A smelting equipment for extracting valuable metals from 3N selenium residue

Abstract

This utility model discloses a smelting device for extracting valuable metals from 3N selenium slag, comprising a machine body, a stirring mechanism installed in the upper part of the machine body, a connecting pipe connected to the side of the machine body, an additive cylinder with graduated lines on the side installed at the top of the connecting pipe, a recovery component installed at the top front of the machine body, and a smelting mechanism installed at the lower part of the machine body. This utility model utilizes the stirring mechanism within the machine body to ensure thorough mixing of the selenium slag with additives and reactants, ensuring uniform reaction and improving smelting efficiency. Several evenly distributed electric heating tubes are installed on the inner wall of the smelting cylinder to ensure uniform temperature within the smelting cylinder, further enhancing the smelting effect. SeO2 gas is extracted through a main pipe and transported via pipeline to a condenser or conveying equipment for condensation or further treatment, ensuring effective recovery of SeO2. After the smelting cylinder cools, the sealing door is opened to discharge the slag phase and collect the valuable metal compounds.

Description

Technical Field

[0001] This utility model belongs to the technical field of smelting equipment, specifically relating to a smelting equipment for extracting valuable metals from 3N selenium slag. Background Technology

[0002] Selenium is an important rare metal that plays a crucial role in industry. It is primarily found in copper concentrate and is further concentrated in copper electrolysis anode mud; over 90% of the raw materials for selenium extraction come from copper anode mud. China's copper industry selenium resources are mainly concentrated in the copper anode mud of Southwest Copper, Southeast Copper, and Chifeng Yunnan Copper. Chinese copper companies have developed a set of selenium slag pretreatment processes and copper anode mud selenium purification processes. Currently, commonly used pyrometallurgical extraction methods for selenium, such as the Chinese invention patent "A Method for Recovering Selenium and Precious Metals from Selenium Slag" (Publication No. CN118908155A), require smelting the selenium slag. Commonly used smelting equipment, such as the Chinese utility model patent, Publication No. CN201621055282.6, describes a smelting crucible furnace for precious metal extraction, including an iron furnace shell. The furnace shell comprises a cylindrical shell and a bottom plate and an upper ring plate fixedly connected to both ends of the cylindrical shell. A furnace door is hinged to the upper ring plate. A furnace liner is coaxially fixed inside the shell. The furnace liner has a plurality of heat transfer holes evenly distributed on it. An electric heater is fitted on the radially outer side of the furnace liner. A lateral insulation layer is provided between the radially outer side of the electric heater and the shell. A refractory support pad and a bottom insulation layer are sequentially provided between the furnace liner and the bottom plate of the furnace shell. A refractory support ring is provided around the upper end of the furnace liner. A removable inner liner is provided inside the furnace liner. The inner liner contains a material container. A steel inner liner is installed within the furnace liner to form a protective layer for the furnace chamber, preventing the leakage of corrosive liquids from the precious metal extraction material or the formation of corrosive gases from the evaporation of these liquids, which could corrode the furnace liner and electric heater, thus avoiding property damage. The material container within the inner liner also serves as a heating vessel. The precious metal extraction material is placed in the inner liner for heating. After heating, the material container is directly removed from the inner liner, facilitating the transfer of the precious metal extraction material and ensuring the safety of the crucible furnace. The furnace liner is evenly and densely covered with numerous heat transfer holes, forming an open furnace liner. Heat from the electric heater can radiate more directly into the furnace chamber through these holes, improving energy utilization. Existing copper smelting 3N selenium slag metal extraction devices cannot fully mix the 3N selenium slag with the reactant, and uneven heating occurs during the 3N selenium slag metal extraction process, making it impossible to recover gaseous SeO2, resulting in a low metal extraction rate. Utility Model Content

[0003] The purpose of this invention is to provide a smelting device for extracting valuable metals from 3N selenium slag, so as to solve the problems mentioned in the background art.

[0004] This utility model provides the following technical solution: a smelting device for extracting valuable metals from 3N selenium slag, including a machine body, a stirring mechanism installed in the upper part of the machine body, a connecting pipe connected to the side of the machine body, an additive cylinder with scale lines on the side installed at the top of the connecting pipe, a recovery component installed at the top front side of the machine body, and a smelting mechanism installed at the lower part of the machine body.

[0005] Furthermore, preferably, the stirring mechanism includes a stirring vessel, a driving component, a feed valve, a discharge bin, a discharge pipe, and a solenoid valve.

[0006] The top of the mixing vessel is equipped with a drive unit, and the top side of the mixing vessel is equipped with a feed valve. The bottom of the mixing vessel is equipped with a conical or funnel-shaped discharge bin, and the center of the discharge bin is connected to a discharge pipe. The discharge pipe is controlled by a solenoid valve to discharge materials.

[0007] Furthermore, preferably, the driving component includes a driver, and the output shaft of the driver is connected to a linkage shaft of the side stirring plate via a coupling; the linkage shaft drives the stirring plate to rotate.

[0008] Furthermore, preferably, the top of the stirring vessel has a liquid inlet hole, and a connecting pipe passes through the body wall and communicates with the liquid inlet hole.

[0009] Furthermore, preferably, the recycling component includes a main pipe and branch pipes, with the upper end of the main pipe passing through the machine wall and communicating with the smelting mechanism, while the lower end of the main pipe passes into the intermediate box.

[0010] Furthermore, preferably, the smelting mechanism includes a smelting cylinder, a sealing door, and a top slot. The bottom inclined side of the smelting cylinder is equipped with an openable and closable sealing door, and the top slot is opened at the top of the smelting cylinder and is connected to the upper discharge pipe.

[0011] Furthermore, preferably, a temperature and pressure gauge and an electric heater are installed on both sides of the melting cylinder, respectively. The electric heater is electrically connected to an electric heating tube located on the inner wall of the melting cylinder. Several electric heating tubes are arranged along the inner wall of the melting cylinder, and the electric heating tubes are evenly distributed.

[0012] The beneficial effects of this utility model are:

[0013] This invention uses a stirring mechanism inside the machine to fully mix selenium slag with additives and reactants, ensuring uniform reaction and improving smelting efficiency.

[0014] The inner wall of the melting cylinder is equipped with several heating tubes, which are evenly distributed to ensure a uniform temperature inside the melting cylinder and improve the melting effect.

[0015] SeO2 gas is extracted through the main pipe and transported to a condenser or conveying equipment for condensation or further treatment to ensure effective recovery of SeO2. After the smelting cylinder cools down, the sealing door is opened to discharge the slag phase and collect the valuable metal compounds. Attached Figure Description

[0016] Figure 1 This is a left perspective view of the present invention;

[0017] Figure 2 This is a perspective view of the right side of this utility model;

[0018] Figure 3 This is a three-dimensional schematic diagram of the stirring mechanism of this utility model;

[0019] Figure 4 This is a three-dimensional schematic diagram of the driving component of this utility model;

[0020] Figure 5 This is a three-dimensional schematic diagram of the recycling component of this utility model;

[0021] Figure 6 This is a three-dimensional schematic diagram of the melting mechanism of this utility model;

[0022] Figure 7 This is a view of the present invention from the direction of the sealed door.

[0023] In the diagram: 1. Machine body; 2. Stirring mechanism; 201. Stirring vessel; 202. Drive component; 2021. Driver; 2022. Coupling; 2023. Linkage shaft; 2024. Stirring plate; 2025. Through groove; 203. Feed valve; 204. Discharge bin; 205. Discharge pipe; 206. Solenoid valve; 207. Liquid inlet; 3. Intermediate tank; 4. Recovery assembly; 401. Main pipe; 402. Branch pipe; 5. Connecting pipe port; 6. Melting mechanism; 601. Melting cylinder; 602. Sealing door; 603. Top groove opening; 604. Safety valve; 605. Heating element; 606. Concentration detector; 7. Heater; 8. Control box; 9. Connecting pipe; 10. Electromagnetic flow meter; 11. Additive cylinder; 12. Exhaust fan; 13. Temperature and pressure gauge. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6The present invention provides the following technical solution: a smelting equipment for extracting valuable metals from 3N selenium slag, comprising a body 1, a stirring mechanism 2 installed in the upper part of the body 1, a connecting pipe 9 connected to the side of the body 1, an additive cylinder 11 with scale lines on the side installed at the top of the connecting pipe 9, the additive cylinder 11 being threadedly connected to the connecting pipe 9, of course, the additive cylinder 11 can also be placed on the ground or in other locations, and a pump is used to connect to the connecting pipe 9, all of which are equivalent technologies, an electromagnetic flow meter 10 is installed on the connecting pipe 9, an intermediate box 3 is fixedly installed at the bottom front side of the body 1, and a recovery component 4 is installed on the top of the intermediate box 3.

[0026] The front top of the machine body 1 is equipped with a recycling component 4, the lower part of the machine body 1 is equipped with a smelting mechanism 6, and the bottom of the machine body 1 is equipped with a control box 8. The control box 8 is used to control the rotation of the stirring plate 2024 of the stirring mechanism 2, the heating element 7 of the smelting mechanism 6, the operation of the exhaust fan 12 on the recycling component 4, and the opening and closing of each valve body, and to display flow information, temperature information, and concentration information, etc. Its electrical control method is commonly used in the field, and will not be described in detail here.

[0027] like Figure 3 and Figure 4 As shown, the stirring mechanism 2 includes a stirring vessel 201, a driving component 202, a feed valve 203, a discharge bin 204, a discharge pipe 205, a solenoid valve 206, and a liquid inlet 207.

[0028] A drive unit 202 is installed on the top of the mixing vessel 201, and a feed valve 203 is installed on the side of the top of the mixing vessel 201. After the feed valve 203 is opened, the selenium slag that has been crushed to meet the particle size requirements enters the mixing vessel 201 through the connected conveying pipe. That is, the selenium slag enters the mixing vessel 201 through the upper feed pipe (the feed pipe is not shown in the figure). A cone-shaped or funnel-shaped discharge bin 204 is set at the bottom of the mixing vessel 201. The center of the discharge bin 204 is connected to the discharge pipe 205. The discharge pipe 205 is controlled by the solenoid valve 206 to discharge the material. The selenium slag that has been fully mixed with the additives and reactants enters the smelting mechanism 6 through the discharge pipe 205.

[0029] A drive unit 202 is installed on the top of the mixing vessel 201 within the mixing mechanism 2. The drive unit 202 includes a driver 2021 (motor). The output shaft of the driver 2021 is connected to a linkage shaft 2023 of the side mixing plate 2024 via a coupling 2022. The side mixing plate 2024 is a mixing plate with an inclined lower side; it can be one, two, or more, depending on the requirements. The linkage shaft 2023 drives the mixing plate 2024 to rotate, ensuring uniform mixing of the selenium residue and additives. A through-groove 2025 is provided on the mixing plate 2024 to facilitate material flow and prevent clogging. The inner wall of the mixing vessel 201 is coated with a wear-resistant material to extend the equipment's lifespan.

[0030] The top of the stirred tank 201 has a liquid inlet 207. A connecting pipe 9 passes through the wall of the machine body 1 and connects to the liquid inlet 207. Additives and reactants flow into the stirred tank 201 in a metered manner through the connecting pipe 9. The stirring plate 2024 inside the stirred tank 201 rotates, causing the selenium slag to mix thoroughly with the additives and reactants, ensuring uniform reaction and improving smelting efficiency. The solenoid valve 206 of the discharge pipe 205 precisely controls the discharge speed, ensuring that the mixture smoothly enters the smelting mechanism 6 for efficient processing.

[0031] like Figure 5 As shown, the recycling component 4 includes a main pipe 401 and a branch pipe 402. The upper end of the main pipe 401 passes through the wall of the machine body 1 and is connected to the smelting mechanism 6, while the lower end of the main pipe 401 is inserted into the intermediate box 3. An exhaust fan 12 is installed on the main pipe 401, and the branch pipe 402 is used to support the main pipe 401. One end of the branch pipe 402 is welded to the machine body 1, and the other end is welded to the main pipe 401 to stabilize the main pipe 401. A connecting pipe port 5 is inserted into the middle of the top of the intermediate box 3. The connecting pipe port 5 connects the intermediate box 3 to the condenser or conveying equipment through a pipe.

[0032] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the smelting mechanism 6 includes a smelting cylinder 601, a sealing door 602, a top slot 603, and a safety valve 604. The bottom inclined side of the smelting cylinder 601 is equipped with an openable and closable sealing door 602. The top slot 603 is opened at the top of the smelting cylinder 601 and is connected to the upper discharge pipe 205 to ensure that the mixture flows smoothly into the smelting cylinder 601.

[0033] Thermostat 13 and electric heater 7 are installed on both sides of the melting cylinder 601. The electric heater 7 is electrically connected to the electric heating tube 605 located in the inner wall of the melting cylinder 601. Several electric heating tubes 605 are arranged along the inner wall of the melting cylinder 601. The electric heating tubes 605 are evenly distributed to ensure that the temperature inside the melting cylinder 601 is uniform and to improve the melting effect.

[0034] A safety valve 604 and a concentration detector 606 are also installed on the side of the melting cylinder 601 of the melting mechanism 6. The safety valve 604 prevents the risk of overpressure. The concentration detector 606 monitors the SeO2 concentration.

[0035] In practical use, firstly, the selenium slag, after being crushed to meet the particle size requirements, enters the stirred tank 201 through a connected conveying pipe. Additives and reactants flow into the stirred tank 201 in measured quantities through connecting pipe 9. The stirring plate 2024 inside the stirred tank 201 rotates, causing the selenium slag to mix thoroughly with the additives and reactants. Then, after the solenoid valve 206 opens, the mixed material enters the melting cylinder 601. After the solenoid valve 206 closes, the electric heater 7 starts, and the electric heating tube 605 heats the melting cylinder 601. The mixture reacts rapidly under the heating of the electric heating tube 605, forming... The slag phase (mainly composed of NaNO2 (NaNO3), NaTeO4, and other solid valuable metal compounds) is deposited in the smelting mechanism 6. The oxidized gaseous SeO2 (selenium oxide) is extracted through the main pipe 401 and transported to the intermediate box 3 via a pipeline (not shown in the diagram, but connected to the connecting pipe 5) to the condenser or conveying equipment for condensation or further processing, ensuring effective SeO2 recovery. Simultaneously, the safety valve 604 and concentration detector 606 monitor the process in real time to ensure operational safety and efficiency. After smelting, the heater 7 is turned off, and the smelting cylinder 601 is allowed to cool. The sealing door 602 is then opened to discharge the slag phase and collect the valuable metal compounds, achieving the separation of valuable metals and selenium. The entire process is automated, ensuring high efficiency and environmental friendliness, and complying with the latest environmental standards.

[0036] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

Claims

1. A smelting apparatus for extracting valuable metals from 3N selenium slag, characterized in that, Includes a body (1), a stirring mechanism (2) is installed in the upper part of the body (1), a connecting pipe (9) is connected to the side of the body (1), an additive cylinder (11) with scale lines on the side is installed at the top of the connecting pipe (9), a recycling component (4) is installed on the top of the front side of the body (1), and a smelting mechanism (6) is installed at the bottom of the body (1).

2. The smelting equipment for extracting valuable metals from 3N selenium slag according to claim 1, characterized in that, The stirring mechanism (2) includes a stirring vessel (201), a driving component (202), a feed valve (203), a discharge bin (204), a discharge pipe (205), and a solenoid valve (206). A drive unit (202) is installed on the top of the mixing vessel (201), and a feed valve (203) is installed on the side of the top of the mixing vessel (201). A cone-shaped or funnel-shaped discharge bin (204) is provided at the bottom of the mixing vessel (201). A discharge pipe (205) is connected to the center of the discharge bin (204). The discharge pipe (205) controls the discharge through a solenoid valve (206).

3. The smelting equipment for extracting valuable metals from 3N selenium slag according to claim 2, characterized in that, The drive unit (202) includes a driver (2021), and the output shaft of the driver (2021) is connected to the linkage shaft (2023) of the side stirring plate (2024) via a coupling (2022); the linkage shaft (2023) drives the stirring plate (2024) to rotate.

4. A smelting apparatus for extracting valuable metals from 3N selenium slag according to claim 2 or 3, characterized in that, The top of the stirring vessel (201) has a liquid inlet hole (207), and the connecting pipe (9) passes through the wall of the body (1) and communicates with the liquid inlet hole (207).

5. The smelting equipment for extracting valuable metals from 3N selenium slag according to claim 1, characterized in that: The recycling component (4) includes a main pipe (401) and a branch pipe (402). The upper end of the main pipe (401) passes through the wall of the machine body (1) and is connected to the smelting mechanism (6), while the lower end of the main pipe (401) goes into the intermediate box (3).

6. A smelting apparatus for extracting valuable metals from 3N selenium slag according to claim 1 or 2, characterized in that, The smelting mechanism (6) includes a smelting cylinder (601), a sealing door (602), and a top slot (603). The bottom inclined side of the smelting cylinder (601) is equipped with an openable and closable sealing door (602). The top slot (603) is opened at the top of the smelting cylinder (601) and is connected to the upper discharge pipe (205).

7. A smelting apparatus for extracting valuable metals from 3N selenium slag according to claim 6, characterized in that, A temperature and pressure gauge (13) and an electric heater (7) are installed on both sides of the melting cylinder (601). The electric heater (7) is connected to an electric heating tube (605) located in the inner wall of the melting cylinder (601). Several electric heating tubes (605) are arranged along the inner wall of the melting cylinder (601) and the electric heating tubes (605) are evenly distributed.

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