JPH09184022A - Production of sintered ore and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve gas permeability in the middle and the lower layers in a raw material piling layer formed on a pallet in a sintering raw material charging part of a Dwight Lloyd type sintering machine. SOLUTION: Plural gas permeable control plates 7 horizontally arranged at a fixed interval in the width direction of the pallet 1 are inserted from a raw material sloping surface 5a of the raw material piling layer 5b toward the advancing direction of the pallet 1, and after forming plural gas venting grooves 8 into the middle and the lower layer parts of the raw material piling layer 5b, the raw material piling layer 5b is sintered. Since moisture vaporized from an upper layer of the raw material piling layer 5b is exhausted from the gas venting grooves 8 formed at the middle and the lower layer parts without condensing, the gas permeability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can improve the air permeability of a raw material deposit layer formed on a pallet at a sintering raw material charging portion of a Dwightroid (DL) type sintering machine at middle and lower layers. The present invention relates to a method and an apparatus for producing a sintered ore made possible.

[0002]

2. Description of the Related Art As is well known (see FIG. 13), a method for producing a sintered ore by a DL type sintering machine is such that a floor laying ore is first placed on a pallet floor 1a composed of a great bar of a pallet 1 driven endlessly. Laying bedding ore 11 such as return ore from hopper 10. Next, feed hopper 2 to drum feeder 3
The sintering raw material 5 (hereinafter referred to as the raw material) cut out by the above is supplied via the inclined charging chute 4 onto the pallet 1 on which the bed laying ore 11a is spread, to form the raw material deposition layer 5b. At this time, the raw material slope 5a of the bed deposit hopper 10 side of the raw material deposit layer 5b is deposited according to the angle of repose, and the raw material deposit layer 5b is formed on the downstream side (ignition furnace side). Are leveled flat using a cutoff plate 14.
Then, the raw material deposition layer 5 is formed by using an ignition furnace (not shown) equipped with a plurality of combustion burners arranged in the width direction of the pallet 1.
While igniting the upper layer part of b, intake is performed by a wind box (not shown) arranged under the pallet 1,
This is a method of sintering the raw material deposition layer 5b on the pallet 1 while the pallet 1 moves to the end of the mine ore.

In the case of this DL type sintering machine, the raw material 5 is usually charged on the pallet 1 with a layer thickness of about 500 to 600 mm.
At that time, in the particle size distribution in the raw material deposition layer 5b, coarse particles are segregated in the lower layer portion and fine particles are segregated in the upper layer portion so that the porosity becomes as large as possible. Here, water is usually added to the raw material 5 before being charged on the pallet 1, and a fine powder is produced by a granulation process by rolling the raw material 5 when sliding down on the charging chute 4. It adheres to and aggregates with relatively large particles to improve breathability after charging.

By the way, since the DL type sintering machine is of the downward suction type, the water vaporized in the upper layer portion is cooled and agglomerated in the lower layer portion to impair the air permeability. In addition, the lower layer has a slower cooling rate than the upper layer, so the heat retaining effect is large and the red tropics are enlarged, and the air permeability is significantly impaired. Therefore, in order to improve the productivity, it is necessary to improve the air permeability in the middle and lower layers of the raw material deposition layer 5b.

Therefore, in order to improve the obstruction of the air permeability of the raw material deposited layer, for example, in Japanese Patent Laid-Open No. 61-136637, a gap such as a ventilation rod is provided between the raw material supply device and the ignition furnace. A method of adjusting the air permeability of a raw material deposition layer on a pallet by a forming device has been proposed. However, in this method, since voids are provided in advance in the region where brittle sinter is generated, the brittle sinter becomes more brittle.

In Japanese Patent Laid-Open No. 5-295456, when a raw material is deposited on a pallet in a raw material charging section of a DL type sintering machine, a plurality of air permeability control rods are vertically arranged on the deposited raw material slope. A method of inserting and improving breathability is disclosed. According to this method, any void groove is formed in the lower layer portion that impedes the air permeability of the sintering bed, depending on the insertion depth when the air permeability control rod is inserted almost vertically depending on the raw material circumstances. , Which is said to improve breathability. However, since the breathability control rod is inserted almost vertically and the gap is formed in the front slope of the raw material charging part, the raw material flows into the void at the raw material charging part, so it is expected. It is difficult to obtain a moderate effect. In addition, the cutting of the air-permeable control rod due to wear and the adhesion of dust to the air-permeable control rod hinders the formation of void grooves, and frequent maintenance is required, thus lowering the operating rate.

On the other hand, in Japanese Unexamined Patent Publication (Kokai) No. 2-263935, a plurality of air permeability control rods having one end fixed are palletized from a space between a floor ore sinter and a raw material sinter to a lower layer of a bed layer. It has been disclosed that it is inserted in the direction to improve the air permeability of the lower layer portion of the deposited layer. According to this method, small-diameter holes extending in the pallet advancing direction are formed so as to be scattered in the cross section of the raw material deposition layer, but there is little contribution to improving the air permeability of the lower layer portion. Therefore, in order to increase the effect of improving the air permeability, a large number of air permeability control rods are required, and the deposition of the raw material is greatly disturbed in the raw material ore feeding section, which causes uneven burning or poor strength of the sintered ore.

Further, in Japanese Patent Laid-Open No. 1-202292, a slit-shaped opening is provided in a raw material sliding portion of an inclined chute for receiving the raw material supplied from a surge hopper through a drum feeder, and the slit-shaped opening is dropped through the slit-shaped opening. The raw material and the raw material that does not fall are classified. Then, a device is provided in which, in the falling portion of the raw material charged on the pallet from the tip of the chute without passing through the slit-shaped opening, a plurality of skip bars made of a plurality of rod-shaped bodies arranged parallel to the pallet traveling direction are provided. It is disclosed.

According to this apparatus, the air permeability of the lower layer portion of the raw material deposition layer formed on the pallet is improved by the raw material dropping force relaxing action of the skid rod, but this is not always sufficient, and further improvement of the air permeability is achieved. Was wanted.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides the raw material in the middle and lower layer regions excluding the fragile portion in the upper layer region of the raw material deposition layer loaded on the pallet. It is an object of the present invention to provide a method and an apparatus for producing a sintered ore, in which voids that ensure air permeability are formed without disturbing the deposition of the sinter, thereby achieving a uniform gas flow and air permeability in the raw material deposition layer.

[0011]

In order to achieve the above-mentioned object, the present invention repeatedly conducts various studies on the shape and insertion method of the air-permeable control object in which a void groove is likely to remain in the raw material deposition layer in an offline experiment, and further conducts an experiment using an actual machine. I confirmed the effect.
As a result, in order to form void grooves that tend to remain in the raw material deposition layer, it is necessary to insert a breathable control plate that does not allow wet raw material to adhere to the raw material deposition layer loaded on the pallet from the charging chute. It has been found that there is a remarkable effect in improving the above, and the present invention has been achieved thereby.

The present invention preferably reduces the condensation of water in the lower layer, which is the cause of the air flow obstruction of the raw material deposit layer peculiar to the DL type sintering machine, and allows the air flow control plate to exhibit its effect more sufficiently. It is to propose a method and an apparatus which can improve the air permeability and can perform a stable sintering operation. In order to achieve the above-mentioned object, the present invention according to claim 1 is to provide a bed ore supplied from a bed ore hopper on a pallet floor surface which moves from a raw material supply process of a DL type sintering machine to a sintering process. In the method for producing a sintered ore, the sintering raw material cut out from the raw material feeding hopper by a drum feeder is charged through a charging chute on the floor ore to form a raw material deposit layer. In the width direction of the pallet, a plurality of horizontally arranged air-permeable control plates are placed in the pallet advancing direction, and are inserted into the raw material slope formed on the floor ore hopper side of the raw material deposition layer. A method for producing a sintered ore, comprising forming a plurality of ventilation grooves by cutting in the middle / lower layer portion and then sintering the raw material deposition layer.

According to a second aspect of the present invention, the distance between the breathable control plates is 1.5 to 2.0 times the height of the breathable control plates, and the horizontal depth of the breathable control plates is the lower end of the charging chute. The method for producing a sinter according to claim 1, wherein the sinter is inserted deeper into the mine ore from the position. The invention according to claim 3 is characterized in that the height of the breathability control plate is set to 2/5 to 1/2 of the height of the raw material deposition layer from the pallet floor surface. It is a method of producing mine.

The invention according to claim 4 is characterized in that a heater is embedded in the breathability control plate to prevent the raw material from adhering to the breathability control plate. It is a method for producing a sintered ore. The present invention according to claim 5 provides D
On the pallet floor surface that moves from the raw material supply process to the sintering process of the L-type sintering machine, first spread the bedding ore supplied from the bedding ore hopper by the drum feeder from the raw material supply hopper onto the bedding ore. In a sintered ore manufacturing apparatus in which the cut-out sintering raw material is charged through a charging chute to form a raw material deposition layer, the raw material deposition layer is horizontally arranged at intervals in the width direction of the pallet. A plurality of breathable control plates that are inserted horizontally from the raw material slope formed on the side of the bedding ore hopper,
An apparatus for producing sinter, comprising: a carriage to which the breathability control plate is attached; and a horizontal guide frame that supports the carriage so as to be able to move forward and backward through wheels on an upper portion.

According to a sixth aspect of the present invention, there is provided the apparatus for producing a sintered ore according to the fifth aspect, which comprises an elevating mechanism for the air-permeable control plate. The present invention according to claim 7 provides:
A ventilation plate drive motor arranged on a mine supply support frame supporting the horizontal guide frame, a drive sprocket provided on the ventilation plate drive motor, and a driven sprocket supported via bearings arranged on the horizontal guide frame are connected. Drive chain and a ventilation plate adjusting cylinder that is expanded and contracted by rotation of a drive shaft that supports the driven sprocket. The ventilation plate adjusting cylinder is connected to the carriage through a bearing to move the carriage forward and backward. The apparatus for producing a sintered ore according to claim 5 or 6, further comprising a mechanism.

According to the eighth aspect of the present invention, the elevating mechanism for the air-permeable control plate is provided with a rack vertically arranged on a vertical member constituting an upper portion of the horizontal guide frame, and a pinion meshing with the rack is attached. A vertical guide frame that includes a bearing that supports a certain rotary shaft and guides the vertical member up and down, and a lifting drive device that is connected to one end of the rotary shaft to which the pinion is attached. Item 5 is an apparatus for producing a sintered ore according to item 6 above.

The present invention according to claim 9 is characterized in that a scraper is disposed at one end of the horizontal guide frame so as to be sandwiched in close proximity to both side surfaces of the breathability control plate. It is an apparatus for producing a sintered ore according to item 7 or 8. The present invention according to claim 10 is the apparatus for producing a sintered ore according to claim 5, 6, 8 or 9, characterized in that the air-permeable control plate has a built-in heater.

[0018]

1 and 2 show a ventilation control device for a DL type sintering machine according to an embodiment of the present invention. In addition,
The same components as those of the conventional sintering machine shown in FIG. 13 will be described with the same symbols. In the present invention, the support shaft 6 extending in the width direction of the pallet 1 is provided near the slope 5a of the raw material deposition layer 5b.
The support shaft 6 is arranged so as not to interfere with the raw material deposition layer 5b.
On the other hand, it is movable in the height direction and the traveling direction of the pallet 1. A plurality of breathable control plates 7 are arranged on the support shaft 6 at substantially equal intervals.
Is fixed horizontally, and the support shaft 6 is configured to move up and down and move forward and backward. Then, the support shaft 6 is moved up and down and moved back and forth to move the plurality of air permeability control plates 7 fixed to the support shaft 6 from the raw material slope 5a formed on the side of the bed mine hopper 10 of the raw material deposition layer 5b to the pallet advancement. Direction, the height direction and the horizontal direction insertion depth of the air permeability control plate 7 with respect to the raw material deposition layer 5b are adjusted, and the raw material deposition layer 5b is adjusted according to the adjustment amount.
The ventilation groove 8 is formed in the middle and lower layers by cutting.

As means for moving the plurality of breathability control plates 7 fixed to the support shaft 6 forward and backward and up and down, for example, FIG.
As shown in FIG. 3, the support shaft 6 is fixed to a carriage 15, and the carriage 15 is mounted on a track 13 formed by a horizontal guide frame 16 via a plurality of wheels 12 arranged above the carriage 15 so as to be able to move back and forth. is there. Further, racks 17 are vertically arranged in parallel with each other at both ends of a vertical member 16a constituting the upper part of the horizontal guide frame 16, and a pinion 18 is meshed with each rack 17. The two pinions 18 are fixed to a common rotary shaft 19, and a lifting drive device 20 is connected to one end of the rotary shaft 19. The rotating shaft 19 is rotatably supported by a bearing 21 provided on the vertical guide frame 22.

When the support shaft 6 is moved forward and backward together with the breathability control plate 7, a traveling drive device (not shown) connected to the wheels 12 is provided.
When the wheels 12 are driven to rotate normally or reversely, the carriage 15 travels on the track 13 formed by the horizontal guide frame 16, whereby the breathability control plate 7 moves forward and backward. Further, when ascending / descending, when the elevating / lowering drive device 20 is driven and the pinion 18 is normally or reversely rotated to move the rack 17 in the up / down direction, the vertical member 16a is guided by the vertical guide frame 22 to ascend / descend, whereby the carriage is moved. Support shaft 6 fixed to
The breathability control plate 7 is moved up and down together with the air permeability control plate 7.

The means for moving the breathable control plate 7 back and forth and for moving up and down is not limited to this, and any ordinary means such as a hydraulic cylinder can be arbitrarily adopted. It goes without saying that a human power mechanism by operating the steering wheel can be adopted in some cases. 3 to 6 show DLs used in the present invention.
7 shows another ventilation control device of the die sintering machine. In this embodiment, as shown in FIG. 3, a plurality of breathability control plates 7 are directly fixed at substantially equal intervals in the width direction of the carriage 15, and the carriage 15 is provided with a plurality of wheels 12 arranged above it. It is mounted so that it can travel on the track 13 of the horizontal guide frame 16 via the. Furthermore, the horizontal guide frame 16 is a support stand for the mining section.
Supported by 23. A scraper 24 is provided at the tip of the horizontal guide frame 16 so as to correspond to each breathable control plate 7.

As shown in FIG. 6, this scraper 24 scrapes off the adhering material on the breathable control plate 7 in the vicinity of both side faces of the breathable control plate 7. The carriage 15 has a bifurcated structure with a downward U-shape so as to sandwich the breathable control plate 7 so that the adhered substances can be removed.
When moving forward and backward, the breathability control plate 7 moves, and the adhering matter on the breathability control plate 7 is scraped off by the scraper 24 on the fixed side. In this embodiment, unlike the above-mentioned embodiment,
Since the lifting device for adjusting the height of the air permeability control plate 7 is not provided, the air permeability control plate 7 is inserted at the optimum height of the middle and lower layers of the raw material deposition layer 5b. It is necessary to set the height in advance so that it can be done.

As shown in FIGS. 4 and 5, a ventilation plate driving motor 27 is disposed on the ore feeding section supporting frame 23, and a driving sprocket 28 is attached to the ventilation plate driving motor 27. In addition, a bearing 29 is provided on the lower surface of one end of the horizontal guide frame 16.
And a driven sprocket 31 attached to one end of a drive shaft 30 supported by a bearing 29. The drive sprocket 28 and the driven sprocket 31 are
32, and when the ventilation plate drive motor 27 is driven, the drive sprocket 28 is rotationally driven and the drive chain 32
Since the driven sprocket 31 is rotationally driven via the drive shaft 30, the drive shaft 30 is rotated, and the outer cylinder of the cylinder shaft is rotated by the worm gear or bevel gear incorporated in the ventilation plate adjusting cylinder 33, which causes the ventilation plate adjusting cylinder 33 to move. Telescopic operation.

The tip of the ventilation plate adjusting cylinder 33 is connected to a bearing 34 provided on the upper surface of the other end side of the carriage 15 via a pin 35. The expansion and contraction of the ventilation plate adjusting cylinder 33 causes the carriage 15 to move to the wheels 12. Through the horizontal guide frame 16
It moves back and forth on the orbit 13 formed by. By moving the carriage 15 forward and backward, the breathability control plate 7 is moved to the raw material deposition layer 5b.
The horizontal insertion depth at the set height with respect to the upper and lower layer portions is adjusted, and the desired ventilation groove 8 is formed in the upper and lower layer portions of the raw material deposition layer 5b by the adjustment amount. When the raw material adheres to the breathability control plate 7, the breather plate drive motor 27 is driven to move the carriage 15 forward and backward, so that the scraper 24 scrapes off the deposits on the breathability control plate 7. This scraper 24 can be similarly applied to the above-described embodiment.

According to the present invention, a plurality of breathability control plates 7 inserted in the raw material deposition layer 5b loaded on the pallet 1.
As a result, ventilation grooves 8 having the same height are formed at equal intervals in the width direction of the pallet 1 in the middle and lower layers of the raw material deposition layer 5b. Depending on the case, you may make it arrange | position a some breathability control board 7 up and down in a zigzag pattern. In this case, as shown in FIG. 8, the ventilation grooves 8 are formed in a zigzag shape in the raw material deposition layer 5b.

In the present invention, by forming the ventilation groove 8 in the middle / lower layer portion of the raw material deposition layer 5b, the water vaporized in the upper layer portion of the raw material deposition layer 5b does not condense in the middle / lower layer wet zone. It is easily discharged from the ventilation groove 8. In addition, ventilation groove 8
Due to the presence of, it is possible to alleviate the clogging of the voids by the melt in the melting zone. Due to these two points, forming the ventilation groove 8 improves the air permeability in the raw material deposition layer 5b.

By the way, the shape of the breathability control plate 7 is important. This is because the surface layer portion of the raw material deposition layer 5b has a small drop from the charging chute 4, and therefore the packing density is small and the porosity is large, so that the sintering speed is high and the cooling speed is high because it is the surface layer portion. , Becomes a weak layer with weak strength.
Therefore, if the ventilation groove 8 is further formed in this portion, the quality such as the sintering strength is deteriorated. On the other hand, if the air permeability control plate 7 is low in height, wide in space, and thin in thickness, the effect of improving air permeability is small.

Appropriate air-permeable control plate intervals are as follows. If the height and spacing of the breathability control plates are improper, the raw material between the breathability control plates stagnates due to the side resistance of the breathability control plates when the pallet is moved, and the raw materials are apparently pulled out to the floor mine hopper side. It will be in a state of being. For this reason, the bed thickness apparently increases near the charging chute, and the bed dips later on the mine ore side. As a result, it becomes impossible to form a proper ventilation groove.

Using the following equations (1) to (7) of Janssen, the relationship between the distance D of the breathable control plate and the ratio of (horizontal force / vertical force) is compared for each height H of the breathable control plate. Figure 10 shows. k = Ps / pv = (1-sinφi) / (1 + sinφi) ……… (1) rh = A / U ……… (2) Pe = γB ・ γh / μw ・ K ……… (3) Pv = Pe- (Pe-PO) exp (γB · h / Pe) ………… (4) Ps = k · Pv ………… (5) Fs = Ps · H ………… (6) Fv = Pv · D …… (7) A: sectional area (m ² ), U: peripheral length (m), Pv: vertical pressure (kg / m ² ), Ps: horizontal pressure (kg / m ² ), γh: horizontal radius (m ), Pe: eigenvalue due to friction of wall surface, k: proportional constant (−), φi: internal friction angle (°), γB: apparent specific gravity (kg / m ³ ), PO: upper pressure (kg / m ² ), μw: Coefficient of friction between powder and wall surface (−), H: Height of ventilation plate (m), D:
Interval (m), Fs: horizontal force, Fv: vertical force Forming state of the ventilation groove 8 and amount of movement of raw material between the breathability control plates 7 (the limestone layer is used as a tracer and the limestone layer is removed when the breathability control plate 7 is pulled out). The distance traveled) was investigated in a laboratory, and Fig. 10 shows when the breathable control plate 7 was pulled out (in the actual machine, the breathable control plate was fixed and the raw material moved as the pallet progressed).
In the case where 70% or more of the ventilation groove 8 remains with respect to the cross-sectional area of the breathability control plate 7 and the movement amount of the raw material between the breathability control plates is 5 mm or less, it is indicated by a circle, and in other cases, by a ● mark It was

From FIG. 10, if the ratio of horizontal force / vertical force is 0.3 or less, it is indicated by a circle, which is the height H of the breathability control plate 7.
Is 100 mm, 150 mm, 200 mm, 250 mm and 300 mm, and the distance D is 0.15 m or more and 0.23 m, respectively.
As mentioned above, it has been shown that 0.30 m or more, 0.38 m or more, and 0.45 m or more are sufficient. This indicates that the ventilation groove 8 can be formed without collapsing if the ratio D / H of the distance D to the height H of the ventilation control plate 7 is 1.5 or more.

On the other hand, if the distance D between the breathability control plates 7 is too wide, the number of the ventilation grooves 8 becomes smaller than the width of the pallet 1. FIG. 11 shows the relationship between the interval D of the air-permeable control plate 7 and the production rate of sinter according to the height H of the air-permeable control plate 7. Figure
From 11 the height H of the breathable control plate 7 is 150mm, 200mm, 250m
Distance D corresponding to m and 300 mm respectively
It can be seen that the production rate is good when the values are 300 mm or less, 400 mm or less, 500 mm or less and 600 mm or less. Further, since the layer thickness S of the normal raw material deposition layer 5b is 500 to 600 mm, the ratio of the height H of the air permeability control plate 7 to the layer thickness S,
It can also be seen that the H / S ratio of 200/500 to 300/600, that is, 2/5 to 1/2, maximizes the effect of improving the production rate.

That is, if the distance D is 2.0 times or less with respect to the height H of the air-permeable control plate 7, it shows that the influence on the reduction of the sinter production rate is small. Therefore, the ratio D / H of the distance D to the height H of the breathability control plate 7 is 1.5.
A range of ~ 2.0 is appropriate. Further, in the plate-shaped body constituting the breathability control plate 7, if the thickness is less than 10 mm, the ventilation effect of the obtained ventilation groove is small, and if it exceeds 30 mm, the formed ventilation groove becomes excessive, and the gas flow becomes the ventilation groove. Concentration occurs and uneven burning occurs. Therefore, the thickness of the breathability control plate is 10-30mm
Is appropriate.

When the breathability control plate 7 is inserted into the raw material deposition layer 5b, the raw material adheres to the breathability control plate 7. In particular, in the vicinity of the slope 5a where the raw material flows on the pallet, there is a large amount of adhesion, and if there is a large amount of adhesion of the raw material, the deposition state of the raw material will be greatly disturbed, and uneven burning or poor sintering strength may be promoted. . Therefore, as shown in (a) and (b) of FIG.
By incorporating a heater 9 in the breathability control plate 7 and heating with the heater 9, the adhesion of the raw material is reduced. According to this structure, it is possible to prevent the raw material from adhering to the breathability control plate 7,
In addition, the raw material is dried in the vicinity of the breathability control plate 7 so that the water content can be reduced. Therefore, the adhesion of the raw material can be prevented, and the pressure loss in the wet zone having the largest ventilation resistance can be reduced, and the air permeability can be improved. As the heater 9, for example, an electric heating means is preferably used, but a steam heating means may be used.

[0034]

EXAMPLES The results of implementation of the present invention will be described. That is, the results of productivity, air permeability and quality when sinter was produced with the raw material composition shown in Table 1 and the operating conditions shown in Table 2 were investigated. In this embodiment, the ventilation control device shown in FIGS. 1 and 2 is used, the specifications of the ventilation control plate in Table 3 are used, and the depth of the ventilation control plate in the horizontal direction is discharged from the lower end of the charging chute. It was operated by inserting it up to a position of 100 mm on the part side. The layer thickness S of the raw material deposition layer was 520 mm.

The operation results are shown in FIG. As is clear from FIG. 12, in the lower layer region of the sintering raw material layer, by forming a ventilation groove that does not collapse due to the movement of the pallet,
It was possible to reduce the amount of quick lime used without adversely affecting the yield, and to improve the energy consumption rate significantly by improving productivity.

[0036]

[Table 1]

[0037]

[Table 2]

[0038]

[Table 3]

[0039]

As described above, according to the present invention, ventilation grooves are provided by the ventilation control plate in the middle and lower layers of the raw material deposition layer that obstructs ventilation during sintering to improve ventilation. improves. In addition, since it becomes possible to dry the portion where water vapor agglomerates by the ventilation groove formed in the raw material deposition layer, the air permeability of the lower layer portion can be greatly improved, and the quality of the sintered ore is greatly deteriorated. Productivity can be improved without causing the adherence of the raw material to the breathability control plate, and stable operation can be performed.

Further, by improving the productivity of the sinter, energy efficiency can be improved by reducing the unit of coke and the unit of electric power, and moreover, the expensive quicklime used for improving the air permeability can be reduced. There is also an advantage that the air permeability can be improved simply by providing the existing sintering machine with simple equipment, and it can greatly contribute to the efficient production of the sintered ore.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view showing an embodiment of the present invention.

FIG. 3 is a side view showing another embodiment of the present invention.

FIG. 4 is a side view showing another embodiment of the present invention, showing a state in which the breathability control plate is pulled out.

5 is a view on arrow AA of FIG. 4. FIG.

6 is a view as viewed in the direction of arrows BB in FIG. 4;

FIG. 7 is a cross-sectional view showing a ventilation groove formed by arranging the ventilation control plates according to the present invention in parallel.

FIG. 8 is a cross-sectional view showing a ventilation groove formed by arranging the ventilation control plates according to the present invention in a zigzag pattern.

9A and 9B are schematic explanatory diagrams of a breathability control plate having a heater built therein, where FIG. 9A is a plan view and FIG. 9B is a side view.

FIG. 10 is a graph showing the relationship between the distance D of the breathability control plate and the ratio of horizontal force / vertical force acting on the raw material deposition layer for each height of the breathability control plate.

FIG. 11 is a graph showing the relationship between the interval D of the air-permeable control plates and the production rate of sinter according to the height of the air-permeable control plates.

FIG. 12 is a graph showing changes in the sinter production rate, yield, and quicklime basic unit, comparing the conventional method and the method of the present invention.

FIG. 13 is a sectional view showing a sintering raw material charging device of a conventional example.

[Explanation of symbols]

 1 Pallet 2 Raw material supply hopper 3 Drum feeder 4 Charging chute 5 Raw material (sintering raw material) 6 Support shaft 7 Breathability control plate 8 Ventilation groove 9 Heater 10 Floor ore hopper 11 Floor ore 12 Wheel 13 Track 14 Cutoff Plate 15 Carriage 16 Horizontal guide frame 17 Rack 18 Pinion 19 Rotating shaft 20 Elevating drive 21 Bearing 22 Vertical guide frame 23 Supporting platform for mining section 24 Scraper 25 Drum feeder 26 Bedding chute 27 Vent plate drive motor 28 Drive sprocket 29 Bearing 30 Drive shaft 31 Driven sprocket 32 Drive chain 33 Ventilation plate adjustment cylinder 34 Bearing 35 pins

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoru Ikawa 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Prefectural Institute of Technology Research, Kawasaki Steel (72) Inventor Kenichi Sorimachi 1 Kawasaki-cho, Chuo-ku, Chiba-shi (72) Inventor Akio Yasukawa, Mizushima Kawasaki-dori, Kurashiki-shi, Okayama (72) Inventor Mizushima Works, Kawasaki Steel Co., Ltd. (72) Kenji Takihira, Mizushima-Kawasaki-dori, Kurashiki, Okayama Chome (No house number) Kawasaki Steel Co., Ltd. Mizushima Steel Works

Claims (10)

[Claims] 1. A bedding ore supplied from a bedding ore hopper is laid on a pallet floor moving from a material supply process to a sintering process of a DL type sintering machine, and then a material ore is supplied to the bedding ore. In the method of producing a sintered ore in which the sintering raw material cut out from the hopper with a drum feeder is charged through a charging chute to form a raw material deposition layer, the sintered ore is horizontally arranged at intervals in the width direction of the pallet. Inserted a plurality of air-permeable control plates from the slope of the raw material formed on the floor ore hopper side of the raw material deposition layer toward the pallet advancing direction, and cut a plurality of ventilation grooves in the middle and lower layers of the raw material deposition layer. A method for producing a sintered ore, comprising forming the raw material deposit layer and then sintering the raw material deposit layer. 2. The distance between the breathability control plates is 1.5 to 2.0 times the height of the breathability control plates, and the depth of the breathability control plates in the horizontal direction is deeper from the lower end position of the charging chute to the mine side. The method for producing a sinter according to claim 1, wherein the sinter is inserted. 3. The production of the sintered ore according to claim 1, wherein the height of the air permeability control plate is set to 2/5 to 1/2 of the height of the raw material deposition layer from the pallet floor surface. Method. 4. The method for producing a sintered ore according to claim 1, wherein a heater is embedded in the breathability control plate to prevent the raw material from adhering to the breathability control plate. . 5. The bed ore supplied from a bedding ore hopper is first laid on the pallet floor moving from the material supply process to the sintering process of the DL type sintering machine, and then the material ore is supplied to the bedding ore. In a sintering ore manufacturing device in which a sintering raw material cut out from a hopper by a drum feeder is charged through a charging chute to form a raw material deposition layer, the sintering ore is horizontally arranged with a space in the width direction of the pallet. A plurality of breathable control plates to be inserted horizontally from the raw material slope formed on the bedding ore hopper side of the raw material deposition layer, a carriage to which the breathable control plates are attached, and this carriage via the wheels on the top. An apparatus for producing a sintered ore, comprising: a horizontal guide frame that supports forward and backward movement. 6. The apparatus for producing a sintered ore according to claim 5, further comprising an elevating mechanism for the air-permeable control plate. 7. A ventilation plate drive motor arranged on a mine feed section support frame supporting the horizontal guide frame, a drive sprocket provided on the ventilation plate drive motor, and a bearing arranged on the horizontal guide frame. And a ventilation plate adjusting cylinder that is expanded and contracted by rotation of a drive shaft that supports the driven sprocket. The ventilation plate adjusting cylinder is connected to the carriage via a bearing. 7. The apparatus for producing a sinter according to claim 5, further comprising the carriage forward / backward moving mechanism. 8. A bearing that supports a rack in which the lifting mechanism for the breathability control plate is vertically arranged on a vertical member that constitutes an upper portion of the horizontal guide frame, and a rotary shaft to which a pinion that meshes with the rack is attached. 7. A vertical guide frame, which is provided with a vertical guide frame for guiding the vertical movement of the vertical member, and an elevation drive device connected to one end of a rotary shaft to which the pinion is attached.
Or the manufacturing apparatus of the sintered ore according to 7. 9. The sintering according to claim 5, wherein a scraper is arranged at one end of the horizontal guide frame so as to be sandwiched in close proximity to both side surfaces of the breathability control plate. Ore manufacturing equipment. 10. The apparatus for producing a sintered ore according to claim 5, wherein the breathability control plate has a built-in heater.