Furnace tube device and reduction furnace with same

Abstract

The invention relates to the technical field of metal smelting reduction equipment, and discloses a furnace tube device and a reduction furnace with the same. The furnace tube device comprises: a furnace tube body, the diameter of the inner cavity of which is not less than 160mm; the baffle assembly is installed in the inner cavity of the furnace tube body and comprises a fixed baffle and a loose-leaf baffle, the fixed baffle is connected with the inner wall of the furnace tube body in a matched mode, the loose-leaf baffle is rotationally connected with the fixed baffle, and an anti-clamping gap is reserved between the loose-leaf baffle and the inner wall of the furnace tube body. After the diameter of the inner cavity of the furnace tube body is increased, the baffle assembly is installed in a matched mode, and the inner cavity of the furnace tube body is locally shielded through cooperation of the fixed baffle and the loose-leaf baffle, so that it is guaranteed that no air flows into the furnace tube body to cause blasting when the furnace tube body is opened; and the opening of the furnace tube body can still be opened under the condition of ensuring safety, and a boat with a larger volume is conveyed through the furnace tube body, so that the ultra-coarse tungsten powder with the Fisher particle size of more than or equal to 30 microns is produced.

Description

Technical Field

[0001] The invention relates to the technical field of metal smelting reduction equipment, and in particular to a furnace tube device and a reduction furnace having the same. Background Art

[0002] As an important strategic metal material, tungsten is widely used in electronics, aviation, metallurgy, machinery, military and other fields. Tungsten powder is a crucial intermediate product in the tungsten smelting process, and its quality directly affects the performance and use effect of the final product. At present, in the production process of tungsten powder, the reduction furnace, as the core equipment, is widely used in the reduction reaction of tungsten ore to reduce tungsten concentrate to tungsten powder. According to the number of furnace tubes, the multi-tube reduction furnace can be divided into four-tube reduction furnace, fourteen-tube reduction furnace, fifteen-tube reduction furnace and eighteen-tube reduction furnace.

[0003] The multi-tube reduction furnace is usually composed of a feed end, a furnace body, a discharge end, a hydrogen bus, a hydrogen leaching device, etc. There are multiple furnace tubes in the furnace body. When the furnace tube is opened, air will enter the reduction furnace when the furnace tube is larger in diameter, affecting the product quality. Therefore, the conventional diameter of the furnace tube of the reduction furnace in the prior art generally does not exceed 144mm. The furnace tube is the main space where the reduction reaction occurs. Hydrogen enters the furnace tube through the hydrogen bus and reacts with the tungsten ore to generate tungsten powder. Each furnace tube is equipped with a boat to accommodate the tungsten ore and achieve uniform heating and reaction.

[0004] In the existing multi-tube reduction furnace, although the furnace tube diameter of 144mm can meet the general production needs, the small diameter of the furnace tube leads to limited loading capacity of the internal boat. In order to achieve a larger tungsten powder output and higher particle size requirements, a larger boat needs to be used in the production process. However, due to the limitations of the existing furnace tube design, the smaller furnace tube diameter cannot effectively accommodate a larger boat, resulting in the boat loading capacity unable to meet the production needs of ultra-coarse tungsten powder with a Fisher particle size greater than or equal to 25μm. This limits the application of multi-tube reduction furnaces in the production of ultra-coarse tungsten powder, affecting its production efficiency and product quality. Summary of the invention

[0005] In view of this, the present invention provides a furnace tube device and a reduction furnace having the same, so as to solve the problem that the inner diameter of the tube of the reduction furnace in the prior art is small and ultra-coarse tungsten powder cannot be produced.

[0006] In a first aspect, the present invention provides a furnace tube device, comprising:

[0007] The diameter of the inner cavity of the furnace tube body shall not be less than 160mm;

[0008] A baffle assembly is installed in the inner cavity of the furnace tube body, and the baffle assembly includes a fixed baffle and a loose-leaf baffle. The fixed baffle is cooperatively connected to the inner wall of the furnace tube body, and the loose-leaf baffle is rotatably connected to the fixed baffle. The loose-leaf baffle has a closed state perpendicular to the axis of the furnace tube body, and an open state rotated to be parallel to the axis of the furnace tube body. An anti-stuck gap is reserved between the loose-leaf baffle and the inner wall of the furnace tube body.

[0009] The furnace tube body is used to be installed on a reduction furnace. When the inner diameter of the furnace tube body is too large, when the furnace tube body is opened, air may flow into the furnace body from the furnace tube body, affecting the product quality. When the boat is transported into the furnace tube body provided by the present invention, when the boat is carried into the inner cavity of the furnace tube body by a manipulator or other tools, the inner cavity diameter of the furnace tube body is increased so that the furnace tube body can accommodate a larger boat to increase the loading capacity of the internal boat. When the boat enters the inner cavity of the furnace tube body, the movable baffle is pushed open so that the movable baffle rotates from a closed state to an open state, so that the boat can pass smoothly. At this time, the fixed baffle still blocks part of the furnace tube body to reduce the amount of gas passing through the furnace tube body, and prevents the air from pouring into the furnace body from the thicker furnace tube body when the boat enters and exits the furnace tube body, which may cause danger. The furnace tube device increases the inner cavity diameter of the furnace tube body and then installs a baffle assembly. The inner cavity of the furnace tube body is partially shielded by the fixed baffle and the movable baffle, ensuring that no air will flow into the opening of the furnace tube body to cause explosions when a large-volume boat is transported through the furnace tube body. After the inner cavity diameter of the furnace tube body is increased, the opening of the furnace tube body can still be opened under the condition of ensuring safety, and a larger-volume boat can be transported into the reduction furnace through the furnace tube body, thereby producing ultra-coarse tungsten powder with a Fisher particle size greater than or equal to 30μm.

[0010] In an optional embodiment, the cross-section of the inner cavity of the furnace tube body perpendicular to the axial direction is circular, and the coverage area of ​​the fixed baffle is no more than half of the inner cavity interface of the furnace tube body. The inner cavity structure with a circular cross-section avoids airflow dead zones that may be caused by corners and irregular structures, which helps to stabilize the gas flow, thereby promoting uniform reduction of tungsten ore and improving reaction efficiency. At the same time, when the reduction furnace is working, the thermal expansion and contraction of the inner cavity of the furnace tube body with a circular cross-section is more uniform, avoiding damage to the furnace tube body due to the excessive size of the furnace tube body and the local stress concentration inside.

[0011] In an optional embodiment, the fixed baffle is a minor arc arch plate, and the arc edge of the fixed baffle is arranged in close contact with the inner side wall of the furnace tube body, which can better cooperate closely with the inner wall of the furnace tube body, provide a good barrier effect, and prevent air from entering the reduction furnace from the furnace tube body. The loose-leaf baffle is a major arc arch plate, and the straight edge of the loose-leaf baffle is rotatably connected with the straight edge of the fixed baffle, and the maximum diameter of the loose-leaf baffle is not greater than the width of the straight edge of the fixed baffle. Ensure that the loose-leaf baffle can rotate smoothly without obstruction, thereby avoiding production interruption or uneven airflow caused by baffle obstruction.

[0012] In an optional embodiment, the difference between the inner diameter of the furnace tube body and the straight edge width of the fixed baffle is no more than 20 mm, and the width of the anti-stuck gap is no less than half of the difference between the inner diameter of the furnace tube body and the straight edge width of the fixed baffle.

[0013] In an optional embodiment, the fixed baffle is a piece of magnetic material, and the fixed baffle is magnetically connected to the inner wall of the furnace tube body. The use of magnetic material allows the fixed baffle to be quickly and firmly adsorbed to the inner wall of the furnace tube without the need for traditional mechanical connection methods, thereby reducing assembly time and simplifying the complexity of the installation operation of the fixed baffle inside the furnace tube body. When the baffle position needs to be adjusted or replaced, it can be easily achieved without disassembling complex components, thereby improving the convenience of maintenance and operation. Moreover, the magnetic connection avoids the problem of material fatigue or damage that may be caused by traditional connection methods, ensuring the stability and long-term use of the fixed baffle in high temperature environments.

[0014] In an optional embodiment, the movable baffle is a magnetic material piece, and the magnetism of a side of the movable baffle facing the inner side of the furnace tube body is the same as the magnetism of a side of the fixed baffle facing the inner side of the furnace tube body.

[0015] In an optional embodiment, the fixed baffle is installed on the top of the furnace tube body, and the loose-leaf baffle is arranged horizontally relative to the rotating shaft of the fixed baffle. After the external force for opening the loose-leaf baffle is removed, the loose-leaf baffle can automatically switch from an open state to a closed state under the action of its own gravity, simplifying the difficulty of switching between the open state and the closed state of the loose-leaf baffle, and ensuring the smoothness of the loose-leaf baffle's movement inside the furnace tube body.

[0016] In an optional embodiment, the diameter of the inner cavity of the furnace tube body is not greater than 250 mm.

[0017] In an optional embodiment, a furnace cover assembly is installed at the inlet end of the furnace tube body, which is used to close the inlet end of the furnace tube body when the reduction furnace is working, thereby avoiding gas exchange between the inside of the reduction furnace and the external environment, and ensuring the safety and stability of the reduction furnace operation.

[0018] In a second aspect, the present invention further provides a reduction furnace having the furnace tube device of the present invention. Since the reduction furnace includes the furnace tube device, it has the same effect as the furnace tube device, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic structural diagram of the cooperation between the furnace tube device and the boat provided in the embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the internal structure of the furnace tube device provided in an embodiment of the present invention.

[0022] Figure 3 It is a side cross-sectional view of a furnace tube device provided in an embodiment of the present invention.

[0023] Explanation of the accompanying drawings: 1. furnace tube body; 2. fixed baffle; 3. loose-leaf baffle; 4. anti-stuck gap; 5. furnace cover assembly; 6. boat. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] Combine the following Figures 1 to 3 , describing an embodiment of the present invention.

[0026] According to an embodiment of the present invention, on the one hand, a furnace tube device is provided, including a furnace tube body 1 , a baffle assembly and a furnace cover assembly 5 .

[0027] The inner cavity diameter of the furnace tube body 1 provided in this embodiment is not less than 160 mm, and generally the inner cavity diameter of the furnace tube body 1 is not greater than 250 mm. If there are special needs in production, the inner cavity diameter of the furnace tube body 1 can be expanded to more than 250 mm, and the baffle assembly can be expanded in proportion. The baffle assembly is installed in the inner cavity of the furnace tube body 1, and the baffle assembly includes a fixed baffle 2 and a loose-leaf baffle 3. The fixed baffle 2 is connected to the inner wall of the furnace tube body 1, and the loose-leaf baffle 3 is rotatably connected to the fixed baffle 2. The loose-leaf baffle 3 has a closed state perpendicular to the axis of the furnace tube body 1, and rotates to an open state parallel to the axis of the furnace tube body 1. An anti-stuck gap 4 is reserved between the loose-leaf baffle 3 and the inner wall of the furnace tube body 1 to prevent the loose-leaf baffle 3 from being blocked by the inner wall of the furnace tube body 1 when it rotates freely between the closed state and the open state.

[0028] The furnace tube body 1 is used to be installed on a reduction furnace. When the inner diameter of the furnace tube body 1 is too large, when the furnace tube body 1 is opened, air may flow into the furnace body from the furnace tube body 1, affecting the product quality. When the boat 6 is transported into the furnace tube body 1 provided by the present invention, when the boat 6 is carried into the inner cavity of the furnace tube body 1 by a manipulator or other tools, the inner cavity diameter of the furnace tube body 1 is increased so that the furnace tube body 1 can accommodate a larger boat 6 to increase the loading capacity of the internal boat 6. In the process of the boat 6 entering the inner cavity of the furnace tube body 1, the movable baffle 3 is pushed open so that the movable baffle 3 is rotated from a closed state to an open state, so that the boat 6 can pass smoothly. At this time, the fixed baffle 2 still blocks a part of the furnace tube body 1 to reduce the amount of gas passing through the furnace tube body 1, and prevents the air from pouring into the furnace body from the thicker furnace tube body 1 when the boat 6 enters and exits the furnace tube body 1, which may cause danger. The furnace tube device increases the inner cavity diameter of the furnace tube body 1 and then installs a baffle assembly. The fixed baffle 2 and the loose-leaf baffle 3 cooperate to partially shield the inner cavity of the furnace tube body 1, ensuring that no air will flow into the opening of the furnace tube body 1 to cause explosions when a large-volume boat 6 is transported through the furnace tube body 1. After the inner cavity diameter of the furnace tube body 1 is increased, the opening of the furnace tube body 1 can still be opened while ensuring safety, and a larger-volume boat 6 can be transported into the reduction furnace through the furnace tube body 1, thereby producing ultra-coarse tungsten powder with a Fisher particle size greater than or equal to 35μm.

[0029] The fixed baffle 2 is arranged along the inner side wall of the furnace tube body 1 to reduce the effective inner diameter of the furnace tube body 1 through which gas can pass to a certain extent, and is used to install a movable baffle 3 that can be opened and closed and rotated inside the furnace tube body 1. The shape of the movable baffle 3 can be any shape, as long as the movable baffle 3 can be freely rotated between the closed state and the open state without being blocked by the inner wall of the furnace tube body 1.

[0030] In one embodiment, the furnace tube body 1 is formed by casting, and the cross section of the inner cavity of the furnace tube body 1 perpendicular to the axial direction is circular, and the coverage area of ​​the fixed baffle 2 is no more than half of the inner cavity interface of the furnace tube body 1. The inner cavity structure with a circular cross section avoids the dead zone of airflow that may be caused by corners and irregular structures, which helps the smoothness of gas flow, thereby promoting the uniform reduction of tungsten ore and improving reaction efficiency. At the same time, when the reduction furnace is working, the thermal expansion and contraction of various parts of the furnace tube body 1 with a circular cross section are more uniform, avoiding damage to the furnace tube body 1 due to the excessive size of the furnace tube body 1 and the local stress concentration inside.

[0031] In this embodiment, the fixed baffle 2 is a minor arc arch plate, and the arc edge of the fixed baffle 2 is arranged in close contact with the inner side wall of the furnace tube body 1, which can better cooperate closely with the inner wall of the furnace tube body 1, provide a good barrier effect, and prevent air from entering the reduction furnace from the furnace tube body 1. The loose-leaf baffle 3 is a major arc arch plate, and the straight edge of the loose-leaf baffle 3 is rotatably connected with the straight edge of the fixed baffle 2, and the maximum diameter of the loose-leaf baffle 3 is not greater than the straight edge width of the fixed baffle 2. It is ensured that the loose-leaf baffle 3 can rotate smoothly without being blocked, thereby avoiding production interruption or uneven airflow caused by baffle jamming.

[0032] Furthermore, the difference between the inner diameter of the furnace tube body 1 and the straight edge width of the fixed baffle 2 is not greater than 20 mm, and the width of the anti-stuck gap 4 is not less than half of the difference between the inner diameter of the furnace tube body 1 and the straight edge width of the fixed baffle 2.

[0033] Specifically, in this embodiment, the inner diameter of the furnace tube body 1 is 180 mm, the straight side length of the fixed baffle 2 is 160 mm, the straight side length of the loose-leaf baffle 3 is 140 mm, the maximum diameter of the loose-leaf baffle 3 is 160 mm, and the loose-leaf baffle 3 and the fixed baffle 2 are both centrally arranged, so that the anti-stuck gap 4 around the loose-leaf baffle 3 is 10 mm.

[0034] In one embodiment, the fixed baffle 2 is a magnetic material, and the fixed baffle 2 is magnetically connected to the inner wall of the furnace tube body 1. The use of magnetic material enables the fixed baffle 2 to be quickly and firmly adsorbed to the inner wall of the furnace tube without the need for traditional mechanical connection methods, thereby reducing assembly time and simplifying the complexity of the installation operation of the fixed baffle 2 inside the furnace tube body 1. When the baffle position needs to be adjusted or replaced, it can be easily achieved without disassembling complex components, thereby improving the convenience of maintenance and operation. Moreover, the magnetic connection avoids the problem of material fatigue or damage that may be caused by traditional connection methods, ensuring the stability and long-term use of the fixed baffle 2 in high temperature environments.

[0035] In this embodiment, the hinged baffle 3 is a magnetic material, and the magnetism of the side of the hinged baffle 3 facing the inner side of the furnace tube body 1 is the same as the magnetism of the side of the fixed baffle 2 facing the inner side of the furnace tube body 1. In some other embodiments, the hinged baffle 3 can also be made of heat-resistant metal material or heat-resistant ceramic material.

[0036] In one embodiment, the fixed baffle 2 is installed on the top of the furnace tube body 1, and the loose-leaf baffle 3 is arranged horizontally relative to the rotating shaft of the fixed baffle 2. The boat enters the furnace tube body under the drive of the manipulator or other external clamping equipment, and after the loose-leaf baffle 3 is pushed open, the boat can be sent to the furnace tube body. After the boat is transported to the right position, the manipulator or other external clamping equipment is withdrawn, so that the external force for pushing the loose-leaf baffle 3 is cancelled, and the loose-leaf baffle 3 can automatically switch from the open state to the closed state under the action of its own gravity, simplifying the difficulty of switching between the open state and the closed state of the loose-leaf baffle 3, and ensuring the smoothness of the loose-leaf baffle 3 in the furnace tube body 1.

[0037] In some other embodiments, the fixed baffle 2 can also be arranged on one side of the inner cavity of the furnace tube body 1, and the loose-leaf baffle 3 is arranged vertically or obliquely relative to the rotating shaft of the fixed baffle 2. When the boat 6 is transported through the furnace tube body 1, the manipulator or external equipment clamps the boat 6 and enters the inner cavity of the furnace tube body 1. When passing through the loose-leaf baffle 3, the loose-leaf baffle 3 is pushed open by the manipulator or the external clamping equipment, thereby switching from a closed state to an open state. After the manipulator or the external clamping equipment is withdrawn, the loose-leaf baffle 3 is driven by the manipulator to switch from an open state to a closed state under the action of the gas inside the furnace tube body 1 or when the manipulator is withdrawn. In order to ensure that the loose-leaf baffle 3 does not go beyond the position of the closed state, a block can be arranged on the rotating shaft between the loose-leaf baffle 3 and the fixed baffle 2 to limit the rotation range of the loose-leaf baffle 3, or a biasing member such as a torsion spring or a tension spring can be arranged, so that the loose-leaf baffle 3 rotates and can return to the position of the closed state under the action of the biasing force applied by the biasing member after the external force is removed.

[0038] In one embodiment, a furnace cover assembly 5 is installed at the inlet end of the furnace tube body 1, which is used to close the inlet end of the furnace tube body 1 when the reduction furnace is working, to avoid gas exchange between the inside of the reduction furnace and the external environment, and to ensure the safety and stability of the reduction furnace operation.

[0039] According to an embodiment of the present invention, on the other hand, a reduction furnace is provided, which has a furnace tube device of the present invention. By installing the furnace tube device, the inner diameter of the furnace tube body 1 exceeds 160 mm, and a larger boat 6 can be accommodated. Moreover, by installing a baffle assembly, the defect that the furnace tube body 1 is easy to enter the air when the large-sized furnace tube body 1 is transported in and out of the boat 6 is solved. At the same time, multiple furnace tube devices can be installed in parallel on the reduction furnace to perform the reduction work of multiple products at the same time, thereby improving production efficiency.

[0040] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A furnace tube device, characterized in that: include: The furnace tube body (1) has an inner cavity with a diameter of not less than 160 mm; A baffle assembly is installed in the inner cavity of the furnace tube body (1), the baffle assembly comprises a fixed baffle (2) and a loose-leaf baffle (3), the fixed baffle (2) is cooperatively connected to the inner wall of the furnace tube body (1), the loose-leaf baffle (3) is rotatably connected to the fixed baffle (2), the loose-leaf baffle (3) has a closed state perpendicular to the axis of the furnace tube body (1), and an open state rotated to be parallel to the axis of the furnace tube body (1), and an anti-stuck gap (4) is reserved between the loose-leaf baffle (3) and the inner wall of the furnace tube body (1).

2. The furnace tube device according to claim 1, characterized in that: The cross section of the inner cavity of the furnace tube body (1) perpendicular to the axial direction is circular, and the coverage area of ​​the fixed baffle (2) is no greater than half of the inner cavity interface of the furnace tube body (1).

3. The furnace tube device according to claim 2, characterized in that: The fixed baffle (2) is a minor arc arch plate, the arc edge of the fixed baffle (2) is arranged in close contact with the inner side wall of the furnace tube body (1), the loose-leaf baffle (3) is a major arc arch plate, the straight edge of the loose-leaf baffle (3) is rotatably connected with the straight edge of the fixed baffle (2), and the maximum diameter of the loose-leaf baffle (3) is not greater than the width of the straight edge of the fixed baffle (2).

4. The furnace tube device according to claim 3, characterized in that: The difference between the inner diameter of the furnace tube body (1) and the straight edge width of the fixed baffle (2) is not greater than 20 mm, and the width of the anti-stuck gap (4) is not less than half of the difference between the inner diameter of the furnace tube body (1) and the straight edge width of the fixed baffle (2).

5. The furnace tube device according to any one of claims 1 to 4, characterized in that: The fixed baffle (2) is made of a magnetic material, and the fixed baffle (2) is magnetically connected to the inner side wall of the furnace tube body (1).

6. The furnace tube device according to claim 5, characterized in that: The movable baffle (3) is made of magnetic material, and the magnetism of a side of the movable baffle (3) facing the inner side of the furnace tube body (1) is the same as the magnetism of a side of the fixed baffle (2) facing the inner side of the furnace tube body (1).

7. The furnace tube device according to any one of claims 1 to 3, characterized in that: The fixed baffle (2) is installed on the top of the furnace tube body (1), and the loose-leaf baffle (3) is arranged horizontally relative to the rotating shaft of the fixed baffle (2).

8. The furnace tube device according to any one of claims 1 to 3, characterized in that: The diameter of the inner cavity of the furnace tube body (1) is not greater than 250 mm.

9. The furnace tube device according to any one of claims 1 to 3, characterized in that: A furnace cover assembly (5) is installed at the inlet end of the furnace tube body (1).

10. A reduction furnace, characterized in that: A furnace tube device according to any one of claims 1 to 9.

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