Layered adding device for sintering fuel

Abstract

The utility model relates to a sintering fuel layering adding device which comprises a support, a material distribution auger, a return stroke auger and a stirring device, the material distribution auger and the stirring device are arranged on the support in parallel, a material receiving hopper is arranged on the top of one side of the material distribution auger, the bottom of the other side of the material distribution auger is connected with a feeding port of the return stroke auger, and a discharging port of the return stroke auger discharges materials to the material receiving hopper. A blanking seam is formed in the bottom of the distribution auger, the width of the blanking seam is adjusted by an adjusting device, the stirring device comprises a rotating shaft, and a stirring tooth bar is arranged on the surface of the rotating shaft. According to the utility model, sintering fuel upper-layer addition of the sintering material is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of sintering, in particular to a device for layered addition of sintering fuel. Background Art

[0002] Research on the heat migration law during the sintering process shows that the existing process of evenly adding sintered solid fuel to the mixture through a mixer has obvious disadvantages: the self-heat storage effect of the sintering material layer brings abundant heat to the lower layer, which is manifested as a wide combustion bandwidth, high temperature, and good sintered ore quality; the upper layer lacks heat and the sintered ore quality is poor.

[0003] In order to solve the above shortcomings, the fuel addition technology is adopted. Part of the fuel is added between the primary and secondary mixers. The added fuel is attached to the surface of the mixed material pellets through the secondary mixer to help the ignition and combustion of the fuel. Facts have proved that the effect of this external fuel technology is not ideal. Since solid fuel is a hydrophobic substance, simply adding solid fuel to the outside will not have a good adhesion effect. In addition, compared with the mixed material, the solid fuel has a smaller mass. The fuel that is not attached to the surface of the mixed material pellets is not easy to be evenly distributed in the mixed material, which can easily cause uneven heat in the sintering process, increase the internal circulation return ore, and reduce the production efficiency of the sintering machine.

[0004] A further improvement technology is to design a fuel grading screening system in the fuel addition process, screen out the -1mm fine coke powder, and pneumatically convey it to the coke powder external distribution bin after the second-stage mixer for external distribution, changing the original -3mm coke powder for both internal and external distribution. As the proportion of -1mm fine coke powder external distribution increases, the +3mm particle size in the sintering material decreases, the original permeability of the material layer deteriorates, but the amount of fine coke powder adhesion on the surface of the material ball increases, and the fixed carbon content of the upper layer increases. The -1mm fine coke powder is externally distributed, changing the original -3mm coke powder for both internal and external distribution of fuel addition, solving the inherent defects of insufficient upper layer heat and high return rate of thick material layer sintering, improving the combustion kinetics of the fuel, and achieving good results in reducing solid fuel consumption and increasing drum strength. The simultaneous addition of calcium flux and fuel is conducive to the formation of calcium ferrite, improving the sintering yield, and reducing fuel consumption. However, there are special requirements for fuel particle size, and fuel below 1mm needs to be removed, so an additional screening system is required. At the same time, the fuel is still evenly distributed in the entire material layer. Although it improves the lack of fuel in the upper layer of the sintering material layer, it cannot improve the essential defect of excess heat in the lower layer of the sintering material layer.

[0005] To optimize the combustion process of sintering materials and solve the problem of insufficient heat in the upper layer, it is necessary to increase the fuel in the upper layer of the sintering mixture and delay the combustion time of the fuel in the upper layer of the sintering mixture. However, this cannot be done in reality due to process equipment reasons. Summary of the invention

[0006] The technical problem to be solved by the utility model is to provide a device for adding sintering fuel in layers, so as to solve the problem of insufficient heat in the upper layer of sintering material and poor quality of sintered ore.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A device for layered distribution of sintering fuel comprises a bracket, a distribution auger, a return auger and a stirring device. The distribution auger and the stirring device are arranged in parallel on the bracket. A receiving hopper is provided on the top of one side of the distribution auger, and the bottom of the other side is connected to the feed port of the return auger. The discharge port of the return auger discharges materials into the receiving hopper. A blanking gap is provided at the bottom of the distribution auger, and the width of the blanking gap is adjusted by an adjusting device. The stirring device comprises a rotating shaft, and a stirring tooth rod is provided on the surface of the rotating shaft.

[0009] The adjusting device comprises a movable plate, on which a plurality of screw adjusting mechanisms are connected, the screw adjusting mechanisms comprising a screw box, which is connected to the movable plate, through which an adjusting screw passes, one end of which is fixedly connected to the housing of the fabric auger, and a worm gear is connected to the adjusting screw, which meshes with the worm gear for transmission, and the worms of the screw adjusting mechanisms are connected to each other through a coupling device, and a hand wheel is connected to the outer end of the worm gear.

[0010] The adjustment range of the blanking seam width is 0-4cm.

[0011] The rotating shaft is connected with the bracket through the bearing seat, the bracket is connected with the frame bolt through the long hole, the bracket is connected with the lead screw lifting and lowering adjustment device, and the bracket is provided with a ruler.

[0012] The rotating shaft is driven by a stirring motor.

[0013] The exterior of the rotating shaft is connected to a protective cover.

[0014] The stirring tooth rod is a pointed round rod.

[0015] The stirring tooth rods are arranged in multiple rows in a spiral staggered manner.

[0016] Compared with the existing technology, the beneficial effects of the utility model are:

[0017] The utility model realizes the upper layer distribution of sintering fuel for sintering materials, and the width of the blanking seam at the bottom of the distribution auger can be adjusted in the range of 0-4cm. It can not only ensure that the distributed fuel is evenly distributed on the horizontal surface of the sintering material layer, but also can cooperate with the auger speed adjustment to adapt to the adjustment of the distributed fuel ratio. The blanking seam adjustment device is easy to operate, and only needs to turn the adjustment hand wheel. The return auger can automatically return the remaining fuel at the tail of the distribution auger to the receiving hopper of the distribution auger, and re-distribute the material, eliminating uneven distribution at the tail of the auger, preventing the distribution auger from getting stuck, and avoiding the trouble of manual cleaning. The stirring gear rod of the stirring device adopts a multi-row spiral staggered arrangement to ensure the uniformity of the stirring effect. The stirring gear rod is designed as a pointed round rod to reduce the sticking of the gear rod. The stirring device can be adjusted up and down as a whole, and the adjustment range can be viewed through a ruler, which can adapt to the adjustment of the stirring thickness of the material layer and the overall thickness of the sintering material layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a side view schematic diagram of the utility model.

[0020] Figure 3 It is a bottom view of the utility model.

[0021] Figure 4 It is a schematic diagram of the regulating device of the utility model.

[0022] Figure 5 A partial schematic diagram of the stirring device.

[0023] Figure 6 Schematic diagram of the adjustment mechanism.

[0024] In the figure: bracket 1, material distribution auger 2, return auger 3, stirring device 4, receiving hopper 5, shell 6, blanking gap 7, blanking gap 7, adjusting device 8, rotating shaft 9, stirring gear rod 10, moving plate 11, adjusting mechanism 12, screw box 13, adjusting screw 14, worm gear 15, worm 16, coupling device 17, hand wheel 18, material distribution motor 19, return motor 20, long hole 22, lifting adjustment device 23, stirring motor 21, protective cover 24, bracket 25, bearing seat 26, ruler 27. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means more than two.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0028] like Figure 1-Figure 6 A device for layered distribution of sintering fuel is arranged between a distributor and an igniter, and comprises a bracket 1, a distribution auger 2, a return auger 3, and a stirring device 4. The distribution auger 2 and the stirring device 4 are arranged in parallel on the bracket 1. A receiving hopper 5 is provided on the top of one side of the distribution auger 2, and the bottom of the other side is connected with the feed port of the return auger 3, and the discharge port of the return auger 3 discharges materials to the receiving hopper 5; a blanking gap 7 is provided at the bottom of a shell body 6 of the distribution auger 2, and the width of the blanking gap 7 is adjusted by an adjusting device 8. The stirring device 4 comprises a rotating shaft 9, and a stirring tooth rod 10 is provided on the rotating shaft 9.

[0029] The adjusting device 8 includes a moving plate 11, and a plurality of screw adjustment mechanisms 12 are connected to the moving plate 11. The screw adjustment mechanism 12 includes a screw box 13, which is connected to the moving plate 11. An adjusting screw 14 passes through the screw box 13. One end of the adjusting screw 14 is fixedly connected to the housing 6 of the fabric auger 2. A worm wheel 15 is connected to the adjusting screw 14 through a threaded fit. The worm wheel 15 is meshed with the worm 16 for transmission. The worms 16 of the screw adjustment mechanisms 12 are connected to each other through a coupling device 17. A hand wheel 18 is connected to the end of the outer worm 16. The hand wheel 18 is rotated to drive the worm 16 and the worm wheel 15 to rotate, and the moving plate 11 is driven to move at the bottom of the blanking seam 6, thereby adjusting the width of the blanking seam 6.

[0030] The width adjustment range of the blanking seam 6 is 0-4 cm.

[0031] The spiral conveying shaft of the material distribution auger 2 is driven by the material distribution motor 19 .

[0032] The spiral conveying shaft of the return auger 3 is driven by the return motor 20 .

[0033] The rotating shaft 9 is connected to the bracket 25 through the bearing seat 26, and the bracket 25 is bolted to the frame 1 through the long hole 22. The bracket 25 is connected to the screw lifting adjustment device 23, and the bracket 25 is provided with a scale 27. The height of the stirring device 4 is adjusted by adjusting the screw lifting adjustment device 23.

[0034] The rotating shaft 9 is driven by a stirring motor 21 .

[0035] The outside of the rotating shaft 9 is connected to a protective cover 24 .

[0036] The stirring tooth rod 10 is a pointed round rod.

[0037] The stirring gear rods 10 are arranged in multiple rows in a staggered spiral.

[0038] The length of the stirring tooth rod 10 is 15-20 mm.

[0039] The stirring gear rod 10 is movably connected to the rotating shaft for easy replacement.

[0040] Method of using the device for sintering fuel layering:

[0041] Most of the solid fuel in the sintering raw materials and other sintering raw materials are fed into the sintering machine to form a sintering mixed material layer, and the remaining solid fuel is added to the surface of the sintering mixed material layer from the distribution auger 2 of the adding device; and stirred and mixed into the 5-15cm thick material layer of the upper layer of the sintering mixed material by the stirring device 4, so as to achieve the purpose of sintering fuel layering.

[0042] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. In addition, the various different embodiments of the present invention can also be arbitrarily combined, as long as they do not violate the idea of ​​the present invention, they should also be regarded as the contents disclosed by the present invention.

[0043] In order to make the purpose, technical scheme and technical effect of the utility model clearer, the technical scheme in the embodiment of the utility model is now described clearly and completely. However, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. In combination with the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] Example 1

[0045] A device for layered distribution of sintering fuel is arranged between a distributor and an igniter, and comprises a bracket 1, a distribution auger 2, a return auger 3, and a stirring device 4. The distribution auger 2 and the stirring device 4 are arranged in parallel on the bracket 1. A receiving hopper 5 is provided on the top of one side of the distribution auger 2, and the bottom of the other side is connected to the feed port of the return auger 3. The discharge port of the return auger 3 discharges materials into the receiving hopper 5; the spiral conveying shaft of the return auger 3 is driven by a return motor 20.

[0046] The spiral conveying shaft of the fabric auger 2 is driven by a fabric motor 19, which is frequency-controlled and has an adjustable speed of 10-25 rpm.

[0047] The bottom of the housing 6 of the fabric auger 2 is provided with a blanking seam 7, and the width of the blanking seam 7 is adjusted by an adjusting device 8. The adjusting device 8 includes a moving plate 11, and a plurality of screw adjustment mechanisms 12 are connected to the moving plate 11. The screw adjustment mechanism 12 includes a screw box 13, and the screw box 13 is connected to the moving plate 11. An adjusting screw 14 passes through the screw box 13, and one end of the adjusting screw 14 is fixedly connected to the housing 6 of the fabric auger 2. The screw 15 is threadedly connected to the adjusting screw 14, and the worm 15 is meshed with the worm 16 for transmission. The worms 16 of the screw adjustment mechanisms 12 are connected to each other through a coupling device 17, and a hand wheel 18 is connected to the end of the outer worm 16. Rotating the hand wheel 18 drives the worm 16 and the worm wheel 15 to rotate, and drives the moving plate 11 to move at the bottom of the blanking seam 6, thereby adjusting the width of the blanking seam 6, and the width adjustment range is 0-4cm.

[0048] The stirring device 4 includes a rotating shaft 9, on which a stirring gear rod 10 is provided, and the stirring gear rod 10 is a pointed round rod. The length of the stirring gear rod 10 is 15-18 mm. The rotating shaft 9 is connected to the bracket 25 through a bearing seat 26, and the bracket 25 is bolted to the frame 1 through a long hole 22. The bracket 25 is connected to a screw lifting adjustment device 23, and a scale 27 is provided on the bracket 25. The height of the stirring device 4 is adjusted by adjusting the screw lifting adjustment device 23. The rotating shaft 9 is driven by a stirring motor 21.

[0049] Example 2

[0050] A device for layered distribution of sintering fuel is arranged between a distributor and an igniter, and comprises a bracket 1, a distribution auger 2, a return auger 3, and a stirring device 4. The distribution auger 2 and the stirring device 4 are arranged in parallel on the bracket 1. A receiving hopper 5 is provided on the top of one side of the distribution auger 2, and the bottom of the other side is connected to the feed port of the return auger 3. The discharge port of the return auger 3 discharges materials into the receiving hopper 5; the spiral conveying shaft of the return auger 3 is driven by a return motor 20.

[0051] The spiral conveying shaft of the fabric auger 2 is driven by the fabric motor 19. A blanking slit 7 is provided at the bottom of the housing 6 of the fabric auger 2. The width of the blanking slit 7 is adjusted by an adjusting device 8. The adjusting device 8 includes a moving plate 11. A plurality of screw adjustment mechanisms 12 are connected to the moving plate 11. The screw adjustment mechanism 12 includes a screw box 13. The screw box 13 is connected to the moving plate 11. An adjusting screw 14 passes through the screw box 13. One end of the adjusting screw 14 is fixedly connected to the housing 6 of the fabric auger 2. A worm gear 15 is connected to the adjusting screw 14 through a threaded fit. The worm gear 15 is meshed with the worm 16 for transmission. The worms 16 of the screw adjustment mechanisms 12 are connected to each other through a coupling device 17. A hand wheel 18 is connected to the end of the outer worm 16. The hand wheel 18 is rotated to drive the worm 16 and the worm gear 15 to rotate, and the moving plate 11 is driven to move at the bottom of the blanking slit 6, thereby adjusting the width of the blanking slit 6. The width adjustment range is 0-4cm.

[0052] The stirring device 4 includes a rotating shaft 9, on which a stirring gear rod 10 is arranged. The stirring gear rod 10 is a pointed round rod arranged in multiple rows of spiral staggered positions. The stirring gear rod 10 is threadedly detachably connected to the rotating shaft 9, and the length of the stirring gear rod 10 is 15-20 mm. The outside of the rotating shaft 9 is connected to a protective cover 24.

[0053] The rotating shaft 9 is connected to the bracket 25 through the bearing seat 26, and the bracket 25 is bolted to the frame 1 through the long hole 22. The bracket 25 is connected to the screw lifting adjustment device 23, and the bracket 25 is provided with a scale 27. The height of the stirring device 4 is adjusted by adjusting the screw lifting adjustment device 23. The rotating shaft 9 is driven by the stirring motor 21.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and basic spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for adding sintering fuel in layers, characterized in that: The utility model comprises a support, a material distributing auger, a return auger and a stirring device. The material distributing auger and the stirring device are arranged in parallel on the support. A receiving hopper is provided on the top of one side of the material distributing auger, and the bottom of the other side is connected with the feeding port of the return auger. The discharging port of the return auger discharges materials into the receiving hopper. A blanking gap is provided at the bottom of the material distributing auger, and the width of the blanking gap is adjusted by an adjusting device. The stirring device comprises a rotating shaft, and a stirring tooth rod is provided on the surface of the rotating shaft.

2. The device for adding sintering fuel in layers according to claim 1, characterized in that: The adjusting device comprises a movable plate, on which a plurality of screw adjusting mechanisms are connected, the screw adjusting mechanisms comprising a screw box, which is connected to the movable plate, through which an adjusting screw passes, one end of which is fixedly connected to the housing of the fabric auger, and a worm gear is connected to the adjusting screw, which meshes with the worm gear for transmission, and the worms of the screw adjusting mechanisms are connected to each other through a coupling device, and a hand wheel is connected to the outer end of the worm gear.

3. The device for adding sintering fuel in layers according to claim 1, characterized in that: The adjustment range of the blanking seam width is 0-4cm.

4. The device for adding sintering fuel in layers according to claim 1, characterized in that: The rotating shaft is connected with the bracket through the bearing seat, the bracket is connected with the frame bolt through the long hole, the bracket is connected with the lead screw lifting and lowering adjustment device, and the bracket is provided with a ruler.

5. The device for adding sintering fuel in layers according to claim 1, characterized in that: The rotating shaft is driven by a stirring motor.

6. The device for adding sintering fuel in layers according to claim 1, characterized in that: The exterior of the rotating shaft is connected to a protective cover.

7. The device for adding sintering fuel in layers according to claim 1, characterized in that: The stirring tooth rod is a pointed round rod.

8. The device for adding sintering fuel in layers according to claim 1, characterized in that: The stirring tooth rods are arranged in multiple rows in a spiral staggered manner.

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