A vortex feeder for reducing molten copper slag

Abstract

The present application relates to copper slag comprehensive utilization technical field, specifically relates to a kind of eddy current feeder for molten copper slag reduction, comprising: cylinder;Feeding opening is opened in the upper of cylinder, and is communicated with cylinder;Spiral flow channel, it is set to the inside of cylinder, and is connected with the inner wall of cylinder, spiral flow channel is spirally arranged along the inner wall of cylinder downwards;Mixing chamber is set to the inside of cylinder, and is communicated with spiral flow channel;Slag injection port is opened in the lateral wall of cylinder, and is communicated with spiral flow channel;Bottom flow port is opened in the lower of cylinder, and is communicated with mixing chamber, reduction furnace all.The present application is provided with spiral flow channel in eddy current feeder, so that molten copper slag spirally flows and generates vortex, vortex negative pressure suction solid powder, solid powder realizes rapid dispersion, evenly distributed in molten copper slag, so that molten copper slag is adjusted from acidic slag to basic slag, quickly change slag type, reach preset alkalinity range, effectively avoid the corrosion of molten copper slag to furnace lining, more directly reduce hot molten copper slag with waste heat.

Description

Technical Field

[0001] The invention relates to the technical field of comprehensive utilization of copper slag, in particular to an eddy current feeder for reducing molten copper slag. Background Art

[0002] Non-blast furnace ironmaking technology is gaining increasing attention in my country's ironmaking industry because it can directly process hot slag and utilize mechanical stirring for multi-phase mixing, thus achieving efficient utilization of waste heat.

[0003] Chinese patent publication number CN113846203A discloses a mechanical stirring and jet desulfurization agitator for metallurgy, comprising a stirring shaft and a stirring head connected to the bottom of the stirring shaft; multiple stirring blades are arranged circumferentially on the outside of the stirring head, with adjacent stirring blades having the same angle; a straight-through blowing channel is provided on the stirring shaft, and downward-facing diverter pipes are provided within some or all of the stirring blades, each diverter pipe communicating with the straight-through blowing channel to form a jet gas channel; a jet port is formed at the end of each diverter pipe. Chinese patent publication number CN213086061U discloses a metal slag recovery and stirring device, comprising two columns, a crucible, a cover plate, and a fixed plate. The bottom of the crucible is provided with a discharge pipe, and the crucible is fixedly sleeved on the fixed plate. With the assistance of the movable mechanism, the cover plate is driven to rise by the movable mechanism, and then the motor is driven to rise, and the stirring paddle rises accordingly, so that the two blocking blocks are separated from the cone mouth and the discharge pipe respectively, and the material enters the leakage trough through the cone mouth. When the previous batch of materials leaks out of the discharge pipe, the next batch of materials enters the leakage trough for temporary storage.

[0004] However, the mixing technologies in both patents rely on mechanical stirring to provide external power. Mechanical stirring requires high electricity costs, and the stirring paddles are easily damaged by slag corrosion and thermal shock from the melt. Furthermore, because only a portion of the slag in the molten pool undergoes changes in acidity and alkalinity, this can still lead to corrosion of the furnace lining.

[0005] To this end, the present invention provides a vortex feeder for reducing molten copper slag. Summary of the Invention

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a vortex feeder for molten copper slag reduction, thereby solving the technical problems of the prior art that mechanical stirring requires very high electricity costs, the stirring paddle is easily damaged by slag corrosion and thermal shock of the melt, and because only local slag in the molten pool undergoes changes in acidity and alkalinity, it is still easy to cause corrosion of the furnace lining.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a vortex feeder for molten copper slag reduction, comprising: a cylinder; a feeding port, which is opened above the cylinder and connected to the cylinder; a spiral flow channel, which is arranged inside the cylinder and connected to the inner wall of the cylinder, and the spiral flow channel is spirally arranged downward along the inner wall of the cylinder; a mixing chamber, which is arranged inside the cylinder and connected to the spiral flow channel; a slag injection port, which is opened on the side wall of the cylinder and connected to the spiral flow channel; and a bottom flow port, which is opened below the cylinder and connected to both the mixing chamber and the reduction furnace.

[0008] Optionally, the overall structure of the cylinder is a conical structure or a cylindrical conical structure.

[0009] Optionally, the spiral flow channel includes: a slag injection pipe, which is arranged between the slag injection port and the cylinder; a flow channel plate, which is arranged in the mixing chamber, the upper end of the flow channel plate is connected to the slag injection pipe, and the flow channel plate is also connected to the inner wall of the cylinder; the flow channel plate is spirally arranged downward along the inner wall of the cylinder.

[0010] Optionally, along the axial direction of the cylinder, the pitch of the flow channel plate gradually decreases from top to bottom.

[0011] Optionally, the flow channel plate is any one of a curved plate, a single-layer flat plate or a double-layer flat plate.

[0012] Optionally, the diameter of the slag injection pipe gradually decreases from the slag injection port to the runner plate.

[0013] Optionally, the angle between the side wall of the slag injection pipe and the axial line of the slag injection pipe is 8° to 20°.

[0014] Optionally, the barrel, the slag injection pipe and the flow channel plate are made of graphite or a magnesium-carbon composite material.

[0015] Optionally, the pitch of the flow channel plate is 200 mm to 800 mm.

[0016] The beneficial effects of the present invention are:

[0017] The present invention provides a vortex feeder for reducing molten copper slag. A spiral flow channel is provided in the vortex feeder so that the molten copper slag added from the slag pouring port flows downward in a spiral shape along the spiral flow channel, thereby promoting the molten copper slag added from the slag pouring port and the solid powder added from the feeding port to form a vortex in a mixing chamber of the vortex feeder, generating a negative pressure suction effect, so that the solid powder is sucked by the vortex negative pressure and quickly dispersed in the molten copper slag in the vortex feeder, thereby strengthening the melting multiphase reaction process and more directly reducing the hot molten copper slag with residual heat.

[0018] Furthermore, the solid powder is evenly distributed in the molten copper slag, which can quickly adjust the pH of the molten copper slag, change the acid-base type of the molten copper slag, and adjust the molten copper slag from acidic to alkaline, effectively avoiding the corrosion of the molten copper slag on the furnace lining.

[0019] Furthermore, the molten copper slag and the solid powder are efficiently premixed in the eddy current feeder before flowing into the reduction furnace, thereby enhancing the mixing effect of the molten copper slag and the solid powder and improving the reduction efficiency of the molten copper slag.

[0020] Furthermore, the eddy current feeder of the present invention directly utilizes the flow potential energy of the molten copper body as the power required for mixing the molten copper slag with the solid powder, avoiding the electricity cost and energy consumption consumed by mechanical stirring mixing, electromagnetic stirring mixing, etc., effectively reducing the damage rate of the stirring equipment, and thus improving the economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the eddy current feeder of the present invention disposed inside a reduction furnace;

[0022] Figure 2 This is an overall schematic diagram of the eddy current feeder of the present invention having a conical structure;

[0023] Figure 3 This is an overall schematic diagram of the eddy current feeder of the present invention having a cylindrical cone structure;

[0024] Figure 4 Schematic diagram of a vortex feeder with an arc-shaped flow channel plate according to the present invention;

[0025] Figure 5 Schematic diagram of the structure of the eddy current feeder of the present invention in which the flow channel plate is a single-layer flat plate;

[0026] Figure 6 Schematic diagram of the structure of the eddy current feeder with a double-layer flat plate as the flow channel plate of the present invention;

[0027] Figure 7 The slag phase trace distribution diagram of the fluid domain of the cylindrical cone structure in the embodiment of the present invention, where (a) indicates no flow plate, (b) indicates the flow plate is a curved plate, (c) indicates the flow plate is a single-layer flat plate, and (d) indicates the flow plate is a double-layer flat plate;

[0028] Figure 8 Schematic diagram of the particle phase distribution in the fluid domain of the cylindrical cone structure in the embodiment of the present invention, where (a) indicates no flow plate, (b) indicates the flow plate is an arc-shaped plate, (c) indicates the flow plate is a single-layer flat plate, and (d) indicates the flow plate is a double-layer flat plate.

[0029] Description of reference numerals:

[0030] 1. Reduction furnace; 2. Cylinder; 3. Feeding port; 4. Spiral flow channel; 41. Slag injection pipe; 42. Flow channel plate; 5. Mixing chamber; 6. Slag injection port; 7. Bottom flow port; 8. Diverter plate. DETAILED DESCRIPTION

[0031] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0032] The embodiment of the present invention provides a vortex feeder for reducing molten copper slag, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, it includes: a cylinder 2; a feeding port 3, which is opened above the cylinder 2 and is connected to the cylinder 2; a spiral flow channel 4, which is arranged inside the cylinder 2 and is connected to the inner wall of the cylinder 2, and the spiral flow channel 4 is spirally arranged downward along the inner wall of the cylinder 2; a mixing chamber 5, which is arranged inside the cylinder 2 and is connected to the spiral flow channel 4; a slag injection port 6, which is opened on the side wall of the cylinder 2 and is connected to the spiral flow channel 4; a bottom flow port 7, which is opened below the cylinder 2 and is connected to the mixing chamber 5 and the reduction furnace 1.

[0033] Exemplarily, the eddy current feeder of this embodiment is arranged inside the reduction furnace 1. The overall reduction furnace 1 is a rectangular structure, and the eddy current feeder is close to one side of the reduction furnace 1. On the one hand, it is convenient to open the slag injection port 6. The shorter the distance between the slag injection port 6 and the spiral flow channel 4, the less heat the molten copper slag itself loses, thereby avoiding the molten copper slag passing through a long path, resulting in more heat loss, which is conducive to the efficient utilization of the waste heat of the molten copper slag.

[0034] For example, the vortex feeder of this embodiment can also be arranged outside the reduction furnace 1. Through the connecting pipeline, the mixture coming out of the bottom flow port 7 of the vortex feeder enters the reduction furnace 1 for reduction reaction. Since the vortex feeder is arranged outside the reduction furnace 1, a larger reduction reaction space is left for the mixture.

[0035] For example, the inner diameter R of the cylinder 2 in this embodiment is 400 mm to 700 mm, and the height H is 1500 mm to 3000 mm. The spiral flow channel 4 is disposed within the vortex feeder, causing the molten copper slag added from the slag injection port 6 to flow downward in a spiral shape through the spiral flow channel 4 and mix with the solid powder during the downward spiral flow. The spiral flow channel 4 causes the molten copper slag to produce a swirling effect, thereby forming a negative pressure vortex, which achieves negative pressure entrainment and dispersion of the solid powder, allowing the solid powder to be rapidly dispersed and evenly distributed in the molten copper slag, thereby enhancing the mixing effect of the solid powder and the molten copper slag.

[0036] For example, Figure 7 As shown, Figure 7 The color bar on the right side of the middle represents the slag phase content in the slag phase trace. The closer the color is to red, the higher the slag phase content in the trace. In this embodiment, this means that the content of molten copper slag in the trace is higher. Figure 7 The cylinder 2 of (a) is not provided with the flow channel plate 42. Figure 7 (b)- Figure 7 (d) is provided with a flow channel plate 42. By comparison, it can be seen that the slag phase trace line with the flow channel plate 42 is obvious. The molten copper slag flows in a spiral shape in the cylinder 2. The flow channel plate 42 plays an obvious drainage role, making the molten copper slag have a significant spinning effect.

[0037] like Figure 8 As shown, Figure 8 The color bar on the right side of the image represents the particle volume fraction. The closer the color is to red, the higher the proportion of the particle phase in the particle volume. In this embodiment, this means that the content of solid powder in the particle volume is higher. Figure 8 The cylinder 2 of (a) is not provided with the flow channel plate 42. Figure 8 (b)- Figure 8 The cylinder 2 in (d) is provided with a flow channel plate 42. By comparison, it can be seen that Figure 8 In (a), since the flow channel plate 42 is not provided, the molten copper slag injected from the slag injection port 6 directly pushes the solid powder toward the inner wall of the cylinder 2 on the lower right side, which means that the dispersion effect of the solid powder is poor. The flow channel plate 42 makes the solid powder more evenly distributed. Figure 8 (b)- Figure 8 The red area in (d) is relatively evenly dispersed, indicating that the solid powder is rapidly dispersed and evenly distributed in the molten copper slag.

[0038] When the vortex feeder and the reduction furnace are installed in this embodiment, the vortex premixing of the vortex feeder, combined with the synergistic effect of side-blowing mixing in the reduction furnace, greatly enhances the reduction efficiency of the mixed material. The overall particle concentration is 2.7 times higher than that without the spiral flow channel 4, and the distribution is even. Because the spiral flow channel 4 generates vortices in the molten copper slag, the mixing time of the molten copper slag and the solid powder is extended, and the mixing time is 1.2 times that of the solid powder without the spiral flow channel 4, effectively enhancing the mixing effect of the molten copper slag and the solid powder.

[0039] The solid powder in this embodiment includes a reducing agent and a slag-forming agent. The reducing agent is solid anthracite powder with a fixed carbon content of ≥80% by mass, and the slag-forming agent is CaO. Furthermore, when the solid powder is evenly dispersed in the molten copper slag, the originally acidic molten copper slag is rapidly converted to alkaline. Specifically, the alkalinity (CaO / SiO2 ratio) of the molten copper slag is adjusted from 0.4 to a predetermined alkalinity range of 0.8 to 1.2, rapidly changing the slag shape of the molten copper slag.

[0040] In one possible embodiment, Figure 1、 Figure 2 and Figure 3 As shown, the overall structure of the cylinder 2 is a conical structure or a cylindrical conical structure.

[0041] Specifically, the overall structure of the cylinder 2 is a conical structure, and the bottom flow port 7 is arranged at the bottom of the conical structure. Due to the conical structure, the path of the molten copper slag flowing spirally downward from top to bottom along the cylinder 2 becomes shorter and shorter. As the molten copper slag flows downward in the mixing chamber 5, the flow acceleration will gradually increase, resulting in a stronger negative pressure suction effect, further increasing the uniformity of mixing between the solid powder and the molten copper slag.

[0042] Specifically, the overall structure of the barrel 2 is a cylindrical cone. That is, the portion of the barrel 2 connecting the feed port 3 to the flow plate 42 is a cylindrical structure, while the portion of the barrel 2 below the flow plate 42 to the underflow port 7 is a cone structure. This arrangement increases the mixing space between the solid powder and the molten copper slag in the cylindrical structure, thereby extending the mixing time and further improving the uniformity of the mixing between the solid powder and the molten copper slag.

[0043] In one possible embodiment, Figure 1 As shown, the spiral flow channel 4 includes: the spiral flow channel 4 includes: a slag injection pipe 41, which is arranged between the slag injection port 6 and the cylinder 2; a flow channel plate 42, which is arranged in the mixing chamber 5, and the upper end of the flow channel plate 42 is connected to the slag injection pipe 41, and the flow channel plate 42 is also connected to the inner wall of the cylinder 2; the flow channel plate 42 is spirally arranged downward along the inner wall of the cylinder 2.

[0044] For example, the slag injection pipe 41 and the flow channel plate 42 in this embodiment are integrally formed. By providing the slag injection pipe 41, the molten copper slag added from the slag injection port 6 can enter the mixing chamber 5 more quickly along the slag injection pipe 41, thereby reducing the heat loss of the molten copper slag, making more full use of the waste heat of the molten copper slag, and facilitating the reduction of the molten copper slag.

[0045] For example, the flow channel plate 42 is integrally formed with the inner wall of the cylinder 2 and spirally arranged downward along the inner wall of the cylinder 2 through the flow channel plate 42. This arrangement allows the molten copper slag added from the slag injection port 6 to enter the mixing chamber 5 along the flow channel plate 42, and the molten copper slag to achieve a swirling effect in the mixing chamber 5, thereby forming a negative pressure vortex, thereby achieving negative pressure entrainment and dispersion of the solid powder.

[0046] In a possible embodiment, along the axial direction of the cylinder 2 , the pitch of the flow channel plate 42 gradually decreases from top to bottom.

[0047] For example, as the pitch gradually decreases, the downward flow velocity of the molten copper slag in the vertical direction decreases, and the spiral flow velocity in the horizontal direction increases. On the one hand, this will increase the residence time of the molten copper slag in the mixing chamber 5, and then increase the mixing time between the molten copper slag and the solid powder, so that the molten copper slag and the solid powder are mixed more evenly; on the other hand, as the pitch gradually decreases, the number of flow channel plates 42 per unit height increases, and the molten copper slag flowing in a spiral shape along the flow channel plate 42 is easier to form a vortex, generating a stronger negative pressure suction effect, so that the solid powder is better dispersed in the molten copper slag.

[0048] In one possible embodiment, Figure 1 、 Figure 4 、 Figure 5 and Figure 6 As shown, the flow channel plate 42 is any one of an arc-shaped plate, a single-layer flat plate or a double-layer flat plate.

[0049] Specifically, if Figure 4 As shown, the flow channel plate 42 of this embodiment is an arc-shaped plate, and the concave surface of the arc-shaped plate faces the mixing chamber 5. Along the width direction of the arc-shaped plate, the two ends of the concave surface of the arc-shaped plate are integrally connected to the inner wall of the cylinder 2. The distance between the two ends of the concave surface of the arc-shaped plate in this embodiment can be equidistant or unequal (i.e., variable diameter). For example, in the case of unequal distance, as the flow channel plate 42 is spirally arranged downward, from top to bottom, the distance between the two ends of the concave surface of the arc-shaped plate gradually decreases. With this arrangement, the flow process of the molten copper slag is affected by the gradual narrowing of the arc-shaped plate. The molten copper slag injected from the slag injection pipe 41 will gradually accelerate in the process of flowing along the flow channel plate 42, and because the pitch of the flow channel plate 42 gradually decreases from top to bottom, the flow speed of the molten copper slag in the horizontal direction increases. Therefore, it is more conducive to the molten copper slag to form a high-speed vortex in the mixing chamber 5, further promoting the mixing and diffusion between the molten copper slag and the solid powder.

[0050] Specifically, if Figure 5As shown, the flow channel plate 42 of this embodiment is a single-layer flat plate. The single-layer flat plate is in the shape of a long strip and spirally arranged downward along the inner wall of the vortex feeder. The end of the single-layer flat plate connected to the slag injection pipe 41 is connected to the lower edge of the discharge end of the slag injection pipe 41, facilitating the flow of molten copper slag added from the slag injection pipe 41 on the single-layer flat plate. The vortex feeder of this embodiment is arranged perpendicular to the ground, so the inner wall of the vortex feeder is also perpendicular to the ground. The single-layer flat plate and the inner wall of the vortex feeder can be arranged perpendicular to each other or at a certain angle, which is 60° to 120°. The size of this angle is determined by the injection speed of the molten copper slag. The greater the injection speed, the larger the angle. Because the greater the injection speed of the molten copper slag, the greater the speed of the molten copper slag in the horizontal direction when it spirals downward, the corresponding centrifugal force is greater, making it difficult for the molten copper slag to flow vertically downward along the single-layer flat plate. Therefore, in this case, the angle can be relatively large, that is, the single-layer flat plate is tilted downward relative to the inner wall of the vortex feeder.

[0051] For example, since the molten copper slag is injected horizontally when entering the slag injection pipe 41, and the molten copper slag is affected by downward gravity during its flow, the molten copper slag flows downward in a spiral along the flow channel plate 42. From top to bottom, as the flow channel plate 42 spirals downward, the width of the single-layer flat plate gradually increases. With this arrangement, as the molten copper slag spirals downward along the flow channel plate 42, the support provided by the single-layer flat plate to the molten copper slag gradually increases. Correspondingly, the flow time and flow speed of the molten copper slag in the horizontal direction are both increased, which is more conducive to the molten copper slag forming a high-speed vortex in the mixing chamber 5, promoting the mixing and diffusion between the molten copper slag and the solid powder.

[0052] Specifically, if Figure 6As shown, the flow channel plate 42 of this embodiment is a double-layer flat plate, which is divided into an upper flat plate and a lower flat plate. The shape and structure of the upper flat plate and the lower flat plate are exactly the same. Among them, the lower flat plate is connected to the lower edge of the discharge end of the slag injection pipe 41, and the upper flat plate is connected to the middle part of the discharge end of the slag injection pipe 41. This arrangement allows the molten copper slag to enter the mixing chamber 5 from the slag injection pipe 41 in two layers, flowing along the upper flat plate and the lower flat plate respectively. The setting principle is the same as that of the above-mentioned single-layer flat plate. The upper flat plate, the lower flat plate and the inner wall of the vortex feeder can be set perpendicular to each other, or there can be a certain angle between them, and the angle is also 60° to 120°. The specific setting angle between the double-layer flat plate and the inner wall of the vortex feeder is determined according to the actual situation. The setting principle of the angle is the same as that of the single-layer flat plate, and will not be repeated here. The double-layer flat plate also diverts the molten copper slag by arranging a diverter plate 8 inside the slag injection pipe 41. The diverter plate 8 is thinner at the end facing the slag injection port 6, and thicker at the end facing the flow channel plate 42. After the molten copper slag is diverted by the diverter plate 8, a high-speed double-layer vortex is formed. Due to gravity, the flow velocity of the molten copper slag below the diverter plate 8 is greater than that above the diverter plate 8, resulting in double-layer differentiated flow rate-induced turbulence and shear stress, which further promotes the mixing and diffusion between the molten copper slag and the solid powder.

[0053] In one possible embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the diameter of the slag injection pipe 41 gradually decreases from the slag injection port 6 to the flow channel plate 42.

[0054] For example, Figure 1 、 Figure 2 and Figure 3 As shown, the end of the slag injection pipe 41 with a larger diameter faces outward, and the end with a smaller diameter faces the internal mixing chamber 5. By gradually reducing the diameter of the slag injection pipe 41, it is beneficial to increase the injection speed and injection pressure of the molten copper slag after passing through the slag injection pipe 41, which is more conducive to the formation of a high-speed vortex of the molten copper slag in the mixing chamber 5.

[0055] In one possible embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, the angle between the side wall of the slag injection pipe 41 and the axial line of the slag injection pipe 41 is 8° to 20°.

[0056] For example, by setting the above-mentioned angle, the slag injection pipe 41 is made to have a gradually shrinking structure along with the injection direction of the molten copper slag, i.e., a tapered slag injection pipe 41. This setting can increase the injection speed and injection pressure of the molten copper slag in the process of passing through the tapered slag injection pipe 41, thereby being more conducive to the formation of a high-speed vortex of the molten copper slag in the mixing chamber 5. If the angle is too small, i.e., less than 8°, the tube diameter does not change much, and the changes in the injection speed and injection pressure of the molten copper slag are very small; if the angle is too large, i.e., greater than 20°, the tube diameter changes too much, and the molten copper slag is more likely to change greatly between the inlet and the outlet, resulting in increased flow resistance, which in turn reduces the flow speed.

[0057] In a possible embodiment, the barrel 2 , the slag injection pipe 41 and the flow channel plate 42 are made of graphite or a magnesium-carbon composite material.

[0058] For example, graphite and magnesium-carbon composite materials are both suitable for high temperatures, can meet the high-temperature use requirements of molten copper slag, have strong resistance to slag erosion, and have an extremely low thermal expansion coefficient, ensuring the high-temperature use strength of the vortex feeder. Therefore, the materials of the cylinder 2, the slag injection pipe 41 and the flow channel plate 42 are all graphite or magnesium-carbon composite materials, which extends the overall service life of the vortex feeder.

[0059] In one possible embodiment, Figure 1 As shown, the pitch of the flow channel plate 42 is 200 mm to 800 mm.

[0060] For example, the pitch of this embodiment is represented by P, and P is 400 mm. When the pitch P is less than 200 mm, the length of the flow channel plate 42 increases, and the time for the molten copper slag to flow along the flow channel plate 42 increases, so that the residual heat loss of the molten copper slag is relatively large. When the pitch P is greater than 800 mm, the length of the flow channel plate 42 is shortened, so that the path for the molten copper slag to flow downward in the mixing chamber 5 is relatively short, the suction vortex is incomplete, and the negative pressure suction effect is relatively small, which easily leads to poor mixing effect of the solid powder and the molten copper slag.

[0061] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0062] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0063] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A vortex feeder for reducing molten copper slag, characterized in that: include: Cylinder; A feeding port is provided above the cylinder and is in communication with the cylinder; A spiral flow channel is provided inside the cylinder and connected to the inner wall of the cylinder, and the spiral flow channel is spirally provided downward along the inner wall of the cylinder; a mixing chamber, disposed inside the cylinder and communicated with the spiral flow channel; A slag injection port is provided on the side wall of the cylinder and is connected to the spiral flow channel; A bottom flow port is provided below the cylinder and is in communication with the mixing chamber and the reduction furnace; The spiral flow channel comprises: A slag injection pipe is provided between the slag injection port and the cylinder; A flow channel plate is provided in the mixing chamber, wherein the upper end of the flow channel plate is connected to the slag injection pipe, and the flow channel plate is also connected to the inner wall of the cylinder; The flow channel plate is spirally arranged downward along the inner wall of the cylinder; Along the axial direction of the cylinder, the pitch of the flow channel plate gradually decreases from top to bottom.

2. The eddy current feeder for reducing molten copper slag according to claim 1, characterized in that: The overall structure of the cylinder is a conical structure or a cylindrical conical structure.

3. The eddy current feeder for reducing molten copper slag according to claim 1, characterized in that: The flow channel plate is any one of an arc-shaped plate, a single-layer flat plate or a double-layer flat plate.

4. The eddy current feeder for reducing molten copper slag according to claim 1, characterized in that: The diameter of the slag injection pipe gradually decreases from the slag injection port to the runner plate.

5. The eddy current feeder for reducing molten copper slag according to claim 4, characterized in that: The angle between the side wall of the slag injection pipe and the axial line of the slag injection pipe is 8°~20°.

6. The vortex feeder for reducing molten copper slag according to claim 1, characterized in that: The barrel, the slag injection pipe and the flow channel plate are made of graphite or magnesium-carbon composite material.

7. The vortex feeder for reducing molten copper slag according to claim 1, characterized in that: The pitch of the flow channel plate is 200 mm to 800 mm.

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