A sintering cloth device

Abstract

The present application belongs to the technical field of iron ore sintering in the metallurgical industry, and relates to a sintering distributing device, which comprises a multi-roller distributor, a baffle and a support frame, the multi-roller distributor and the baffle are located above a sintering trolley, a first side of the baffle is hinged to the support frame, a second side opposite to the first side faces a lower edge of the multi-roller distributor, the baffle is provided with a driving device, and the driving device can drive the baffle to rotate around the hinge with the support frame. The present application can solve the problem that the existing distributing equipment does not consider the low fuel specific gravity and uneven particle size, which causes uneven distribution of solid fuel and is not conducive to sintering production.

Description

Technical Field

[0001] The invention belongs to the technical field of iron ore powder sintering in the metallurgical industry, and particularly relates to a sintering distribution device. Background Art

[0002] The solid fuels used in sintering production are primarily anthracite and crushed coke. After crushing, the solid fuel particle size composition is over 70% of the total. Solid fuels used in sintering are the lightest and least abundant in the sintering raw material pile. During pelletization, solid fuels rarely adhere to the pellets, with coke dust being particularly difficult to adhere to. Only a small amount of solid fuel particles less than 0.5mm are encapsulated within the pellets. Towards the end of pelletization, the pellets become more dense, and capillary water within them is expelled. This increases the surface water content of the pellets, allowing smaller solid fuel particles to adhere to the pellet surface. The majority of the solid fuel remains free within the mixture, especially coarser solid fuel particles.

[0003] With advances in smelting technology, pellet sintering, low-temperature sintering, and thick-bed sintering have become standard techniques in sintering production. Sintering experiments have shown that smaller particles require lower sintering temperatures than larger particles, and vice versa. Sintering experiments have also confirmed that during draft sintering, the heat generated by the combustion of solid fuel in the upper portion of the sintering trolley is drawn into the lower portion by the exhaust fan. This movement of hot air continuously heats the sintering material in the lower portion, raising its temperature. This is the principle of automatic heat storage in the sintering process. To fully utilize this automatic heat storage effect, sintering material distribution equipment typically utilizes a combination of round rollers and a nine-roller distributor. The nine-roller distributor achieves segregated distribution, distributing the coarse fraction of the sintering material to the lower portion of the sintering trolley and, as the material layer increases, distributing the finer fraction to the upper portion of the sintering trolley. To improve the quality of sintered ore under the effect of automatic heat storage, it is hoped that the distribution of solid fuel can be gradually increased from bottom to top along the vertical direction of the sintering trolley. However, since most of the solid fuel in the mixture is free and has a light specific gravity, these solid fuels are discharged from the distribution rollers together with the mixture. Due to the segregation effect of the nine-roller distributor, they often remain in the uppermost layer of the sintering material flow of the nine-roller distributor. During distribution, most of the solid fuel is carried by the sintering material to the middle and lower parts of the sintering trolley, resulting in a gradual decrease in the proportion of solid fuel from bottom to top along the vertical direction of the sintering trolley. This leads to insufficient fuel in the upper part of the material layer and excessive fuel in the lower part of the material layer, which directly affects the quality of the sintered ore and is not conducive to reducing the solid fuel.

[0004] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Summary of the Invention

[0005] The object of the present invention is to provide a sintering material distribution device, which can solve the problem that existing material distribution equipment does not take into account the low specific gravity of the fuel and the uneven particle size of the solid fuel distribution, which is not conducive to sintering production.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0007] A sintering material distribution device comprises a multi-roller distributor, a baffle and a support frame, wherein the multi-roller distributor and the baffle are located above a sintering trolley, a first side of the baffle is hinged to the support frame, and a second side opposite to the first side faces the lower edge of the multi-roller distributor, and the baffle is provided with a driving device, which can drive the baffle to rotate around the hinge with the support frame.

[0008] As an embodiment of the present invention, the angle between the baffle and the material flow direction of the multi-roller distributor is 80-100°, preferably 85-95°, and more preferably 90°.

[0009] As an embodiment of the present invention, the distance between the baffle and the lower edge of the multi-roller distributor is 50 to 150 mm.

[0010] As an embodiment of the present invention, the contact depth between the baffle and the material flow on the multi-roller distributor is 30 to 100 mm.

[0011] As an embodiment of the present invention, the driving device is a cylinder, the output end of the cylinder is connected to the upper end or the middle part of the baffle, and the output end of the cylinder is actuated to drive the baffle to rotate.

[0012] As an embodiment of the present invention, the output end of the oil cylinder is connected to the upper part or the middle part of the baffle via a first hinge.

[0013] As an embodiment of the present invention, the first side of the baffle is hinged to the support frame via a second hinge, the first end of the second hinge is located at the center of the baffle, and the second end is fixed to the support frame.

[0014] As another embodiment of the present invention, the baffle is a symmetrical structure with a central axis, the first side of the baffle is hinged to the support frame through a second hinge and a third hinge, the first ends of the second hinge and the third hinge are symmetrically arranged on both sides of the central axis of the baffle, and the second ends are fixed to the support frame.

[0015] As an embodiment of the present invention, the support frame is integrally provided with the multi-roller distributor or is provided separately. Preferably, the support frame is fixed on a steel structure.

[0016] As an embodiment of the present invention, the multi-roller distributor is a nine-roller distributor.

[0017] Compared with the closest existing technology, the technical solution provided by the present invention has the following beneficial effects:

[0018] The sintering distribution device of the present invention is provided with a baffle, which can adjust the distance between the baffle and the lower edge of the multi-roller distributor according to changes in process parameters and production conditions under the action of a driving device, thereby effectively suppressing the segregation of solid fuel during the distribution process, preventing a large amount of solid fuel from being brought to the middle and lower parts of the sintering trolley, and making the solid fuel with low specific gravity or uneven particle size more evenly distributed in the vertical direction of the sintering trolley, thereby ensuring sufficient heat in the upper part of the sintering trolley during the sintering process, improving the quality of the sintered ore, and reducing the consumption of solid fuel.

[0019] The invention has the advantages of simple structure, ingenious design, low manufacturing cost, simple maintenance, safety, reliability and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] in:

[0022] Figure 1 This is a schematic structural diagram of a sintering material distribution device according to one embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the arrangement of the baffle and the support frame in a sintering material distribution device according to another embodiment of the present invention;

[0024] Figure 3 It is a partial structural schematic diagram of a sintering material distribution device according to another embodiment of the present invention.

[0025] Markings in the figure: 1. Baffle; 2. Cylinder; 3. First hinge; 4. Second hinge; 5. Third hinge; 6. Sintering material; 7. Solid fuel; 8. Multi-roller distributor; 9. Sintering trolley; 10. Support frame. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0027] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0028] like Figure 1 FIG2 shows a sintering material distribution device according to a specific embodiment of the present invention. The sintering material distribution device comprises a multi-roller distributor 8, a baffle 1, and a support frame 10. The multi-roller distributor 8 and the baffle 1 are located above the sintering trolley 9. A first side of the baffle 1 is hinged to the support frame 10, and a second side opposite to the first side faces the bottom edge of the multi-roller distributor 8. The baffle 1 is provided with a drive device that can drive the baffle 1 to rotate about the hinge with the support frame 10.

[0029] In a specific implementation case of the present invention, the multi-roller distributor 8 is a nine-roller distributor, but this does not constitute an improper limitation to the invention.

[0030] As an embodiment, the driving device is a cylinder 2, and the output end of the cylinder 2 is connected to the upper end or the middle part of the baffle 1. Specifically, the output end of the cylinder 2 is connected to the baffle 1 via a first hinge 3, and the telescopic action of the output end of the cylinder 2 drives the baffle 1 to rotate.

[0031] The oil cylinder 2 generally comprises a cylinder barrel and a cylinder head, a piston and a piston rod and a sealing device, wherein the piston rod is the output end mentioned above. The movement of the piston rod of the oil cylinder 2 can be assisted by manual or electric control.

[0032] Specifically, the output end of the oil cylinder 2 is connected to the upper or middle part of the baffle 1 via the first hinge 3, for example, Figure 1 As an embodiment of the present invention, the output end of the oil cylinder 2 is connected to the center of the upper edge of the rectangular baffle 1 via the first hinge 3, or, as Figure 3 As another embodiment of the present invention, the first hinge 3 is connected to the center of the rectangular baffle 1, so that the baffle 1 can rotate smoothly under the action of the output end of the cylinder 2 and move according to a preset arc trajectory, which is conducive to the uniform distribution of solid fuel.

[0033] During the sintering distribution process, since most of the solid fuel 7 is in a free state and has a light specific gravity, it emerges from the distribution rollers along with the sinter material 6. Due to the segregation effect of the nine-roller distributor, this solid fuel 7 often accumulates in the uppermost portion of the nine-roller distributor. During distribution, the majority of the solid fuel 7 is carried by the coarse-grained sinter material 6 to the lower and middle portions of the sintering trolley 9. Therefore, with conventional distribution devices, the proportion of solid fuel 7 gradually increases from top to bottom in the sinter material 6 flow of the nine-roller distributor. This results in insufficient fuel in the upper portion of the sintering trolley 9 and excess fuel in the lower portion. This directly affects the quality of the sintered ore and is detrimental to reducing solid fuel 7 consumption.

[0034] In the above-mentioned sintering material distribution device of the present invention, the output end of the oil cylinder 2 is extended and retracted, driving the baffle 1 to rotate and forming an arc-shaped motion trajectory. The gap between the baffle 1 and the nine-roller distributor can be changed according to process requirements, thereby changing the contact depth between the baffle 1 and the material flow on the nine-roller distributor, blocking the solid fuel 7 on the upper part of the nine-roller distributor, allowing the sintering material 6 to enter the bottom of the sintering trolley 9 first, and then the solid fuel 7 and the sintering material 6 are distributed on the sintering trolley 9 together, so that the solid fuel 7 is evenly distributed in the vertical direction of the sintering trolley 9.

[0035] Specifically, Figure 1 Taking the sintering distribution device shown as an example, when the particle size of the solid fuel 7 is too coarse, the output end of the oil cylinder 2 can be extended downward to drive the baffle 1 to move obliquely downward about the hinge connection with the second hinge 4 and / or the third hinge 5 toward the lower edge of the multi-roller distributor 8, thereby increasing the contact depth between the baffle 1 and the material flow and allowing the solid fuel 7 to remain in the upper layer. When the particle size of the solid fuel 7 is too fine, the output end of the oil cylinder 2 can be retracted upward toward the cylinder barrel to drive the baffle 1 to move obliquely upward away from the lower edge of the multi-roller distributor 8, thereby reducing the contact depth between the baffle 1 and the material flow.

[0036] As an embodiment of the present invention, the angle between the baffle 1 and the material flow direction on the multi-roller distributor 8 is close to 90°. As a specific embodiment, the angle between the baffle 1 and the material flow direction on the multi-roller distributor 8 can be adjusted to 80-100°. For example, 80°, 82°, 84°, 85°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94°, 95°, 97°, 98°, 99° or 100° can be selected. This is just an exemplary description.

[0037] Furthermore, it may be preferably 85° to 95°, more preferably 90°.

[0038] When the included angle between the baffle 1 and the material flow direction on the multi-roller distributor 8 is less than 80° or greater than 100°, the segregation effect of the light solid fuel is poorly improved.

[0039] As an embodiment of the present invention, the distance between the baffle 1 and the lower edge of the multi-roller distributor 8 is 50 to 150 mm, for example, it can be 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, 85 mm, 95 mm, 100 mm, 105 mm, 110 mm, 115 mm, 120 mm, 125 mm, 130 mm, 135 mm, 145 mm or 150 mm.

[0040] The distance between the baffle 1 and the lower edge of the multi-roller distributor 8 is related to the installation angle of the multi-roller distributor 8, and the specific distance can be set according to the material speed and trajectory.

[0041] As an embodiment of the present invention, the contact depth between the baffle 1 and the material flow on the multi-roller distributor 8 is 30 to 100 mm. For example, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, 85 mm, 95 mm or 100 mm can be selected.

[0042] The baffle 1 contacts the material flow on the multi-roller distributor 8 to improve the distribution of surface solid fuel (eg, light coke powder). The above-mentioned contact depth can achieve an ideal effect for solid fuels of various particle sizes.

[0043] The contact depth mentioned in the present invention refers to the height difference between the lowest end and the highest end that the baffle 1 can contact with the material flow.

[0044] The angle between the baffle 1 and the material flow direction on the multi-roller distributor 8 of the present invention is: the angle between the plane where the axis of each roller of the multi-roller distributor 8 is located [hereinafter referred to as the axis plane] and the plane where the baffle 1 is located.

[0045] The lower edge of the multi-roller distributor 8 refers to the position between the axis plane and the lowest roller ( Figure 1 The intersection line on the lower right side of the roller) intersects the roller on the lower right side.

[0046] The distance between the baffle 1 and the lower edge of the multi-roller distributor 8 is the vertical distance between the baffle 1 and the above-mentioned intersection line on the lowest roller.

[0047] In order to understand the technical solution of the present invention more clearly, refer to Figure 1 The angle between the baffle 1 and the material flow direction on the multi-roller distributor 8 of the present invention is Figure 1 In Figure 1 When the baffle 1 is in contact with the material flow, the contact depth is Figure 1 d1 in .

[0048] The distance between the baffle 1 and the lower edge of the multi-roller distributor 8 is Figure 1 d2 in .

[0049] As an embodiment of the present invention, reference Figure 1 The first side of the baffle 1 is hinged to the support frame 10 through a second hinge 4 , the first end of the second hinge 4 is located at the center of the baffle 1 , and the second end is fixed to the support frame 10 .

[0050] As another embodiment of the present invention, refer to Figure 2 or Figure 3 The baffle 1 is a symmetrical structure with a central axis. The first side of the baffle 1 is hinged to the support frame 10 through the second hinge 4 and the third hinge 5. The first ends of the second hinge 4 and the third hinge 5 are symmetrically arranged on both sides of the central axis of the baffle 1, and the second ends are fixed to the support frame 10.

[0051] As an embodiment of the present invention, the support frame 10 is integrally provided with the multi-roller distributor 8 or separately provided, that is, the support frame 10 is a partial structure on the nine-roller distributor, or is a structure separately provided for fixing the oil cylinder 2 or the second hinge 4 and the third hinge 5.

[0052] Specifically, the support frame 10 is fixed on the steel structure, thereby improving the structural stability of the entire device.

[0053] The sintering distribution device of the present invention is provided with a baffle 1, which can adjust the distance between the baffle 1 and the lower edge of the multi-roller distributor 8 according to changes in process parameters and production conditions under the action of a driving device, thereby effectively suppressing fuel segregation during the distribution process and preventing a large amount of solid fuel 7 from being brought to the middle and lower part of the sintering trolley 9, so that the solid fuel 7 with low specific gravity or uneven particle size is more evenly distributed in the vertical direction of the sintering trolley 9, ensuring sufficient heat in the upper part of the sintering trolley 9 during the sintering process, improving the quality of the sintered ore, and at the same time reducing the consumption of solid fuel 7.

[0054] The invention has the advantages of simple structure, ingenious design, low manufacturing cost, simple maintenance, safety, reliability and long service life.

[0055] Specifically, tests on the sintering distribution device of the present invention used in actual smelting have shown that the device can effectively suppress fuel segregation during the distribution process, prevent a large amount of solid fuel 7 from being brought to the lower middle part of the sintering trolley 9, ensure the uniform distribution of the solid fuel 7 in the material layer in the vertical direction of the sintering trolley 9, improve the quality of the sintered ore, and reduce the amount of solid fuel 7 used.

[0056] For example, Hubei Xinye Steel is 300m 2The baffle of the present invention is used on the nine-roller distributor of the sintering machine to prevent the segregation of solid fuel in the sintering material. The results of a six-month trial show that the return rate of the sintering process is reduced from 27% to 23%, a decrease of 4%, and the solid fuel consumption is reduced from 45kgce / t to 43kgce / t, a decrease of 2kgce / t. At the same time, the low-temperature reduction differentiation rate of the sintered ore is improved, and the medium-temperature reduction degree of the sintered ore is increased by 2.3%, creating good economic benefits for the enterprise.

[0057] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A sintering material distribution device, characterized in that: The invention comprises a multi-roller distributor (8), a baffle (1) and a support frame (10), wherein the multi-roller distributor (8) and the baffle (1) are located above a sintering trolley (9), a first side of the baffle (1) is hinged to the support frame (10), and a second side opposite to the first side faces the lower edge of the multi-roller distributor (8); the baffle (1) is provided with a driving device, and the driving device can drive the baffle (1) to rotate around the hinge with the support frame (10); the driving device is an oil cylinder (2), the output end of the oil cylinder (2) is connected to the upper end or the middle part of the baffle (1), and the output end of the oil cylinder (2) is actuated to drive the baffle (1) to rotate; the oil cylinder The output end of (2) is connected to the upper part or the middle part of the baffle (1) through the first hinge (3); the first side of the baffle (1) is hinged to the support frame (10) through the second hinge (4), the first end of the second hinge (4) is arranged at the center of the baffle (1), and the second end is fixed to the support frame (10); the baffle (1) is a symmetrical structure with a central axis, the first side of the baffle (1) is hinged to the support frame (10) through the second hinge (4) and the third hinge (5), the first ends of the second hinge (4) and the third hinge (5) are symmetrically arranged on both sides of the central axis of the baffle (1), and the second ends are fixed to the support frame (10); The multi-roller distributor (8) is a nine-roller distributor; the support frame (10) is fixed on the steel structure; The output end of the oil cylinder (2) moves in a telescopic manner, driving the baffle (1) to rotate and forming an arc-shaped motion trajectory. The gap between the baffle (1) and the nine-roller distributor can be changed according to process requirements, thereby changing the contact depth between the baffle (1) and the material flow on the nine-roller distributor, blocking the solid fuel (7) on the upper part of the nine-roller distributor, allowing the sintering material (6) to enter the bottom of the sintering trolley (9) first, and then the solid fuel (7) and the sintering material (6) are distributed on the sintering trolley (9), so that the solid fuel (7) is evenly distributed in the vertical direction of the sintering trolley (9); the angle between the baffle (1) and the material flow direction on the multi-roller distributor (8) is 80~100°; the distance between the baffle (1) and the lower edge of the multi-roller distributor (8) is 50~150mm; the contact depth between the baffle (1) and the material flow on the multi-roller distributor (8) is 30~100mm.

2. The sintering material distribution device according to claim 1, characterized in that: The angle between the baffle (1) and the material flow direction on the multi-roller distributor (8) is 90°.

3. The sintering material distribution device according to claim 1, characterized in that: The support frame (10) and the multi-roller distributor (8) are integrally arranged or separately arranged.

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