CN216172747U

CN216172747U - Coal mill for iron-smelting blast furnace

Info

Publication number: CN216172747U
Application number: CN202121917532.3U
Authority: CN
Inventors: 赵建宇; 胥明旺; 马永福; 杨立军; 张莹; 毛立伟; 李建伟; 刘恩虎
Original assignee: Hebei Jinxi Iron And Steel Group Co ltd
Current assignee: Hebei Jinxi Iron And Steel Group Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-04-05
Anticipated expiration: 2031-08-16

Abstract

The utility model provides a coal mill of an iron-making blast furnace, which relates to the technical field of coal milling equipment and comprises a rack, a grinding disc, a driving frame, at least three grinding rollers, a collecting hopper and a louver grating, wherein the grinding disc is arranged on the rack; the driving frame is connected to the rack, a driving shaft is arranged above the driving frame, and the driving shaft is connected with a driving piece; the upper end of the grinding roller is connected with the driving frame; the material collecting hopper is arranged above the grinding disc; the shutter grid is arranged in the aggregate bin. The coal mill of the iron-making blast furnace provided by the utility model has the advantages that the grinding disc is provided with the accommodating cavity for placing the pulverized coal, the grinding roller in the accommodating cavity is driven by the driving frame to rotate around the axis of the driving shaft, the pulverized coal in the accommodating cavity is ground and crushed, the pulverized coal which is ground is collected and gathered by the collecting hopper above the grinding roller under the action of negative pressure equipment and is conveyed to the pulverized coal bin, the louver grids can effectively isolate impurities in the pulverized coal, the impurities are prevented from entering the pulverized coal bin, the purity of the pulverized coal is improved, and powerful support is provided for the full combustion of the pulverized coal.

Description

Coal mill for iron-smelting blast furnace

Technical Field

The utility model belongs to the technical field of coal grinding equipment, and particularly relates to a coal grinding machine of an iron-making blast furnace.

Background

In the iron-making process, the blast furnace needs to utilize a coal powder preparation system to grind raw coal into powder, and the powder is sent to the blast furnace for use through a blowing system, so that the consumption of coke can be reduced, and the production cost can be reduced.

In the prior art, a bowl-type coal mill is mostly adopted for grinding coal powder, the grinding efficiency of a grinding roller is low during use, the fineness of the coal powder is insufficient, the consumption of the coal powder is high, and in addition, the coal mill has no corresponding isolation measure, so that light impurities mixed in the coal powder also enter a blast furnace, the normal smelting of the blast furnace is influenced, and the full combustion of the coal powder is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a coal mill for an iron-making blast furnace, which can improve the grinding fineness of coal powder, effectively filter impurities and facilitate the sufficient combustion of the coal powder.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a coal mill of an iron-making blast furnace, which comprises a frame, a millstone, a driving frame, at least three grinding rollers, a collecting hopper and a shutter grid, wherein the millstone is arranged on the frame and is provided with an accommodating cavity with an upward opening; the driving frame is connected to the rack and is hoisted above the grinding disc, a driving shaft extending along the vertical direction is arranged above the driving frame, and the driving shaft is connected with a driving piece; the upper end of the grinding roller is connected with the driving frame and is used for rotating under the driving of the driving frame so as to grind and cut the coal dust in the grinding disc; the collecting hopper is arranged above the grinding disc and is used for being connected with the pulverized coal bin and conveying pulverized coal into the pulverized coal bin under the action of negative pressure equipment; the shutter grating is arranged in the aggregate bin and positioned above the grinding disc and used for filtering impurities in the pulverized coal.

In a possible realization mode, three grinding rollers are arranged, the three grinding rollers are respectively connected below the driving frame, and the three grinding rollers are distributed in an equilateral triangle in a horizontal plane.

In some embodiments, the driving frame comprises a triangular frame and a middle disc, the projection of the triangular frame on the horizontal plane is an equilateral triangle, and the three grinding rollers are respectively connected below three corner points of the triangular frame; the middle disc is positioned in the center of the triangular frame and connected to the triangular frame by a connection beam extending in the horizontal direction, and the driving shaft is connected to the upper side of the middle disc and positioned in the center of the middle disc.

In some embodiments, the grinding roller is an oval member, the long axis of the grinding roller is arranged in the up-down direction, and the lower end of the grinding roller is in contact fit with the wall of the accommodating chamber.

In one possible implementation manner, the driving part comprises a motor and a speed reducer, and the motor is arranged on the rack; the speed reducer is connected to an output shaft of the motor, and the output shaft of the speed reducer is connected with the driving shaft to drive the driving frame and the grinding roller to rotate around the driving shaft.

In some embodiments, the drive member is peripherally covered with a shield, which is attached to the frame.

In one possible implementation mode, the aggregate bin is an inverted cone-shaped component, and a conveying pipeline communicated with the pulverized coal bin is arranged at the upper end of the aggregate bin.

In some embodiments, the louvers of the louver grille are arranged in a manner of inclining from bottom to top to a side close to the conveying direction of the conveying pipeline.

In some embodiments, the material collecting hopper is further provided with a material inlet, the material collecting hopper is rotatably connected with a material feeding closing plate for closing the material inlet, and the material collecting hopper is further provided with a material feeding hopper positioned at the lower edge of the material inlet.

In a possible realization mode, the grinding disc is a hemispherical component, and the lower end of the grinding disc is provided with a foreign matter outlet for discharging foreign matters.

The shown scheme of this application embodiment, compared with the prior art, the shown scheme of this application embodiment, the mill that sets up in the frame has the chamber that holds of placing the buggy, the grinding roller that holds the intracavity passes through the drive frame and drives the axle center rotation around the drive shaft, the realization is smashed the grinding that holds the buggy in the intracavity, the collecting hopper of grinding roller top gathers together and carries to the buggy storehouse in with the buggy collection that grinds under negative pressure equipment's effect, the tripe grid can effectively keep apart the impurity in the buggy, avoid in impurity gets into the buggy storehouse, help improving the purity of buggy, do benefit to the abundant burning of buggy.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic structural view of a main view of a coal mill of an iron-making blast furnace according to an embodiment of the present invention, partially in cross section;

FIG. 2 is an enlarged schematic view of FIG. 1;

fig. 3 is a schematic top view of the rotating shaft, the triangular frame and the grinding roller in fig. 1 according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1. a frame; 2. a grinding disc; 21. an accommodating chamber; 22. a sundry outlet; 3. a driving frame; 31. a triangular frame; 32. an intermediate tray; 33. a drive shaft; 34. a drive member; 341. a motor; 342. a speed reducer; 35. a connecting beam; 36. a protective cover; 4. grinding the roller; 5. a collection hopper; 51. a feeding closing plate; 52. a hopper; 6. a louver grid; 7. a delivery conduit.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and are therefore not to be considered limiting. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a number" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 3 together, the coal pulverizer for iron-making blast furnace according to the present invention will now be described. The iron-making blast furnace coal mill comprises a frame 1, a grinding disc 2, a driving frame 3, at least three grinding rollers 4, a collecting hopper 5 and a louver grid 6, wherein the grinding disc 2 is arranged on the frame 1, and the grinding disc 2 is provided with an accommodating cavity 21 with an upward opening; the driving frame 3 is connected to the frame 1 and is hung above the grinding disc 2, a driving shaft 33 extending along the vertical direction is arranged above the driving frame 3, and the driving shaft 33 is connected with a driving piece 34; the upper end of the grinding roller 4 is connected with the driving frame 3 and is used for rotating under the driving of the driving frame 3 so as to grind and cut the coal dust in the grinding disc 2; the aggregate bin 5 is arranged above the grinding disc 2 and is used for being connected with the pulverized coal bin and conveying pulverized coal into the pulverized coal bin under the action of negative pressure equipment; the shutter grating 6 is arranged in the aggregate bin 5 and is positioned above the grinding disc 2 and used for filtering impurities in the coal powder.

The iron-smelting blast furnace coal pulverizer that this embodiment provided, compared with the prior art, the iron-smelting blast furnace coal pulverizer that this embodiment provided, the mill 2 that sets up in frame 1 has the chamber 21 that holds of placing the buggy, it is rotatory around the axle center of drive shaft 33 that the grinding roller 4 that holds in the chamber 21 passes through the carriage 3 drive, the realization is smashed the grinding of the buggy that holds in the chamber 21, the collecting hopper 5 of grinding roller 4 top gathers together and carries to the buggy storehouse ground under negative pressure equipment's effect in the collection hopper 5, louver 6 can effectively keep apart the impurity in the buggy, avoid in impurity gets into the buggy storehouse, help improving the purity of buggy, do benefit to the abundant burning of buggy.

In some possible implementations, the grinding roller 4 of the above-described character takes the configuration shown in fig. 3. Referring to fig. 3, three grinding rollers 4 are provided, the three grinding rollers 4 are respectively connected below the driving frame 3, and the three grinding rollers 4 are arranged in an equilateral triangle in a horizontal plane. The three grinding rollers 4 are arranged in the accommodating cavity 21 and are arranged in an equilateral triangle in the horizontal plane, and the three grinding rollers 4 are respectively positioned at three angular points of the equilateral triangle.

In some embodiments, the above features drive the frame 3 in the configuration shown in fig. 3. Referring to fig. 3, the driving frame 3 includes a triangular frame 31 and a middle disc 32, a projection of the triangular frame 31 on a horizontal plane is an equilateral triangle, and three grinding rollers 4 are respectively connected below three corner points of the triangular frame 31; the intermediate plate 32 is located at the center of the triangular frame 31 and is connected to the triangular frame 31 by a connecting beam 35 extending in the horizontal direction, and the drive shaft 33 is connected to the upper side of the intermediate plate 32 and is located at the center of the intermediate plate 32.

The triangular frame 31 is convenient for mounting and laying the grinding rollers 4 below, and three corner points of the triangular frame 31 can correspond to the three grinding rollers 4 one by one and are connected below the triangular frame 31. The middle disc 32 is used for installing a driving shaft 33, so that the driving shaft 33 can drive the triangular frame 31 and the three grinding rollers 4 below, the grinding rollers 4 are driven to rotate to achieve the effect of quickly grinding pulverized coal, the grinding efficiency is improved, and the fineness of the pulverized coal is improved.

In some embodiments, the grinding roll 4 of the above-described character may be configured as shown in fig. 1. Referring to fig. 1, the grinding roller 4 is an oval member, the long axis of the grinding roller 4 is arranged in the up-down direction, and the lower end of the grinding roller 4 is in contact fit with the wall of the housing chamber 21.

The grinding roller 4 is oval spherical, and the periphery wall forms the grinding effect to the buggy with the inner wall that holds the chamber 21, reaches good crushing effect, helps improving the fineness of buggy. The long shaft of the grinding roller 4 is arranged along the vertical direction, so that the occupied space of the grinding roller 4 in the grinding disc 2 is convenient to reduce, the contact area with the pulverized coal is increased, the grinding area is increased, and the grinding efficiency is improved.

In some possible implementations, the feature driver 34 is configured as shown in fig. 2. Referring to fig. 2, the driving member 34 includes a motor 341 and a speed reducer 342, and the motor 341 is disposed on the frame 1; the speed reducer 342 is connected to an output shaft of the motor 341, and the output shaft of the speed reducer 342 is connected to the driving shaft 33 to drive the driving frame 3 and the grinding roller 4 to rotate around the driving shaft 33.

The motor 341 is used for driving the speed reducer 342 to rotate, and the output shaft of the speed reducer 342 is connected with the driving shaft 33, so that the driving action on the driving frame 3 is realized. The above structure facilitates the adjustment of the rotation speed of the drive shaft 33, facilitates the control of the grinding speed, and ensures a good grinding effect.

In some embodiments, the feature driver 34 may be configured as shown in FIG. 2. Referring to fig. 2, the driving member 34 is covered with a protective cover 36 at its outer periphery, and the protective cover 36 is attached to the frame 1. Because driving piece 34 sets up in holding chamber 21, in order to avoid buggy to cause its influence, set up protection casing 36 outside driving piece 34, with buggy and driving piece 34 effective isolation, be convenient for prolong the life of driving piece 34.

In some possible implementations, the set of characteristics described above allows the hopper 5 to adopt the configuration shown in fig. 1. Referring to fig. 1, the aggregate bin 5 is an inverted cone-shaped member, and a conveying pipeline 7 communicated with the pulverized coal bin is arranged at the upper end of the aggregate bin 5.

The aggregate bin 5 is an inverted cone-shaped component, so that the pulverized coal can be conveniently gathered and gathered under the suction action of negative pressure equipment, and the pulverized coal can be conveniently and sequentially conveyed into the pulverized coal bin through the conveying pipeline 7. The structure is beneficial to reducing the resistance in the coal powder conveying process, improving the conveying efficiency of the coal powder and ensuring the conveying smoothness.

In some embodiments, the characteristic louvres 6 described above may be configured as shown in figure 1. Referring to fig. 1, the louvers of the louver grille 6 are arranged to be inclined from bottom to top toward a side close to the conveying direction of the conveying pipe 7.

Because traditional filtration blocks up easily, influences the normal transport of buggy, so adopted 6 structures of tripe grid, this structure both can guarantee effectively to block of bulky impurity, can improve the efficiency of passing through of buggy again, has good filtering effect, and does not influence the passing through of buggy. The upper portion of tripe inclines to the one side that is close to the direction of delivery of pipeline 7 gradually, has improved the smooth and easy nature that the buggy was carried, avoids causing the walking route to the buggy and blocks, has improved the transport efficiency of buggy effectively.

In some embodiments, the collection hopper 5 described above may be configured as shown in FIG. 1. Referring to fig. 1, a material collection hopper 5 is further provided with a material inlet, the material collection hopper 5 is rotatably connected with a material feeding closing plate 51 for closing the material inlet, and the material collection hopper 5 is further provided with a material feeding hopper 52 located at the lower edge of the material inlet.

Pulverized coal is conveyed to the interior of the grinding disc 2 through a feeding hole in the aggregate bin 5, and a feeding closing plate 51 is arranged on the feeding hole and can be opened and closed timely. During feeding, open feeding shrouding 51, utilize in hopper 52 sends the coal dust to holding chamber 21 of mill 2, hopper 52 adopts the form of top-down to feed inlet department slope, and the width of the mouth of a river width is greater than the width of the mouth of a river width on hopper 52, is convenient for control the supply volume of coal dust.

In some possible implementations, the characteristic grinding disc 2 adopts the structure shown in fig. 1. Referring to fig. 1, the grinding disc 2 is a hemispherical member, and the lower end of the grinding disc 2 is provided with a foreign substance outlet 22 for discharging foreign substances.

The grinding disc 2 is of a hemispherical structure, and the accommodating cavity 21 in the grinding disc 2 is also hemispherical, so that a good accommodating effect is achieved. The impurity outlet 22 arranged at the lower part of the grinding disc 2 can discharge the impurities trapped in the shutter grating 6 in the containing cavity 21. The structure effectively improves the cleaning speed of the grinding disc 2 and is beneficial to improving the grinding speed of the pulverized coal.

The coal grinding quantity of the coal grinding machine per hour can reach more than 20 tons, the coal grinding efficiency is improved, the downtime of the coal grinding machine is prolonged, and the arrangement, the maintenance and the overhaul are convenient. Meanwhile, the fineness of the pulverized coal is improved to 75% from the original 65%, the grinding quality of the pulverized coal is guaranteed, and powerful support is provided for the sufficient combustion of the pulverized coal.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Ironmaking blast furnace coal pulverizer, its characterized in that includes:

a frame;

the grinding disc is arranged on the rack and is provided with an accommodating cavity with an upward opening;

the driving frame is connected to the rack and positioned above the grinding disc, a driving shaft extending along the vertical direction is arranged above the driving frame, and the driving shaft is connected with a driving piece;

the upper ends of the at least three grinding rollers are respectively connected with the driving frame and are used for rotating under the driving of the driving frame so as to grind and cut the coal dust in the millstone;

the collecting hopper is arranged above the grinding disc and is used for being connected with the pulverized coal bin and conveying pulverized coal into the pulverized coal bin under the action of negative pressure equipment;

and the shutter grating is arranged in the aggregate bin and positioned above the grinding disc and used for filtering impurities in the coal powder.

2. The coal pulverizer for an iron making blast furnace as claimed in claim 1, wherein said grinding rolls are provided in three numbers, and three of said grinding rolls are respectively connected to a lower portion of said drive frame, and said three grinding rolls are arranged in an equilateral triangle in a horizontal plane.

3. The ironmaking blast furnace coal pulverizer of claim 2, wherein the drive carriage comprises:

the three grinding rollers are respectively connected below three angular points of the triangular frame;

the middle disc is positioned in the center of the triangular frame and connected to the triangular frame through a connecting beam extending along the horizontal direction, and the driving shaft is connected to the upper part of the middle disc and positioned in the center of the middle disc.

4. Iron making blast furnace coal pulverizer as claimed in claim 2, wherein said grinding roller is an oval ball member, the major axis of said grinding roller being disposed in an up-down direction, and the lower end of said grinding roller being in contact engagement with the wall of said receiving chamber.

5. The ironmaking blast furnace coal pulverizer of claim 1, wherein the drive member comprises:

the motor is arranged on the rack;

and the speed reducer is connected to an output shaft of the motor, and the output shaft of the speed reducer is connected with the driving shaft so as to drive the driving frame and the grinding roller to rotate around the driving shaft.

6. The coal pulverizer of an iron making blast furnace as set forth in claim 5, wherein said drive member is peripherally covered with a shield, said shield being attached to said frame.

7. The coal pulverizer of the iron-making blast furnace as claimed in any one of claims 1 to 6, wherein the collecting hopper is an inverted cone-shaped member, and a conveying pipe communicating with the pulverized coal bunker is provided at an upper end of the collecting hopper.

8. The coal pulverizer for an iron making blast furnace as claimed in claim 7, wherein the louver of said louver grille is disposed to be inclined from bottom to top toward a side close to a conveying direction of the conveying pipe.

9. The coal pulverizer for the iron-making blast furnace as claimed in claim 8, wherein said collecting hopper is further provided with a feed inlet, said collecting hopper is rotatably connected with a feed closing plate for closing said feed inlet, and said collecting hopper is further provided with a hopper located at a lower edge of said feed inlet.

10. Iron-making blast furnace coal mill according to any of claims 1 to 6, characterized in that the grinding disc is a hemispherical member, the lower end of which is provided with a trash outlet for discharging impurities.