JP2018146191A - Sinter ore cooling machine and recovery method for granular sinter ore - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a recovery of a granular sinter ore blown out and dispersed out of a trough bogie without expending much cost and labor.SOLUTION: A sinter ore cooling machine comprising trough bogies moved on rails under their connected state, chambers arranged below the rails and connected by blower pipes to blow-in cooling air to the sinter ores on the bogies, sealing means fixed at upper end parts of the chambers in such a way that they can be replaced to seal the trough bogies and the sliding part of each of the chambers, and transfer means fixed at lower end parts of the chambers to transfer the granular sinter ores dropped from the trough bogies into the chambers and collected there is constituted in such a way that slant plates are arranged between end parts of the rail floor and the transfer means, dispersion restricting plates for restricting dispersion of granular sinter ores blown out of the sliding part while being placed on cooling air leaked from the sliding part are vertically installed near the trough bogie and the rail floor is provided with recovery holes where the granular sinter ores struck to the dispersion restricting plates and accumulated there and the granular sinter ores struck against the rails and collected there are dropped.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cooler that cools a sintered ore and a method for recovering the granular sintered ore that blows out from the cooler.

  Conventionally, in blast furnace operation, sintered ore obtained by sintering sintered raw materials such as iron ore powder, limestone, and powder coke with a sintering machine (for example, DL type sintering machine) is used as the main blast furnace raw material. However, since the sintered ore discharged from the sintering machine is in a high temperature state of 500 to 600 ° C., the cooling machine adjacent to the sintering machine can be transported by a belt conveyor or the like, for example, up to about 100 ° C. Cooling.

  As cooling methods, there are an upper suction method in which cooling air is sucked from the upper part by a blower and sucked through the sintered ore, and a lower blowing method in which cooling air is blown into the sintered ore by a blower from the lower part and cooled. The types of the cooler are roughly classified into an annular type and a linear type.

  FIG. 1 shows an embodiment of an annular, lower blowing type cooler.

  In the cooler shown in FIG. 1, a plurality of trough carts 1 on which sintered ore is placed on a grid-like bottom plate are connected and arranged on a rail floor 14 attached to a vertical wall 3 a of a chamber 3. It is arranged on the rail 2 so as to be movable by wheels 1a (see “clockwise dotted line” in the figure), and cooling air is blown into the sintered ore from the bottom of the trough carriage 1 to the lower part of the annular rail 2 The chamber 3 is connected and arranged by the blower pipe 4.

  The trough carriage 1 is provided with an exhaust cylinder 5 for exhausting the cooling exhaust air that has passed through the sintered ore (see “two-dot chain line” in the figure), and a hood cover 6 that covers the trough carriage 1 is disposed in the chamber 3. A dust conveyor (not shown) that conveys the powdered ore that has fallen into the chamber 3 is disposed in a lower part of the chamber surrounded by a dust conveyor casing 7.

  The sinter discharged from the sinter 10 is sequentially introduced into the trough cart 1 from the sinter inlet 8 of the cooler, and the trough cart 1 makes one round to the discharge section 9 (“clockwise” in the figure). The belt conveyor is cooled to about 100 ° C. with cooling air blown from the chamber 3 through the bottom plate of the trough carriage 1 and transports the sintered ore to the next process in the discharge section 9 (not shown). Exhausted on top.

  As shown in FIG. 1, in a cooler that cools a sintered ore on a trough cart by blowing cooling air from below, in order to cool the sintered ore efficiently, a moving trough cart and a fixed arrangement are arranged. In order to prevent cooling air from leaking from the sliding portion of the chamber, it is necessary to sufficiently secure the airtightness of the sliding portion using a sealing means.

  FIG. 2 shows an A-B cross-sectional structure of the cooler shown in FIG. In the trough carriage 1, the wheel 1 a attached to the support member 11 rolls on the rail 2 arranged on the rail floor 14 attached to the vertical wall 3 a of the chamber 3, and the ore excavation part (see “9” in FIG. 1). )

  During the movement of the trough carriage 1, the cooling air blown into the chamber from the blower pipe 4 passes through the sintered ore 1 a placed on the lattice-like bottom plate of the trough carriage 1 (“upward 2” in the figure). The sinter 10a is cooled.

  During this cooling, the moving support member 11 and the sliding portion A of the fixedly arranged chamber 3 are sealed with a replaceable sealing material 12, but a part of the cooling air leaks from the sliding portion A. However, when the seal member 12 is worn, the amount of cooling air leaking to the outside increases.

  While the trough bogie 1 is moving, a granular sintered ore (hereinafter sometimes referred to as “falling”) 10b falls from the bottom of the trough bogie 1 in a lattice shape. 3, descends along the inclined wall 3 b of the chamber 3, reaches the falling dropping tube 13, and is collected by a dust conveyor (not shown) in the dust conveyor casing 7.

  On the other hand, the lightweight falling ore 10c rides on the cooling air leaking from the support member 11 and the sliding portion A of the chamber 3 fixedly arranged, and blows out to the outside of the sliding portion A, and the vertical wall 3a of the chamber 3 and the rail 2 accumulates between the wheels 1a and blows to the outside of the rail 2 and scatters. And collection | recovery of the fallen ore and the collection | recovery of the fallen fallen ore require great expense and labor.

  This also applies to the cooler of the lower blow type, in which the cross-sectional structure of the cooler is the same as that of the cross-sectional structure AB shown in FIG.

  Therefore, it is important to ensure airtightness in the sliding portion between the trough carriage and the chamber, and many techniques for ensuring the airtightness of the sliding portion have been proposed so far (for example, Patent Document 1). ~ 6).

  For example, Patent Document 6 discloses a sealing device for a sintered ore cooler that cools a sintered ore in a moving cooling trough by blowing a cooling gas into the cooling trough from an air chamber installed below the cooling trough. In addition, a flexible elastic plate-like body that is taller than the gap and long in the moving direction of the cooling trough is interposed in the gap between the lower surface of the seal plate installed at the lower edge of the cooling trough and the upper edge of the air chamber. The lower end of the flexible elastic plate is fixed to the air chamber side, and the cross section of the flexible elastic plate is curved so that the plate surface of the flexible elastic plate is on the lower surface of the seal plate. A sealing apparatus for a sinter ore cooler has been proposed in which a plate-like rubber material containing magnet powder is used as the flexible elastic plate-like body when contacting.

  However, even if the sliding part of the trough carriage and the chamber is sealed with a sealing material, the sealing material gradually wears out, so it is not possible to prevent leakage of cooling air from the sliding part. It is difficult to prevent blowout of falling ore falling on cooling air.

  After all, in the cooler of the lower blowing type, regardless of the type, if the amount of falling ore blown out on the cooling air leaking from the sliding part of the trough cart and the chamber is reduced, the sliding part It is necessary to frequently replace the sealing material that seals, and it takes a great deal of cost and labor to collect the falling ore that has been blown out by cooling air on the outside of the sliding part. What is needed is the current situation.

JP 58-077753 A Japanese Utility Model Publication No. 61-044199 Japanese Patent Laid-Open No. 62-242785 Japanese Utility Model Publication No. 02-048796 Japanese Patent Laid-Open No. 08-247660 JP 2009-066871 A

  Therefore, in view of the above-mentioned present situation related to the lower blow type sintered ore cooler, the present invention allows the powder sintered ore (falling ore) blown out and scattered from the trough cart to be scattered outside the cooler system. The sinter ore cooler solves the problem by collecting the collected ore without collecting a large amount of money and labor, and reusing the recovered fallen ore as a product sintered ore. It aims at providing the recovery method of a grain sintered ore.

  In order to solve the above-mentioned problems, it is necessary to examine measures against falling ore falling out of the system of the cooler on the cooling air leaking from the sliding part of the trough carriage and the chamber, the present inventors, Since the sealing material that seals the sliding parts of the trough carriage and the chamber gradually wears, it is difficult for the falling ore to ride on the cooling air leaking from the sliding parts and blow out to the outside of the sliding parts. Based on the premise that it is difficult to suppress over a period of time, we have intensively studied methods for solving the above problems.

  As a result, a plate-like member that blocks cooling air leaking from the trough carriage and the sliding portion of the chamber is erected at the end of the rail floor of the rail on which the trough carriage moves, and the end of the rail floor and the chamber If the conveying means at the lower end of the plate is connected with a metal plate, it is possible to suppress the scattering of falling ore falling on the cooling air from the sliding part, and the falling ore deposited on the rail floor inside the plate-like member, Along with falling ore falling down in the chamber and accumulating on the conveying means, it has been found that it can be efficiently and easily recovered without much cost and labor.

  This invention was made | formed based on the said knowledge, and the summary is as follows.

(1) A plurality of trough trolleys moving on the rail from the sinter inlet to the discharge section in a connected state, cooling air is blown into the sinter on the moving trough trolley disposed at the lower part of the rail. A chamber connected by a blower tube, a replaceable attachment to the upper end of the chamber, a sealing means for sealing the trough carriage and the sliding portion of the chamber, and a lower end of the chamber, and the chamber from the trough carriage to the chamber In a sinter ore cooler equipped with a conveying means for conveying a granular sintered ore that falls and accumulates therein,
Between the end of the rail floor of the rail and the transfer means, an inclined plate is provided along the inclined wall of the chamber,
At the end of the rail floor or in the vicinity of the end, a scattering suppression plate that suppresses the scattering of the powdered sintered ore that is blown out by the cooling air leaking from the sliding portion is installed in the vicinity of the trough carriage. And
The rail floor is provided with a powder sintered ore that collides with the scattering prevention plate and accumulates on the rail floor, and a recovery hole through which the powder sintered ore that collides with the rail and accumulates on the rail floor falls. A sinter cooler characterized by comprising:

  (2) The sinter ore cooler according to (1), wherein the scattering suppression plate is divided and provided for each sliding portion from which the powdered sintered ore blows.

  (3) The sintered ore cooler according to (1) or (2), wherein a shape of a front end portion of the scattering prevention plate is curved or bent toward a trough carriage.

  (4) The upper part of the trough bogie is covered with a hood cover including an exhaust pipe for exhausting the cooling exhaust air that has passed through the sintered ore. A sinter ore cooler as described.

(5) On the rails, in a connected state, sinter ore is sequentially introduced from the sinter ore into multiple trough trolleys that move from the sinter ore entrance to the discharge part. Cooling air is blown into the sintered ore on the moving trough carriage from the chamber that has a sealing means for sealing the sliding part of the trough carriage and the chamber at the upper end, and connected by a blower tube, and sintered. When cooling the ore, it is a recovery method for recovering the powdered sintered ore falling into the chamber from the trough carriage, and the powdered sintered ore that blows out on the cooling air leaking from the sliding part,
Inclined along the inclined wall of the chamber between the end of the rail floor of the rail and the conveying means that collects and conveys the sintered powder ore falling from the trough carriage into the chamber, attached to the lower end of the chamber A board,
At the end of the rail floor or in the vicinity of the end, a scattering suppression plate for suppressing the scattering of the powdered sintered ore that is blown out by the cooling air leaking from the sliding portion is provided in the vicinity of the trough carriage. And
The rail floor is provided with a powdered sintered ore that collides with the scattering prevention plate and accumulates on the rail floor, and a recovery hole from which the powder sintered ore that collides with the rail and accumulates on the rail floor falls,
Powder sintered ore falling from the dropping hole is accumulated on the conveying means attached to the lower end portion of the chamber with the inclined plate, dropped into the chamber from the trough carriage, and accumulated on the conveying means. A method for recovering powdered sintered ore, comprising collecting together with sintered ore.

  (6) The method for recovering powdered sintered ore according to (5), wherein the conveying means includes a belt conveyor.

  According to the present invention, the powdered sintered ore (falling ore) that blows on the cooling air leaking from the sliding portion of the trough carriage and the chamber and blows out to the outside of the sliding portion is accumulated without being scattered. Can be efficiently and easily recovered without incurring significant costs and labor, and can increase the utilization rate of powdered sintered ore (falling ore) and greatly improve the working environment around the cooler be able to.

It is a figure which shows the one aspect | mode of the cooler of an annular type and a lower blowing type. It is a figure which shows the AB sectional structure of the cooler shown in FIG. It is a figure which shows the cross-section of the cooler of the sintered ore of this invention.

The sinter ore cooler of the present invention (hereinafter sometimes referred to as “the present invention cooler”)
A plurality of trough trolleys that move from the sinter ore entrance to the discharge section in a connected state on the rail, a blow pipe that is arranged at the bottom of the rail and blows cooling air into the sinter on the moving trough trolley The chamber connected in the above, attached to the upper end of the chamber in a replaceable manner, sealing means for sealing the trough carriage and the sliding part of the chamber, and attached to the lower end of the chamber and dropped from the trough carriage into the chamber In the sinter ore cooler equipped with a conveying means for conveying the granular sintered ore to be accumulated,
Between the end of the rail floor of the rail and the transfer means, an inclined plate is provided along the inclined wall of the chamber,
At the end of the rail floor or in the vicinity of the end, a scattering suppression plate that suppresses the scattering of the powdered sintered ore that is blown out by the cooling air leaking from the sliding portion is installed in the vicinity of the trough carriage. And
The rail floor is provided with a powder sintered ore that collides with the scattering prevention plate and accumulates on the rail floor, and a recovery hole through which the powder sintered ore that collides with the rail and accumulates on the rail floor falls. It is characterized by being.

The method for recovering the granular sintered ore of the present invention (hereinafter sometimes referred to as “the recovery method of the present invention”)
On the rails, in a connected state, sinter ore is sequentially introduced from the sinter ore into a plurality of trough carts that move from the sinter ore entrance to the discharge section, Cooling is blown into the sintered ore on the moving trough carriage from the chamber that has the sealing means for sealing the sliding part of the trough carriage and the chamber at the upper end. When collecting the powdered sintered ore falling into the chamber from the trough cart, and a recovery method of collecting the powdered sintered ore that blows off the cooling air leaking from the sliding portion,
Inclined along the inclined wall of the chamber between the end of the rail floor of the rail and the conveying means that collects and conveys the sintered powder ore falling from the trough carriage into the chamber, attached to the lower end of the chamber A board,
At the end of the rail floor or in the vicinity of the end, a scattering suppression plate for suppressing the scattering of the powdered sintered ore that is blown out by the cooling air leaking from the sliding portion is provided in the vicinity of the trough carriage. And
The rail floor is provided with a powdered sintered ore that collides with the scattering prevention plate and accumulates on the rail floor, and a recovery hole from which the powder sintered ore that collides with the rail and accumulates on the rail floor falls,
Powder sintered ore falling from the dropping hole is accumulated on the conveying means attached to the lower end portion of the chamber with the inclined plate, dropped into the chamber from the trough carriage, and accumulated on the conveying means. It is characterized by being collected together with the sintered ore.

  Hereinafter, the cooler of the present invention and the recovery method of the present invention will be described with reference to the drawings.

  FIG. 3 shows a cross-sectional structure of the sintered ore cooler of the present invention. The cooling device of the present invention and the recovery method of the present invention are mainly suitable for cooling the sintered ore sintered by the DL type sintering machine, but the sintered ore is sintered ore sintered by the DL type sintering machine. However, the present invention can be applied to cooling of sintered ore sintered with another sintering machine.

  The cross-sectional structure shown in FIG. 3 is basically based on the cross-sectional structure shown in FIG. 2 (A-B cross-sectional structure of the cooler shown in FIG. 1). The same reference numerals or numbers as those in FIG. 2 are attached to the same constituent members / parts, but the cross-sectional structure shown in FIG. 3 is also a cross-sectional structure common to the lower blow type cooler, The following description relates to a cross-sectional structure of a lower blowing type cooler regardless of the type.

  In the cross-sectional structure shown in FIG. 3, cooling air leaked from the sliding portion A of the trough carriage 1 and the chamber 3 on the rail floor 14 outside the rail 2 on which the trough carriage 1 moves (“sliding portions on both sides in the figure”). A scattering suppression plate 15 that blocks the falling of the falling ore that is blown by cooling air from the sliding portion is provided in the vicinity of the trough carriage 1.

  The point that the scattering prevention plate 15 is erected in the vicinity of the trough carriage 1 is substantially different from the conventional cooler (see FIG. 2), and the features of the cooler of the present invention and the recovery method of the present invention are characteristic. One.

  The scattering prevention plate 15 may be erected over the entire circumference of the sliding part A of the trough carriage 1 and the chamber 3, or may be erected separately for each sliding part from which falling ore blows off.

  Part of the falling ore 10c that blows off the cooling air leaked from the support member 11 of the trough carriage 1 and the sliding portion A of the chamber 3 and blows to the outside of the sliding portion A collides with the rail 2, and the chamber 3 The falling ore 10c that is accumulated between the vertical wall 3a and the rail 2 and blows to the outside of the rail 2 from between the wheels 1a collides with the scattering suppression plate 15 and is between the rail 2 and the scattering suppression plate 14. Accumulate.

  Since the rail floor 14 is provided with a recovery hole 14a for recovering the deposited falling ore 10c, the falling ore 10c accumulated on the rail floor 14 falls from the recovery hole 14a.

  A dust conveyor casing 7 (conveying means) including a dust conveyor (not shown) is attached to the lower end of the chamber 3, and the chamber 3 is inclined between the end of the rail floor 14 and the dust conveyor casing 7. Since the metal inclined plate 16 is attached along the wall 3a, the falling ore 10c dropped from the recovery hole 14a of the rail floor 14 descends along the inclined plate 16, and the dust in the dust conveyor casing 7 is removed. Deposit on the conveyor.

  While the trough carriage 1 is moving, it is relatively heavy among the falling ore 10b falling from the bottom of the trough carriage 1 and cooled by cooling air leaked from the sliding portion A of the trough carriage 1 and the chamber 3. The falling ore 10d not blown out of the machine descends in the chamber 3, reaches the falling ore fall pipe 13 along the inclined wall 3b of the chamber 3 and passes through the falling ore fall pipe 13 in the dust conveyor casing 7. Deposit on the dust conveyor.

  As described above, in the cooler of the present invention and the recovery method of the present invention, during the movement of the trough carriage 1, falling ore falling from the lattice-shaped bottom of the trough carriage 1 (the falling ore falling out of the chamber and the inside of the chamber 3). The falling ore falling 10d) can be collected by a conveyor belt arranged at the lower end of the chamber 3, and the falling ore 10d can be collected together without being scattered outside the system of the cooler. This point is also a feature of the cooler of the present invention and the recovery method of the present invention.

  Therefore, according to the cooling machine of the present invention and the recovery method of the present invention, the falling ore 10b can be efficiently and easily recovered without requiring a great deal of cost and labor, and the working environment around the cooling machine. Can be greatly improved.

  FIG. 3 shows a mode in which the scattering prevention plate 15 is erected vertically to the end portion of the rail floor 14. However, the scattering prevention plate 15 is cooled to leak from the sliding portion A of the trough carriage 1 and the chamber 3. What is necessary is just to perform the function which interrupts | blocks a wind, and as long as it is not limited to a specific standing aspect and shape. For example, the scattering prevention plate 15 may be erected in the vicinity of the end portion of the rail floor 14, may be erected obliquely with respect to the trough carriage 1, and the tip end portion thereof is with respect to the trough trolley 1. It may have a curved or bent shape.

  Further, the scattering prevention plate 15 is usually a metal plate, but is preferably light enough to be easily removed by a single operator, and has a standing manner and shape so as not to interfere during maintenance and inspection of the cooling machine. design.

  Next, examples of the present invention will be described. The conditions in the examples are one example of conditions used for confirming the feasibility and effects of the present invention, and the present invention is based on this one example of conditions. It is not limited. The present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.

Example 1
Conventionally, ore fall of about 120 t / month has occurred, and a large amount of cost and labor have been required for its treatment, but the sintered ore was cooled by an annular type cooling machine having a cross-sectional structure shown in FIG. It was possible to easily recover the falling ore generated at 120 t / month without requiring a large amount of cost and labor. Moreover, since about 60 t / month of 120 t / month was recovered as a product sintered ore having a size of 5 mm or more on the sieve, the utilization rate of falling ore was improved.

  As described above, according to the present invention, the powdered sintered ore (falling ore) blown to the outside of the sliding portion on the cooling air leaking from the sliding portion of the trough carriage and the chamber is not scattered. Can be efficiently and easily recovered without much cost and labor, increasing the utilization rate of powdered sintered ore (falling ore) and increasing the working environment around the cooler Can be improved. Therefore, the present invention has high applicability in the steel industry.

DESCRIPTION OF SYMBOLS 1 Trough cart 1a Wheel 2 Rail 3 Chamber 3a Vertical wall 3b Inclined wall 4 Blower pipe 5 Exhaust pipe 6 Hood cover 7 Dust conveyor casing 8 Sinter ore inlet 9 Exhaust part 10 Sintering machine 10a Sinter ore 10b, 10c, 10d falling ore (powdered ore)
DESCRIPTION OF SYMBOLS 11 Support member 12 Seal material 13 Falling-out fall pipe 14 Rail floor 14a Recovery hole 15 Spattering suppression plate 16 Inclined plate A Sliding part

Claims (6)

A plurality of trough trolleys that move from the sinter ore entrance to the discharge section in a connected state on the rail, a blow pipe that is arranged at the bottom of the rail and blows cooling air into the sinter on the moving trough trolley The chamber connected in the above, attached to the upper end of the chamber in a replaceable manner, sealing means for sealing the trough carriage and the sliding part of the chamber, and attached to the lower end of the chamber and dropped from the trough carriage into the chamber In the sinter ore cooler equipped with a conveying means for conveying the granular sintered ore to be accumulated,
Between the end of the rail floor of the rail and the transport means, an inclined plate is provided along the inclined wall of the chamber,
At the end of the rail floor or in the vicinity of the end, a scattering suppression plate that suppresses the scattering of the powdered sintered ore that is blown out by the cooling air leaking from the sliding portion is installed in the vicinity of the trough carriage. And
The rail floor is provided with a powder sintered ore that collides with the scattering prevention plate and accumulates on the rail floor, and a recovery hole through which the powder sintered ore that collides with the rail and accumulates on the rail floor falls. A sinter cooler characterized by comprising:   2. The sinter cooler according to claim 1, wherein the scattering suppression plate is erected separately for each sliding portion from which the granular sintered ore is blown.   The sinter ore cooler according to claim 1 or 2, wherein the shape of the front end portion of the scattering prevention plate is curved or bent toward the trough carriage.   The upper part of the said trough trolley is covered with the hood cover provided with the exhaust pipe which exhausts the cooling exhaust wind which passed the sintered ore, The sintering of any one of Claims 1-3 characterized by the above-mentioned. Ore cooling machine. On the rails, in a connected state, sinter ore is sequentially introduced from the sinter ore into multiple trough trolleys that move from the sinter ore entrance to the discharge section, and connected to the lower part of the rail with a blower pipe. Then, cooling air is blown into the sintered ore on the moving trough cart from the chamber having the sealing means for sealing the sliding portion of the trough cart and the chamber at the upper end portion to cool the sintered ore. At this time, a method for recovering the powdered sintered ore falling into the chamber from the trough carriage and the powdered sintered ore that blows out on the cooling air leaking from the sliding portion,
Inclined along the inclined wall of the chamber between the end of the rail floor of the rail and the conveying means that collects and conveys the sintered powder ore falling from the trough carriage into the chamber, attached to the lower end of the chamber A board,
At the end of the rail floor or in the vicinity of the end, a scattering suppression plate for suppressing the scattering of the powdered sintered ore that is blown out by the cooling air leaking from the sliding portion is provided in the vicinity of the trough carriage. And
The rail floor is provided with a powdered sintered ore that collides with the scattering prevention plate and accumulates on the rail floor, and a recovery hole from which the powder sintered ore that collides with the rail and accumulates on the rail floor falls,
Powder sintered ore falling from the dropping hole is accumulated on the conveying means attached to the lower end portion of the chamber with the inclined plate, dropped into the chamber from the trough carriage, and accumulated on the conveying means. A method for recovering powdered sintered ore, comprising collecting together with sintered ore.   6. The method for recovering sintered powder ore according to claim 5, wherein the conveying means includes a belt conveyor.

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