Pure copper fire refining device and process

Abstract

The pure copper fire refining device comprises an oxidation refining furnace and a reduction refining furnace, the oxidation refining furnace sequentially comprises a feeding area, a preheating area, a material melting area and an oxidation refining area from top to bottom, and the feeding area is provided with a feeding port used for feeding copper materials; the preheating area is used for preheating the copper material, the material melting area is used for heating the copper material into copper liquid, the material melting area is communicated with the oxidation refining area through a pipeline, the pipeline is used for conveying the copper liquid, the oxidation refining area is provided with a copper discharging port, a slag discharging port and a top blowing spray gun, the copper discharging port is used for discharging the copper liquid, and the slag discharging port is used for discharging the slag discharging port. And the slag discharging opening is used for discharging slag, the top blowing spray gun is used for feeding oxygen-containing gas into the oxidation refining area, and the reduction refining furnace is communicated with the copper discharging opening so as to carry out reduction treatment on the molten copper. The pure copper fire refining device provided by the invention has the advantages that the grade of copper liquid is improved, and the production efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of crude copper refining, and in particular to a pure copper pyrometallurgical refining device and process. Background Art

[0002] At present, the main refining process adopted by scrap copper or cold copper refineries is that the smelting, oxidation, reduction and casting of scrap copper / cold copper are all completed in one furnace. The copper content of the produced anode copper is generally less than 99.5%. It is cast into anode plates and further treated by wet electrolysis to produce pure copper.

[0003] In China, vertical furnaces are also used to process high-grade scrap copper or residual electrodes. After melting, the molten copper enters a holding furnace for heat preservation, and then copper rods can be directly processed and made. However, this process does not have the function of removing impurities, and can only process high-grade scrap copper or electrolytic residual electrodes, and the output copper liquid is equivalent to the grade of the raw materials entering the furnace. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention 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 pyro-refining device of the embodiment of the present invention, the pure copper pyro-refining device comprises an oxidation refining furnace and a reduction refining furnace, wherein the oxidation refining furnace comprises, from top to bottom, a feeding zone, a preheating zone, a chemical zone and an oxidation refining zone which are interconnected, wherein the feeding zone is provided with a feeding port for feeding copper material, the preheating zone is used to preheat the copper material, the chemical zone is used to heat the copper material into copper liquid, the chemical zone is connected to the oxidation refining zone through a pipeline, the pipeline is used to transport the copper liquid, the oxidation refining zone is provided with a copper discharge port, a slag discharge port and a top-blowing lance, the copper discharge port is used to discharge the copper liquid, the slag discharge port is used to discharge slag, the top-blowing lance is used to feed oxygen-containing gas into the oxidation refining zone, and the reduction refining furnace is connected to the copper discharge port for reduction treatment of the copper liquid.

[0006] The pure copper pyrometallurgical refining device according to the embodiment of the present invention has the advantages of improving the grade of copper liquid and high production efficiency. The present application has the following advantages: the copper material is oxidized and impurities are removed by oxidation refining furnace, the oxidation effect can be adjusted by controlling the top-blowing spray gun, and the oxidation refining furnace can produce high-grade copper in combination with the reduction refining furnace without the need for electrolytic refining.

[0007] In some embodiments, the pure copper fire refining device further comprises a flue, the two ends of which are respectively connected to the oxidation refining zone and the chemical material zone, and the flue is used to transport the flue gas from the oxidation refining zone into the chemical material zone.

[0008] In some embodiments, a flux feeding port is provided at the top of the oxidative refining zone for feeding flux.

[0009] In some embodiments, the copper discharge port is arranged at the bottom of the oxidation refining zone away from the chemical processing zone, and the slag discharge port is higher than the copper discharge port.

[0010] In some embodiments, an emergency fume vent is provided at the top of the feed zone.

[0011] In some embodiments, the reduction refining furnace may be a rotary anode furnace, a stationary anode furnace, or a tilting furnace.

[0012] In some embodiments, a burner is arranged on the material-smelting zone, and a burner is set at one end of the oxidation refining zone away from the material-smelting zone.

[0013] In some embodiments, one or more layers of the burners are arranged below the chemical zone, and the number of the burners in each layer is at least one.

[0014] In some embodiments, there is at least one top-blowing spray gun.

[0015] According to the pure copper fire refining process of the embodiment of the present invention, the pure copper fire refining process comprises the following steps:

[0016] The copper material is fed into the feed port of the feed zone of the oxidation refining furnace. After the copper material falls into the preheating zone, it is preheated by the flue gas from the oxidation refining zone and the material processing zone. The copper liquid after the copper material is melted in the material processing zone flows into the oxidation refining zone.

[0017] A top-blowing lance blows oxygen-containing gas into the oxidation refining zone to oxidize and slag, a flux feeding port feeds flux into the oxidation refining zone to form oxidized slag with impurity elements in the copper liquid, the oxidized slag is discharged through a slag discharge port, and the copper liquid enters a reduction refining furnace through a copper discharge port for reduction and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of a pure copper fire refining device according to an embodiment of the present invention.

[0019] Figure numerals: 1. Chemical zone; 2. Preheating zone; 3. Feeding zone; 4. Oxidation refining zone; 5. Feeding port; 6. Smoke outlet; 7. Accidental smoke outlet; 8. Flux feeding port; 9. Top-blowing spray gun; 10. Slag outlet; 11. Copper outlet; 12. Burner; 13. Flue; 14. Reduction refining furnace. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0021] According to the pure copper pyro-refining device of the embodiment of the present invention, the pure copper pyro-refining device includes an oxidation refining furnace and a reduction refining furnace 14, the oxidation refining furnace includes a feeding zone 3, a preheating zone 2, a chemical zone 1 and an oxidation refining zone 4 which are interconnected from top to bottom, the feeding zone 3 is arranged with a feeding port 5 for feeding copper material, the preheating zone 2 is used to preheat the copper material, the chemical zone 1 is used to heat the copper material into copper liquid, the chemical zone 1 is connected to the oxidation refining zone 4 through a pipeline, the pipeline is used to transport the copper liquid, the oxidation refining zone 4 is arranged with a copper discharge port 11, a slag discharge port 10 and a top-blowing lance 9, the copper discharge port 11 is used to discharge the copper liquid, the slag discharge port 10 is used to discharge the slag, the top-blowing lance 9 is used to feed oxygen-containing gas into the oxidation refining zone 4, and the reduction refining furnace 14 is connected with the copper discharge port 11 to reduce the copper liquid. The oxidation refining furnace preheats the scrap copper and cold crude copper through the preheating zone 2, the copper material in the material zone 1 is melted to form copper liquid, and the oxidation refining of the copper liquid is completed in the oxidation refining zone 4, the smelting, oxidation process and reduction, casting process are separated, and the reduction refining furnace 14 performs reduction casting. The oxidation refining furnace removes impurities from the copper liquid and can increase the copper content of the copper liquid. The outer shell of the oxidation refining furnace is built with refractory bricks.

[0022] The pure copper fire refining device according to the embodiment of the present invention has the advantages of improving the grade of molten copper and high production efficiency.

[0023] In some embodiments, the pure copper pyro-refining device further comprises a flue 13 , the two ends of which are respectively connected to the oxidation refining zone 4 and the chemical zone 1 , and the flue 13 is used to transport the flue gas from the oxidation refining zone 4 into the chemical zone 1 .

[0024] Specifically, the design of the flue 13 can realize the recycling of flue gas and reduce heat energy loss, improve thermal efficiency, reduce energy consumption, and reduce environmental pollution. Optionally, the flue gas from the oxidation refining zone 4 can also be treated separately to reduce the flue gas entering the material processing zone 1.

[0025] Optionally, a guide plate is provided in the flue 13, and the guide plate is used to effectively guide the flow direction of the smoke, reduce eddy current and backflow, further reduce the flow resistance of the smoke, and improve the stability and uniformity of the smoke delivery. 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 smoke. The guide plate is arranged at the inlet and outlet of the flue 13, and the guide plate can be a straight plate or a curved plate. The guide plate can be fixed to the inner wall of the flue by welding, bolting, etc. to ensure the stability and reliability of the guide plate.

[0026] In some embodiments, a flux feeding port 8 is disposed at the top of the oxidative refining zone 4 for feeding flux.

[0027] Specifically, the flux feeding port 8 is arranged in the oxidation refining zone 4 to facilitate the control of the amount of flux added, improve the efficiency of removing impurities in the copper liquid, and enhance the purity of the copper.

[0028] Optionally, multiple flux feeding ports 8 may be provided at different positions of the oxidation refining zone 4, and flux may be added in stages and regions according to the distribution of impurities in the copper liquid and the reaction rate, so that the flux is in full contact with the copper liquid, thereby improving the impurity removal efficiency.

[0029] In some embodiments, the copper discharge port 11 is disposed at the bottom of the oxidation refining zone 4 at one end away from the smelting zone 1 , and the height of the slag discharge port 10 is higher than the copper discharge port 11 .

[0030] Specifically, the height of the slag discharge port 10 is higher than the copper discharge port 11. This layout is conducive to the separation of copper liquid and oxidized slag, reducing the loss of copper liquid, improving the recovery rate of copper, and reducing production costs.

[0031] In some embodiments, an emergency fume vent 7 is provided at the top of the feed zone 3 .

[0032] Specifically, the accident fume outlet 7 can quickly discharge harmful gases in an emergency to ensure production safety, improve the safety of the production process, and reduce the risk of accidents. It can avoid the difficulty of discharging a large amount of fume generated in the oxidation refining zone 4, reduce the pressure in the oxidation refining furnace, and ensure the safe operation of the equipment.

[0033] In some embodiments, the reduction refining furnace 14 may be a rotary anode furnace, a stationary anode furnace, or a tilting furnace.

[0034] Specifically, the selection of multiple reduction refining furnaces 14 can adapt to different production needs, improve the flexibility of the device, and meet production of different scales and refining requirements. The reduction refining furnace 14 is connected to the copper outlet 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. Its furnace body can rotate 360°, and the rotating furnace body buries the tuyere under the liquid surface for reduction operation. The rotary anode furnace can also adopt breathable brick technology to carry out nitrogen bottom blowing to greatly shorten the reduction time and improve the quality of copper liquid. The fixed anode furnace has a relatively simple structure and is suitable for small and medium-sized production. Its furnace body is fixed and the reduction operation is achieved by adjusting the position of the tuyere. The tilting furnace combines the advantages of the reverberatory furnace and the rotary furnace. The furnace chamber has a large heat exchange area, and the rotary furnace is rotatable. The tilting furnace can handle both hot and cold materials and has strong adaptability.

[0035] In some embodiments, a heat-insulating material is disposed outside the flow channel to reduce heat loss. The heat-insulating material may be aluminum silicate fiber, asbestos, or other materials to reduce heat loss and maintain the high temperature of the copper liquid, which is beneficial to the subsequent reduction reaction.

[0036] In some embodiments, a burner 12 is arranged on the material-smelting zone 1 , and a burner 12 is provided at one end of the oxidation refining zone 4 away from the material-smelting zone 1 .

[0037] Specifically, the burners 12 are arranged in the chemical zone 1 and the oxidation refining zone 4 to achieve efficient heating and melting of the copper material, increase the melting speed of the copper material, and shorten the production cycle. The fuel burned by the burner 12 can be natural gas, heavy oil, diesel, and the combustion air can be compressed air, oxygen-enriched air, or pure oxygen.

[0038] In some embodiments, one or more layers of burners 12 are arranged below the material-processing zone 1 , and the number of burners 12 in each layer is at least one.

[0039] Specifically, the multi-layer burner 12 design can better control the heating temperature and flame distribution, improve thermal efficiency, reduce energy consumption, and improve the melting quality of the copper material. The multi-layer burner 12 distribution can fully heat the copper material.

[0040] Optionally, multiple burners are formed on the furnace wall of the melting zone 1 to form an annular or spiral combustion area, so that the copper material is heated more evenly and the melting efficiency is improved. Multiple layers of burners are arranged in layers around the furnace wall, and the number of burners in each layer is the same to form an annular combustion area. 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.

[0041] The spiral combustion area adopts a burner with a swirl structure to spray the combustion medium in the form of a swirl. The burner can be arranged along a spiral trajectory in the furnace body. 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 partition to enhance the rotating flow effect.

[0042] In some embodiments, there is at least one top blowing lance 9.

[0043] Specifically, the top-blowing spray gun 9 is used to feed compressed air or oxygen-enriched air into the oxidation refining zone 4 for oxidation slag removal. The increase in the number of top-blowing spray guns 9 can improve the oxidation refining efficiency and ensure that impurities in the copper liquid are effectively removed. Optionally, the top-blowing spray gun 9 can adjust the spray gun position according to the liquid level in the oxidation refining zone 4 to ensure the gas supply effect. The spray gun can be adjusted up and down according to the liquid level in the oxidation refining zone 4 to ensure that the nozzle of the spray gun is always located at the appropriate position on the surface of the copper liquid. The adjustment method can be manual or automatic, and the automatic adjustment can detect the liquid level through a sensor, and then drive the spray gun lifting mechanism to adjust it. The spray gun lifting mechanism can be a linear drive device such as an electric push rod and a cylinder. Optionally, it also includes an angle adjustment mechanism, which allows the spray gun to adjust its injection angle as needed to change the injection direction and range of the gas in the molten pool. The angle adjustment mechanism can be a rotating member, and the rotating member is connected to the spray gun to drive the spray gun to rotate.

[0044] It is understandable that multiple spray guns can be arranged according to a certain spacing and arrangement to achieve uniform oxidation treatment of different areas in the molten pool. The spray guns can be arranged in a ring, and the distance between each spray gun is equal to form a complete ring, which can make the oxidizing gas evenly cover the entire surface of the molten pool, promote the full contact between the copper liquid and the oxidizing gas, and improve the oxidation slag removal efficiency. At the same time, the ring arrangement is also conducive to forming a stable airflow circulation on the surface of the molten pool. The spray guns can be arranged in a rectangular array, and the rectangular array is adapted to rectangular molten pools of different sizes. In addition, the rectangular arrangement helps to achieve uniform oxidation treatment in various areas of the molten pool. The spray guns can be arranged in a spiral trajectory, gradually expanding from the center of the molten pool to the outside, forming a spiral arrangement pattern. The spiral arrangement enables the oxidizing gas to gradually diffuse from the center of the molten pool to the periphery, 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.

[0045] In some embodiments, a thermal insulation layer is also included, and the thermal insulation layer is arranged in the preheating zone 2, the material zone 1 and the oxidation refining zone 4 to reduce heat loss. The material of the thermal insulation layer can be aluminum silicate fiber, asbestos, polyurethane foam plastics and other materials to reduce the heat loss of the furnace body of the oxidation refining furnace, and the material of the thermal insulation layer is attached to the refractory bricks of the furnace body. Rock wool, polyurethane foam plastics, expanded perlite and other materials can also be used as the thermal insulation layer. Rock wool has good high temperature resistance and heat insulation effect, and is suitable for use in high-temperature furnace bodies; polyurethane foam plastics have a high closed-cell rate, excellent thermal insulation performance, and good flexibility and adhesion, and can fit tightly with the furnace body; the expanded perlite has a porous structure inside, is light in weight, has good insulation performance, and has high chemical stability.

[0046] In some embodiments, a reflective layer may be provided on one side of the insulation layer adjacent to the preheating zone 2, the chemical zone 1 and the oxidation refining zone 4 to reduce heat radiation loss. The reflective layer may be glass fiber with an aluminum film, metal foil such as aluminum foil, stainless steel foil, nickel foil, etc. The reflective layer needs to withstand the high temperature in the working environment and have good chemical stability and does not react with the insulation material of the insulation layer. The stainless steel foil has a high reflectivity and good high temperature resistance and can be used for a long time in a high temperature environment; the nickel foil not only has a high reflectivity, but also has excellent oxidation resistance and corrosion resistance, and is suitable for use in a high temperature oxidation environment such as an oxidation refining furnace.

[0047] Optionally, the reflective layer is designed as a detachable module to facilitate installation and replacement of damaged reflective layers. For example, the reflective layer is divided into multiple small reflective blocks, each of which is fixed to the insulation layer by buckles or screws. When a certain reflective layer is damaged or needs to be replaced, only the part needs to be removed and replaced, without replacing the entire reflective layer. The edges of the reflective blocks are provided with serrated protrusions to match with adjacent reflective blocks. The reflective blocks are engaged with each other through the serrated protrusions to achieve mutual splicing between the reflective blocks, so that the reflective blocks can be quickly installed.

[0048] In some embodiments, a first baffle is provided at the copper outlet. The first baffle is located in the oxidation refining zone 4 to change the size of the copper outlet. A through hole is provided on the first baffle. As the first baffle moves in the oxidation refining zone 4, the through hole partially overlaps with the copper outlet to change the size of the copper outlet, thereby achieving accurate copper outlet. The first baffle can be made of high temperature resistant and corrosion resistant materials, such as silicon carbide, alumina ceramics, etc. These materials can maintain stable performance in high temperature environments, and have good chemical corrosion resistance, and can resist the erosion of oxides and other impurities in the copper liquid.

[0049] The first baffle can be remotely controlled and automatically controlled by electric or pneumatic drive such as electric push rod, cylinder, etc. Optionally, a plurality of through holes can be set on the first baffle, each of which has a different diameter, and a certain distance is spaced between adjacent through holes. By aligning different through holes with the copper outlet, the flow rate of the copper liquid flowing out of the copper outlet can be controlled and adjusted to meet different production needs. Optionally, a temperature sensor is set at the copper outlet to monitor the temperature of the copper liquid in real time to ensure the stability of the copper outlet process.

[0050] Optionally, the surface of the first baffle is provided with conical, arc-shaped or wavy protrusions, which can better guide the flow of the copper liquid, reduce the impact force of the copper liquid on the first baffle, and extend the service life of the baffle. The protrusions can also disturb the copper liquid and help the copper liquid flow more evenly. Optionally, the surface of the first baffle is coated with a layer of high-temperature resistant and corrosion-resistant coating, such as silicon nitride, boron carbide, etc. The coating can further improve the high-temperature resistance and chemical corrosion resistance of the first baffle, extend the service life of the first baffle, and reduce the adhesion of residues on the surface of the first baffle.

[0051] The vibration mechanism is used to drive the oxidation refining zone 4 to vibrate, increase the flow of the copper liquid, fully separate the oxide slag from the copper liquid, and concentrate the oxide slag on the upper layer of the copper liquid; the vibration mechanism can adopt electromagnetic vibration or mechanical vibration, and adjust the vibration frequency and amplitude according to actual production needs. The vibration mechanism can include a hammer-type electromagnetic vibrator, which can be arranged below the oxidation refining zone 4. After the excitation coil is energized, the hammer head is driven to hammer the outer wall of the furnace body. After the power is off, the hammer head is reset under the action of gravity. The vibration impact caused by hammering on the copper liquid in the furnace body can promote the separation of the copper liquid and the oxide 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.

[0052] According to the pure copper fire refining process of the embodiment of the present invention, the pure copper fire refining process comprises the following steps:

[0053] The copper material is fed into the feed port 5 of the feed zone 3 of the oxidation refining furnace. After the copper material falls into the preheating zone 2, it is preheated by the flue gas from the oxidation refining zone 4 and the material processing zone 1. The copper liquid after the copper material is melted in the material processing zone 1 flows into the oxidation refining zone 4.

[0054] The top-blowing lance 9 blows oxygen-containing gas into the oxidation refining zone 4 to oxidize and slag, and the flux feeding port 8 feeds flux into the oxidation refining zone 4 to form oxidized slag with impurity elements in the copper liquid. The oxidized 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 for reduction and processing. The melting and oxidation of the material smelting zone 1 and the oxidation refining zone 4 can be operated continuously or periodically; in the periodic operation, when the oxidation operation is performed, the material feeding amount and the amount of fuel used in the material smelting zone 1 can be controlled to control the material smelting speed.

[0055] The technical advantages of the pure copper pyro-refining device according to the embodiment of the present invention are the same as the technical advantages of the pure copper pyro-refining device described above, which will not be repeated here.

[0056] Embodiment 1:

[0057] Processing scrap copper, containing 90% copper; processing capacity 20t / h. The burners 11 of the oxidation refining furnace are arranged in three layers, with a total of 12 burners, using natural gas as fuel, and the oxygen-enriched concentration of the combustion air is 45%; there are 3 top-blowing lances 8, each of which blows 500-2000Nm of compressed air. 3 / h, the burner 11 uses pure oxygen to burn natural gas for heat supplementation, and the produced copper liquid contains 0.5-0.8% oxygen and 99.2-99.4% copper.

[0058] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0062] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. 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 present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0063] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A pure copper fire refining device, characterized in that: include: An oxidation refining furnace, the oxidation refining furnace comprises, from top to bottom, a feeding zone, a preheating zone, a chemical zone and an oxidation refining zone which are interconnected, the feeding zone is provided with a feeding port for feeding copper material, the preheating zone is used to preheat the copper material, the chemical zone is used to heat the copper material into copper liquid, the chemical zone is connected to the oxidation refining zone through a pipeline, the pipeline is used to transport the copper liquid, the oxidation refining zone is provided with a copper discharge port, a slag discharge port and a top-blowing lance, the copper discharge port is used to discharge the copper liquid, the slag discharge port is used to discharge slag, and the top-blowing lance is used to feed oxygen-containing gas into the oxidation refining zone; A reduction refining furnace is connected to the copper discharge port to perform reduction treatment on the copper liquid.

2. The pure copper fire refining device according to claim 1, characterized in that: It also includes a flue, the two ends of which are connected to the oxidation refining zone and the material-making zone respectively, and the flue is used to transport the flue gas from the oxidation refining zone into the material-making zone.

3. The pure copper fire refining device according to claim 1, characterized in that: A flux feeding port is arranged at the top of the oxidation refining zone for feeding flux.

4. The pure copper fire refining device according to claim 1, characterized in that: The copper discharge port is arranged at the bottom of the oxidation refining zone away from the material processing zone, and the height of the slag discharge port is higher than that of the copper discharge port.

5. The pure copper fire refining device according to claim 1, characterized in that: An emergency smoke outlet is arranged on the top of the feeding area.

6. The pure copper fire refining device according to claim 1, characterized in that: The reduction refining furnace may be a rotary anode furnace, a fixed anode furnace or a tilting furnace.

7. The pure copper fire refining device according to claim 1, characterized in that: A burner is arranged on the material-forming zone, and a burner is arranged at one end of the oxidation refining zone away from the material-forming zone.

8. The pure copper fire refining device according to claim 7, characterized in that: One or more layers of the burners are arranged below the material-processing zone, and the number of the burners in each layer is at least one.

9. The pure copper fire refining device according to claim 8, characterized in that: There is at least one top-blowing spray gun.

10. A pure copper fire refining process, using the pure copper fire refining device as claimed in claim 1, characterized in that: The following steps are involved: The copper material is fed into the feed port of the feed zone of the oxidation refining furnace. After the copper material falls into the preheating zone, it is preheated by the flue gas from the oxidation refining zone and the material processing zone. The copper liquid after the copper material is melted in the material processing zone flows into the oxidation refining zone. A top-blowing lance blows oxygen-containing gas into the oxidation refining zone to oxidize and slag, a flux feeding port feeds flux into the oxidation refining zone to form oxidized slag with impurity elements in the copper liquid, the oxidized slag is discharged through a slag discharge port, and the copper liquid enters a reduction refining furnace through a copper discharge port for reduction and processing.

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