KR101049970B1 - Leakage of air prevention apparatus of sintering cat jointing part - Google Patents

Abstract

PURPOSE: A device for preventing the air leakage of a sintering trailer is provided to save replacement cost of wear plates on sintering trailers and prevent sintering failure by fundamentally preventing the generation of air leakage between the sintering trailers. CONSTITUTION: A wear plate(30) is as follows. A first plate member is installed on facing sides of sintering trailers and supports a sidewall. A position, on which a second plate member(35) is coupled to the first plate member, is controlled by a position fixing unit(40). The second plate member consists of a material, which is stronger than the first plate member. When the second plate member makes contact with the wear plate of neighboring sintering trailers, the second plate member makes less abrasion than the first plate member.

Description

Leakage of air prevention apparatus of sintering cat jointing part}

The present invention relates to a sintered cart of the present invention, and more particularly, to a sintered trolley having an improved wear plate capable of preventing a leak.

In general, in the operation of blast furnaces in steel mills, when the ferrous iron ore is directly charged into the blast furnace, the flow of reducing gas in the blast furnace is not smooth, resulting in a yellowing defect during blast furnace operation, thereby reducing the amount of blast furnace output. Therefore, in the operation of blast furnaces, such iron ore needs to be bulky ore with an appropriate size, for example, about 5 mm to 50 mm in diameter, to smooth the flow of reducing gas and to facilitate blast furnace charging. The process of agglomeration of iron ore is called iron ore sintering process.

On the other hand, such a sintering process uses a continuous iron ore sintering machine having a sinter bogie moving in the form of Dwight-Lloyd (DL), that is, an endless track. Here, the sintered trolley is provided with side walls on both sides, and grate is installed for combustion of the raw material layer in the longitudinal direction thereof.

In the production of sintered ore using these sintered bogies, a mixture of sintered raw iron ore, subsidiary limestone and fuel coke is charged into a continuous sintered bogie moving through the charging chute in an endless track, and the raw material layer The upper part is ignited.

Then, the air is sucked from the upper part of the raw material layer to the lower part by using the air inhaler under the moving sintering cart so that the raw material layer can be burned. When complete combustion is made to the lower part of the raw material layer laminated on the sintered trolley, the sintering operation of the raw material layer is terminated, and only the agglomerated sintered ore remains on the sintered trolley. After the sintered trolley on the caterpillar is moved to distribute the sintered ore in the light distribution unit, the empty sintered trolley moves along the rail, and the raw material is charged from the charging chute again, and the sintering process undergoes the combustion step continuously.

In the above process, the volume is condensed while the spectroscopy is made of sintered ore, and the side wall of the trolley for the sintering machine is discontinuous, so that the concentration of O ₂ is increased by external air, so that the crack dislocation from the discontinuous gap area to the top of the surface layer part. Poor firing defect, crack recovery part, 50% of ground unstable due to the unstable ground, the recovery rate decreases due to the increase in the amount of semi-light. Cause problems such as increase. In particular, the wear plate installed between the sintered trolleys blocks the leakage between the sintered trolleys, and the sintered trolleys have a problem in that the sintered trolleys are easily worn due to friction while moving in an endless track.

In order to prevent this, the wear plate has been periodically replaced. However, such wear plate replacement requires a lot of cost and work time, and thus cannot improve operating efficiency.

On the other hand, Korean Utility Model Registration No. 093757 discloses a leak prevention apparatus for the side wall of a sintered trolley | bogie. The disclosed leak prevention apparatus has a configuration in which the side plate is fixed with bolts to be able to adjust the left and right positions of the main body constituting the sintering machine trolley, and a stacking jaw corresponding to each other is formed on the contact portion of the side plate.

The leak-tight blocking device blocks the leak by installing a side plate on the sintered trolley, but can not completely block the leak by the side plate, there is a problem that the interference occurs when moving the sintered trolley on the track.

The registered utility model No. 034231 discloses a technical configuration in which a sealant is attached to a leak-producing part on the side of a vehicle using a magnet, and the registered utility model No. 0295760 discloses a leakproof device for a double hopper for a sintering machine. In addition, registered utility model No. 0159521 discloses a leak prevention between the sidewalls of a sintering machine trolley | bogie. The leak prevention apparatus is provided with a leakage suppression plate which is a magnet at one edge of the side wall, and the leakage suppression plate is sized to cover the edge of the side wall on which it is installed and the other side wall adjacent to the side wall.

The leakage blocking device configured as described above has a separate magnet for fixing, but the sintered trolley is not easy to attach the leakage blocking plate from contamination.

Patent Publication No. 2003-002552 discloses a leak preventing device for a sintering machine balance, and Patent No. 0121541 discloses a sintered ore manufacturing method.

The present invention as described above is to solve the above problems, it is possible to fundamentally reduce the occurrence of leakage caused by the wear plate, to provide a leak prevention device of the sintered truck easy to repair and maintenance There is this.

Another object of the present invention is to provide a leak prevention device of the sintered trolley which can minimize the occurrence of wear of a specific portion of the wear plate and is partially replaceable.

Still another object of the present invention is to provide a leak prevention apparatus for a sintered trolley which can reduce friction and increase a sealing effect by reducing a contact surface of a wear plate for preventing leakage between sintered trolleys.

Leakage preventing device of the sintered trolley of the present invention for achieving the above object is provided on the side wall is installed on both sides of the sintered bogie moving along the rail, the sintered bogie frame on the same axis of the side edges of the side wall of the sintered bogie frame It is equipped with a wear plate to block leakage of air between,

The wear plate is installed on opposite sides of the sintered trolleys, the first plate member for supporting the side wall, the first plate member and the position fixing position controlled by the position fixing limitation portion is made of a material stronger than the first plate member And a second plate member having less wear than the first plate member in friction contact with the wear plate of the adjacent sintered trolley.

In the present invention, the position fixing limit portion is installed on the surface of the first plate member and the second plate member opposite to each other, the first projections and the first coupling grooves are formed in the first plate member, the second The plate member is provided with a second coupling groove and a second projection coupled to the first projection and the first coupling groove, respectively.

The second plate member includes a growth layer made of stainless steel in the base substrate. The second plate member is formed on the surface of the base substrate by thermal spray coating using a thermal spraying metal made of C, Mn, Si, P, S, Cr, Ni, Mo, and Cu.

In addition, a plurality of closed partition grooves are formed on the upper surface of the second plate member, and a sealing portion is formed on the upper edge of the second plate member.

The present invention can fundamentally prevent the leakage of air between the sintered trolleys to prevent the sintering failure, and furthermore, it is possible to reduce the cost of replacing the wear plate installed in the sintered trolley. In particular, the contact area between the wear plates can be reduced to reduce wear due to friction.

1 is an exploded perspective view showing a sintered trolley, showing a state in which a wear plate is installed;
2 and 3 is an exploded perspective view showing a state in which the wear plate is installed in the sintered trolley,
4 is a front view showing a state in which the first and second plates constituting the wear plate are coupled by the position fixing limiting part.
5 is a front view showing another embodiment of the wear plate,
6 is a cross-sectional view of the wear plate,
7 is a front view showing another embodiment of the wear plate,
8 is a cross-sectional view of the wear plate,
9 is a front view showing another embodiment of the wear plate,
10 is a cross-sectional view of the wear plate,
11 is a front view showing another embodiment of the wear plate,
12 is a cross-sectional view of the wear plate,
13 is a perspective view showing another embodiment of a wear plate installed in the sintering cart,
14 is a cross-sectional view of the wear plate shown in FIG.
15 is a perspective view showing another embodiment of the wear plate,
16 is a cross-sectional view of the wear plate shown in FIG.

Leakage preventing device of the sintered trolley according to the present invention is to fundamentally prevent the leakage of air by a wear plate installed on the mutually opposite surfaces of the sintered trolley, an embodiment thereof is shown in Figures 1 and 2 .

Referring to the drawings, the sintering machine 10 is for massizing the iron ore to the appropriate size to facilitate the blast furnace charging while smoothing the flow of reducing gas during blast furnace operation, the sintering carts 20 are interconnected Infinite orbit. The wear plate 30, which is a leakage preventing unit, is installed between the sintered trolleys 20. 1 and 2, the wear plate 30 is installed on opposite sides of the sintered trolleys and is fixed to the first plate member 31 and the first plate member 31 to support the side walls. The engagement position is controlled by the limiting portion 40 and is made of a material having a stronger strength than the first plate member 31, and thus has less wear than the first plate member 31 in friction contact with the wear plate of the adjacent sintered trolley. The plate member 35 is provided. The members 31 and 35 of the first and second plates of the wear plate may be formed of a single body.

The wear plate 30 may have a somewhat different shape depending on the sintering cart 20 as shown in FIGS. 2 and 3. That is, there may be a slight difference depending on the area blocking the leakage air contact with each other of the sintered cart.

The position fixing limiting portion 40 defining the mutually engaging positions of the first and second plate members 31 and 35 constituting the wear plate 30 is the first plate member 31 and the second plate member 35. The first projections 41 and the first coupling grooves 42 are formed in the first plate member 31, and the first plates 41 and the first coupling grooves 42 are formed on opposite surfaces of the first plate member 31. The second coupling groove 43 and the second projection 44 which are respectively coupled to the protrusion 41 and the first coupling groove 42 are formed. The position fixing limiting part 40 is not limited to the above-described embodiment, and any structure may be used as long as it can define a coupling position of the first and second plate members 31 and 35. For example, as shown in FIG. 4, the position fixing part 40 has a dovetail-shaped groove 45 formed at one side of the first plate member 31, and corresponds to the second plate member 35. Dovetail-shaped protrusions 46 may be formed. The first and second plate members 31 and 35 may be provided by joining two members to each other, as shown in FIGS. 5 to 12. In this case, the joined portion becomes a position fixing limiting part.

On the other hand, the second plate member 35 formed stronger than the first plate member 31 includes a growth layer made of stainless steel in the base substrate portion. The second plate member 35 may include a thermal spray coating layer formed on the surface of the base substrate by thermal spray coating using a thermal spray metal made of C, Mn, Si, P, S, Cr, Ni, Mo, and Cu. The growth layer formed on the surface of the second plate member 35 may be formed using a 13% Cr-4% Ni-Mo stainless steel electrode in which molybdenum is mixed with 13% chromium and 4% nickel. The second plate member 35 formed stronger than the first plate member 31 may be heat-treated to the base member to which an auxiliary plate having a relatively stronger strength than the first plate member 31 is attached.

Meanwhile, as shown in FIG. 13, the second plate member 35 has a plurality of partition grooves 36 closed on the top surface thereof to reduce surface area, and a sealing part (at the top edge of the second plate member 35). 37) is formed. The partition groove 36 is formed to reduce the frictional contact area between the wear plates provided to face the adjacent sintering trucks, and the wear plate 30 forming one closed curve of the partition groove is formed. In addition, the sealing part 37 may be continuously formed along the edge of the second plate member 35, and a plurality of sealing parts 37 may be installed from the center to the edge (see FIG. 15). At this time, the sealing portion 37 may be made of a synthetic resin material, a flame retardant resin.

In addition, the first and second plate members 31 and 35 are formed with through holes for fixing them by using mutually opposing bolts of the bogie, which are formed in multiple stages so that the head of the bolt does not protrude.

On the other hand, the wear plate may be formed of a single plate, in this case, a growth layer or a spray coating layer corresponding to the second plate of the embodiment may be formed.

Leakage blocking device of the sintered trolley according to the present invention configured as described above is charged with a mixture of sintered raw iron ore as a raw material limestone and fuel coke in the state in which the sintered trolley is connected and moved in an endless track, Ignition will promote massification.

In this process, the wear plate 30 installed between the sintered trolleys 20 is worn by friction with each other. The wear phenomenon of the wear plate varies depending on the frictional part and the position of the connection portion interconnecting the sintered trolley, the installation position of the wear plate of the sintered trolley, and the wear plate 30 according to the present invention is relatively bad wear Since the growth layer or the spray coating layer using stainless is formed on the second plate member 35, which may be, wear of the wear plate may be reduced.

The wear prevention of the second plate member 35 may reduce the sintering defects at the connection sites of the sintered carts by the outside air flows in between the two sintered carts.

In addition, when a specific portion of the wear plate 10 is worn out, the second plate member 34 among the plate members having a high wear among the first and second plate members 30 coupled to each other by the position fixing unit 40 is worn. Is separated from the first plate member 30, and the second plate member 34 to be exchanged is combined with the first plate member. In this process, the first protrusion 41 and the first coupling groove 42 are formed in the first plate member, and the first protrusion 41 and the first coupling groove (in the second plate member 35 to be replaced). Since the second coupling grooves 43 and the second projections 44 are respectively coupled to 42, the coupling positions of the second plate members 35 with respect to the first plate member 31 can be defined by combining them. have.

In particular, since the partition grooves 36 are formed in the second plate member 35, the contact area between the wear plate members can be reduced to reduce wear, and at the edge of the second plate member, a sealing part for maintaining airtightness ( Since 37) is provided, it is possible to fundamentally prevent the leakage of air through the parts in close contact with the wear plate.

As described above, it is installed between the sintered trolleys of the present invention to prevent abrasion due to mutual frictional contact, and at the time of abrasion, a part of abrasion that is severely worn may be smoothly exchanged.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

The present invention can be widely applied as a sealing device for a site where high heat is generated as well as a sintering cart of iron ore.

30; Wear plate
31; First plate member
35; Second plate member
40; Position fixation limit

Claims (5)

It has a side wall is installed on both sides of the sinter bogie moving along the rail, and a wear plate is installed on the same axis of both edges of the side wall to block leakage between the side walls of the sinter bogie,
The wear plate is installed on opposite sides of the sintered trolleys, the first plate member for supporting the side wall, the first plate member and the position fixing position controlled by the position fixing limitation portion is made of a material stronger than the first plate member And a second plate member having less wear than the first plate member in friction contact with the wear plate of the adjacent sintered trolley,
The position fixing limit portion is installed on the surface opposite to the first plate member and the second plate member, the first projections and the first coupling grooves are formed in the first plate member, the second plate member A second coupling groove and a second projection are coupled to the first projection and the first coupling groove, respectively;
The second plate member is formed with a plurality of closed partition grooves for reducing the friction force, the second plate member is a leakage preventing device using a sintered trolley, characterized in that the sealing member is formed continuously along the edge. delete The method of claim 1,
The second plate member is a sintered cart, characterized in that formed on the base substrate by a stainless steel layer or a thermal spray coating layer using a thermal spray metal made of C, Mn, Si, P, S, Cr, Ni, Mo, and Cu. Leakage prevention device using.


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