Pure copper fire refining device
By combining an oxidation refining furnace and a reduction refining furnace, the problems of low copper liquid grade and low production efficiency in existing technologies have been solved, enabling the direct production of high-grade copper, improving production efficiency and reducing energy consumption.
Patent Information
- Application Number
- CN202520132133.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-20
AI Technical Summary
In existing technologies, crude copper refining processes are difficult to effectively improve the grade of copper liquid and have low production efficiency. In particular, when processing low-grade scrap copper or cold crude copper, further wet electrolytic treatment is required to obtain pure copper.
A combination of an oxidation refining furnace and a reduction refining furnace is used. Through preheating in the oxidation refining furnace, heating in the material processing zone, and oxidation and impurity removal in the oxidation refining zone, combined with oxidation treatment by top-blown spray guns, impurities in the copper liquid are separated. Subsequently, reduction treatment is carried out in the reduction refining furnace to achieve the direct production of high-grade copper.
It improves the grade of molten copper, reduces electrolytic refining steps, increases production efficiency, reduces energy consumption and environmental pollution, and adapts to production needs of different scales.
Smart Images
Figure CN223723182U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to crude copper refining technical field especially relates to a pure copper fire refining device. BACKGROUND
[0002] At present, the main refining process adopted by waste copper or cold crude copper refining plant is that smelting, oxidation, reduction and casting of the copper are completed in one furnace, and the output copper anode contains less than 99.5% of copper, which is cast into anode plate and further treated by wet electrolysis to produce pure copper.
[0003] There are also domestic vertical furnace to treat high-grade copper or residual pole, and the molten copper liquid enters the holding furnace for heat preservation after melting, and then the copper rod processing and manufacturing can be directly carried out. However, the process does not have the function of removing impurities, and can only treat high-grade copper or electrolytic residual pole, and the output copper liquid has the same grade as the raw material. SUMMARY
[0004] The utility model discloses at least one of the technical problems in the related art is solved to some extent. Therefore, the embodiment of the utility model provides a pure copper fire refining device, which has the advantages of improving the grade of copper liquid and high production efficiency.
[0005] According to the pure copper fire refining device provided by the embodiment of the utility model, the pure copper fire refining device comprises an oxidation refining furnace and a reduction refining furnace, the oxidation refining furnace comprises a feeding area, a preheating area, a melting area and an oxidation refining area which are sequentially connected with each other from top to bottom, the feeding area is arranged with a feeding port for feeding copper materials, the preheating area is used for preheating the copper materials, the melting area is used for heating the copper materials into copper liquid, the melting area and the oxidation refining area are connected through a pipeline, the pipeline is used for conveying the copper liquid, the oxidation refining area is arranged with a copper outlet, a slag outlet and a top blowing lance, the copper outlet is used for discharging the copper liquid, the slag outlet is used for discharging slag, and the top blowing lance is used for feeding oxygen-containing gas into the oxidation refining area, and the reduction refining furnace is connected with the copper outlet and used for reducing the copper liquid.
[0006] The pure copper fire refining device provided by the embodiment of the utility model has the advantages of improving the grade of copper liquid and high production efficiency. The application has the following advantages: the oxidation refining furnace is used to complete the melting and oxidation of the copper materials, the oxidation effect can be adjusted by controlling the top blowing lance, and the oxidation refining furnace and the reduction refining furnace can be used to produce high-grade copper without further electrolytic refining.
[0007] In some embodiments, the pure copper fire refining device further comprises a flue, two ends of the flue are connected with the oxidation refining area and the melting area respectively, and the flue is used for conveying the flue gas in the oxidation refining area into the melting area.
[0008] In some embodiments, a flux feeding port is arranged at the top of the oxidation refining zone for feeding flux.
[0009] In some embodiments, the copper tapping port is arranged at the bottom of the oxidation refining zone at the end away from the material melting zone, and the height of the slag tapping port is higher than that of the copper tapping port.
[0010] In some embodiments, an emergency flue gas port is arranged at the top of the material melting zone.
[0011] In some embodiments, the reduction refining furnace can be a rotary anode furnace, a fixed anode furnace, or a tilting furnace.
[0012] In some embodiments, a burner is arranged at the top of the material melting zone, and a burner is arranged at the end of the oxidation refining zone away from the material melting zone.
[0013] In some embodiments, one or more layers of the burners are arranged below the material melting zone, and the number of the burners in each layer is at least one.
[0014] In some embodiments, the top blowing lance is at least one.
[0015] In some embodiments, the copper fire refining device further comprises an insulation layer arranged in the preheating zone, the material melting zone, and the oxidation refining zone to reduce heat loss. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 FIG. 1 is a structural schematic diagram of a copper fire refining device according to an embodiment of the present application.
[0017] Reference signs: 1, material melting zone; 2, preheating zone; 3, material feeding zone; 4, oxidation refining zone; 5, material feeding port; 6, flue gas outlet; 7, emergency flue gas port; 8, flux feeding port; 9, top blowing lance; 10, slag tapping port; 11, copper tapping port; 12, burner; 13, flue; 14, reduction refining furnace. DETAILED DESCRIPTION
[0018] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.
[0019] According to the copper fire refining device, the waste copper and the cold copper are preheated through the preheating area 2, the copper material in the material melting area 1 is melted to form copper liquid, and the oxidation refining of the copper liquid is completed in the oxidation refining area 4, so that the smelting and oxidation process and the reduction and casting process are separated, the reduction and casting are performed by the reduction refining furnace 14, and the copper content of the copper liquid can be improved by realizing the impurity removal of the copper liquid by the oxidation refining furnace. The shell of the oxidation refining furnace is built by refractory bricks.
[0020] The copper fire refining device has the advantages of improving the grade of the copper liquid and high production efficiency.
[0021] In some embodiments, the copper fire refining device further comprises a flue 13, two ends of the flue 13 are communicated with the oxidation refining area 4 and the material melting area 1 respectively, and the flue 13 is used for conveying the flue gas of the oxidation refining area 4 into the material melting area 1.
[0022] Specifically, the design of the flue 13 can realize the recycling of the flue gas, reduce the heat loss, improve the thermal efficiency, reduce the energy consumption, and reduce the environmental pollution. Optionally, the flue gas of the oxidation refining area 4 can also be treated separately, and the flue gas entering the material melting area 1 is reduced.
[0023] Optionally, a guide plate is arranged in the flue 13, the guide plate is used to effectively guide the flow direction of the flue gas, reduce the vortex and backflow phenomenon, further reduce the flow resistance of the flue gas, improve the stability and uniformity of the flue gas conveying, and the shape, position and number of the guide plate can be arranged according to the specific size of the flue and the flow characteristics of the flue gas. The guide plate is arranged at the inlet and outlet of the flue 13, the guide plate can adopt a straight plate and a bent plate, the guide plate can be fixed on the inner wall of the flue by welding, bolt connection and the like, so as to ensure the stability and reliability of the guide plate.
[0024] In some embodiments, a flux feeding port 8 is arranged at the top of the oxidation refining area 4 to feed the flux.
[0025] Specifically, the flux feeding port 8 is arranged in the oxidation refining area 4 to facilitate the control of the flux addition amount, improve the impurity removal efficiency in the copper liquid, and improve the purity of the copper.
[0026] Optionally, multiple flux feeding ports 8 can be arranged at different positions of the oxidation refining zone 4. According to the distribution of impurities in the copper liquid and the reaction rate, the flux is added in stages and in different areas to make the flux fully contact with the copper liquid, thereby improving the impurity removal efficiency.
[0027] In some embodiments, the copper tapping port 11 is arranged at the bottom of the end of the oxidation refining zone 4 away from the material converting zone 1, and the height of the slag tapping port 10 is higher than that of the copper tapping port 11.
[0028] Specifically, the height of the slag tapping port 10 is higher than that of the copper tapping port 11, which is beneficial to the separation of the copper liquid and the oxidation slag, reduces the loss of the copper liquid, improves the recovery rate of copper, and reduces the production cost.
[0029] In some embodiments, the emergency flue gas port 7 is arranged at the top of the feeding zone 3.
[0030] Specifically, the emergency flue gas port 7 can quickly discharge harmful gases in emergency situations, ensuring production safety, improving the safety of the production process, and reducing the risk of accidents. It can avoid the difficulty of discharging a large amount of flue gas generated in the oxidation refining zone 4, and reduce the pressure in the oxidation refining furnace to ensure the safe operation of the equipment.
[0031] In some embodiments, the reduction refining furnace 14 can be a rotary anode furnace, a fixed anode furnace, or a tilting furnace.
[0032] Specifically, the selection of multiple reduction refining furnaces 14 can adapt to different production needs, improve the flexibility of the device, and meet the production requirements of different scales and refining. The reduction refining furnace 14 is connected to the copper tapping port 11 of the oxidation refining zone 4 through a flow channel. The rotary anode furnace has the advantages of high production efficiency, smooth process, and easy operation, and is suitable for large-scale production. The furnace body can rotate 360°, and the tuyere is buried under the liquid surface by rotating the furnace body to perform reduction operation. The rotary anode furnace can also use the air brick technology to perform nitrogen bottom blowing, which greatly shortens the reduction time and improves the quality of the copper liquid. The fixed anode furnace has a relatively simple structure and is suitable for small and medium-scale production. The furnace body is fixed and does not move, and the reduction operation is realized by adjusting the position of the tuyere. The tilting furnace combines the advantages of the reverberatory furnace and the rotary furnace, and the hearth has a large heat exchange area. At the same time, the tilting furnace adopts the rotary mode of the rotary furnace. The tilting furnace can handle hot materials and cold materials, and has strong adaptability.
[0033] In some embodiments, heat insulation materials are arranged outside the flow channel to reduce heat loss. The heat insulation materials can be materials such as aluminum silicate fiber and asbestos to reduce heat loss and maintain the high-temperature state of the copper liquid, which is beneficial to the subsequent reduction reaction.
[0034] In some embodiments, a burner 12 is arranged on the material converting zone 1, and the burner 12 is arranged at the end of the oxidation refining zone 4 away from the material converting zone 1.
[0035] Specifically, the arrangement of the burners 12 in the melting area 1 and the oxidation refining area 4 can realize efficient heating and melting of the copper material. The melting speed of the copper material is improved, and the production cycle is shortened. The fuel burned by the burners 12 can be natural gas, heavy oil, diesel, and the combustion air can be compressed air, oxygen-enriched air, or pure oxygen.
[0036] In some embodiments, one or more layers of burners 12 are arranged below the melting area 1, and the number of burners 12 in each layer is at least one.
[0037] Specifically, the multi-layer burner 12 design can better control the heating temperature and flame distribution, improve the thermal efficiency, reduce energy consumption, and improve the melting quality of the copper material. The multi-layer burner 12 distribution can make the copper material fully heated.
[0038] Optionally, the burners in the furnace wall of the melting area 1 form a ring-shaped or spiral-shaped combustion area, which makes the copper material heated more evenly and improves the melting efficiency. The burners in each layer are arranged in a ring-shaped combustion area, and the number of burners in each layer is the same. The burners can be arranged in the middle of the furnace wall, and the spacing between the burners is selected according to the actual environment.
[0039] The spiral-shaped combustion area adopts burners with a spiral flow structure, which makes the combustion medium spray out in the form of spiral flow. The burners can be arranged along the spiral trajectory inside the furnace body, and the distance between adjacent burners should be determined according to the rotation direction and length of the flame to ensure that the flame can continuously cover the entire spiral area. The spray direction of the burner should be consistent with the rotation direction of the spiral-shaped partition to enhance the rotating flow effect.
[0040] In some embodiments, the top blowing lance 9 has at least one.
[0041] Specifically, the top blowing lance 9 is used to send compressed air or oxygen-enriched air into the oxidation refining area 4 for oxidation and slag removal. Increasing the number of top blowing lances 9 can improve the oxidation refining efficiency and ensure that the impurities in the copper liquid are effectively removed. Optionally, the position of the top blowing lance 9 can be adjusted according to the liquid level in the oxidation refining area 4 to ensure the gas sending effect. The lance can be adjusted up and down according to the liquid level in the oxidation refining area 4 to ensure that the nozzle of the lance is always located at the appropriate position on the surface of the copper liquid. The adjustment method can be manual or automatic. Automatic adjustment can be achieved by detecting the liquid level with a sensor and then driving the lance lifting mechanism to adjust. The lance lifting mechanism can be a linear drive device such as an electric push rod or a pneumatic cylinder. Optionally, it also includes an angle adjustment mechanism, which allows the lance to adjust its spray angle as needed to change the spray direction and range of the gas in the molten pool. The angle adjustment mechanism can be a rotating member connected to the lance to drive the rotation of the lance.
[0042] It can be understood that multiple spray guns can be arranged at a certain interval and arrangement to achieve uniform oxidation treatment of different areas in the molten pool. The spray guns can be arranged in a ring shape, the distance between each spray gun is equal, forming a complete ring, which can make the oxidizing gas uniformly cover the entire surface of the molten pool, promote the full contact of the copper liquid with the oxidizing gas, and improve the efficiency of oxidation and slag removal. At the same time, the ring arrangement is also conducive to forming a stable gas flow circulation on the surface of the molten pool. The spray guns can be arranged in a rectangular array, which is suitable for rectangular molten pools of different sizes. In addition, the rectangular arrangement helps to achieve uniform oxidation treatment in each area of the molten pool. The spray guns can be arranged in a spiral trajectory, gradually expanding from the center of the molten pool, forming a spiral arrangement pattern. The spiral arrangement can make the oxidizing gas gradually spread from the center to the periphery of the molten pool, forming an oxidation treatment path from the inside to the outside, which helps the impurities in the copper liquid to migrate and remove from the center to the edge.
[0043] In some embodiments, a heat preservation layer is further included, which is arranged in the preheating zone 2, the melting zone 1 and the oxidation refining zone 4 to reduce heat loss. The material of the heat preservation layer can be aluminum silicate fiber, asbestos, polyurethane foam plastic, etc. to reduce the heat loss of the furnace body of the oxidation refining furnace, and the material of the heat preservation layer is attached to the refractory bricks of the furnace body. Rock wool, polyurethane foam plastic, expanded perlite, etc. can also be used as the heat preservation layer. Rock wool has good high temperature resistance and heat insulation effect, and is suitable for high temperature furnace body; polyurethane foam plastic has high closed cell rate, excellent heat insulation and heat preservation performance, and good flexibility and adhesion, which can be closely attached to the furnace body; expanded perlite has a porous structure, light weight, good heat insulation performance and high chemical stability.
[0044] In some embodiments, a reflective layer can be provided adjacent to one side of the preheating zone 2, the melting zone 1 and the oxidation refining zone 4 to reduce heat radiation loss. The reflective layer can be glass fiber with aluminum film, metal foil such as aluminum foil, stainless steel foil, nickel foil, etc. The reflective layer needs to withstand high temperature in the working environment and has good chemical stability without reacting with the heat preservation material of the heat preservation layer. Stainless steel foil has high reflectivity and good high temperature resistance, and can be used for a long time in a high temperature environment; nickel foil not only has high reflectivity, but also has excellent oxidation resistance and corrosion resistance, and is suitable for use in high temperature oxidation environment such as oxidation refining furnace.
[0045] Optionally, the reflective layer is designed as a detachable module, which is convenient for installation and replacement of damaged reflective layer. For example, the reflective layer is divided into multiple small reflective blocks, each of which is fixed on the heat preservation layer by buckle or screw, when a certain reflective block is damaged or needs to be replaced, only the part needs to be disassembled and replaced, without the need to replace the whole reflective layer. The edges of the reflective blocks are provided with serrated protrusions for cooperation with adjacent reflective blocks, and the reflective blocks are engaged with each other through the serrated protrusions to realize the splicing between the reflective blocks, which can realize the quick installation of the reflective blocks.
[0046] In some embodiments, a first baffle plate is arranged at the copper outlet, the first baffle plate is arranged in the oxidation refining zone 4 to change the size of the copper outlet, a through hole is arranged on the first baffle plate, and as the first baffle plate moves in the oxidation refining zone 4, the through hole is partially overlapped with the copper outlet to change the size of the copper outlet, so that the copper outlet is accurately controlled. The first baffle plate can be arranged on the first baffle plate, and the first baffle plate can be made of high-temperature-resistant and corrosion-resistant materials such as silicon carbide and alumina ceramics. These materials can maintain stable performance in a high-temperature environment, and have good chemical corrosion resistance, and can resist the erosion of oxides and other impurities in the copper liquid,
[0047] The first baffle plate is driven by electricity or gas, such as an electric push rod or a gas cylinder, and can be remotely controlled and automatically controlled. Optionally, a plurality of through holes can be arranged on the first baffle plate, each through hole has a different diameter, and the through holes are spaced apart by a certain distance. The through holes are aligned with the copper outlet to control and adjust the flow of the copper liquid flowing out of the copper outlet, thereby meeting different production requirements. Optionally, a temperature sensor is arranged at the copper outlet to monitor the temperature of the copper liquid in real time, thereby ensuring the stability of the copper outlet process.
[0048] Optionally, the surface of the first baffle plate is provided with a conical, arc-shaped or wavy protrusion. The protrusion can better guide the flow of the copper liquid, reduce the impact force of the copper liquid on the first baffle plate, and prolong the service life of the baffle plate. The protrusion can also disturb the copper liquid to help the copper liquid flow more uniformly. Optionally, the surface of the first baffle plate is coated with a layer of high-temperature-resistant and corrosion-resistant coating, such as silicon nitride and boron carbide. The coating can further improve the high-temperature resistance and chemical corrosion resistance of the first baffle plate, prolong the service life of the first baffle plate, and also reduce the adhesion of residues on the surface of the first baffle plate.
[0049] The vibration mechanism is used to drive the oxidation refining zone 4 to vibrate, increase the flow of the copper liquid, separate the oxidation slag from the copper liquid, and concentrate the oxidation slag on the upper layer of the copper liquid. The vibration mechanism can adopt electromagnetic vibration or mechanical vibration mode, and the vibration frequency and amplitude can be adjusted according to actual production requirements. The vibration mechanism can include a hammering electromagnetic vibrator, the vibrator can be arranged below the oxidation refining zone 4, the hammer head is driven to hammer the outer wall of the furnace body after the excitation coil is energized, and the hammer head is reset under the action of gravity after the excitation coil is de-energized. The vibration impact on the copper liquid in the furnace body caused by hammering can promote the separation of the copper liquid from the oxidation slag, or the vibration mechanism adopts a mechanical vibration device such as an eccentric vibrator, and the eccentric block rotates under the drive of the motor to drive the furnace body to vibrate, thereby driving the copper liquid in the furnace body to vibrate.
[0050] According to the pure copper fire refining process, the pure copper fire refining process comprises the following steps:
[0051] The copper material is put into the feeding port 5 of the feeding area 3 of the copper oxide refining furnace, and the copper material is preheated by the flue gas from the copper oxide refining area 4 and the material melting area 1 after falling into the preheating area 2, and the copper liquid after melting of the copper material in the material melting area 1 flows into the copper oxide refining area 4;
[0052] The top blowing lance 9 blows the oxygen-containing gas into the copper oxide refining area 4 to oxidize and slag, the flux feeding port 8 puts the flux into the copper oxide refining area 4 to form the oxidation slag with the impurity elements in the copper liquid, the oxidation slag is discharged through the slag discharge port 10, and the copper liquid enters the reduction refining furnace 14 through the copper discharge port 11 to be reduced and processed.
[0053] The technical advantages of the pure copper fire refining device according to the embodiment of the utility model are the same as those of the pure copper fire refining device described above, and details are not repeated here.
[0054] Embodiment 1:
[0055] The waste copper scrap is treated, the copper content is 90%, and the treatment capacity is 20t / h. The burner 11 of the copper oxide refining furnace is arranged in three layers, a total of 12, the fuel used is natural gas, the oxygen concentration of the combustion-supporting wind is 45%, the top blowing lance 8 is provided with three, each blows in 500-2000Nm 3 / h of compressed air, the burner 11 uses pure oxygen to burn natural gas to supplement heat, the output copper liquid contains 0.5-0.8% of oxygen and 99.2-99.4% of copper.
[0056] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.
[0057] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0058] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be direct connection, also can indirectly connect through intermediate medium, can be the communication of two element internals or the interaction relationship of two elements, unless another definite limitation. For ordinary skilled in the art, the above terms can be understood according to the specific meaning of the utility model in specific circumstances.
[0059] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly contacted through intermediate medium. Moreover, the first feature "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than that of the second feature.
[0060] In the utility model, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.
[0061] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the changes, modifications, replacements and variations of the above embodiments made by the ordinary skilled in the art are within the protection scope of the utility model.
Claims
1. A pure copper pyrometallurgical refining apparatus, characterized in that, The application relates to a copper refining system comprising: an oxidizing refining furnace, which comprises a feeding zone, a preheating zone, a melting zone and an oxidizing refining zone in sequence from top to bottom, the feeding zone is arranged with a feeding port for feeding copper materials, the preheating zone is used for preheating the copper materials, the melting zone is used for heating the copper materials into copper liquid, the melting zone is connected with the oxidizing refining zone through a pipeline for conveying the copper liquid, the oxidizing refining zone is arranged with a copper outlet, a slag outlet and a top blowing lance, the copper outlet is used for discharging the copper liquid, the slag outlet is used for discharging slag, and the top blowing lance is used for feeding oxygen-containing gas into the oxidizing refining zone; a reducing refining furnace connected with the copper outlet for reducing treatment of the copper liquid.
2. The pure copper fire refining apparatus according to claim 1, characterized by a flue connected with the oxidizing refining zone and the melting zone at two ends respectively, and used for conveying flue gas of the oxidizing refining zone into the melting zone.
3. The pure copper fire refining apparatus according to claim 1, characterized by a flux feeding port arranged at the top of the oxidizing refining zone for feeding flux.
4. The pure copper refining apparatus by pyroprocess according to claim 1, wherein The copper outlet is arranged at the bottom of the oxidizing refining zone far from the melting zone, and the height of the slag outlet is higher than that of the copper outlet.
5. The pure copper fire refining apparatus according to claim 1, wherein An accident flue gas port is arranged at the top of the feeding zone.
6. The pure copper fire refining apparatus according to claim 1, wherein The reducing refining furnace is a rotary anode furnace, a fixed anode furnace or a tilting furnace.
7. The pure copper fire refining apparatus according to claim 1, wherein Burners are arranged above the melting zone, and burners are arranged at the end of the oxidizing refining zone far from the melting zone.
8. The pure copper fire refining apparatus according to claim 7, wherein One or more layers of the burners are arranged below the melting zone, and the number of burners in each layer is at least one.
9. The pure copper fire refining apparatus according to claim 8, characterized by The top blowing lance has at least one.
10. The pure copper fire refining apparatus according to claim 1, characterized by An insulation layer is arranged in the preheating zone, the melting zone and the oxidizing refining zone for reducing heat loss.