Ultrahigh material layer production device and method based on sintering unequal-thickness bedding

Abstract

The invention discloses an ultrahigh material layer production device and method based on sintering unequal-thickness bedding. The ultrahigh material layer production device comprises a first sintering bedding bin, a second sintering bedding bin, a material distributing hopper, a sintering trolley and a material pressing assembly, and multiple sets of bar screens are arranged below the first sintering bedding bin at equal intervals; the distributing hopper is arranged below a blanking point of the first sintering grate-layer bin, the interior of the first sintering grate-layer bin is communicated with the second sintering grate-layer bin through a chute, the distributing hopper and the second sintering grate-layer bin are longitudinally distributed in the running direction of the sintering trolley, and the second sintering grate-layer bin is correspondingly arranged above the middle of the trolley. The material distributing hopper is arranged above the second sintering grate-layer bin in the longitudinal direction, two sets of discharging pipes are arranged at the bottom of the material distributing hopper, and the material pressing assembly is arranged in the sintering trolley before entering the ignition furnace and comprises a material scraping plate, a first material pressing plate and a second material pressing plate which are sequentially arranged. The method has the advantage that the ultra-thick material layer can be sintered in 330m < 2 >.

Description

Technical Field

[0001] The invention relates to the technical field of sintering, and in particular to a device and a method for producing an ultra-high material layer based on sintering a base with unequal thickness. Background Art

[0002] When a fluid flows along the solid wall of a space, it will be affected by it. When a fluid flows along the wall of a space filled with solid bulk powder, the effect of the wall on it is called the edge effect. At the edge of the sintering machine trolley, the material is loose and has a large porosity. In addition, the material shrinks during the sintering process and separates from the trolley railing to form a side seam, which causes the edge resistance to be small during the exhaust sintering process, the air flow short-circuits, and the wind speed increases significantly, forming an edge effect. Generally, the edge material is under-burned and light red in color. It has few agglomerates and many inclusions. After crushing and screening, most of it is transferred to the return ore, which is often called "red return ore". This results in a decrease in the edge yield rate. At the same time, the low melting point material in the red return ore is small, which also reduces the quality of the return ore. The edge effect causes uneven distribution of airflow on the material surface, unreasonable thermal system, poor air permeability, and lags behind the vertical sintering speed in the middle; different vertical sintering speeds aggravate the uneven distribution of airflow, forming a vicious circle, making the edge wind speed much higher than the middle part in the wind speed distribution of the material surface along the lateral direction of the trolley, resulting in reduced air volume utilization efficiency. This brings difficulties to the stable operation of sintering production. Especially with the development of large-scale sintering, ultra-thick material layers have become an important measure to improve sintering quality and reduce consumption. However, under the ultra-thick material layer, the edge effect will deteriorate the lateral uniformity of the sintering trolley, resulting in low resistance on both sides of the trolley, and the wind speed distribution is not conducive to the efficient use of air volume.

[0003] At present, the edge effect can be improved by spraying water in different areas, spraying chemicals, and edge pressing. However, for the sintering process, these are not economical solutions. The addition of water consumes more heat, spraying chemicals costs money, and the edge pressing effect is not very obvious. The bottom material is used to separate the mixture and the grate bars during sintering, preventing the powder and sintered ore from clogging and sticking to the grate, keeping the effective exhaust area of ​​the grate unchanged, and making the airflow evenly distributed. How to improve the edge effect of the trolley and achieve 330m through the optimization of the sintering bottom material? 2 Sintering ultra-thick material layers to improve the quality of sintered ore has become the direction of sintering exploration. Summary of the invention

[0004] The purpose of the present invention is to provide a super-high material layer production device and production method based on sintering unequal thickness bottom, realize the differentiated treatment of the air permeability in the transverse direction of the existing trolley, couple the unequal weight pressing materials, further deteriorate the air permeability on both sides of the trolley, solve the problems of uneven wind speed distribution on the material surface in the transverse direction of the trolley, the wind speed on both sides of the edge is higher than that in the middle, which is not conducive to the efficient use of air volume, and under-burning on both sides, too thick combustion zone in the middle, and serious segregation in quality under super-high material layer sintering, lay the foundation for sintering thick material layer operation, and finally solve the problems of 330m2 The material thickness on the sintering trolley is 1020mm.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: 14. The device for producing a super-high material layer based on sintering unequal thickness bottom paving, characterized in that: it includes a first sintering bottom paving material bin, a second sintering bottom paving material bin, a material distribution hopper, a sintering trolley and a material pressing assembly, wherein a plurality of groups of rod screens are equidistantly arranged below the first sintering bottom paving material bin, the material distribution hopper is arranged below the dropping point of the first sintering bottom paving material bin, the interior of the first sintering bottom paving material bin is connected with the second sintering bottom paving material bin through a chute, the material distribution hopper and the second sintering bottom paving material bin are longitudinally distributed along the running direction of the sintering trolley, the second sintering bottom paving material bin is correspondingly arranged above the middle part of the trolley, the material distribution hopper is arranged above the longitudinal direction of the second sintering bottom paving material bin, two groups of material discharge pipes are arranged at the bottom of the material distribution hopper, and the two groups of material discharge pipes are correspondingly arranged above both sides of the trolley, the material pressing assembly is arranged in the sintering trolley before entering the ignition furnace, and the material pressing assembly includes a scraper plate, a first pressing plate and a second pressing plate which are arranged in sequence.

[0006] Preferably, the center point of the discharge opening of the second sintering bottom material bin is aligned with the center position of the sintering trolley in the transverse direction, and the discharge openings of the two groups of discharge pipes are symmetrically arranged above both sides of the sintering trolley.

[0007] Preferably, the spacing between the multiple groups of bar screens is 12.5 mm.

[0008] Preferably, the feed pipe is configured as a U-shaped groove with an inner width of 400 mm, an outer width of 600 mm, and a height of 100 mm, the U-shaped groove is 45° to the horizontal, and insertion plates are provided in the distribution hopper and the U-shaped trough.

[0009] Preferably, the lower part of the blanking port of the second sintering bottom material bin is at 60° to the horizontal, the upper part of the blanking port of the second sintering bottom material bin is used to adjust the material speed of the middle bottom material through a fan-shaped valve, the center point of the fan-shaped valve is 600 mm away from the blanking port, and the circumferential angle between the inner side of the fan-shaped valve and the lower part of the blanking port of the second sintering bottom material bin around the center of the fan-shaped valve is 0°~30°.

[0010] Preferably, the blanking width of the second sintering bottom material bin is 3200mm, the blanking port of the second sintering bottom material bin is 120~130mm away from the sintering trolley, the longitudinal distance between the two groups of blanking ports of the distribution hopper and the blanking port of the second sintering bottom material bin is set to 50mm, and the two groups of blanking ports of the distribution hopper are 80~120mm away from the trolley.

[0011] Preferably, the scraper plate is a U-shaped scraper plate and is arranged in the middle of the sintering trolley. The scraper plate is arranged to be concave downward, and the scraper plate has a length of 3800 mm and a width of 500 mm.

[0012] Preferably, the first pressing plate is arranged in the middle of the sintering trolley, and the first pressing plate has a width of 3500mm, a height of 800mm, and a thickness of 10mm. The second pressing plate is provided in two groups and is arranged on both sides of the sintering trolley in the transverse direction. The second pressing plate is longitudinally spaced 50mm from the first pressing plate. The second pressing plate in each group has a width of 400mm, a height of 800mm, and a thickness of 10mm, and is 10mm away from the trolley railing. The first pressing plate and the second pressing plate are both made of Q345, and are both provided with additional counterweight hooks, and a single counterweight is set to 30kg.

[0013] A method for producing an ultra-high material layer based on sintering unequal thickness bottoming, characterized in that it comprises the following steps: Take the sintering mixture that meets the requirements and screen it to obtain the sintering base material with a particle size of 10~25mm; The sintered bed material is conveyed to the first sintered bed material bin via a belt, the 10~12.5mm particle size undersize enters the material distribution hopper, and the 12.5~25mm particle size oversize enters the second bed material bin via a chute; The oversize material and undersize material are laid on the bottom of the sintering trolley through the second bottom laying material bin and the material distribution hopper, and the particle size classification and unequal thickness bottom laying of the sintering trolley are completed by controlling the width and thickness of the bottom laying materials on both sides and in the middle; After the mixture is spread, the material is evenly distributed through the pressing component, and finally at 330m 2 Ultra-high material layer can be achieved on the sintering trolley.

[0014] Preferably, the requirements for the sintering mixture are: comprehensive burn loss is 4.5~5.5%, sintered ore silicon control range is 5.0~5.5%, binary basicity control range is 2.0~2.05, and ferrous range is 9.0±0.8.

[0015] In summary, the present invention has the following beneficial effects: the present invention uses a 12.5mm bar screen to perform secondary screening and grading of the bottom material with a sintering particle size of 10-25mm, and the undersize material, i.e., the bottom sintered ore with a particle size of 10-12.5mm, is respectively fed to both sides of the sintering trolley through a material dividing hopper, and the oversize material is directly fed to the middle of the sintering trolley through a chute. The particle size classification and unequal thickness bottom of the sintering trolley are achieved by controlling the width and thickness of the bottom materials on both sides and in the middle. The air permeability of the middle part of the trolley in the transverse direction is improved by the large particle size and thick bottom in the middle, and the air permeability of the edge of the trolley in the transverse direction is deteriorated by the small particle size and thin bottom on both sides. In the transverse direction of the trolley, an unequal weight material pressing device is provided, and finally the wind speed in the transverse direction of the trolley is uniformed, which can help to achieve an ultra-high material layer for sintering. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the device layout structure of the invention; Figure 2 It is a schematic diagram of the structure of the feeding pipe of the present invention; Figure 3 It is a schematic diagram of the structure of the second sintering bottom bunker of the present invention; Figure 4 It is a diagram showing the material distribution structure of the final super-high material layer of the sintering trolley of the present invention. DETAILED DESCRIPTION

[0017] The specific implementation manner of the present invention is further described below in conjunction with the accompanying drawings, and this embodiment does not constitute a limitation of the present invention.

[0018] like Figures 1 to 4 The device for producing an ultra-high material layer based on sintering unequal thickness bottom paving is shown, comprising a first sintering bottom paving material bin 1, a second sintering bottom paving material bin 2, a material dividing hopper 3, a sintering trolley 4 and a material pressing assembly, a plurality of groups of bar screens 10 are arranged at equal intervals below the first sintering bottom paving material bin 1, the material dividing hopper 3 is arranged below the material dropping point of the first sintering bottom paving material bin 1, the first sintering bottom paving material bin 1 is connected to the second sintering bottom paving material bin 2 through a chute, and the material dividing hopper 3 is connected to the second sintering bottom paving material bin 2 through a chute. The sintering bottom material bin 2 is longitudinally distributed along the running direction of the sintering trolley 4, the second sintering bottom material bin 2 is correspondingly arranged above the middle part of the trolley, the dividing hopper 3 is arranged above the second sintering bottom material bin 2 in the longitudinal direction, and two groups of discharge pipes 5 are arranged at the bottom of the dividing hopper 3, and the two groups of discharge pipes 5 are correspondingly arranged above the two sides of the trolley. The pressing assembly is arranged in the sintering trolley 4 before entering the ignition furnace, and the pressing assembly includes a scraper plate 6, a first pressing plate 7 and a second pressing plate 8 which are arranged in sequence.

[0019] The center point of the discharge opening of the second sintering bottom material bin 2 is aligned with the center position of the sintering trolley 4 in the transverse direction, and the discharge openings of the two groups of discharge pipes 5 are symmetrically arranged above both sides of the sintering trolley 4.

[0020] The spacing between multiple groups of bar screens is 12.5mm.

[0021] The feeding pipe 5 is set as a U-shaped groove with an inner width of 400mm, an outer width of 600mm and a height of 100mm. The U-shaped groove is 45° to the horizontal, and inserting plates are set in the material distribution hopper 3 and the U-shaped trough to control the flow rate of the bottom material on both sides.

[0022] The lower part of the blanking port of the second sintering bottom material bin 2 is 60° to the horizontal, and the upper part of the blanking port of the second sintering bottom material bin 2 adjusts the material speed of the middle bottom material through the fan valve 9. The center point of the fan valve 9 is 600mm away from the blanking port, and the circumferential angle between the inner side of the fan valve 9 and the lower part of the blanking port of the second sintering bottom material bin 2 around the center of the fan valve 9 is 0°~30°. When it is set to 0°, the amount of bottom material is 0.

[0023] The blanking width of the second sintering bottom material bin 2 is 3200mm, the blanking port of the second sintering bottom material bin 2 is 120~130mm away from the sintering trolley 4, the longitudinal distance between the blanking port of the two groups of discharge pipes 5 of the dividing hopper 3 and the blanking port of the second sintering bottom material bin 2 is set to 50mm, and the blanking port of the two groups of discharge pipes 5 of the dividing hopper 3 is 80~120mm away from the trolley.

[0024] The scraper plate 6 is a U-shaped scraper plate 6 and is arranged in the middle of the sintering trolley 4. The scraper plate 6 is arranged to be concave downward. The scraper plate 6 is 3800 mm long and 500 mm wide, so that the abundant mixed material in the middle moves to both sides, increasing the proportion of the mixed material on both sides in the vertical direction of the sintering trolley 4.

[0025] The first pressing plate 7 is arranged in the middle of the sintering trolley 4, with a width of 3500mm, a height of 800mm and a thickness of 10mm. The second pressing plate 8 is provided in two groups and is arranged on both sides of the sintering trolley 4 in the transverse direction. The second pressing plate 8 is longitudinally spaced 50mm from the first pressing plate 7. Each group of second pressing plates 8 has a width of 400mm, a height of 800mm and a thickness of 10mm, and is 10mm away from the trolley guardrail. The first pressing plate 7 and the second pressing plate 8 are both made of Q345, and are both provided with additional counterweight hooks, and a single counterweight is set to 30kg.

[0026] A method for producing an ultra-high material layer based on sintering unequal thickness bottom paving comprises the following steps: Take the sintering mixture that meets the requirements and screen it to obtain the sintering base material with a particle size of 10~25mm.

[0027] The sintered bottom material is conveyed to the first sintered bottom material bin 1 via a belt, the 10-12.5mm particle size undersize material enters the dividing hopper 3, and the 12.5-25mm particle size oversize material enters the second bottom material bin via a chute.

[0028] The oversize material and the undersize material are laid on the bottom of the sintering trolley 4 respectively through the second bottom laying material bin and the material dividing hopper 3, and the particle grading and unequal thickness bottom laying of the sintering trolley 4 are completed by controlling the width and thickness of the bottom laying materials on both sides and in the middle.

[0029] After the mixture is spread, the material is evenly distributed through the pressing component, and finally at 330m 2An ultra-high material layer is achieved on the sintering trolley 4.

[0030] The requirements for sintering mixture are: comprehensive burning loss is 4.5~5.5%, sintering ore silicon control range is 5.0~5.5%, binary basicity control range is 2.0~2.05, and ferrous range is 9.0±0.8.

[0031] The invention uses a 12.5mm bar screen to perform secondary screening and grading of the bottom material with a sintering particle size of 10-25mm. The undersize material, i.e., the bottom sintered ore with a particle size of 10-12.5mm, is respectively fed to both sides of the sintering trolley through a material dividing hopper, and the oversize material is directly fed to the middle of the sintering trolley through a chute. The particle size grading and unequal thickness bottom of the sintering trolley are achieved by controlling the width and thickness of the bottom material on both sides and in the middle. The large particle size and thick bottom in the middle improve the air permeability of the middle part of the trolley in the transverse direction, and the small particle size and thin bottom on both sides deteriorate the air permeability of the edge in the transverse direction of the trolley. In the transverse direction of the trolley, an unequal weight material pressing device is provided, and finally the wind speed in the transverse direction of the trolley is uniformed, which can help to achieve an ultra-high material layer for sintering.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A super-high material layer production device based on sintering unequal thickness bottom, characterized in that: The present invention comprises a first sintering bottom material bin, a second sintering bottom material bin, a material distribution hopper, a sintering trolley and a material pressing assembly. A plurality of groups of rod screens are arranged at equal intervals below the first sintering bottom material bin. The material distribution hopper is arranged below the dropping point of the first sintering bottom material bin. The interior of the first sintering bottom material bin is connected with the second sintering bottom material bin through a chute. The material distribution hopper and the second sintering bottom material bin are longitudinally distributed along the running direction of the sintering trolley. The second sintering bottom material bin is arranged correspondingly above the middle part of the trolley. The material distribution hopper is arranged above the longitudinal direction of the second sintering bottom material bin. Two groups of material discharge pipes are arranged at the bottom of the material distribution hopper. The two groups of material discharge pipes are arranged correspondingly above the two sides of the trolley. The material pressing assembly is arranged in the sintering trolley before entering the ignition furnace. The material pressing assembly comprises a scraper plate, a first material pressing plate and a second material pressing plate which are arranged in sequence.

2. The device for producing ultra-high material layer based on sintering unequal thickness bottom according to claim 1, characterized in that: The center point of the discharge opening of the second sintering bottom material bin is aligned with the center position of the sintering trolley in the transverse direction, and the discharge openings of the two groups of discharge pipes are symmetrically arranged above both sides of the sintering trolley.

3. The device for producing ultra-high material layer based on sintering unequal thickness bottom according to claim 1, characterized in that: The spacing between the multiple groups of bar screens is 12.5 mm.

4. The device for producing ultra-high material layer based on sintering unequal thickness bottom according to claim 1, characterized in that: The feed pipe is configured as a U-shaped groove with an inner width of 400 mm, an outer width of 600 mm, and a height of 100 mm. The U-shaped groove is 45° to the horizontal, and inserting plates are provided in the material distribution hopper and the U-shaped trough.

5. The device for producing ultra-high material layer based on sintering unequal thickness bottom according to claim 1, characterized in that: The lower part of the blanking port of the second sintering bottom material bin is at 60° to the horizontal, and the upper part of the blanking port of the second sintering bottom material bin is used to adjust the material speed of the middle bottom material through a fan-shaped valve. The center point of the fan-shaped valve is 600mm away from the blanking port, and the circumferential angle between the inner side of the fan-shaped valve and the lower part of the blanking port of the second sintering bottom material bin around the center of the fan-shaped valve is 0°~30°.

6. The device for producing ultra-high material layer based on sintering unequal thickness bottom according to claim 1, characterized in that: The blanking width of the second sintering bottom material bin is 3200mm, the blanking port of the second sintering bottom material bin is 120~130mm away from the sintering trolley, the longitudinal distance between the two groups of blanking ports of the distribution hopper and the blanking port of the second sintering bottom material bin is set to 50mm, and the two groups of blanking ports of the distribution hopper are 80~120mm away from the trolley.

7. The device for producing ultra-high material layer based on sintering unequal thickness bottom according to claim 1, characterized in that: The scraper plate is a U-shaped scraper plate and is arranged in the middle of the sintering trolley. The scraper plate is arranged to be concave downward. The length of the scraper plate is 3800 mm and the width is 500 mm.

8. The device for producing ultra-high material layer based on sintering unequal thickness bottom according to claim 1, characterized in that: The first pressing plate is arranged in the middle of the sintering trolley, with a width of 3500mm, a height of 800mm and a thickness of 10mm. The second pressing plate is provided in two groups and is arranged on both sides of the sintering trolley in the transverse direction. The second pressing plate is longitudinally spaced 50mm from the first pressing plate. The width of each group of the second pressing plates is 400mm, the height is 800mm, the thickness is 10mm, and the distance from the trolley guardrail is 10mm. The first pressing plate and the second pressing plate are both made of Q345, and are both provided with additional counterweight hooks, and a single counterweight is set to 30kg.

9. A method for producing an ultra-high material layer based on sintering unequal thickness bottom, characterized in that: The steps include: Take the sintering mixture that meets the requirements and screen it to obtain the sintering base material with a particle size of 10~25mm; The sintered bed material is conveyed to the first sintered bed material bin via a belt, the 10~12.5mm size undersize material enters the material distribution hopper, and the 12.5~25mm size oversize material enters the second bed material bin via a chute; The oversize material and undersize material are laid on the bottom of the sintering trolley through the second bottom laying material bin and the material distribution hopper, and the particle size classification and unequal thickness bottom laying of the sintering trolley are completed by controlling the width and thickness of the bottom laying materials on both sides and in the middle; After the mixture is spread, the material is evenly distributed through the pressing component, and finally at 330m 2 Ultra-high material layer can be achieved on the sintering trolley.

10. A method for producing ultra-high material layers based on sintering unequal thickness bottom paving, characterized in that: The requirements for the sintering mixture are: comprehensive burning loss is 4.5~5.5%, sintered ore silicon control range is 5.0~5.5%, binary basicity control range is 2.0~2.05, and ferrous range is 9.0±0.8.

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