Mixing granulation device for improving pelletizing rate of sintered ore

Abstract

The utility model belongs to the technical field of mixing granulation devices for sintered ores, and particularly relates to a mixing granulation device for improving the pelletizing rate of the sintered ores. Comprising a rotary drum granulator, supporting frames are arranged at the two ends of the rotary drum granulator, the two supporting frames are jointly provided with a water pipe through a pipe clamp, the water pipe is communicated with a plurality of atomizing nozzles, the two supporting frames are jointly provided with a rake shaft through a bearing seat, a plurality of rake hooks are welded to the rake shaft, and an inclined plate is welded to the two supporting frames. And a plurality of industrial brushes are bolted on the inclined plate. According to the utility model, water can be uniformly sprayed to materials in the rotary drum granulator, the materials adhered to the inner wall can be brushed away, and meanwhile, the materials can be raked and beaten, so that the materials are prevented from being locally agglomerated and caked, the pelletizing rate is improved to be more than 75%, pelletized small balls after uniform water spraying are more compact, the air permeability of a material layer is improved, and the service life of the pelletized small balls is prolonged. Therefore, the unit power consumption is reduced from 35.9 kilowatt-hour / ton to 35.58 kilowatt-hour / ton.

Description

Technical Field

[0001] The utility model belongs to the technical field of mixing and granulating devices for sintered ore, in particular to a mixing and granulating device for improving the ball-forming rate of sintered ore. Background Art

[0002] In the sintering process, pelletized balls are a key intermediate product. These balls are mainly made by mixing iron ore powder, additives and an appropriate amount of water, and rolling them into balls through a pelletizer. After granulation, the bulk density and air permeability of the iron ore powder can be improved, the quality and strength of the sintered ore can be improved, and the performance of the sintered ore can be improved by adding different additives, which provides important support for the entire sintering process. When granulating, the commonly used mixing granulation equipment is a rotary drum granulator, which rolls the material and water into balls in a rotary drum after adding them. At present, there are the following main problems in sintering granulation: when adding water, a water adding pipe is used, and the water adding points are concentrated and uneven, causing the material to stick locally while the other parts are relatively dry. The granulation ball rate can only reach 65%, and the low ball rate affects the sintering power consumption. At the same time, during granulation, some wet materials adhere to the inner wall of the drum granulator, and after accumulation, they form a large piece that falls off. After falling, they are still in a clumping shape and are difficult to disperse. It is necessary to shut down the machine regularly to scrape and break the adhered materials, which affects production and increases the workload of workers. Summary of the invention

[0003] The utility model aims to provide a mixing granulation device for improving the ball forming rate of sintered ore, so as to solve the problems existing in the prior art.

[0004] The utility model solves the technical problem by adopting the following technical scheme: a mixing granulation device for improving the ball forming rate of sintered ore, comprising a rotary drum granulator, support frames are arranged at both ends of the rotary drum granulator, a water pipe is installed on the two support frames through a pipe clamp, a plurality of atomizing nozzles are connected to the water pipe, a rake shaft is installed on the two support frames through a bearing seat, a plurality of rake hooks are welded on the rake shaft, an inclined plate is welded on the two support frames, and a plurality of industrial brushes are bolted on the inclined plate.

[0005] Furthermore, the water pipe is located above the material gathering area when the drum granulator is working, and the spray direction of the atomizing nozzle is downward.

[0006] Further, the rake shaft is located on the vertical center axis of the drum of the drum granulator.

[0007] Furthermore, the middle part of the rake hook is smoothly bent into an L-shape, and the free end of the rake hook is inclined toward the direction of rotation of the drum of the drum granulator and the free end of the rake hook is inclined toward the feeding end of the drum granulator.

[0008] Furthermore, the industrial brush is located above the horizontal radial section of the drum of the drum granulator, the bristle end of the industrial brush abuts against the inner wall of the drum of the drum granulator, and the bristle end of the industrial brush is tilted upward.

[0009] The utility model has the following beneficial effects:

[0010] 1. The utility model can spray water evenly on the materials in the drum granulator, and can brush off the materials adhering to the inner wall, and can rake and beat the materials at the same time, so as to prevent the materials from locally agglomerating and agglomerating, and improve the balling rate to more than 75%. After the uniform water spraying, the granulated balls are more compact, and the air permeability of the material layer is improved, so that the power consumption is reduced from 35.9 degrees / ton to 35.58 degrees / ton.

[0011] 2. The material is raked by the rake hook, and the material drives the rake hook to rotate. After reaching a high place, the material falls back. Without the drive of the material, the rake hook falls down by its own weight to hit the material. This process is repeated, so that the lumps in the material are broken up by raking and hitting, thereby improving the balling rate of the material.

[0012] 3. Use an industrial brush to brush off the materials adhering to the inner wall of the drum, so as to prevent the adhering large pieces of materials from agglomerating and falling, thereby improving the balling rate of the materials. At the same time, the liquid cleans the inner wall of the drum granulator to prevent the materials from adhering and being difficult to scrape off.

[0013] 4. Adding water through water pipes and atomizing nozzles can add water to different parts of the drum granulator at the same time. The way of adding water is more uniform and dispersed, so that the water is fully dispersed into the material, preventing the material from locally agglomerating and agglomerating, thereby improving the balling rate of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model.

[0015] Figure 2 It is a side sectional structural schematic diagram of the utility model.

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model in top view.

[0017] Figure 4 The utility model is a front view structural diagram of the feeding end of the rotary drum granulator.

[0018] Among them: 1. Drum granulator; 2. Support frame; 3. Pipe clamp; 4. Water pipe; 5. Atomizing nozzle; 6. Bearing seat; 7. Rake shaft; 8. Rake hook; 9. Inclined plate; 10. Industrial brush. DETAILED DESCRIPTION

[0019] The utility model will now be further described in detail with reference to the accompanying drawings.

[0020] like Figure 1-4 As shown, a mixing granulation device for improving the ball formation rate of sintered ore includes a rotary drum granulator 1. Support frames 2 are provided at both ends of the rotary drum granulator 1. A water pipe 4 is installed together on the two support frames 2 through a pipe clamp 3. A plurality of atomizing nozzles 5 are connected to the water pipe 4. A rake shaft 7 is installed together on the two support frames 2 through a bearing seat 6. A plurality of rake hooks 8 are welded to the rake shaft 7. An inclined plate 9 is welded together on the two support frames 2. A plurality of industrial brushes 10 are bolted to the inclined plate 9.

[0021] like Figure 4 As shown in the figure, the direction of the arrow is the direction of rotation of the drum of the drum granulator 1. When the drum rotates, the materials gather at Figure 4 On the left side of the middle drum, the water pipe 4 is installed on the support frame 2 above the material gathering area, and the spray direction of the atomizing nozzle 5 is downward, so as to spray the material below. It should be noted that the number of the atomizing nozzles 5 is determined according to the drum length and water spraying amount of the drum granulator 1.

[0022] like Figure 4 As shown, the vertical dotted line is the vertical center axis of the drum of the drum granulator 1, the horizontal dotted line is the horizontal center axis of the drum of the drum granulator 1, the rake shaft 7 is located on the vertical center axis of the drum of the drum granulator 1, and the material filling height of the present embodiment is located below the horizontal center axis of the drum of the drum granulator 1, so the rake shaft 7 is also located below the horizontal center axis of the drum of the drum granulator 1. The height of the rake shaft 7 in actual use can be determined according to the filling height of the material, with the height of the rake shaft 7 being higher than the material filling height. In general, the filling height of the material is much lower than the horizontal center axis of the drum of the drum granulator 1, otherwise the material is too high, resulting in a poor granulation effect.

[0023] The middle part of the rake hook 8 is smoothly bent into an L shape. Figure 4 As shown, Figure 4 The direction of the middle arrow indicates the direction of rotation of the drum of the drum granulator 1. The free end of the rake hook 8 is tilted toward the direction of rotation of the drum of the drum granulator 1, that is, the direction of the free end of the rake hook 8 is along the direction of rotation of the drum. Figure 3 As shown, Figure 3 The left side is the feed end of the drum granulator 1, and the free end of the rake hook 8 is inclined toward the feed end of the drum granulator 1. The purpose of this design is that when the material rolls here, the rake hook 8 raks the material, and the material drives the rake hook 8 to rotate. After reaching a high place, the material falls back, and the rake hook 8 falls down by its own weight without the drive of the material to hit the material, and this is repeated, so that the lumps in the material are broken by raking and hitting.

[0024] like Figure 4As shown, the industrial brush 10 is located above the horizontal radial section of the drum of the drum granulator 1. The horizontal radial section of the drum of the drum granulator 1 is a horizontal plane passing through the horizontal center axis of the drum, that is, Figure 4 In the horizontal plane where the middle horizontal dotted line is located, the bristle end of the industrial brush 10 abuts against the inner wall of the drum of the drum granulator 1, and the bristle end of the industrial brush 10 is tilted upward. If the bristle end of the industrial brush 10 is tilted downward, the bristles will be damaged too quickly, increasing the cost of use.

[0025] The working principle of the utility model is:

[0026] When in use, the water pipe 4 is connected to the water source, the drum granulator 1 is started, and the drum of the drum granulator 1 is rotated as shown in FIG. Figure 4 The material starts to rotate in the direction indicated by the arrow in the middle. After the material is added into the drum, it keeps rolling. Driven by the drum of the drum granulator 1, the material gathers in the Figure 4 At the position below the middle water pipe 4, after water is introduced into the water pipe 4, the water is sprayed toward the material through the atomizing nozzle 5, and the rake hook 8 rakes the material, and the material drives the rake hook 8 to rotate. After reaching a high place, the material falls back, and the rake hook 8 falls down due to its own weight without the drive of the material to hit the material, and this is repeated, so that the lumps in the material are broken by rake and hitting. The material adhering to the inner wall of the drum is brushed off by the industrial brush 10, so as to prevent the material from agglomerating.

[0027] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention shall fall within the scope of protection of the present invention.

[0028] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. A mixing granulation device for improving the ball forming rate of sintered ore, characterized in that: The invention comprises a rotary drum granulator, wherein both ends of the rotary drum granulator are provided with support frames, a water pipe is installed on the two support frames through a pipe clamp, a plurality of atomizing nozzles are connected to the water pipe, a rake shaft is installed on the two support frames through a bearing seat, a plurality of rake hooks are welded on the rake shaft, an inclined plate is welded on the two support frames, and a plurality of industrial brushes are bolted on the inclined plate.

2. The mixing granulation device for improving the ball forming rate of sintered ore according to claim 1, characterized in that: The water pipe is located above the material gathering area when the drum granulator is working, and the spray direction of the atomizing nozzle is downward.

3. The mixing granulation device for improving the ball forming rate of sintered ore according to claim 1, characterized in that: The rake shaft is located on the vertical center axis of the drum of the drum granulator.

4. The mixing granulation device for improving the ball forming rate of sintered ore according to claim 2, characterized in that: The middle part of the rake hook is smoothly bent into an L shape, and the free end of the rake hook is inclined toward the rotation direction of the drum of the drum granulator and the free end of the rake hook is inclined toward the feeding end of the drum granulator.

5. The mixing granulation device for improving the ball forming rate of sintered ore according to claim 1, characterized in that: The industrial brush is located above the horizontal radial section of the drum of the drum granulator, the bristle end of the industrial brush abuts against the inner wall of the drum of the drum granulator, and the bristle end of the industrial brush is tilted upward.

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