A method and system for sintering fabrics with multiple vertical seams

Abstract

The invention relates to a multi-vertical seam sintering material distribution method and system. A sintering material section forming device composed of a plurality of vertical blades is used to form a plurality of vertical vertical seams which are continuous in the longitudinal direction and uniformly distributed in the transverse direction during the sintering mixed material spreading process. The vertical vertical seams are air-permeable seams filled with large-particle sintering materials. During sintering by exhaust, the air in the upper layer can pass through the entire sintering material layer downward from the air-permeable seams with a uniform air volume, and while passing through the air-permeable seams, the air can penetrate into the surrounding sintering material layer through the gaps between the large-particle sintering materials; thereby increasing the heating uniformity in the height direction of the sintering material layer and the overall heating uniformity, thereby ensuring that the sintering process is carried out uniformly and quickly, which is conducive to achieving the goals of high yield, high quality and low consumption in sintering production.

Description

Technical Field

[0001] The invention relates to the technical field of iron ore sintering, and in particular to a multi-vertical seam sintering material distribution method and system. Background Art

[0002] Iron ore sintering is one of the main methods of iron ore agglomeration. The process is to mix the iron concentrate obtained by beneficiation of lean iron ore, the powder ore produced in the process of crushing and screening of rich iron ore, the iron-containing powder recovered in production (blast furnace and converter dust, continuous casting and rolling steel scale, etc.), flux (limestone, quicklime, slaked lime, dolomite and magnesite, etc.) and fuel (coke powder and anthracite) in the required proportion, add water and mix to form a granular sintering mixture, spread it on the sintering trolley, and sinter it into agglomerates after ignition and exhaust.

[0003] At present, the most widely used equipment for producing sintered ore is the belt-type exhaust sintering machine. The process includes main procedures such as material distribution, ignition, and sintering. Material distribution refers to the operation of spreading the base material and the mixed material on the sintering machine trolley. Most of them adopt the base material distribution process, that is, before spreading the sintering mixture, a layer of small pieces of sintered ore with a particle size of 10-25mm and a thickness of 20-25mm is first spread as the base material. The purpose is to protect the grate, reduce the dust removal load, extend the life of the fan rotor, and reduce or eliminate grate sticking. After laying the base material, the material distribution will follow. The exhaust sintering process of the belt sintering machine is carried out from top to bottom. The temperature changes along the height of the material layer can generally be divided into 5 layers. The reaction changes in each layer are as follows: Figure 1 As shown in the figure, after the ignition begins, the sintering layer, combustion layer, preheating layer, drying layer and over-humidification layer appear in sequence. Then the last four layers disappear one after another, and finally only the sintering layer remains.

[0004] Segregation distribution during the sintering process can improve the permeability of the material layer and make the solid fuel more reasonably distributed along the height direction of the sintering material layer, thereby ensuring that the sintering process can be carried out evenly and quickly, making the entire sintering process stable, which is of great significance for the high yield, high quality and low consumption of sintering production. During the sintering production process, as the sintering material layer thickens, the air flow resistance through the material layer increases, and the sintering speed slows down, which not only increases the power consumption of the fan in the sintering bellows, but also leads to a decrease in sintering productivity; therefore, the permeability of the sintering mixture must be improved when sintering thick material layers.

[0005] In order to enhance the air permeability of the sintering material layer, increase the temperature of the mixed material layer, and improve the sintering yield, a loosening device is currently commonly used. There are many structural forms of loosening devices, among which the most commonly used is a hollow rod-shaped loosening device with a heating hole and a blind end, such as the "loosening device for sintering machine distribution" disclosed in the Chinese utility model patent with authorization announcement number CN203068967U, and the "a drying and preheating loosening device" disclosed in the Chinese utility model patent with authorization announcement number CN 201662327 U; their purpose is to improve the looseness of the mixed material layer of the sintering machine trolley and improve the uniformity of the material in the vertical direction of the material layer. However, this type of loosening device has the following disadvantages when loosening the material: 1. When the loosening rod is pulled out, transverse holes with the same aperture as the loosening rod remain in the mixed material layer, affecting the mineralization in the middle of the material layer; 2. Because the air path takes a shortcut and the finished sintered ore has good air permeability, under the action of negative pressure, the air volume flows horizontally through the holes of the loosening rod. Although it has a certain preheating effect, its essence is the loss of negative pressure, which reduces the pressure difference of the vertical material layer and thus slows down the combustion rate. Summary of the invention

[0006] The present invention provides a multi-vertical seam sintering material distribution method and system, which adopts an oscillating material distribution method and cooperates with a sintering material section forming device composed of multiple vertical blades to form multiple vertical vertical seams that are continuous in the longitudinal direction and uniformly distributed in the transverse direction during the sintering mixture distribution process. The vertical vertical seams are air-permeable seams filled with large-particle sintering materials. During exhaust sintering, the air in the upper layer can pass through the entire sintering material layer from the air-permeable seams downward with a uniform air volume, and while passing through the air-permeable seams, it penetrates into the surrounding sintering material layer through the gaps between the large-particle sintering materials; thereby increasing the sintering material layer in the height direction and the overall heating uniformity, thereby ensuring that the sintering process is carried out uniformly and quickly, which is conducive to achieving the goals of high yield, high quality and low consumption in sintering production.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A multi-vertical seam sintering material distribution method, a sintering material cross-section forming device is arranged at the head of a sintering machine, and the sintering material cross-section forming device comprises a plurality of vertical blades arranged transversely along a sintering trolley; the sintering mixed material adopts an oscillating distribution method, so that large-particle sintering material is attached to both sides of the vertical blades after distribution, that is, a segregation structure is formed between two adjacent vertical blades; after the sintering trolley moves, when the vertical blades are extracted from the laid sintering material layer, the large-particle sintering material fills the gap formed by the vertical blades, so that a plurality of vertical vertical seams which are continuous in the longitudinal direction and uniformly distributed in the transverse direction are formed in the sintering material layer, and the vertical vertical seams are air-permeable seams filled with large-particle sintering material; during exhaust sintering, the air in the upper layer can pass through the entire sintering material layer from the air-permeable seams downwards with a uniform air volume, and while passing through the air-permeable seams, it penetrates into the surrounding sintering material layer through the gaps between the large-particle sintering material.

[0009] The vertical blades are provided with one to multiple layers in the vertical direction, and correspondingly, the ventilation slits are continuous ventilation slits or intermittent ventilation slits.

[0010] When the vertical blades are arranged in two or more layers, the vertical blades in each layer are aligned or staggered.

[0011] A guide grid is provided above the vertical blades; the guide grids are arranged one by one with the vertical blades along the lateral direction of the sintering trolley, and each guide grid is arranged directly above the corresponding vertical blade and on the falling path of the sintering mixture.

[0012] The guide fence is in the shape of an elongated strip, and its cross section is in the shape of a rectangle, an ellipse, a wedge or a diamond.

[0013] The sintering material section forming device is connected to the microwave heating device and is used to heat the vertical blades, thereby indirectly heating the sintering mixture and preventing the sintering mixture from adhering to the vertical blades.

[0014] An atomizing device is also provided above the sintering material section forming device to assist the sintering mixed material to move into balls through spray humidification.

[0015] The multi-vertical seam sintering material distribution system used in the method comprises an oscillating material distribution device and a sintering material cross-section forming device; the sintering material cross-section forming device is composed of a support beam and a plurality of vertical blades; the support beam is fixedly mounted on a basic bracket at the head of the sintering machine, the vertical blades are arranged in a direction parallel to the moving direction of the sintering trolley, and the plurality of vertical blades are evenly arranged in the transverse direction of the sintering trolley; the oscillating material distribution device is arranged above the sintering cross-section forming device, the upper end of the oscillating material distribution device is connected to the discharge port of the distribution hopper, and the lower end of the oscillating material distribution device is located above the vertical blades; the oscillating material distribution device has a horizontal oscillating motion in the transverse direction of the sintering trolley.

[0016] The plurality of guide fences above the vertical blades are connected via a frame or an intermediate connecting plate.

[0017] A multi-vertical seam sintering material distribution system also includes a microwave heating device and an atomizing device; the microwave heating device and the atomizing device are respectively fixed on a basic bracket of a sintering machine head through corresponding mounting brackets.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1) Compared with the loosener, the gap formed by the sintering material cross-section forming device of the present invention is filled with large-particle sintering material, and no voids are formed in the sintering material layer, thereby avoiding the loss of negative pressure caused by the air path taking a shortcut and flowing along the voids caused by the loosener; it can reduce the pressure difference of the vertical material layer and slow down the combustion speed.

[0020] 2) The present invention cooperates with a plurality of vertical blades provided in the sintering material section forming device through an oscillating material distribution device to perform oscillating and oscillating acceleration on the movement trajectory of the sintering mixed material during distribution, so that the large particles of sintering material move to both sides and gather after oscillation acceleration, and thus stay on both sides of the vertical blades, and the movement speed of the remaining small particles of sintering material gradually slows down, and finally stays in the middle area between two adjacent vertical blades;

[0021] 3) When the sintering trolley moves, the laid sintering material layer separates from the vertical blade, and the narrow gap formed by the vertical blade is quickly filled with large-particle sintering materials on both sides, forming a low-density aggregation area of ​​large-particle sintering materials at the original position of the vertical blade, that is, multiple air-permeable gaps filled with large-particle sintering materials; because the large-particle sintering materials have a self-supporting effect, the vertical seams will not form voids, and a loose structure with multiple air-permeable channels is formed;

[0022] 4) During sintering with ventilation, the air in the upper layer can pass through the entire sintering material layer from the air permeable slit downward with a uniform air volume, and while passing through the air permeable slit, it can penetrate into the surrounding sintering material layer through the gaps between the large particles of sintering material;

[0023] 5) By adding a guide grid, the sintering mixture can be prevented from directly impacting the vertical blade, thereby extending the service life of the sintering material section forming device; at the same time, the distribution effect of large-particle sintering material on both sides of the vertical blade can be further enhanced;

[0024] 6) By adding a microwave heating device, the sintering mixture can be indirectly heated through the vertical blades to increase the temperature of the sintering material layer, while preventing the sintering mixture from adhering to the vertical blades;

[0025] 7) By adding an atomizing device, the sintering mixture can be moistened and the sintering mixture can be promoted to move into balls during the distribution process, thereby enhancing the standing seam distribution effect; at the same time, the atomizing device can also enhance the heating effect of the microwave heating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the working principle of a multi-standing seam sintering cloth method described in the present invention.

[0027] Figure 2 yes Figure 1 AA view in.

[0028] Figure 3 yes Figure 2 A partial enlarged view of .

[0029] Figure 4 Schematic diagram of the oscillating cloth of the present invention.

[0030] Figure 5It is a side view of the sintering material section forming device of the present invention.

[0031] Figure 6 It is a schematic diagram of the distribution of the vertical blades and guide grids along the lateral direction of the sintering trolley according to the present invention.

[0032] Figure 7 It is a schematic diagram of the motion trajectory of the oscillating distribution of large-particle sintering material according to the present invention.

[0033] Figure 8 It is a schematic diagram of the motion trajectory of the oscillating distribution of the small-particle sintering material according to the present invention.

[0034] In the figure: 1. Material distribution hopper 2. Oscillating material distribution device 3. Guide grid 4. Sintering material section forming device 41. Support frame 42. Vertical blade 5. Sintering trolley 6. Sintering material layer 61. Vertical standing seam 7. Sintering bellows 8. Large particle sintering material DETAILED DESCRIPTION

[0035] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0036] like Figure 1 As shown, the multi-vertical seam sintering material distribution method of the present invention comprises a sintering material section forming device provided at the head of the sintering machine, wherein the sintering material section forming device 4 comprises a plurality of vertical blades 42 arranged transversely along the sintering trolley 5; the sintering mixed material adopts an oscillating distribution method (such as Figure 4 As shown in the figure, the large-particle sintering material 8 is laid on both sides of the vertical blades 42, that is, a segregation structure is formed between two adjacent vertical blades 42; when the vertical blades 42 are pulled out from the laid sintering material layer 6 after the sintering trolley 5 moves, the large-particle sintering material 8 fills the gap formed by the vertical blades 42, so that a plurality of vertical vertical seams 61 (as shown in the figure) that are continuous in the longitudinal direction and evenly distributed in the transverse direction are formed in the sintering material layer 6. Figure 2 As shown), the vertical seam 61 is a ventilated seam filled with large-grain sintered material 8 (as shown in FIG. Figure 3 During sintering with ventilation, the air in the upper layer can pass through the entire sintering material layer 6 downward from the air permeable slit with a uniform air volume, and while passing through the air permeable slit, the air penetrates into the surrounding sintering material layer 6 through the gaps between the large-particle sintering materials 8.

[0037] like Figure 5 As shown, the vertical blades 42 are provided with one to multiple layers in the vertical direction, and correspondingly, the ventilation slits are continuous ventilation slits or intermittent ventilation slits.

[0038] When the vertical blades 42 are arranged in two or more layers, the vertical blades 42 of each layer are aligned or staggered.

[0039] A guide fence 3 (such as Figure 6 The guide fence 3 is arranged one by one along the sintering trolley 5 in a horizontal direction and in correspondence with the vertical blade 42, and each guide fence 3 is arranged directly above the corresponding vertical blade 42 and is located on the falling path of the sintering mixture.

[0040] The guide fence 3 is in the shape of an elongated strip, and its cross section is in the shape of a rectangle, an ellipse, a wedge or a diamond.

[0041] The sintering material section forming device 4 is connected to the microwave heating device and is used to heat the vertical blade 42 , thereby indirectly heating the sintering mixture and preventing the sintering mixture from adhering to the vertical blade 42 .

[0042] An atomizing device is also provided above the sintering material section forming device 4 to assist the sintering mixture to move into balls through spray humidification.

[0043] The multi-vertical seam sintering material distribution system for implementing the method comprises an oscillating material distribution device 2 and a sintering material cross-section forming device 4; the sintering material cross-section forming device 4 is composed of a support beam 41 and a plurality of vertical blades 42; the support beam 41 is fixedly mounted on a basic support of a sintering machine head, the vertical blades 42 are arranged in a direction parallel to the moving direction of a sintering trolley 5, and the plurality of vertical blades 42 are evenly arranged in the transverse direction of the sintering trolley 5; the oscillating material distribution device 2 is arranged above the sintering cross-section forming device 4, the upper end of the oscillating material distribution device 2 is connected to the discharge port of the distribution hopper 1, and the lower end of the oscillating material distribution device 2 is located above the vertical blades 42; the oscillating material distribution device 2 has a horizontal oscillating motion in the transverse direction of the sintering trolley 5.

[0044] The plurality of guide fences 3 above the vertical blades 42 are connected via frames or intermediate connecting plates.

[0045] A multi-vertical seam sintering material distribution system also includes a microwave heating device and an atomizing device; the microwave heating device and the atomizing device are respectively fixed on a basic bracket of a sintering machine head through corresponding mounting brackets.

[0046] The present invention cooperates the oscillating material distribution device 2 with a plurality of vertical blades 42 provided in the sintering material section forming device 4, and the amplitude of the oscillating material distribution device 2 matches the setting interval of the vertical blades 42; during the distribution, the sintering mixed material is subjected to a motion trajectory swinging oscillation acceleration, so that the large particles of sintering material 8 move to both sides and gather after the oscillation acceleration, and thus stay on both sides of the vertical blades 42 (such as Figure 7 The remaining small particles of sintered material gradually slow down and eventually stay in the middle area between two adjacent vertical blades 42 (as shown in FIG. Figure 8 shown).

[0047] When the sintering trolley 5 moves, the laid sintering material layer 6 is separated from the vertical blade 42, and the slit formed by the vertical blade 42 is quickly filled with large-particle sintering materials 8 on both sides, forming a low-density aggregation area of ​​large-particle sintering materials at the original position of the vertical blade 42, that is, a plurality of air-permeable seams filled with large-particle sintering materials 8; because the large-particle sintering materials 8 have a self-supporting effect, the vertical seams will not form cavities, and at the same time, a loose structure with multiple air-permeable channels (such as Figure 2 , Figure 3 shown).

[0048] During sintering with ventilation, multiple sintering bellows 7 exhaust air simultaneously through the fan, and the air above the sintering material layer 6 can pass through the entire sintering material layer 6 from the air permeable slit downward with a uniform air volume, and while passing through the air permeable slit, penetrate into the surrounding sintering material layer 6 through the gaps between the large particles of sintering material 8. This increases the heating uniformity in the height direction of the sintering material layer 6 and the overall heating uniformity, thereby ensuring that the sintering process is carried out uniformly and quickly, which is conducive to achieving the goals of high yield, high quality and low consumption in sintering production.

[0049] By adding the guide fence 3, the sintering mixture can be prevented from directly impacting the vertical blade 42, thereby extending the service life of the sintering material section forming device 4; at the same time, the distribution effect of the large-particle sintering material 8 on both sides of the vertical blade 42 can be further enhanced.

[0050] By adding a microwave heating device, the sintering mixture can be indirectly heated through the vertical blade 42 to increase the temperature of the sintering material layer 6, while preventing the sintering mixture from adhering to the vertical blade 42;

[0051] By adding an atomizing device, the sintering mixture can be moistened and promoted to move into balls during the spreading process, thereby enhancing the standing seam spreading effect; at the same time, the atomizing device can also enhance the heating effect of the microwave heating device.

[0052] The microwave heating device and atomizing device described in the present invention are conventional commercially available products, which are prior art, and their specific structures and working principles are not described in detail here.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for sintering fabrics with multiple vertical seams, characterized in that: A sintering material cross-section forming device is arranged at the head of the sintering machine, and the sintering material cross-section forming device comprises a plurality of vertical blades arranged transversely along the sintering trolley, and the setting direction of the vertical blades is parallel to the moving direction of the sintering trolley; a guide grid is arranged above the vertical blades; the guide grids are arranged one by one with the vertical blades along the transverse direction of the sintering trolley, and each guide grid is arranged directly above the corresponding vertical blade and is located on the falling path of the sintering mixture; the sintering mixture adopts an oscillating distribution method, and the amplitude of the oscillating distribution device matches the setting interval of the vertical blades, so that the large-particle sintering material is attached to the two sides of the vertical blades after distribution, that is, a segregation structure is formed between two adjacent vertical blades; after the sintering trolley moves, when the vertical blades are withdrawn from the laid sintering material layer , large-particle sintering material fills the gaps formed by the vertical blades, so that a plurality of vertical vertical seams that are continuous in the longitudinal direction and evenly distributed in the transverse direction are formed in the sintering material layer, and the vertical vertical seams are air-permeable seams filled with large-particle sintering material; during exhaust sintering, the air in the upper layer can pass through the entire sintering material layer from the air-permeable seams downward with a uniform air volume, and while passing through the air-permeable seams, it penetrates into the surrounding sintering material layer through the gaps between the large-particle sintering material; the sintering material cross-section forming device is connected to a microwave heating device, which is used to heat the vertical blades, and prevent the sintering mixture from adhering to the vertical blades while indirectly heating the sintering mixture; an atomizing device is also provided above the sintering material cross-section forming device, which assists the sintering mixture to move into balls through spray humidification.

2. A method for sintering materials with multiple vertical seams according to claim 1, characterized in that: The vertical blades are provided with one to multiple layers in the vertical direction, and correspondingly, the ventilation slits are continuous ventilation slits or intermittent ventilation slits.

3. A method for sintering materials with multiple vertical seams according to claim 2, characterized in that: When the vertical blades are arranged in two or more layers, the vertical blades in each layer are aligned or staggered.

4. The method for sintering materials with multiple vertical seams according to claim 1, characterized in that: The guide fence is in the shape of an elongated strip, and its cross section is in the shape of a rectangle, an ellipse, a wedge or a diamond.

5. A multi-stitch sintering material distribution system for implementing the method described in any one of claims 1 to 4, characterized in that: It includes an oscillating distribution device and a sintering material cross-section forming device, and also includes a microwave heating device and an atomizing device; the microwave heating device and the atomizing device are respectively fixed on the basic bracket of the sintering machine head through corresponding mounting brackets; the sintering material cross-section forming device consists of a support beam and a plurality of vertical blades; the support beam is fixed on the basic bracket of the sintering machine head, the setting direction of the vertical blades is parallel to the moving direction of the sintering trolley, and the plurality of vertical blades are evenly arranged along the horizontal direction of the sintering trolley; the oscillating distribution device is arranged above the sintering cross-section forming device, the upper end of the oscillating distribution device is connected to the discharge port of the distribution hopper, and the lower end of the oscillating distribution device is located above the vertical blades; the oscillating distribution device has a horizontal oscillating motion along the horizontal direction of the sintering trolley, and the amplitude of the oscillating distribution device matches the setting interval of the vertical blades.

6. The multi-standing seam sintering material distribution system according to claim 5, characterized in that: The plurality of guide fences above the vertical blades are connected via a frame or an intermediate connecting plate.

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