Electric heating plate lifting type iron ore sintering zero-carbon ignition heat preservation device

Abstract

An electric hot plate lifting type iron ore sintering zero-carbon ignition heat preservation device comprises a sintering trolley and an ignition device located above the sintering trolley on the upstream of a sintering machine. The ignition device comprises an ignition heat preservation furnace and a lifting type electric heating plate device arranged on the ignition heat preservation furnace. And the ignition holding furnace is arranged above the sintering pallet. The lifting type electric hot plate device comprises a lifter, a power transmission bearing rod, a resistance hot plate and a lifting motor. The lifter is installed on the upper portion of the furnace top of the ignition holding furnace. And the power transmission bearing rod is arranged on the lifter and penetrates through the lifter and the furnace top of the ignition holding furnace. And the resistance hot plate is arranged above the sintering pallet and is connected with the lower end of the power transmission bearing rod. The lifting motor is connected with the lifter and drives the electricity transmission force bearing rod through the lifter to drive the resistance hot plate to move up and down. According to the utility model, electric heating ignition is adopted, clean and green zero-carbon ignition is realized, the carbon emission is obviously reduced compared with the prior art, the ignition is uniform, and the service life of the furnace lining of the ignition furnace is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to an iron ore sintering ignition and heat preservation device, in particular to an electric heating plate lifting type iron ore sintering zero-carbon ignition and heat preservation device, belonging to the technical field of sintering. Background Art

[0002] During the sintering process, ignition is achieved through a high-temperature flame or atmosphere, igniting the coke powder within the material mixture on the sintering machine's trolley surface. This creates a high-temperature, uniform, red-hot combustion zone. Under the negative pressure of the exhaust from the lower flue, the combustion zone slowly descends, gradually completing the sintering of the sintering mixture at each height unit. Ultimately, when the combustion zone reaches the very bottom of the material layer, the sintering of the material layer carried by the trolley is complete. At this point, the trolley has also moved to the rear of the sintering machine, where it unloads the sintered ore for the next cooling stage. Ignition is a critical and crucial step in the sintering process. Uniform ignition, the quality of the resulting combustion zone, and the longevity of the ignition furnace all determine the quality, energy consumption, and operating efficiency of the entire sintering process.

[0003] The schematic diagram of the existing iron ore sintering ignition and holding furnace is as follows: Figure 1 、 Figure 2 As shown: After the sintering machine trolley is filled with sintering mixture through the nine-roller distributor, it slowly enters the hearth of the ignition furnace. It first enters the ignition section of the ignition furnace and is baked by the high-temperature flame formed by two rows of gas ignition burners in the ignition section. The coke powder in the mixture is gradually ignited to form a red-hot combustion zone; then it enters the insulation section of the ignition furnace and is baked by the medium-temperature flame formed by a row of insulation burners in the insulation section. The purpose is to keep the high-temperature sintered ore that has just been sintered warm and avoid the formation of cold and brittle powder ore due to rapid cooling.

[0004] One end of the top of the ignition furnace gas burner is connected to the gas pipeline. The gas used is generally industrial metallurgical by-product gas, such as blast furnace gas, converter gas, coke oven gas, high-speed mixed gas, high-coke mixed gas, etc., and a small part uses natural gas; the other end is connected to the air pipeline, which introduces the air blown in by the combustion blower and mixes with the gas to form a combustion flame.

[0005] The ignition furnace is generally installed parallel to the sintering machine trolley, located about 100-200mm above the sintering machine trolley railing. It consists of three beams (front beam, middle partition beam, rear beam), two furnace roofs (ignition section furnace roof, insulation section furnace roof) and four side walls (two ignition section side walls, two insulation section side walls). The total length is generally 7-9 meters, of which the ignition section is 3-4 meters and the insulation section is 4-5 meters.

[0006] With the introduction of my country's dual carbon strategy, reducing carbon emissions in the steel industry has become a key requirement for eliminating excess steel production capacity. As a key process in the steelmaking process, sintering carries a significant responsibility for carbon reduction. Currently, sintering still uses traditional coal gas ignition, which suffers from the following three major drawbacks.

[0007] 1. High carbon emissions: Since gas is used for ignition, carbon-containing combustibles such as CO and CH4 in the gas will generate CO2 after combustion, which will be drawn into the flue and then discharged, making the carbon emission index of the sintering process remain high.

[0008] 2. Uneven ignition: Since gas ignition is used, there is an obvious columnar flame. The temperatures of the outer flame, inner flame and flame core are different, and the temperature difference between the areas with flame and those without flame is also large. Therefore, it is very easy to cause uneven ignition of the iron ore sintering material surface, and local over-melting or over-raw phenomena often occur on the material surface, resulting in increased overall sintering energy consumption and increased carbon emissions.

[0009] 3. The life of the ignition furnace lining is short: Since gas ignition is used, the positions of the local high-temperature zone and the local low-temperature zone are relatively constant. The lining that is washed by the high-temperature zone flame for a long time is prone to cracking and peeling, resulting in a short life of the entire ignition furnace lining. Utility Model Content

[0010] To address the existing issues of high carbon emissions, uneven ignition, and short furnace lining life associated with traditional gas ignition in sintering, this utility model has developed a zero-carbon ignition and insulation device for iron ore sintering using a lifting electric heating plate. This solution eliminates the gas burner in the traditional ignition and insulation furnace and adds a lifting electric heating plate device to electrically ignite the sintering material surface. This eliminates the need for additional fossil fuels like gas to ignite the sintering machine, achieving clean, green zero-carbon ignition and significantly reducing carbon emissions compared to existing technologies. Furthermore, the electric heating ignition is more uniform, effectively extending the life of the ignition furnace lining.

[0011] The utility model also adds a biomass solid fuel distributor downstream of the existing sintering mixture distributor, through which the biomass solid fuel is sprayed onto the surface of the sintering mixture, thereby significantly reducing the ignition temperature of the sintering material surface.

[0012] The utility model also adds a pure oxygen blowing device, through which pure oxygen is blown into the furnace of the ignition and holding furnace. The pure oxygen is mixed with the air in the furnace to form an oxygen-rich atmosphere, thereby further reducing the temperature of the combustion zone formed by ignition of biomass solid fuel or coke powder on the sintering material surface, thereby enhancing the ignition and sintering effect.

[0013] The utility model combines electric heat ignition, oxygen-enriched ignition, and biomass surface spraying ignition methods, and does not require additional consumption of fossil energy such as coal gas for ignition. Therefore, the carbon consumption in the iron ore sintering ignition link is almost zero, realizing zero-carbon ignition production in a true sense, and greatly reducing carbon emissions compared with existing technologies.

[0014] According to the implementation scheme of the present utility model, an electric heating plate lifting type iron ore sintering zero-carbon ignition and heat preservation device is provided.

[0015] A zero-carbon ignition and heat preservation device for iron ore sintering using an electric hot plate lift type includes a sintering trolley and an ignition device located above the sintering trolley upstream of a sintering machine. The ignition device includes an ignition and heat preservation furnace and a liftable electric hot plate device disposed on the ignition and heat preservation furnace. The ignition and heat preservation furnace is disposed above the sintering trolley. The liftable electric hot plate device includes a lifter, a current-transmitting load-bearing rod, a resistance heating plate, and a lifter motor. The lifter is mounted on the upper portion of the roof of the ignition and heat preservation furnace. The current-transmitting load-bearing rod is disposed on the lifter and passes through the lifter and the roof of the ignition and heat preservation furnace. The resistance heating plate is disposed above the sintering trolley and is connected to the lower end of the current-transmitting load-bearing rod. The lifter motor is connected to the lifter and drives the current-transmitting load-bearing rod via the lifter to move the resistance heating plate up and down.

[0016] In the present invention, along the running direction of the sintering trolley, the device further comprises a sintering mixture distributor and a biomass solid fuel distributor which are sequentially arranged above the sintering trolley and upstream of the ignition device.

[0017] In the present invention, the device also includes a pure oxygen injection device mounted on the ignition and holding furnace. The pure oxygen injection device includes a pure oxygen pipeline and a pure oxygen nozzle. The pure oxygen pipeline is mounted above the ignition and holding furnace. One end of the pure oxygen nozzle is connected to the pure oxygen pipeline, and the other end extends into the burner flame channel within the top of the ignition and holding furnace.

[0018] In the utility model, along the running direction of the sintering trolley, the ignition and holding furnace is respectively provided with multiple sets of lifting electric heating plate devices and multiple sets of pure oxygen blowing devices.

[0019] Preferably, in the running direction of the sintering trolley, multiple sets of the lifting electric heating plate devices and multiple sets of the pure oxygen blowing devices are arranged alternately with each other.

[0020] In the present invention, the ignition and holding furnace is divided into an ignition section and a holding section along the direction of travel of the sintering trolley. The ignition section is equipped with 1-8 sets of lift-type electric heating plates, preferably 2-4 sets; the holding section is equipped with 1-6 sets of lift-type electric heating plates, preferably 1-3 sets.

[0021] In the present invention, in the running direction of the sintering trolley, 1-8 sets of pure oxygen blowing devices are provided on the ignition section of the ignition and holding furnace, preferably 2-4 sets of pure oxygen blowing devices; 1-6 sets of pure oxygen blowing devices are provided on the holding section, preferably 1-3 sets of pure oxygen blowing devices.

[0022] In the present invention, the resistance heating plate is arranged in parallel above the sintering trolley.

[0023] In the present invention, the resistance heating plate comprises a plate body and resistance heating elements. The plate body is arranged parallel to the sintering trolley and connected to the lower end of the power transmission and bearing rod. The resistance heating elements are evenly arranged on the plate body.

[0024] Preferably, the sintered mixture distributor and the biomass solid fuel distributor are both nine-roller distributors.

[0025] To address the existing issues of high carbon emissions, uneven ignition, and short furnace lining life associated with traditional gas ignition in the sintering ignition process, the present invention improves upon existing technology and structural features to develop a zero-carbon ignition and insulation device for iron ore sintering using an electric heating plate lift. This device eliminates the gas burner in the conventional ignition and insulation furnace and replaces it with a liftable electric heating plate assembly consisting of a lifter, a current-transmitting support rod, a resistance heating plate, and a lift motor. The lifter is mounted on the upper portion of the ignition and insulation furnace roof. The current-transmitting support rod is connected to the lifter and freely moves up and down via a transmission mechanism within the lifter (e.g., a gear transmission, a worm gear transmission, etc.). The resistance heating plate is positioned above the sintering trolley and tightly connected to the lower end of the current-transmitting support rod. The lift motor is connected to the lifter and, through a transmission mechanism within the lifter, provides driving force for the up and down movement of the current-transmitting support rod. As a result, the power transmission bearing rod can move up and down freely under the drive of the lifting motor, so as to freely adjust the vertical distance between the resistance heating plate and the sintering material surface, that is, the lifting electric heating plate device can provide a high-temperature atmosphere for the sintering material surface at a suitable distance or position according to the on-site working conditions for electric ignition. The utility model adopts electric ignition, and the sintering machine does not need to consume additional fossil energy such as coal gas, thus achieving clean and green zero-carbon ignition, and carbon emissions are significantly reduced compared with the existing technology; moreover, electric ignition does not have the columnar flame in traditional gas ignition, so the high temperature, medium temperature and low temperature zones in the furnace of the traditional ignition and insulation furnace no longer exist, and the material surface ignition is more uniform and the quality is more guaranteed; similarly, since the columnar flame disappears, the harsh working conditions of the ignition and insulation furnace lining being locally eroded by high temperature flames and flue gas for a long time are avoided, so the lining life of the ignition and insulation furnace is also effectively extended.

[0026] In order to enhance the ignition uniformity of the sintering material surface, the utility model sets the resistance heating plate in parallel with the sintering trolley (or sintering material surface). The resistance heating plate is composed of a plate body and a resistance heating element. During operation, the resistance heating plate is connected to a power source to realize electric ignition. The shape and structural form of the resistance heating element are not limited, as long as the resistance heating element can achieve uniform ignition of the sintering material surface. For example, the resistance heating element can be in the shape of a long strip, a short strip or a circular ring, and its structural distribution can be Figure 6 、 Figure 7 or Figure 8 in the forms described above or in any other form.

[0027] Preferably, the present invention also incorporates a biomass solid fuel distributor (e.g., a nine-roller distributor) downstream of the existing sinter mix distributor. This distributor sprays granular biomass solid fuel onto the sinter mix surface, blanketing the surface with a layer of biomass solid fuel. This significantly reduces the ignition temperature of the sinter mix. This coating significantly lowers the temperature at which the char powder on the sinter mix ignites, forming the combustion zone. For example, it can be reduced from 1150°C to 800°C or even lower (e.g., 700°C, 600°C, or 500°C).

[0028] Further preferably, the present invention eliminates the existing sintering machine's top air duct system and replaces it with a pure oxygen blowing device. The pure oxygen blowing device consists of a pure oxygen pipe and a pure oxygen nozzle, wherein the pure oxygen pipe is located above the ignition and holding furnace, one end of the pure oxygen nozzle is tightly connected to the pure oxygen pipe, and the other end of the pure oxygen nozzle extends into the burner fire channel of the ignition and holding furnace. In this way, pure oxygen can be blown into the ignition and holding furnace through the pure oxygen pipe and the pure oxygen nozzle. After the pure oxygen mixes with the air in the furnace, an oxygen-rich atmosphere is formed, thereby further reducing the temperature of the biomass solid fuel or coke powder on the sintering material surface to form a combustion zone when it is ignited, for example, from 800°C to about 650°C, or from 700°C to about 570°C, etc. The utility model improves the existing technology and structural form, combines electric heat ignition, oxygen-enriched ignition, and biomass surface spraying ignition methods, and develops an electric-based ignition and insulation device for iron ore sintering. During the ignition process, the sintering machine does not need to consume additional fossil energy such as coal gas, and the carbon consumption in the ignition link is almost zero, realizing clean and green zero-carbon ignition production in a true sense, and greatly reducing carbon emissions compared with existing technologies.

[0029] It should be noted that in order to further enhance the ignition uniformity of the sintering material surface, the utility model arranges multiple sets of lifting electric heating plate devices and multiple sets of pure oxygen blowing devices on the ignition and insulation furnace along the running direction of the sintering trolley. The ignition and insulation furnace is divided into an ignition section and a insulation section, and the ignition section and the insulation section are respectively provided with one or more sets of lifting electric heating plate devices and pure oxygen blowing devices. The set of pure oxygen blowing devices described here includes one or several pure oxygen blowing devices distributed along the width direction of the sintering trolley. When a set of pure oxygen blowing devices includes only one pure oxygen blowing device, the pure oxygen blowing device is correspondingly arranged in the middle position in the width direction of the sintering trolley. When a set of pure oxygen blowing devices includes several pure oxygen blowing devices, the several pure oxygen blowing devices are arranged in a row in the width direction of the sintering trolley and are evenly distributed (such as Figure 5 As shown, the six pure oxygen injection devices arranged in a row constitute one set of pure oxygen injection devices in the direction of the sintering trolley's travel. Accordingly, when multiple sets of pure oxygen injection devices are installed in the ignition section or the holding section, these devices form multiple rows along the direction of the sintering trolley's travel. Similarly, one or more lift-type electric heating plate devices installed in the ignition section or the holding section are arranged in the same manner. This ensures a more uniform arrangement of the lift-type electric heating plate devices and the aforementioned pure oxygen injection devices in the ignition and holding furnace, thereby improving ignition uniformity across the sintering charge surface.

[0030] Among them, in the running direction of the sintering trolley, multiple sets of the lifting electric heating plate devices and multiple sets of the pure oxygen blowing devices are arranged alternately with each other. The staggered arrangement mentioned here means that along the running direction of the sintering trolley, multiple sets of lifting electric heating plate devices and pure oxygen blowing devices provided on the ignition section or the insulation section of the ignition and insulation furnace are arranged alternately with each other, specifically as follows Figure 3 As shown, in the running direction of the sintering trolley, multiple sets of lifting electric heating plate devices are evenly arranged in the ignition section or the insulation section, and multiple sets of pure oxygen blowing devices are respectively set corresponding to the gaps between adjacent lifting electric heating plate devices.

[0031] In the application, the width of the sintering trolley is 0.1-50m, preferably 0.2-30m, more preferably 0.3-20m, and further preferably 0.5-10m. The length of the sintering trolley is 0.1-30m, preferably 0.2-20m, more preferably 0.3-10m, and further preferably 0.5-8m.

[0032] Compared with the prior art, the present invention has the following beneficial technical effects:

[0033] 1. Low carbon emissions: Since the utility model adopts an ignition method that combines electric heat ignition, oxygen-enriched ignition and biomass surface spraying, the sintering machine does not need to consume additional fossil energy such as gas during the ignition process. That is, the carbon consumption of the iron ore sintering ignition link is almost zero, realizing clean and green zero-carbon ignition, and carbon emissions are significantly reduced compared with existing technologies.

[0034] 2. Uniform ignition: Since the utility model adopts electric heat ignition, there is no columnar flame in traditional gas ignition, so the high temperature, medium temperature and low temperature zones in the furnace of the traditional ignition and holding furnace no longer exist, the ignition of the material surface is more uniform, and the quality is more guaranteed.

[0035] 3. Long service life of ignition furnace lining: Similarly, due to the disappearance of columnar flame, the ignition and holding furnace lining is avoided from being locally subjected to long-term harsh working conditions of high-temperature flame and flue gas erosion, so the service life of the ignition furnace lining is also effectively extended.

[0036] In summary, the present invention effectively solves the defects and deficiencies of the prior art without causing any other negative impacts, and has low investment and operating costs. It can be expected to have high application value in the future market. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a simplified structural diagram of an existing iron ore sintering ignition and holding furnace;

[0038] Figure 2 This is a simplified structural diagram of the existing iron ore sintering distributor and ignition holding furnace;

[0039] Figure 3 This is a structural diagram of an electric heating plate lifting type iron ore sintering zero-carbon ignition and heat preservation device of the utility model;

[0040] Figure 4 This is a schematic structural diagram of the lifting electric heating plate device in the utility model;

[0041] Figure 5 This is a schematic structural diagram of the pure oxygen injection device in the present utility model;

[0042] Figure 6 This is a first structural distribution diagram of the resistance heating elements on the plate body in the resistance heating plate of the present invention;

[0043] Figure 7 This is a second structural distribution diagram of the resistance heating elements on the plate body in the resistance heating plate of the present invention;

[0044] Figure 8 This is a third structural distribution diagram of the resistance heating elements on the plate body in the resistance heating plate of the present invention.

[0045] Reference numerals:

[0046] 1: Sintering trolley; 2: Ignition device; 3: Ignition and holding furnace; 301: Ignition section; 302: Holding section; 4: Lifting electric heating plate device; 401: Lifter; 402: Current-transmitting load-bearing rod; 403: Resistance heating plate; 40301: Plate body; 40302: Resistance heating element; 404: Lifting motor; 5: Sintering mixture distributor; 6: Biomass solid fuel distributor; 7: Pure oxygen injection device; 701: Pure oxygen pipeline; 702: Pure oxygen nozzle. DETAILED DESCRIPTION

[0047] The technical solution of the present invention is described below with examples, and the scope of protection requested by the present invention includes but is not limited to the following embodiments.

[0048] According to the implementation scheme of the present utility model, an electric heating plate lifting type iron ore sintering zero-carbon ignition and heat preservation device is provided.

[0049] An electric hot plate lifting type zero-carbon ignition and heat preservation device for iron ore sintering comprises a sintering trolley 1 and an ignition device 2 located above the sintering trolley 1 upstream of the sintering machine. The ignition device 2 comprises an ignition and heat preservation furnace 3 and a lifting electric hot plate device 4 disposed on the ignition and heat preservation furnace 3. The ignition and heat preservation furnace 3 is disposed above the sintering trolley 1. The lifting electric hot plate device 4 comprises a lifter 401, a current-transmitting load-bearing rod 402, a resistance heat plate 403, and a lifting motor 404. The lifter 401 is mounted on the upper portion of the furnace roof of the ignition and heat preservation furnace 3. The current-transmitting load-bearing rod 402 is disposed on the lifter 401 and passes through the lifter 401 and the furnace roof of the ignition and heat preservation furnace 3. The resistance heat plate 403 is disposed above the sintering trolley 1 and is connected to the lower end of the current-transmitting load-bearing rod 402. The lifting motor 404 is connected to the lifter 401 and drives the power transmission load-bearing rod 402 through the lifter 401 to drive the resistance heating plate 403 to move up and down.

[0050] In the present invention, along the running direction of the sintering trolley 1 , the device further includes a sintering mixture distributor 5 and a biomass solid fuel distributor 6 which are sequentially arranged above the sintering trolley 1 and upstream of the ignition device 2 .

[0051] In the present invention, the device further includes a pure oxygen injection device 7 disposed on the ignition and holding furnace 3. The pure oxygen injection device 7 comprises a pure oxygen pipeline 701 and a pure oxygen nozzle 702. The pure oxygen pipeline 701 is disposed above the ignition and holding furnace 3. One end of the pure oxygen nozzle 702 is connected to the pure oxygen pipeline 701, and the other end extends into the burner flame path within the top of the ignition and holding furnace 3.

[0052] In the present invention, along the running direction of the sintering trolley 1, the ignition and holding furnace 3 is provided with multiple sets of lifting electric heating plate devices 4 and multiple sets of pure oxygen blowing devices 7.

[0053] Preferably, in the running direction of the sintering trolley 1 , multiple sets of the lifting electric heating plate devices 4 and multiple sets of the pure oxygen blowing devices 7 are arranged alternately with each other.

[0054] In the present invention, the ignition and holding furnace 3 is divided into an ignition section 301 and a holding section 302 along the direction of travel of the sintering trolley 1. In the direction of travel of the sintering trolley 1, the ignition section 301 is provided with 1 to 8 sets of liftable electric heating plate devices 4, preferably 2 to 4 sets of liftable electric heating plate devices 4; the holding section 302 is provided with 1 to 6 sets of liftable electric heating plate devices 4, preferably 1 to 3 sets of liftable electric heating plate devices 4.

[0055] In the present invention, in the running direction of the sintering trolley 1, 1-8 sets of pure oxygen blowing devices 7 are provided on the ignition section 301 of the ignition and holding furnace 3, preferably 2-4 sets of pure oxygen blowing devices 7; 1-6 sets of pure oxygen blowing devices 7 are provided on the holding section 302, preferably 1-3 sets of pure oxygen blowing devices 7.

[0056] In the present invention, the resistance heating plate 403 is arranged parallel to and above the sintering trolley 1 .

[0057] In the present invention, the resistance heating plate 403 includes a plate body 40301 and resistance heating elements 40302. The plate body 40301 is arranged parallel to the top of the sintering trolley 1 and connected to the lower end of the power transmission and bearing rod 402. The resistance heating elements 40302 are evenly arranged on the plate body 40301.

[0058] Preferably, the sintered mixture distributor 5 and the biomass solid fuel distributor 6 are both nine-roller distributors. Example 1

[0059] like Figure 3-4 As shown, an electric hot plate lifting type zero-carbon ignition and heat preservation device for iron ore sintering comprises a sintering trolley 1 and an ignition device 2 located above the sintering trolley 1 upstream of the sintering machine. The ignition device 2 comprises an ignition and heat preservation furnace 3 and a lifting electric hot plate device 4 disposed on the ignition and heat preservation furnace 3. The ignition and heat preservation furnace 3 is disposed above the sintering trolley 1. The lifting electric hot plate device 4 comprises a lifter 401, a current-transmitting bearing rod 402, a resistance heating plate 403, and a lifting motor 404. The lifter 401 is mounted on the upper portion of the roof of the ignition and heat preservation furnace 3. The current-transmitting bearing rod 402 is disposed on the lifter 401 and passes through the lifter 401 and the roof of the ignition and heat preservation furnace 3. The resistance heating plate 403 is disposed parallel to and above the sintering trolley 1 and is connected to the lower end of the current-transmitting bearing rod 402. The lifting motor 404 is connected to the lifter 401 and drives the power transmission load-bearing rod 402 through the lifter 401 to drive the resistance heating plate 403 to move up and down. Example 2

[0060] Example 1 is repeated, except that along the running direction of the sintering trolley 1 , the device further includes a sintering mixture distributor 5 and a biomass solid fuel distributor 6 which are sequentially arranged above the sintering trolley 1 and upstream of the ignition device 2 . Example 3

[0061] Example 2 is repeated, except that the sintered mixture distributor 5 and the biomass solid fuel distributor 6 are both nine-roller distributors. Example 4

[0062] like Figure 5 As shown, Example 3 is repeated, except that this device also includes a pure oxygen injection device 7 disposed on the ignition and holding furnace 3. The pure oxygen injection device 7 includes a pure oxygen pipeline 701 and a pure oxygen nozzle 702. The pure oxygen pipeline 701 is disposed above the ignition and holding furnace 3. One end of the pure oxygen nozzle 702 is connected to the pure oxygen pipeline 701, and the other end extends into the burner flame channel in the top of the ignition and holding furnace 3. Example 5

[0063] Example 4 was repeated, except that the ignition and holding furnace 3 was divided into an ignition section 301 and a holding section 302 along the direction of travel of the sintering trolley 1. In the direction of travel of the sintering trolley 1, the ignition section 301 was equipped with two liftable electric heating plate devices 4 and two pure oxygen injection devices 7; the holding section 302 was equipped with one liftable electric heating plate device 4 and two pure oxygen injection devices 7. Example 6

[0064] The fifth embodiment is repeated, except that in the running direction of the sintering trolley 1 , multiple sets of the lifting electric heating plate devices 4 and multiple sets of the pure oxygen blowing devices 7 are arranged alternately with each other. Example 7

[0065] Example 5 is repeated, except that in the running direction of the sintering trolley 1, four sets of lifting electric heating plate devices 4 and four sets of pure oxygen blowing devices 7 are provided on the ignition section 301; three sets of lifting electric heating plate devices 4 and three sets of pure oxygen blowing devices 7 are provided on the insulation section 302. Example 8

[0066] Repeat Example 6, except that the resistance heating plate 403 includes a plate body 40301 and a resistance heating element 40302. The plate body 40301 is arranged parallel to the top of the sintering trolley 1 and is connected to the lower end of the power transmission bearing rod 402. The resistance heating element 40302 is in the shape of a long strip, and multiple long strip resistance heating elements 40302 are evenly arranged on the plate body 40301, as shown in FIG. Figure 6 shown. Example 9

[0067] Repeat Example 8, except that the shape of the resistance heating element 40302 is short strip, and the structure of multiple short strip resistance heating elements 40302 on the plate 40301 is arranged as follows: Figure 7 shown. Example 10

[0068] Repeat Example 8, except that the shape of the resistance heating element 40302 is annular, and the structure of multiple annular resistance heating elements 40302 on the plate 40301 is arranged as follows: Figure 8 shown.

[0069] In this embodiment, the working principle of the electric hot plate lifting type iron ore sintering zero-carbon ignition and insulation device is as follows: first, the sintering mixture is evenly arranged on the sintering trolley 1 using the sintering mixture distributor 5. After the distribution is completed, the solid fuel made of biomass is sprayed on the surface of the sintering mixture through the biomass solid fuel distributor 6, so that the surface of the sintering mixture is covered with a layer of biomass solid fuel, thereby significantly reducing the ignition temperature of the surface. Then, the lifting type electric hot plate device 4 is used to perform electric ignition and sintering on the sintering surface. In the process of igniting and sintering the sintering surface, the pure oxygen blowing device 7 is simultaneously used to blow pure oxygen into the furnace of the ignition and insulation furnace 3. The pure oxygen is mixed with the air in the furnace to form an oxygen-rich atmosphere, thereby further reducing the temperature of the sintering surface to be ignited to form a combustion zone.

[0070] Moreover, during the ignition process of the lifting electric heating plate device 4, the lifting motor 404 can also drive the power transmission bearing rod 402 through the lifter 401 to drive the resistance heating plate 403 to move up and down, thereby freely adjusting the vertical distance between the resistance heating plate 403 and the sintering material surface, that is, the lifting electric heating plate device 4 can provide a high-temperature atmosphere for the sintering material surface at a suitable distance or position according to the on-site working conditions for electric heating ignition, thereby improving the uniformity of the material surface ignition and enhancing the ignition and sintering effect.

Claims

1. An electric heating plate lifting type iron ore sintering zero-carbon ignition and heat preservation device, characterized by: The device comprises a sintering trolley (1), an ignition device (2) located above the sintering trolley (1) upstream of a sintering machine; the ignition device (2) comprises an ignition and heat preservation furnace (3) and a lifting electric heating plate device (4) arranged on the ignition and heat preservation furnace (3); wherein the ignition and heat preservation furnace (3) is arranged above the sintering trolley (1); the lifting electric heating plate device (4) comprises a lifter (401), a power transmission bearing rod (402), a resistance heating plate (403), and a lifting motor (404); the lifter (401) is provided with a plurality of electric heating plates, wherein the electric heating plates are ... 01) is installed on the top of the ignition and heat preservation furnace (3); the power transmission bearing rod (402) is arranged on the lifter (401) and passes through the lifter (401) and the top of the ignition and heat preservation furnace (3); the resistance heating plate (403) is arranged above the sintering trolley (1) and is connected to the lower end of the power transmission bearing rod (402); the lifting motor (404) is connected to the lifter (401) and drives the power transmission bearing rod (402) through the lifter (401) to drive the resistance heating plate (403) to move up and down.

2. The device according to claim 1, characterized in that: Along the running direction of the sintering trolley (1), the device further comprises a sintering mixture distributor (5) and a biomass solid fuel distributor (6) which are sequentially arranged above the sintering trolley (1) and upstream of the ignition device (2).

3. The device according to claim 1 or 2, characterized in that: The device further comprises a pure oxygen blowing device (7) arranged on the ignition and heat-holding furnace (3); the pure oxygen blowing device (7) comprises a pure oxygen pipeline (701) and a pure oxygen nozzle (702); wherein the pure oxygen pipeline (701) is arranged above the ignition and heat-holding furnace (3); one end of the pure oxygen nozzle (702) is connected to the pure oxygen pipeline (701), and the other end extends into the burner fire channel in the furnace top of the ignition and heat-holding furnace (3).

4. The device according to claim 3, characterized in that: Along the running direction of the sintering trolley (1), the ignition and heat-insulating furnace (3) is respectively provided with a plurality of lifting electric heating plate devices (4) and a plurality of pure oxygen blowing devices (7).

5. The device according to claim 4, characterized in that: In the running direction of the sintering trolley (1), a plurality of sets of the lifting electric heating plate devices (4) and a plurality of sets of the pure oxygen blowing devices (7) are arranged alternately with each other.

6. The device according to claim 4 or 5, characterized in that: Along the running direction of the sintering trolley (1), the ignition and heat-insulating furnace (3) is divided into an ignition section (301) and a heat-insulating section (302); wherein, in the running direction of the sintering trolley (1), 1 to 8 sets of lifting electric heating plate devices (4) are provided on the ignition section (301); and 1 to 6 sets of lifting electric heating plate devices (4) are provided on the heat-insulating section (302).

7. The device according to claim 6, characterized in that: In the running direction of the sintering trolley (1), 2 to 4 sets of lifting electric heating plate devices (4) are provided on the ignition section (301); and 1 to 3 sets of lifting electric heating plate devices (4) are provided on the heat preservation section (302).

8. The device according to claim 6, characterized in that: In the running direction of the sintering trolley (1), the ignition section (301) of the ignition and holding furnace (3) is provided with 1 to 8 sets of pure oxygen blowing devices (7); and the holding section (302) is provided with 1 to 6 sets of pure oxygen blowing devices (7).

9. The device according to claim 7, characterized in that: In the running direction of the sintering trolley (1), the ignition section (301) of the ignition and holding furnace (3) is provided with 1 to 8 sets of pure oxygen blowing devices (7); and the holding section (302) is provided with 1 to 6 sets of pure oxygen blowing devices (7).

10. The device according to claim 8 or 9, characterized in that: In the running direction of the sintering trolley (1), 2 to 4 sets of pure oxygen blowing devices (7) are provided on the ignition section (301) of the ignition and holding furnace (3); and 1 to 3 sets of pure oxygen blowing devices (7) are provided on the holding section (302).

11. The device according to any one of claims 1-2, 4-5, 7-9, characterized in that: The resistance heating plate (403) is arranged parallel to and above the sintering trolley (1).

12. The device according to claim 3, characterized in that: The resistance heating plate (403) is arranged parallel to and above the sintering trolley (1).

13. The device according to claim 11, characterized in that: The resistance heating plate (403) comprises a plate body (40301) and resistance heating elements (40302); wherein the plate body (40301) is arranged parallel to the top of the sintering trolley (1) and is connected to the lower end of the power transmission bearing rod (402); and the resistance heating elements (40302) are evenly arranged on the plate body (40301).

14. The device according to claim 12, characterized in that: The resistance heating plate (403) comprises a plate body (40301) and resistance heating elements (40302); wherein the plate body (40301) is arranged parallel to the top of the sintering trolley (1) and is connected to the lower end of the power transmission bearing rod (402); and the resistance heating elements (40302) are evenly arranged on the plate body (40301).

15. The device according to claim 2, characterized in that: The sintered mixture distributor (5) and the biomass solid fuel distributor (6) are both nine-roller distributors.

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