Vertical nitriding furnace for continuous feeding and discharging production and preparation of silicon-manganese nitride alloy
By designing a vertical nitriding furnace with multiple U-shaped electrode heating and crushing sections in the production of silicon nitride manganese alloys, the problems of uneven heating and high labor intensity of artificial crushing are solved, and uniform heating and efficient crushing of nitrides are achieved. Reduce dust pollution and achieve continuous production.
Patent Information
- Application Number
- CN202420118620.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-18
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-01-18
AI Technical Summary
The existing silicon-manganese nitride alloys are heated unevenly during the production process, and the nitrides are large in size and high in hardness, which leads to manual crushing when discharged, with high labor intensity and dust flying on the production site, making it difficult to achieve continuous production.
A vertical nitriding furnace including multiple parallel arrangement of U-shaped electrodes is designed, with heating sections, reaction sections and cooling sections inside, and two upper and lower crushing devices are provided in the crushing section, and crushing components of steel brazing and hydraulic cylinders are used. Crush the nitride to achieve full sealing and crushing, reduce manual labor, and protect the furnace body through cooling coils.
It realizes the uniformity of material heating and efficient crushing, reduces the labor intensity of manual crushing, reduces dust pollution, and creates continuous production conditions.
Smart Images
Figure CN222257578U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of nitride production equipment, in particular to a vertical nitriding furnace for continuous feeding and discharging production and preparation of silicon manganese nitride alloy. Background Art
[0002] In today's steel smelting, steel bar microalloying and nitrogen addition technology are increasingly widely used. Microalloying is an economical and effective way to produce high-strength steel bars. By adding a small amount of microalloying elements such as manganese, vanadium, titanium, etc. to ordinary carbon steel, the steel grains are refined and the strength, formability and weldability of the steel are improved. For this reason, a series of nitriding alloys such as vanadium nitride, manganese nitride, chromium iron nitride, silicon iron nitride, etc. have been developed. Compared with conventional nitriding alloys, silicon manganese nitride alloy can not only improve the hot working performance of steel, but also refine the pearlite grains and improve the strength of pearlite steel, and also improve the hardenability of steel.
[0003] The production of silicon manganese nitride alloy can be prepared in a vertical nitriding furnace. As a reactor that utilizes self-propagating heat release, the vertical nitriding synthesis furnace does not require an external heat source when the furnace is opened. However, an external heat source is required when the furnace is baked or ignited. At present, the ignition furnace mostly uses a circle of resistance wire on the inner side of the furnace wall for heating. The material in the middle is heated slowly, and the heating is uneven and insufficient. At the same time, the generated nitride is large in size and high in hardness. It needs to be manually crushed when discharging, which makes it difficult to achieve continuous production. In addition, the crushing process is labor-intensive, causing dust to fly at the production site. Utility Model Content
[0004] In view of the technical problems existing in the background technology, the utility model provides a vertical nitriding furnace for continuous feeding and discharging of silicon manganese nitride alloy for production and preparation.
[0005] To achieve the above-mentioned purpose, the utility model provides the following scheme: a vertical nitriding furnace for continuous feeding and discharging of silicon nitride manganese alloy for production and preparation, comprising a vertical furnace body, wherein a feeding port and an air outlet are arranged at the top of the vertical furnace body, and an outlet is arranged at the bottom; a plurality of parallel U-shaped electrodes are also arranged at the middle position of the top of the vertical furnace body, and the two ends of the U-shaped electrodes are respectively connected to the positive and negative electrodes of the power supply, and the materials in the furnace are heated by the U-shaped electrodes; the lower part of the outer wall of the vertical furnace body is connected to a nitrogen gas supply pipeline; the inner cavity of the vertical furnace body is divided into a heating section, a reaction section, a cooling section and a crushing section from top to bottom; upper and lower layers of crushing devices are arranged on the furnace wall of the crushing section, an upper crushing device and a lower crushing device, each layer of the crushing device is composed of a plurality of crushing components, and the crushing components are arranged around the furnace wall at equal intervals, and the crushing components include a steel chisel and a hydraulic cylinder, the telescopic end of the hydraulic cylinder is fixedly connected to the steel chisel, the steel chisel is inserted into the furnace cavity through a hole arranged on the furnace wall, and the fixed end of the hydraulic cylinder is fixed on an annular boss arranged on the outer layer of the furnace wall.
[0006] Furthermore, the steel chisel in the upper crushing device is perpendicular to the furnace body, the steel chisel in the lower crushing device is tilted upward, and the holes on the relative furnace wall are also tilted upward, which is consistent with the moving direction of the steel chisel; the blocky nitrides are crushed at multiple angles.
[0007] Furthermore, the steel chisels in each crushing assembly in the upper crushing device are arranged in three horizontal positions, and the three steel chisels are fixed on a connecting block, and the connecting block is connected to the telescopic end of the hydraulic cylinder.
[0008] Furthermore, the crushing device is arranged in a protective cover to prevent it from being contaminated by dust and affecting its service life.
[0009] Furthermore, the furnace shell of the vertical furnace body includes a steel outer shell and a refractory layer inside the shell.
[0010] Furthermore, a cooling coil is coiled on the outer wall of the vertical furnace body, and a protective shell is provided on the outside of the cooling coil. The purpose of providing the cooling coil is to cool the furnace body and prevent the furnace body from being damaged by long-term high temperature. The purpose of providing a protective shell on the outside is to protect the cooling coil and to ensure the neatness and beauty of the furnace body.
[0011] The technical effects of the utility model are:
[0012] 1. Set up multiple parallel U-shaped electrodes on the top of the vertical furnace body. When heating the material in the furnace, start heating from the middle of the material. Set up multiple U-shaped electrodes, the contact area with the material is larger, the material is heated more evenly, and the heating is faster.
[0013] 2. A crushing section is set below the cooling section, and a crushing device is installed on the furnace wall of the crushing section. The crushing assembly breaks the super-large pieces of nitride into relatively small pieces for easy removal from the furnace. This setting reduces the labor intensity of manual crushing, creates conditions for achieving full sealing of the production process, and solves the problem of large dust on the production site. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the utility model;
[0015] Figure 2 It is a top view of the utility model;
[0016] Figure 3 for Figure 2 Cross-sectional view along CC;
[0017] Figure 4 This is a schematic diagram of a U-shaped electrode in the utility model;
[0018] Figure 5 Embodiment 1 of the crushing device in the protective cover;
[0019] Figure 6 This is the embodiment 2 of the crushing device in the protective cover;
[0020] Figure 7 It is a schematic diagram of the crushing assembly of three steel chisels;
[0021] In the figure, 1. vertical furnace body, 101. steel shell, 102, refractory layer, 2. feed port, 3. gas outlet, 4. discharge port, 5. nitrogen gas supply pipeline, 6. heating section, 7. reaction section, 8. cooling section, 9. crushing section, 1001. upper crushing device, 1002. lower crushing device, 11. crushing assembly, 1101. steel chisel, 1102. hydraulic cylinder, 1103. connecting block, 12. annular boss, 13. protective cover, 14. U-shaped electrode, 15. cooling coil, 16. protective shell. DETAILED DESCRIPTION
[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific Figures 1-7.
[0023] Reference Figure 1-4 As shown, the utility model provides a vertical nitriding furnace for continuous feeding and discharging of silicon manganese nitride alloy, comprising a vertical furnace body 1, wherein a feeding port 2 and an air outlet 3 are arranged at the top of the vertical furnace body 1, and an outlet 4 is arranged at the bottom; a plurality of parallel U-shaped electrodes 14 are also arranged in the middle position of the top of the vertical furnace body 1, and the two ends of the U-shaped electrode 14 are respectively connected to the positive and negative electrodes of the power supply, and the material in the furnace is heated by the U-shaped electrode 14; the lower part of the outer wall of the vertical furnace body 1 is connected to a nitrogen gas supply pipeline 5; the inner cavity of the vertical furnace body 1 is divided into a heating section 6, a reaction section 7, a cooling section 8 and a crushing section 9 from top to bottom; the heating section heats the material, and after being heated to a certain temperature, the material falls to the reaction section, and continues to react in the reaction section. The process of producing silicon manganese nitride is an exothermic reaction, which reacts rapidly and releases high temperature. After the reaction is completed, the material falls into the cooling section, and after cooling, it falls into the crushing section below the cooling section, and after crushing, the material is discharged from the outlet at the bottom of the furnace;
[0024] The furnace wall of the crushing section 9 is provided with upper and lower crushing devices, an upper crushing device 1001 and a lower crushing device 1002. Each crushing device is composed of a plurality of crushing components 11, which are arranged at equal intervals around the furnace wall. The crushing components 11 include a steel chisel 1101 and a hydraulic cylinder 1102, the telescopic end of the hydraulic cylinder 1102 is fixedly connected to the steel chisel 1101, the steel chisel is inserted into the furnace cavity through a hole provided on the furnace wall, and the fixed end of the hydraulic cylinder is fixed to an annular boss 12 provided on the outer layer of the furnace wall.
[0025] The furnace shell of the vertical furnace body 1 includes a steel outer shell 101 and a refractory layer 102 inside the shell.
[0026] A cooling coil 15 is coiled on the outer wall of the vertical furnace body 1, and a protective shell 16 is arranged on the outside of the cooling coil. The purpose of arranging the cooling coil is to cool the furnace body and prevent the furnace body from being damaged by long-term high temperature. The purpose of arranging a protective shell on the outside is to protect the cooling coil and to ensure the neatness and beauty of the furnace body.
[0027] like Figure 5 In the crushing device embodiment 1 shown, the steel chisel in the upper crushing device 1001 is perpendicular to the furnace body, and the steel chisel in the lower crushing device 1002 is tilted upward, and the holes on the relative furnace wall are also tilted upward, which is consistent with the moving direction of the steel chisel; the blocky nitrides are crushed at multiple angles.
[0028] like Figure 6 In the crushing device embodiment 2 shown, based on embodiment 1, the steel chisels 1101 in each crushing assembly in the upper crushing device 1001 are arranged as three horizontally, and the three steel chisels are fixed on the connecting block 1103, and the connecting block 1103 is connected to the telescopic end of the hydraulic cylinder 1102.
[0029] In practical applications, the crushing device is arranged in the protective cover 13 to prevent the crushing device from being contaminated by dust.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A vertical nitriding furnace for continuous feeding and discharging of silicon manganese nitride alloy, characterized in that: The vertical furnace body (1) comprises a feed inlet (2) and a gas outlet (3) at the top of the vertical furnace body (1), and a discharge outlet (4) at the bottom; a plurality of parallel U-shaped electrodes (14) are also arranged in the middle of the top of the vertical furnace body (1), and the two ends of the U-shaped electrodes (14) are respectively connected to the positive and negative electrodes of a power source; and the lower part of the outer wall of the vertical furnace body is connected to a nitrogen gas supply pipeline (5); The inner cavity of the vertical furnace body is divided from top to bottom into a heating section (6), a reaction section (7), a cooling section (8) and a crushing section (9); An upper and lower layer of crushing devices are arranged on the furnace wall of the crushing section (9), namely an upper layer crushing device (1001) and a lower layer crushing device (1002). Each layer of crushing devices is composed of a plurality of crushing components (11). The crushing components are arranged at equal intervals around the furnace wall. The crushing components (11) include a steel chisel (1101) and a hydraulic cylinder (1102). The telescopic end of the hydraulic cylinder is fixedly connected to the steel chisel. The steel chisel is inserted into the furnace cavity through a hole arranged on the furnace wall. The fixed end of the hydraulic cylinder is fixed to an annular boss (12) arranged on the outer layer of the furnace wall.
2. A vertical nitriding furnace for continuous feeding and discharging of silicon manganese nitride alloy according to claim 1, characterized in that: The steel chisel in the upper crushing device (1001) is perpendicular to the furnace body, the steel chisel in the lower crushing device (1002) is arranged to be tilted upward, and the holes on the opposite furnace wall are also tilted upward.
3. A vertical nitriding furnace for continuous feeding and discharging of silicon manganese nitride alloy according to claim 2, characterized in that: The steel chisels (1101) in each crushing assembly of the upper crushing device (1001) are arranged in three pieces in a horizontal arrangement, and the three steel chisels are fixed on a connecting block (1103), and the connecting block is connected to the telescopic end of the hydraulic cylinder (1102).
4. A vertical nitriding furnace for continuous feeding and discharging of silicon manganese nitride alloy according to any one of claims 1 to 3, characterized in that: The crushing device is arranged in the protective cover (13).
5. A vertical nitriding furnace for continuous feeding and discharging of silicon manganese nitride alloy according to claim 1, characterized in that: The furnace shell of the vertical furnace body (1) comprises a steel outer shell (101) and a refractory layer (102) inside the shell.
6. A vertical nitriding furnace for continuous feeding and discharging of silicon manganese nitride alloy according to claim 1, characterized in that: A cooling coil (15) is wound on the outer wall of the vertical furnace body (1), and a protective shell (16) is provided on the outer side of the cooling coil.