CN112414139A

CN112414139A - Layered segregation distributing device and distributing method for composite sintering mixture

Info

Publication number: CN112414139A
Application number: CN201910834349.8A
Authority: CN
Inventors: 胡兵; 张俊涛; 何璐瑶
Original assignee: Zhongye Changtian International Engineering Co Ltd
Current assignee: Zhongye Changtian International Engineering Co Ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2021-02-26
Anticipated expiration: 2039-09-03
Also published as: CN112414139B

Abstract

A composite sinter mixture layering segregation distributing device, the device includes: a three-way distributor (1) and a multi-roller distributor (2) arranged below the three-way distributor (1); the three-way distributor (1) is of a pants-type structure, the upper space of the three-way distributor (1) forms a mixing bin (101), the lower part of the mixing bin (101) is connected with two channels which are respectively a first channel (102) and a second channel (103), the tail end of the first channel (102) is provided with a first discharge hole (104), and the tail end of the second channel (103) is provided with a second discharge hole (105); a first multi-roller distributing device (201) is correspondingly arranged below the first discharging port (104), and a second multi-roller distributing device (202) is correspondingly arranged below the second discharging port (105). The device disclosed by the invention is used for distributing materials, so that uniform distribution can be effectively realized, grain-level segregation is facilitated, a reasonable material layer structure is obtained, and the air permeability of a material layer is improved.

Description

Layered segregation distributing device and distributing method for composite sintering mixture

Technical Field

The invention relates to a distributing device for sintered materials, in particular to a layered segregation distributing device and a layered segregation distributing method for a composite sintered mixture, and belongs to the field of distributing equipment of sintering machines.

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 mine 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 (ultra-thick) material layer sintering technology is popularized and applied. However, after the sintering technology of the thick (ultra-thick) material layer is adopted, due to the automatic heat storage function of the material layer, the combustion zone is widened, the temperature of the lower layer is increased, the sintered ore is over-melted, and the air permeability and the yield quality index are reduced in the sintering process, so that the distribution of carbon in the sintered mixture needs to be properly adjusted, namely, proper carbon segregation is carried out.

The contents of chemical components and fixed carbon in particles of different grain grades in the sintering material are different, the carbon content in a coarse grain grade is low, and the carbon content in a fine grain grade is high, so that the reasonable distribution of the carbon content can be achieved through segregation distribution of the particle size 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 size distributions are reasonable, namely the fine particle fraction is at the upper part, the coarse particle fraction is at the lower part, and the carbon content is gradually reduced from top to bottom; 2) along the width direction of the trolley, the granularity, chemical components, moisture and the like of the mixture are uniformly distributed, 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 sintering production of a thick material layer, on one hand, uniform property of sintering materials in the width direction of a trolley is guaranteed, on the other hand, reasonable grain size distribution and fuel distribution of the sintering materials in the height direction of the trolley are guaranteed, air permeability of the material layer is improved, automatic heat storage effect of the material layer is fully utilized in sintering of the thick material layer, strength of the upper part of the material layer is improved, over-melting of the lower part is avoided, and the sintering segregation distributing process has great significance for improving quality of sintered mineral products, saving energy and reducing emission.

The segregation distributing method for the domestic and foreign sintering mixture can be divided into the following steps: reflecting plate, magnetic roll cloth, screen type cloth, double-layer cloth, airflow cloth, etc., but all 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 for other ores, the magnetic field intensity is not too large, otherwise, the gathered material layer and the roller surface generate relative movement, the material particles in the material layer close to the roller surface are broken, the fine particle level 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. In addition, when a conventional material distribution device is adopted to distribute the composite sintering mixture (high-alkalinity sintering mixture, namely matrix material and acidic pellets), the pellets are easy to excessively segregate at the bottom layer of the mixed material layer, and the reasonable distribution of the pellets in the material layer cannot be realized. The process requires that the upper material layer is a fine particle matrix material, so that the fuel content is high, and sintering ignition is facilitated; the middle and lower layers are the mixture of matrix material and pellet ore; a layer of base material is also arranged on the upper part of the bedding material, so that the lower part is prevented from having too good air permeability, being difficult to maintain high-temperature roasting and being not beneficial to sintering.

Disclosure of Invention

The problem that the existing material distribution mode is difficult to realize the effective segregation of the composite sintering mixture is solved, the blanking mode is changed, the bidirectional blanking of a three-way distributor adopting a pant-type structure is adopted, the material discharge amount is controlled, the material distribution device respectively passes through two multi-roller distributors arranged in opposite directions, the distance between round rollers of the multi-roller distributors is adjusted, so that partial small particle materials (namely base materials) drop from gaps of the multi-roller distributors, pellet and partial base materials fall on a sintering trolley through the multi-roller distributors, the purpose of the small particle base materials on the lower layer and the surface layer of the sintering trolley is realized, and the purpose of the pellet and other base materials on the middle and lower part of a material layer is realized.

According to a first embodiment of the invention, a composite sinter mix stratified segregation distributor is provided.

A composite sinter mixture layering segregation distributing device, the device includes: a three-way distributor and a multi-roller distributor arranged below the three-way distributor. The tee bend tripper is the pants structure, and the upper portion space of tee bend tripper forms a mixing bunker, and two passageways are connected to mixing bunker's sub-unit, are first passageway and second passageway respectively, and the end of first passageway is equipped with first discharge gate, and the end of second passageway is equipped with the second discharge gate. The multi-roller distributing device comprises a first multi-roller distributing device and a second multi-roller distributing device. A first multi-roller distributing device is correspondingly arranged below the first discharge port, and a second multi-roller distributing device is correspondingly arranged below the second discharge port.

Preferably, the first multi-roller distributing device and the second multi-roller distributing device are obliquely arranged, and the first multi-roller distributing device and the second multi-roller distributing device are oppositely arranged in an inverted splayed shape.

In the present invention, the apparatus further comprises a plate feeder. A first plate-type feeder is arranged between a first discharge port of the three-way material distributor and the first multi-roller distributing device, and a second plate-type feeder is arranged between a second discharge port of the three-way material distributor and the second multi-roller distributing device.

Preferably, the apparatus further comprises a plate feeder adjuster; and a first plate-type feeder adjuster is arranged on the first plate-type feeder, and a second plate-type feeder adjuster is arranged on the second plate-type feeder.

In the present invention, the apparatus further comprises a shuttle distributor. The shuttle distributor is arranged at the upper part of the mixing bin of the three-way distributor.

In the invention, the device also comprises a material distribution device; a first material distribution device is arranged at one end, close to the first multi-roller distributing device, of the first plate-type ore feeder, and a second material distribution device is arranged at one end, close to the second multi-roller distributing device, of the second plate-type ore feeder; the first material distribution device is arranged at the discharging side of the first multi-roller distributing device, and the second material distribution device is arranged at the discharging side of the second multi-roller distributing device; the first material distribution device and the second material distribution device are respectively provided with two or more than two feed openings in the running direction of the sintering machine trolley.

Preferably, the first material distribution device and the second material distribution device are both provided with a feed opening adjusting device. The feed opening adjusting device adjusts the caliber size of two or more feed openings on the first material distribution device, so that the feed amount of each feed opening on the first material distribution device is adjusted. The feed opening adjusting device adjusts the caliber size of two or more feed openings on the second material distribution device, so that the feed amount of each feed opening on the second material distribution device is adjusted.

Preferably, the apparatus further comprises a secondary barrel mixer. The discharge port of the secondary cylinder mixer is connected with a shuttle distributor. Preferably, a belt conveyor is further arranged at the lower part of the discharge port of the secondary cylinder mixer, and the composite sintering mixture in the secondary cylinder mixer is conveyed into the shuttle distributor through the belt conveyor.

In the invention, the device also comprises a sintering trolley arranged below the multi-roller distributor. Preferably, an ignition furnace and a bottoming bin are further arranged above the sintering trolley. Along the running direction of the sintering trolley, a bottom laying bin, a second multi-roller distributor, a first multi-roller distributor and an ignition furnace are sequentially arranged above the sintering trolley.

In the invention, the multi-roller distributor is composed of a plurality of round rollers, and the centers of the rollers of the round rollers are arranged in a straight line. Preferably, the number of the round rollers in the multi-roller distributor is 2-20, preferably 5-15, more preferably 8-12.

Preferably, the plurality of round rollers are driven by a driving device, and the plurality of round rollers rotate in the same direction. Preferably, the driving means is a gear.

Preferably, the adjacent round rollers have intervals, and the intervals can be adjusted according to the segregation requirement of the material layer structure, and the intervals are preferably 3-15mm, more preferably 5-10 mm.

Preferably, a first multi-roller distributing device adjusting device is arranged on the first multi-roller distributing device; and a second multi-roller distributing device adjusting device is arranged on the second multi-roller distributing device.

In the invention, the gaps among a plurality of round rollers in the multi-roller distributing device are adjustable, the distance between the round rollers can be adjusted according to actual requirements, and the intervals between the adjacent round rollers can be equal or unequal.

Preferably, the diameter of the round roller is 80 to 150mm, preferably 90 to 135mm, more preferably 100 to 120 mm.

In the present invention, the inclination angle of the multi-roll distributor is 5 to 45 °, preferably 10 to 40 °, more preferably 15 to 30 °. The inclination angle of the multi-roller distributing device refers to an included angle between the multi-roller distributing device and the horizontal plane, namely an included angle between a straight line formed by the centers of the rollers of all the round rollers in the multi-roller distributing device and the horizontal plane.

Preferably, the rotational speed of the individual round rollers in the multi-roller distributor is 40 to 150r/min, preferably 60 to 120r/min, more preferably 80 to 100 r/min.

According to a second embodiment of the invention, a method for distributing a composite sinter mix by segregation into layers is provided.

A method for distributing composite sintering mixture by layered segregation or a method using the device comprises the following steps:

1) the composite sintering mixture is discharged from a discharge port of the secondary cylinder mixer onto the adhesive tape machine, and the composite sintering mixture on the adhesive tape machine is uniformly distributed into a mixing bin at the upper part of the three-way distributor through a shuttle distributor;

2) the composite sintering mixture in the mixing bunker is divided to enter a first channel and a second channel of a three-way distributor, the composite sintering mixture in the first channel is discharged to a first plate-type ore feeder through a first discharge port, the composite sintering mixture in the second channel is discharged to a second plate-type ore feeder through a second discharge port, and the first plate-type ore feeder and the second plate-type ore feeder respectively convey the composite sintering mixture to a first multi-roller distributing device and a second multi-roller distributing device which correspond to each other;

3) along the running direction of the sintering trolley, a layer of bedding material is firstly paved on the sintering trolley by the bedding material cabin; then part of the base material in the composite sintering mixture on the second plate feeder falls onto the bedding material through the intervals between the round rollers of the second multi-roller distributor, namely a layer of fine base material is paved on the bedding material, and the base material and pellet mixture in the composite sintering mixture on the second plate feeder falls onto the upper part of the fine base material through the second multi-roller distributor, namely the mixture of the first layer of pellet and the base material; and then the matrix material and the pellet mixture in the composite sintering mixture on the first plate feeder roll down to the upper part of the mixture of the first layer of pellet and the matrix material through the first multi-roller distributor, namely the mixture of the second layer of pellet and the matrix material, and part of the matrix material in the composite sintering mixture on the first plate feeder falls down to the mixture of the second layer of pellet and the matrix material through the intervals among the round rollers of the first multi-roller distributor, namely the surface layer fine matrix material, so that the layered segregation distribution of the composite sintering mixture is completed.

In the invention, the three-way material distributor is of a pants-type structure and comprises a mixing bin at the upper part, a first channel and a second channel at the lower part, wherein a first discharge hole is formed at the tail end of the first channel, and a second discharge hole is formed at the tail end of the second channel. The upper part of the mixing bin is connected with a shuttle distributing device, the composite sintering mixture enters the shuttle distributing device from a discharge port of the secondary cylinder mixer through an adhesive tape machine, then enters the mixing bin of the three-way distributor, and then is respectively discharged into a first channel and a second channel from the mixing bin, and the first channel and the second channel respectively distribute the composite sintering mixture to a corresponding first plate-type ore feeder and a corresponding second plate-type ore feeder. According to the invention, the lower part of the three-way distributor is provided with the double channels and the double discharge ports for discharging, so that the problems of large material flow and high material flow speed in the traditional single-port discharging process are solved, and the problem that segregation distribution cannot be realized when the composite sintering mixture is continuously brought onto a sintering trolley from a multi-roller distributor (no matrix material or a very small amount of matrix material falls from the distance between the rollers) is avoided.

Preferably, the device further comprises a plate feeder, wherein the first plate feeder is arranged between the first discharge port of the three-way distributor and the first multi-roller distributor, and the second plate feeder is arranged between the second discharge port of the three-way distributor and the second multi-roller distributor. The plate feeder can accurately, continuously, efficiently and stably convey the composite sintering mixture to the multi-roller distributing device, compared with the round roller distributing device, the plate feeder can reduce the space distance, does not need to transform a system above a stock bin, and can not damage pellets in the composite sintering mixture (the round roller distributing device can crush the pellets easily). In addition, the plate feeder also has the advantages of convenient maintenance and repair and small maintenance workload.

Preferably, the device of the invention also comprises a multi-roller distributor. And a corresponding first multi-roller distributing device is arranged below the first plate feeder, and a corresponding second multi-roller distributing device is arranged below the second plate feeder. Wherein, the first multi-roller distributing device and the second multi-roller distributing device are arranged oppositely. Each multi-roller distributing device is composed of a group of a plurality of round rollers which are driven by a driving device (such as a gear) and rotate in the same direction. Wherein, the number of the round rollers is 2 to 20, preferably 5 to 15, and more preferably 8 to 12. The diameter of the round roller is 80-150mm, preferably 90-135mm, more preferably 100-120 mm. In the present invention, it is required that the multi-roll hopper is arranged obliquely with a small inclination angle (for example, 5 to 45 °, preferably 10 to 40 °, more preferably 15 to 30 °). It is also desirable that the roll spacing between adjacent round rolls be adjustable, typically the spacing between adjacent round rolls is 3-15mm, more preferably 5-10 mm. Furthermore, the speed of rotation of the individual rollers in the multi-roller distributor is relatively slow, typically in the range of 40 to 150r/min, preferably in the range of 60 to 120r/min, more preferably in the range of 80 to 100 r/min. Thereby, partial fine particles (namely matrix materials) can be leaked from the gap of the round roller, and meanwhile, the materials can be rolled on the round roller, so that the materials are loosened. Reasonable segregation along the granularity of the vertical direction of the material layer can be realized by adopting the material distributing device with two multi-roller in opposite directions, and the material layer structure from top to bottom is obtained: the fine matrix material in top layer, the mixture of second floor pellet and matrix material, the mixture of first floor pellet and matrix material, fine matrix material, the lower floor is the bed charge, so not only can improve the gas permeability on bed of material, the fuel has also obtained reasonable distribution moreover, it is many to form upper portion fuel, the bed of material structure that the lower part fuel is few, compound sintering mixture has also obtained reasonable distribution, the good heat accumulation ability and the high temperature environment of lower floor have been guaranteed simultaneously, thereby help the high-efficient convulsions sintering of compound sintering mixture.

The invention relates to a composite sintering mixture layered segregation distributing device which mainly comprises a shuttle distributing device, a three-way distributor, a plate feeder and a multi-roller distributing device. The shuttle distributing device and the upper mixing bin of the three-way material distributor form an even feeding system, the composite sintering mixture enters the upper mixing bin of the three-way material distributor under the action of gravity after entering the shuttle distributing device, then flows out from the first channel and the second channel at the lower part of the three-way material distributor and is respectively discharged to the corresponding first plate-type ore feeder and the corresponding second plate-type ore feeder. The composite sintering mixture on the first plate feeder is distributed through the corresponding first multi-roller distributing device, and the composite sintering mixture on the second plate feeder is distributed through the corresponding second multi-roller distributing device. Along the running direction of sintering platform truck, the top of sintering platform truck is equipped with in proper order and lays end feed bin, second multi-roll distributing device, first multi-roll distributing device and ignition furnace. A bottom paving bin firstly lays a layer of bottom paving materials on a sintering trolley; when the composite sintering mixture passes through the second multi-roller distributing device, due to the small material flow and the low material flow speed, part of the base materials in the materials can easily fall onto the bedding materials at the bottom of the sintering trolley through the roller spacing of the second multi-roller distributing device, namely a layer of fine base materials are paved on the bedding materials, and the base materials and the pellet mixture are uniformly paved on the upper portion of the fine base materials at the bottom through the second multi-roller distributing device, namely the paving of the mixture of the first layer of pellet and the base materials is completed. Because the first multi-roller distributing device and the second multi-roller distributing device move oppositely (are arranged oppositely), when the composite sintering mixture passes through the first multi-roller distributing device, the matrix material and the pellet mixture are uniformly distributed on the mixture of the first layer of pellets and the matrix material through the first multi-roller distributing device, namely the mixture of the second layer of pellets and the matrix material is obtained, and part of the matrix material falls on the mixture of the second layer of pellets and the matrix material through the roller spacing of the first multi-roller distributing device, namely falls on the top layer of a sintering trolley material layer, so that the laying of the fine matrix material on the surface layer is completed. Thereby realizing that the upper material layer is a fine particle matrix material, having high fuel content and being beneficial to sintering ignition; the middle and lower layers are the mixture of pellet and matrix material; a layer of fine matrix material is arranged on the upper part of the bedding material, so that the lower part is prevented from having too good air permeability, being difficult to maintain high-temperature roasting and being not beneficial to sintering; the reasonable segregation of the composite sintering mixture along the granularity in the vertical direction of the material bed is realized, and the process requirements are met.

By adopting the technical scheme of the invention, the two multi-roller distributing devices are arranged, and the backing material paving bin firstly paves a layer of backing material above the sintering trolley along the running direction of the sintering trolley. And then the fine particle materials on a second multi-roller distributing device in front of the sintering machine (according to the direction of a sintering machine trolley) form a layer of base materials with finer granularity above the backing materials through gaps between round rollers of the second multi-roller distributing device. The pellet material with larger granularity and part of the base material form a layer of mixture of pellet ore and the base material on the base material with smaller granularity through a second multi-roller distributor. Similarly, along the running direction of the sintering pallet, the pellet material with larger granularity and part of the base material form a layer of mixture of the pellet and the base material on the mixture of the pellet and the base material through the first multi-roller distributor. The fine particle materials on the first multi-roller distributing device form a layer of base material with fine granularity above the mixture of the pellet and the base material through the gap between the round rollers of the first multi-roller distributing device. Therefore, through the segregation distributing device, the materials in the sintering machine trolley are divided into 5 layers, and the materials are sequentially as follows from bottom to top: the base material-the base material with fine granularity-the mixture of the pellet and the base material-the base material with fine granularity.

If only a single multi-roller distributing device is adopted, a layer of bed charge can be firstly paved above the sintering machine trolley through a bottom paving bin, then a layer of mixture of pellet and matrix material is paved through the multi-roller distributing device, and the matrix material is formed through gaps between round rollers of the multi-roller distributing device. Namely, the materials which can only be arranged in the sintering pallet are divided into 3 layers, and the materials are sequentially arranged from bottom to top: bottom material-mixture of pellet and base material-base material with fine grain size.

The invention skillfully arranges two multi-roller distributing devices with opposite positions, the two multi-roller distributing devices with opposite positions form an inverted V-shaped structure, and simultaneously conveys materials to the two multi-roller distributing devices with opposite positions through the three-way distributor (1), so that 5 layers of mineral materials are formed on the sintering pallet. Moreover, the granularity of each layer of the 5 layers of materials is similar through two opposite multi-roller distributing devices. The bottom material of the first bottom layer is formed by the same bottom laying bin; the base material of the second layer is formed by dropping the material on the base material of the first layer through a gap between a plurality of round rollers of a second multi-roller distributing device; the mixture of the pellets and the matrix material on the third layer is formed by the material passing through the surface of the round roller on the second multi-roller distributing device and falling on the matrix material on the second layer from the tail end (the lowest end in the vertical position) of the second multi-roller distributing device; the mixture of the pellets and the matrix material on the fourth layer is formed by the material passing through the surface of the round roller on the first multi-roller distributing device and falling on the mixture of the pellets and the matrix material on the third layer from the tail end (the lowest end in the vertical position) of the first multi-roller distributing device; the base material of the fifth layer is formed by dropping the material on the mixture of the pellet and the base material of the fourth layer through the gap between the multiple round rollers of the first multi-roller distributor. That is, the sources of each layer of materials on the sintering pallet are the same, so that the uniformity of the materials in the horizontal direction of the sintering pallet (i.e. the running direction of the sintering pallet) is ensured. Through two multi-roller distributing devices for the material on the sintering machine trolley is from supreme down to be in proper order: the base material-the base material with fine granularity (fine granularity, high fuel content and strong heat storage capacity) -the mixture of the pellet and the base material (large granularity, low fuel content and good air permeability) -the base material with fine granularity (fine granularity, high fuel content and high ignition speed) realizes reasonable segregation distribution.

According to the sintering process, the distance between the material on the outermost layer of the sintering machine trolley and the ignition furnace is the closest, and the ignition furnace directly acts on the material on the outermost layer of the trolley, so that the fuel content in the material on the outermost layer of the sintering machine trolley is required to be relatively high; through the first multi-roller distributing device, materials with smaller granularity and high fuel content fall through the gaps between the round rollers of the first multi-roller distributing device to form surface-layer fine base materials, so that the ignition effect of an ignition furnace on sintering materials is facilitated, and the ignition sintering performance is ensured. The material in the middle of the sintering pallet is positioned in the middle of the material, the material is arranged at the upper part and the lower part, the air permeability is relatively poor, so the granularity of the material in the middle layer is relatively large, and the fuel content is low, the material passes through the complete circular roller surfaces of the first multi-roller distributor and the second multi-roller distributor and falls from the tail ends (the lowest ends in the vertical position) of the first multi-roller distributor and the second multi-roller distributor, namely the formed intermediate material has larger granularity (cannot fall from the gap between the circular rollers of the first multi-roller distributor and the second multi-roller distributor), the fuel content in the material is less, an intermediate material layer with larger granularity and less fuel content is formed, and the gap between the materials is in direct proportion to the granularity of the material due to the larger granularity of the material, so the gap between the intermediate material layers formed by the device is larger, the air permeability is good, so that the sintering effect of the intermediate material is ensured, and the problems of sintering and melting and material hardening caused by high fuel content and poor air permeability of the intermediate material layer are avoided. The sintering machine is carried out in a mode of exhausting air from the lower part of the trolley, and the sintering effect in the trolley of the sintering machine is required to be ensured, so that the full utilization of fuel in the material is improved, and the high-temperature environment of the material in the trolley of the sintering machine is required to be ensured.

Through the technical scheme of the invention, 5 layers of sintering materials with different grain sizes can be automatically formed on the sintering trolley, and the characteristics of the 5 layers of sintering materials are formed according to the specific environment and sintering requirements of the sintering process, so that automatic segregation material distribution is realized, and the sintering effect of the materials is improved.

In addition, the multi-roller distributing device is obliquely arranged, so that the multi-roller distributing device also has a screening function, and materials with smaller particle sizes form a fine base material layer on the lower layer of the trolley through the second multi-roller distributing device, so that the good heat storage capacity of the lower layer and the high-temperature environment in the whole trolley of the sintering machine are ensured, and the high-efficiency air draft sintering of composite sintering mixture is facilitated. The materials with larger particle sizes are distributed in the middle layer of the trolley through the screening of the second multi-roller distributing device and the first multi-roller distributing device, so that the air permeability of the middle material layer in the trolley of the sintering machine is ensured, and the occurrence of sintering blocking objects is avoided. The fine base material layer is formed on the top layer of the trolley by the screening of the first multi-roller distributing device, so that the ignition efficiency of the ignition furnace is improved, and the sintering performance and the sintering effect are ensured.

In the invention, the distributing speed of the first multi-roller distributing device and the second multi-roller distributing device is controlled by the plate feeder. The speed adjustment of a plate feeder below the first multi-roller distributor is controlled, so that the distribution speed of the first multi-roller distributor is controlled, and the thickness of a fine matrix material layer of a surface layer (a fifth layer) and the thickness of a mixed material layer of pellet and matrix material of a fourth layer are controlled. The speed adjustment of a plate feeder below the second multi-roller distributing device is controlled, so that the distributing speed of the second multi-roller distributing device is controlled, and the thickness of the fine base material layer on the fourth layer and the thickness of the mixed material layer of the pellets and the base material on the third layer are controlled. The back thickness of the bottom layer bottom material can be controlled through the discharging speed of the bottom paving bin. The layered segregation distributing device can realize the adaptive segregation distributing effect by adjusting the process conditions of related components according to the actual process requirements. Similarly, by adjusting the speed of the plate feeder, it is also possible to control the proportion (content) of the pellets in the fine matrix material layer of the surface layer (fifth layer) and to control the proportion (content) of the pellets in the fine matrix material layer of the fourth layer.

In the invention, the feeding speed of the plate feeder below the first multi-roller distributing device is adjusted by the first plate feeder adjuster. And the feeding speed of the plate feeder below the second multi-roller distributing device is adjusted through the second plate feeder adjuster.

In addition, the layered segregation distributing device can also adjust the particle sizes of materials in the fine matrix material layer and the mixed material layer of the pellet and the matrix material by adjusting the interval between the round rollers in the multi-roller distributing device. According to actual process needs, through the interval between the round rollers in the regulation multiple roller distributing device, if the sintering material is sintered fast in the whole sintering machine trolley, the interval between the round rollers in the multiple roller distributing device is enlarged, so that the average particle size of the base material layer at the bottom layer is enlarged, the gap between the materials is enlarged, the air permeability is enhanced, and the sintering speed is increased. On the contrary, if the sintering materials in the whole sintering machine trolley are required to be sintered at a low speed, the interval between the round rollers in the multi-roller distributing device is adjusted to be small, so that the average particle size of the base material layer at the bottom layer is reduced, the gaps among the materials are reduced, the air permeability is weakened, and the sintering speed is slowed down. Therefore, the practical applicability of the layered segregation distributing device is realized.

Similarly, by adjusting the interval between the round rollers in the multi-roller distributing device, the proportion (content) of the pellets in the fine matrix material layer of the surface layer (fifth layer) can be controlled, and the proportion (content) of the pellets in the fine matrix material layer of the fourth layer can be controlled. If the interval between the round rollers in the first multi-roller distributing device is increased, the proportion (content) of the pellet ore in the fine matrix material layer of the surface layer (the fifth layer) is increased; if the interval between the round rollers in the second multi-roller distributor is increased, the proportion (content) of the pellets in the fine matrix material layer of the fourth layer is increased. On the contrary, if the interval between the round rollers in the first multi-roller distributor is decreased, the occupation ratio (content) of the pellet ore in the fine matrix material layer of the surface layer (fifth layer) is decreased; if the interval between the round rollers in the second multi-roller distributor is decreased, the proportion (content) of the pellets in the fine matrix material layer of the fourth layer is decreased.

Meanwhile, the thickness of the surface layer and the bottom layer fine base material layer and the thickness of the third layer and the fourth layer mixed material layer of the pellet and the base material can be adjusted by adjusting the inclination angle of the multi-roller distributing device and/or the rotating speed of the round rollers on the multi-roller distributing device. The inclination angle of the first multi-roller distributing device is increased and/or the rotating speed of the round rollers on the multi-roller distributing device is increased, and the thickness of the fine base material layer of the surface layer (the fifth layer) and the thickness of the mixed material layer of the pellet and the base material of the fourth layer are reduced. On the contrary, the inclination angle of the first multi-roll distributor becomes smaller and/or the rotation speed of the upper round roll of the multi-roll distributor is slowed down, and the thickness of the fine matrix material layer of the surface layer (fifth layer) and the thickness of the mixed material layer of the pellet and the matrix material of the fourth layer are increased. In the same way, the inclination angle of the second multi-roller distributing device is increased and/or the rotating speed of the round rollers on the multi-roller distributing device is increased, and the thickness of the fine base material layer on the fourth layer and the thickness of the mixed material layer of the pellet and the base material on the third layer are reduced. On the contrary, the inclination angle of the second multi-roller distributing device is reduced and/or the rotating speed of the round roller on the multi-roller distributing device is reduced, and the thickness of the fine base material layer of the fourth layer and the thickness of the mixed material layer of the pellet and the base material of the third layer are increased.

Similarly, the proportion (content) of the pellets in the fine matrix material layer of the surface layer (fifth layer) and the proportion (content) of the pellets in the fine matrix material layer of the fourth layer can be controlled by adjusting the inclination angle of the multi-roller distributor and/or the rotating speed of the round rollers on the multi-roller distributor. If the inclination angle of the first multi-roller distributing device is increased and/or the rotating speed of the round rollers on the multi-roller distributing device is increased, the proportion (content) of the pellets in the fine matrix material layer of the surface layer (the fifth layer) is reduced; if the interval between the round rollers in the second multi-roller distributor is increased, the proportion (content) of the pellets in the fine matrix material layer of the fourth layer is decreased. On the contrary, if the inclination angle of the first multi-roller distributor becomes smaller and/or the rotation speed of the round rollers on the multi-roller distributor is slowed down, the proportion (content) of the pellets in the fine matrix material layer of the surface layer (fifth layer) is increased; if the inclination angle of the second multi-roller distributing device is reduced and/or the rotating speed of the round rollers on the multi-roller distributing device is reduced, the proportion (content) of the pellets in the fine base material layer of the fourth layer is increased.

In the invention, the interval between the round rollers in the first multi-roller distributor, the inclination angle of the first multi-roller distributor and the rotating speed of the round rollers in the first multi-roller distributor can be adjusted by the adjusting device of the first multi-roller distributor. The spacing between the round rollers in the second multi-roller distributing device, the inclination angle of the second multi-roller distributing device and the rotating speed of the round rollers in the second multi-roller distributing device can be adjusted through the second multi-roller distributing device adjusting device.

Preferably, in the technical solution of the present invention, a first material distribution device is further disposed at one side of the first plate feeder, near one end of the first multi-roller distributor. The first material distribution device is of a folding plate structure, and is provided with a plurality of or more than two feed openings. The folding curvature of the first material distribution device can be adjusted through the feed opening adjusting device, so that the caliber of each feed opening on the first material distribution device is adjusted, and the feed amount of each feed opening on the first material distribution device is adjusted. As shown in fig. 6, adjusting the feed opening adjusting device on the first material distribution device, so as to adjust the feed amount of the material conveyed to the first material distribution device by the first plate feeder from the two feed openings of the first material distribution device, so that the material on the first plate feeder falls onto the first multi-roller distributor through the two feed openings; avoid because a unloading point causes the material to pile up on the multiroll distributing device, under heavy load and wet material traction, thin material hardly drops through the roller interval, and the screening effect worsens, through further reposition of redundant personnel, can reduce the material thickness of multiroll distributing device top to reach the purpose of optimizing segregation cloth.

Similarly, in the technical scheme of the invention, a second material distribution device is further arranged at one end, close to the second multi-roller distributor, of one side of the second plate feeder. The second material distribution device is of a folding plate structure, and is provided with one or more than two feed openings. The folding curvature of the second material distribution device can be adjusted through the feed opening adjusting device, so that the caliber size of each feed opening on the second material distribution device is adjusted, and the feed amount of each feed opening on the second material distribution device is adjusted. Adjusting a feed opening adjusting device on the second material distribution device, so that the material conveyed to the second material distribution device by the second plate feeder is adjusted, and the feed amounts of the material from the two feed openings of the second material distribution device are respectively adjusted, so that the material on the second plate feeder falls onto the first multi-roller distributing device through the two feed openings; avoid because a unloading point causes the material to pile up on the multiroll distributing device, under heavy load and wet material traction, thin material hardly drops through the roller interval, and the screening effect worsens, through further reposition of redundant personnel, can reduce the material thickness of multiroll distributing device top to reach the purpose of optimizing segregation cloth.

In the present invention, the inclination angle of the multi-roller distributor refers to the angle between the axial direction (the direction along the arrangement of the round rollers) of the multi-roller distributor and the horizontal direction.

In the present invention, the height of the three-way distributor is 1 to 5 meters, preferably 1.5 to 4 meters, more preferably 2 to 3 meters.

In the present invention, the angle between the axial direction of the first channel of the three-way distributor and the vertical direction is 1 to 80 degrees, preferably 5 to 70 degrees, and more preferably 10 to 60 degrees.

In the present invention, the angle between the axial direction of the second channel of the three-way distributor and the vertical direction is 1 to 80 degrees, preferably 5 to 70 degrees, and more preferably 10 to 60 degrees.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention has integrated and developed a kind of compound sinter mixture stratifying segregation distributing gear, the apparatus adopts three-way tripper and two multi-roll distributing gears disposed oppositely and can realize the even distribution effectively, help the grain-grade segregation, get the reasonable material bed material structure, namely the bottom layer is the bedding foundation material, there are fine matrix materials on the bedding foundation material, there are first layer of pellet and mixture of matrix material on the fine matrix material, then the second layer of pellet and mixture of matrix material, the top layer is the fine matrix material of surface layer, thus realize the reasonable segregation of the vertical direction granularity of the material bed, improve the air permeability of the material bed;

2. the device is adopted for distributing, so that the fuel is reasonably distributed, a material layer structure with more fuel at the upper part and less fuel at the lower part is formed, the composite sintering mixture is also reasonably distributed, and the good heat storage capacity and high-temperature environment of the lower layer are ensured, thereby being beneficial to the efficient air draft sintering of the composite sintering mixture;

3. the device disclosed by the invention is used for distributing materials, so that part of fine particles in the composite sintering mixture can leak from gaps among the round rollers of the multi-roller distributor, and meanwhile, the materials can roll on the round rollers, so that the materials are loosened; and the material after the two multiroll distributing devices that are in opposite directions handle drops perpendicularly on the sintering platform truck, and the blanking of each point has the simultaneity during the cloth for mixture granularity segregation is reasonable, can eliminate the phenomenon that the cloth is uneven simultaneously, makes the charge level of sintering platform truck more level and more smooth.

Drawings

FIG. 1 is a schematic structural diagram of a composite sintering mixture layering segregation distributing device of the present invention;

FIG. 2 is a schematic structural diagram of a composite sintering mixture layered segregation distributing device according to the present invention in a use state;

FIG. 3 is a schematic structural diagram of a composite sintered mixture layered segregation distributing device provided with a plate feeder adjuster and a multi-roller distributor adjuster;

FIG. 4 is a schematic structural view of a composite sintered mixture layered segregation distributing device provided with a material distribution device according to the present invention;

FIG. 5 is a schematic view showing the adjustment of the apparatus for distributing a composite sintered mixture by segregation in layers according to the present invention;

FIG. 6 is a schematic diagram of the composite sintering mixture layered segregation distributing device with a material distributing device.

Reference numerals: 1: a three-way material distributor; 101: a mixing bin; 102: a first channel; 103: a second channel; 104: a first discharge port; 105: a second discharge port; 2: a multi-roll distributor; 201: a first multi-roller distributor; 202: a second multi-roller distributor; 203: a round roller; 3: a plate feeder; 301: a first plate feeder; 30101: a first plate feeder adjuster; 302: a second plate feeder; 30201: a second plate feeder adjuster; 4: a shuttle distributor; 5: a secondary drum mixer; 6: a tape machine; 7: sintering the trolley; 8: an ignition furnace; 9: paving a bottom stock bin; f1: a first multi-roller distributor adjusting device; f2: a second multi-roller distributor adjusting device; m1: a first material distribution device; m2: a second material dispensing device;

l1: paving a bottom material; l2: a fine matrix material; l3: a mixture of the first layer of pellets and the matrix material; l4: a mixture of the second layer of pellet and the matrix material; l5: and (3) surface fine matrix material.

Detailed Description

A composite sinter mixture layering segregation distributing device, the device includes: a three-way distributor 1 and a multi-roller distributor 2 arranged below the three-way distributor 1. The tee distributor 1 is of a pants-type structure, the upper space of the tee distributor 1 forms a mixing bin 101, the lower part of the mixing bin 101 is connected with two channels, namely a first channel 102 and a second channel 103, the tail end of the first channel 102 is provided with a first discharge hole 104, and the tail end of the second channel 103 is provided with a second discharge hole 105. The multi-roller distributor 2 comprises a first multi-roller distributor 201 and a second multi-roller distributor 202. A first multi-roller distributing device 201 is correspondingly arranged below the first discharging port 104, and a second multi-roller distributing device 202 is correspondingly arranged below the second discharging port 105.

Preferably, the first multi-roller distributing device 201 and the second multi-roller distributing device 202 are both obliquely arranged, and the first multi-roller distributing device 201 and the second multi-roller distributing device 202 are oppositely arranged in an inverted splayed shape.

In the present invention, the apparatus also includes a plate feeder 3. A first plate feeder 301 is arranged between the first discharge hole 104 and the first multi-roller distributor 201 of the three-way distributor 1, and a second plate feeder 302 is arranged between the second discharge hole 105 and the second multi-roller distributor 202.

Preferably, the apparatus further comprises a plate feeder adjuster; a first plate feeder adjuster 30101 is arranged on the first plate feeder 301, and a second plate feeder adjuster 30201 is arranged on the second plate feeder 302.

In the present invention, the device also comprises a shuttle distributor 4. The shuttle distributor 4 is arranged at the upper part of the mixing bunker 101 of the three-way distributor 1.

Preferably, the device further comprises a material distribution device; a first material distribution device M1 is arranged at one end of the first plate feeder 301 close to the first multi-roller distributing device 201, and a second material distribution device M2 is arranged at one end of the second plate feeder 302 close to the second multi-roller distributing device 202; the first material distribution device M1 is arranged at the discharging side of the first multi-roller distributor 201, and the second material distribution device M2 is arranged at the discharging side of the second multi-roller distributor 202; the first material distribution device M1 and the second material distribution device M2 are each provided with two or more feed openings in the traveling direction of the sintering pallet.

Preferably, the apparatus further comprises a secondary drum mixer 5. The discharge port of the secondary cylinder mixer 5 is connected with the shuttle distributor 4. Preferably, a belt conveyor 6 is further arranged at the lower part of the discharge port of the secondary cylinder mixer 5, and the composite sintering mixture in the secondary cylinder mixer 5 is conveyed into the shuttle distributor 4 through the belt conveyor 6.

In the present invention, the apparatus further comprises a sintering trolley 7 disposed below the multi-roll distributor 2. Preferably, an ignition furnace 8 and a bottoming bin 9 are further arranged above the sintering trolley 7. Along the running direction of the sintering trolley 7, a bottom paving bin 9, a second multi-roller distributing device 202, a first multi-roller distributing device 201 and an ignition furnace 8 are sequentially arranged above the sintering trolley 7. In the invention, the multi-roller distributor 2 is composed of a plurality of round rollers 203, and the centers of the rollers of the round rollers 203 are arranged in a straight line. Preferably, the number of the round rollers 203 in the multi-roller distributor 2 is 2 to 20, preferably 5 to 15, more preferably 8 to 12.

Preferably, the plurality of round rollers 203 are driven by a driving device, and the plurality of round rollers 203 rotate in the same direction. Preferably, the driving means is a gear.

Preferably, the adjacent round rollers 203 have a spacing therebetween, preferably the spacing is 3 to 15mm, and more preferably the spacing is 5 to 10 mm.

Preferably, a first multi-roller distributing device adjusting device F1 is arranged on the first multi-roller distributing device 201; a second multi-roller distributing device adjusting device F2 is arranged on the second multi-roller distributing device 202.

Preferably, the diameter of the round roller 203 is 80 to 150mm, preferably 90 to 135mm, more preferably 100 to 120 mm.

In the present invention, the inclination angle of the multiple roller distributor 2 is 5 to 45 °, preferably 10 to 40 °, more preferably 15 to 30 °.

Preferably, the rotational speed of each of said round rollers 203 in the multi-roller distributor 2 is 40-150r/min, preferably 60-120r/min, more preferably 80-100 r/min.

1) the composite sintering mixture is discharged from a discharge port of the secondary cylinder mixer 5 to the adhesive tape machine 6, and the composite sintering mixture on the adhesive tape machine 6 is uniformly distributed into a mixing bin 101 at the upper part of the three-way distributor 1 through a shuttle distributor 4;

2) the composite sintering mixture in the mixing bunker 101 is divided to enter a first channel 102 and a second channel 103 of the three-way distributor 1, the composite sintering mixture in the first channel 102 is discharged to a first plate-type ore feeder 301 through a first discharge port 104, the composite sintering mixture in the second channel 103 is discharged to a second plate-type ore feeder 302 through a second discharge port 105, and the first plate-type ore feeder 301 and the second plate-type ore feeder 302 respectively convey the composite sintering mixture to a corresponding first multi-roller distributing device 201 and a corresponding second multi-roller distributing device 202;

3) with the operation of the sintering trolley 7, the bottom paving bin 9 firstly paves a layer of bottom paving materials L1 on the sintering trolley 7; then, part of the matrix material in the composite sintering mixture on the second plate feeder 302 falls onto the bedding material L1 through the gaps between the round rollers 203 of the second multi-roller distributor 202, that is, a layer of fine matrix material L2 is laid on the bedding material L1, and the matrix material and pellet mixture in the composite sintering mixture on the second plate feeder 302 falls onto the upper part of the fine matrix material L2 through the second multi-roller distributor 202, that is, the mixture of the first layer of pellet and matrix material L3; then the matrix material and the pellet mixture in the composite sintering mixture on the first plate feeder 301 rolls down to the upper part of the mixture L3 of the first layer of pellet and the matrix material through the first multi-roller distributor 201, which is the mixture L4 of the second layer of pellet and the matrix material, and part of the matrix material in the composite sintering mixture on the first plate feeder 301 falls down to the mixture L4 of the second layer of pellet and the matrix material through the gaps between the round rollers 203 of the first multi-roller distributor 201, which is the surface layer fine matrix material L5, thereby completing the layered segregation distribution of the composite sintering mixture.

Example 1

As shown in fig. 1, a composite sintered mixture material distributing device by layer segregation includes: a three-way distributor 1 and a multi-roller distributor 2 arranged below the three-way distributor 1. The tee distributor 1 is of a pants-type structure, the upper space of the tee distributor 1 forms a mixing bin 101, the lower part of the mixing bin 101 is connected with two channels, namely a first channel 102 and a second channel 103, the tail end of the first channel 102 is provided with a first discharge hole 104, and the tail end of the second channel 103 is provided with a second discharge hole 105. The multi-roller distributor 2 comprises a first multi-roller distributor 201 and a second multi-roller distributor 202. A first multi-roller distributing device 201 is correspondingly arranged below the first discharging port 104, and a second multi-roller distributing device 202 is correspondingly arranged below the second discharging port 105.

Example 2

Embodiment 1 is repeated except that the first multi-roller distributing device 201 and the second multi-roller distributing device 202 are obliquely arranged, and the first multi-roller distributing device 201 and the second multi-roller distributing device 202 are oppositely arranged in an inverted splayed shape.

Example 3

Example 2 is repeated except that the apparatus also includes a slat feeder 3. A first plate feeder 301 is arranged between the first discharge hole 104 and the first multi-roller distributor 201 of the three-way distributor 1, and a second plate feeder 302 is arranged between the second discharge hole 105 and the second multi-roller distributor 202.

Example 4

Example 3 is repeated except that the apparatus further comprises a sintering trolley 7 arranged below the multi-roll distributor 2. An ignition furnace 8 and a bottom laying bin 9 are also arranged above the sintering trolley 7. Along the running direction of the sintering trolley 7, a bottom paving bin 9, a second multi-roller distributing device 202, a first multi-roller distributing device 201 and an ignition furnace 8 are sequentially arranged above the sintering trolley 7. The multi-roller distributing device 2 is composed of 9 round rollers 203, and the centers of the rollers of the 9 round rollers 203 are arranged in a straight line. The number of the round rollers 203 in the multi-roller distributor 2 is 9. The 9 round rollers 203 are all driven by gears, and the round rollers 203 rotate in the same direction.

The 9 round rollers 203 were spaced apart from each other by 10 mm. The diameter of the round roller 203 is 120 mm. The inclination angle of the multi-roller distributor 2 is 30 degrees. The rotational speed of each round roller 203 in the multi-roller distributor 2 is 100 r/min.

Example 5

Example 4 is repeated except that the device further comprises a shuttle distributor 4. The shuttle distributor 4 is arranged at the upper part of the mixing bunker 101 of the three-way distributor 1. The apparatus also includes a secondary drum mixer 5. The discharge port of the secondary cylinder mixer 5 is connected with the shuttle distributor 4. The lower part of the discharge port of the secondary cylinder mixer 5 is also provided with a belt conveyor 6, and the composite sintering mixture in the secondary cylinder mixer 5 is conveyed into the shuttle distributor 4 through the belt conveyor 6.

Example 6

Example 5 was repeated except that the number of the round rollers 203 in the multi-roller hopper 2 was 5. The interval between the adjacent round rollers 203 was 15 mm.

Example 7

Example 5 was repeated except that the angle of inclination of the multiple roller distributor 2 was 15 °.

Example 8

Example 5 was repeated, except that the rotational speed of each of the round rollers 203 in the multi-roller hopper 2 was 80 r/min.

Example 9

Example 5 was repeated except that the apparatus further included a material dispensing means; a first material distribution device M1 is arranged at one end of the first plate feeder 301 close to the first multi-roller distributing device 201, and a second material distribution device M2 is arranged at one end of the second plate feeder 302 close to the second multi-roller distributing device 202; the first material distribution device M1 is arranged at the discharging side of the first multi-roller distributor 201, and the second material distribution device M2 is arranged at the discharging side of the second multi-roller distributor 202; the first material distribution device M1 and the second material distribution device M2 are both provided with two feed openings in the traveling direction of the sintering machine trolley.

Example 10

Example 9 was repeated except that the first material distribution device and the second material distribution device were each provided with a feed opening adjustment device. The feed opening adjusting device adjusts the caliber sizes of the two feed openings on the first material distribution device, so that the feed amount of each feed opening on the first material distribution device is adjusted. The feed opening adjusting device adjusts the calibers of the two feed openings on the second material distribution device, so that the feed amount of each feed opening on the second material distribution device is adjusted.

Example 11

Example 5 is repeated except that the apparatus further includes a slat feeder adjuster; a first plate feeder adjuster 30101 is arranged on the first plate feeder 301, and a second plate feeder adjuster 30201 is arranged on the second plate feeder 302. A first multi-roller distributing device adjusting device F1 is arranged on the first multi-roller distributing device 201; a second multi-roller distributing device adjusting device F2 is arranged on the second multi-roller distributing device 202.

Example 12

A method for distributing a composite sinter mixture by segregation into layers by using the device in example 5, which comprises the following steps:

3) with the operation of the sintering trolley 7, the bottom paving bin 9 firstly paves a layer of bottom paving materials L1 on the sintering trolley 7; then, part of the matrix material in the composite sintering mixture on the second plate feeder 302 falls onto the bedding material L1 through the gaps between the round rollers 203 of the second multi-roller distributor 202, that is, a layer of fine matrix material L2 is laid on the bedding material L1, and the matrix material and pellet mixture in the composite sintering mixture on the second plate feeder 302 falls onto the upper part of the fine matrix material L2 through the second multi-roller distributor 202, that is, the mixture of the first layer of pellet and matrix material L3; subsequently, the matrix material and the pellet mixture in the composite sintering mixture on the first plate feeder 301 are rolled down to the upper part of the mixture L3 of the first layer of pellet and the matrix material through the first multi-roller distributor 201, which is the mixture L4 of the second layer of pellet and the matrix material, and part of the matrix material in the composite sintering mixture on the first plate feeder 301 is dropped down to the mixture L4 of the second layer of pellet and the matrix material through the gaps between the round rollers 203 of the first multi-roller distributor 201, which is the surface layer fine matrix material L5, so as to complete the layered segregation distribution of the composite sintering mixture, as shown in fig. 2.

The conventional material distribution device is adopted to distribute the composite sintering mixture, and the obtained material layer structure is as follows: the amounts of the upper, middle and lower pellets are respectively 5-15%, 15-25% and 65-75%.

The material distribution of the composite sintering mixture is carried out by adopting the device of the embodiment, and as shown in the segregation scheme 1-3 in the table 1, the obtained material layer structure is as follows: the first layer is a bedding material, the second layer is a fine matrix material, the third layer is a mixture of pellet and the matrix material, the fourth layer is a mixture of pellet and the matrix material, and the fifth layer is a surface fine matrix material. The top layer (i.e., the fifth layer) and the bottom layer (including the first layer and the second layer) are almost free from the distribution of the nodules in the entire layer structure.

By adopting the technical scheme of the invention, the bottom layer laid bottom material is formed by the bottom laying bin. The thickness of the fourth layer and the fifth layer is adjusted through an adjusting plate type ore feeder below the first multi-roller distributor, a gap between round rollers in the first multi-roller distributor, the inclination angle of the first multi-roller distributor and the rotating speed of the round rollers in the first multi-roller distributor; the ratio of the pellets in the fourth layer to the pellets in the fifth layer is realized through the gap among the round rollers in the first multi-roller distributing device, the inclination angle of the first multi-roller distributing device and the rotating speed of the round rollers in the first multi-roller distributing device. Similarly, the thickness of the second layer and the third layer is adjusted through an adjusting plate feeder below the second multi-roller distributing device, a gap between round rollers in the second multi-roller distributing device, the inclination angle of the second multi-roller distributing device and the rotating speed of the round rollers in the second multi-roller distributing device; the ratio of the pellets in the second layer to the pellets in the third layer is realized through the gap between the round rollers in the first multi-roller distributing device, the inclination angle of the first multi-roller distributing device and the rotating speed of the round rollers in the first multi-roller distributing device. The materials of the sintering pallet of the following experiment were of the same thickness, and the materials of each layer were of the same thickness.

TABLE 1 distribution of pellet material in each layer in different segregation schemes

TABLE 2 Effect of different segregation schemes on the composite agglomeration index

Note: the first layer is the bottom layer and the fifth layer is the surface layer.

As can be seen from tables 1 and 2, the composite agglomeration indexes obtained by the segregation schemes 1 to 3 are relatively optimal. That is, when the pellet material is not distributed on the surface layer or the bottom layer or a small amount of pellet material is distributed on the surface layer or the bottom layer, excellent agglomeration indexes can be obtained. By adopting the technology of the invention, the purpose that the surface layer and the bottom layer have little or no pellet materials can be well realized. The upper material layer is a fine particle matrix material, so that the fuel content is high, and sintering ignition is facilitated; the middle and lower layers are the mixture of pellet and matrix material; a layer of fine matrix material is arranged on the upper part of the bedding material, so that the lower part is prevented from having too good air permeability, being difficult to maintain high-temperature roasting and being not beneficial to sintering; the reasonable segregation of the composite sintering mixture along the granularity in the vertical direction of the material bed is realized, and the process requirements are met.

Claims

1. A composite sinter mixture layering segregation distributing device, the device includes: a three-way distributor (1) and a multi-roller distributor (2) arranged below the three-way distributor (1); the three-way distributor (1) is of a pants-type structure, the upper space of the three-way distributor (1) forms a mixing bin (101), the lower part of the mixing bin (101) is connected with two channels which are respectively a first channel (102) and a second channel (103), the tail end of the first channel (102) is provided with a first discharge hole (104), and the tail end of the second channel (103) is provided with a second discharge hole (105); the multi-roller distributing device (2) comprises a first multi-roller distributing device (201) and a second multi-roller distributing device (202); a first multi-roller distributing device (201) is correspondingly arranged below the first discharging port (104), and a second multi-roller distributing device (202) is correspondingly arranged below the second discharging port (105).

2. The apparatus of claim 1, wherein: the first multi-roller distributing device (201) and the second multi-roller distributing device (202) are obliquely arranged, and the first multi-roller distributing device (201) and the second multi-roller distributing device (202) are oppositely arranged in an inverted splayed shape.

3. The apparatus of claim 1 or 2, wherein: the device also comprises a plate feeder (3); a first plate feeder (301) is arranged between a first discharge port (104) of the three-way distributor (1) and the first multi-roller distributor (201), and a second plate feeder (302) is arranged between a second discharge port (105) and the second multi-roller distributor (202);

preferably, the apparatus further comprises a plate feeder adjuster; a first plate feeder adjuster (30101) is arranged on the first plate feeder (301), and a second plate feeder adjuster (30201) is arranged on the second plate feeder (302).

4. The apparatus of claim 3, wherein: the device also comprises a shuttle distributor (4); the shuttle distributor (4) is arranged at the upper part of the mixing bin (101) of the three-way distributor (1); and/or

The device also comprises a material distribution device; a first material distribution device (M1) is arranged at one end of the first plate feeder (301) close to the first multi-roller distributor (201), and a second material distribution device (M2) is arranged at one end of the second plate feeder (302) close to the second multi-roller distributor (202); the first material distribution device (M1) is arranged at the discharging side of the first multi-roller distributor (201), and the second material distribution device (M2) is arranged at the discharging side of the second multi-roller distributor (202); the first material distribution device (M1) and the second material distribution device (M2) are both provided with two or more than two feed openings in the running direction of the sintering pallet.

5. The apparatus of claim 4, wherein: the apparatus also comprises a secondary drum mixer (5); the discharge port of the secondary cylinder mixer (5) is connected with the shuttle distributing device (4); preferably, a belt conveyor (6) is further arranged at the lower part of the discharge port of the secondary cylinder mixer (5), and the composite sintering mixture in the secondary cylinder mixer (5) is conveyed into the shuttle distributor (4) through the belt conveyor (6).

6. The apparatus of any one of claims 1-5, wherein: the device also comprises a sintering trolley (7) arranged below the multi-roller distributing device (2); preferably, an ignition furnace (8) and a bottom laying bin (9) are also arranged above the sintering trolley (7); along the running direction of the sintering trolley (7), a bottom laying bin (9), a second multi-roller distributor (202), a first multi-roller distributor (201) and an ignition furnace (8) are sequentially arranged above the sintering trolley (7).

7. The apparatus of any one of claims 1-6, wherein: the multi-roller distributing device (2) is composed of a plurality of round rollers (203), and the centers of the rollers of the round rollers (203) are arranged into a straight line; preferably, the number of the round rollers (203) in the multi-roller distributor (2) is 2-20, preferably 5-15, more preferably 8-12;

preferably, the plurality of round rollers (203) are all driven by a driving device, and the plurality of round rollers (203) rotate in the same direction; preferably, the driving means is a gear.

8. The apparatus of claim 7, wherein: the adjacent round rollers (203) are spaced, and the spacing can be adjusted according to the segregation requirement of the material layer structure, preferably the spacing is 3-15mm, and more preferably the spacing is 5-10 mm; preferably, a first multi-roller distributing device adjusting device (F1) is arranged on the first multi-roller distributing device (201); a second multi-roller distributing device adjusting device (F2) is arranged on the second multi-roller distributing device (202); and/or

The diameter of the round roller (203) is 80-150mm, preferably 90-135mm, more preferably 100-120 mm.

9. The apparatus of claim 8, wherein: the inclination angle of the multi-roller distributor (2) is 5-45 degrees, preferably 10-40 degrees, and more preferably 15-30 degrees; and/or

The rotating speed of each round roller (203) in the multi-roller distributing device (2) is 40-150r/min, preferably 60-120r/min, and more preferably 80-100 r/min.

10. A method of stratified segregation distributing a composite sinter mix or using the apparatus of any one of claims 1 to 9, comprising the steps of:

1) the composite sintering mixture is discharged onto an adhesive tape machine (6) from a discharge port of a secondary cylinder mixer (5), and the composite sintering mixture on the adhesive tape machine (6) is uniformly distributed into a mixing bin (101) at the upper part of a three-way distributor (1) through a shuttle distributor (4);

2) the composite sintering mixture in the mixing bunker (101) enters a first channel (102) and a second channel (103) of a three-way distributor (1) in a shunting manner, the composite sintering mixture in the first channel (102) is discharged to a first plate-type ore feeder (301) through a first discharge hole (104), the composite sintering mixture in the second channel (103) is discharged to a second plate-type ore feeder (302) through a second discharge hole (105), and the first plate-type ore feeder (301) and the second plate-type ore feeder (302) respectively convey the composite sintering mixture to a corresponding first multi-roller distributing device (201) and a corresponding second multi-roller distributing device (202);

3) along the running direction of the sintering trolley (7), a bottom paving bin (9) firstly paves a layer of bottom paving materials (L1) on the sintering trolley (7); then, part of the base materials in the composite sintering mixture on the second plate feeder (302) fall onto the bedding material (L1) through the intervals between the round rollers (203) of the second multi-roller distributor (202), namely, a layer of fine base materials (L2) is paved on the bedding material (L1), and the base materials and the pellet mixture in the composite sintering mixture on the second plate feeder (302) fall onto the upper part of the fine base materials (L2) through the second multi-roller distributor (202), namely, the mixture (L3) of the first layer of pellet and the base materials is obtained; then the matrix material and the pellet mixture in the composite sintering mixture on the first plate feeder (301) roll down to the upper part of the mixture (L3) of the first layer of pellet and the matrix material through the first multi-roller distributor (201), namely the mixture (L4) of the second layer of pellet and the matrix material, and part of the matrix material in the composite sintering mixture on the first plate feeder (301) falls down to the mixture (L4) of the second layer of pellet and the matrix material through the intervals between the round rollers (203) of the first multi-roller distributor (201), namely the surface layer fine matrix material (L5), thereby completing the layered segregation distribution of the composite sintering mixture.