Dry coating system for gas-based shaft furnace ore raw materials

Abstract

The utility model provides a dry coating system for gas-based shaft furnace ore raw materials, which relates to the blast furnace smelting technology, the dry coating system comprises a conveying belt, a feeding mechanism and at least one coating mechanism, the feeding mechanism is arranged at one end of the conveying belt and conveys to-be-coated ore to the conveying belt, the coating mechanism is arranged above the conveying belt, and the feeding mechanism is arranged above the conveying belt and used for conveying the to-be-coated ore to the coating mechanism. The coating mechanism comprises a vibrating feeder, a spray head and a stirring pear which are sequentially arranged in the conveying direction of the conveying belt, the vibrating feeder sprays paint to the to-be-coated ore, the spray head sprays water to the to-be-coated ore, and the stirring pear stirs the to-be-coated ore. The dry-method coating system for the ore raw materials of the gas-based shaft furnace can control the thickness of a coating layer of the ore raw materials and provide qualified raw materials entering the furnace for the gas-based shaft furnace.

Description

Technical Field

[0001] The utility model relates to blast furnace smelting technology, in particular to a dry coating system for gas-based vertical furnace ore raw materials. Background Art

[0002] Traditional blast furnace ironmaking technology has been very mature after long-term development, but it also has inherent shortcomings, namely, it has a strong dependence on metallurgical coke, and the emission of large amounts of carbon dioxide and other harmful gases during the blast furnace smelting process has become one of the important causes of environmental pollution. At present, direct reduction non-blast furnace ironmaking technology is mostly used to solve the above environmental pollution problems.

[0003] The hydrogen metallurgical direct reduction vertical furnace is a commonly used equipment for direct reduction non-blast furnace ironmaking technology. The hydrogen metallurgical direct reduction vertical furnace uses pellets or lump ore as raw materials and is directly added from the top of the furnace, and the reduced sponge iron is discharged from the bottom of the furnace. In the direct reduction technology, the bonding of iron-containing charge is a major problem of the technology. One of the solutions is to apply a layer of coating on the surface of the pellets entering the furnace to prevent the pellets from bonding during the reaction process in the furnace. For example, the patent (a production system for COREX vertical furnace coated pellets, application number 201610693418.4) discloses a production system for vertical furnace coated pellets, which includes a pellet roasting furnace, a conveying mechanism, a spraying mechanism, etc. The pellets are heated by the roasting system, and the heated pellets enter the spraying system through the conveying system for spraying. However, since the roasting system is included in the above-mentioned prior art, the process is complicated, and there is no coating amount control device, there are certain defects.

[0004] In view of this, the inventors, based on many years of experience in production design in this field and related fields, have designed a dry coating system for gas-based shaft furnace ore raw materials through repeated experiments, in order to solve the problems existing in the prior art. Utility Model Content

[0005] The utility model provides a dry coating system for gas-based vertical furnace ore raw materials, which can control the coating layer thickness of the ore raw materials and provide qualified furnace-entering raw materials for the gas-based vertical furnace.

[0006] To achieve the above-mentioned purpose, the utility model proposes a dry coating system for gas-based vertical furnace ore raw materials, wherein the dry coating system includes a conveyor belt, a material feeding mechanism and at least one coating mechanism, the material feeding mechanism is arranged at one end of the conveyor belt and conveys the ore to be coated to the conveyor belt, the coating mechanism is arranged above the conveyor belt, and the coating mechanism includes a vibrating feeder, a nozzle and a stirring pear arranged in sequence along the conveying direction of the conveyor belt, the vibrating feeder sprays coating on the ore to be coated, the nozzle sprays water on the ore to be coated, and the stirring pear stirs the ore to be coated.

[0007] As described above, the dry coating system for gas-based shaft furnace ore raw materials further includes a storage mechanism and a feeding mechanism, wherein the storage mechanism stores the coating, and the feeding mechanism is respectively connected to the storage mechanism and the vibrating feeder and transports the coating stored in the storage mechanism to the vibrating feeder.

[0008] As described above, the dry coating system for gas-based vertical furnace ore raw materials, wherein the storage mechanism includes a coating silo, a coating delivery pipeline, a silo support and a weighing device, the coating silo is hollow inside and forms a storage cavity, the coating silo is installed on the silo support, the weighing device is arranged between the coating silo and the silo support and measures the weight of the coating silo, and the coating delivery pipeline is connected to the coating silo and delivers coating to the storage cavity.

[0009] As described above, in the dry coating system for gas-based shaft furnace ore raw materials, the storage mechanism further comprises a dust collector, which is disposed on the top of the coating silo and communicated with the storage chamber.

[0010] As described above, in the dry coating system for gas-based shaft furnace ore raw materials, the bottom end of the storage cavity gradually decreases in diameter and is provided with a storage port, and at least one vibration device is provided on the outer wall of the coating silo.

[0011] The dry coating system for gas-based shaft furnace ore raw materials as described above, wherein the vibration device is an air cannon.

[0012] The dry coating system for gas-based vertical furnace ore raw materials as described above, wherein the feeding mechanism includes a silo loosener and at least one feeding unit, the silo loosener is cylindrical and has a discharge cavity that passes through from top to bottom, the discharge cavity gradually decreases in diameter from top to bottom, the top end of the discharge cavity is connected to the storage mechanism, the bottom end of the discharge cavity is connected to one end of the feeding unit, and the other end of the feeding unit is connected to the vibrating feeder.

[0013] As described above, the dry coating system for gas-based vertical furnace ore raw materials, wherein the feeding unit includes a first chute, a feeder, and a second chute connected in sequence, the first chute is connected to the silo loosener, the second chute is connected to the vibrating feeder, and a gate valve is also provided between the first chute and the silo loosener.

[0014] As described above, in the dry coating system for gas-based shaft furnace ore raw materials, the nozzle comprises a nozzle body and a water pipe connected to the nozzle body, and the water pipe is provided with an electric valve.

[0015] The dry coating system for gas-based vertical furnace ore raw materials as described above, wherein the dry coating system also includes a control unit and a humidity sensor, the humidity sensor is arranged above the material incoming mechanism and measures the humidity of the ore to be coated conveyed by the material incoming mechanism, the control unit is electrically connected to the humidity sensor and the electric valve respectively, and the control unit controls the opening of the electric valve according to the humidity measured by the humidity sensor.

[0016] Compared with the prior art, the utility model has the following characteristics and advantages:

[0017] The utility model proposes a dry coating system for gas-based vertical furnace ore raw materials. The coating mechanism sprays coating to the coated ore through a vibrating feeder and sprays water to the ore to be coated through a nozzle. Since the coating and water are mixed with the ore respectively, the coating is evenly achieved through stirring. The amount of coating and water can be adjusted at any time. The thickness of the ore coating layer can be effectively controlled according to the actual situation of the ore to be coated, thereby providing qualified raw materials for the gas-based vertical furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0019] Figure 1 A schematic diagram of a dry coating system for gas-based shaft furnace ore raw materials proposed in the utility model;

[0020] Figure 2 It is a schematic diagram of the feeding mechanism in the utility model;

[0021] Figure 3 It is a schematic diagram of the coating mechanism in the utility model;

[0022] Figure 4 It is a schematic diagram of the material storage mechanism in the utility model.

[0023] Description of reference numerals:

[0024] 100. Dry coating system; 10. Conveyor belt;

[0025] 20. Material supply mechanism; 30. Coating mechanism;

[0026] 31. Vibrating feeder; 32. Sprinkler;

[0027] 322. Water pipe;

[0028] 33. Stirring pears; 40. Feeding mechanism;

[0029] 41. Bin loosener; 42. Feeding unit;

[0030] 421. first slide pipe; 422. feeder;

[0031] 423, second slide pipe; 424, gate valve;

[0032] 50. Material storage mechanism; 51. Paint silo;

[0033] 52. Paint delivery pipeline; 53. Silo support;

[0034] 54. Weighing device; 55. Dust collector;

[0035] 56. Vibration device; 60. Humidity sensor. DETAILED DESCRIPTION

[0036] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be considered to belong to the scope of the present invention.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0038] The utility model provides a dry coating system 100 for gas-based shaft furnace ore raw materials, such as Figures 1 to 4 As shown, the dry coating system 100 includes a conveyor belt 10, a material supply mechanism 20 and at least one coating mechanism 30. The material supply mechanism 20 is arranged at one end of the conveyor belt 10 and transports the ore to be coated to the conveyor belt 10. The coating mechanism 30 is arranged above the conveyor belt 10. The coating mechanism 30 includes a vibrating feeder 31, a nozzle 32 and a stirring pear 33 which are sequentially arranged along the conveying direction of the conveyor belt 10. The vibrating feeder 31 sprays paint on the ore to be coated, the nozzle 32 sprays water on the ore to be coated, and the stirring pear 33 stirs the ore to be coated.

[0039] The utility model proposes a dry coating system 100 for gas-based vertical furnace ore raw materials. The coating mechanism 30 sprays the coating to the coated ore through the vibrating feeder 31, and sprays water to the ore to be coated through the nozzle 32. Since the coating and water are mixed with the ore respectively, the coating is evenly achieved through the stirring pear 33. The amount of coating and water can be adjusted at any time. The thickness of the ore coating layer can be effectively controlled according to the actual situation of the ore to be coated, thereby providing qualified raw materials for the gas-based vertical furnace.

[0040] In an optional embodiment of the present invention, the dry coating system 100 also includes a storage mechanism 50 and a feeding mechanism 40, the storage mechanism 50 stores the paint, and the feeding mechanism 40 is respectively connected to the storage mechanism 50 and the vibrating feeder 31 and transports the paint stored in the storage mechanism 50 to the vibrating feeder 31.

[0041] In an optional example of this embodiment, the storage mechanism 50 includes a paint silo 51, a paint delivery pipeline 52, a silo support 53 and a weighing device 54. The paint silo 51 is hollow inside and has a storage cavity. The paint silo 51 is mounted on the silo support 53. The silo support 53 is located on a platform through a weighing device 54. The weighing device 54 measures the weight of the paint silo 51. The paint delivery pipeline 52 is connected to the paint silo 51 and delivers paint to the storage cavity. With the above structure, the paint delivery pipeline 52 is used to deliver the paint for ore coating to the paint silo 51. When the weighing device 54 detects that the weight value in the storage cavity is lower than the set value, the paint is injected into the storage chamber through the paint delivery pipeline 52.

[0042] In an optional example, three groups of weighing devices 54 are evenly arranged along the circumference of the paint silo 51 to achieve stability of the paint silo and accuracy of weighing.

[0043] In an optional example of this embodiment, the material storage mechanism 50 further includes a dust collector 55, which is disposed on the top of the paint silo 51 and communicated with the material storage chamber.

[0044] In an optional example of this embodiment, the bottom end of the storage chamber gradually decreases in diameter and forms a cone section, a discharge port is provided at the bottom of the cone section, the discharge port is connected to the feeding mechanism 40, and at least one vibration device 56 is provided on the outer wall of the cone section for clearing the storage chamber and assisting the flow when the paint in the storage chamber is blocked.

[0045] In this optional example, the number of the vibration devices 56 can be 4, arranged in pairs, for a total of 2 groups. With the above structure, two opposite groups form a group and are located at the same elevation. The two groups are respectively arranged at different elevations to increase the range of action of the vibration device 56.

[0046] It should be noted that multiple groups of vibration devices 56 can be arranged around the outer wall of the paint silo 51, and each group can be arranged at a different elevation to increase the range of action of the air cannon. The above number is only for example and does not constitute a limitation.

[0047] In an optional example, the vibration device 56 is an air cannon.

[0048] In an optional embodiment of the present invention, the feeding mechanism 40 includes a silo loosener 41 and at least one feeding unit 42. The silo loosener 41 is cylindrical and has a discharge cavity that passes through from top to bottom. The discharge cavity gradually decreases in diameter from top to bottom. The top of the discharge cavity is connected to the storage mechanism 50, and the bottom of the discharge cavity is connected to one end of the feeding unit 42. The other end of the feeding unit 42 is connected to the vibrating feeder 31. With the above structure, the upper part of the silo loosener 41 is fixedly connected to the conical discharge port of the paint silo 51 to prevent the paint silo 51 from being blocked.

[0049] In an optional example of this embodiment, the feeding unit 42 includes a first slide pipe 421, a feeder 422 and a second slide pipe 423 connected in sequence, the first slide pipe 421 is connected to the silo loosener 41, the second slide pipe 423 is connected to the vibrating feeder 31, and a gate valve 424 is also arranged between the first slide pipe 421 and the silo loosener 41.

[0050] In an optional example, the feeder 422 is a screw feeder having a material flow control function, and is capable of controlling the amount of coating material entering the downstream.

[0051] In an optional example of this embodiment, two coating mechanisms 30 are arranged above the conveyor belt 10, and the feeding mechanism 40 includes two feeding units 42. The two feeding units 42 are connected to two first slide pipes 421 respectively.

[0052] In an optional embodiment of the present invention, the nozzle 32 includes a nozzle body and a water pipe 322 connected to the nozzle body, and a flow control device is provided on the water pipe 322.

[0053] In an optional example of this embodiment, the dry coating system 100 further includes a control unit and a humidity sensor 60. The humidity sensor 60 is disposed above the material feeding mechanism 20 and measures the humidity of the ore to be coated delivered by the material feeding mechanism 20. The control unit is electrically connected to the humidity sensor 60 and the electric valve, respectively, and the control unit adjusts the water spraying amount of the nozzle 32 through the flow control device. The humidity sensor 60 is used to detect the humidity of the incoming ore. The control unit determines the water spraying amount of the nozzle 32 according to the measurement result of the humidity sensor 60, and then adjusts the water spraying amount of the nozzle 32 through the flow control device, thereby controlling the coating layer thickness of the ore raw material.

[0054] In an optional example, multiple groups of humidity sensors 60 can be provided to comprehensively measure the humidity value of the incoming ore.

[0055] In an optional example, the control unit is also respectively connected to the feeder 422 and the gate valve 424. The control unit determines the feeding amount of the coating according to the measurement result of the humidity sensor 60, and can further control the coating layer thickness of the ore raw material, thereby providing qualified raw materials for the gas-based vertical furnace.

[0056] In an optional embodiment of the present invention, the conveyor belt 10 is a coating belt machine and is arranged horizontally.

[0057] In an optional embodiment of the utility model, the material feeding mechanism 20 is a material feeding belt conveyor, which is used to convey the ore to be coated to the coating belt conveyor. A humidity sensor 60 is provided at the head of the material feeding belt conveyor, which is used to detect the humidity of the material feeding ore.

[0058] In an optional embodiment of the present invention, the storage mechanism 50, the feeding mechanism 40 and the coating mechanism 30 are arranged from top to bottom.

[0059] The detailed explanation of the above-mentioned embodiments is only intended to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions cannot be interpreted as limitations on the present invention for any reason. In particular, the various features described in different embodiments may also be arbitrarily combined with each other to form other embodiments. Unless there is a clear description to the contrary, these features should be understood to be applicable to any embodiment and are not limited to the described embodiments.

Claims

1. A dry coating system for gas-based shaft furnace ore raw materials, characterized in that: The dry coating system comprises a conveyor belt, a material supply mechanism and at least one coating mechanism, wherein the material supply mechanism is arranged at one end of the conveyor belt and conveys the ore to be coated onto the conveyor belt, the coating mechanism is arranged above the conveyor belt, and the coating mechanism comprises a vibrating feeder, a nozzle and a stirring pear arranged in sequence along the conveying direction of the conveyor belt, the vibrating feeder sprays coating on the ore to be coated, the nozzle sprays water on the ore to be coated, and the stirring pear stirs the ore to be coated; The dry coating system further comprises a storage mechanism and a feeding mechanism, wherein the storage mechanism stores the coating, and the feeding mechanism is respectively connected to the storage mechanism and the vibrating feeder and transports the coating stored in the storage mechanism to the vibrating feeder; The material storage mechanism includes a paint silo, a paint delivery pipeline, a silo support and a weighing device. The paint silo is hollow inside and forms a material storage cavity. The paint silo is installed on the silo support. The weighing device is arranged between the paint silo and the silo support and measures the weight of the paint silo. The paint delivery pipeline is connected to the paint silo and delivers paint to the material storage cavity.

2. The dry coating system for gas-based shaft furnace ore raw materials according to claim 1, characterized in that: The material storage mechanism also includes a dust collector, which is arranged on the top of the paint silo and is connected to the material storage chamber.

3. The dry coating system for gas-based shaft furnace ore raw materials according to claim 1, characterized in that: The bottom end of the material storage cavity gradually decreases in diameter and is provided with a material storage opening. At least one vibration device is arranged on the outer wall of the paint silo.

4. The dry coating system for gas-based shaft furnace ore raw materials according to claim 3, characterized in that: The vibration device is an air cannon.

5. The dry coating system for gas-based shaft furnace ore raw materials according to claim 1, characterized in that: The feeding mechanism includes a silo loosener and at least one feeding unit. The silo loosener is cylindrical and has a discharge cavity that passes through from top to bottom. The discharge cavity gradually decreases in diameter from top to bottom. The top end of the discharge cavity is connected to the storage mechanism, the bottom end of the discharge cavity is connected to one end of the feeding unit, and the other end of the feeding unit is connected to the vibrating feeder.

6. The dry coating system for gas-based shaft furnace ore raw materials according to claim 5, characterized in that: The feeding unit includes a first slide pipe, a feeder and a second slide pipe which are connected in sequence. The first slide pipe is connected to the silo loosener, the second slide pipe is connected to the vibrating feeder, and a gate valve is also arranged between the first slide pipe and the silo loosener.

7. The dry coating system for gas-based shaft furnace ore raw materials according to claim 1, characterized in that: The nozzle comprises a nozzle body and a water pipe connected to the nozzle body, and an electric valve is arranged on the water pipe.

8. The dry coating system for gas-based shaft furnace ore raw materials according to claim 7, characterized in that: The dry coating system also includes a control unit and a humidity sensor. The humidity sensor is arranged above the material feeding mechanism and measures the humidity of the ore to be coated conveyed by the material feeding mechanism. The control unit is electrically connected to the humidity sensor and the electric valve respectively. The control unit controls the opening of the electric valve according to the humidity measured by the humidity sensor.

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