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CN-224230653-U - Device for reducing risk of overwet zone at middle and lower parts of sinter bed

CN224230653UCN 224230653 UCN224230653 UCN 224230653UCN-224230653-U

Abstract

The utility model provides a device for reducing the risk of an overwet zone at the middle and lower parts of a sinter bed, which comprises a preheating structure arranged in a sintering machine head trolley, wherein the preheating structure is arranged above a first air box below the sintering machine head trolley and is positioned at the middle layer position of a material distribution area in the sintering machine head trolley, the preheating structure comprises a plurality of spray pipes arranged along the width direction of the sintering machine head trolley, and inclined plates which are arranged at the end sides of the spray openings of the spray pipes and are sequentially connected with the spray pipes, and the inclined plates are upwards inclined at a certain angle towards the spraying direction of the spray pipes so that a local small cavity is formed at the lower part of the inclined plates. The utility model has simple and reliable structure, can obviously reduce the harm of the over-wet belt, improve the air permeability of the sintering material layer, improve the vertical sintering speed and the production efficiency and reduce the energy consumption.

Inventors

  • DAI YUSHAN
  • GUO JUNKAI
  • ZHU LINA
  • LIN GUOTAI
  • CHEN XULONG
  • Cui Dehe
  • WANG YIHUI
  • ZHOU WENBO
  • ZHANG WENQIAO
  • LI JIANBING
  • Que Renwu

Assignees

  • 福建三钢闽光股份有限公司
  • 福建省三钢(集团)有限责任公司

Dates

Publication Date
20260512
Application Date
20250304

Claims (6)

  1. 1. The device for reducing the risk of the overwet zone at the middle and lower parts of the sinter bed is characterized by comprising a preheating structure (2) arranged in a sintering machine head trolley (1), wherein the preheating structure (2) is arranged above a first air box (11) under the sintering machine head trolley (1) and is positioned at the middle layer position of a material distribution area in the sintering machine head trolley (1); The preheating structure (2) comprises a plurality of spray pipes (21) which are arranged along the width direction of the trolley (1) at the head of the sintering machine, and inclined plates (22) which are arranged at the end sides of the spray holes of the spray pipes (21) and are sequentially connected with the spray pipes (21), wherein the inclined plates (22) are upwards inclined at a certain angle towards the spraying direction of the spray pipes (21), so that a local small cavity (221) is formed at the lower part of the inclined plates.
  2. 2. Device for reducing the risk of excessive wetting zone in the middle and lower parts of a sinter bed according to claim 1, characterized in that the preheating structure (2) is communicated with the chimney high temperature section of an external cooler (4) through a hot air pipe (3), a regulating valve (31) is arranged on the pipe body of the hot air pipe (3) close to the cooler, and one end of the hot air pipe (3) far away from the cooler penetrates through and stretches into the sinter head trolley (1) and is communicated with each spray pipe (21).
  3. 3. Device for reducing the risk of excessive wetting of the lower part of a sinter bed according to claim 1, characterized in that the inclined plate (22) is arranged inclined upwards by an angle of 15 °.
  4. 4. Device for reducing the risk of excessive wetting of the lower middle part of a sinter bed according to claim 1, characterized in that the two side edges of the preheating structure (2) are at a distance from the side rail plates (12) of the sinter machine head trolley (1).
  5. 5. Device for reducing the risk of excessive wetting of the lower part of a sinter bed according to claim 1, characterized in that the inclined plate (22) is arranged at the upper edge of the nozzle (21); Or the inclined plate (22) is arranged at the nozzle end of the spray pipe (21), and at the moment, a through hole (222) communicated with the spray pipe (21) is formed in the inclined plate (22) corresponding to the nozzle end of the spray pipe (21) in a penetrating manner.
  6. 6. Device for reducing the risk of excessive wetting of the lower middle part of a sinter bed according to claim 2, characterized in that a heat insulation layer is arranged outside the body of the hot air pipe (3).

Description

Device for reducing risk of overwet zone at middle and lower parts of sinter bed Technical Field The utility model relates to the technical field of ferrous metallurgy, in particular to a device for reducing the risk of an over-wet zone at the middle and lower parts of a sinter bed. Background The sintering process is that the sintering mixture (iron-containing raw material, fuel, solvent, return ore, etc.) is mixed with proper amount of water, and the mixture is granulated, spread onto the bogie of sintering machine, and after the surface of the sintering mixture is ignited, the material layer is burnt from top to bottom and releases heat under the action of forced air draft of the lower air box, and the mixture is subjected to a series of physical and chemical changes under the action of high temperature to finally solidify into sintered ore. The sintered ore is used as a raw material for iron making, and is mixed with pellet ore, lump ore, coke and other materials according to a certain proportion, and the mixture is put into a blast furnace for smelting. However, there is a remarkable layering property during sintering, and it is classified into five zones, i.e., a sinter zone, a combustion zone, a preheating zone, a drying zone, and an excessively wet zone, according to the temperature change thereof and the difference of the physicochemical reactions occurring. Although the five belts appear in the sintering process are natural phenomena, the generation of over-wet belts can affect the air permeability of the sintering material layer, damage the produced mixture pellets, especially the phenomenon of the middle lower part of the sintering material layer is serious, further the vertical sintering speed and the production efficiency are reduced, and the energy consumption is increased. Therefore, we propose a device for reducing the risk of the lower part of the sinter bed being excessively wet, so as to solve the above problems in the prior art. Disclosure of utility model The utility model aims to provide a device for reducing the risk of an over-wet zone at the middle and lower parts of a sinter bed, so as to solve some technical problems in the prior art. The device for reducing the risk of the overwet zone at the middle and lower parts of the sinter bed comprises a preheating structure arranged in a sintering machine head trolley, wherein the preheating structure is arranged above a first bellows below the sintering machine head trolley and is positioned at the middle layer position of a material distribution area in the sintering machine head trolley; The preheating structure comprises a plurality of spray pipes which are arranged along the width direction of the trolley at the head of the sintering machine, and inclined plates which are arranged at the end sides of the spray openings of the spray pipes and are sequentially connected with the spray pipes, wherein the inclined plates are arranged at a certain angle in an upward inclined manner towards the spray direction of the spray pipes, so that a local small cavity is formed at the lower part of the inclined plates. Further, the preheating structure is communicated with a chimney high-temperature section of the external cooler through a hot air pipe, an adjusting valve is arranged on a pipe body of the hot air pipe, which is close to the cooler, and one end, far away from the cooler, of the hot air pipe penetrates through a trolley extending into the head of the sintering machine and is communicated with each spray pipe. Further, the inclined plate is disposed to be inclined upward by an angle of 15 °. Further, two side edges of the preheating structure are at a certain distance from side fence plates of the sintering machine head trolley. Further, the inclined plate is arranged at the upper edge of the spray pipe; Or the inclined plate is arranged at the nozzle end of the spray pipe, and at the moment, a through hole communicated with the spray pipe is formed in the position of the inclined plate corresponding to the nozzle end of the spray pipe. Further, an insulation layer is arranged outside the pipe body of the hot air pipe. Compared with the prior art, the technical proposal has the advantages of simple and reliable structure, obviously reduced harm of the over-wet belt, improved air permeability of the sinter bed, improved vertical sintering speed and production efficiency, and reduced energy consumption Drawings In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art. FIG. 1 is a schematic diagram of the structure of the present utility mo