CN106949740B - Sintering mixture segregation distributing device - Google Patents
Sintering mixture segregation distributing device Download PDFInfo
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- CN106949740B CN106949740B CN201610008003.9A CN201610008003A CN106949740B CN 106949740 B CN106949740 B CN 106949740B CN 201610008003 A CN201610008003 A CN 201610008003A CN 106949740 B CN106949740 B CN 106949740B
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- roller
- distributing device
- sintering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D2003/0001—Positioning the charge
- F27D2003/0006—Particulate materials
Abstract
The invention relates to the technical field of blast furnace iron-making sintering, and provides a sintering mixture segregation distributing device which comprises an upper multi-roller distributing device and a lower multi-roller distributing device, wherein the upper multi-roller distributing device and the lower multi-roller distributing device are arranged in an acute angle with the movement direction of a sintering trolley, and are arranged above the sintering trolley; the upper multi-roller distributing device receives the materials output by the round roller feeder and conveys the materials to the sintering trolley through the lower multi-roller distributing device, and part of the materials fall onto the sintering trolley through the roller spacing of the upper multi-roller distributing device and/or the lower multi-roller distributing device; the roller spacing of the lower multi-roller distributing device is not smaller than that of the upper multi-roller distributing device. The sintering mixture segregation distributing device is provided with a plurality of multi-roller distributing devices, so that uniform distribution can be effectively realized, the distributing distance is increased to a certain extent, and the grain segregation and the solid fuel segregation of the sintering mixture between the feeding layer and the discharging layer are facilitated.
Description
Technical Field
The invention relates to the technical field of blast furnace ironmaking sintering, in particular to a sintering mixture segregation distributing device.
Background
Sintering is used as an important process of blast furnace ironmaking, and has the disadvantages of high energy consumption and CO2The problems of large discharge amount, high return ore rate and the like are solved, and in order to further improve the output quality index of the sintered ore and achieve the effects of energy conservation and emission reduction, the thick/super-thick material layer sintering technology is popularized and applied. Because the thicker the sinter bed is, the stronger the automatic heat storage capacity of the bed is, the higher the energy utilization efficiency is, the lower the sintered solid fuel consumption is, the higher the sintered finished product rate is, and the improved sintered mineral content is.
However, after the sintering technology of thick/ultra-thick material layers is adopted, along with the continuous increase of the thickness of the sintered material layers in a sintering plant, the airflow resistance is increased due to the automatic heat storage function of the material layers, the air permeability of the material layers is poor, the combustion zone is widened, and the fuel cannot be reasonably distributed. Therefore, the distribution of carbon in the sintering mixture needs to be properly adjusted, i.e., proper carbon segregation is performed.
The contents of chemical components and fixed carbon in particles with different granularities in the sintering material are different, the carbon content in coarse granularity is low, and the carbon content in fine granularity is high, so that the reasonable distribution of the carbon content can be achieved through the segregation distribution of the granularity of the mixed material, and the sintering heat energy can be utilized most effectively. In addition, segregation cloth is an indispensable process technology for improving the air permeability of a sinter bed, and the segregation cloth is used for increasing the porosity of the sinter bed based on the principle that the same granularity is distributed on the same level and the porosity of the sinter bed is the largest, so that the granularity of a sinter mixture is gradually thickened from top to bottom along the trolley surface, and the overall improvement of the air permeability of the sinter bed is realized.
The most ideal sintering segregation distributing effect is as follows: 1) along the height direction of the trolley, the upper, middle and lower particle sizes are distributed reasonably, namely the fine particle size is at the upper part, the coarse particle size is at the lower part, and the carbon content is decreased gradually from top to bottom. 2) Along the width direction of the trolley, the mixture is uniformly distributed in the particle size, chemical components, moisture and the like, the material surface is smooth, certain looseness is realized, the accumulation or material pressing phenomenon is prevented, and the uniform air permeability of the mixture is ensured.
The sintering segregation distributing process can provide an effective way for reasonable utilization of heat energy of a sintering material layer and uniform and stable production of sinter quality, stable material layer thickness and reasonable segregation effect guarantee stable and smooth operation of thick material layer sintering production, on one hand, the uniform property of sintering materials in the width direction of a trolley is guaranteed, on the other hand, the reasonable particle size distribution and fuel distribution of the sintering materials in the height direction of the trolley are guaranteed, the air permeability of the material layer is improved, the automatic heat storage effect of the material layer is fully utilized in the thick material layer sintering, the strength of the upper part of the material layer is improved, the lower part of the material layer is prevented from being over-melted, and the sintering segregation distributing process has great significance for improving the quality of the sintering mineral.
The segregation distributing method for the domestic and foreign sintering mixture can be divided into the following steps: the reflecting plate, the magnetic roller cloth, the nine-roller cloth, the screen type cloth, the double-layer cloth, the airflow cloth and the like have certain limitations, and the actual effect is not very satisfactory. The magnetic roller distributing device is only suitable for the mixture taking magnetite as the main component, the effect is not obvious to other ores, the magnetic field intensity is not too large easily, otherwise, the material layer and the roller surface which are gathered can move relatively, the material particles in the material layer close to the roller surface are broken, the fine particle size is increased, and the air permeability is influenced. The reflecting plate distributing equipment is simple, but requires a higher distance between the circular roller distributor and the material surface and is easy to stick materials. When the moisture of the mixture is not tightly controlled, the sieve-type distributor is easy to block the sieve pores. The air flow distribution is to utilize the particles with different thicknesses to keep relatively static at different air flow speeds for segregation distribution, so that the particle size composition of the mixed material is required to be relatively stable, otherwise, the air flow speed cannot be controlled, and the segregation effect is influenced.
At present, a circular roller feeder and a nine-roller distributor are generally adopted in domestic sintering plants as a sintering segregation distributing system, the rotating speed of the circular roller and the nine-roller are controlled by a frequency converter, the problems of uneven and uniform material surface of a sizing and sintering trolley and the like are solved to a certain extent, the problems of the existing thick/super-thick material layer sintering are overcome, the effect of the circular roller and the nine-roller combined distributing mode on the particle segregation in the vertical direction of the material layer is not obvious, and the problem of the effective segregation of the material is difficult to solve.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem of thick material layer sintering, and provides a sintering mixture segregation distributing device which realizes reasonable segregation of particle size along the vertical direction of a material layer.
(II) technical scheme
In order to solve the technical problem, the invention provides a sintering mixture segregation distributing device which comprises an upper multi-roller distributing device and a lower multi-roller distributing device, wherein the upper multi-roller distributing device and the lower multi-roller distributing device are arranged in an acute angle with the movement direction of a sintering trolley, and are arranged above the sintering trolley; the upper multi-roller distributing device receives the materials output by the round roller feeder and conveys the materials to the sintering trolley through the lower multi-roller distributing device, and part of the materials fall onto the sintering trolley through the roller spacing of the upper multi-roller distributing device and/or the lower multi-roller distributing device; the roller spacing of the lower multi-roller distributing device is not smaller than that of the upper multi-roller distributing device.
Preferably, the inclination angle of the upper multi-roller distributing device is smaller than that of the lower multi-roller distributing device, and the rotating speed of the upper multi-roller distributing device is smaller than that of the lower multi-roller distributing device.
Preferably, the roll distances of the upper multi-roll distributing devices are equal; the roller spacing of the lower multi-roller distributing device is divided according to regions, and the roller spacing of each region is gradually increased along the moving direction of the trolley.
Preferably, the material grading device further comprises gas nozzles, the upper multi-roller distributor and the lower multi-roller distributor are distributed at intervals along the vertical direction, and the gas nozzles are used for jetting gas flow to the materials flowing through the intervals to realize the particle size grading of the materials.
Preferably, the gas flow of the gas nozzle faces obliquely upwards and forms an included angle within 45 degrees with the material flowing from the upper multi-roller distributor to the lower multi-roller distributor.
Preferably, the gas of the gas spray head is air or medium-pressure steam.
Preferably, baffles are arranged on the periphery and the top of the upper multi-roller distributing device, the lower multi-roller distributing device and the gas nozzle, so that the materials are prevented from scattering around under the action of the gas flow.
Preferably, the bottom ends of the materials where the upper multi-roller distributing device, the lower multi-roller distributing device and the gas nozzles are located are provided with air draft dust removal units.
Preferably, still include a plurality of settings and be used for the middle multiroll distributing device that the material was carried between upper portion multiroll distributing device and the multiroll distributing device of lower part, just upper portion multiroll distributing device, middle multiroll distributing device and the multiroll distributing device of lower part set up along vertical direction interval in proper order.
Preferably, the multi-roller distributor is a nine-roller distributor.
(III) advantageous effects
The technical scheme of the invention has the following beneficial effects: the sintering mixture segregation distributing device is provided with a plurality of multi-roller distributing devices, so that uniform distribution can be effectively realized, the distributing distance is increased to a certain extent, and the grain segregation and the solid fuel segregation of the sintering mixture between the feeding layer and the discharging layer are facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a sinter mix segregation distributing apparatus of an embodiment;
in the figure: 1. a secondary drum mixer; 2. a shuttle distributor; 3. a mixing bin; 4. a circular roller feeder; 5. an upper multi-roll distributor; 6. a gas shower; 7. a lower multi-roll distributor; 8. a baffle plate; 9. paving a bottom stock bin; 10. sintering the trolley; 11. and (5) igniting the furnace.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The sintering mixture segregation distributing device of this embodiment includes upper portion multi-roller distributing device 5 and lower part multi-roller distributing device 7 that are the acute angle setting with sintering pallet 10 direction of motion, just upper portion multi-roller distributing device 5 and lower part multi-roller distributing device 7 all set up the top of sintering pallet 10. Referring to fig. 1, the sintering carriage 10 moves to the right, and the upper multi-roll hopper 5 and the lower multi-roll hopper 7 are inclined to the upper right so as to form an acute angle with the sintering carriage 10.
The upper multi-roller distributing device 5 receives the material, namely the mixture, output by the circular roller feeder 4 and conveys the material to the sintering trolley 10 through the lower multi-roller distributing device 7. When the material passes through the upper multi-roller distributor 5 and the lower multi-roller distributor 7, part of the material falls onto the sintering trolley 10 through the roller spacing due to the roller spacing between the adjacent rollers. Obviously, the roller spacing is preset here, so that a certain segregation effect on the materials can be ensured. In addition, in order to ensure that the fine-grained materials are on the upper part and the coarse-grained materials are on the lower part of the sintering trolley 10, the roller spacing of the lower multi-roller distributor 7 is not smaller than that of the upper multi-roller distributor 5, and preferably, the roller spacing of the lower multi-roller distributor 7 is larger than that of the upper multi-roller distributor 5.
Here, through setting up upper portion multiple roll distributing device 5 and lower part multiple roll distributing device 7 to can effectively realize even cloth, also increase the cloth distance to a certain extent, be favorable to going up sintering mixture granularity segregation and solid fuel segregation between the unloading layer.
In order to ensure normal transportation of materials and obtain a better segregation effect, the inclination angle of the upper multi-roller distributor 5 in this embodiment is smaller than the inclination angle of the lower multi-roller distributor 7, and the rotation speed of the upper multi-roller distributor 5 is smaller than the rotation speed of the lower multi-roller distributor 7.
Specifically, the sintering mixture enters a shuttle distributor 2 through a secondary cylinder mixer 1, is uniformly distributed into a mixing bin 3 under the action of the shuttle distributor 2, and is uniformly, continuously and regularly fed onto an upper multi-roller distributor 5 through a round roller feeder 4.
The upper multi-roller distributing device 5 can be a group of five to nine small round rollers with the diameter of 120mm, which are driven by gears and rotate in the same direction. The inclination angle of the upper multi-roller distributing device 5 is preferably set to be a certain angle between 15 degrees and 30 degrees; the roll gaps are preferably, but not necessarily, the same, and when the roll gaps are the same, the roll gaps may be set to 3mm to 5 mm; the speed of rotation of the rollers is relatively slow, preferably between 80r/min and 100 r/min. The upper multi-roller distributing device 5 with the parameters has small angle and slow rotating speed, can realize that partial fine particle materials leak down from the gap of the small round roller, and can realize that the materials roll on the small round roller to loosen the materials, thereby having better granularity separation effect.
The material treated by the upper multi-roller distributing device 5 vertically falls on the lower multi-roller distributing device 7, and certainly has a certain horizontal speed under the inertia effect. The lower multi-roller distributing device 7 can be composed of a group of nine small round rollers with the diameter of 120mm, which are driven by gears and rotate in the same direction, and the inclination angle of the group of nine-roller distributing device is preferably set to be a certain angle between 45 degrees and 65 degrees; the roller spacing is divided into areas, and the roller spacing of each area is gradually increased along the movement direction of the trolley. Preferably, the roll spacing of the nine-roll distributing device of the embodiment is set to be 4mm, 4mm, 6mm, 6mm, 6mm, 8mm, 8mm and 8mm in sequence along the vertical direction.
Wherein, nine roller distributing devices in lower part adopt nine roller distributing devices can guarantee that the blanking of a certain point is sharp to roll, and the blanking of each point has the simultaneity when distributing to the platform truck, makes mixture granularity segregation reasonable to a certain extent moreover, can eliminate the uneven phenomenon of cloth height in addition for the platform truck charge level is more level and more smooth.
On this basis, the upper multi-roller distributor 5 and the lower multi-roller distributor 7 of the present embodiment are distributed at intervals in the vertical direction. The gas nozzles 6 are arranged corresponding to the spacing positions, the gas nozzles 6 are used for injecting gas flow to the materials flowing through the spacing positions and grading the particle size of the materials, so that the materials with small particles can be arranged on the upper portion of the trolley, and segregation distribution is realized.
Wherein, the direction of gas shower nozzle 6 and the material of vertical whereabouts become certain angle, preferably within 45, through selecting suitable gas velocity of flow, realize the compulsory hierarchical of material granularity for some materials that the granule is little can be arranged sintering pallet 10 upper portion, realize the segregation cloth.
In addition, the injected gas can adopt air or medium-pressure steam. Compared with the prior art, the air environment is better, and the dust removal requirement is low; the mixture can be preheated by medium-pressure steam, but the air is sucked from the lower part of the material layer, so that the leakage of the steam and the dust can be avoided. In order to reduce the environmental pollution caused by gas injection, baffle plates 8 are required to be additionally arranged around the upper multi-roller distributor 5, the gas nozzles 6 and the lower multi-roller distributor 7 for sealing, and please refer to fig. 1 further. Preferably, an air draft dust removal unit is arranged at the lower part of the material, so that the environmental pollution is further avoided. Here, the updraft dust removal unit is preferably arranged at the bottom end of the material corresponding to the upper multi-roller distributor 5, the gas nozzle 6 and the lower multi-roller distributor 7. Of course, the installation position of the air draft dust removal unit is not limited to the specific position of the bottom, and only the gas is required to flow towards the material direction.
In the sintering mixture segregation distributing device of the embodiment, the sintering trolley 10 moves from left to right and firstly passes through the bottom paving bin 9, so that certain materials are firstly paved on the sintering trolley 10 in advance. The sintering pallet 10 then passes the lower multi-roller distributor 7 and causes the material flowing out of the blanking end of the lower multi-roller distributor 7 to fall onto the previously laid material. The sintering trolley 10 continues to move towards the ignition furnace 11, so that the materials falling through the roller spacing of the lower multi-roller distributor 7 and the roller spacing of the upper multi-roller distributor 5 and the materials changing the original movement path under the action of the gas nozzles 6 successively fall onto the sintering trolley 10.
Through the sintering mixture segregation distributing device who adopts this embodiment, can realize along the reasonable segregation of bed of material vertical direction granularity, not only can improve the gas permeability of bed of material like this, the fuel has also obtained reasonable distribution moreover, forms the bed of material structure that upper portion fuel is many, and lower part fuel is few to help sintering ignition and convulsions sintering.
It should be noted that, in the sintering mixture segregation distributing device of this embodiment, a plurality of middle multi-roller distributing devices may be further disposed between the upper multi-roller distributing device 5 and the lower multi-roller distributing device 7, so as to further increase the distributing distance, and achieve a better segregation effect while achieving uniform distribution.
On the basis, the upper multi-roller distributing device 5, the middle multi-roller distributing device and the lower multi-roller distributing device 7 are preferably, but not necessarily, arranged at intervals in sequence along the vertical direction, so that the forced classification of the material granularity can be further realized by adopting the gas nozzles 6 at the corresponding intervals. In addition, nine-roller distributing devices can be specifically adopted in the upper multi-roller distributing device 5, the middle multi-roller distributing device and the lower multi-roller distributing device 7.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (10)
1. A sintering mixture segregation distributing device is characterized by comprising an upper multi-roller distributing device and a lower multi-roller distributing device which are arranged at acute angles with the movement direction of a sintering trolley, wherein the upper multi-roller distributing device and the lower multi-roller distributing device are both arranged above the sintering trolley; the upper multi-roller distributing device receives the materials output by the round roller feeder and conveys the materials to the sintering trolley through the lower multi-roller distributing device, and part of the materials fall onto the sintering trolley through the roller spacing of the upper multi-roller distributing device and/or the lower multi-roller distributing device; the roller spacing of the lower multi-roller distributing device is larger than that of the upper multi-roller distributing device, and the inclination angle of the upper multi-roller distributing device is smaller than that of the lower multi-roller distributing device.
2. The sinter mix segregation distributing device of claim 1, wherein the rotation speed of the upper multi-roller distributing device is less than that of the lower multi-roller distributing device.
3. The sinter mix segregation distributing device of claim 1, wherein the upper multi-roller distributing devices have equal roller spacing; the roller spacing of the lower multi-roller distributing device is divided according to regions, and the roller spacing of each region is gradually increased along the moving direction of the trolley.
4. The segregation distributing device for sintering mixture as claimed in claim 1, further comprising gas nozzles, wherein the upper multi-roller distributing device and the lower multi-roller distributing device are distributed at intervals along the vertical direction, and the gas nozzles are used for injecting gas flow to the material flowing through the interval positions to realize the grading of the particle size of the material.
5. The sinter mix segregation distributing device of claim 4, wherein the gas flow of the gas nozzle is directed obliquely upward and forms an angle of 45 ° or less with the material flowing from the upper multi-roller distributor to the lower multi-roller distributor.
6. The sinter mix segregation distributing device of claim 5, wherein the gas of the gas nozzle is air or medium pressure steam.
7. The segregation distributing device for sintering mixture as claimed in claim 6, wherein the upper multi-roller distributing device, the lower multi-roller distributing device and the gas nozzles are provided with baffles around and on top to prevent the material from scattering around under the action of the gas flow.
8. The segregation distributing device for sintering mixture as claimed in claim 7, wherein the bottom end of the material where the upper multi-roller distributing device, the lower multi-roller distributing device and the gas nozzle are located is provided with an air draft dust removal unit.
9. The segregation distributing device for sinter mixture as claimed in any one of claims 1 to 8, further comprising a plurality of intermediate multi-roller distributing devices disposed between the upper multi-roller distributing device and the lower multi-roller distributing device for material transportation, wherein the upper multi-roller distributing device, the intermediate multi-roller distributing device and the lower multi-roller distributing device are sequentially disposed at intervals along the vertical direction.
10. The sinter mix segregation distributing device of claim 9, wherein the multi-roller distributor is a nine-roller distributor.
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| CN112414139B (en) * | 2019-09-03 | 2022-04-12 | 中冶长天国际工程有限责任公司 | Layered segregation distributing device and distributing method for composite sintering mixture |
| CN111153611B (en) * | 2020-01-03 | 2023-09-29 | 中冶长天国际工程有限责任公司 | Movable multi-roller type rotary material distribution system and material distribution method for lime shaft kiln |
| CN114058839B (en) * | 2020-08-07 | 2023-06-23 | 中冶长天国际工程有限责任公司 | Sintered fuel particle size control device and control method |
| CN114251948B (en) * | 2020-09-22 | 2023-07-25 | 中冶长天国际工程有限责任公司 | Sintered fuel segregation distributing device and method |
| CN113483554B (en) * | 2021-05-14 | 2022-06-07 | 中冶长天国际工程有限责任公司 | Drying device and drying method for lump ore for blast furnace concentrate |
| CN113503722B (en) * | 2021-05-14 | 2022-06-14 | 中冶长天国际工程有限责任公司 | Drying device and drying method for multi-heat-source coupled heating lump ore |
| CN113739709A (en) * | 2021-09-08 | 2021-12-03 | 中冶长天国际工程有限责任公司 | Online detection method and online detection system for thickness of sintering material layer |
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| CN104075566A (en) * | 2013-03-26 | 2014-10-01 | 宝钢不锈钢有限公司 | Distributing device of sintering machine and distributing control method |
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| SU1661554A1 (en) * | 1988-10-14 | 1991-07-07 | Восточный филиал Института черной металлургии | Loading device for sinter burden |
| JP2005226113A (en) * | 2004-02-12 | 2005-08-25 | Kobe Steel Ltd | Method for charging sintering raw material |
| CN104180659B (en) * | 2013-05-22 | 2016-03-30 | 宝山钢铁股份有限公司 | Sintering machine head combination segregation distribution method |
| LU92261B1 (en) * | 2013-07-25 | 2015-01-26 | Wurth Paul Sa | Sinterstrand-charging device |
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| CN104075566A (en) * | 2013-03-26 | 2014-10-01 | 宝钢不锈钢有限公司 | Distributing device of sintering machine and distributing control method |
| CN103206859A (en) * | 2013-03-27 | 2013-07-17 | 莱芜钢铁集团有限公司 | Segregation and distribution device and segregation and distribution method of sintering machine |
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