Continuous heating device for gas atomization casting ladle

Abstract

The continuous heating device comprises an outer shell, an inner shell and a heat insulation layer, the inner shell is arranged in the outer shell, the outer shell is fixedly connected with the inner shell, the heat insulation layer is arranged between the outer shell and the inner shell, the outer shell is provided with a vacuum layer, and a plurality of spray gun insertion pipes are arranged on the side face of the outer shell in the circumferential direction. The spray gun insertion pipe communicates with the inner wall of the inner shell and the outer wall of the outer shell. When the device is used, flame heating with low cost is adopted for heating the tundish crucible, heat preservation is conducted on the device through multiple measures, heat loss is prevented, and the temperature of the crucible in the ladle casting process is kept stable.

Description

Technical Field

[0001] The utility model relates to the technical field of non-vacuum smelting gas atomization powder making equipment, in particular to a continuous heating device for a gas atomization ladle. Background Art

[0002] The non-vacuum induction gas atomization powder making method is a highly efficient method for preparing spherical metal powders. During the production process, the temperature of the molten metal is lost when it is atomized by the tundish crucible, and it needs to be kept warm. In this process, as the pouring time increases, the temperature of the molten steel in the tundish crucible often becomes unstable, and eventually blockage and large fluctuations in powder properties occur. In this case, the tundish crucible needs to be replaced, and the material head at the lower end of the guide tube will hit the annular nozzle of the atomizer when the tundish is removed. The atomizer is destroyed in a short time, becomes abnormally scrapped, and continuous and stable atomization cannot be achieved.

[0003] The conventional flame heating method heats the tundish crucible through a flame spray gun. During the pouring process, the inner wall temperature is high and the outer wall temperature is low, resulting in severe temperature loss of the first pour of steel and resulting in ladle blockage. In another case, as the pouring time increases, the temperature of the molten steel in the tundish crucible is unstable, resulting in large fluctuations in powder properties.

[0004] The IGBT induction heating method is adopted to induction heat the tundish crucible through the graphite heating carrier, which solves the problem of temperature difference between the inside and outside of the tundish crucible and temperature stability. However, the graphite heating element is severely oxidized in a non-vacuum environment, and the graphite heating element consumables are expensive, which increases production costs. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a continuous heating device for a gas atomization ladle.

[0006] The technical solution of the utility model is: a continuous heating device for a gas atomization ladle, comprising an outer shell, an inner shell and a heat insulation layer, an inner shell is arranged inside the outer shell, the outer shell and the inner shell are fixedly connected, a heat insulation layer is arranged between the outer shell and the inner shell, the outer shell is provided with a vacuum layer, a plurality of spray gun tubes are arranged on the circumference of the side surface of the outer shell, and the spray gun tubes connect the inner wall of the inner shell and the outer wall of the outer shell.

[0007] Furthermore, a plurality of connecting columns are provided on the circumferential direction of the side surface of the outer wall of the inner shell, and two ends of the connecting columns are respectively welded to the outer wall of the inner shell and the inner wall of the outer shell.

[0008] Furthermore, the spray gun insert tube is a seamless steel tube, and the side wall of the spray gun insert tube is integrated with the outer shell and the inner shell.

[0009] Furthermore, the heat insulation layer is made of ceramic fiber material, and the heat insulation layer fills the space between the outer wall of the inner shell and the inner wall of the outer shell.

[0010] Furthermore, a sealing cover is provided on the top of the thermal insulation layer, and the bottom surface of the sealing cover is in contact with the top surfaces of the thermal insulation layer, the outer shell and the inner shell.

[0011] Furthermore, a plurality of positioning pins are provided on the circumference of the bottom surface of the cover, and positioning holes matching the positioning pins are provided on the top surface of the heat insulation layer.

[0012] Furthermore, the outer wall of the shell is provided with symmetrically distributed handles.

[0013] Further, the spray gun cannula is inserted along the horizontal direction at an angle of 3-5°.

[0014] Compared with the prior art, the utility model has the following advantages: the flame spray gun passes through the spray gun insert tube and extends into the inner shell, the spray gun heats the inner shell, and the heat insulation layer prevents the temperature from losing quickly, so that the temperature of the tundish crucible is kept stable during the pouring process; the vacuum layer effectively prevents the temperature from losing and improves the thermal insulation performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is an overall schematic diagram of the utility model;

[0017] Figure 2 It is an overall vertical cross-sectional view of the utility model;

[0018] Figure 3 It is an overall transverse cross-sectional view of the utility model.

[0019] Among them: 1. outer shell; 2. inner shell; 3. sealing cover; 4. thermal insulation layer; 11. spray gun insert tube; 12. handle; 13. vacuum layer; 21. connecting column; 22. positioning hole; 31. positioning pin. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0021] The specific implementation of the utility model will be described below in conjunction with the accompanying drawings:

[0022] like Figures 1 to 3 As shown, a continuous heating device for a gas atomization ladle comprises an outer shell 1, an inner shell 2 and a heat-insulating layer 4. The inner shell 2 is arranged inside the outer shell 1, and the tundish crucible is arranged inside the inner shell 2. A plurality of connecting columns 21 are arranged in the circumferential direction of the side surface of the outer wall of the inner shell 2, and the two ends of the connecting columns 21 are welded to the outer wall of the inner shell 2 and the inner wall of the outer shell 1. The outer shell 1 and the inner shell 2 are connected tightly by the connecting columns 21. The outer shell 1 and the inner shell 2 are fixedly connected, and a heat-insulating layer 4 is arranged between the outer shell 1 and the inner shell 2. The heat-insulating layer 4 is a ceramic fiber material, and the heat-insulating layer 4 fills the space between the outer wall of the inner shell 2 and the inner wall of the outer shell 1. The excellent heat-insulating property of the ceramic fiber material is utilized to retain the heat inside the inner shell 2, so that the temperature of the tundish crucible is kept stable.

[0023] The outer shell 1 is provided with a vacuum layer 13, which can prevent heat from diffusing to the outside of the device through heat transfer, further preventing heat loss. A plurality of spray gun tubes 11 are provided on the circumference of the side of the outer shell 1, and the spray gun tubes 11 connect the inner wall of the inner shell 2 and the outer wall of the outer shell 1. The spray gun tubes 11 are seamless steel pipes, and the side walls of the spray gun tubes 11 are integrated with the outer shell 1 and the inner shell 2. The flame spray gun passes through the spray gun tube 11 and fits with the inner wall of the spray gun tube 11. The spray gun tube 11 is inserted along the horizontal direction at an angle of 3-5°, which is convenient for the flame spray gun to heat the inner shell 2, so that the tundish crucible is heated evenly. A cover 3 is provided on the top of the insulation layer 4, and the bottom surface of the cover 3 fits with the insulation layer 4, the outer shell 1 and the top surface of the inner shell 2. A plurality of positioning pins 31 are provided on the circumference of the bottom surface of the cover 3, and a positioning hole 22 matching the positioning pins 31 is provided on the top surface of the insulation layer 4. The positioning pin 31 cooperates with the positioning hole 22 to quickly confirm the relative position of the cover 3 and the heat insulation layer 4. The cover 3 has heat insulation properties and can prevent heat from being lost from the top surface of the device. The outer wall of the housing 1 is provided with symmetrically distributed handles 12, which facilitate installation or removal of the device.

[0024] The working principle of the specific implementation mode of the utility model is as follows: the tundish crucible is assembled into the inner shell 2, the flame spray gun is started and inserted into the spray gun insert tube 11, the flame spray gun heats the inner shell 2, and the heat is evenly heated to the tundish crucible through convection and heat transfer inside the inner shell 2. The heat insulation layer 4, the cover 3 and the vacuum layer 13 can reduce the heat loss inside the device, so that the temperature of the tundish crucible remains stable.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A continuous heating device for a gas atomization ladle, characterized in that: The invention comprises an outer shell (1), an inner shell (2) and a heat insulating layer (4); the inner shell (2) is arranged inside the outer shell (1); the outer shell (1) and the inner shell (2) are fixedly connected; the heat insulating layer (4) is arranged between the outer shell (1) and the inner shell (2); the outer shell (1) is provided with a vacuum layer (13); a plurality of spray gun tubes (11) are arranged in the circumferential direction of the side surface of the outer shell (1); the spray gun tubes (11) are connected to the inner wall of the inner shell (2) and the outer wall of the outer shell (1).

2. The continuous heating device for gas atomization ladle according to claim 1 is characterized in that: A plurality of connection columns (21) are provided on the circumference of the side surface of the outer wall of the inner shell (2), and the two ends of the connection columns (21) are respectively welded to the outer wall of the inner shell (2) and the inner wall of the outer shell (1).

3. The continuous heating device for gas atomization ladle according to claim 1 is characterized in that: The spray gun insert tube (11) is a seamless steel tube, and the side wall of the spray gun insert tube (11) is integrated with the outer shell (1) and the inner shell (2).

4. The continuous heating device for gas atomization ladle according to claim 1 is characterized in that: The heat insulation layer (4) is made of ceramic fiber material, and the heat insulation layer (4) fills the space between the outer wall of the inner shell (2) and the inner wall of the outer shell (1).

5. The continuous heating device for gas atomization ladle according to claim 1 is characterized in that: A sealing cover (3) is provided on the top of the thermal insulation layer (4), and the bottom surface of the sealing cover (3) is in contact with the top surfaces of the thermal insulation layer (4), the outer shell (1) and the inner shell (2).

6. The continuous heating device for gas atomization ladle according to claim 5, characterized in that: A plurality of positioning pins (31) are provided in the circumferential direction of the bottom surface of the sealing cover (3), and a positioning hole (22) matching the positioning pins (31) is provided on the top surface of the heat insulation layer (4).

7. The continuous heating device for gas atomization ladle according to claim 1 is characterized in that: The outer wall of the housing (1) is provided with symmetrically distributed handles (12).

8. The continuous heating device for gas atomization ladle according to claim 1 is characterized in that: The spray gun cannula (11) is inserted along the horizontal direction at an angle of 3-5°.

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