Movable air sintering machine

Abstract

The invention belongs to the technical field of sintering equipment, and particularly relates to a movable air sintering machine. According to the technology, a plurality of sintering pallets in annular circulation are included, air receiving openings of the sintering pallets face the interior of a ring, a pallet air bellow is installed at each air receiving opening, and a movable air supply bellow is arranged in the ring formed by all the sintering pallets; the movable air supply box is divided into an annular circulating movable air supply part and an air duct, the movable air supply part is provided with a plurality of movable air supply ports which independently supply air to each trolley air box and are communicated with the air duct, and the air duct is provided with an air suction port for supplying air to the interior of the air duct. According to the design, the air leakage problem of the sintering machine can be fundamentally solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of sintering equipment, and in particular relates to a movable air sintering machine. Background Art

[0002] Sintering is to mix fine-grained iron-containing materials with fuel and flux in a certain proportion, then add water to wet, mix and granulate to form sintering raw materials, place them on a sintering device to ignite and burn, and rely on the high temperature generated by fuel combustion to promote a series of physical and chemical reactions. Use locally low-melting substances to soften and melt, generate a certain amount of liquid phase, wet and bond the iron ore particles, and form a porous block product with a certain strength after cooling, that is, sintered ore, which is the main method of iron ore powder agglomeration.

[0003] The main equipment for producing sintered ore is a belt sintering machine, referred to as a sintering machine for short. In 1911, the first continuous production belt sintering machine with an effective area of 8 m 2 was built and put into production, and it has a history of more than 100 years. Over the past century, the scientific and technological level, material technology, and industrial policies have undergone earth-shaking changes. The sintering machine equipment technology has also made great progress accordingly, but mainly in the aspect of the automation control level of the production process and the single-machine production capacity. There has been no major breakthrough in the main machine structure technology. The situation of high energy consumption and large pollution in sintering production still exists, making sintering production a backward production capacity that cannot meet the requirements of modern industrial policies.

[0004] The high energy consumption of the sintering machine is mainly caused by structural reasons. The main components of the sintering machine are the trolley and the air box. The air box is located below the trolley and is an open box with a length of about 100 m and a width basically equal to the width of the trolley. The trolley is a rectangular load-bearing frame structure with baffles on both sides, and the upper surface is paved with grate bars. Each trolley is about 5 m wide and about 1.5 m long. Dozens of trolleys are arranged in a row along the length direction and supported above the air box through tracks, and its length exactly completely covers the opening of the air box. Since there are baffles on both sides of the trolley, a large material trough equal in length to the air box is formed above the air box by the trolley row. During the sintering process, iron ore powder is evenly spread in the material trough formed by the trolley row. The fan takes air from the bottom of the trolley through the air box. Due to the action of negative pressure, the air above the trolley penetrates through the material layer and enters the air box, providing oxygen for the ignition and combustion of the materials in the material trough and completing the sintering operation. The structural schematic diagram of the sintering machine is as Figure 6 .

[0005] The sintering machine belongs to continuous production equipment. The trolley continuously runs from the head to the tail under the push of the driving device. The air box of the sintering machine is fixed. It is very difficult to achieve good sealing at the joint between the moving trolley and the fixed air box. Under the negative pressure of the air box, a large amount of air enters the air box from the joint surface between the trolley and the air box. This part of the air does not pass through the sintering material layer and does not supply oxygen to the sintering process, which is commonly known as air leakage. After more than a century of technological upgrading, up to now, the air leakage of the sintering machine is still as high as 40%, causing huge energy waste in sintering production and being the main factor affecting the energy consumption index of sintering production. Summary of the Invention

[0006] Based on the above deficiencies in the prior art, the technical problem to be solved by the present invention is: to provide a movable-air sintering machine that can fundamentally eliminate the air leakage problem of the sintering machine.

[0007] The movable-air sintering machine includes a number of sintering trolleys in a circular cycle. The air intake openings of the sintering trolleys face the inside of the ring. A trolley air box is installed at each air intake opening. A movable air supply box is arranged inside the ring formed by all the sintering trolleys;

[0008] The movable air supply box is divided into a movable air supply part and an air duct in a circular cycle. A number of movable air supply openings that supply air to each trolley air box separately and communicate with the air duct are arranged on the movable air supply part. An air suction opening for supplying air to the inside is arranged on the air duct.

[0009] Further, the relationship between the distance between two adjacent movable air supply openings and the distance between two adjacent sintering trolleys is: H2 = n * H1; where n is a positive integer; H1 is the distance between two adjacent movable air supply openings; H2 is the distance between two adjacent sintering trolleys.

[0010] Further, the movable air supply box includes two fixed air walls arranged at intervals. A flexible sealing belt that moves in a circle around the fixed air walls is installed between the two fixed air walls. The two fixed air walls and the flexible sealing belt together form a closed air duct. The flexible sealing belt is the movable air supply part. The movable air supply openings are opened on the flexible sealing belt, and the air suction openings are installed on the fixed air walls.

[0011] Further, the movable air supply box includes two fixed air walls arranged at intervals. A flexible sealing belt that moves in a circle around the fixed air walls is installed between the two fixed air walls. The two fixed air walls and the flexible sealing belt together form a closed air duct. The flexible sealing belt is the movable air supply part. The movable air supply openings are opened on the flexible sealing belt;

[0012] The flexible sealing belt is divided into an air supply section and a return section;

[0013] The mobile air supply port at the air supply section cooperates with the corresponding trolley bellows to supply air to the trolley bellows; the mobile air supply port at the return section does not cooperate with the trolley bellows and serves as an exhaust port.

[0014] Furthermore, an air locking valve is installed on the movable air supply port.

[0015] Furthermore, a first driving mechanism is provided corresponding to the flexible sealing belt to drive the flexible sealing belt to perform an annular circular motion.

[0016] Furthermore, a second driving mechanism is provided corresponding to the sintering trolleys for driving all the sintering trolleys to move in a circular cycle.

[0017] Furthermore, the first driving mechanism adopts a chain transmission method.

[0018] Furthermore, a sealing component is provided at the joint between the flexible sealing belt and each fixed wind wall.

[0019] Furthermore, the sealing assembly includes a fixed sealing ring and a movable sealing ring, both of which are annular in structure as a whole. The movable sealing ring is sealingly installed on the flexible sealing belt, and the fixed sealing ring is sealingly installed on the fixed wind wall.

[0020] The cross sections of the fixed sealing ring and the movable sealing ring are both groove structures with the opening facing upwards;

[0021] The outer groove wall of the movable sealing ring is attached to the inner groove of the fixed sealing ring in a sealed sliding fit; the outer groove bottom of the movable sealing ring is attached to the inner groove bottom of the fixed sealing ring in a sealed sliding fit.

[0022] Furthermore, the specific mode of the chain transmission is:

[0023] A ring-shaped chain is laid on the outside of each fixed wind wall; a slide rail for supporting the chain is installed on the fixed wind wall; and a plurality of cross-connecting rods are arranged on the winding sealing belt, and both ends of the connecting rods are connected with the chain links on the corresponding chain.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] This design changes the existing air supply mode of the sintering machine from the original fixed air supply to mobile air supply, and proposes a new structure of mobile air sintering machine that can implement independent air supply for a single sintering machine trolley, which can fundamentally eliminate the air leakage problem of the sintering machine and improve the energy consumption indicators of sintering production.

[0026] Furthermore, the main innovation of the present invention lies in: a trolley air box is arranged on the sintering trolley, and the trolley air box and the sintering trolley form an integral body and move together with the sintering trolley; a movable air supply box with movable air inlets is used to supply air to the sintering trolley. Each sintering trolley corresponds to a movable air inlet on the movable air supply box. In the air supply section, it is ensured that the movable air inlet is timely connected to the trolley air box on the sintering trolley and runs in the same direction as the sintering trolley at the same speed. When the trolley enters the working area, the movable air inlet is connected to the trolley air box to supply air to the sintering trolley, continuously providing the oxygen required for the combustion of the raw materials for sintering. After sintering is completed, the movable air inlet is separated from the sintering trolley air box, and the sintering trolley independently completes the subsequent processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, are used to explain the principles of the present disclosure. These accompanying drawings are included to provide a further understanding of the present disclosure and are included in this specification and form a part of this specification.

[0028] Figure 1 Schematic three-dimensional structure diagram of the present invention;

[0029] Figure 2 Configuration diagram of the present invention; Since the head star wheel and the tail star wheel block the head wheel of the flexible seal and the tail wheel of the flexible seal, in order to clearly show the complete structure of the movable air supply box, the head star wheel and the tail star wheel are not drawn according to the normal projection relationship in this figure, and only the tooth profiles of the head star wheel and the tail star wheel are schematically shown with imaginary lines.

[0030] Figure 3 Schematic cross-sectional structure diagram of the air supply box;

[0031] Figure 4 Schematic partial structure diagram of the movable air inlet;

[0032] Figure 5 For Figure 3 Enlarged structure diagram at position A in

[0033] Figure 6 Schematic structure diagram of a sintering machine in the prior art.

[0034] Reference numerals: 1, sintering trolley; 2, trolley air box; 3, movable air inlet; 3.1, air lock valve; 3.2, seal; 4, flexible seal belt; 5, seal assembly; 5.1, fixed seal ring; 5.2, movable seal ring; 6, suction port; 7, fixed air wall; 8, first driving mechanism; 8.1, slide rail; 8.2, chain; 8.3, connecting rod; 9, second driving mechanism; 10, head star wheel; 11, head wheel of flexible seal; 12, tail wheel of flexible seal; 13, tail star wheel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant content and do not limit the present disclosure. In addition, it should be noted that for the convenience of description, only the parts related to the present disclosure are shown in the drawings.

[0036] It should be noted that, without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and embodiments.

[0037] Embodiment

[0038] As Figures 1 to 5 shown, a mobile wind sintering machine described in this embodiment includes a plurality of sintering pallets 1 arranged in a circular cycle. The air intake openings of the sintering pallets 1 face the inside of the ring. A pallet air box 2 is installed at each air intake opening. A mobile air supply box is arranged inside the ring formed by all the sintering pallets 1.

[0039] The mobile air supply box is divided into a mobile air supply part and an air duct arranged in a circular cycle. A plurality of mobile air supply openings 3 for separately supplying air to each pallet air box 2 and communicating with the air duct are arranged on the mobile air supply part. An air extraction opening 6 for supplying air to the inside thereof is arranged on the air duct.

[0040] The relationship between the distance between two adjacent mobile air supply openings 3 and the distance between two adjacent sintering pallets 1 is: H2 = n * H1; where n is a positive integer; H1 is the distance between two adjacent mobile air supply openings 3; H2 is the distance between two adjacent sintering pallets 1. In application, the number of mobile air supply openings 3 is not less than the number of sintering pallets 1 in the air supply section. It can be selected to be in one-to-one correspondence, or the number of mobile air supply openings 3 can be greater than the number of sintering pallets 1 in the air supply section (such as Figure 1 , Figure 2 the horizontal section on the circular cycle in the figure. The mobile air supply opening 3 communicates with the pallet air box 2, that is, the sintering operation area.). The specific number is determined by combining the formula in this technical content and according to the overall length of the sintering machine and the number of sintering pallets 1, etc., as long as each sintering pallet 1 in the air supply section has a corresponding mobile air supply opening 3.

[0041] As Figures 1 to 3 shown, this embodiment further describes the technology according to the different installation positions of the air extraction opening 6. The common technical part is that the mobile air supply box includes two fixed air walls 7 arranged at intervals. A flexible sealing belt 4 that moves in a circle around the fixed air walls 7 is installed between the two fixed air walls 7. The two fixed air walls 7 and the flexible sealing belt 4 together form a closed air duct. The flexible sealing belt 4 is the mobile air supply part, and the mobile air supply opening 3 is opened on the flexible sealing belt 4.

[0042] When the air extraction opening 6 is installed on the fixed air wall, the air extraction opening 6 is installed on the fixed air wall 7.

[0043] Reference Figure 2 , when the moving air supply opening 3 at the return section (such as Figure 1 , Figure 2 the annular circulating lower horizontal section in) is used as the air extraction opening 6, the flexible sealing belt 4 is divided into an air supply section and a return section; the moving air supply opening 3 at the air supply section cooperates with the corresponding trolley air box 2 to supply air to the trolley air box 2; the moving air supply opening 3 at the return section does not cooperate with the trolley air box 2 and serves as the air extraction opening 6.

[0044] In order to control the air volume, a wind locking valve 3.1 is installed on the moving air supply opening 3 to control the amount of air supply and whether to supply air. When installing the wind locking valve 3.1, a sealing member 3.2 is installed at the mating part of the moving air supply opening 3 and the wind locking valve 3.1. The sealing member 3.2 is a known prior art and is mainly used for sealing. In use, it is opened when the moving air supply opening 3 needs to supply air to the trolley air box 2, otherwise it is closed. If the moving air supply opening 3 at the return section is used as the air extraction opening 6, the wind locking valve 3.1 also needs to be opened.

[0045] A second driving mechanism 9 for driving all the sintering trolleys 1 to move in an annular cycle is provided corresponding to the sintering trolley 1. The second driving mechanism 9 is a prior art and will not be described in detail here. As Figure 2 shown, its structure includes a head star wheel 10 and a tail star wheel 13, etc. The trolley row composed of the sintering trolleys 1 runs towards the tail star wheel 13 under the push of the head star wheel 10, and then turns to achieve annular cyclic movement. During implementation, refer to the existing transmission method of the annularly moving sintering trolley 1.

[0046] A first driving mechanism 8 for driving the flexible sealing belt 4 to move in an annular cycle is provided corresponding to the flexible sealing belt 4. In this embodiment, a chain drive method is used as the first driving mechanism 8. The specific chain drive method is as follows:

[0047] As Figure 3 or Figure 5 shown, an annular chain 8.2 is laid on the outside of each fixed air wall 7; a slide rail 8.1 for supporting the chain 8.2 is installed on the fixed air wall 7; a number of cross connecting rods 8.3 are provided on the flexible sealing belt 4, and both ends of the connecting rod 8.3 are connected to the chain links on the corresponding chain 8.2. The chain 8.2 is driven by a flexible sealing belt head wheel 11 and a flexible sealing belt tail wheel 12. The installation methods of the flexible sealing belt head wheel 11 and the flexible sealing belt tail wheel 12 are existing technologies. Refer to the sprocket drive in the prior art, which mainly includes a rotating shaft. The rotating shaft is driven by power to rotate, and then drives the flexible sealing belt head wheel 11 or the flexible sealing belt tail wheel 12 to rotate, thereby driving the chain 8.2 to achieve annular cyclic movement. The first driving mechanism 8 can also be other existing known technologies.

[0048] As Figure 5 shown, in order to further eliminate air leakage, a sealing assembly 5 is provided at the mating portion between the flexible sealing belt 4 and each fixed air wall 7. In this embodiment, it is preferred that the sealing assembly 5 includes a fixed sealing ring 5.1 and a movable sealing ring 5.2 that are both integrally annular structures. The movable sealing ring 5.2 is sealingly installed on the flexible sealing belt 4, and the fixed sealing ring 5.1 is sealingly installed on the fixed air wall 7; the cross-sections of both the fixed sealing ring 5.1 and the movable sealing ring 5.2 are trough structures with the openings facing upward; the outer trough wall of the movable sealing ring 5.2 is in sealing sliding fit against the inner trough of the fixed sealing ring 5.1; the outer trough bottom of the movable sealing ring 5.2 is in sealing sliding fit against the inner trough bottom of the fixed sealing ring 5.1. In application, other existing movable sealing technologies can also be adopted.

[0049] Furthermore, in order to improve the service life of the flexible sealing belt 4, it is made by splicing multiple heat-resistant steel plates with a thickness of 1 mm to 3 mm. The following technical solutions can be adopted during specific splicing:

[0050] The flexible sealing belt 4 is divided into three layers from the inside to the outside, namely the lower bearing plate, the sealing filler, and the upper bearing plate. The lower bearing plate and the upper bearing plate are riveted together by rivets. The lower bearing plate has three layers, namely the lower outer plate, the lower middle plate, and the lower inner plate. The lower outer plate, the lower middle plate, and the lower inner plate are respectively formed by splicing rectangular heat-resistant steel plates with the same size specifications along the short sides in sequence; the splicing seams of adjacent two rectangular heat-resistant steel plates on the lower outer plate and the lower inner plate correspond to the middle part of the lower middle plate; the upper bearing plate has three layers, namely the upper outer plate, the upper middle plate, and the upper inner plate. The upper outer plate, the upper middle plate, and the upper inner plate are respectively formed by splicing rectangular heat-resistant steel plates with the same size specifications along the short sides in sequence; the splicing seams of adjacent two rectangular heat-resistant steel plates on the upper outer plate and the upper inner plate correspond to the middle part of the upper middle plate.

[0051] The above manufacturing method of the flexible sealing belt 4 is just one example. During application, other numbers of bearing plates can also be adopted, or it can be made of wire ropes woven. In order to ensure sealing, multiple layers can be designed and sealing materials can be added between the layers.

[0052] During the operation of this embodiment, the air extraction port 6 is connected to a fan through a pipeline. Under the action of the fan, a negative pressure is formed inside the air duct to meet the requirements of the air flow characteristics required for sintering operations.

[0053] What is called air supply in the present invention is to generate air inside the sintering. Whether it is air extraction or air blowing is just a different way of air supply. Some sintering machines in the prior art adopt air extraction, and some sintering machines adopt air blowing.

[0054] The flexible sealing belt 4 winds around the upper, lower, front and rear perimeters of the fixed air wall 7 and maintains the seal. A movable air supply opening 3 is provided on the flexible sealing belt 4. Driven by the flexible sealing belt head pulley 11, the flexible sealing belt 4 runs in the same direction as the sintering pallet car 1 at the same speed. When the pallet car air box 2 enters the air supply section, the movable air supply opening 3 on the flexible sealing belt 4 docks with the pallet car air box 2 on the sintering pallet car 1 and runs synchronously. The air lock valve 3.1 on the movable air supply opening 3 opens, and air is supplied to the connected sintering pallet car 1 through the movable air supply opening 3, and the sintering pallet car 1 enters the sintering operation.

[0055] During the entire sintering process, the movable air supply opening 3 remains connected to the pallet car air box 2, continuously providing air for the combustion of the sintering raw materials. After the sintering operation is completed, the air lock valve 3.1 closes, and the sintering pallet car 1 continues to run along the pallet car running track, and after being redirected by the tail star wheel 13, it enters the return lane. The movable air supply opening 3 continues to run with the flexible sealing belt 4, and separates from the pallet car air box 2 when entering the arc area of the flexible sealing belt tail pulley 12, and after being redirected by the flexible sealing belt tail pulley 12, it enters the return journey. In this way, it runs in cycles to achieve continuous production operations.

[0056] In the description of this specification, the description with reference to terms such as "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments / ways or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments / ways or examples described in this specification and the features of different embodiments / ways or examples.

[0057] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0058] Those skilled in the art should understand that the above embodiments are only for clearly explaining the present disclosure, rather than limiting the scope of the present disclosure. For those skilled in the art, other changes or modifications can be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A mobile air sintering machine, comprising a number of sintering pallets (1) arranged in a circular cycle, with the air inlets of the sintering pallets (1) facing the inside of the ring. Characterized in that: A trolley air box (2) is installed at each air inlet, and a mobile air supply box is arranged inside the ring formed by all the sintering pallets (1). The mobile air supply box is divided into a mobile air supply part and an air duct arranged in a circular cycle. A number of mobile air supply openings (3) for separately supplying air to each trolley air box (2) and communicating with the air duct are arranged on the mobile air supply part, and an air suction opening (6) for supplying air to its interior is arranged on the air duct.

2. The mobile air sintering machine according to claim 1, Characterized in that: The relationship between the distance between two adjacent mobile air supply openings (3) and the distance between two adjacent sintering pallets (1) is: H2 = n * H1; where n is a positive integer; H1 is the distance between two adjacent mobile air supply openings (3); H2 is the distance between two adjacent sintering pallets (1).

3. The mobile air sintering machine according to claim 1, Characterized in that: The mobile air supply box includes two fixed air walls (7) arranged at intervals. A flexible sealing belt (4) that moves in a circular motion around the fixed air walls (7) is installed between the two fixed air walls (7). The two fixed air walls (7) and the flexible sealing belt (4) together form a closed air duct. The flexible sealing belt (4) is the mobile air supply part, and the mobile air supply openings (3) are opened on the flexible sealing belt (4), and the air suction openings (6) are installed on the fixed air walls (7).

4. The mobile air sintering machine according to claim 1, Characterized in that: The mobile air supply box includes two fixed air walls (7) arranged at intervals. A flexible sealing belt (4) that moves in a circular motion around the fixed air walls (7) is installed between the two fixed air walls (7). The two fixed air walls (7) and the flexible sealing belt (4) together form a closed air duct. The flexible sealing belt (4) is the mobile air supply part, and the mobile air supply openings (3) are opened on the flexible sealing belt (4). The flexible sealing belt (4) is divided into a air supply section and a return section. The mobile air supply openings (3) at the air supply section cooperate with the corresponding trolley air boxes (2) to supply air to the trolley air boxes (2); the mobile air supply openings (3) at the return section do not cooperate with the trolley air boxes (2) and serve as air suction openings (6).

5. The mobile air sintering machine according to claim 1, 2, 3 or 4, Characterized in that: A wind locking valve (3.1) is installed on the mobile air supply opening (3).

6. The mobile air sintering machine according to claim 3 or 4, Characterized in that: A first driving mechanism (8) for driving the flexible sealing belt (4) to move in a circular cycle is provided corresponding to the flexible sealing belt (4).

7. The mobile air sintering machine according to claim 5, Characterized in that: A second driving mechanism (9) for driving all the sintering pallets (1) to move in a circular cycle is provided corresponding to the sintering pallets (1).

8. The mobile air sintering machine according to claim 6, Characterized in that: The first driving mechanism (8) adopts a chain drive method.

9. The mobile air sintering machine according to claim 3 or 4, Characterized in that: A sealing assembly (5) is provided at the joint between the flexible sealing belt (4) and each fixed wind wall (7).

10. The mobile air sintering machine according to claim 9, Features: The sealing assembly (5) comprises a fixed sealing ring (5.1) and a movable sealing ring (5.2) both of which are in annular structures as a whole; the movable sealing ring (5.2) is sealingly mounted on the flexible sealing belt (4) and the fixed sealing ring (5.1) is sealingly mounted on the fixed wind wall (7); The cross sections of the fixed sealing ring (5.1) and the movable sealing ring (5.2) are both groove structures with the opening facing upwards; The outer groove wall of the movable sealing ring (5.2) is attached to the inner groove of the fixed sealing ring (5.1) in a sealed sliding fit; the outer groove bottom of the movable sealing ring (5.2) is attached to the inner groove bottom of the fixed sealing ring (5.1) in a sealed sliding fit.

11. The mobile air sintering machine according to claim 8, Features: The specific method of the chain transmission is: A chain (8.2) of an annular structure is laid on the outside of each fixed wind wall (7); a slide rail (8.1) for supporting the chain (8.2) is installed on the fixed wind wall (7); and a plurality of cross-connecting rods (8.3) are arranged on the winding sealing belt (4), and both ends of the connecting rods (8.3) are connected to the chain links on the corresponding chain (8.2).

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