Special crucible for vanadium-nitrogen alloy production

Abstract

The utility model discloses a special crucible for vanadium-nitrogen alloy production, which relates to the technical field of vanadium-nitrogen alloy production, and particularly comprises a first heat insulation sleeve, a second heat insulation sleeve and a crucible body, and the first heat insulation sleeve is connected with the second heat insulation sleeve through a connecting rod; the crucible body comprises a moving part, a first fixing part and a second fixing part, the moving part is movably connected with an inner cavity of the first heat insulation sleeve or an inner cavity of the second heat insulation sleeve, and the moving part is connected with the first heat insulation sleeve through a hydraulic telescopic rod. According to the crucible special for vanadium-nitrogen alloy production, different crucible bodies can form the crucible with the first fixing part and the second fixing part, so that the energy loss of the crucible is reduced in the vanadium-nitrogen alloy production process, and the purpose of reducing energy consumption is achieved; and the temperature of the crucible can quickly reach the heating temperature or the cooling temperature, so that materials in the crucible can be quickly heated or cooled, and the production efficiency of the vanadium-nitrogen alloy is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vanadium-nitrogen alloy production, in particular to a special crucible for vanadium-nitrogen alloy production. Background Art

[0002] Vanadium-nitrogen alloy is a high-quality steelmaking additive that significantly enhances and improves the overall mechanical and weldability of steel. Compared to using ferrovanadium, it can save 30%-40% of vanadium resources. Therefore, vanadium-nitrogen alloy is a high-value-added product that is gradually replacing ferrovanadium and has a promising market prospect. Currently, the mainstream sintering equipment for vanadium-nitrogen alloy production is the double-pusher kiln. This double-pusher kiln technology enables a one-step atmospheric pressure synthesis of vanadium nitride. The production process involves pulverizing and mixing vanadium pentoxide, a binder, and activated carbon. Then, the pellets are pressed into a graphite canister, placed on pusher plates, and continuously fed into the pusher kiln. Nitrogen is continuously introduced into the kiln chamber. The pellets are dried in the auxiliary kiln drying section (40°C) before entering the main kiln. They pass through a preheating section (200-650°C), a high-temperature section (650-1500°C), and a cooling section (80-100°C), completing the reduction, carbonization, and nitridation reactions in a single step within the kiln to produce vanadium nitride. During this process, the crucible needs to consume energy to heat up in the preheating section and the high-temperature section, and the crucible needs to consume energy to cool down in the cooling section, which increases the production energy consumption of vanadium-nitrogen alloy and reduces the production efficiency of vanadium-nitrogen alloy. Based on this, the present application proposes a special crucible for vanadium-nitrogen alloy production. Utility Model Content

[0003] The utility model provides a special crucible for vanadium-nitrogen alloy production, which solves the problem in the above background technology that the crucible temperature needs to change with the external temperature, which increases the energy consumption of vanadium-nitrogen alloy production and reduces the production efficiency of vanadium-nitrogen alloy.

[0004] The utility model provides the following technical solution: a special crucible for vanadium-nitrogen alloy production, comprising a first thermal insulation sleeve, a second thermal insulation sleeve and a crucible body, wherein the first thermal insulation sleeve and the second thermal insulation sleeve are connected by a connecting rod; the crucible body comprises a movable portion, a first fixed portion and a second fixed portion, the movable portion is movably connected to the inner cavity of the first thermal insulation sleeve or the second thermal insulation sleeve, the movable portion is connected to the first thermal insulation sleeve via a hydraulic telescopic rod, the first fixed portion and the second fixed portion are both sealed to the movable portion via a sealing strip, the first fixed portion is fixedly connected to the first thermal insulation sleeve, and the second fixed portion is fixedly connected to the second thermal insulation sleeve;

[0005] The moving part comprises two crucible bodies, the two crucible bodies are connected by a heat insulation strip, and the crucible body is connected to the hydraulic telescopic rod by another heat insulation strip.

[0006] Preferably, a side of the fixing portion 1 away from the first thermal insulation sleeve and a side of the fixing portion 2 away from the second thermal insulation sleeve are both fixedly connected with a sealing strip.

[0007] Preferably, the movable part is a U-shaped structure, the top of the horizontal end of the movable part contacts the bottom of both the fixed part one and the fixed part two, and the inner side wall of the vertical end of the movable part contacts the vertical ends of both the fixed part one and the fixed part two.

[0008] Preferably, the sealing strip is a U-shaped structure, the bottom of the sealing strip contacts the top of the horizontal end of the moving part, and the vertical end of the sealing strip contacts the inner wall of the vertical end of the moving part.

[0009] Preferably, there is a gap between the inner side wall of the connecting rod and the moving part.

[0010] Preferably, the width of the crucible body is the same as the distance between the first thermal insulation sleeve and the second thermal insulation sleeve.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The crucible is specially designed for the production of vanadium-nitrogen alloy. Different crucible bodies can form a crucible with the fixing part 1 and the fixing part 2, so that the energy loss of the crucible is reduced during the production process of vanadium-nitrogen alloy, thereby achieving the purpose of reducing energy consumption; the temperature of the crucible can quickly reach the heating temperature or the cooling temperature, so that the material in the crucible can be quickly heated or cooled, thereby improving the production efficiency of vanadium-nitrogen alloy.

[0013] 2. The crucible specially used for the production of vanadium-nitrogen alloy can block the heat transfer between the two crucible bodies or between the hydraulic telescopic rod and the crucible body by setting the thermal insulation strip, thereby reducing heat loss. The first thermal insulation sleeve and the second thermal insulation sleeve can protect the crucible body located in its inner cavity, thereby reducing the heat loss of the crucible body. When the crucible body is in use, the crucible can quickly reach the set temperature, thereby facilitating the production of vanadium-nitrogen alloy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the structure of the utility model;

[0015] Figure 2 For the utility model structure Figure 1 Schematic diagram on the back;

[0016] Figure 3 For the utility model structure Figure 1 Schematic diagram looking up;

[0017] Figure 4 For the utility model structure Figure 1 Explosion diagram;

[0018] Figure 5 This is a cross-sectional schematic diagram of the first thermal insulation sleeve of the utility model structure.

[0019] In the figure: 1. First thermal insulation sleeve; 2. Hydraulic telescopic rod; 3. Fixing part 1; 4. Crucible body; 5. Sealing strip; 6. Fixing part 2; 7. Second thermal insulation sleeve; 8. Connecting rod; 9. Thermal insulation strip. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The utility model provides a crucible specifically for the production of vanadium-nitrogen alloys, comprising a first thermal insulation sleeve 1, a second thermal insulation sleeve 7, and a crucible body. The crucible body comprises a movable portion, a fixed portion 1 3, and a fixed portion 2 6. The first thermal insulation sleeve 1 and the second thermal insulation sleeve 7 are connected by a connecting rod 8. The first thermal insulation sleeve 1 and the second thermal insulation sleeve 7 are both hollow structures. The movable portion is adapted to the inner cavities of the first thermal insulation sleeve 1 and the second thermal insulation sleeve 7. The movable portion is fixedly connected to the first thermal insulation sleeve 1 via a hydraulic telescopic rod 2. The outer surface of the hydraulic telescopic rod 2 is wrapped with an insulation pad. The extension and retraction of the hydraulic telescopic rod 2 can change the position of the movable portion fixedly connected thereto. The end of the movable portion away from the hydraulic telescopic rod 2 can move into the inner cavity of the second thermal insulation sleeve 7.

[0022] There is a gap between the inner wall of the connecting rod 8 and the moving part to prevent the connecting rod 8 from blocking the moving part and facilitate heating or cooling the moving part. The width of the gap can be set according to needs and is not limited here.

[0023] The movable portion includes two crucible bodies 4, which are connected by an insulation strip 9. The crucible bodies 4 are connected to the hydraulic telescopic rod 2 by another insulation strip 9. The insulation strip 9 blocks heat transfer between the two crucible bodies 4, and the other insulation strip 9 blocks heat transfer between the hydraulic telescopic rod 2 and the crucible bodies 4. The width of the crucible body 4 is the same as the distance between the first insulation sleeve 1 and the second insulation sleeve 7.

[0024] The fixed part 1 3 is fixedly connected to the side of the first thermal insulation sleeve 1 close to the second thermal insulation sleeve 7, the fixed part 2 6 is fixedly connected to the side of the second thermal insulation sleeve 7 close to the first thermal insulation sleeve 1, the movable part is a U-shaped structure, the top of the horizontal end of the movable part is in contact with the bottom of both the fixed part 1 3 and the fixed part 2 6, and the inner side wall of the vertical end of the movable part is in contact with the vertical ends of both the fixed part 1 3 and the fixed part 2 6. When the present application is in use, the crucible body 4, the fixed part 1 3 and the fixed part 2 6 away from the hydraulic telescopic rod 2 can form a crucible, which is used in the preheating section and the high temperature section. The other crucible body 4 near the hydraulic telescopic rod 2, the fixing part 1 3 and the fixing part 2 6 can form another crucible, which is used in the cooling section. During the cooling process of the other crucible body 4, the second insulation sleeve 7 protects the crucible body 4 to prevent the temperature of the crucible body 4 from decreasing. During the heating process of the crucible body 4, the first insulation sleeve 1 can protect the other crucible body 4 to prevent the temperature of the other crucible body 4 from increasing, thereby reducing the heat loss of the crucible during use and accelerating the speed at which the crucible temperature rises to an appropriate temperature, thereby improving the production efficiency of the vanadium-nitrogen alloy.

[0025] The thermal insulation strip 9 , the first thermal insulation sleeve 1 and the second thermal insulation sleeve 7 may be made of the same material. In some embodiments of the present application, the thermal insulation strip 9 , the first thermal insulation sleeve 1 and the second thermal insulation sleeve 7 are made of high-temperature resistant ceramic fibers.

[0026] A sealing strip 5 is fixedly connected to the side of the fixed part 3 away from the first insulation sleeve 1 and the side of the fixed part 2 6 away from the second insulation sleeve 7. The sealing strip 5 is a U-shaped structure. The bottom of the sealing strip 5 contacts the top of the horizontal end of the moving part, and the vertical end of the sealing strip 5 contacts the inner wall of the vertical end of the moving part. Through the arrangement of the sealing strip 5, the sealing between the crucible body 4 and the fixed part 1 3 and the fixed part 2 6 can be increased. The material of the sealing strip 5 is a flexible sealing material that can withstand more than 1600 degrees, such as high-temperature resistant inorganic fiber. When the moving part moves, the sealing strip 5 can intercept and limit the raw materials in the crucible, thereby facilitating the movement of the moving part.

[0027] In summary: when the special crucible for vanadium-nitrogen alloy production is used, the crucible body 4, the fixing part 1 3 and the fixing part 2 6 away from the hydraulic telescopic rod 2 form a crucible, and the vanadium-nitrogen alloy production ball is placed in the crucible and pushed into the push plate kiln. The ball material passes through the auxiliary kiln drying section (40°C) for drying, and then enters the main kiln and is heated in turn through the preheating section (200-650°C) and the high temperature section (650-1500°C). During this process, the first insulation sleeve 1 protects the other crucible body 4 to reduce the temperature of the other crucible body 4. The temperature changes during the cooling section, and the hydraulic telescopic rod 2 extends, driving the moving part to move until the crucible body 4 moves into the inner cavity of the second thermal insulation sleeve 7. The second thermal insulation sleeve 7 protects the crucible body 4 and reduces the heat loss of the crucible body 4. At this time, another crucible body 4, fixed part 1 3 and fixed part 2 6 near the hydraulic telescopic rod 2 form another crucible. The material in the other crucible is cooled by the cooling section (80-100°C), and the reduction carbonization and nitridation reactions are completed in one step in the kiln to prepare vanadium nitride.

[0028] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology and will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A crucible specially used for the production of vanadium-nitrogen alloy, comprising a first thermal insulation sleeve (1), a second thermal insulation sleeve (7) and a crucible body, characterized in that: The first thermal insulation sleeve (1) and the second thermal insulation sleeve (7) are connected via a connecting rod (8); the crucible body comprises a movable portion, a fixed portion 1 (3) and a fixed portion 2 (6); the movable portion is movably connected to the inner cavity of the first thermal insulation sleeve (1) or the second thermal insulation sleeve (7); the movable portion is connected to the first thermal insulation sleeve (1) via a hydraulic telescopic rod (2); the fixed portion 1 (3) and the fixed portion 2 (6) are both sealed to the movable portion via a sealing strip (5); the fixed portion 1 (3) is fixedly connected to the first thermal insulation sleeve (1), and the fixed portion 2 (6) is fixedly connected to the second thermal insulation sleeve (7); The moving part comprises two crucible bodies (4), the two crucible bodies (4) are connected via a heat insulation strip (9), and the crucible body (4) is connected to the hydraulic telescopic rod (2) via another heat insulation strip (9).

2. The crucible for producing vanadium-nitrogen alloy according to claim 1, characterized in that: The side of the fixing part 1 (3) away from the first heat-insulating sleeve (1) and the side of the fixing part 2 (6) away from the second heat-insulating sleeve (7) are both fixedly connected with a sealing strip (5).

3. The crucible specially used for producing vanadium-nitrogen alloy according to claim 1, characterized in that: The movable part is a U-shaped structure, the top of the horizontal end of the movable part contacts the bottoms of both the fixed part 1 (3) and the fixed part 2 (6), and the inner side wall of the vertical end of the movable part contacts the vertical ends of both the fixed part 1 (3) and the fixed part 2 (6).

4. The crucible for producing vanadium-nitrogen alloy according to claim 3, characterized in that: The sealing strip (5) is a U-shaped structure, the bottom of the sealing strip (5) contacts the top of the horizontal end of the moving part, and the vertical end of the sealing strip (5) contacts the inner wall of the vertical end of the moving part.

5. The special crucible for producing vanadium-nitrogen alloy according to claim 1, characterized in that: There is a gap between the inner side wall of the connecting rod (8) and the moving part.

6. The crucible specially used for producing vanadium-nitrogen alloy according to claim 1, characterized in that: The width of the crucible body (4) is the same as the distance between the first thermal insulation sleeve (1) and the second thermal insulation sleeve (7).

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