Trolley grate bar of sintering machine

Abstract

The utility model relates to the field of metallurgy, in particular to a sintering machine trolley fire grate bar which comprises a grate bar body, a wear-resistant block is arranged on the grate bar body, the wear-resistant block is attached to the upper surface of the grate bar body, the wear-resistant block covers the upper surface of the grate bar body, and the wear-resistant block covers the upper surface of the grate bar body. And a fixing piece is arranged between the wear-resistant block and the grid section body. The grid section has the effect of reducing the cost.

Description

Technical Field

[0001] The present application relates to the field of metallurgy, and in particular to a grate bar for a sintering machine trolley. Background Art

[0002] The sintering machine is suitable for the sintering operation of large-scale ferrous metallurgical sintering plants. It is the main equipment in the exhaust sintering process. It can sinter concentrate powder and rich ore powder of different components and different particle sizes into blocks and partially eliminate harmful impurities such as sulfur and phosphorus contained in the ore. The trolley is a very important part of the sintering machine. The belt sintering machine is a closed sintering belt composed of many sets of trolleys. It consists of a trolley body, grate bars, railings, heat insulation, running wheels, card wheels and axles, and air sealing devices.

[0003] The grate bars of the sintering machine are the main parts on the sintering machine trolley and are consumable parts. The length of their service life directly affects the production rate of the sintering machine and the production cost of the sintered ore. During the generation process of the sintering system, the unqualified particles screened from the sintered finished ore are used as the bottom material on the grate bars of the sintering machine to prevent direct contact with the mixed material to cause bonding and paste. The working conditions of the grate bars of the sintering machine are very harsh, and the temperature changes greatly. The temperature of the grate bars during sintering is generally around 800℃, and after unloading, the temperature drops rapidly to 100℃-300℃ in the air. It works in a medium containing CO, CO2, SO2 and water vapor. During use, it is also hit and rubbed by the sintered ore. After long-term use, the grate bars are seriously worn out, and the operator needs to replace and scrap the entire grate bars on the trolley, which is very costly. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a sintering machine trolley grate bar, which can solve the technical problem of high cost.

[0005] The embodiment of the present application provides a sintering machine trolley grate bar adopting the following technical solution:

[0006] A sintering machine trolley grate bar comprises a grate bar body, a wear-resistant block is arranged on the grate bar body, the wear-resistant block is in contact with the upper surface of the grate bar body, the wear-resistant block covers the upper surface of the grate bar body, and a fixing piece is arranged between the wear-resistant block and the grate bar body.

[0007] Furthermore, the fixing member includes a fixing block arranged on the wear-resistant block, and a bolt threadedly connected between the fixing block and the grate bar body.

[0008] Furthermore, the number of fixed blocks on the wear-resistant block is three, two of which are located on one side of the wear-resistant block, and the other is located on the other side of the wear-resistant block, and the three fixed blocks are staggered.

[0009] Furthermore, a side wall of the grate bar body is provided with a receiving groove, and the fixing block is embedded in the receiving groove.

[0010] Furthermore, both ends of the wear-resistant block are provided with T-shaped blocks, and both ends of the grate bar body are provided with T-shaped slots, both ends of the T-shaped slots are through-set, and the T-shaped blocks are plug-fitted with the T-shaped slots.

[0011] Furthermore, the grate bar body is made of ductile iron.

[0012] Furthermore, the wear-resistant block is made of high-temperature nickel alloy.

[0013] Furthermore, the thickness of the wear-resistant block ranges from 30 to 50 mm.

[0014] Beneficial effects of the utility model:

[0015] The grate bar provided by the utility model has a better wear resistance performance than the grate bar body because the wear resistance block can make the grate bar body have a longer service life. The grate bar body made of ductile iron and the wear resistance block made of high-temperature nickel alloy are used in combination, which can greatly reduce the production cost. At the same time, after the wear resistance block is scrapped, the service life of the grate bar body can be extended by replacing the wear resistance block. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0018] Figure 2 This is an exploded schematic diagram of an embodiment of the utility model;

[0019] Figure 3 This is an exploded schematic diagram of an embodiment of the utility model;

[0020] The reference numerals are: 1, grate bar body; 11, boss; 12, receiving groove; 13, T-shaped groove; 2, wear-resistant block; 21, fixing block; 22, bolt; 23, T-shaped block; DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] The present application embodiment discloses a sintering machine grate bar, referring to Figure 1-3 , including a grate body 1. When in use, multiple grate bodies 1 are sequentially embedded into the trolley of the sintering machine. During sintering, the base material is laid on the upper surface of multiple grate bodies 1. At the same time, bosses 11 are integrally formed at both ends of the opposite side surfaces of the grate body 1. The bosses 11 can make a certain gap between two adjacent grate bodies 1 when multiple grate bodies 1 are spliced ​​together, so as to facilitate ventilation. In order to increase the service life of the grate body 1, a wear-resistant block 2 is provided on the grate body 1. The wear-resistant block 2 is rectangular in shape, fits against the upper surface of the grate body 1, and the four side edges of the wear-resistant block 2 and the upper surface of the grate body 1 are aligned. The wear-resistant block 2 covers the upper surface of the grate body 1. During the production process, the mineral material collides and rubs against the wear-resistant block 2. Since the wear-resistant block 2 has better wear resistance than the grate body 1, the grate body 1 can be used for a longer time, thereby increasing the replacement cycle of the grate body 1.

[0028] In addition, the grate bar body 1 is made of ductile iron, which is a high-strength cast iron material with comprehensive performance close to that of steel, low price, high strength, toughness and wear resistance. At the same time, the wear-resistant block 2 is made of high-temperature nickel alloy. High-temperature nickel alloy has high hardness and good oxidation resistance and gas corrosion resistance, and can be used in high-temperature corrosive environments. The grate bar body 1 made of ductile iron and the wear-resistant block 2 made of high-temperature nickel alloy can be used in combination to greatly reduce production costs. In addition, the thickness range of the wear-resistant block 2 is 30-50 mm. In this embodiment, the thickness of the wear-resistant block 2 is preferably 40 mm. The wear-resistant block 2 within this thickness range has a high service life and can reduce the replacement cycle.

[0029] In addition, a fixing part is provided between the wear-resistant block 2 and the grate body 1, specifically, the fixing part includes a fixing block 21 welded on the wear-resistant block 2, and a bolt 22 threadedly connected between the fixing block 21 and the grate body 1. At the same time, the fixing block 21 on the wear-resistant block 2 is set to three pieces, two of which are located on one side of the wear-resistant block 2, and the other is located on the other side of the wear-resistant block 2. The three fixing blocks 21 are staggered, and the three fixing blocks 21 are connected to the grate body 1 by bolts 22 to improve the firmness between the wear-resistant block 2 and the grate body 1. When the wear-resistant block 2 needs to be scrapped after long-term use, the bolt 22 is unscrewed to replace the wear-resistant block 2 from the grate body 1, and then a new wear-resistant block 2 is replaced, thereby improving the service life of the grate body 1. In addition, a receiving groove 12 is provided on the side wall of the grate body 1, and the fixing block 21 is embedded in the receiving groove 12. The receiving groove 12 can prevent the fixing block 21 and the bolt 22 from excessively protruding from the side of the grate body 1, thereby causing an excessively large gap between two adjacent grate bodies 1.

[0030] At the same time, T-shaped blocks 23 are welded at both ends of the surface of the wear-resistant block 2 facing the grate bar body 1, and T-shaped slots 13 are opened at both ends of the surface of the grate bar body 1 facing the wear-resistant block 2. The two ends of the T-shaped slot 13 are through-set, and the T-shaped block 23 is plugged into the T-shaped slot 13. The T-shaped block 23 is plugged into the T-shaped slot 13 to improve the connection stability between the wear-resistant block 2 and the grate bar body 1.

[0031] The implementation principle of a sintering machine trolley grate bar in an embodiment of the present application is as follows: during the production process, the ore material collides and rubs against the wear-resistant block 2. Since the wear-resistant block 2 has better wear resistance than the grate body 1, the grate body 1 can be used for a longer time. By using the grate body 1 made of ductile iron in combination with the wear-resistant block 2 made of high-temperature nickel alloy, the production cost can be greatly reduced. At the same time, after the wear-resistant block 2 is scrapped, the service life of the grate body 1 can be increased by replacing the wear-resistant block 2.

[0032] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sintering machine grate bar, characterized in that: It comprises a grate body, on which a wear-resistant block is arranged, the wear-resistant block is fitted with the upper surface of the grate body, the wear-resistant block covers the upper surface of the grate body, and a fixing piece is arranged between the wear-resistant block and the grate body.

2. The grate bar for a sintering machine according to claim 1, characterized in that: The fixing member comprises a fixing block arranged on the wear-resistant block, and a bolt threadedly connected between the fixing block and the grate bar body.

3. The grate bar for a sintering machine according to claim 2, characterized in that: There are three fixed blocks on the wear-resistant block, two of which are located on one side of the wear-resistant block, and the other fixed block is located on the other side of the wear-resistant block, and the three fixed blocks are staggered.

4. The grate bar for a sintering machine according to claim 3, characterized in that: The side wall of the grate bar body is provided with a receiving groove, and the fixing block is embedded in the receiving groove.

5. The grate bar for a sintering machine according to claim 1, characterized in that: Both ends of the wear-resistant block are provided with T-shaped blocks, and both ends of the grate bar body are provided with T-shaped slots. Both ends of the T-shaped slots are through-set, and the T-shaped blocks are plug-fitted with the T-shaped slots.

6. The grate bar for a sintering machine according to claim 1, characterized in that: The grate bar body is made of ductile iron.

7. The grate bar for a sintering machine according to claim 1, characterized in that: The wear-resistant block is made of high-temperature nickel alloy.

8. The grate bar for a sintering machine according to claim 1, characterized in that: The thickness of the damage-resistant block ranges from 30 to 50 mm.

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