CN113000361B

CN113000361B - Mixed screening method and device for sinter

Info

Publication number: CN113000361B
Application number: CN202110184384.7A
Authority: CN
Inventors: 刘哲明; 宁江波; 刘相佩; 邓学求; 贾胜芳; 郭清
Original assignee: Zhongye Changtian International Engineering Co Ltd
Current assignee: Zhongye Changtian International Engineering Co Ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2022-08-16
Anticipated expiration: 2041-02-08
Also published as: CN113000361A

Abstract

The application provides a method and a device for mixed screening of sinter, wherein the device comprises a mixing component and a mixing cylinder; the mixing component is arranged inside the mixing barrel; the mixing cylinder comprises a first sub-cylinder, a vibrating screening cylinder and a second sub-cylinder which are connected in sequence; the upper end of one side of the first branch barrel, which is far away from the vibration screening barrel, is provided with a first feeding hole; the lower end of the vibration screening cylinder is provided with a screen 24; the upper end of the vibration screening cylinder is provided with a vibration component 25; the upper end of one side, close to the vibrating screening cylinder, of the second sub-cylinder is provided with a second feeding hole; and a discharge hole is formed in one side, far away from the vibration screening cylinder, of the second sub-cylinder. The embodiment of the application screens the material and obtains the small granule material and large granule material. The carbon powder content of the small particle materials is high, and the air permeability of the large particle materials is strong. In the subsequent utilization process, the large-particle materials are laid on the sintering trolley, and the small-particle materials are laid on the upper layer of the large-particle materials, so that the sintering efficiency is finally improved.

Description

Mixed screening method and device for sinter

Technical Field

The application relates to a sinter technology, in particular to a sinter mixing and screening method and a sinter mixing and screening device.

Background

In the related art, a mixture of iron ore, limestone and coke is used as a raw material of a sintered ore. In the sintering process, the mixture is tiled on a sintering trolley, and because a fan draws air downwards after the sintering machine is ignited from the top, the heat stored in a material layer is concentrated at the middle lower part during sintering, so that the heat at the upper part of the material layer of the mixture is relatively low, the temperature of the material layer is low, the material layer at the upper part is low, the mixture is not fully sintered or is crystallized quickly and easily crushed, partial raw materials can be generated, and the ore return rate is increased; and the lower part is easy to form excessive heat due to overhigh temperature, so that the problems of excessive melting, blockage of an air channel, poor air permeability and the like occur.

Therefore, how to improve the air permeability and the sintering efficiency in the sintering process becomes a problem to be solved urgently by those skilled in the art.

Disclosure of Invention

The application provides a method and a device for mixed screening of sinter, which are used for avoiding the problems of insufficient sintering and excessive melting in the sintering process.

According to a first aspect of embodiments of the present application, there is provided a sinter mix screening device comprising a mixing element and a mixing drum; the mixing component is arranged inside the mixing barrel;

the mixing cylinder comprises a first sub-cylinder, a vibrating screening cylinder and a second sub-cylinder which are connected in sequence;

a first feeding hole is formed in the upper end of one side, far away from the vibration screening cylinder, of the first sub-cylinder; the lower end of the vibration screening cylinder is provided with a screen; the upper end of the vibration screening cylinder is provided with a vibration component; a second feeding hole is formed in the upper end of one side, close to the vibrating screening cylinder, of the second sub-cylinder; a discharge hole is formed in one side, far away from the vibration screening cylinder, of the second sub-cylinder;

the mixing component comprises a rotating shaft and a plurality of plowshares; the plowshare is arranged on the rotating shaft, so that materials entering the mixing barrel move along the arrangement direction of the first sub-barrel, the vibration screening barrel and the second sub-barrel.

In some embodiments, the plowshare comprises a forward pushing plowshare and a backward pushing plowshare, and the forward pushing plowshare and the backward pushing plowshare are arranged on the rotating shaft at intervals.

In some embodiments, the first cartridge includes a first cartridge body and a first locking lug disposed on an outer wall of the first cartridge body on a side thereof adjacent to the vibratory screening cartridge;

the vibrating screening cylinder comprises a vibrating screening cylinder body, a second locking lug and a third locking lug, wherein the second locking lug is arranged on the outer wall of the vibrating screening cylinder body, which is close to one side of the first screening cylinder; the third locking lug is arranged on the outer wall of the vibrating screening cylinder body, which is close to one side of the second cylinder;

the second cylinder body comprises a first cylinder body and a first locking lug, and the first locking lug is arranged on the outer wall of one side, close to the vibrating screening cylinder, of the first cylinder body;

the first lock lug and the second lock lug are connected through a bolt, and the third lock lug and the fourth lock lug are connected through a bolt.

In some embodiments, the number of the first locking lug, the second locking lug, the third locking lug and the fourth locking lug is four.

In some embodiments, a rubber ring is disposed between the first distributor cylinder body and the vibratory screening cylinder body; and a rubber ring is arranged between the second sub-cylinder body and the vibration screening cylinder body.

In some embodiments, the vibratory screening cartridge body is circular in shape and the screen mesh corresponds to a central angle of 90 °.

In some embodiments, the screen is provided with screening holes, and the aperture of the screening holes is 0.01 mm.

In some embodiments, the vibrating member vibrates at a frequency of 10Hz and an amplitude of 5 mm.

In some embodiments, the lower end of the second sub-cylinder is provided with a high-pressure air injection device, and a nozzle of the high-pressure air injection device is aligned with the screen.

In a second aspect, there is provided a sinter mix screening method for use on a sinter mix screening device, the method comprising:

putting the ground iron ore, coke and limestone into a first sub-barrel through a first feeding hole as first materials; the rotating shaft continuously rotates, and the first material is mixed and moves towards the direction of the vibrating screening drum by utilizing the plowshare arranged on the rotating shaft;

when the first material moves to the vibrating screening drum, discharging the first material with the diameter smaller than the preset value through the screen; after the first material directly smaller than the preset value is discharged, the rest material is conveyed into the second branch cylinder by the plowshare;

a second material is put into the second branch cylinder through a second feeding hole, wherein the second material comprises the ground iron ore and limestone; and the residual material and the second material are continuously mixed and conveyed to a discharge port to be discharged.

As can be seen from the above technologies, the present application provides a method and an apparatus for mixed screening of sintered ore, where the apparatus includes a mixing component and a mixing drum; the mixing component is arranged inside the mixing barrel; the mixing cylinder comprises a first sub-cylinder, a vibrating screening cylinder and a second sub-cylinder which are connected in sequence; the upper end of one side of the first branch barrel, which is far away from the vibration screening barrel, is provided with a first feeding hole; the lower end of the vibration screening cylinder is provided with a screen; the upper end of the vibration screening cylinder is provided with a vibration component; the upper end of one side, close to the vibrating screening cylinder, of the second sub-cylinder is provided with a second feeding hole; and a discharge hole is formed in one side, far away from the vibration screening cylinder, of the second sub-cylinder. The embodiment of the application screens the material and obtains the small granule material and large granule material. The carbon powder content of the small particle materials is high, and the air permeability of the large particle materials is strong. In the subsequent utilization process, the large-particle materials are laid on the sintering trolley, and the small-particle materials are laid on the upper layer of the large-particle materials, so that the sintering efficiency is finally improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise. Furthermore, these descriptions should not be construed as limiting the embodiments, wherein elements having the same reference number designation are identified as similar elements throughout the figures, and the drawings are not to scale unless otherwise specified.

FIG. 1 is a schematic illustration of a sinter mix screening device according to an exemplary embodiment of the present application;

FIG. 2 is a schematic structural view of a first sub-cartridge shown in accordance with an exemplary embodiment of the present application;

FIG. 3 is a schematic illustration of a vibratory screening cartridge shown in accordance with an exemplary embodiment of the present application;

fig. 4 is a schematic structural diagram of a second sub-cartridge shown in accordance with an exemplary embodiment of the present application.

Illustration of the drawings: 100-mixing part, 200-mixing barrel, 1-first separating barrel, 11-first separating barrel body, 12-first locking lug, 13-first feeding hole, 2-vibration screening barrel, 21-vibration screening barrel body, 22-second locking lug, 23-third locking lug, 24-screen, 25-vibration part, 3-second separating barrel, 31-second separating barrel body, 32-fourth locking lug, 33-second feeding hole, 34-discharging hole, 4-rotating shaft, 5-plough head, 6-rubber ring and 7-high pressure air injection device.

Detailed Description

In order to solve the above technical problem, the present embodiment provides a sinter mixing and screening device, as shown in fig. 1, including a mixing part 100 and a mixing cylinder 200. The mixing component 100 is arranged inside the mixing cylinder 200, and the mixing component 100 can mix materials put into the mixing cylinder 200 and drive the materials to move according to the embodiment of the application.

In some embodiments, the mixing drum 200 is a unitary structure. In other embodiments, the mixing cylinder 200 may not be an integrally formed structure, and the mixing cylinder 200 includes a first sub-cylinder 1, a vibrating screen sub-cylinder 2 and a second sub-cylinder 3 which are connected in sequence.

It should be noted that the connection of the first sub-cylinder 1, the vibrating sieving cylinder 2 and the second sub-cylinder 3 can adopt various structures. In some embodiments, as shown in fig. 2, the first barrel 1 includes a first barrel body 11 and a first lock lug 12, and the first lock lug 12 is disposed on an outer wall of the first barrel body 11 on a side close to the vibrating screen barrel 2; as shown in fig. 3, the vibrating screen cylinder 2 includes a vibrating screen cylinder body 21, a second locking lug 22 and a third locking lug 23, the second locking lug 22 is disposed on the outer wall of the vibrating screen cylinder body 21 on the side close to the first cylinder 1; the third locking lug 23 is arranged on the outer wall of the vibrating screening drum body 21 on one side close to the second sub-drum 3; the second sub-barrel 3 comprises a second sub-barrel body 31 and a fourth locking lug 32, and the fourth locking lug 32 is arranged on the outer wall of the second sub-barrel body 31 on the side close to the vibrating screen sub-barrel 2; the first lock lug 12 and the second lock lug 22 are connected by a bolt, and the third lock lug 23 and the fourth lock lug 32 are connected by a bolt. The embodiment of the application can connect the first sub-cylinder 1, the vibrating screen sub-cylinder 2 and the second sub-cylinder 3 together through the lock lugs and the bolt structures.

In the embodiment of the present application, the diameters of the first cylinder body 11, the vibrating sieving cylinder body 21 and the second cylinder body 31 are the same, and the central axes are on a straight line. The first and

second lock ears

12 and 22 are the same in size and number, and the third and

fourth lock ears

23 and 32 are the same in size and number. The lock lug and the barrel body in the embodiment of the application can be connected in a welding mode.

In the size scope of first branch section of thick bamboo body 11, a vibration screening branch section of thick bamboo body 21 and second branch section of thick bamboo body 31, can be as many as possible set up the lock ear, can strengthen the fastness that the three connects like this.

In some embodiments, the number of the first locking lug 12, the second locking lug 22, the third locking lug 23 and the fourth locking lug 32 is four. The four first lock lugs 12 are uniformly distributed on the outer wall of the first cylinder body 11 on the side close to the vibrating screening cylinder 2. The four second lock lugs 22 are uniformly distributed on the outer wall of the vibrating screen cylinder body 21 on the side close to the first cylinder 1. The four third locking lugs 23 are uniformly distributed on the outer wall of the vibrating screening barrel body 21 on the side close to the second sub-barrel 3. The four fourth locking lugs 32 are uniformly distributed on the outer wall of the second cylinder body 31 on the side close to the vibrating screening cylinder 2.

In some embodiments, a first feeding hole 13 is formed at an upper end of a side of the first cylinder 1 far away from the vibrating screen cylinder 2. The embodiment of the present application can convey the raw material for preparing the sinter into the first barrel 1 through the first feed inlet 13, wherein the raw material for the sinter can be coke, limestone and iron ore after grinding.

The mixing part 100 comprises a rotating shaft 4 and a plurality of plowshares 5; the plowshare 5 is arranged on the rotating shaft 4, so that the materials entering the mixing barrel 200 move along the arrangement direction of the first separating barrel 1, the vibrating screening barrel 2 and the second separating barrel 3. In the embodiment of the present application, the setting angle of the plowshare 5 is not limited as long as the plowshare can mix materials, can push the materials to move along the directions of the first separating cylinder 1, the vibrating screening separating cylinder 2 and the second separating cylinder 3, and can control the advancing speed.

In some embodiments, the plow head 5 comprises a forward pushing plow head and a backward pushing plow head, and the forward pushing plow head and the backward pushing plow head are arranged on the rotating shaft 4 at intervals. Illustratively, the plowshare 5 on the rotating shaft 4 comprises a forward pushing plowshare, a backward pushing plowshare, a forward pushing plowshare and a backward pushing plowshare … which are arranged in sequence.

The lower end of the vibration screening cylinder 2 is provided with a screen 24; the upper end of the vibrating screening cylinder 2 is provided with a vibrating component 25. The vibrating member 25 may continuously vibrate the vibrating screen cylinder 2, and when the material passes through the vibrating screen cylinder 2, the screen 24 may discharge the material with a diameter smaller than a predetermined value. Because the problem that the sintering efficiency is low when the mixtures with different particle sizes are stacked together in the related technology is solved, the embodiment of the application firstly discharges the materials with small diameters, and coke also exists in the materials, so that the high carbon powder content in the small-particle mixtures can be ensured during screening, and the sintering heat of the sintering ore is improved.

In some embodiments, the screen 24 is provided with a screening hole, and the aperture of the screening hole is 0.01mm, so that the preset value is 0.01 mm. In some embodiments, the vibration member 25 vibrates at a frequency of 10Hz and an amplitude of 5 mm. The vibration member 25 may be a vibration disk. In some embodiments, the vibratory screening cartridge body 21 is cylindrical in shape and the screen 24 corresponds to a central angle of 90 °.

In some embodiments, a rubber ring 6 is arranged between the first cylinder body 11 and the vibrating sieving cylinder body 21; a rubber ring 6 is arranged between the second cylinder body 31 and the vibration screening cylinder body 21. Rubber ring 6 can avoid when the vibration part 25 work vibrating screen section of thick bamboo 2 vibration cause vibrate the impact between a section of thick bamboo 2 and first branch section of thick bamboo 1 and second branch section of thick bamboo 3 respectively, rubber ring 6 can play absorbing effect, the extension the life-span of device.

The upper end of one side of the second separating cylinder 3, which is close to the vibrating screening cylinder 2, is provided with a second feeding hole 33. The side of the second separating cylinder 3 away from the vibrating screening cylinder 2 is provided with a discharge hole 34. Specifically, limestone and ground iron ore may be fed into the second distribution pipe 3 through the second feed port 33. The limestone and the ground iron ore may be mixed with the material transferred from the vibratory screening drum 2 and finally discharged from the discharge port 34. Because the material of following discharge gate 34 exhaust belongs to the large granule material, the coke content of this large granule material is less, but the lower floor at the sintering platform truck can be laid to the direct great granule, can avoid the emergence of sintering after the bottom heat accumulation excessive melting phenomenon, and the large granule material can improve the gas permeability simultaneously, improves sintering efficiency.

The embodiment of the application carries out the screening of tiny particle material in advance through screen cloth 24 on the vibration screening section of thick bamboo 2, then by second feed inlet 33 on the second branch section of thick bamboo 3, it further mixes with the iron ore after the ore grinding to continue to add the lime stone, the mixture that will be greater than the screening hole aperture in screen cloth 24 further mixes, guarantee that the material among the mixing arrangement sieves big footpath and path granule in the mixing stage, be convenient for put into sintering pallet bottom with the large granule material when sintering behind the mixing process, place the tiny particle material in sintering pallet top, this kind distributes with different particle diameter layering, can improve the gas permeability greatly, promote sintering efficiency, shorten sintering cycle, the energy can be saved.

In some embodiments, the material discharged from the discharge port 34 may be transferred to the sintering pallet and laid on the sintering pallet by a belt conveyor. In addition, another belt conveyor can be utilized to convey the small-particle materials discharged from the screen 24 onto the sintering trolley and lay the materials on the upper layer discharged from the discharge port 34, so that the large-particle materials on the lower layer can improve the air permeability, the small-particle materials on the upper layer have high carbon powder content, and finally the problems in the related technology can be avoided, the sintering efficiency is improved, and the energy is saved.

In some embodiments, in order to ensure that the screen 24 is not blocked by the material, the lower end of the second separation drum 3 is provided with a high-pressure air injection device 7, and the nozzle of the high-pressure air injection device 7 is aligned with the screen 24.

The embodiment of the application also provides a method for mixed screening of sintered ores, which is applied to the device and comprises the following steps:

placing coke, limestone and ground iron ore as first materials into the first barrel 1 through the first feed inlet 13; the rotating shaft 4 continuously rotates, and the first materials are mixed and move towards the direction of the vibrating screening cylinder 2 by utilizing the plowshare 5 arranged on the rotating shaft 4;

when the first material moves to the vibration screening drum 2, the first material with the diameter smaller than the preset value is discharged through the screen 24; after the first material directly smaller than the preset value is discharged, the rest material is conveyed into the second branch cylinder 3 by the plowshare 5;

a second material is put into the second branch cylinder 3 through a second feeding hole 33, wherein the second material comprises limestone and iron ore after ore grinding; the remaining material and the second material continue to mix and pass to the discharge port 34 for discharge.

In some embodiments, the lower end of the second branch drum 3 is provided with a high-pressure air injection device 7, and air can be injected to the screen 24 by using the high-pressure air injection device 7 every 10min, so that the screening holes on the screen 24 are not blocked.

As can be seen from the above technologies, the present application provides a method and an apparatus for mixed screening of sintered ore, where the apparatus includes a mixing component 100 and a mixing drum 200; the mixing part 100 is disposed inside the mixing cylinder 200; the mixing cylinder 200 comprises a first sub-cylinder 1, a vibrating screening cylinder 2 and a second sub-cylinder 3 which are connected in sequence; the upper end of one side of the first sub-cylinder 1, which is far away from the vibrating screening cylinder 2, is provided with a first feeding hole 13; the lower end of the vibration screening cylinder 2 is provided with a screen 24; the upper end of the vibration screening cylinder 2 is provided with a vibration component 25; a second feed inlet 33 is formed in the upper end of one side, close to the vibrating screening cylinder 2, of the second sub-cylinder 3; a discharge hole 34 is formed in one side, away from the vibrating screening cylinder 2, of the second separating cylinder 3; the mixing part 100 comprises a rotating shaft 4 and a plurality of plowshare 5; the plowshare 5 is arranged on the rotating shaft 4, so that the materials entering the mixing barrel 200 move along the arrangement direction of the first separating barrel 1, the vibrating screening barrel 2 and the second separating barrel 3. The embodiment of the application screens the material and obtains the small granule material and large granule material. The carbon powder content of the small particle materials is high, and the air permeability of the large particle materials is strong. In the subsequent utilization process, the large-particle materials can be laid on the sintering trolley, and the small-particle materials are laid on the upper layer of the large-particle materials, so that the sintering efficiency is finally improved.

The specific manner in which each unit \ module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated herein.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. The sinter mixing and screening device is characterized by comprising a mixing component and a mixing barrel; the mixing component is arranged inside the mixing barrel;

2. The apparatus of claim 1 wherein said plow head comprises a forward pushing plow head and a rearward pushing plow head, said forward and rearward pushing plow heads being spaced apart on said shaft.

3. The apparatus of claim 1, wherein the first cartridge includes a first cartridge body and a first locking lug, the first locking lug being disposed on an outer wall of the first cartridge body on a side adjacent to the vibratory screening cartridge;

4. The device of claim 3, wherein the first, second, third, and fourth locking ears are each four in number.

5. The apparatus of claim 3, wherein a rubber ring is disposed between the first cartridge body and the vibratory screening cartridge body; and a rubber ring is arranged between the second sub-cylinder body and the vibration screening cylinder body.

6. The apparatus of claim 3, wherein the vibratory screening cartridge body is circular in shape and the screen mesh corresponds to a central angle of 90 °.

7. The device of claim 1, wherein the screen mesh is provided with screen holes, and the size of the screen holes is 0.01 mm.

8. The apparatus of claim 1, wherein the vibration member vibrates at a frequency of 10Hz and an amplitude of 5 mm.

9. The device according to claim 1, characterized in that the lower end of the second sub-cylinder is provided with a high-pressure air jet device, the nozzle of which is aligned with the screen.

10. A method for mixed screening of sinter ore, characterised in that the method is applied to an apparatus according to any one of claims 1 to 9, the method comprising:

putting the ground iron ore, coke and limestone into a first sub-barrel through a first feeding hole as first materials; the rotating shaft continuously rotates, and the first material is mixed and moves towards the direction of the vibrating screening cylinder by utilizing the plowshare arranged on the rotating shaft;