An electrothermal melting pool for separating metal waste slag

Abstract

The present invention provides an electrothermal melting pool for separating metal waste residues, belonging to the metallurgical technology field, aiming to solve the problems of excessive residue in slag discharging and insufficient slag discharging efficiency in the electrothermal melting pool. It includes a melting pool body. The inner wall of the melting pool body is provided with an inner pool formed by the distribution of refractory bricks. The end and side of the melting pool body are respectively provided with a slag outlet and a copper outlet. The slag outlet is located at the top of the inner pool and communicates with the inside of the melting pool body. The top edge of the inner pool is in a stepped shape. A slag collecting plate is arranged on the top of the inner pool beside the slag outlet. Air holes are opened on the top refractory bricks at two adjacent corners of the melting pool body. An air duct is arranged outside the melting pool body, and the air duct is communicated with the air holes through a blowing mechanism.

Description

Technical Field

[0001] The present invention belongs to the field of metallurgical technology, and more specifically, particularly relates to an electrothermal melting pool for separating metal waste residues. Background Art

[0002] In the treatment of hazardous waste, useful metals are usually extracted from the hazardous waste for recycling. Some large factories use smelting furnaces. Among them, the copper smelting in an oxygen-enriched side-blowing furnace is a common method for smelting copper liquid from hazardous waste and recycling. By introducing current into the furnace through ultra-high-power graphite electrodes to discharge, the heat generated is used for smelting, which can shorten the smelting and melting time, reduce power consumption, and improve production efficiency, etc.

[0003] The liquid after smelting is stratified in the electrothermal melting pool. Since the copper liquid has the largest density and will precipitate at the bottom layer, the metal liquid can be taken out from the bottom layer to obtain the copper liquid. The removal of the waste residue on the upper layer is carried out by raising the liquid level during the continuous feeding process, and the waste residue on the top surface is discharged through the slag outlet. However, the slag discharge of the huge electrothermal melting pool is slow, and there is too much residue in the slag discharge, and the slag discharge efficiency is insufficient.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and an electrothermal melting pool for separating metal waste residues is provided, in order to achieve a more practical value purpose. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides an electrothermal melting pool for separating metal waste residues to solve the problems of too much residue in the slag discharge and insufficient slag discharge efficiency in the electrothermal melting pool.

[0006] The purpose and effect of an electrothermal melting pool for separating metal waste residues of the present invention are achieved by the following specific technical means:

[0007] An electrothermal melting pool for separating metal waste residues includes a melting pool body. The inner wall of the melting pool body is provided with an inner pool formed by the distribution of refractory bricks. The end and side of the melting pool body are respectively provided with a slag outlet and a copper outlet. The slag outlet is located at the top of the inner pool and is communicated with the inside of the melting pool body. The top edge of the inner pool is in a stepped shape. A slag collecting plate is arranged at the top of the inner pool beside the slag outlet. Air holes are opened on the top refractory bricks at two adjacent corners of the melting pool body. An air duct is arranged outside the melting pool body, and the air duct is communicated with the air holes through a blowing mechanism.

[0008] Further, the inner pool is oval. One of the air holes at the adjacent corners is arranged horizontally, and the air hole at the other corner is arranged vertically.

[0009] Further, a water inlet pipe and a water outlet pipe are respectively penetrated through the top of the melting pool body. One end of the water inlet pipe and the water outlet pipe is communicated with the inner layer of the melting pool body, and the other end drives the water to flow through a pump.

[0010] Furthermore, a copper tapping nozzle brick is provided at the copper tapping nozzle, and the copper tapping nozzle brick communicates with the refractory brick of the inner pool through a copper tapping hole.

[0011] Furthermore, the copper tapping nozzle brick is made of cut graphite electrodes, and after drilling the copper tapping nozzle brick, it is adhesively fixed to the refractory brick with green mud.

[0012] Furthermore, a copper tapping chute is provided outside the copper tapping nozzle, and a slag flowing chute is provided outside the slag tapping nozzle.

[0013] Furthermore, the air blowing mechanism includes a mounting cover provided on the outer side of the molten pool body. The outer side of the mounting cover communicates with an air duct, and its interior communicates with the refractory brick. A wind deflector is hinged at the bottom of the mounting cover, and a sealing block is connected to the end of the wind deflector. An arc-shaped notch centered on the hinge point of the wind deflector is provided on the side wall of the refractory brick close to the mounting cover. The wind deflector is used to drive the sealing block to slide at the arc-shaped notch, and an elastic member is provided between the wind deflector and the mounting cover so that the upward swing of the wind deflector drives the sealing block to block the air hole.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The inner pool with a stepped top makes the liquid level increase and the area increase after rising, floating more waste slag, improving the slag storage capacity of the upper slag layer. The setting of the air blowing holes accelerates the flow rate of the waste slag at the top to the slag tapping nozzle, improving the slag tapping efficiency.

[0016] 2. The oval inner pool and the orientation of the air holes at two adjacent corners cause the jet to form a rotational cycle on the liquid surface of the inner pool. The centrifugal force causes the waste slag to spread around, and the waste slag is collected at the slag tapping nozzle through the slag collecting plate, with higher slag tapping efficiency.

[0017] 3. The swingable wind deflector provided in the air blowing mechanism is pushed by the jet, which can prevent the backflow of the high-temperature solution through the air hole, reduce the loss of the air blowing mechanism, and extend its service life.

[0018] 4. The used graphite electrodes are removed and cut into blocks as the copper tapping nozzle bricks. Utilizing the high-temperature resistance, good chemical stability and oxidation resistance of the graphite electrodes, the used graphite electrodes are reused, improving the utilization rate of the used graphite electrodes. Making the copper turning can meet the material requirements of the copper tapping nozzle bricks at the copper tapping nozzle, reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of an electrothermal molten pool for separating metal waste slag according to the present invention.

[0020] Figure 2 is a schematic diagram of other angles of an electrothermal molten pool for separating metal waste slag according to the present invention.

[0021] Figure 3 It is a schematic diagram of the internal structure of the molten pool body in the present invention.

[0022] Figure 4 It is a side sectional view of an electrothermal molten pool for separating metal waste residues in the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the air blowing mechanism in the present invention.

[0024] Figure 6 It is a top sectional view of an electrothermal molten pool for separating metal waste residues in the present invention.

[0025] In the figure, the corresponding relationship between the component names and the attached drawing numbers is as follows:

[0026] 1. Molten pool body; 2. Support frame; 3. Steel platform; 4. Slag discharge port; 5. Electrode; 6. Water inlet pipe; 7. Water outlet pipe; 8. Slag flow chute; 9. Copper outlet; 10. Matte outlet; 11. Copper discharge chute; 12. Refractory brick; 13. Air duct; 14. Opening; 15. Slag collecting plate; 16. Air blowing mechanism; 17. Air hole; 161. Installation cover; 162. Wind baffle; 163. Plugging block; 164. Arc-shaped notch. Detailed implementation manners

[0027] The following further describes the implementation manners of the present invention in detail with reference to the attached drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0028] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. ..

[0029] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] Embodiment:

[0031] As shown in the appendix Figure 1 to the appendix Figure 6 as shown below:

[0032] The present invention provides an electrothermal melting pool for separating metal waste slag, which includes a melting pool body 1. The inner wall of the melting pool body 1 is provided with an inner pool formed by the masonry distribution of refractory bricks 12. The end and side of the melting pool body 1 are respectively provided with a slag outlet 4 and a copper outlet 9. The side of the melting pool body 1 is connected to an oxygen-enriched side-blown furnace (not shown in the figure) through an opening 14. A plurality of support frames 2 are arranged on the periphery of the melting pool body 1. The top of the support frame 2 is connected to a steel platform 3. Electrodes 5 are installed on the steel platform 3 by electrode clamps. The electrodes 5 pass through the top of the melting pool body 1 and extend into the melting pool body 1 to conduct electricity and provide heat. The liquid melted inside the oxygen-enriched side-blown furnace flows into the melting pool body 1 for precipitation, and the electrodes 5 provide heat to ensure that the liquid does not solidify;

[0033] The copper liquid will precipitate at the bottom due to its high density, while the waste slag floats on the surface. The molten copper liquid can be collected through the copper outlet 9 at the bottom. A copper orifice brick is provided at the copper outlet 9. The copper orifice brick is connected to the refractory brick 12 of the inner pool through a copper outlet hole. A 25-mm communicating copper outlet hole is provided between the copper orifice brick and the refractory brick 12. When discharging copper, an oxygen pipe is aligned with the copper outlet hole and ignited with a thermocouple to melt the solidified liquid at the copper outlet hole, and then the copper liquid will flow out from the copper outlet hole. When stopping the copper discharge, the worker uses a cone made of green mud to tightly block the copper outlet hole, blows air between the cone and the copper outlet hole, and after waiting for cooling, removes the green mud cone to block the copper outlet hole.

[0034] In this embodiment, the copper orifice brick is made of cut graphite electrodes. After the copper orifice brick is drilled, it is adhesively fixed to the refractory brick 12 with green mud. By utilizing the high temperature resistance, good chemical stability and oxidation resistance of the graphite electrodes, the waste graphite electrodes are reused, improving the utilization rate of the waste graphite electrodes. Making the copper orifice brick can meet the material requirements of the copper orifice brick at the copper outlet 9 and reduce the production cost.

[0035] The slag outlet 4 is located at the top of the inner pool and communicates with the inside of the melting pool body 1. The top edge of the inner pool is stepped. A slag collecting plate 15 is arranged on the top of the inner pool beside the slag outlet 4. A plurality of filter holes are distributed on the slag collecting plate 15. Air holes 17 are opened on the top refractory bricks 12 at two adjacent corners of the melting pool body 1. An air duct 13 is arranged outside the melting pool body 1. The air duct 13 is connected to the air holes 17 through a blowing mechanism 16. When discharging slag, water is injected into the inner pool. Since there is a partition layer in the melting pool body 1, the stepped inner pool at the top makes the liquid level rise and the area increase during the continuous feeding process through the opening 14, floating more waste slag and increasing the slag storage capacity in the upper slag layer. The air holes 17 are connected to the air duct 13 to blow air into the liquid level in the melting pool body 1, accelerating the flow rate of the waste slag at the top to the slag outlet 4 and improving the slag discharging efficiency.

[0036] The top of the molten pool body 1 is respectively penetrated by a water inlet pipe 6 and a water outlet pipe 7. One ends of the water inlet pipe 6 and the water outlet pipe 7 are communicated with the inner layer of the molten pool body 1, and the other ends drive the water to flow through a pump. The water inlet pipe 6 injects cooling water to cool the molten pool body 1, and the cooled water flows out through the water outlet pipe 7 to form a cooling circulation system.

[0037] In this embodiment, the inner pool is oval. One of the air holes 17 at adjacent corners is arranged horizontally, and the air hole 17 at the other corner is arranged vertically, as Figure 6 shown. The orientation of the air holes 17 enables the gas to blow the liquid surface of the inner pool to form a rotational circulation. The centrifugal force causes the waste residue to spread around, and the waste residue is collected at the slag outlet 4 through the slag collecting plate 15, resulting in higher slag discharging efficiency.

[0038] As Figure 5 shown, the air blowing mechanism 16 includes a mounting cover 161 arranged on the outer side of the molten pool body 1. The outer side of the mounting cover 161 is communicated with the air duct 13, and its interior is communicated with the refractory brick 12. The air holes 17 on the refractory brick 12 are inclined downward from outside to inside, reducing liquid backflow;

[0039] A wind shielding plate 162 is hinged at the bottom of the mounting cover 161. The end of the wind shielding plate 162 is connected with a plugging block 163. An arc-shaped notch 164 with the hinge point of the wind shielding plate 162 as the center is opened on the side wall of the refractory brick 12 close to the mounting cover 161. The wind shielding plate 162 is used to drive the plugging block 163 to slide at the arc-shaped notch 164. A tension spring is arranged between the wind shielding plate 162 and the mounting cover 161, so that the upward swing of the wind shielding plate 162 drives the plugging block 163 to block the air hole 17. When the gas is input outside the air duct 13, the gas pushes the wind shielding plate 162 to swing downward, and the wind shielding plate 162 drives the plugging block 163 to slide down at the arc-shaped notch 164, thereby exposing the air hole 17. At this time, the gas blows out from the air hole 17. When the air blowing stops, the tension spring drives the wind shielding plate 162 to reset, so that the plugging block 163 blocks the air hole 17 again. The plugging block 163 is made of lightweight refractory material, effectively preventing the high-temperature liquid from flowing back through the air hole 17.

[0040] Among them, a copper discharging chute 11 is arranged outside the copper discharging port 9. The copper liquid flowing out from the copper discharging hole is guided by the copper discharging chute 11 for easy collection. A slag flowing chute 8 is arranged outside the slag discharging port 4, and the end of the slag flowing chute 8 turns in a fan shape with an increased area, which plays a role in guiding the discharge of a large amount of waste residue.

[0041] In this embodiment, a matte port 10 higher than the copper discharging port 9 is also arranged beside the copper discharging port 9 for collecting the initially precipitated copper liquid to increase the output. The copper discharging port 9 lower than the matte port 10 has a longer precipitation time and a higher copper content in the obtained copper liquid.

[0042] The embodiments of the present invention are given for purposes of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention so as to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An electrothermal melting pool for separating metal waste residues, characterized in that: It includes a molten pool body (1). An inner pool formed by the masonry distribution of refractory bricks (12) is arranged on the inner wall of the molten pool body (1). A slag outlet (4) is opened at the end of the molten pool body (1), and a copper outlet (9) is opened on the side of the molten pool body (1). The slag outlet (4) is located at the top of the inner pool and communicates with the inside of the molten pool body (1). The edge of the top of the inner pool is stepped, so that during the continuous feeding process at the opening (14), the liquid level rises and the area increases, floating more waste slag and improving the slag storage capacity of the upper slag layer. A slag collecting plate (15) is arranged at the top of the inner pool beside the slag outlet (4). Air holes (17) are opened on the top refractory bricks (12) at two adjacent corners of the molten pool body (1). An air duct (13) is arranged outside the molten pool body (1), and the air duct (13) is communicated with the air holes (17) through a blowing mechanism; the inner pool is oval, one of the air holes (17) at the adjacent corners is arranged horizontally, and the air hole (17) at the other corner is arranged vertically; the blowing mechanism includes a mounting cover (161) arranged outside the molten pool body (1). The outside of the mounting cover (161) is communicated with the air duct (13), and its inside is communicated with the refractory brick (12). A wind baffle (162) is hinged at the bottom of the mounting cover (161). The end of the wind baffle (162) is connected with a plugging block (163). An arc-shaped notch (164) centered on the hinge point of the wind baffle (162) is opened on the side wall of the refractory brick (12) close to the mounting cover (161). The wind baffle (162) is used to drive the plugging block (163) to slide at the arc-shaped notch (164). An elastic member is arranged between the wind baffle (162) and the mounting cover (161), so that the upward swing of the wind baffle (162) drives the plugging block (163) to block the air hole (17).

2. The electrothermal melting pool for separating metal waste slag according to claim 1, characterized in that: A water inlet pipe (6) and a water outlet pipe (7) respectively penetrate through the top of the molten pool body (1). One ends of the water inlet pipe (6) and the water outlet pipe (7) are communicated with the inner layer of the molten pool body (1), and the other ends drive the water to flow through a pump.

3. The electrothermal melting pool for separating metal waste slag according to claim 1, wherein: A copper port brick is arranged at the copper outlet (9), and the copper port brick is communicated with the refractory brick (12) of the inner pool through a copper outlet hole.

4. The electrothermal melting pool for separating metal waste residues according to claim 3, wherein: The copper port brick is made of a cut graphite electrode, and after drilling the copper port brick, it is adhesively fixed on the refractory brick (12) through green mud.

5. The electrothermal melting pool for separating metal waste residues according to claim 1, characterized in that: An out-copper chute (11) is arranged outside the copper outlet (9), and a slag-flowing chute (8) is arranged outside the slag outlet (4).

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