Converter flue for steelmaking

Abstract

The utility model relates to the field of flues, in particular to a converter flue for steelmaking, which comprises a flue pipe, a lime chute and an oxide scale chute are arranged on the outer walls of two sides of one end of the flue pipe, a fixing cover is mounted in the lime chute and the oxide scale chute, and a conveying pipe is welded on the outer wall of the bottom of one end of the oxide scale chute. The outer wall of one end of the conveying pipe is connected with a driving assembly, and the outer wall of one end of the oxide scale chute is connected with a conveying structure. The conveying structure comprises a smashing cylinder, a set of smashing rollers rotationally connected to the inner wall of the smashing cylinder, and transmission gears connected to the outer walls of one ends of the smashing rollers. The conveying motor drives the oxide scale to be conveyed into the oxide scale chute through the spiral conveying shaft, after the fan is started, flue gas in the flue pipe is extracted and conveyed into the conveying pipe, and the oxide scale conveyed by the spiral conveying shaft is sprayed into the flue pipe by sprayed gas, so that the oxide scale is convenient to convey and spray out, and the influence of the fan is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of flues, in particular to a converter flue for steelmaking. Background Art

[0002] The flue of the converter is one of the main supporting equipment for converter steelmaking. It is the main emission channel of waste gas generated in the steelmaking process. The flue of the converter plays a vital role in the steel production process. Traditionally, feeding chutes are set on both sides of the flue to add limestone into the converter through the chutes, which plays a role in reducing the content of harmful elements such as phosphorus and sulfur in the molten steel, thereby improving the mechanical properties of the steel.

[0003] Iron oxide scale is the waste product of slab descaling in the steel industry, and it has a high iron content. my country's steel industry discards a large amount of iron oxide scale every year. This material is in large quantities in steel mills, accounting for about 2% to 3% of steel output. It is one of the circulating iron-containing raw materials in steel mills that cannot be ignored. In addition, iron oxide scale can play a good role in melting and cooling in the converter, and is also conducive to early dephosphorization.

[0004] At present, iron oxide scale with a moisture content of less than 1% is directly transported from the rolling mill to the bulk material silo of the steelmaking plant and then used in the converter. However, when it is added into the furnace from the top silo, part of it will be sucked away by the converter flue gas dust removal fan, reducing the recovery rate of iron oxide. Utility Model Content

[0005] The utility model aims to solve the above-mentioned problems and shortcomings and proposes a converter flue for steelmaking: scale chutes are arranged on both sides of the flue pipe, and the fan and the conveying motor are started when the converter is in operation. The conveying motor cooperates with the fan to spray the crushed scale into the flue pipe to prevent the flue dust removal fan from drawing away part of the scale, thereby greatly improving the utilization rate of the scale.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A converter flue for steelmaking comprises a flue pipe, wherein a lime chute and an oxidized iron scale chute are arranged on the outer walls on both sides of one end of the flue pipe, and fixed covers are installed in the lime chute and the oxidized iron scale chute, a conveying pipe is welded to the outer wall at the bottom of one end of the oxidized iron scale chute, and a driving component is connected to the outer wall of one end of the conveying pipe, and a conveying structure is connected to the outer wall of one end of the oxidized iron scale chute; the conveying structure comprises a crushing barrel, a group of crushing rollers rotatably connected to the inner wall of the crushing barrel, a transmission gear connected to the outer wall of one end of the crushing roller, and a feeding pipe connected to the bottom center of the crushing barrel.

[0008] Preferably, the outer wall of the bottom end of the discharge pipe is connected to a feed pipe, and one end of the inner wall of the feed pipe is rotatably connected to a screw conveying shaft, and the other end of the screw conveying shaft is rotatably connected to the center of the inner wall of one end of the iron oxide chute.

[0009] Preferably, a conveying motor is installed on the outer wall of one end of the feeding tube, and the output shaft of the conveying motor is connected to one end of the spiral conveying shaft, a sliding groove is opened on the outer wall of the spiral conveying shaft, and a sealing strip is slidably connected in the sliding groove;

[0010] According to the above scheme: the conveying motor drives the oxidized iron sheet to the oxidized iron sheet chute through the spiral conveying shaft. After the fan is started, the flue gas in the flue pipe is extracted and transported to the conveying pipe. The ejected gas sprays the oxidized iron sheet transported by the spiral conveying shaft into the flue pipe, which is convenient for transportation and ejection and avoids the influence of the fan.

[0011] Preferably, a pulverizing motor is installed on the outer wall of one end of the pulverizing cylinder, and the output shaft of the pulverizing motor is connected to one end of a pulverizing roller, and a transmission gear is installed on the outer wall of one end of the two pulverizing rollers, and the transmission gears are meshed with each other;

[0012] According to the above scheme: the crushing motor drives the crushing roller to rotate through the transmission gear, the crushing roller rotates to crush the iron oxide and falls into the bottom of the crushing cylinder, and the crushed iron oxide enters the feeding pipe through the discharge pipe, which is convenient for crushing and transportation, and improves efficiency and utilization rate.

[0013] Preferably, the outer wall of one end of the feed pipe is connected to the iron oxide scale chute, and one end of the spiral conveying shaft is rotatably connected to the center of the inner wall of the iron oxide scale chute.

[0014] Preferably, the driving assembly includes a fan and a connecting pipe connected to the fan input end, and the fan output end is connected to one end of the delivery pipe, the other end of the connecting pipe is located inside the flue pipe, and one end of the connecting pipe is provided with an interception net.

[0015] Preferably, the fan, conveying motor and crushing motor are connected to a switch via wires, and the switch is connected to a power source via wires.

[0016] The beneficial effects of the utility model are:

[0017] 1. The crushing motor drives the crushing roller to rotate through the transmission gear. The crushing roller crushes the iron oxide and falls into the bottom of the crushing cylinder. The crushed iron oxide enters the feeding pipe through the feeding pipe, which is convenient for crushing and transportation, and improves efficiency and utilization rate;

[0018] 2. The conveying motor drives the oxidized iron sheet to the oxidized iron sheet chute through the spiral conveying shaft. After the fan is started, the flue gas in the flue pipe is extracted and transported to the conveying pipe. The ejected gas sprays the oxidized iron sheet transported by the spiral conveying shaft into the flue pipe, which is convenient for transportation and ejection and avoids the influence of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram of the overall structure of a converter flue for steelmaking proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of a crushing tube of a converter flue for steelmaking proposed by the utility model;

[0021] Figure 3 This is a partially expanded structural schematic diagram of a converter flue for steelmaking proposed by the utility model;

[0022] Figure 4 The utility model is a schematic diagram of a flue pipe structure of a converter flue for steelmaking.

[0023] In the figure: 1 flue pipe, 2 fixed cover, 3 lime chute, 4 iron oxide chute, 5 conveying pipe, 6 conveying structure, 7 crushing cylinder, 8 crushing roller, 9 transmission gear, 10 crushing motor, 11 feeding pipe, 12 feeding pipe, 13 screw conveying shaft, 14 sealing strip, 15 conveying motor, 16 fan, 17 connecting pipe, 18 interception net. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Embodiment 1:

[0026] Reference Figure 1 and Figure 3-4 A converter flue for steelmaking, comprising a flue pipe 1, a lime chute 3 and an oxidized iron scale chute 4 are arranged on the outer walls of both sides of one end of the flue pipe 1, and a fixed cover 2 is installed in the lime chute 3 and the oxidized iron scale chute 4, a conveying pipe 5 is welded to the outer wall of the bottom of one end of the oxidized iron scale chute 4, and a driving component is connected to the outer wall of one end of the conveying pipe 5, and a conveying structure 6 is connected to the outer wall of one end of the oxidized iron scale chute 4;

[0027] The driving assembly includes a fan 16 and a connecting pipe 17 connected to the input end of the fan 16, and the output end of the fan 16 is connected to one end of the delivery pipe 5, the other end of the connecting pipe 17 is located inside the flue pipe 1, and an interception net 18 is provided at one end of the connecting pipe 17. After the fan 16 is started, the gas in the flue pipe 1 is extracted through the delivery pipe 5 and enters the iron oxide chute 4. The delivery pipe 5 is fixed in the delivery pipe 5 in an inclined state. The gas enters the iron oxide chute 4 and sprays the iron oxide particles into the flue pipe 1, which is convenient for conveying the iron oxide particles. The interception net 18 filters the flue gas in the connecting pipe 17;

[0028] The fan 16, the conveying motor 15 and the crushing motor 10 are connected to a switch through a wire, and the switch is connected to a power source through a wire.

[0029] Embodiment 2:

[0030] Reference Figure 1-2 The conveying structure 6 includes a crushing cylinder 7, a group of crushing rollers 8 rotatably connected to the inner wall of the crushing cylinder 7, a transmission gear 9 connected to the outer wall of one end of the crushing roller 8, and a feeding pipe 11 connected to the bottom center of the crushing cylinder 7;

[0031] The outer wall of the bottom end of the feeding pipe 11 is connected to a feeding pipe 12, and one end of the inner wall of the feeding pipe 12 is rotatably connected to a spiral conveying shaft 13, and the other end of the spiral conveying shaft 13 is rotatably connected to the center of the inner wall of one end of the oxidized iron sheet chute 4. During the conveying process, the spiral conveying shaft 13 contacts the inner wall of the feeding pipe 12 through the sealing strip 14, which is convenient for sealing the feeding pipe 12, maintaining the conveying stability, avoiding congestion and leakage, and avoiding smoke backflow;

[0032] A conveying motor 15 is installed on the outer wall of one end of the feeding pipe 12, and the output shaft of the conveying motor 15 is connected to one end of the spiral conveying shaft 13. A sliding groove is provided on the outer wall of the spiral conveying shaft 13, and a sealing strip 14 is slidably connected in the sliding groove. After the conveying motor 15 is started, it drives the spiral conveying shaft 13 to rotate, and the spiral conveying shaft 13 drives the crushed and fallen iron oxide particles to be transported to the iron oxide chute 4. With the spiral conveying shaft 13, the iron oxide particles are in contact with one end of the conveying pipe 5, which is convenient for transportation and auxiliary spraying of the iron oxide particles.

[0033] A pulverizing motor 10 is installed on the outer wall of one end of the pulverizing cylinder 7, and the output shaft of the pulverizing motor 10 is connected to one end of a pulverizing roller 8. A transmission gear 9 is installed on the outer wall of one end of the two pulverizing rollers 8, and the transmission gears 9 are meshed with each other. The pulverizing motor 10 in the pulverizing cylinder 7 drives the pulverizing rollers 8 to rotate through the transmission gear 9. After the pulverizing rollers 8 rotate, the iron oxide scale entering is crushed, so that the iron oxide scale powder or small particles are transported to the feeding pipe 12, which is convenient for crushing and transportation;

[0034] The outer wall of one end of the feeding pipe 12 is connected to the iron oxide scale chute 4, and one end of the spiral conveying shaft 13 is rotatably connected to the center of the inner wall of the iron oxide scale chute 4.

[0035] Working principle: When in use, one end of the feed pipe 12 is connected to one end of the iron oxide chute 4, and the output end of the fan 16 is connected to one end of the conveying pipe 5 to convey the iron oxide to the crushing tube 7. The crushing motor 10 drives the crushing roller 8 to rotate through the transmission gear 9. After the crushing roller 8 rotates, the iron oxide on the top of the crushing tube 7 is crushed and falls into the bottom of the crushing tube 7. The crushed iron oxide enters the feed pipe 12 through the discharge pipe 11. After the conveying motor 15 rotates, the crushed iron oxide is driven by the spiral conveying shaft 13 to be sent to the iron oxide chute 4. After the fan 16 is started, the flue gas in the flue pipe 1 is extracted and conveyed to the conveying pipe 5. The gas ejected from the conveying pipe 5 sprays the iron oxide conveyed by the spiral conveying shaft 13 into the flue pipe 1. The ejected iron oxide fully contacts the flue gas in the flue pipe 1 to prevent the flue gas dust removal fan from sucking away part of it, thereby maintaining the iron oxide recovery rate.

[0036] The exemplary implementation of the utility model is described in detail with reference to the examples, however, it is understood by those skilled in the art that, without departing from the concept of the utility model, various modifications and alterations may be made to the above-mentioned specific embodiments, and various combinations of the various technical features and structures proposed in the utility model may be made without exceeding the scope of protection of the utility model, which is determined by the attached claims. The foregoing description of the specific exemplary implementation of the utility model is not intended to limit the utility model to the precise form disclosed, and it is obvious that many changes and variations can be made according to the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary implementations of the utility model and various different choices and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A converter flue for steelmaking, comprising a flue pipe (1), characterized in that: A lime chute (3) and an oxidized iron sheet chute (4) are provided on the outer walls of both sides of one end of the flue pipe (1), and a fixed cover (2) is installed in the lime chute (3) and the oxidized iron sheet chute (4), a conveying pipe (5) is welded to the outer wall of the bottom of one end of the oxidized iron sheet chute (4), and a driving component is connected to the outer wall of one end of the conveying pipe (5), and a conveying structure (6) is connected to the outer wall of one end of the oxidized iron sheet chute (4); The conveying structure (6) comprises a crushing cylinder (7), a group of crushing rollers (8) rotatably connected to the inner wall of the crushing cylinder (7), a transmission gear (9) connected to the outer wall of one end of the crushing roller (8), and a discharge pipe (11) connected to the bottom center of the crushing cylinder (7).

2. A converter flue for steelmaking according to claim 1, characterized in that: The outer wall of the bottom end of the feed pipe (11) is connected to a feed pipe (12), and one end of the inner wall of the feed pipe (12) is rotatably connected to a screw conveying shaft (13), and the other end of the screw conveying shaft (13) is rotatably connected to the center of the inner wall of one end of the iron oxide chute (4).

3. A converter flue for steelmaking according to claim 2, characterized in that: A conveying motor (15) is installed on the outer wall of one end of the feeding pipe (12), and the output shaft of the conveying motor (15) is connected to one end of the spiral conveying shaft (13). A sliding groove is opened on the outer wall of the spiral conveying shaft (13), and a sealing strip (14) is slidably connected in the sliding groove.

4. The converter flue for steelmaking according to claim 1, characterized in that: A pulverizing motor (10) is installed on the outer wall of one end of the pulverizing cylinder (7), and the output shaft of the pulverizing motor (10) is connected to one end of a pulverizing roller (8). Transmission gears (9) are installed on the outer walls of one end of the two pulverizing rollers (8), and the transmission gears (9) are meshed with each other.

5. The converter flue for steelmaking according to claim 2, characterized in that: The outer wall of one end of the feeding pipe (12) is connected to the iron oxide scale chute (4), and one end of the spiral conveying shaft (13) is rotatably connected to the center of the inner wall of the iron oxide scale chute (4).

6. The converter flue for steelmaking according to claim 1, characterized in that: The driving assembly comprises a fan (16) and a connecting pipe (17) connected to an input end of the fan (16), and the output end of the fan (16) is connected to one end of a delivery pipe (5), the other end of the connecting pipe (17) is located inside the flue pipe (1), and an interception net (18) is provided at one end of the connecting pipe (17).

7. The converter flue for steelmaking according to claim 6, characterized in that: The fan (16), the conveying motor (15) and the crushing motor (10) are connected to a switch via a wire, and the switch is connected to a power source via a wire.

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