JP2018146189A - Sinter ore cooler and powdered ore recovery method - Google Patents

Abstract

[Problem] Accumulate powdered sintered ore (fallen ore) that is blown out of the sliding part on the cooling air leaking from the sliding part of the trough truck and the chamber without scattering, and save a lot of money. To collect fallen ore without labor and to use the collected fallen ore as finished sintered ore. [Solution] A plurality of trough carts move in a connected state on a rail from a sintered ore input port toward an ore discharge section, and a plurality of trough carts are arranged at the bottom of the moving trough cart, and the sintered ore on the moving trough cart is In a sintered ore cooler equipped with a chamber connected by a blower pipe into which cooling air is blown, and a sealing means for sealing the sliding parts of the trough truck and the chamber, the above-mentioned sliding plate is installed on the rail floor outside the rail. A sintered ore cooler characterized in that a scattering prevention plate that suppresses the scattering of powdered sintered ore blown out on cooling air leaking from a moving part is installed in the vicinity of a trough truck. [Selection diagram] 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 by 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, if the seal material 12 is worn, the amount of cooling air that leaks 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 sinter ore cooler, the present invention rides on cooling air leaking from the trough carriage and the sliding portion of the chamber, and blows off the outside of the sliding portion. Grain sintered ore (falling ore) is collected without being scattered, and it is collected without spending a great deal of cost and labor, and the recovered falling ore is used as a product sintered ore. An object of the present invention is to provide a sinter cooler and a method for recovering a granular sinter.

  The present inventors have solved the above problem on the premise that it is difficult to prevent the falling of the falling ore from the sliding part of the trough carriage and the chamber for a long time because the sealing material gradually wears. The method to do was examined earnestly.

  As a result, if a plate-like member that blocks the cooling air leaking from the trough carriage and the sliding portion of the chamber is installed on the rail floor outside the rail on which the trough carriage moves, the cooling air is taken from the sliding portion. It has been found that the falling ore falling off can be prevented and the falling ore accumulated inside the plate-like member can be 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 that move in a connected state from the sinter ore entrance to the discharge section on the rail, and are placed under the moving trough trolleys and cooled to the sintered ore on the moving trough trolleys In a sinter ore cooler comprising a chamber connected by a blower tube for blowing air, and a sealing means for sealing a trough carriage and a sliding portion of the chamber,
On the rail floor outside the rail, a scattering suppression plate that suppresses scattering of the powdered sintered ore that is blown out by cooling air leaking from the sliding portion is provided in the vicinity of the trough carriage. A sinter ore cooler.

  (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) In any one of the above (1) to (3), a recovery unit that recovers the powder sintered ore is provided at a lower portion of the rail floor between the scattering prevention plate and the sliding portion. A sinter ore cooler as described.

  (5) The sintered ore cooler according to (4), wherein the recovery means is a hopper or a belt conveyor.

  (6) The upper part of the trough carriage 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.

(7) On the rails, sinter ore is sequentially introduced from the sinter ore into a plurality of trough trolleys that move in a connected state from the sinter ore entrance to the discharge part. When cooling air is blown into the sintered ore on the moving trough carriage from the chamber arranged by connecting with the blower pipe at the bottom, the trough carriage sealed by the sealing means when cooling the sintered ore and A recovery method for recovering powdered sintered ore that blows out on cooling air leaking from the sliding portion of the chamber,
(I) On the rail floor outside the rail, 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 erected in the vicinity of the trough carriage,
(Ii) A recovery means in which a powdered sintered ore that collides with the scattering prevention plate and accumulates on the rail floor and a powdered sintered ore that collides with the rail and accumulates on the rail floor are arranged at the lower part of the rail floor. A method for recovering a powdered sintered ore characterized by recovering.

  (8) The method for recovering sintered powder ore according to (7), wherein the recovery means is a hopper or 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. Since it can be easily recovered without incurring additional costs and labor, it is possible to increase the utilization rate of the granular sintered ore (falling ore) and to improve the working environment around the cooler.

It is a figure which shows the one aspect | mode of the cooler of an annular type and a lower blowing system. 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”)
Multiple trough trolleys that move in a connected state from the sinter ore entrance to the discharge section on the rail, are placed under the moving trough trolley, and blow cooling air into the sinter on the moving trough trolley In a sintered ore cooler comprising a chamber connected by a blower pipe, and a sealing means for sealing the trough carriage and the sliding portion of the chamber,
On the rail floor outside the rail, a scattering suppression plate that suppresses scattering of the powdered sintered ore that is blown out by cooling air leaking from the sliding portion is provided in the vicinity of the trough carriage. And

The method for recovering the granular sintered ore of the present invention (hereinafter sometimes referred to as “the recovery method of the present invention”)
A plurality of trough carts that move in a connected state from the sinter ore entrance to the discharge section on the rail, sequentially enter the sinter from the sinter entrance and below the moving trough cart, When cooling air is blown into a sintered ore on a moving trough carriage from a chamber connected by a blower pipe to cool the sintered ore, the trough carriage sealed by the sealing means and the chamber slide. A recovery method for recovering powdered sintered ore that blows out on cooling air leaking from a moving part,
(I) On the rail floor outside the rail, 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 erected in the vicinity of the trough carriage,
(Ii) A recovery means in which a powdered sintered ore that collides with the scattering prevention plate and accumulates on the rail floor and a powdered sintered ore that collides with the rail and accumulates on the rail floor are arranged at the lower part of the rail floor. It collects.

  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 the same as the cross-sectional structure shown in FIG. 2 (A-B cross-sectional structure of the cooler shown in FIG. 1), and the same constituent members and parts as shown in FIG. The same reference numerals or numbers as those in FIG. 2 are attached to the parts, but the cross-sectional structure shown in FIG. 3 is also a cross-sectional structure common to the cooler of the lower blowing type, so the following explanation These are explanations relating to the cross-sectional structure of the 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 suppression plate 15 is erected in the vicinity of the trough carriage 1 is substantially different from the conventional cooler (see FIG. 2), and is a feature of the cooler of the present invention.

  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 is disposed at the lower part of the rail floor from the recovery hole 14a. It drops and accumulates on collection means (not shown) such as a hopper and a belt conveyor, and is collected as appropriate.

  Thus, by providing the scattering suppression plate 15 on the rail floor 14 on the outer side of the rail 2, it rides on the cooling air leaking from the sliding portion A of the trough carriage 1 and the chamber 3, and outside the sliding portion A. While preventing the falling falling ore 10c from scattering into the atmosphere, the falling ore 10c is collected and collected in the gap between the vertical wall 3a of the chamber 3 and the rail 2 and the gap between the rail 2 and the scattering prevention plate 15. Therefore, recovery of the falling ore 10c can be easily performed without requiring a great deal of cost and labor.

  FIG. 3 shows a mode in which the scattering suppression plate 15 is erected vertically to the rail floor 14, but the scattering suppression plate 15 blocks cooling air leaking from the trough carriage 1 and the sliding portion A of the chamber 3. As long as it fulfills the function to perform, it is not limited to a specific standing mode and shape. For example, the scattering prevention plate 15 may stand upright at an angle with respect to the trough carriage 1, or may have a shape in which a tip portion is curved or bent with respect to the trough carriage 1.

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

  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. It can be easily collected without enormous costs and labor, so it is possible to increase the utilization rate of powdered sintered ore (falling ore) and improve the working environment around the cooler it can. 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 Sealing material 13 Falling-out fall pipe 14 Rail floor 14a Recovery hole 15 Spattering suppression board A Sliding part

Claims (8)

Multiple trough trolleys that move in a connected state from the sinter ore entrance to the discharge section on the rail, are placed under the moving trough trolley, and blow cooling air into the sinter on the moving trough trolley In a sintered ore cooler comprising a chamber connected by a blower pipe, and a sealing means for sealing the trough carriage and the sliding portion of the chamber,
On the rail floor outside the rail, a scattering suppression plate that suppresses scattering of the powdered sintered ore that is blown out by cooling air leaking from the sliding portion is provided in the vicinity of the trough carriage. A sinter ore cooler.   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 sintering according to any one of claims 1 to 3, further comprising a recovery means for recovering the granular sintered ore at a lower portion of the rail floor between the scattering prevention plate and the sliding portion. Ore cooling machine.   The sintered ore cooler according to claim 4, wherein the recovery means is a hopper or a belt conveyor.   The upper part of the said trough cart 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 1-5 characterized by the above-mentioned. Ore cooling machine. A plurality of trough carts that move in a connected state from the sinter ore entrance to the discharge section on the rail, sequentially enter the sinter from the sinter entrance and below the moving trough cart, When cooling air is blown into a sintered ore on a moving trough carriage from a chamber connected by a blower pipe to cool the sintered ore, the trough carriage sealed by the sealing means and the chamber slide. A recovery method for recovering powdered sintered ore that blows out on cooling air leaking from a moving part,
(I) On the rail floor outside the rail, 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 erected in the vicinity of the trough carriage,
(Ii) A recovery means in which a powdered sintered ore that collides with the scattering prevention plate and accumulates on the rail floor and a powdered sintered ore that collides with the rail and accumulates on the rail floor are arranged at the lower part of the rail floor. A method for recovering a powdered sintered ore characterized by recovering.   The said collection | recovery means is a hopper or a belt conveyor, The collection method of the granular sintered ore of Claim 7 characterized by the above-mentioned.

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