JP4714469B2 - Dust collector for sintering charging equipment - Google Patents

Description

The present invention relates to a dust collector for a sinter charging device, which is used in a Dwytroid type sintering machine and collects dust generated when a sintering raw material is charged onto a sintering pallet of the sintering machine. .

Conventionally, in a Dwytroid type sintering machine, a raw material is charged onto an endless chain-shaped sintering pallet by a charging device, and a surface layer portion of the charged raw material layer is ignited in an ignition furnace, and a window is formed. The air above the sintering material layer is sucked downward by a wind exhauster through the box (see, for example, Patent Document 1).
As a result, as the sintering pallet moves, the powder coke blended in the sintering raw material burns, and sintering is performed sequentially from the upper layer part to the lower layer part of the sintering raw material layer to produce a sintered ore. The sintered ore is discharged from the discharge section.

JP-A-11-351756 (FIGS. 1 to 3)

However, since the sintering raw material also includes a fine powder raw material, when the sintering raw material is charged onto the sintering pallet via the charging device, dust is generated and the working environment is deteriorated. was there.
In order to collect dust, it may be possible to install a dust collector equipped with a power source in the sintering machine. However, when the sintering machine is in operation, it must be operated at all times, which increases the running cost and is not economical. . Moreover, when installing such a dust collector in a sintering machine, the installation space of a power source is needed, for example, and there exists a possibility that work space may become narrow.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a dust collector for a sintered charging apparatus that can economically collect dust without requiring a power source.

The dust collector for a sinter charging device according to the present invention that meets the above object includes a charging device for charging a sintering raw material onto a sintering pallet, and the sintering raw material charged on the sintering pallet. In an apparatus for collecting dust generated in the charging device, used in a Dwytroid-type sintering machine having an ignition furnace that ignites,
A first gas blowing nozzle provided above a gap formed between an upstream chute and a downstream chute for charging the sintering raw material onto the sintering pallet; and a lower portion of the downstream chute A dust collecting hood for collecting the dust generated by the charging device having a second gas blowing nozzle provided on the dust collecting hood is provided between the charging device and the ignition furnace and collected by the dust collecting hood. A discharge hood is provided for supplying the dust onto the surface layer of the sintering raw material on the downstream side of the ignition furnace.

Moreover, in the dust collector for a sintering charge apparatus according to the present invention, the position where the opening of the discharge hood is provided is the sintering raw material charged on the sintering pallet on the downstream side of the ignition furnace. It is preferable that the flame remains within 100 mm from the upper layer.

In the dust collector for a sintered charging apparatus according to the present invention, it is preferable that the dust collecting hood is open toward the charging apparatus.

Furthermore, in the dust collector for a sintering charging apparatus according to the present invention, it is preferable that a gap between the lower end of the opening of the discharge hood and the upper end of both side walls of the sintering pallet is 30 mm or less.

The dust collector for a sintered charging apparatus according to the present invention is used in a dwy-toroid type sintering machine, and a dust collecting hood for collecting dust generated in the charging apparatus is provided between the charging apparatus and the ignition furnace. Since there is an exhaust hood that supplies dust collected by the dust collection hood on the surface of the sintering material on the downstream side of the ignition furnace, there is no need for a power source. Due to the suction action, dust can be recovered economically through the dust collection hood.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is an explanatory view of the dust collector for a sintering charge apparatus according to the first embodiment of the present invention, and FIG. 2 is an exhaust hood according to a modification of the dust collection apparatus for the sintering charge apparatus. FIG. 3 is an explanatory view of a dust collector for a sintered charging apparatus according to a second embodiment of the present invention.

As shown in FIG. 1, a dust collector for a sintering charge apparatus (hereinafter also simply referred to as a dust collector) 10 according to a first embodiment of the present invention uses an endless chain sintering of a sintering raw material. A charging device 12 charged on the pallet 11, an ignition furnace 13 for igniting the sintering raw material charged on the sintering pallet 11, a point below the sintering pallet 11 and directly under the ignition furnace 13 An apparatus for use in a dweroid-type sintering machine 14 having a plurality of windboxes 15 to 18 provided up to an exhausting section (not shown) arranged on the downstream side of the furnace 13. 12 is a device that collects the dust generated at 12.
The dust collector 10 will be described after describing the Dwightroid-type sintering machine 14 that uses the dust collector 10 for a sintered charging apparatus according to the first embodiment of the present invention.

As shown in FIG. 1, the dwelloid-type sintering machine 14 is located above the sintering pallet 11 by a wind exhauster (not shown) through a plurality of window boxes 15 to 18 arranged below the sintering pallet 11. This is a lower suction type sintering machine that sequentially sinters the sintering raw material layer charged on the sintering pallet 11 from the upper layer portion to the lower layer portion by sucking the air in the downward direction. A dead plate 19 is installed below the sintering pallet 11 at a portion where the suction action from the exhaust fan is unnecessary.
The charging device 12 provided in the sintering machine 14 includes an upstream chute 22 for charging the sintered raw material cut out from the drum feeder 21 onto the sintering pallet 11, and a gap between the upstream chute 22 and the upstream chute 22. And a downstream chute 24 disposed with opening 23.

A first gas blowing nozzle 25 is provided above the gap 23 formed between the upstream chute 22 and the downstream chute 24 and tries to jump from the upstream chute 22 toward the downstream chute 24. A gas is blown against the sintered raw material to separate the fine and fine sintered raw materials from other sintered raw materials, that is, coarse-grained sintered raw materials. Further, a second gas spray nozzle 26 is provided at the lower part of the downstream chute 24, and gas is sprayed from the lateral direction to the fine and fine sintered raw material falling from the gap 23 to sinter the fine particles. The raw material is separated from the fine sintered raw material.
For this reason, dust in the sintering material is scattered in the air by the gas blown from the first and second gas blowing nozzles 25 and 26, and the dust is collected by the dust collector 10.

As shown in FIG. 1, the dust collector 10 includes a dust collection hood 27 disposed on the upstream side of the ignition furnace 13 and above the sintering pallet 11, and a downstream side of the ignition furnace 13 on the sintering pallet. 11 and a discharge hood 29 connected to the dust collection hood 27 via a connection duct 28.
The dust collection hood 27 is provided with an opening 30 at its upstream end, that is, at its front end, so that the opening 30 is positioned in the gas blowing direction of the second gas blowing nozzle 26 of the charging device 12. That is, it arrange | positions so that it may open toward the gas spray nozzle 26. FIG. Here, the inner width of the opening 30 of the dust collection hood 27 is preferably approximately the same as the width of the sintered pallet 11, but if the dust can be collected, it is longer or shorter than the width of the sintered pallet 11. It doesn't matter.

One end of a connection duct 28 is connected to the upper part on the downstream side of the dust collection hood 27, and the upper part on the upstream side of the discharge hood 29 is connected to the other end.
The discharge hood 29 is provided with an opening 31 on the lower side, and the discharge hood 29 covers the sintered pallet 11 in the width direction. The installation position of the discharge hood 29, that is, the arrangement position of the opening 31 is within 100 mm (preferably within 70 mm, more preferably from the upper layer of the sintering raw material charged on the sintering pallet 11 on the downstream side of the ignition furnace 13. Is a region L where the fire type remains within 50 mm), for example, a range of 10 m (8 m in the present embodiment) downstream from the ignition furnace 13.
Thereby, the dust discharged | emitted from the discharge | emission hood 29 is combusted on the sintering pallet 11, for example, without performing a special post-process.

The inner width of the opening 31 of the discharge hood 29 is preferably approximately the same as the width of the sintered pallet 11, but may be longer or shorter than the width of the sintered pallet 11.
In addition, by setting the gap D1 between the lower end of the opening 31 of the discharge hood 29 and the upper ends of both side walls 32 of the sintering pallet 11 to 30 mm or less (preferably 25 mm or less, more preferably 20 mm or less), The suction action from each of the wind boxes 16 and 17 arranged in the can be used more remarkably.
Here, in order to smoothly convey the dust to the discharge hood 29, it is preferable to suppress and further prevent dust accumulation in the connection duct 28. Therefore, a compressed air sprayer is installed in the connection duct 28. The dust accumulated in the connection duct 28 can be blown off to the discharge hood 29 side.

As shown in FIG. 2, skirt portions 33 and 34 may be provided on the lower end portion of the discharge hood 29 a and on both sides in the width direction. Thereby, for example, the lower end position on both sides in the width direction of the discharge hood 29a and the both side walls of the sintering pallet 11 without bringing the lower end portion of the discharge hood 29a into contact with the sintering raw material charged on the sintering pallet 11 The gap D2 with respect to the upper end position of 32 can be made narrower than the gap D1 (for example, 15 mm or less, preferably 10 mm or less). The inner width of the opening 31a of the discharge hood 29a is substantially the same as the width of the sintered pallet 11, but may be slightly longer or shorter than the width of the sintered pallet 11.
In this way, by providing the skirt portions 33 and 34 on the discharge hood 29a, the gap formed between the discharge hood 29a and the sintering pallet 11 can be reduced. Leakage can be further suppressed.

Then, the usage method of the dust collector 10 for sintering charging apparatuses which concerns on the 1st Embodiment of this invention is demonstrated.
First, the exhaust fan is started and the conveyance of the sintered pallet 11 is started. Here, the suction flow rate of the air sucked through the wind boxes 16 and 17 below the discharge hood 29 by the wind exhauster is the air of the first and second gas blowing nozzles 25 and 26 of the charging device 12. For example, it is about 10 times the total flow rate.
As a result, the air above the wind boxes 16 and 17 is sucked into the wind boxes 16 and 17, so that an air flow from the charging device 12 through the dust collection hood 27 to the discharge hood 29 is formed. Is done.
Then, a predetermined amount of the sintered raw material is cut out from the drum feeder 21 to the charging device 12.

The sintered raw material cut out to the charging device 12 is in a state where air is blown from the first and second gas blowing nozzles 25 and 26 of the charging device 12 so that dust (dust) is easily scattered.
However, the scattered dust is collected in the dust collection hood 27 through the opening 30 and then sent to the discharge hood 29 through the connection duct 28 by the air flow formed in the dust collector 10. The material is supplied from the opening 31 of the discharge hood 29 onto the surface of the sintered raw material.
Here, since the arrangement position of the opening 31 of the discharge hood 29 is the region L in which the flame remains within 100 mm from the upper layer of the sintering raw material, the discharge hood 29 was discharged from the upper surface of the sintering raw material layer. It is preferable because dust can be combusted.
As described above, when producing the sintered ore, dust generated in the charging device 12 can be continuously processed without requiring a power source.

Next, a dust collector for a sintering charge apparatus (hereinafter also simply referred to as a dust collector) 40 according to a second embodiment of the present invention shown in FIG. 3 will be described. Since only the configuration of the dust collecting hood 41 is different from the dust collector 10 for a sintered charging device according to the embodiment, the same members are denoted by the same reference numerals and detailed description thereof is omitted. In addition, the charging device 43 of the dwelloid type sintering machine 42 using the dust collecting device 40 is a chute in which the upstream chute 22 and the downstream chute 24 of the charging device 12 are continuously integrated. 44, and the first and second gas blowing nozzles 25 and 26 are not provided.

The dust collection hood 41 of the dust collector 40 covers the entire charging device 43 and the sintered material discharge port 45 of the drum feeder 21. For this reason, the inner width of the dust collection hood 41 only needs to be wide enough to cover at least the charging device 43.
The dust collection hood 41 may be configured to partially cover only the dust generation portion of the charging device 43 because there is no problem as long as the dust collecting hood 41 can collect dust generated from the charging device 43. It is. One end of the connection duct 46 is connected to the upper part on the downstream side of the dust collection hood 41, and the other end of the connection duct 46 is connected to the upper part on the upstream side of the discharge hood 29.
Thereby, the dust discharged | emitted from the discharge | emission hood 29 is combusted on the sintering pallet 11, for example, without performing a special post-process.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, a case where the dust collector for a sintered charging apparatus of the present invention is configured by combining some or all of the above-described embodiments and modifications is also included in the scope of the right of the present invention.
In the second embodiment, the dust collecting apparatus having the dust collecting hood that covers the entire charging apparatus having the integrated chute has been described. Of course, it is also possible to cover the entire charging device in which the chute and the downstream chute are separated.

It is explanatory drawing of the dust collector for sintering charging devices which concerns on the 1st Embodiment of this invention. It is explanatory drawing of the discharge | emission hood which concerns on the modification of the dust collector for the said sintering charging device. It is explanatory drawing of the dust collector for sintering charging devices which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

10: Dust collector for sintering charging device, 11: Sintering pallet, 12: Charging device, 13: Ignition furnace, 14: Sintering machine, 15-18: Wind box, 19: Dead plate, 21: Drum Feeder, 22: upstream chute, 23: gap, 24: downstream chute, 25: first gas blowing nozzle, 26: second gas blowing nozzle, 27: dust collecting hood, 28: connection duct, 29, 29a : Discharge hood, 30, 31, 31a: Opening, 32: Side wall, 33, 34: Skirt, 40: Dust collector for sintering charging device, 41: Dust collecting hood, 42: Sintering machine, 43: Charger, 44: Chute, 45: Sintering material outlet, 46: Connection duct

Claims (4)

Used for a Dwytroid type sintering machine having a charging device for charging a sintering raw material onto a sintering pallet and an ignition furnace for igniting the sintering raw material charged on the sintering pallet; In the device for collecting dust generated in the charging device,
A first gas blowing nozzle provided above a gap formed between an upstream chute and a downstream chute for charging the sintering raw material onto the sintering pallet; and a lower portion of the downstream chute A dust collecting hood for collecting the dust generated by the charging device having a second gas blowing nozzle provided on the dust collecting hood is provided between the charging device and the ignition furnace and collected by the dust collecting hood. A dust collector for a sintering charge device, comprising a discharge hood for supplying the dust onto the surface layer surface of the sintering raw material downstream of the ignition furnace. The dust collector for a sintering charging apparatus according to claim 1, wherein the opening of the discharge hood is provided at a position downstream of the ignition furnace of the sintering raw material charged on the sintering pallet. A dust collector for a sinter charge device, characterized in that it is a region in which fire species remain within 100 mm from the upper layer. 3. The dust collector for a sintered charging device according to claim 1, wherein the dust collecting hood is open toward the charging device. 4. Dust collector for equipment. The dust collector for a sintering charging apparatus according to any one of claims 1 to 3 , wherein a gap between the lower end of the opening of the discharge hood and the upper end of both side walls of the sintering pallet is set to 30 mm or less. A dust collector for a sintered charging device.

Images