KR20040054969A - A device for controlling the ore uniformity outlet of storage bin in furnace - Google Patents

Abstract

PURPOSE: A device for controlling ore uniformity outlet of storage bin is provided to control discharge rate of ore per grain size position to discharge to uniformed grain sizes small grain of central part of the bin and large grain of wall part of the bin in which ore dropped into upper part of the bin from tripper car is accumulated by drop trajectory. CONSTITUTION: The device(1) comprises a rectification pipe(30) having reverse cone shaped cross section arranged in an inner space of the storage bin(10) so that small grain sized ore accumulated in central part of the storage bin and large grain sized ore accumulated in wall part of the storage bin are guided to a uniformed discharge rate through discharge port of the storage bin; and supporting parts for fixing the rectification pipe to the inner space of the storage bin, wherein the rectification pipe is arranged at a tapered part(19) in which a discharge path of ore stored in the storage bin is getting narrowed as it goes from an upper side to a side of the discharge port, wherein the rectification pipe is formed of a hollow pipe member having reverse cone shaped cross section which has an outer surface parallel to a wall part of the tapered part of the storage bin, wherein a plural ring shaped catching projections are mounted on the inner and outer circumferential surfaces of the rectification pipe to generate friction resistance with small grain sized ore discharged to a lower side with being contacted with the inner and outer circumferential surfaces of the rectification pipe, and wherein at least two or more of the supporting parts are installed between the storage bin and the rectification pipe with the supporting parts are formed of supporting rods(41) having a certain length both ends of which are connected between first flange(41a) installed at the wall part of the storage bin and second flange(41b) installed on the outer circumferential surface of the rectification pipe.

Description

A DEVICE FOR CONTROLLING THE ORE UNIFORMITY OUTLET OF STORAGE BIN IN FURNACE}

The present invention relates to a device for adjusting the discharge of the raw light stored in the raw material storage tank of the blast furnace to a uniform particle size, and more specifically, the granules of the central portion in which the raw light falling into the upper storage tank from the tripper car segregated by the drop trajectory; The present invention relates to a raw material uniform particle size emission control device of a raw material storage tank capable of adjusting a discharge speed for each particle size location to discharge a wall of the particle to a uniform particle size.

Figure 1 is a schematic diagram showing the raw material in the raw material storage tank of the blast furnace installation, as shown, the sintered ore produced in the sintering process, the previous step of the blast furnace process is eight raw material storage tank ( 10) is continuously distributed and stored, and the subsidiary materials are distributed and stored in the subsidiary material storage tank 19 disposed between the raw material storage tank (10).

At this time, as a means for charging and storing the raw material of the sintered ore into the upper portion of the raw material storage tank 10, a tripper (20) to which the raw light is transported and dropped through the belt conveyor 21 is used. 20 is a raw material ore while checking the loading amount automatically in accordance with the ore level in the raw material storage tank 10 while moving along the running rail (not shown) installed on the top to # 1 ~ # 8 raw material storage tank 10 Will be

In addition, the raw ore and the subsidiary materials stored in the raw material storage tank 10 and the secondary raw material storage tank 19 are supplied into the particle size selector 13 or the weighing hopper 14 to select the size of the particle size and transfer to a post process or measure the weight to quantitatively. It is transferred to the thicker process.

Meanwhile, in the process of drop-loading the raw light into the upper portion of the raw material storage tank 10 as the tripper 20, the raw light stored in the raw material storage tank 10 is drop-loaded and the loading height of the wall portion is different from the center portion. Differently, the trajectory itself of the raw ore is high and low, and it is grained on the other cross-section, and the opposing ore is stored on the wall side and the small ore is stacked on the center.

In addition, the raw ore is stored differently from the position of the ore and the small ore, and the raw light stored on the mountain cross section is the particle size selector 13 when opening the outlet 12 by opening operation of the gate 11 installed under the raw material storage tank 10. The order of discharge will be different.

3 is a schematic view showing the discharge sequence of the raw material segregated in the conventional raw material storage tank, as shown, the raw light is discharged in the state that the small ore and the opposing ore is segregated in the center of the raw material storage tank 10 The order in which the outlet 12 is opened by the opening operation of the gate 11 is to be discharged in the order of opposing ores from the small ore to the wall of the central portion.

Due to this discharge process, since the discharge speed of the opposing ore integrated in the wall is relatively slow compared to the discharge speed of the small ore particles in the center of the raw material storage tank 10, the discharge through the discharge port 12 is delayed. As a result, solidification occurs due to condensation of the sticking powder remaining on the wall.

In the blast furnace operation, the particle size and uniformity of coke as fuel and sintered ore as the main raw material directly affect the air permeability in the blast furnace, and if the particle size is unevenly charged in the blast furnace operation where fuel and raw materials are continuously charged into the furnace, As a result of this deterioration, continuous operation becomes unstable, leading to problems such as a decrease in productivity.

In the case of the sintered ore, as the particles are attached to the wall of the raw material storage tank 10 and fixed, the storage volume of the storage tank is reduced by reducing the internal volume of the raw material storage tank 10.

Accordingly, in the related art, since the inside of the raw material storage tank 10 must be completely emptied periodically, and the powdered matter stuck to the wall must be manually removed, the operation is interrupted during the removal operation, thereby reducing the work productivity and the burden on the worker. There was a growing problem.

Therefore, the present invention has been proposed in order to solve the conventional problems as described above, the object of which is to suppress the discharge rate of the small raw material light segregated in the center of the reservoir to suppress the discharge of the initial particle size and the relative segregation on the wall It is intended to provide a raw material uniform particle size emission control device of the raw material storage tank that can discharge the raw material segregated in the raw material storage tank to a uniform particle size from the beginning to the end of the raw material light discharge by inducing the discharge speed of the particle size.

1 is a schematic diagram showing the raw light extraction operation in the raw material storage tank of the blast furnace equipment,

2 is a working state for discharging raw light to the particle size sorter from the conventional raw material storage tank,

Figure 3 is a schematic diagram showing the discharge sequence of the raw material segregation in the conventional raw material storage tank,

Figure 4 is a plan view showing a raw material light uniform particle size emission control device of the raw material storage tank according to the present invention,

5 is a front view showing a raw material light uniform particle size emission adjusting device of a raw material storage tank according to the present invention;

6 is a side view showing a raw material light uniform particle size emission adjusting device of a raw material storage tank according to the present invention;

Figure 7 (a) (b) is a block diagram showing a support portion employed in the raw material uniform particle size emission control device of the raw material storage tank according to the present invention,

8 is a graph showing the correlation between the raw material light emission in the raw material storage tank employing the apparatus of the present invention and the raw material particle size size and discharge time in the raw material discharge of the conventional raw material storage tank.

Explanation of symbols on the main parts of the drawings

10 ..... Raw material storage 11 ..... Gate

12 ..... Outlet 19 ..... Taper

20 ..... Tripperka 30 ..... Rectifier

31,32 ... ring-shaped locking jaw 40 ..... support

41 ..... Support rod 42,45 ... 1st, 2nd connection bar

43 ..... Adapter 44 ..... Adjustment bar

As a technical configuration for achieving the above object, the present invention,

In the raw material storage tank for dropping the raw material light into the inside from the tripper car located in the height, and discharges the stored raw light to the bottom,

A rectifying tube on an inverted conical section disposed in the inner space of the raw material storage tank such that the small ore particle integrated in the center of the raw material storage tank and the allied ore loaded on the wall portion are guided at a uniform discharge rate through the discharge port of the raw material storage tank;

By providing the rectifying pipe fixed to the inner space of the raw material storage tank; by providing a raw material uniform particle size emission control device for the raw material storage tank comprising a.

Hereinafter, the present invention will be described in more detail.

Figure 4 is a plan view showing a raw material light uniform particle size emission control device of the raw material storage tank according to the present invention, Figure 5 is a front view showing a raw material light uniform particle size emission control apparatus of the raw material storage tank according to the present invention, Figure 6 Figure 7 is a side view showing a raw material uniform particle size emission control device of the raw material storage tank according to the invention, Figure 7 (a) (b) is a configuration showing a support portion employed in the raw material uniform particle size emission control apparatus of the raw material storage tank according to the present invention. It is also.

As shown in Figs. 4 to 7, the apparatus 1 of the present invention is provided in the inner space in which the raw material light is dropped into and stored from the tripper car 20 located at the height, and the small ore is highly integrated in the center. This device (1) suppresses the discharge of the initial small ore so as to uniformly discharge at a uniform discharge rate through the discharge port 12, and to induce a discharge rate of the relative allele size relatively fast. ) Is composed of a rectifying pipe 30 and the support (40).

That is, the rectifying pipe 30 is a raw material storage tank 10 is a raw material light is dropped into the tank from the tripper 20, the small ore is stored high in the center, the opposing ore is stored low in the wall portion and the raw light is stored on the mountain cross-section (10) It is a hollow tubular member on a truncated inverted conical section disposed within.

In addition, the rectifying pipe 30 for inducing a small ore, which is integrated in the central portion of the raw material storage tank 10 and the opposing ore that is integrated in the wall portion, to the discharge port 12 side of the raw material storage tank 10 at a uniform discharge speed is the raw material storage tank. The raw material light discharge path stored in (10) is disposed in the taper portion 19 which starts to narrow toward the discharge outlet 12 side.

In addition, the rectifying pipe 30 is a hollow tube member on the reverse conical section having an outer surface parallel to the wall portion of the tapered portion 19 of the raw material storage tank 10 so that the discharge flow of the opposing ore is made smoothly from the upper side to the lower side. It is preferable that it consists of.

The rectifier tube 30 is composed of a reverse conical section formed with a smaller outer diameter size of the lower than the outer diameter size of the upper portion so as to narrow the discharge path from the top to the lower, the upper outer diameter of the rectifying tube 30 is 3 compared to the lower outer diameter It is preferably configured to a size of 4 to 4 times, the height of the rectifying pipe 30 is 1/3 of the upper outer diameter size.

In addition, the inner and outer circumferential surfaces of the rectifying pipe 30 are respectively provided with a plurality of annular hooking jaws 31 and 32 so as to generate frictional resistance with the small ore particles discharged downward.

On the other hand, the support portion 40 is a means for positioning the rectification pipe 30 in the internal space of the raw material storage tank 10, the support portion 40 is a first flange (installed on the wall portion of the raw material storage tank 10 ( 41a) and a support rod 41 having a predetermined length connected at both ends between the second planer 41b installed on the outer circumferential surface of the rectifying pipe 30 to at least 2 between the raw material storage tank 10 and the rectifying pipe 30. More than one are installed.

At this time, the support rod 41 is preferably made of a wear-resistant material to prevent abrasion by long-term raw light flow friction.

As shown in FIG. 7 (a), the support bar 41 has a first connection bar 42 having one end connected to the first flange 41a so as to change the position of the rectifying pipe 40, Adapter 43 having one end of the female threaded portion 43a screwed to the male threaded portion of the first connecting bar 42, and the adapter 43 is the number of the screwed to the female threaded portion 43b formed on the other end The first and second female bars 45a are formed by screwing the adjustment bar 44 having a predetermined length with one end of the threaded portion 44a and the male threaded portion 44b formed at the other end of the adjustment bar 44. It is composed of a second connecting bar 45, the other end of which is integrally connected to the two flanges (41b).

In addition, one end of the first and second connection bars 42 and 45 having one end connected to the first and second flanges 41a and 41b, respectively, as shown in FIG. 10) and pivoting operation via the pin members 46a and 46b to smoothly move the rectifier tube 30 when the gap is adjusted in a state of circumferentially spaced 90 ° between the rectifier tube 30 and 10). Are assembled.

Here, the groove 41c is formed in the middle of the length of the adjustment bar 44 to facilitate the rotation operation of the support rod for adjusting the gap between the raw material storage tank 10 and the rectifying pipe 30.

The operation of the present invention having the above configuration will be described.

When the device 1 of the present invention is mounted on the taper portion 19 of the raw material storage tank 10, the raw material light transferred by the tripper 20 to the upper portion of the raw material storage tank 10 is loaded dropwise. Since the raw light is incorporated into the central portion of the raw material storage tank 10, the central portion is stored on a mountain cross section having a higher formation height than the wall portion, and the raw light is rolled up to the periphery of the wall of the storage tank by coarse ore of coarse particles in accordance with the angle of repose on the mountain cross section. Small granules of small particle size gradually accumulate in the center.

In such a state, when the gate 11 installed at the lower portion of the raw material storage tank 10 is opened and discharge of raw material light is started through the discharge port 12, the discharge of the small ore accumulated at the center portion of the allelic ore accumulated at the wall portion is started. Since most of the small ore that is discharged earlier than the discharge but is discharged first enters the rectifying pipe 30 of the raw material storage tank 10 and the discharge speed is suppressed, the outer surface of the rectifying pipe 30 and the raw material storage tank 10 are discharged. It is the same as the discharge rate of the opposing ores slowly entering the walls between the).

In addition, the inner and outer surfaces of the rectifying pipe 30 are provided with a plurality of annular locking jaws 31 and 32 for inducing frictional resistance with the small-size ore having a high discharge rate, thereby efficiently discharging the small ore discharge rate. It can be delayed.

Accordingly, in the outlet 12 of the raw material storage tank 10, the opposite ore with a relatively slow discharge rate and the small ore particles discharged at the same discharge rate as the opposite ore are delayed by the fast discharge rate by the rectifying pipe 30. By properly mixing and being discharged to the post process, the raw light may be uniformly discharged to the post process.

On the other hand, when the result of the periodic particle size analysis attached light is generated inside the raw material storage tank 10 and the discharge flow of the raw material light by particle size into the rectifying plate 30 is not uniform, the rectifying pipe 30 to the raw material storage tank 10 Rotate the adjustment bar 44 of the support rod 41 installed to be fixed to the forward or reverse direction to widen or narrow the gap between the outer surface of the rectifying pipe 30 and the wall of the raw material storage tank 10. Change position

FIG. 8 is a graph showing a correlation between raw material light emission in a raw material storage tank employing the apparatus of the present invention and raw material particle size and discharge time when discharging the raw material light of the conventional raw material storage tank. While the emission time varies from the beginning to the end of the discharge depending on the particle size of the raw material, it can be seen that the raw material emission of the present invention is always constant from the beginning to the end regardless of the particle size of the raw material. have.

According to the present invention as described above, by discharging the raw ore charged into the blast furnace through the discharge port of the raw material storage tank to delay the discharge of the opposing ore in the vicinity while delaying the discharge rate of the small ore in the center by the rectifying pipe disposed in the raw material storage tank. Normally guided, small ore and alleles are properly mixed and discharged uniformly at the discharge port, thereby directly contributing to the stability of the blast furnace operation, improving the work productivity of the blast furnace, and inducing uniform gas flow in the furnace to suppress the heat load of the facility As a result, the service life of the equipment can be extended.

In addition, the effect of suppressing the generation of adherent light stuck to the wall of the raw material storage tank is always maintained to keep the effective content of the raw material storage tank constant, and the effect of doubling the storage capacity of the raw material storage tank is obtained.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to clarify that knowledge is easy to know.

Claims (9)

In the raw material storage tank 10 for dropping and storing raw material light into the inside from the tripper 20 located in the height, and discharges the stored raw light to the bottom, Internal space of the raw material storage tank 10 so that the small ore and the ore integrated in the central portion of the raw material storage tank 10 and the opposing ore accumulated on the wall are guided at a uniform discharge rate through the outlet 12 of the raw material storage tank 10. Rectification tube 30 on the reverse cone cross-section disposed in the; And a support unit (40) for fixing the rectifying pipe (30) to the inner space of the raw material storage tank (10). The method of claim 1, The rectifying pipe 30 discharges the raw light uniform particle size of the raw material storage tank, characterized in that the raw material light discharge path stored in the raw material storage tank 10 is disposed in the taper portion 19 which begins to narrow toward the discharge outlet 12 side. Adjuster. The method of claim 1, The rectifying pipe 30 is a raw light uniform particle size emission control device of the raw material storage tank, characterized in that made of a hollow tubular member on the reverse conical section having an outer surface parallel to the wall portion of the tapered portion 19 of the raw material storage tank 10. . The method of claim 1, The upper outer diameter of the rectifying pipe 30 is a raw light uniform particle size emission control device of the raw material storage tank, characterized in that consisting of 3 to 4 times the size of the lower outer diameter. The method of claim 1, The inner and outer circumferential surface of the rectifying tube 30 is provided with a plurality of annular hooking jaws (31) 32 so as to generate a frictional resistance with the small ore discharged to the bottom in contact with the raw material storage tank of the Raw material uniform particle size emission control device. The method of claim 1, The support part 40 is a support rod having a predetermined length connected at both ends between the first flange 41a installed on the wall of the raw material storage tank 10 and the second planar 41b installed on the outer circumferential surface of the rectifying pipe 30. Comprising (41), the raw material light uniform particle size emission control device of the raw material storage tank, characterized in that at least two or more are installed between the raw material storage tank 10 and the rectification pipe (30). The method of claim 6, The support rod 41 has a first connecting bar 42 having one end connected to the first flange 41a so that the position of the rectifying pipe 40 can be varied, and a male screw part of the first connecting bar 42. Adapter 43 having one end of the female threaded portion 43a which is screwed with the adapter, and a predetermined length of the male threaded portion 44a which is screwed with the female threaded portion 43b formed at the other end of the adapter 43. The adjusting bar 44 and the female screw portion 45a formed by screwing the male screw portion 44b formed at the other end of the adjusting bar 44 to one end, and the other end is integrally connected to the second flange 41b. Raw light uniform particle size emission control device of the raw material storage tank, characterized in that consisting of a second connecting bar (45). The method of claim 7, wherein One end of the first and second connection bars 42 and 45, one end of which is connected to the first and second flanges 41a and 41b, is assembled to be pivotally actuated via the pin members 46a and 46b. A raw material uniform particle size emission control device for a raw material storage tank. The method of claim 7, wherein The raw light of the raw material storage tank is formed in the middle of the length of the support rod 41 to form a groove (41c) to facilitate the rotation operation of the support rod for adjusting the distance between the raw material storage tank 10 and the rectifying pipe 30. Uniform particle size discharge control device.