Device for preheating lump ore by using vertical furnace

Abstract

The invention relates to the technical field of lump ore preheating, in particular to a lump ore preheating device through a vertical furnace, which comprises a feeding conveyor belt support and a feeding conveyor belt, the feeding conveyor belt is mounted on the inner wall of the feeding conveyor belt support, and the upper tail end position of the feeding conveyor belt corresponds to the vertical furnace on one side. Chain plate machines are arranged below the shaft furnaces on the two sides, and a blast furnace feeding conveying belt is distributed below the other side of the belt cooler. Through the cooperation of the belt cooler, the feeding conveying belt, the chain plate machine, the shaft furnaces and the blast furnace feeding conveying belt, lump ores are discharged into the chain plate machine through the vibrating feeder and then enter the belt cooler to be mixed with hot materials, and the heated lump ores enter the blast furnace ore tank through the conveying belt and then enter the blast furnace. And one shaft furnace is stopped. The operation is simple, the blast furnace heat consumption of the heated lump ore is greatly reduced, the coke ratio is reduced, and the energy consumption is saved.

Description

Technical Field

[0001] The invention relates to the technical field of lump ore preheating, in particular to a device for preheating lump ore using a hard furnace. Background Art

[0002] In existing blast furnaces, finished ore is transported from the shaft furnace to the ore chute via a belt conveyor before being added to the blast furnace. During cold winter weather, the surface temperature of the ore is often below 0°C. This cool material absorbs significant heat, causing temperature fluctuations within the furnace. Increasing the coke ratio increases the heat required to heat the charge within the blast furnace. Furthermore, during actual operation, it is impossible to effectively monitor the ore temperature and appearance to ensure that they meet standards for accurate charge quality control.

[0003] With this patented process, the lump ore is heated in an idle vertical furnace, discharged via a vibrating feeder into a chain conveyor, and then mixed with the hot charge in a belt cooler. This hot charge is then heated to over 100°C in the belt cooler. When the hot lump ore is fed into the blast furnace, it already carries a significant amount of physical heat, reducing the amount of heat required to heat the charge within the blast furnace. This physical heat is directly converted into the effective heat required for smelting, improving the blast furnace's thermal efficiency, reducing the coke ratio, and saving energy. Summary of the Invention

[0004] The present invention aims to address the problem that the cool charge entering the blast furnace absorbs a large amount of heat, causing temperature fluctuations within the furnace. Increasing the coke ratio increases the heat consumption required to heat the charge within the blast furnace. Furthermore, during operation, it is impossible to effectively detect whether the lump ore temperature and appearance meet the standards to accurately control the quality of the blast furnace charge. Therefore, a device is proposed to preheat the lump ore using a blast furnace.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device is designed to preheat lump ore using a blast furnace, including a feeding conveyor belt bracket and a feeding conveyor belt. The feeding conveyor belt is installed on the inner wall of the feeding conveyor belt bracket, and universal wheels are installed at the four corners of the lower end of the feeding conveyor belt bracket. A plurality of partitions are fixedly connected to the outer wall of the feeding conveyor belt. The upper end position of the feeding conveyor belt corresponds to the vertical furnace on one side, and chain conveyors are provided under the vertical furnaces on both sides. Belt coolers are distributed on the inner and lower sides of the chain conveyors on both sides, and the blast furnace feeding conveyor belt is distributed under the other side of the belt cooler.

[0007] Preferably, a belt cooler bracket is installed on the outer wall of the belt cooler, and a blast furnace charging conveyor bracket is installed on the outer wall of the blast furnace charging conveyor.

[0008] Preferably, a feed port is provided at the center of the upper end of the vertical furnace, and a discharge port is provided at the center of the lower end of the vertical furnace.

[0009] Preferably, the outer wall of the blast furnace feeding conveyor belt support is provided with a screening component, and the screening component includes a horizontal plate, and a plurality of the horizontal plates are fixedly connected to both sides of the outer wall of the blast furnace feeding conveyor belt support. The upper end of the horizontal plate is fixedly connected to the self-locking cylinder through the cylinder bracket, and the end of the output shaft of the self-locking cylinder is fixedly connected to the push plate, and the outer wall of the output shaft of the self-locking cylinder is fixedly connected to the push plate through the side frame.

[0010] Preferably, an air inlet is fixedly connected to one side of the upper outer wall of the vertical furnace, and a flange is installed on the outer wall of the air inlet.

[0011] Preferably, a plurality of inclined beams are installed on the outer wall of the vertical furnace.

[0012] Preferably, a plurality of cooling structure mounting brackets are equidistantly mounted above the outer wall with the cooling machine bracket.

[0013] Preferably, the chain conveyor is installed on the inner wall of the chain conveyor bracket.

[0014] The device for preheating lump ore using a hardening furnace proposed by the present invention has the following beneficial effects:

[0015] Through the coordination among the belt cooler, charging conveyor, chain conveyor, vertical furnace and blast furnace charging conveyor, two vertical furnaces can share one belt cooler, and one vertical furnace can be shut down. This patented design mainly adopts the vertical furnace charging system, that is, the charging conveyor transports the lump ore to the vertical furnace, and after the vibrating feeder discharges the lump ore into the chain conveyor, it enters the belt cooler to be mixed with the hot material. The heated lump ore then enters the blast furnace ore chute through the conveyor belt, and finally enters the blast furnace. This patented principle is simple and is suitable for two vertical furnaces sharing one belt cooler, and one vertical furnace can be shut down. The operation is simple, and the heated lump ore will greatly reduce the heat consumption of the blast furnace, reduce the coke ratio, and save energy.

[0016] Through the coordination among the belt cooler, blast furnace charging conveyor, push plate, self-locking cylinder and side frame, the lump ore is transported to the blast furnace charging conveyor after mixing at the belt cooler. The external CCD camera or temperature sensor and other sensors that require specific detection data can be used to detect whether the lump ore is damaged or whether the temperature meets the standard. If the value does not correspond to the corresponding value required for entering the blast furnace, the corresponding self-locking cylinder output shaft can be extended through signal control, and the push plate can be pushed to push the lump ore off the blast furnace charging conveyor, and a collection box can be placed at the corresponding pushing-down position for collection. In this way, the problem of not being able to determine whether the temperature and appearance of the lump ore meet the standard after effective detection to accurately control the quality of blast furnace charging can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front appearance of the present invention;

[0018] Figure 2This is a schematic diagram of the rear appearance of the present invention;

[0019] Figure 3 For the present invention Figure 2 Schematic diagram of the local structure in;

[0020] Figure 4 For the present invention Figure 3 The left structural diagram in ;

[0021] Figure 5 For the present invention Figure 2 Schematic diagram of the feeding conveyor belt structure;

[0022] Figure 6 For the present invention Figure 1 Schematic diagram of the feeding conveyor belt structure;

[0023] Figure 7 For the present invention Figure 2 Schematic diagram of the top view structure in ;

[0024] Figure 8 For the present invention Figure 1 Schematic diagram of the main view structure in .

[0025] In the figure: 1. Feeding conveyor belt bracket, 2. Feeding conveyor belt, 3. Screening assembly, 301. Side frame, 302. Push plate, 303. Self-locking cylinder, 304. Cross plate, 305. Cylinder bracket, 4. Universal wheel, 5. Chain conveyor bracket, 6. Chain conveyor, 7. Inclined beam, 8. Vertical furnace, 9. Blast furnace feeding conveyor belt bracket, 10. Blast furnace feeding conveyor belt, 11. Feed inlet, 12. Air inlet, 13. Discharge port, 14. Partition, 15. Belt cooler, 16. Belt cooler bracket, 17. Cooling structure mounting bracket. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings:

[0027] Refer to the attached Figure 1-8 : In this embodiment, a device for preheating lump ore using a blast furnace includes a feeding conveyor belt bracket 1 and a feeding conveyor belt 2. The inner wall of the feeding conveyor belt bracket 1 is installed with a feeding conveyor belt 2. The four corners of the lower end of the feeding conveyor belt bracket 1 are installed with universal wheels 4. The universal wheels 4 can adopt a universal wheel structure with brakes. The outer wall of the feeding conveyor belt 2 is fixed with multiple partitions 14. The partitions 14 are used to gradually push the lump ore upward. The upper end position of the feeding conveyor belt 2 corresponds to the vertical furnace 8 on one side. A chain plate machine 6 is provided below the vertical furnaces 8 on both sides. The model of the chain plate machine 6 can be determined according to the specific usage. A belt cooler 15 is distributed on the inner and lower sides of the chain plate machines 6 on both sides. The model of the belt cooler 15 can be determined according to the specific usage. The blast furnace feeding conveyor belt 10 is distributed below the other side of the belt cooler 15.

[0028] Refer to the attached Figure 1-8 : In this embodiment, a belt cooler bracket 16 is installed on the outer wall of the belt cooler 15, a blast furnace charging conveyor bracket 9 is installed on the outer wall of the blast furnace 8, a feeding port 11 is opened at the center of the upper end of the vertical furnace 8, and the vertical furnace 8 can be fed with lump ore through the feeding port 11. A discharge port 13 is opened at the center of the lower end of the vertical furnace 8, and an air inlet 12 is fixedly connected to one side above the outer wall of the vertical furnace 8. The air inlet 12 is used to inject high-temperature gas into the vertical furnace 8 for heating. A flange is installed on the outer wall of the air inlet 12, and a plurality of inclined beams 7 are installed on the outer wall of the vertical furnace 8. A plurality of cooling structure mounting brackets 17 are equidistantly installed above the outer wall of the belt cooler bracket 16. The cooling structure mounting bracket 17 can be used to install the corresponding cooling structure (air cooling), and an insulation cover can be installed on the outer wall of the cooling structure mounting bracket 17. The chain conveyor 6 is installed on the inner wall of the chain conveyor bracket 5.

[0029] Refer to the attached Figure 1-8 : In this embodiment, a screening component 3 is provided on the outer wall of the blast furnace feeding conveyor belt bracket 9, and the screening component 3 includes a horizontal plate 304. Multiple horizontal plates 304 are fixedly connected on both sides of the outer wall of the blast furnace feeding conveyor belt bracket 9. The upper end of the horizontal plate 304 is fixedly connected to the self-locking cylinder 303 through the cylinder bracket 305. The model of the self-locking cylinder 303 can be determined according to the specific usage. The end of the output shaft of the self-locking cylinder 303 is fixedly connected with a push plate 302. The push plate 302 can push the lump ore off the blast furnace feeding conveyor belt 10. The outer wall of the output shaft of the self-locking cylinder 303 is fixedly connected to the push plate 302 through the side frame 301.

[0030] Working principle:

[0031] When it is necessary to use this device for preheating lump ore using a blast furnace, first, the user can use a bucket car to transport the lump ore to the charging conveyor belt 2, and then the lump ore is transported to the upper end feeding port 11 of the vertical furnace 8 through the continuous transportation of the partition 14 on the surface of the charging conveyor belt 2. The heating gas is connected through the idle vertical furnace 8 and injected through the air inlet pipe 12 to heat the lump ore. Then, the vibrating feeder below the vertical furnace 8 discharges the lump ore from the discharge port 13 into the lower chain plate conveyor 6. The chain plate conveyor 6 sends the discharged lump ore to the lower belt cooler 15, where it is mixed with the hot pellet ore, and finally transported to the blast furnace through the blast furnace charging conveyor for subsequent processing.

[0032] This case applies to two shaft furnaces sharing a belt cooler 15, with one shaft furnace 8 out of service. This patented design primarily utilizes a shaft furnace charging system, whereby a charging conveyor belt 2 transports lump ore to the shaft furnace 8. After a vibrating feeder discharges the lump ore into a chain conveyor 6, it enters a belt cooler 15 for mixing with the hot material. The heated lump ore then flows through a conveyor belt into the blast furnace ore chute and, ultimately, the blast furnace. This patented design is simple in principle and applicable to two shaft furnaces sharing a belt cooler, with one shaft furnace out of service. Operation is simple, and the heated lump ore significantly reduces the blast furnace's heat consumption, lowers the coke ratio, and conserves energy.

[0033] At the same time, after the lump ore is mixed at the belt cooler 15, it is transported to the blast furnace charging conveyor 10. The external CCD camera or temperature sensor or other sensors that require specific detection data can be used to detect whether the lump ore is damaged or whether the temperature meets the standard (the working principle of the external CCD camera or temperature sensor is a mature existing technology and a suitable model can be selected). If the value does not correspond to the corresponding value required for entering the blast furnace, the corresponding self-locking cylinder output shaft can be extended through signal control to push the push plate 302 to push the lump ore off the blast furnace charging conveyor 10, and a collection box can be placed at the corresponding pushing position for collection. In this way, the problem of not being able to determine whether the temperature and appearance of the lump ore meet the standard after effective detection can be effectively avoided to accurately control the quality of the blast furnace charge. Finally, the specific control process of the chain conveyor, belt cooler, conveyor belt and self-locking cylinder structure in this case can be started and stopped and linked by the PLC controller.

[0034] Although the invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A device for preheating lump ore using a hard furnace, comprising a feeding conveyor belt support (1) and a feeding conveyor belt (2), wherein the feeding conveyor belt (2) is installed on the inner wall of the feeding conveyor belt support (1), and is characterized in that: Universal wheels (4) are installed at the four corners of the lower end of the feeding conveyor belt bracket (1), a plurality of partitions (14) are fixedly connected to the outer wall of the feeding conveyor belt (2), the upper end position of the feeding conveyor belt (2) corresponds to the vertical furnace (8) on one side, and chain plate machines (6) are arranged below the vertical furnaces (8) on both sides, and belt coolers (15) are distributed below the inner sides of the chain plate machines (6) on both sides, and a blast furnace feeding conveyor belt (10) is distributed below the other side of the belt cooler (15).

2. The device for preheating lump ore using a hardening furnace according to claim 1, characterized in that: The outer wall of the belt cooler (15) is installed with a belt cooler bracket (16), and the outer wall of the blast furnace charging conveyor belt (10) is installed with a blast furnace charging conveyor belt bracket (9).

3. The device for preheating lump ore using a hardening furnace according to claim 1, characterized in that: A feed port (11) is provided at the center of the upper end of the vertical furnace (8), and a discharge port (13) is provided at the center of the lower end of the vertical furnace (8).

4. The device for preheating lump ore using a hard furnace according to claim 2, characterized in that: The outer wall of the blast furnace feeding conveyor belt support (9) is provided with a screening assembly (3), and the screening assembly (3) includes a transverse plate (304). A plurality of the transverse plates (304) are fixedly connected to both sides of the outer wall of the blast furnace feeding conveyor belt support (9). The upper end of the transverse plate (304) is fixedly connected to the self-locking cylinder (303) through a cylinder support (305). The end of the output shaft of the self-locking cylinder (303) is fixedly connected to a push plate (302). The outer wall of the output shaft of the self-locking cylinder (303) is fixedly connected to the push plate (302) through a side frame (301).

5. The device for preheating lump ore using a hardening furnace according to claim 1, characterized in that: An air inlet (12) is fixedly connected to one side of the upper outer wall of the vertical furnace (8), and a flange is installed on the outer wall of the air inlet (12).

6. The device for preheating lump ore using a hardening furnace according to claim 1, characterized in that: The outer wall of the vertical furnace (8) is equipped with a plurality of inclined beams (7).

7. The device for preheating lump ore using a hardening furnace according to claim 2, characterized in that: A plurality of cooling structure mounting brackets (17) are equidistantly mounted above the outer wall of the cooling machine bracket (16).

8. The device for preheating lump ore using a hardening furnace according to claim 1, characterized in that: The chain conveyor (6) is installed on the inner wall of the chain conveyor bracket (5).

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