Electric furnace ash cold agglomeration preheating device

Abstract

The utility model discloses an electric furnace ash cold agglomeration preheating device, and relates to the technical field of electric furnace ash cold agglomeration. Comprising a heating furnace, a feeding assembly is arranged in the center of the top face of the heating furnace, a discharging assembly is arranged in the center of the bottom face of the heating furnace, and a heating furnace radar level gauge used for detecting the stacking height in the heating furnace is fixedly connected to the top in the heating furnace and arranged on one side of the feeding assembly; an infrared temperature measuring device used for detecting the temperature of the electric furnace ash cooling agglomerates is arranged on one side of the discharging assembly, the infrared temperature measuring device is fixedly connected with the bottom of the heating furnace, and a heating assembly used for heating the electric furnace ash cooling agglomerates is arranged in the heating furnace. The inside of the heating furnace is heated through the heating assembly, the stacking height in the heating furnace is detected through the heating furnace radar level gauge, the temperature of the bottom in the heating furnace is detected through the infrared temperature measuring device arranged at the bottom of the heating furnace, the inside and the outside of pellets can be effectively heated, and the heat utilization efficiency and the pellet quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric furnace ash cold block making, in particular to an electric furnace ash cold block making preheating device. Background Art

[0002] Electric furnace dust, collected by dust removal equipment during the electric furnace steelmaking process, contains large amounts of metal oxides, particularly iron, zinc, and lead. With the continuous development of my country's steel and power industries, the production of electric furnace dust has continued to increase, reaching 25 million tons. The average zinc content in electric furnace dust is approximately 10%, making it highly valuable for recycling. However, improper recycling of zinc and lead can cause serious environmental pollution. Cold agglomeration technology, an effective method for treating electric furnace dust, solidifies powdered electric furnace dust into agglomerates with stable composition, high strength, and uniform particle size, making it easy to transport, store, and recycle.

[0003] Electric furnace ash cold agglomerates can react directly after preheating. During the preheating process of electric furnace ash cold agglomerates, traditional electric furnace ash cold agglomerates mainly use carbon (coal) as the main heat source. While burning to provide heat, a large amount of CO and CO2 will be generated, which brings great pressure to the low-carbon production of the entire process of steel metallurgy. In addition, there is the phenomenon of uneven heating of the cold agglomerates and excessive temperature difference between the inside and outside, which directly affects the stability of the electric furnace ash cold agglomerates. In addition, the electric heating methods currently used have the problem of limited heat radiation or heat penetration depth. Therefore, there is an urgent need for an electric furnace ash cold agglomerate preheating device that can effectively heat the inside and outside of the pellets to improve heat utilization efficiency and pellet quality. Utility Model Content

[0004] The purpose of the utility model is to provide a device for preheating cold blocks of electric furnace ash to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides an electric furnace ash cold block preheating device, comprising a heating furnace, a feeding assembly is provided at the center of the top surface of the heating furnace, a discharging assembly is provided at the center of the bottom surface of the heating furnace, a heating furnace radar level meter for detecting the stacking height in the heating furnace is fixedly connected to the top of the heating furnace, the heating furnace radar level meter is provided on one side of the feeding assembly, an infrared temperature measuring device for detecting the temperature of the electric furnace ash cold block is provided on one side of the discharging assembly, the infrared temperature measuring device is fixedly connected to the bottom of the heating furnace, and a heating assembly for heating the electric furnace ash cold block is provided in the heating furnace.

[0006] Preferably, the heating furnace includes an insulation layer and a heating furnace lining, the lower portion of the heating furnace lining is fixedly connected to the bottom of the heating furnace via a lining bracket, and the top of the heating furnace lining is fixedly connected to the top surface of the heating furnace.

[0007] Preferably, the insulation layer comprises a stainless steel furnace shell, and aluminum silicate rock wool is fixedly connected to the inner wall of the stainless steel furnace shell.

[0008] Preferably, the feeding assembly includes a feeding barrel connected to the top surface of the heating furnace, a material stopper is provided in the feeding barrel, an upper end expansion joint is provided below the material stopper, the upper end expansion joint is installed on the top surface of the heating furnace, and the end of the feeding barrel away from the heating furnace is connected to a sealing valve group.

[0009] Preferably, the discharge assembly includes a lower expansion joint connected to the bottom of the heating furnace, and the lower expansion joint is fixedly connected to one end away from the heating furnace and is equipped with a high-temperature spiral discharger.

[0010] Preferably, the middle portion of the heating furnace lining is cylindrical, and both ends of the heating furnace lining are conical.

[0011] Preferably, both ends of the heating furnace lining are connected to the feed barrel and the lower end expansion joint respectively.

[0012] Preferably, the heating assembly includes a plurality of upper electric heating rods and a plurality of lower electric heating rods, and the upper electric heating rods are arranged above the lower electric heating rods.

[0013] Preferably, one end of the upper electric heating rod passes through the cone on the upper part of the heating furnace lining and extends into the heating furnace lining, and the other end of the upper electric heating rod extends out of the stainless steel furnace shell.

[0014] Preferably, one end of the lower electric heating rod passes through the cylinder in the middle of the heating furnace lining and extends into the heating furnace lining, and the other end of the lower electric heating rod extends out of the stainless steel furnace shell.

[0015] The utility model discloses the following technical effects:

[0016] The utility model heats the heating furnace through a heating component, detects the stacking height in the heating furnace through a heating furnace radar level meter, and detects the temperature of the bottom of the heating furnace through an infrared temperature measuring device arranged at the bottom of the heating furnace, which can effectively heat the inside and outside of the pellets, thereby improving heat utilization efficiency and pellet quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0019] Figure 2 This is a side sectional structural diagram of the utility model;

[0020] Figure 3 This is a schematic diagram of the internal top view structure of the utility model;

[0021] Among them, 1. Heating furnace; 2. Heating furnace bracket; 3. Material stop; 4. Sealing valve group; 5. High-temperature spiral discharger; 6. Insulation layer; 7. Heating furnace lining; 8. Lining bracket; 9. Stainless steel furnace shell; 10. Aluminum silicate rock wool; 11. Heating furnace radar level meter; 12. Stacking height; 13. Upper electric heating rod; 14. Lower electric heating rod; 15. Heat dissipation steel sheet; 16. Infrared temperature measuring device; 17. Upper expansion joint; 18. Lower expansion joint. DETAILED DESCRIPTION

[0022] 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.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Example 1

[0025] Reference Figure 1-Figure 3 The utility model discloses a preheating device for cold briquetting of electric furnace ash, comprising a heating furnace 1, a feeding assembly being provided at the center of the top surface of the heating furnace 1, a discharging assembly being provided at the center of the bottom surface of the heating furnace, a heating furnace radar level meter 11 for detecting the stacking height 12 in the heating furnace 1 being fixedly connected to the top of the heating furnace 1, the heating furnace radar level meter 11 being provided on one side of the feeding assembly, an infrared temperature measuring device 16 for detecting the temperature of cold briquetting of electric furnace ash being provided on one side of the discharging assembly, the infrared temperature measuring device 16 being fixedly connected to the bottom of the heating furnace 1, and a heating assembly for heating cold briquetting of electric furnace ash being provided in the heating furnace 1.

[0026] A heating furnace bracket 2 for supporting the heating furnace 1 is fixedly connected to the bottom of the heating furnace 1 .

[0027] The utility model heats the heating furnace 1 through a heating component, detects the stacking height 12 in the heating furnace through a heating furnace radar level meter 11, and detects the temperature of the bottom of the heating furnace through an infrared temperature measuring device 16 arranged at the bottom of the heating furnace 1, which can effectively heat the inside and outside of the pellets, thereby improving heat utilization efficiency and pellet quality.

[0028] In a further optimized solution, the heating furnace 1 includes an insulation layer 6 and a heating furnace lining 7. The lower portion of the heating furnace lining 7 is fixedly connected to the bottom of the heating furnace 1 via a lining bracket 8, and the top of the heating furnace lining 7 is fixedly connected to the top surface of the heating furnace 1. By providing the insulation layer 6 and the heating furnace lining 7, the thermal insulation performance is effectively improved.

[0029] In a further optimized solution, the insulation layer 6 includes a stainless steel furnace shell 9, to the inner wall of which is fixedly connected aluminum silicate rock wool 10. The stainless steel furnace shell 9 is made of 310s stainless steel, which effectively improves the insulation effect of the heating furnace 1, prevents heat from being lost in the heating furnace 1, and improves heat utilization efficiency.

[0030] To further optimize the solution, the feeding assembly includes a feeding barrel connected to the top surface of the heating furnace 1, a material stop 3 is provided in the feeding barrel, an upper end expansion joint 17 is provided below the material stop 3, the upper end expansion joint 17 is installed on the top surface of the heating furnace 1, and the end of the feeding barrel away from the heating furnace 1 is connected to a sealing valve group 4.

[0031] The material stopper 3 is used to control the speed and quantity of material discharge. The material stopper 3 can effectively control the stacking height 12 in the heating furnace 1; at the same time, the upper expansion joint 17 is installed on the top surface of the heating furnace 1, which can effectively absorb high temperature to protect the furnace body of the heating furnace 1.

[0032] The heating furnace radar level meter 11 detects the stacking height 12 and transmits different electrical signals to the material stop 3, which slows down the movement speed of the material stop 3. After a period of time, when the stacking height 12 approaches 0.9m, the movement speed of the material stop 3 is restored, thereby achieving material level control of the heating furnace 1 and improving production efficiency.

[0033] According to a further optimized solution, the discharge assembly includes a lower expansion joint 18 connected to the bottom of the heating furnace 1 , and the lower expansion joint 18 is fixedly connected to one end away from the heating furnace 1 and is connected to a high-temperature spiral discharger 5 .

[0034] The infrared temperature measuring device 16 detects the temperature of the cold ash agglomerates at the bottom of the heating furnace 1 and transmits different electrical signals to the high-temperature screw discharger 5. When the temperature of the cold ash agglomerates at the bottom of the heating furnace 1 exceeds 950°C, the high-temperature screw discharger 5 speeds up the material conveying process. This achieves material level control in the heating furnace 1 and improves production efficiency.

[0035] The preheated electric furnace ash is cold-blocked and transported out through the high-temperature spiral discharging machine 5 for the next reaction.

[0036] According to a further optimized solution, the middle portion of the heating furnace lining 7 is cylindrical, and both ends of the heating furnace lining 7 are conical.

[0037] To further optimize the solution, both ends of the heating furnace lining 7 are connected to the feed tube and the lower end expansion joint 18 respectively, so that the material can enter the heating furnace lining 7 through the feed tube.

[0038] According to a further optimized solution, the heating assembly includes a plurality of upper electric heating rods 13 and a plurality of lower electric heating rods 14 , and the upper electric heating rods 13 are arranged above the lower electric heating rods 14 .

[0039] To further optimize the solution, one end of the upper electric heating rod 13 passes through the cone on the upper part of the heating furnace lining 7 and extends into the heating furnace lining 7, and the other end of the upper electric heating rod 13 extends out of the stainless steel furnace shell 9.

[0040] To further optimize the solution, one end of the lower electric heating rod 14 passes through the cylinder in the middle of the heating furnace lining 7 and extends into the heating furnace lining 7, and the other end of the lower electric heating rod 14 extends out of the stainless steel furnace shell 9.

[0041] Several heat dissipation steel sheets 15 are installed on the upper electric heating material rod 13 and the lower electric heating material rod 14. The heat dissipation steel sheets 15 are tilted to accelerate the heat transfer process in the furnace charge and improve the thermal efficiency.

[0042] Several upper electric heating rods 13 and several lower electric heating rods 14 are arranged crosswise, the upper electric heating rods 13 form an angle of 60° with the vertical direction, and the lower electric heating rods 14 form an angle of 30° with the vertical direction.

[0043] The cold blocks of electric furnace ash are heated from 700°C to 950°C by a plurality of upper electric heating rods 13 and a plurality of lower electric heating rods 14, with the internal temperature at 900°C and the external temperature at 950°C.

[0044] Example 2

[0045] Reference Figure 3 The difference between this embodiment and the first embodiment is that there are four upper electric heating rods 13 and four lower electric heating rods 14 respectively. The four upper electric heating rods 13 are arranged at equal intervals along the conical cylinder on the upper part of the heating furnace lining 7; the four lower electric heating rods 14 are arranged at equal intervals along the cylinder in the middle part of the heating furnace lining 7.

[0046] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0047] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A cold agglomeration preheating device for electric furnace ash, characterized by: The invention comprises a heating furnace (1), wherein a feeding assembly is provided at the center of the top surface of the heating furnace (1), a discharging assembly is provided at the center of the bottom surface of the heating furnace, a heating furnace radar level meter (11) for detecting the stacking height (12) in the heating furnace (1) is fixedly connected to the top of the heating furnace (1), the heating furnace radar level meter (11) is provided on one side of the feeding assembly, an infrared temperature measuring device (16) for detecting the temperature of the cold agglomeration of electric furnace ash is provided on one side of the discharging assembly, the infrared temperature measuring device (16) is fixedly connected to the bottom of the heating furnace (1), and a heating assembly for the cold agglomeration of the electric furnace ash is provided in the heating furnace (1).

2. The electric furnace ash cold agglomeration preheating device according to claim 1, characterized in that: The heating furnace (1) comprises a heat-insulating layer (6) and a heating furnace lining (7); the lower portion of the heating furnace lining (7) is fixedly connected to the bottom of the heating furnace (1) via a lining bracket (8); and the top of the heating furnace lining (7) is fixedly connected to the top surface inside the heating furnace (1).

3. The electric furnace ash cold agglomeration preheating device according to claim 2, characterized in that: The heat-insulating layer (6) comprises a stainless steel furnace shell (9), and aluminum silicate rock wool (10) is fixedly connected to the inner wall of the stainless steel furnace shell (9).

4. The electric furnace ash cold agglomeration preheating device according to claim 3, characterized in that: The feeding assembly includes a feeding barrel connected to the top surface of the heating furnace (1), a material stopper (3) is provided in the feeding barrel, an upper end expansion joint (17) is provided below the material stopper (3), and the upper end expansion joint (17) is installed on the top surface of the heating furnace (1), and the end of the feeding barrel away from the heating furnace (1) is connected to a sealing valve group (4).

5. The electric furnace ash cold agglomeration preheating device according to claim 4, characterized in that: The discharge assembly comprises a lower expansion joint (18) connected to the bottom of the heating furnace (1); the lower expansion joint (18) is fixedly connected to one end away from the heating furnace (1) and is connected to a high-temperature spiral discharger (5).

6. The electric furnace ash cold agglomeration preheating device according to claim 5, characterized in that: The middle portion of the heating furnace lining (7) is cylindrical, and both ends of the heating furnace lining (7) are conical.

7. The electric furnace ash cold agglomeration preheating device according to claim 6, characterized in that: The two ends of the heating furnace lining (7) are respectively connected to the feed barrel and the lower end expansion joint (18).

8. The electric furnace ash cold agglomeration preheating device according to claim 5, characterized in that: The heating assembly comprises a plurality of upper electric heating rods (13) and a plurality of lower electric heating rods (14), wherein the upper electric heating rods (13) are arranged above the lower electric heating rods (14).

9. The electric furnace ash cold agglomeration preheating device according to claim 8, characterized in that: One end of the upper electric heating rod (13) passes through the cone at the upper part of the heating furnace lining (7) and extends into the heating furnace lining (7), and the other end of the upper electric heating rod (13) extends out of the stainless steel furnace shell (9).

10. The electric furnace ash cold agglomeration preheating device according to claim 8, characterized in that: One end of the lower electric heating rod (14) passes through the cylinder in the middle of the heating furnace lining (7) and extends into the heating furnace lining (7), and the other end of the lower electric heating rod (14) extends out of the stainless steel furnace shell (9).

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