Refining and atomizing integrated furnace for secondary metal

Abstract

The utility model provides a secondary metal refining and atomizing integrated furnace. The secondary metal refining and atomizing integrated furnace comprises a heating bin, an atomizing bin arranged below the heating bin, a vacuum condensation dust removal mechanism communicated with the heating bin, and a flue gas dust removal and waste heat recovery mechanism communicated with the atomizing bin. Wherein a sliding nozzle mechanism used for discharging molten metal is arranged at the bottom of the heating bin, and a water outlet of the sliding nozzle mechanism communicates with the atomization bin; an atomizing spray gun connected with the atomizing and blowing device is arranged in the atomizing bin, and the spraying direction of the atomizing spray gun points to the water outlet. Through the mode, the secondary metal refining and atomizing integrated furnace provided by the utility model has the advantages that molten metal obtained by refining in the heating bin can be directly output into the atomizing bin through the sliding nozzle mechanism at the bottom to be atomized into powder, and the furnace body does not need to be tilted, so that the operation efficiency is effectively improved; meanwhile, flue gas generated in the refining and atomizing processes can be effectively recycled, direct exhaust of the flue gas is avoided, and efficient and reasonable recycling of regenerated metal and heat energy is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of refining furnace equipment, in particular to a recycled metal refining and atomizing integrated furnace. Background Art

[0002] During their service, metal materials can suffer from a range of issues, including wear, scratches, and rust. These issues necessitate the replacement of a significant portion of these materials, generating a significant amount of scrap metal. To conserve resources, recycling and reusing this scrap metal is essential.

[0003] Currently, the most common method for recycling and reusing scrap metal is to smelt it into secondary metal. This smelting process typically involves a tilting refining furnace. However, smelting scrap metal using traditional tilting refining furnaces requires intermittent operation and requires tilting the furnace to separate the slag from the molten metal. This results in low overall efficiency, low metal recovery rates, and an inability to recycle waste heat from flue gases, resulting in a waste of resources.

[0004] In the prior art, the patent with announcement number CN202558908U provides a copper refining tilting furnace system, including a tilting refining furnace and a conveyor feeder. The main feeding port of the tilting refining furnace is arranged on the end wall with a smoke exhaust port or above it, overlapping with the smoke exhaust port, and the conveyor feeder is arranged between the main feeding port and the dust removal device. Through the above method, the copper refining tilting furnace system provided by the patent can reduce the heat loss during the feeding process, and it is easy to recover the waste heat of the flue gas, thereby reducing fuel consumption, shortening the melting time of the furnace charge, improving energy utilization efficiency, and enhancing the production capacity of the equipment. Although this method can play a role in the recovery of the waste heat of the flue gas to a certain extent, it still cannot solve the problems of low operating efficiency of the tilting furnace and low metal recovery and utilization rate. The molten metal obtained after refining needs to be converted into usable recycled metal products through other devices.

[0005] In view of this, it is necessary to design an improved smelting device to solve the above problems. Utility Model Content

[0006] In view of the defects of the above-mentioned prior art, the purpose of the present utility model is to provide a recycled metal refining and atomization integrated furnace, which can directly atomize the molten liquid obtained after scrap metal refining into powder for collection, thereby effectively improving the smelting efficiency and metal recovery rate without the need to tilt the furnace body.

[0007] To achieve the above-mentioned objectives, the utility model provides a regenerated metal refining atomization integrated furnace, comprising a heating chamber, an atomization chamber arranged below the heating chamber, a vacuum condensation dust removal mechanism connected to the heating chamber, and a flue gas dust removal and waste heat recovery mechanism connected to the atomization chamber; a sliding water gate mechanism for discharging molten metal is provided at the bottom of the heating chamber, and the water outlet of the sliding water gate mechanism is connected to the atomization chamber; an atomization spray gun connected to an atomizing blowing device is provided in the atomization chamber, and the spraying direction of the atomization spray gun points to the water outlet.

[0008] As a further improvement of the present invention, the vacuum condensation dust removal mechanism includes a vacuum pump, a condensation dust removal device whose two ends are respectively connected to the heating chamber and the vacuum pump, and a first powder storage device connected to the dust outlet of the condensation dust removal device.

[0009] As a further improvement of the present invention, the bottom discharge port of the atomization bin is connected to a second powder storage device, and a valve is provided in the bottom discharge port.

[0010] As a further improvement of the present invention, a crucible for accommodating molten metal is provided in the heating chamber, and an electromagnetic induction heating coil is provided outside the crucible.

[0011] As a further improvement of the present invention, a redox spray gun is provided at the top of the heating chamber, and the bottom end of the redox spray gun extends into the crucible.

[0012] As a further improvement of the present invention, the top of the heating bin is connected to a feeding bin.

[0013] As a further improvement of the present invention, a partition for closing the feeding bin is provided in the feeding bin.

[0014] As a further improvement of the present invention, a temperature measuring device is provided in the heating chamber.

[0015] As a further improvement of the present invention, a sampling and detection port is provided on the top of the heating chamber.

[0016] As a further improvement of the present invention, an observation hole is provided on the top of the heating chamber.

[0017] The beneficial effects of the utility model are:

[0018] The utility model provides a recycled metal refining and atomizing integrated furnace, which provides a sliding nozzle mechanism for discharging molten metal at the bottom of the heating chamber, and provides an atomizing chamber connected to the water outlet of the sliding nozzle mechanism below the heating chamber, so that the atomizing spray gun in the atomizing chamber points to the water outlet, and the molten metal obtained after the scrap metal is refined can be directly atomized into powder for collection without tilting the furnace body, thereby improving the smelting efficiency. At the same time, the utility model is provided with a vacuum condensation and dust removal mechanism, which can not only be used for vacuum smelting of scrap metal raw materials in the heating chamber, but also for condensation and dust removal of the flue gas generated in the heating chamber, which not only improves the recycling rate of the metal, but also avoids the direct discharge of dust-containing flue gas. In addition, the utility model is also provided with a flue gas dust removal waste heat recovery mechanism, which can efficiently recover and utilize the waste heat of the flue gas generated in the atomizing chamber and the recycled metal powder, effectively improving the resource utilization rate and meeting the needs of energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of the recycled metal refining and atomization integrated furnace provided by the utility model.

[0020] Reference numerals

[0021] 1. Heating chamber; 11. Crucible; 12. Electromagnetic induction heating coil; 13. Sliding gate mechanism; 14. Redox spray gun; 15. Feeding chamber; 16. Temperature measuring device; 17. Observation device; 18. Sampling device; 2. Atomizing chamber; 21. Atomizing spray device; 22. Atomizing spray gun; 31. Vacuum pump; 32. Condensation dust removal device; 33. First powder storage device; 4. Flue gas dust removal waste heat recovery mechanism; 5. Second powder storage device. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0024] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0025] like Figure 1As shown, the utility model provides a regenerated metal refining atomization integrated furnace, including a heating chamber 1, an atomizing chamber 2 arranged below the heating chamber 1, a vacuum condensation dust removal mechanism connected to the heating chamber 1, and a flue gas dust removal and waste heat recovery mechanism 4 connected to the atomizing chamber 2; the bottom of the heating chamber 1 is provided with a sliding water gate mechanism 13 for discharging molten metal, and the water outlet of the sliding water gate mechanism 13 is connected to the atomizing chamber 2; the atomizing chamber 2 is provided with an atomizing spray gun 22 connected to the atomizing blowing device 21, and the spraying direction of the atomizing spray gun 22 points to the water outlet.

[0026] Based on the integrated recycled metal refining and atomizing furnace provided by the present invention, scrap metal raw materials can be refined in the heating chamber 1. During the refining process, the vacuum condensation and dust removal mechanism can not only provide a vacuum environment for the heating chamber 1, but also condense and remove the dust carried in the flue gas generated during the refining process, thereby preventing the dust-containing flue gas from being directly discharged. After the refining is completed, the molten metal in the heating chamber 1 can be transported to the atomizing chamber 2 through the sliding nozzle mechanism 13, and argon gas is sprayed on the discharged molten metal droplets through the atomizing spray gun 22 to atomize it into powder, so that the recycled metal powder can be directly collected for easy storage and transportation.

[0027] In some preferred embodiments of the present invention, the vacuum condensation dust removal mechanism includes a vacuum pump 31, a condensation dust removal device 32 whose two ends are respectively connected to the heating chamber 1 and the vacuum pump 31, and a first powder storage device 33 connected to the dust outlet of the condensation dust removal device 32. With such a configuration, when the vacuum pump 31 is turned on, the gas in the heating chamber 1 can be extracted, so that a vacuum environment is formed in the heating chamber 1 for vacuum smelting. At the same time, the gas extracted by the vacuum pump 31 needs to pass through the condensation dust removal device 32. The flue gas generated during the refining process contains a large amount of volatile substances such as zinc, lead, SnO2, As2O3, Sb2O3, etc., which can be recovered in the condensation dust removal device 32.

[0028] During the atomization process, a large amount of flue gas is also generated. The heat energy of the recycled metal powder and the flue gas can be recovered by the flue gas dust removal and waste heat recovery mechanism 4 connected to the atomization chamber 2. The flue gas dust removal and waste heat recovery mechanism 4 can be a conventional dust removal and waste heat recovery mechanism that can perform dust removal and waste heat recovery functions. The present invention is not limited to its specific structure.

[0029] In some preferred embodiments of the present invention, an atomizing spray device 21 is provided on the outside of the top of the atomizing bin 2 for ejecting the inert gas to be sprayed according to the required temperature and air pressure. The specific structure of the atomizing spray device 21 can be selected in an existing device according to actual needs, and the present invention is not limited thereto. Inside the atomizing bin 2, an atomizing spray gun 22 is provided that is connected to the ejection end of the atomizing spray device 21. The spraying direction of the atomizing spray gun 22 points to the water outlet and is as close to the water outlet as possible so as to efficiently atomize the output molten metal. The bottom discharge port of the atomizing bin 2 is also connected to the second powder storage device 5, and a valve is provided in the bottom discharge port. When the second powder storage device 5 is full, the valve can be closed to transfer the recycled metal powder in the second powder storage device 5.

[0030] In actual applications, corresponding fixed brackets can also be provided to fix the recycled metal refining atomization integrated furnace to improve the overall stability of the device. For example, in some embodiments of the present invention, a first vertical bracket perpendicular to the bottom surface of the heating bin 1 is provided on one side of the atomizing bin 2 for supporting the bottom of the heating bin 1; on the other side of the atomizing bin 2, a horizontal bottom plate, a horizontal top plate and a second vertical bracket for connecting the horizontal bottom plate and the horizontal top plate are provided. Among them, the bottom surface of the horizontal bottom plate is on the same horizontal plane as the bottom surface of the second powder storage device 5, and is used to fix the flue gas dust removal waste heat recovery mechanism 4; the top surface of the horizontal top plate is on the same horizontal plane as the bottom surface of the heating bin 1, and is used to fix the vacuum pump 31, and to support the first powder storage device 33 and the heating bin 1. In other embodiments of the present invention, the specific structure of the fixed bracket can also be adjusted according to the actual installation and fixation needs.

[0031] In some preferred embodiments of the present invention, the heating chamber 1 is a closed chamber body, with only some passages or openings provided for connection to the vacuum condensation dust removal mechanism and other structures. The passages or openings connected to the other structures are all configured to be closable, so that the heating chamber 1 can be vacuumed when necessary while preventing smoke from escaping. For example, a feeding chamber 15 is connected to the top of the heating chamber 1. A partition is provided within the feeding chamber 15 for sealing the feeding chamber 15. When feeding is required, the partition is opened to allow material to be added to the feeding chamber 15. After feeding is completed, the partition can be closed.

[0032] In the heating chamber 1, there are provided a crucible 11 for containing molten metal and a heating device for heating the crucible 11. A sliding gate mechanism 13 for discharging the molten metal is also provided at the bottom of the crucible 11. Among them, the heating device and the sliding gate mechanism 13 can be selected from existing devices according to actual needs. In some embodiments of the present invention, an electromagnetic induction heating coil 12 is selected as the heating device, and a sliding gate mechanism 13 based on a hydraulic system to drive the gate opening and closing is selected. In other embodiments of the present invention, other existing heating devices and sliding gate mechanisms 13 can also be selected according to actual conditions, as long as they can meet the functional requirements of heating and refining and discharging of molten metal respectively.

[0033] In the heating chamber 1, structures such as an oxidation-reduction spray gun 14, a temperature measuring device 16, a sampling detection port, and an observation hole can also be set as needed. Among them, the bottom end of the oxidation-reduction spray gun 14 can be extended into the crucible 11 so that the oxidant or reducing agent can be directly introduced into the melt to improve the refining effect. The temperature measuring device 16 can be directly built into the heating chamber 1, or it can be inserted through a preset opening, and the opening can be closed when the temperature measuring device 16 is not inserted. Similarly, the sampling detection port is used to insert the sampling device 18 when needed, and can be closed when the sampling device 18 is not inserted. The observation hole can be directly set to a transparent material for observation, or it can be set to an opening, through which the observation device 17 is inserted to observe the situation inside the heating chamber 1, and the opening can be closed when the observation device 17 is not inserted.

[0034] Through the above-described approach, the heating chamber 1 can meet various requirements of the recycled metal refining process. The refined molten metal can be directly discharged from the water outlet into the atomization chamber 2 through the action of the sliding nozzle mechanism 13. After the atomization spray device 21 and the atomization spray gun 22 work together, it is atomized into recycled metal powder, which is then collected by the second powder storage device 5. The flue gas generated during the refining and atomization process can be effectively recovered by the vacuum condensation dust removal mechanism and the flue gas dust removal waste heat recovery mechanism 4, effectively improving resource utilization and meeting the requirements of energy conservation and environmental protection.

[0035] The working principle of the regenerated metal refining atomization integrated furnace provided by the utility model is described in detail below:

[0036] When using the integrated furnace for regenerating and atomizing recycled metals provided by the present invention, the waste metal to be processed is first added to the crucible 11 in the feeding bin 15 through the feeding bin 15, the crucible 11 is heated by the electromagnetic induction heating coil 12, and the vacuum pump 31 is turned on to vacuum smelt the waste metal. During the smelting process, the furnace temperature can be monitored by the temperature measuring device 16 as needed, and the smelting conditions in the furnace can be observed by the observation device 17. After the waste metal is completely melted, the vacuum pump 31 is turned off, and oxygen is introduced through the redox lance 14 for oxidation refining. After sufficient oxidation, the introduction of oxygen is stopped, and the vacuum pump 31 is turned on again to extract the flue gas. The condensation and dust removal device 32 is used to condense and recover substances such as zinc, lead, SnO2, As2O3, and Sb2O3 contained in the flue gas, and the recovered powder is stored in the first powder storage device 33.

[0037] During the refining process, the formed molten metal can also be sampled and tested through the sampling device 18, and the required flux can be added according to the test results. After the oxidation refining is completed, the redox lance 14 can be used to spray reducing gas for reduction refining. After sufficient reaction, the molten metal is discharged into the atomization bin 2 through the sliding gate mechanism 13, and argon is sprayed on the discharged molten metal droplets through the atomizing lance 22 to atomize them into powder. The generated recycled metal powder is stored in the second powder storage device 5. During the atomization process, the flue gas generated will enter the flue gas dust removal waste heat recovery mechanism 4 to recover the recycled metal powder and the heat energy of the flue gas, thereby playing a role in environmental protection and resource recycling.

[0038] In summary, the present invention provides a regeneration metal refining and atomizing integrated furnace, comprising a heating chamber 1, an atomizing chamber 2 arranged below the heating chamber 1, a vacuum condensation dust removal mechanism connected to the heating chamber 1, and a flue gas dust removal and waste heat recovery mechanism 4 connected to the atomizing chamber 2. Among them, a sliding nozzle mechanism 13 for discharging molten metal is provided at the bottom of the heating chamber 1, and the water outlet of the sliding nozzle mechanism 13 is connected to the atomizing chamber 2; an atomizing spray gun 22 connected to an atomizing spray device 21 is provided in the atomizing chamber 2, and the spraying direction of the atomizing spray gun 22 points to the water outlet. In the above manner, the regeneration metal refining and atomizing integrated furnace provided by the present invention can make the molten metal obtained by refining in the heating chamber 1 directly output to the atomizing chamber 2 through the sliding nozzle mechanism 13 at the bottom to be atomized into powder, without the need to tilt the furnace body, thereby effectively improving the operating efficiency; at the same time, the flue gas generated during the refining and atomizing process can also be effectively recovered, avoiding the direct discharge of the flue gas, and realizing the efficient and reasonable recovery of recycled metal and heat energy.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A recycled metal refining atomization integrated furnace, characterized by: It includes a heating chamber, an atomizing chamber arranged below the heating chamber, a vacuum condensation dust removal mechanism connected to the heating chamber, and a flue gas dust removal and waste heat recovery mechanism connected to the atomizing chamber; a sliding water gate mechanism for discharging molten metal is provided at the bottom of the heating chamber, and the water outlet of the sliding water gate mechanism is connected to the atomizing chamber; an atomizing spray gun connected to the atomizing blowing device is provided in the atomizing chamber, and the spraying direction of the atomizing spray gun points to the water outlet.

2. The recycled metal refining atomization integrated furnace according to claim 1, characterized in that: The vacuum condensation dust removal mechanism includes a vacuum pump, a condensation dust removal device whose two ends are respectively connected to the heating chamber and the vacuum pump, and a first powder storage device connected to the dust outlet of the condensation dust removal device.

3. The recycled metal refining atomization integrated furnace according to claim 1, characterized in that: The bottom discharge port of the atomization bin is connected to a second powder storage device, and a valve is provided in the bottom discharge port.

4. The integrated regenerated metal refining and atomizing furnace according to claim 1, characterized in that: A crucible for containing molten metal is provided in the heating chamber, and an electromagnetic induction heating coil is provided outside the crucible.

5. The integrated regenerated metal refining and atomizing furnace according to claim 4, characterized in that: A redox spray gun is provided on the top of the heating chamber, and the bottom end of the redox spray gun extends into the crucible.

6. The recycled metal refining atomization integrated furnace according to claim 1, characterized in that: The top of the heating bin is connected to a feeding bin.

7. The recycled metal refining and atomizing integrated furnace according to claim 6, characterized in that: A partition for closing the feeding bin is provided in the feeding bin.

8. The recycled metal refining and atomizing integrated furnace according to claim 1, characterized in that: A temperature measuring device is provided in the heating chamber.

9. The recycled metal refining and atomizing integrated furnace according to claim 1, characterized in that: A sampling and detection port is provided on the top of the heating chamber.

10. The recycled metal refining and atomizing integrated furnace according to claim 1, characterized in that: An observation hole is provided on the top of the heating chamber.

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