JP3336848B2 - Equipment for charging sintering raw materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sintering machine for producing sinter used as a raw material for a blast furnace, in which a raw material is charged on a moving sintering pallet. Related to the device.

[0002]

2. Description of the Related Art In a sintering machine for producing a sintered ore used as a raw material for a blast furnace, a raw material obtained by mixing a coke powder and a lime powder in an iron ore is charged and deposited on a pallet. The iron ore is sintered by burning the coke in the raw material layer while the pallet is moving, thereby producing a sintered ore. The sintering raw material charged on the pallet is in a state where the particle size is segregated in the thickness direction of the raw material layer in order to secure air permeability and combustibility of the raw material layer at the time of sintering, that is, the finer the particle size is on the upper side of the raw material layer It is necessary to charge the material so that the material is deposited.

[0003] As a device capable of such a particle size segregation charging of a sintering raw material, there is known a raw material charging device disclosed in Japanese Patent Laid-Open No. 5-1335. This apparatus is provided with a screen-like chute for charging a particle size segregation which is inclined downward with respect to the moving direction of the pallet below a raw material supply mechanism such as a roll feeder. A large number of rods are arranged in parallel at intervals and the gap between these rods is narrowed toward the upper part of the chute.

FIG. 18 shows the state of charging of the sintering raw material by such a charging device. The sintering raw material which is discharged from the raw material supply mechanism 40 and slides down on the screen-shaped chute 41 is shown in FIG. Rod 4
Since the gap between the two is smaller toward the upper part of the chute, the rod 4
When the material falls on the pallet 43 through the gap between the two, it is sieved in accordance with the particle size, and the raw material having a larger particle size is loaded on the raw material loading start end side of the pallet 43. As a result, the raw material layer after the charging is in a state in which the raw material particle size becomes finer toward the upper layer side. However, such a screen-like shoot 4
In the charging apparatus having the above-mentioned method, the raw material powder such as lime powder or coke powder in the sintering raw material adheres to the rods 42 of the screen-shaped chute and closes the gap between the rods 42 in a short time, so that the screen-shaped There is a problem that the original function of the chute cannot be performed.

As a charging device for solving such a problem, Japanese Patent Application Laid-Open No. Hei 7-229684 employs a wire rope instead of a screen-like chute rod.
By sequentially changing the direction of one or more sets of endless wire ropes via pulleys, a number of wire rope portions parallel to the pallet width direction are formed in parallel,
A guide member for both wire support and scraping of attached matter is provided at several places in the middle part of these parallel wire rope portions, and the wire rope portion is inserted into the guide holes, and each endless wire rope is driven by a driving device. Is 1
There has been proposed an apparatus in which the endless wire rope is circulated or reciprocated by the driving force of being restrained or wound around the driving drum several times between a pair of driving pulleys. In this raw material charging apparatus, when the sintering raw material has adhered to the wire rope portion forming the chute surface, each endless wire rope is moved by a driving device,
The attached sintering material is scraped off when the wire rope passes through the guide hole of the guide member.

[0006]

However, such a conventional apparatus has the following problems. Since the endless wire rope easily slips on the drive pulley or the drive drum, the wire rope may not move smoothly and accurately. In particular, when the endless wire rope is reciprocated at a predetermined stroke (a stroke longer than the interval between the guide members), slippage is likely to occur, and an error is likely to occur in the moving distance of the wire rope. For this reason, the moving distance of the wire rope becomes shorter than the set stroke, and a wire rope portion that cannot reach the guide hole of the guide member is generated, and the function of removing the attached matter may not be sufficiently performed. Further, due to the slippage of the wire rope as described above, the wire rope portion constituting the chute surface is slackened, and the size of the gap between the wire ropes is disturbed, thereby impairing the original grain size segregation charging function of the apparatus. Easily. Since the wire rope slides on the driving pulley or the driving drum, it is worn in a short period of time and easily broken.

[0007] Since the long endless wire rope is moved by being constrained by a frictional force with a driving pulley or a driving drum and being forcibly pulled in one direction, the elongation of the wire rope may be caused by long-term use. As a result, as in the case described above, the wire rope portion constituting the chute surface is slackened, and the size of the gap between the wire ropes is disturbed, so that the inherent grain size segregation charging function of the apparatus is easily impaired. In addition, a large load is applied to the pulling side of the wire rope, and the wire rope is liable to be twisted when used for a long time, so that the wire rope itself is likely to be broken. In the method in which the wire rope is moved by wrapping the wire rope around the drive drum, the winding displacement and twist on the drive drum occur due to the elongation and twist of the wire rope.
An error easily occurs in the moving distance of the wire rope. For this reason, as in the above case, when the endless wire rope is reciprocated at a predetermined stroke, a wire rope portion that cannot reach the guide hole of the guide member occurs, and the function of removing the attached matter may not be sufficiently performed. .

Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art and to smoothly and accurately move a screen component made of a wire rope or the like, thereby adhering to the outer surface of the screen component. Provided is a raw material charging device having a screen-shaped chute that can reliably remove a sintering raw material, does not impair the original particle size segregation charging function of the device, and does not easily break a wire rope or the like. It is in.

[0009]

The constitution of the present invention for solving such a problem is as follows. [1] Below the raw material supply mechanism for supplying the sintering raw material on the pallet, the sintering raw material supplied from the raw material supply mechanism is charged onto the pallet in a state where the sintering material is segregated in the grain thickness direction. A screen-like chute inclined downward with respect to the direction of movement of the pallet, the screen-like chute is a rope-like body or a rod-like body substantially parallel to the pallet width direction, and is arranged in parallel at intervals in the pallet longitudinal direction. A plurality of screen components arranged in a pallet, and a plurality of guide members having guide holes through which the plurality of screen components are inserted, and a plurality of guide members arranged at intervals in the pallet width direction. A sintering raw material charging apparatus having a structure in which the screen component is inserted into each guide hole of the above and the gap between adjacent screen components is narrowed toward the upper side of the chute. The component member is movable in the longitudinal direction thereof, and one end of each of two adjacent screen components is connected via a connecting member having at least a part of the longitudinal direction formed by a chain. Is wound around a rotatable driven sprocket wheel, and the other end of each of the two adjacent screen components is directly or connected to a drive unit of a chain sprocket wheel type, rack and pinion type or cylinder type drive unit. A sintering raw material charging apparatus, wherein the two screen components are connected to each other via a member, and the two screen components are moved in opposite directions by the driving device.

[2] Below the raw material supply mechanism for supplying the sintering raw material to the pallet, the sintering raw material supplied from the raw material supply mechanism is charged onto the pallet in a state where the sintering material is segregated in the layer thickness direction. A screen-like chute inclined downward with respect to the direction of movement of the pallet, the screen-like chute is a cord-like body or a rod-like body substantially parallel to the pallet width direction, and has an interval in the pallet longitudinal direction. A plurality of screen components arranged in parallel, and having a guide hole for inserting the plurality of screen components, having a plurality of guide members arranged at intervals in the pallet width direction, In the sintering raw material charging apparatus having a structure in which the screen component is inserted into each guide hole of the guide member, and a gap between adjacent screen components is narrowed toward the upper side of the chute, A screen constituent member group consisting of two or more screen constituent members is formed by making the screen constituent members movable in the longitudinal direction and connecting both ends of two or more adjacent screen constituent members via a connecting member. One end of each of two sets of adjacent screen components or one set of screen components and one end of one adjacent screen component are formed by a chain at least partially in the longitudinal direction. And a chain of the connecting members is wound around a rotatable driven sprocket wheel.
A set of screen components and the other end of the one screen component adjacent thereto are connected directly to or connected to a drive unit of a chain / sprocket wheel type or rack / pinion type or cylinder type drive device. And the two sets of adjacent screen components or the one set of screen components and the one adjacent screen component are moved in opposite directions by the driving device. An apparatus for charging a sintering raw material, comprising:

[3] In the apparatus of the above-mentioned [1] or [2], the driving device comprises a chain-sprocket wheel type driving device, and the driving device includes a pair of driving sprocket wheels provided coaxially and the driving sprocket wheel. A pair of chains wound in opposite directions about a pair of drive sprocket wheels, with one end of the pair of chains being at the other end of each of two adjacent screen components or adjacent to each other. Each other end of two sets of screen components or one set of screen components and the other end of one screen component adjacent thereto are connected directly or via a connection member. Characteristic equipment for charging sintering raw materials.

[4] In the apparatus of the above-mentioned [1] or [2], the drive unit comprises a chain-sprocket wheel type drive unit, and the drive unit comprises one drive sprocket wheel and a chain wound therearound. At each end of the chain, the other end of two adjacent screen components, or the other end of two adjacent sets of screen components or one set of screen components and adjacent thereto. An apparatus for charging a sintering raw material, wherein each other end of one screen component is connected directly or via a connection member. [5] In the apparatus according to any one of the above [1] to [4], the driving sprocket wheel constituting the driving device is driven at an arbitrary time interval by a timer, and is rotated in the opposite direction each time it is driven. An apparatus for charging sintering raw materials, characterized in that:

[6] An apparatus for charging a sintering raw material according to any one of the above [1] to [5], wherein an outer surface of the screen component is coated with a resin. [7] In the apparatus according to any one of [1] to [6], a resin bush is provided inside the guide hole of the guide member through which the screen component is inserted. apparatus. [8] The charging of the sintering raw material according to any one of the above [1] to [7], wherein a breakage detector for detecting breakage of a screen component is attached to a support mechanism of the driven sprocket wheel. apparatus.

[0014]

1 and 2 show one structural example of a raw material charging apparatus according to the present invention. The raw material charging apparatus has a raw material supply mechanism 1 for supplying a sintering raw material onto a pallet, and a screen-like chute 2 arranged below the raw material supply mechanism 1. The raw material supply mechanism 1 includes a hopper 3 for a sintering raw material, a roll feeder 4 for discharging the sintering raw material from a lower end opening of the hopper 3, and a drum chute 4 '.
have. However, the configuration of the raw material supply mechanism 1 is not limited to the present structural example, and for example, the above-mentioned hopper 3,
A belt conveyor may be provided instead of the roll feeder 4 and the drum chute 4 ′, and the sintering raw material may be directly supplied onto the screen chute 2 from the end of the belt conveyor.

The screen chute 2 is a pallet (not shown) for sintering the raw material supplied from the raw material supply mechanism 1.
The upper part is inclined downward with respect to the direction of movement of the pallet, and the upper end thereof is disposed at a raw material discharging portion of the raw material supply mechanism 1 (a roll feeder in this structural example). It is arranged so as to be located almost directly below 4). The screen-shaped chute 2 includes a plurality of screen-constituting members 5 formed of a cord-like body (for example, a wire rope or the like) or a rod-like body (for example, a solid or hollow rod or the like) and substantially parallel to a pallet width direction. A guide member for supporting an intermediate portion of the member and for scraping off the sintering raw material attached to the outer surface of the screen component;

The plurality of screen constituting members 5 are movable in the pallet width direction with respect to the guide member 6, and are arranged in parallel at appropriate intervals in the pallet longitudinal direction (moving direction). These screen components 5 constitute the chute surface of the screen-like chute 2,
In order to charge the sintering raw materials in a state where the sintering material is segregated, the gaps between the adjacent screen components 5 are arranged so as to become narrower toward the upper side of the chute. When the gap at the top of the chute is w ₁ and the gap at the bottom of the chute is Wn, for example, the size from the gap w ₁ to the gap wn is continuously determined for each gap. The size may be changed, or the size may be changed step by step for some gaps such as gaps w _{1 to} w ₄ , w _{5 to} w ₈ ... Therefore, the structure of the present invention in which the gap between adjacent screen components is narrowed toward the upper portion of the chute includes these various aspects.

The arrangement of the screen components 5 in the longitudinal direction of the pallet may be linear or concavely curved. However, in order to slow down the sliding speed of the sintering raw material and to ensure that the raw material is sieved by the screen, the whole structure is required. It is particularly preferable to make a concave curved array, or to make only the upper part of the chute a straight line as shown in FIG. 18 and to form a concave curved array thereafter. Further, as described above, the screen constituting member 5 can be composed of a wire rope, a rod (including a hollow rod) or the like, but a wire rope is particularly preferable in terms of cost, strength, handleability, and the like. However, the screen component 5 is made of a wire rope. The cross-sectional shape of the screen component 5 is arbitrary.

A plurality of the guide members 6 are arranged at appropriate intervals in the pallet width direction, and are supported and fixed to a support member such as a frame (not shown). A plurality of guide holes 7 for inserting the screen component 5 are formed in each guide member 6 at intervals in the longitudinal direction, and the screen component 5 is slidably inserted into these guide holes 7. I have. These guide members 6 support an intermediate portion of the long screen constituent member 5 to maintain a gap between the screen constituent members, and when the screen constituent member 5 moves and passes through the guide hole 7, the screen structure is changed. It serves to scrape off the sintering raw material attached to the outer surface of the member 5,
Therefore, the spacing between adjacent guide members 6 is selected in consideration of these functions, but is generally 800 mm to 13 mm.
They are arranged at intervals of about 00 mm.

In this structural example, of the plurality of screen components 5 constituting the chute surface, both ends of each two adjacent screen components 5 are connected by a connecting member 23 to form a set of screens. The structural member group A is configured, and therefore, in this structural example, a total of eight sets of screen structural member groups A _{1 to} A ₈ are provided. Then, among these screen component members A, two adjacent screen component members A, A (that is, A ₁ -A ₂ , A ₃ -A ₄ , A ₅₎
-A ₆ , A ₇ -A ₈ ) as one unit so that the screen component 5 can be moved synchronously. For this reason, two adjacent units that constitute one unit
One end of each of the set of screen components A, A is connected by a connecting member 8 having a chain 9 at an intermediate portion, and the other end is a driving unit (chain 10a, 10b) of a driving device 16 described below. Connected to.

The screen-shaped chute 2 has a plurality of driven sprocket wheels 12 for winding a chain 9 of connection members 8 corresponding to the respective units at one end in the pallet width direction, and has at the other end in the pallet width direction. It has a drive device 16 comprising a plurality of pairs of drive sprocket wheels 13a, 13b corresponding to the respective units and chains 10a, 10b wound therearound. A pair of driving sprocket wheels 13a and 13b constituting the driving device 16 are provided coaxially with a driving shaft 14, and the driving shaft 14 is rotationally driven by a motor (not shown) or the like. In addition, the chains 10a, 10b
Are wound around the drive sprocket wheels 13a and 13b in opposite directions.

In each unit, a chain 9 of a connecting member 8 connecting one end side of the screen component members A, A is wound around each driven sprocket wheel 12, while the other members of the screen component members A, A The chains 10 a and 10 b of the drive device 16 are connected to the end side via a connection member 11. Therefore, in the apparatus shown in FIGS. 1 and 2, when the driving sprocket wheels 13a and 13b are rotated in an arbitrary direction, two sets of screen component members A and
One of A performs a forward operation and the other performs a backward operation.

The chain 10 constituting the drive unit 16
a, 10b are driving sprocket wheels 13a, 13b
Are wound with appropriate retraction and are locked by suitable means so as not to fall off the sprocket wheel. 3 and 4 show examples of the structure for that purpose.
FIG. 3 shows a state in which the end 100 of the chain 10 is fixed to the driving sprocket wheel 13, and FIG. 4 shows a state in which a guide member 15 for restraining the chain 10 is provided along a part of the outer periphery of the driving sprocket wheel 13. . In addition,
The diameters of the drive sprocket wheels 13a and 13b need to be large enough to allow a chain portion having a length of [amount of unwinding of the chain] + [amount of movement of the screen component] to be wound around the outer periphery.

In the structural examples shown in FIGS. 1 and 2, since the screen constituting member 5 is formed of a wire rope, it is necessary to apply tension to the screen constituting member 5. Therefore, the fixed driving sprocket wheels 13a and 13b are provided with the screen rope 5. On the other hand, the position of the driven sprocket wheel 12 can be adjusted in the pallet width direction, and a tension is applied to the screen constituent members 5 constituting the screen constituent member group A, and the tension can be arbitrarily adjusted. Specifically, the bracket 1 for rotatably holding the driven sprocket wheel 12
7 is supported on a fixed base 18 via a support member 19, and a length adjustment mechanism 20 (for example, a known means using a turnbuckle or a long hole) is provided on the support member 19, and the length of the support member 19 is reduced. , The position of the driven sprocket wheel 12 in the pallet width direction can be adjusted. In other drawings, 27 is a guide sprocket wheel for guiding the chains 10a and 10b.

The outer surface of the wire rope constituting the screen constituting member 5 may be coated with a resin such as urethane resin in order to suppress the adhesion of the sintering raw material and to enhance the effect of scraping off the sintering raw material. preferable. As shown in FIG. 5, a bush 34 made of resin (for example, made of urethane resin) is attached to the inside of the guide hole 7 of the guide member 6 to prevent abrasion of the screen component 5 sliding in the guide hole. Is preferred.

FIG. 6 shows an example of a structure in which a breakage detector 21 for immediately detecting when the screen constituting member 5 is broken by any chance is provided. In this structure example, the driven sprocket wheel 12 The end of the support member 19 is attached to the fixed base 18 so as to be tiltable at least downward, and the switch lever 2 of the limit switch constituting the breakage detector 21 is provided below the support member 19.
2, the switch lever 22 is operated by the support member 19 that tilts downward when the screen component 5 is broken (broken), so that the breakage of the screen component 5 can be immediately detected. .

The breakage detector 21 is not limited to the structure shown in FIG. 6. For example, a tension detector may be provided at an intermediate portion of the support member 19 or a portion attached to the fixed base 18 or the like.
An appropriate configuration can be adopted. In the structural examples shown in FIGS. 1 and 2, each screen component group A can be composed of two or more screen components 5 of an arbitrary number, and two sets of screen components 5 constituting one unit. The screen component members may have a different number of screen component members 5 constituting them.

In the structural example shown in FIGS. 1 and 2, two sets of screen components A, A are moved as one unit. For example, as shown in FIG. It is also possible to adopt a structure in which the two screen components 5 are moved as one unit.
That is, in this case, one end of each of the two adjacent screen components 5 is connected to the connecting member 8 having the chain 9.
And the screen components 5, 5
Are connected to the chains 10a and 10b constituting the drive unit 16 directly or via an appropriate connecting member. In the device shown in FIG. 7, when the drive sprocket wheels 13a and 13b are rotated in arbitrary directions,
Either one of the two screen components 5 and 5 constituting one unit performs the forward movement, and the other performs the backward movement. Since other configurations are the same as those shown in FIGS. 1 and 2, the same reference numerals are given and the detailed description is omitted.

Further, as shown in FIG. 8, a structure may be employed in which one set of screen components A and one screen component 5 adjacent thereto are moved as one unit. That is, in this case, both ends of two or more adjacent screen constituent members 5 are connected to the connecting member 2.
3 to form a screen component member group A. The screen component member group A and one end of the screen component member 5 adjacent thereto are connected by a connecting member 8 having a chain 9, and these screen component members are connected. The other ends of the group A and the screen constituting member 5 are connected directly or by the connecting member 1.
1, the chains 10a, 1 constituting the driving device 16
0b. Also in this case, the screen component group A includes two or more arbitrary number of screen components 5.
Can be configured. In the apparatus shown in FIG. 8, when the driving sprocket wheels 13a and 13b are rotated in an arbitrary direction, one of the screen component group A and the screen component member 5 constituting one unit performs the forward movement. , The other performs a return operation. Since other configurations are the same as those shown in FIGS. 1 and 2, the same reference numerals are given and the detailed description is omitted.

FIG. 9 shows another example of a structure using a chain and sprocket wheel type driving device 16.
In this structural example, the other end side (drive side) of the two sets of screen components A, A constituting one unit,
Like the one end side (driven side), the chain 2
5, and the chain 25 is wound around a horizontal drive sprocket wheel 26. In such a structural example, it is only necessary to provide one drive sprocket wheel 26 for two sets of screen components A, A constituting one unit. The driving device 16 shown in FIG. 9 can also be applied to the structural examples shown in FIGS. In the apparatus shown in FIG. 9, when the driving sprocket wheel 26 is rotated in an arbitrary direction, one of the two sets of screen components A, A constituting one unit performs a forward movement, and Performs a return operation. In the drawing, reference numeral 33 denotes a guide sprocket wheel for guiding the chain 25. Other configurations are the same as those shown in FIGS. 1 and 2, and thus the same reference numerals are given and detailed description is omitted.

FIGS. 10 and 11 show other structural examples using a drive unit other than the chain and sprocket wheel type. FIG. 10 shows a rack and pinion type drive system, and FIG. 11 shows a cylinder type drive unit such as an air cylinder. 16 shows a structural example using the same. In the structure shown in FIG. 10, a pair of parallel rack bodies 28a and 28b are arranged on the other end side of two sets of screen components A and A constituting one unit so that the racks 280 are opposed to each other. In addition to being provided so as to be movable in the pallet width direction along 29, a pinion 30 is provided between both racks 28a and 28b so as to mesh with the two racks 280. It is connected to the other end of each of the member groups A, A. In the apparatus shown in FIG. 10, when the pinion 30 is rotated in an arbitrary direction, the rack 28
a and 28b perform the forward movement, and the other performs the forward movement, and the screen components A and A also perform the forward movement and the backward movement in accordance with the movement of the rack bodies 28a and 28b.

In the structure shown in FIG. 11, a pair of cylinder devices 32a, 32b (air cylinder, hydraulic cylinder, etc.) are provided on the other end side of two sets of screen components A, A constituting one unit. , The pair of cylinder devices 32
Each of the operating rods 320 a and 32 b is connected to the other end of the screen component members A via the connecting member 31. In the apparatus shown in FIG. 11, one of the operating rods 320 of the pair of cylinder devices 32a and 32b is moved forward and the other is moved backward, and the screen component members A and A are moved in accordance with the movement of the operating rod 320.
Also perform forward and backward movements. The driving device 16 shown in FIGS. 10 and 11 can be applied as a driving device having any of the structural examples shown in FIGS. 1 and 2 and FIGS. In the apparatus of the present invention, a plate-shaped chute is provided above the screen-shaped chute 2 instead of the drum chute 4 ', that is, a plate-shaped chute is provided substantially directly below the raw material dispensing section, and an extension line below the chute is provided. It is good also as a structure which provides the screen-shaped chute 2. Further, a structure without the drum chute 4 'or the plate-shaped chute may be adopted.

Next, an example of use and operation of the raw material charging apparatus of the present invention will be described with reference to structural examples shown in FIGS. The basic particle size segregation charging function of the screen chute 2 constituting the apparatus of the present invention is the same as that of the conventional apparatus shown in FIG. On the other hand, in the apparatus of the present invention, each unit is constituted by driving the driving device 16 at a predetermined time interval during operation and alternately rotating the driving sprocket wheels 13a and 13b in the opposite direction each time the driving is performed. The pair of screen components A, A to be reciprocated in the pallet width direction. The reciprocating movement stroke of the screen component 5 is set longer than the interval between the adjacent guide members 6.

For example, when the distance between the adjacent guide members 6 is 900 mm, the screen component members A are moved in the direction of the solid arrows by rotating the driving sprocket wheels 13a, 13b in the direction of the solid arrows in FIG. For example, it stops when it moves 1100 mm.
Next, after a lapse of a predetermined time (for example, about 15 minutes), the screen components A, A are moved in the direction of the dashed arrow by rotating the drive sprocket wheels 13a, 13b in the direction of the dashed arrow opposite to the above-described rotation direction. The screen is stopped when it returns to the original position, and the driving / stopping is repeated thereafter to reciprocate the screen component members A of each unit.

The sintering raw material adhered to the outer surface of the screen member 5 is scraped off when the member passes through the guide hole 7 of the guide member 6, but the moving distance (stroke) of the screen member 5 is limited by the guide. Since the distance is larger than the interval between the members 6, the entire length of the member passes through the guide hole 7 of the guide member 6 every time the screen constituting member 5 moves (forward or backward), and the sintering adheres to the outer surface. Raw materials are properly removed.
Since the moving operation of the screen component 5 is performed at appropriate time intervals, adhesion and deposition of the sintering material on the outer surface of the screen component 5 are effectively suppressed.

Such an operation can be obtained similarly in the structural examples shown in FIGS. 7 to 9, FIG. 10, and FIG. For example, in the case of the structure example of FIG. 9 as well, the driving sprocket wheel 26 is rotated forward and reverse at predetermined time intervals in the same manner as described above, and in the case of the structure example of FIG. By rotating forward and backward at every interval, a pair of cylinder devices 32a,
By moving the operating rod 320 of 32b in the opposite direction at predetermined time intervals, the screen components A, A are reciprocated by a predetermined stroke. The driving conditions and usage of the screen components in the apparatus of the present invention are arbitrary, and are not limited to the above-described aspects.

The apparatus of the present invention comprises a pair of screen components 5, 5 or a group of screen components A, A as one unit, one end of which is connected by a chain 9 and wound around a driven sprocket wheel 12. Since a structure is provided in which a driving device 16 of a chain / sprocket wheel system, a rack and pinion system or a cylinder system is provided and the driving unit is connected to the other end of the screen component 5 or the screen component group A, There is no problem due to the use of such a driving drum or a driving pulley, the screen component 5 accurately moves the set stroke, and the inherent particle size segregation charging function of the apparatus is stable for a long period of time. Can be maintained. In other words, even when a wire rope is used as a screen component, the mechanical means such as the chain / sprocket wheel and the rack / pinion that constitute the driven and drive side mechanisms essentially cause problems such as slipping and elongation. And there is no room for winding deviation, twisting, abrasion, etc., which occur when the wire rope is wound around the driving drum. Absent.

[0037]

【Example】

Example 1 A raw material charging apparatus of the present invention having the structure shown in FIGS. 1 and 2 was installed in a sintering machine, and a sintering operation was performed using the raw material charging apparatus. In this operation, the supply amount of the sintering raw material (sintering raw material obtained by mixing fine ore, limestone, coke and returned ore) was 980 t / hr. In the raw material charging apparatus of the present invention, the screen component 5 constituting the screen chute 2 is a wire rope, and the number thereof is 22. The gap between adjacent screen components 5 is 20 mm at the top of the chute and 24 mm at the bottom of the chute,
The gap was narrowed toward the top of the chute. Regarding the arrangement of the screen components in the longitudinal direction of the pallet, the eight screen components 5 on the upper side of the chute are arranged linearly (an angle with the horizontal plane: 58 °), and the screen components 5 on the lower side are arranged. The arrangement was concave-convex.

As the wire rope constituting the screen constituting member 5, a rope main body (iron core wire) having an outer diameter of 4 mm and having an outer diameter of 11 mm coated with urethane resin was used. A bush 34 made of urethane resin having an inner diameter of 12 mm was attached to the guide hole 7 of the guide member 6 that supports the screen constituent member 5, and the screen constituent member 5 was inserted through the bush 34. The driving conditions of the screen component 5 are as follows: moving distance: 1100 mm / time, moving speed: 2 m /
And drive sprocket wheels 13a, 13b
The screen component 5 was reciprocated in the pallet width direction by being driven at intervals of 5 minutes and rotated in the opposite direction each time.

As a result of observing the adhesion state of the raw material to the screen-like chute 2 during the operation period of 24 hours, the adhesion of the sintering raw material to the screen component 2 was extremely small.
In addition, it was confirmed that the raw material attached to the side of the guide member 6 was also peeled off with the movement of the screen constituting member 5. In the case of the conventional apparatus having no mechanism for moving the screen components, the operator manually removes the sintering material attached to the screen components and the bracket about every two hours. In the raw material charging apparatus described above, such an operation was not required at all during the entire operation period. Also, there was no breakage of the wire rope during operation.

FIG. 12 shows the transition of the sintering operation using the raw material charging apparatus of the present invention in comparison with the case of using the conventional apparatus having no mechanism for moving the screen components. In the sintering operation using the charging device, since the appropriate particle size segregation charging is performed, the uniformity of the sintering state in the pallet width direction is greatly improved compared to the case of using the conventional device, As a result, compared with the conventional equipment, the return unit consumption was 14 kg.
/ T is also reduced, and the sintering yield is greatly improved. For this reason, the basic unit of coke has been reduced by about 1.0 kg / T, and a reduction in fuel cost has been achieved. Further, since the proper particle size segregation charge is stably realized and the gas permeability of the raw material layer is good, the room temperature strength (TI) of the sintered ore is also improved.

Example 2 A sintering operation was performed using the same apparatus and operating conditions as in Example 1, and a total of 5 raw material layers (layer thickness: about 580 mm) in the vicinity of the raw material charging section in the thickness direction were operated during the operation. The raw material was sampled from each location, and the average particle size of the raw material at each sampling location and the coke (carbon) content in the raw material were examined. FIGS. 13 to 16 show the results in comparison with a case where a conventional apparatus having no mechanism for moving the screen components is used. FIG. 13 (the device of the present invention) and FIG.
(Conventional apparatus) shows the average particle size of the raw material in the layer thickness direction, and FIGS. 15 (present apparatus) and FIG. 16 (conventional apparatus) show the coke (carbon) content in the raw material in the layer thickness direction. I have.

Here, in the case of the apparatus of the present invention shown in FIGS. 13 and 15, since the screen constituting member 5 moves at intervals of approximately 15 minutes, the screen constituting member 5 performs one moving operation. After 5 minutes have elapsed (average particle size and coke content indicated by (A) in the figure) and the next screen component 5
3 shows the result of sampling immediately after the lapse of a little less than 15 minutes (the average particle size and coke content shown in (B) of the figure) immediately before the moving operation of FIG. On the other hand, in the case of the conventional apparatus shown in FIGS. 14 and 16, the sampling results after 5 minutes and 120 minutes have passed since the screen chute was manually cleaned (removal cleaning of the attached sintering material). Is shown.

First, regarding the particle size distribution of the raw material in the layer thickness direction, in the case of the apparatus of the present invention shown in FIG.
Even after a lapse of less than 5 minutes, there was almost no change, and an appropriate segregation charge state with a smaller particle size was obtained in the upper layer side. 15
Since the screen component 5 performs the moving operation at minute intervals,
The segregated charging state is not substantially worse than the state (B) shown in FIG. On the other hand, in the case of the conventional device having no mechanism for moving the screen components shown in FIG.
Since the sintering material gradually adheres and accumulates on the outer surface of the screen component, and the gap between the screen components is closed, the particle size distribution in the layer thickness direction is averaged 120 minutes after the cleaning, and the appropriate particle size segregation device is used. The on state cannot be obtained.

Regarding the coke content distribution in the layer thickness direction, in the case of the apparatus of the present invention shown in FIG. 15, the screen constituent member 5 performs the moving operation even after 5 minutes or less than 15 minutes have passed. There was no significant change, and an appropriate segregation charge state in which the coke content was higher in the upper layer side was obtained.
As described above, in this apparatus, since the screen component 5 performs the moving operation at intervals of 15 minutes, the segregated charging state is not substantially worse than the state after a lapse of less than 15 minutes shown in FIG. On the other hand, in the case of the conventional apparatus having no screen component moving mechanism shown in FIG. 16, the sintering material gradually adheres and accumulates on the outer surface of the screen component, and the gap between the screen components is closed. After cleaning 12
After 0 minute, the coke content in the layer thickness direction is averaged, and it becomes impossible to obtain a proper segregation charging state in which the coke content is higher in the upper layer.

Example 3 A sintering operation was performed using the same equipment and operating conditions as in Example 1, and 18WB (wind box)-No. The temperature distribution in the width direction of the pallet under the sintering machine between 23 WB (wind box) was examined. FIG.
Shows the results in comparison with the case where a conventional apparatus having no mechanism for moving the screen components is used.
In the case of the conventional apparatus shown in FIG. 1B, the temperature distribution shown in FIG.
In the case of the device of the present invention shown in FIG.
Approximately 5 minutes after the screen component performs one movement
The temperature distribution when the raw material layer charged after passing less than about 15 minutes has passed is shown.

In the case of the conventional apparatus shown in FIG. 17A, a large temperature difference occurs in the pallet width direction, and it is clear that the sintering state in the pallet width direction varies. This indicates that the raw material adheres and accumulates on the screen-like chute of the raw material charging device, impairs the particle size segregation charging function, and the segregation charging is not properly performed. On the other hand, in the case of the apparatus of the present invention shown in FIG. 2B, the temperature difference in the pallet width direction is remarkably eliminated as compared with FIG. It shows that the segregation charge can be stably maintained.

[0047]

According to the above-described apparatus for charging a sintering raw material according to the present invention, the movement of the screen components such as the wire rope constituting the screen-shaped chute is controlled by the elongation, torsion, wear and breakage of the wire rope and the like. It can be performed smoothly and accurately for a long time without problems such as problems, so that the function of removing the sintering material adhered to the outer surface of the screen component and the function of charging the original particle size segregation of the equipment are stable for a long time Can be maintained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one structural example of a raw material charging apparatus of the present invention.

FIG. 2 is a perspective view showing a pair of screen constituent members constituting one unit and a driving mechanism thereof in the structural example shown in FIG. 1;

FIG. 3 is a front view showing one structural example of a chain locking mechanism for a driving sprocket wheel, which is applied to the structural examples shown in FIGS. 1 and 2;

FIG. 4 is a front view showing another structural example of the locking mechanism of the chain to the driving sprocket wheel, which is applied to the structural examples shown in FIGS. 1 and 2;

FIG. 5 is a partial perspective view showing one structural example of a guide member in the raw material charging apparatus of the present invention.

FIG. 6 is a front view showing an example of the structure of a breakage detection mechanism attached to the raw material charging device of the present invention.

FIG. 7 is a perspective view showing another structural example of the raw material charging apparatus of the present invention, showing a pair of screen constituting members constituting one unit and a driving mechanism thereof.

FIG. 8 is a perspective view showing another example of the structure of the raw material supply device of the present invention, showing a group of screen components constituting one unit, a screen component, and a driving mechanism thereof.

FIG. 9 is a perspective view showing another example of the structure of the raw material charging apparatus of the present invention, showing a pair of screen constituent members constituting one unit and a driving mechanism thereof.

FIG. 10 is a perspective view partially showing a pair of screen constituting members constituting one unit and a driving device thereof, showing another structural example of the raw material charging apparatus of the present invention.

FIG. 11 is a plan view partially showing a pair of screen constituting members constituting one unit and a driving device thereof, showing another structural example of the raw material charging apparatus of the present invention.

FIG. 12 shows a sinter production rate in the sintering operation of Example 1,
Graph showing changes in coke intensity, return ore intensity, TI, and -4mm product rate

FIG. 13 is a graph showing the raw material particle size distribution in the thickness direction of the raw material layer when the raw material is charged using the apparatus of the present invention in Example 2.

FIG. 14 is a graph showing the raw material particle size distribution in the thickness direction of the raw material layer when the raw material is charged using the conventional apparatus in Example 2.

FIG. 15 is a graph showing the coke content distribution in the thickness direction of the raw material layer when the raw material is charged using the apparatus of the present invention in Example 2.

FIG. 16 is a graph showing the coke content distribution in the thickness direction of the raw material layer when the raw material is charged using the conventional apparatus in Example 2.

FIG. 17 is a graph showing a temperature distribution in a pallet width direction under a sintering machine in a sintering operation in Example 3.

FIG. 18 is an explanatory view showing the principle of particle size segregation charging by a raw material charging device having a screen chute.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Raw material supply mechanism, 2 ... Screen chute, 3 ... Hopper, 4 ... Roll feeder, 4 '... Drum chute, 5
... Screen component members, 6 ... Guide members, 7 ... Guide holes, 8 ... Connection members, 9 ... Chains, 10a, 10b ... Chains, 11 ... Connection members, 12 ... Driving sprocket wheels, 13a, 13b ... Drive sprocket wheels, 1
4 drive shaft, 15 guide member, 16 drive device, 17
... bracket, 18 ... fixed base, 19 ... support member, 20
... Length adjustment mechanism, 21 ... Breakage detector, 22 ... Switch lever, 23 ... Connecting member, 24 ... Connecting member, 25 ... Chain, 26 ... Drive sprocket wheel, 27 ... Guide sprocket wheel, 28a, 28b ... Rack body, 29
... Guide, 30 ... Pinion, 31 ... Connecting member, 32a,
32b: cylinder device, 100: chain end, 320
... Actuating rod, 280. Rack part, A, A _{1 to} A ₈ .

Continuation of the front page (72) Inventor Kenji Okubo 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Hidetoshi Noda 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (56) References JP-A-8-240388 (JP, A) JP-A-8-42977 (JP, A) JP-B-6-58194 (JP, B2) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) F27B 21/10 C22B 1/20

Claims (8)

(57) [Claims] 1. A sintering raw material supplied from a raw material supply mechanism is charged below a raw material supply mechanism for supplying a sintering raw material onto a pallet in a state where the sintering raw material is segregated in a grain size direction in a layer thickness direction. For this purpose, a screen-like chute inclined downward with respect to the pallet moving direction is provided, and the screen-like chute is a cord-like body or a rod-like body substantially parallel to the pallet width direction, and is spaced apart in the pallet longitudinal direction. A plurality of screen components arranged in parallel with each other, and having a guide hole for inserting the plurality of screen components, and having a plurality of guide members arranged at intervals in the pallet width direction, In the sintering raw material charging apparatus having a structure in which the screen component is inserted into each guide hole of the guide member, and the gap between adjacent screen components is narrowed toward the upper side of the chute, The clean component is movable in its longitudinal direction, and one end of each of two adjacent screen components is connected via a connecting member having at least a part of the longitudinal direction formed by a chain. A chain is wound around a rotatable driven sprocket wheel, and the other end of each of the two adjacent screen components is directly or directly connected to a drive unit of a chain sprocket wheel type or rack / pinion type or cylinder type drive unit. A sintering raw material charging apparatus, wherein the two screen components are connected to each other via a connecting member, and the two driving members move in opposite directions by the driving device. 2. A sintering raw material supplied from the raw material supply mechanism is charged below the raw material supply mechanism for supplying the sintering raw material onto the pallet in a state where the sintering raw material is segregated on the pallet in a grain size direction in a layer thickness direction. For this purpose, a screen-like chute inclined downward with respect to the pallet moving direction is provided, and the screen-like chute is a cord-like body or a rod-like body substantially parallel to the pallet width direction, and is spaced apart in the pallet longitudinal direction. A plurality of screen components arranged in parallel with each other, and a plurality of guide members having guide holes through which the plurality of screen components are inserted, and having a plurality of guide members arranged at intervals in the pallet width direction. In the sintering raw material charging apparatus having a structure in which the screen component is inserted into each guide hole of the guide member, and the gap between adjacent screen components is narrowed toward the upper side of the chute, A screen component group consisting of two or more screen components is configured by making the clean component movable in its longitudinal direction and connecting both ends of two or more adjacent screen components via a connection member. Each end of two adjacent sets of screen components or one set of screen components and one end of one adjacent screen component is formed of a chain at least partially in the longitudinal direction. Connected via a connecting member, and a chain of the connecting member is wound around a rotatable driven sprocket wheel, and each other end of the adjacent two sets of screen components or the one set of screen components is connected to each other. The other end of the one screen component adjacent thereto is connected to a chain / sprocket wheel system or a rack / pinion. Connected directly or via a connecting member to a drive unit of a driving system of a cylinder type or a cylinder type, and the two sets of screen component members or the one set of screen component members adjacent to each other by the driving device and adjacent thereto. An apparatus for charging a sintering raw material, wherein said one screen constituent member is configured to move in opposite directions. 3. A drive device comprising a chain-sprocket wheel type drive device, wherein the drive device is provided with a pair of drive sprocket wheels and a pair of drive sprocket wheels disposed coaxially in opposite directions to each other. A pair of chains to be wound around the other ends of two adjacent screen components or the other ends of two adjacent groups of screen components at the ends of the pair of chains. The sintering method according to claim 1, wherein the other end portions of one set of screen components and one screen component adjacent thereto are connected directly or via a connection member. 4. Raw material charging device. 4. A driving device comprising a chain-sprocket wheel type driving device, wherein the driving device comprises a driving sprocket wheel and a chain wound around the driving sprocket wheel, and each end of the chain has two adjacent sprocket wheels. The other end of each of the screen constituent members or the other end of each of two adjacent screen constituent members or one set of the screen constituent members and the other end of one screen constituent member adjacent thereto The sintering raw material charging apparatus according to claim 1, wherein the sintering raw material charging apparatus is connected directly or via a connection member. 5. The driving device according to claim 1, wherein a driving sprocket wheel constituting the driving device is driven at an arbitrary time interval by a timer, and is rotated in the opposite direction each time the driving is performed. 5. The charging device for a sintering raw material according to 3 or 4. 6. The screen member according to claim 1, wherein an outer surface of the screen member is coated with a resin.
6. The charging device for a sintering raw material according to 4 or 5. 7. The sintering raw material according to claim 1, wherein a bush made of resin is provided inside the guide hole of the guide member through which the screen component is inserted. Charging equipment. 8. The firing apparatus according to claim 1, wherein a breakage detector for detecting breakage of a screen component is provided on a supporting mechanism of the driven sprocket wheel. Equipment for charging raw materials.