device for the production of the high-precision red copper inserting needle as claimed in claim 1, wherein a flow rate meter and an oxygen detection meter are arranged at the nitrogen gas inlet.
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Application publication date: 20200619 |
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