Blast furnace coal injection gun

Abstract

The utility model relates to the technical field of coal injection guns, and discloses a blast furnace coal injection gun. The blast furnace coal injection gun comprises a foundation structure assembly, the upper end of the foundation structure assembly is connected and provided with a gun body protection assembly, the upper end of the gun body protection assembly is provided with a heat insulation layer, the upper end of the heat insulation layer is connected and provided with a reinforcing layer, and a wear-resistant layer is installed above the reinforcing layer; a sliding assembly is installed at the lower end of the base structure assembly, a fixing block is installed at the upper end of the sliding assembly, an inserting groove is formed in the fixing block, an inserting plate is installed in the inserting groove, and a connecting groove is connected to the upper end of the inserting plate. The problems that when the coal injection gun is used, the front end of the subsequent coal injection gun is prone to being damaged and the abrasion condition of the coal injection gun needs to be checked subsequently due to the fact that the temperature in the furnace is too high are solved due to the fact that the coke particles directly enter the furnace and are mixed, stirred and burnt slowly with materials.

Description

Technical Field

[0001] The utility model relates to the technical field of coal injection guns, in particular to a blast furnace coal injection gun. Background Art

[0002] The basic principle of reduction smelting is that various lead compounds in the raw materials are reduced under the joint action of natural gas, oxygen, and coke carbonaceous reducing agent. However, from the actual production point of view, the cost of natural gas is relatively high. Coke is directly put into the furnace and mixed with materials for combustion, which will absorb heat first and then release heat. If the operation is improper, it will cause energy waste. More importantly, it will cause CO accumulation and easily cause explosion accidents, causing human, material and financial losses to the enterprise.

[0003] The existing referenceable Chinese utility model patent with announcement number: CN112324922 A discloses a ball valve for a blast furnace coal injection gun, including a valve body, a flange on one side of the valve body, a cover plate sealed and connected on the other side of the valve body, a fixed sleeve in the middle of the cover plate, a locking nut threadedly sleeved on one side of the positioning sleeve, a pulverized coal nozzle extending to one side of the flange on the middle movable sleeve of the locking nut, and an inclined surface design at one end of the pulverized coal nozzle, and a first positioning plate and a second positioning plate are respectively provided on both sides of the inner cavity of the valve body. The ball valve for a blast furnace coal injection gun has a structure design that limits the ball ball through four support shafts and can move up and down as a whole, and cooperates with the elastic force of the spring on the ball ball. During the insertion and removal of the pulverized coal nozzle, the moving distance of the ball valve is reduced, and the impact force of the ball ball on the second positioning plate is small, so that the impact wear degree of the ball ball on the valve slot during the insertion and removal of the pulverized coal nozzle is effectively reduced.

[0004] Based on the search of the above patents and in combination with the equipment in the prior art, it was found that the cost of using natural gas is relatively high. When coke particles are directly put into the furnace and mixed with materials for combustion, it will absorb heat first and then release heat. If the operation is improper, it will cause energy waste on the one hand, and more importantly, it will cause CO accumulation and easily cause explosion accidents, causing human, material and financial losses to the enterprise. When the coal injection gun is used, the temperature in the furnace is too high, which makes the front end of the subsequent coal injection gun easy to be damaged and the wear of the coal injection gun needs to be checked later. The existence of these problems affects the use of the device. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a blast furnace coal injection gun, which can effectively prevent the problem that the front end of the coal injection gun is easily damaged due to excessively high temperature in the furnace when the coal injection gun is in use, and the wear condition of the coal injection gun needs to be checked subsequently.

[0007] Technical Solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a blast furnace coal injection gun, comprising a basic structure component, the upper end of the basic structure component is connected and installed with a gun body protection component which is convenient for insulating and protecting the delivery pipe, and insulates and wears the delivery pipe through an internal heat-proof layer and a wear-resistant layer, and the lower end of the basic structure component is connected and installed with a sliding component which is convenient for driving the upper end of the coal injection gun to slide, so that subsequent users can check the cavity for wear resistance.

[0009] The upper end of the gun body protection assembly is installed with a heat insulation layer, and the upper end of the heat insulation layer is connected to a reinforcement layer, and a wear-resistant layer is installed above the reinforcement layer. The upper end of the wear-resistant layer is made of silicon carbide material, which is an inorganic non-metallic material and has excellent wear resistance.

[0010] A fixed block is installed at the upper end of the sliding component, and a through slot is installed inside the fixed block, an insertion plate is installed inside the through slot, and a connecting groove is connected to the upper end of the insertion plate, and the connecting groove connects the sliding block at the upper end to facilitate the subsequent sliding of the coal injection gun.

[0011] As the preferred technical solution of the utility model, a mixing chamber is installed at the upper end of the basic structure component, and a pouring inlet is installed at the upper end of the mixing chamber. A connecting pipe is connected to the right side of the upper end of the mixing chamber, and an air pump is installed at the side end of the connecting pipe. The air pump is installed at the upper end of the connecting pipe, and gas is generated by the air pump to blow the coal powder inside the mixing chamber into the furnace.

[0012] As the preferred technical solution of the utility model, a delivery pipe is installed at the upper end of the gun body protection assembly, and a nozzle is installed at the internal front end of the delivery pipe, and a heat-proof layer is installed inside the delivery pipe, and the heat-proof layer is installed inside the delivery pipe.

[0013] As a preferred technical solution of the utility model, a sliding block is installed at the upper end of the sliding assembly, a first mounting ring is fixed to the sliding block, and a second mounting ring is installed at the side end of the first mounting ring. The first mounting ring has the same structure as the second mounting ring, which facilitates the subsequent movement of the coal injection gun by the sliding block.

[0014] As a preferred technical solution of the utility model, the gun body protection assembly is installed at the upper end of the mixing chamber in the basic structure assembly, and the sliding assembly is installed at the lower end of the mixing chamber in the basic structure assembly.

[0015] As a preferred technical solution of the utility model, the pouring inlet is a structure that is wide at the top and narrow at the bottom, and the mixing chamber is connected and installed with a delivery pipe.

[0016] As an optimal technical solution of the utility model, the upper end of the heat-proof layer is a micro-nano heat-insulating board, the upper end of the heat-insulating layer is equipped with a device board, the upper end of the heat-insulating layer is an expanded polystyrene board, the upper end of the wear-resistant layer is equipped with wear-resistant particles, and the upper end of the wear-resistant layer is silicon carbide.

[0017] As an optimal technical solution of the utility model, the fixed block is installed at the upper end of the furnace body, the structure of the insertion plate corresponds to the internal structure of the through-slot hole, the first mounting ring has the same structure as the second mounting ring, and the first mounting ring is installed at the upper end of the mixing chamber.

[0018] Compared with the prior art, the utility model provides a blast furnace coal injection gun having the following beneficial effects:

[0019] 1. The utility model transforms the oxygen lance of the reduction furnace on the equipment into a coal injection lance through the setting of the overall device, and the lance core aperture is changed to an aperture suitable for coal injection. In terms of technology, all previous oxygen lances are injected with natural gas and oxygen, and some oxygen lances are changed to coal injection lances for experiments, and protective gas, oxygen and pulverized coal are injected. This project changes the reduction using all natural gas into natural gas coal injection reduction, so that the reducing agent and the molten material are fully stirred and reduced, the furnace temperature is increased quickly, the reduction time is shortened, the energy consumption of natural gas and coke particles and carbon particles is reduced, the production cost is greatly reduced, and the problem of CO rising sharply due to the large-scale use of coke particles is avoided, the production safety is effectively guaranteed, and the high cost of natural gas use is effectively prevented. The phenomenon of first absorbing heat and then releasing heat will occur when coke particles are directly put into the furnace and mixed with materials and stirred and burned slowly. If the operation is improper, it will cause energy waste on the one hand, and more importantly, it will cause CO accumulation and easily cause explosion accidents, causing human, material and financial losses to the enterprise.

[0020] 2. The utility model sets a gun body protection component, in which a heat protection layer is installed. The upper end of the heat protection layer is a micro-nano insulation board, which has excellent heat insulation performance. The outer end is installed with a heat insulation layer, and the upper end of the heat insulation layer is an expanded polystyrene board. The expanded polystyrene board has excellent thermal insulation effect, and its thermal conductivity is between 0.038 and 0.041. The outer end is installed with a wear-resistant layer, and the upper end of the wear-resistant layer is silicon carbide. Silicon carbide is an inorganic non-metallic material with high hardness, and therefore has excellent wear resistance. The delivery pipe is protected and insulated by the above structure, which effectively prevents the front end of the subsequent coal injection gun from being easily damaged due to excessive temperature in the furnace when the coal injection gun is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the basic structural components of the utility model structure;

[0023] Figure 3This is a schematic diagram of the gun body protection component of the utility model structure;

[0024] Figure 4 It is a schematic diagram of the structural sliding assembly of the utility model.

[0025] Among them: 1. Basic structure component; 101. Mixing chamber; 102. Pour inlet; 103. Connecting pipe; 104. Air pump; 2. Gun body protection component; 201. Delivery pipe; 202. Nozzle; 203. Heat protection layer; 204. Heat insulation layer; 205. Reinforcement layer; 206. Wear-resistant layer; 3. Sliding component; 301. Fixed block; 302. Through slot; 303. Insert plate; 304. Connecting slot; 305. Sliding block; 306. First mounting ring; 307. Second mounting ring. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0027] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] See also Figure 1 - Figure 4In this embodiment, a blast furnace coal injection gun includes: a basic structure component 1, a gun body protection component 2 is connected and installed on the upper end of the basic structure component 1, an insulation layer 204 is installed on the upper end of the gun body protection component 2, and a reinforcement layer 205 is connected and installed on the upper end of the insulation layer 204, and a wear-resistant layer 206 is installed above the reinforcement layer 205, a sliding component 3 is installed on the lower end of the basic structure component 1, a fixed block 301 is installed on the upper end of the sliding component 3, and a through slot 302 is installed inside the fixed block 301, an insert plate 303 is installed inside the through slot 302, and the upper end of the insert plate 303 is connected with a connecting groove 304, the gun body protection component 2 is installed at the upper end of the mixing chamber 101 in the basic structure component 1, and the sliding component 3 is installed at the lower end of the mixing chamber 101 in the basic structure component 1.

[0030] Through the above structure; the basic structure component 1 is convenient for the use of the overall coal injection gun, and the coal powder is poured into the mixing chamber 101 for use through the pouring inlet 102 at the upper end. The gun body protection component 2 is convenient for insulating and protecting the conveying pipe 201, and the conveying pipe 201 is insulated and wear-resistant through the internal heat-proof layer 203 and the wear-resistant layer 206. The sliding component 3 is convenient for driving the upper end of the coal injection gun to slide, so that the subsequent user can check the wear resistance of the cavity.

[0031] See also Figure 1 - Figure 4 A mixing chamber 101 is installed at the upper end of the basic structure component 1, and a pouring inlet 102 is installed at the upper end of the mixing chamber 101. A connecting pipe 103 is connected to the right side of the upper end of the mixing chamber 101, and an air pump 104 is installed at the side end of the connecting pipe 103. The pouring inlet 102 is a structure that is wide at the top and narrow at the bottom. The mixing chamber 101 is connected and installed with the delivery pipe 201.

[0032] Through the above structure: the upper pouring inlet 102 is installed and fixed by the installation of the mixing chamber 101, which is convenient for the subsequent placement of the coal powder transported inside the pouring inlet 102, the pouring inlet 102 is installed at the upper end of the mixing chamber 101, which is convenient for the subsequent transportation of the coal powder to be injected, the connecting pipe 103 is connected to the mixing chamber 101, and the upper air pump 104 is fixed and installed through the connecting pipe 103, which is convenient for the subsequent use of the entire device, the air pump 104 is installed at the upper end of the connecting pipe 103, and the gas is generated by the air pump 104 to blow the coal powder inside the mixing chamber 101 into the furnace.

[0033] See also Figure 1 - Figure 4A delivery pipe 201 is installed at the upper end of the gun body protection component 2, and a nozzle 202 is installed at the internal front end of the delivery pipe 201, a heat-proof layer 203 is installed inside the delivery pipe 201, the upper end of the heat-proof layer 203 is a micro-nano heat-insulating board, the upper end of the heat-insulating layer 204 is installed with a device board, the upper end of the heat-insulating layer 204 is an expanded polystyrene board, the upper end of the wear-resistant layer 206 is installed with wear-resistant particles, and the upper end of the wear-resistant layer 206 is silicon carbide.

[0034] Through the above structure: the coal powder to be injected is transported by installing the delivery pipe 201, which is convenient for subsequently spraying the coal powder into the furnace through the nozzle 202. The nozzle 202 is installed at the upper end of the delivery pipe 201, and the gas carrying the coal powder is sprayed into the reduction furnace through the nozzle 202. The heat-proof layer 203 is installed inside the delivery pipe 201, and the upper end of the heat-proof layer 203 is a micro-nano insulation board, which has excellent heat-insulating performance, which is convenient for subsequently insulating the inside of the delivery pipe 201. The heat-insulating layer 204 is installed at the outer end of the delivery pipe 201, and the upper end of the heat-insulating layer 204 is an expanded polystyrene board, which has excellent heat-insulating effect, which is convenient for subsequently insulating the outer end of the delivery pipe 201. The reinforcement layer 205 is used in combination with the wear-resistant layer 206, which is convenient for subsequently performing wear-resistant treatment on the outer end of the delivery pipe 201. The upper end of the wear-resistant layer 206 is a silicon carbide material, which is an inorganic non-metallic material with excellent wear-resistant performance.

[0035] See also Figure 1 - Figure 4 A sliding block 305 is installed at the upper end of the sliding assembly 3, a first mounting ring 306 is fixed to the sliding block 305, and a second mounting ring 307 is installed at the side end of the first mounting ring 306, the fixed block 301 is installed at the upper end of the furnace body, the structure of the insertion plate 303 corresponds to the internal structure of the through-slotting hole 302, the first mounting ring 306 has the same structure as the second mounting ring 307, and the first mounting ring 306 is installed at the upper end of the mixing chamber 101.

[0036] Through the above structure: by installing the fixed block 301, the structure at the upper end is fixed, the fixed block 301 is installed at the outer end of the reduction furnace, which is convenient for the subsequent installation of the connecting groove 304, and the through-slot 302 is installed inside the fixed block 301, which is convenient for the subsequent connection and installation of the upper insertion plate 303, the insertion plate 303 is connected to the connecting groove 304, and the upper end structure of the insertion plate 303 is fitted with the through-slot 302, which is convenient for the subsequent fixing of the connecting groove 304, the connecting groove 304 connects the upper sliding block 305, which is convenient for the subsequent driving of the coal injection gun to slide, and the upper end of the sliding block 305 is fixed with a mounting ring, and the upper end of the sliding block 305 is driven to move by the sliding block 305. The first mounting ring 306 at the upper end is the same in structure as the second mounting ring 307, which is convenient for the subsequent driving of the coal injection gun to move by the sliding block 305.

[0037] When in use, firstly, this project changes the reduction using all natural gas into natural gas coal injection reduction, so that the reducing agent and the molten material are fully stirred for reduction, the furnace temperature is increased quickly, the reduction time is shortened, the energy consumption of natural gas and coke particles and carbon particles is reduced, the production cost is greatly reduced, and the problem of a sharp increase in CO caused by the large-scale use of coke particles is avoided. In order to facilitate subsequent use, the fixed block 301 is installed to the outer end of the furnace body, and a through-slot 302 is installed inside the fixed block 301, and the connecting groove 304 is fixed by the through-slot 302. The lower end of the connecting groove 304 is installed with an insert plate 303, and the insert plate 303 is inserted into the through-slot 302 to fix the connecting groove 304. The first mounting ring 306 and the second mounting ring 307 are fixed to the upper end of the coal injection gun, and the lower end of the first mounting ring 306 is installed with a sliding block 305. The sliding block 305 is installed Inside the connecting groove 304, the upper mounting ring is driven to move by the sliding block 305, so that the coal injection gun can be quickly taken out later. In order to facilitate the use of the front end of the coal injection gun, a heat-insulating and wear-resistant structure is installed on the upper end of the conveying pipe 201, and a heat-proof layer 203 is installed inside the conveying pipe 201. The upper end of the heat-proof layer 203 is a micro-nano insulation board, which has excellent heat-insulating performance, which is convenient for the subsequent insulation of the inside of the conveying pipe 201. The heat-insulating layer 204 is installed on the outer end of the conveying pipe 201. The outer end of the conveying pipe 201 is equipped with a heat-insulating layer 204. The upper end of the heat-insulating layer 204 is an expanded polystyrene board, which has excellent heat-insulating effect, which is convenient for the subsequent insulation of the outer end of the conveying pipe 201. The reinforcement layer 205 is used in combination with the wear-resistant layer 206, so as to facilitate the subsequent wear-resistant treatment of the outer end of the conveying pipe 201.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blast furnace coal injection gun, characterized in that: The invention comprises a basic structure component (1), wherein the upper end of the basic structure component (1) is connected to and installed with a gun body protection component (2), the upper end of the gun body protection component (2) is installed with a heat insulation layer (204), and the upper end of the heat insulation layer (204) is connected to and installed with a reinforcement layer (205), and a wear-resistant layer (206) is installed above the reinforcement layer (205), and the lower end of the basic structure component (1) is installed with a sliding component (3), the upper end of the sliding component (3) is installed with a fixed block (301), and a through slot (302) is installed inside the fixed block (301), and an insertion plate (303) is installed inside the through slot (302), and the upper end of the insertion plate (303) is connected with a connecting groove (304).

2. A blast furnace coal injection gun according to claim 1, characterized in that: A mixing chamber (101) is installed at the upper end of the basic structure component (1), and a pouring inlet (102) is installed at the upper end of the mixing chamber (101). A connecting pipe (103) is connected to the right side of the upper end of the mixing chamber (101), and an air pump (104) is installed at the side end of the connecting pipe (103).

3. A blast furnace coal injection gun according to claim 1, characterized in that: A delivery pipe (201) is installed at the upper end of the gun body protection assembly (2), a nozzle (202) is installed at the front end of the delivery pipe (201), and a heat protection layer (203) is installed inside the delivery pipe (201).

4. A blast furnace coal injection gun according to claim 1, characterized in that: A sliding block (305) is installed at the upper end of the sliding assembly (3), a first mounting ring (306) is fixed to the sliding block (305), and a second mounting ring (307) is installed at the side end of the first mounting ring (306).

5. The blast furnace coal injection gun according to claim 1, characterized in that: The gun body protection component (2) is installed at the upper end of the mixing chamber (101) in the basic structure component (1), and the sliding component (3) is installed at the lower end of the mixing chamber (101) in the basic structure component (1).

6. A blast furnace coal injection gun according to claim 2, characterized in that: The pouring inlet (102) is a structure that is wide at the top and narrow at the bottom, and the mixing chamber (101) is connected and installed with the delivery pipe (201).

7. A blast furnace coal injection gun according to claim 3, characterized in that: The upper end of the heat-proof layer (203) is a micro-nano heat-insulating board, the upper end of the heat-insulating layer (204) is equipped with a device board, the upper end of the heat-insulating layer (204) is an expanded polystyrene board, the upper end of the wear-resistant layer (206) is equipped with wear-resistant particles, and the upper end of the wear-resistant layer (206) is silicon carbide.

8. The blast furnace coal injection gun according to claim 4, characterized in that: The fixing block (301) is installed at the upper end of the furnace body, the structure of the insert plate (303) corresponds to the internal structure of the through-slot (302), the first mounting ring (306) has the same structure as the second mounting ring (307), and the first mounting ring (306) is installed at the upper end of the mixing chamber (101).

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