KR20130026195A - Runner of furnace - Google Patents

Abstract

PURPOSE: A main iron through of a blast furnace is provided to minimize the inflow amount of a slag which flows into a torpedo car and to prevent the generation of attaching lines inside the torpedo car. CONSTITUTION: A main iron through(10) of a blast furnace comprises an iron through(12), a protrusion part, a skimmer, and a slag discharging hole(20). The slag discharging hole is forms in the position according to the height of the protrusion part from the bottom surface of the iron through. The slag discharging hole is formed in front of the skimmer along the progressing direction of a melt. A discharging channel(22) is installed in the outside of the iron through, is connected to the slag discharging hole, and transfers the slag which is discharged from the slag discharging hole.

Description

Great bath of blast furnace {RUNNER OF FURNACE}

The present invention relates to a large degree of blast furnace. More specifically, the present invention relates to a large hot water blast furnace that can separate and discharge the waste water and slag during the after-stage treatment.

In general, the blast furnace operation charges iron ore and coke from the upper part of the furnace, and blows high temperature hot air sent from the hot blast furnace equipment from the bottom to melt and reduce the iron ore as heat to produce the molten iron.

Waste water generated in the blast furnace is discharged through the outlet formed in the side of the blast furnace. The waste water discharged from the exit is placed in a mixed truck (TLC) after passing through a large bath on the blast furnace.

While passing through the large hot water, the slag forms a layer by the difference in specific gravity, the slag flows in the state where the molten iron is collected in the upper side.

The large hot water is a skimmer is installed on one side, when the sludge is passed through the skimmer, the slag with less specific gravity is discharged through the outlet in the front of the skimmer flows into the slag bath and the wire bed (to collect the molten iron contained in the slag) It is overflowed from the puddle installed in the slag tangle) and flows along the slag tangle to be put into a work process in which water and lumps are treated. In addition, the molten iron having a high specific gravity in the large hot water flows through the lower portion of the skimmer and is introduced into the mixed car which is the molten iron moving vehicle via the molten iron and the raceway and transported to the post process.

As the hot water flows as described above, erosion and wear of the large hot water occurs, and after using the hot water for a certain time, the internal state of the hot water is checked and repaired. When checking and repairing the large hot water, the afterglow treatment for discharging the waste water accumulated in the large hot water is performed.

Conventional afterglow treatment is carried out by drilling a hole in the bottom of the main bath to discharge the waste water. The molten iron and slag are mixed in the remnant in the large bath, and the molten iron is discharged during the initial discharge of the molten iron, but the molten iron and the slag are discharged together in the later stage. Therefore, it is difficult to separate the molten iron separately from the discharged remnants and it is difficult to identify with the naked eye, so most of the slag is mixed with the molten iron like molten iron and transferred to the post process.

As the slag is mixed in the crossroads as described above, an attachment line is generated on the inner wall of the crossroads, thereby reducing the repair ability, thereby increasing the repair cost and causing the crossroads to be unusable.

In addition, no slag is discharged during solidification of slag in the crossroad vehicle, so a separate slag crushing and melting operation is required, which delays the process, increases the workload, and reduces the product yield.

In addition, there is a problem in that the dewatering operation is poor in a later step due to the slag mixed in the molten iron.

Thus, the slag is more completely separated and discharged during the remnant treatment of the large hot water, thereby providing a hot water of the blast furnace which can minimize the incorporation of slag in the molten iron.

To this end, the main bath is a runway in which the melt discharged from the exit port is stored, a jaw portion protruding upwardly formed on the bottom surface of the front end of the bathway, and protrudes from the top of the bathway to the bottom surface and slag in the melt. Skimmer to separate the, may be formed on the side of the flow when discharging the remaining melt may include a slag discharge hole for separating and discharging slag of the melt remaining in the water.

The large tap water may further include a discharge path which is installed outside the tap water and connected to the slag discharge hole to transfer the slag discharged from the slag discharge hole.

The large bath may further include a residual hole for separating and discharging the molten iron of the residual melt is formed on the bottom side of the ball.

The large bathway may further include a residual line which is installed outside the waterway and connected to the residual line to transfer the molten iron discharged from the residual line.

The large bath may further include a discharge outlet formed in the upper end of the ballway, the slag is discharged, and a slag furnace installed outside the water supply and connected to the discharge hole to transfer the slag.

The slag discharge hole may be formed in front of the skimmer along the traveling direction of the melt.

The slag discharge hole may be formed at a position corresponding to the top height of the jaw portion from the bottom of the ballway.

According to the present embodiment as described above, it is possible to minimize the amount of inflow of slag introduced into the crossroad difference during the remnant processing in the large bath.

In addition, it is possible to prevent the occurrence of adhesion lines in the crosstalk by mixing the crosstalk of the slag.

In addition, it is possible to minimize all the problems caused for the reprocessing of the slag in the post-process.

1 is a schematic perspective view showing a large water supply of the blast furnace according to the present embodiment.
2 is a partially cutaway perspective view showing the structure of the large bath according to the present embodiment.
3 is a side sectional view schematically showing the structure of a large bath according to the present embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. As those skilled in the art can easily understand, the embodiments described below may be modified in various forms without departing from the spirit and scope of the present invention. Wherever possible, the same or similar parts are denoted using the same reference numerals in the drawings.

All terms including technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

1 illustrates a large bath according to the present embodiment, and FIGS. 2 and 3 are partial cutaway perspective views and side cross-sectional views illustrating a structure of the large bath according to the present embodiment.

With reference to the drawings will be described a structure for separating and discharging molten iron and slag during the melt discharge treatment remaining in the large bath (10).

In the blast furnace, as coke and pulverized coal are burned, a reducing gas is generated and reacts with iron ore, thereby producing a melt composed of molten iron and slag. The produced melt is discharged to the large bath 10 through the outlet 100 of the blast furnace. The melt is separated into the molten iron and the slag by the specific gravity difference passing through the large hot water (10), the molten iron is sent to the crossroad car and the slag is sent to the dry pit (dry pit) is processed.

The large tap water 10 includes a tap water 12 through which the melt discharged from the tap hole 100 flows out. An exhaust port 13 for discharging the slag constituting the upper layer separated by the specific gravity difference is discharged from the water supply 12 at one upper end of the water supply 12. The slag furnace 14, which is connected to the exhaust outlet 13 and flows out slag discharged through the exhaust outlet 13, is installed on the outer surface of the water supply 12.

Accordingly, the melt discharged to the large tap water 10 flows along the tap water 12 of the large tap water 10 and is separated by a specific gravity difference to form an upper layer slag, which is discharged to the slag furnace 14 through the outlet 13. Then, only the molten iron forming the lower layer flows into the crossroad car through the front end of the water supply 12.

Here, the large bath 10 is provided with a skimmer 15 to prevent the slag forming the upper layer of the melt from escaping to the tip of the tap 12, such as molten iron and to discharge only the molten iron. In addition, at the tip of the runway 12, a jaw portion 17 is provided to maintain a constant level of the melt in the runway 12 so that slag, which is an upper layer of the melt, may be blocked by the skimmer 15.

The skimmer 15 protrudes from the top of the runway 12 to the bottom surface and the bottom blocks the runway 12, and the bottom of the runner 12 allows the molten iron to escape. It is made of open structure. The skimmer 15 is provided between the jaw portion 17 of the tip of the runway 12 and the discharge hole 13. In addition, the skimmer 15 is formed such that the lower end thereof is sufficiently lower than the upper height of the jaw portion 17.

The jaw portion 17 is formed to protrude upward in the bottom surface of the front end of the ballway 12. As shown in FIG. 3, the jaw portion 17 is smoothly curved at the bottom of the water supply 12 and swells up, and is not particularly limited in its form.

Therefore, the molten iron forming the lower layer of the melt is greater than the slag is passed through the open gap 16 of the bottom of the skimmer 15 to the front end of the tap (12), the slag is blocking the upper layer of the tap (12). Blockage by the skimmer 15 prevents movement to the tip of the runway 12.

And the melt is stored in the water level 12 by the jaw portion 17, the skimmer 15 is immersed in the melt, the slag of the melt is blocked by the skimmer 15. Only the molten iron forming the lower layer of the melt flows out over the jaw portion 17 to the front end of the tap water 12.

Here, since the melted water is accumulated in the water supply 12 at a predetermined level by the jaw portion 17 of the water supply 12, the molten water 10 needs to remove the residual melt accumulated in the water supply 12 if necessary. do.

To this end, the large bath 10 in the present embodiment is formed on the bottom side of the waterway 12 includes a residual hole 18 for separating and discharging the molten iron of the residual melt.

In addition, the large tap water 10 includes a slag discharge hole 20 which is formed on the side of the water flow 12 when discharging the residual melt to separate and discharge the slag of the melt remaining in the water flow 12. In the present embodiment, the slag discharge hole 20 is made of a circular hole, but is not particularly limited thereto, and may be formed in various structures such as an elliptical shape or a rectangular shape.

As such, by separately treating the slag through the slag discharge hole 20 in the process of discharging the residual melt from the water supply 12, the slag may be prevented from flowing into the crossroad with the molten iron during the residual melt treatment.

The discharge passage 22 is connected to the slag discharge hole 20 to transfer the slag discharged from the slag discharge hole 20 to the outside of the water supply 12. In addition, a residing line 19 connected to the remnant hole 18 to transfer the molten iron discharged from the remnant hole 18 is installed outside the water supply 12.

The discharge path 22 may be integrally installed in the runway 12, and may be provided separately from the runway 12 to be connected to the outside of the runway 12 as necessary.

The slag discharged from the slag discharge hole 20 is transferred to the dry fit along the discharge path 22, the molten iron discharged through the remnant hole 18 is contained in the crossroad car is transferred to the post process.

In the present embodiment, the position where the slag discharge hole 20 is formed may be formed in front of the skimmer 15 along the advancing direction of the melt. That is, as shown in Figure 3, the slag discharge hole 20 is formed between the outlet 13 and the skimmer 15. The slag of the melt blocked by the skimmer 15 is discharged through the slag discharge hole 20 located in front of the skimmer 15 to the outside of the waterway 12.

In addition, the slag discharge hole 20 has a structure formed at a position corresponding to the top height of the jaw portion 17 from the bottom surface of the water supply (12). Herein, the position corresponding to the top height of the jaw portion 17 may be understood as a position where the slag discharge hole 20 passes or contacts the horizontal line passing through the top portion of the jaw portion 17.

The molten iron that has passed the skimmer 15 in the runway 12 has to cross the jaw portion 17 of the tip of the runway 12 to be discharged to the outside. In the waterway 12, the melt remains in a cold state to the upper height of the upper jaw portion 17.

The molten iron is filled in the residual melt to the upper height of the jaw portion 17, and the slag having a smaller specific gravity than the molten iron is blocked by the skimmer 15 to float on the molten iron.

Therefore, as shown in Figure 3, as the slag discharge hole 20 is formed on the side of the water supply 12 at a height corresponding to the top height of the jaw portion 17, the slag floating on the molten iron is slag discharge hole It can be discharged to the outside through (20).

Looking at the process of processing the residual melt of the blast furnace 10 (10) according to this embodiment having the structure as described above are as follows.

The melt discharged through the outlet 100 is stored in the tap water 12, the slag is blocked by the skimmer 15, and only the molten iron passes through the gap 16 at the bottom of the skimmer 15 and the tip of the water tap 12. Inflow to and discharged beyond the jaw (17). When the discharge of the melt through the outlet 100 is completed and the melt is no longer introduced into the runway 12, the melt remains at the top height of the jaw 17 in the runway 12.

In order to process the residual melt in this state, the outlet passage 22 is first installed outside the water supply 12 to connect with the slag discharge hole 20. When the discharge passage 22 is connected to the slag discharge hole 20, the slag discharge hole 20 is opened.

When the slag discharge hole 20 is opened, the slag forming the upper layer of the residual melt in the water supply 12 is discharged to the outside of the water supply 12 through the open slag discharge hole 20. The slag discharged through the slag discharge hole 20 is transferred along the discharge path 22. The slag discharge hole 20 is formed at a position corresponding to the upper layer with the slag of the melt remaining in the water supply 12, so that only the slag of the residual melt can be discharged first.

When the slag discharge through the slag discharge hole 20 is completed, the remnant hole 18 is opened. The molten iron remaining in the water supply 12 is discharged through the remnant hole 18, and the molten iron discharged is transferred along the residual line 19 connected to the residual line 18.

As such, the slag of the upper layer of the melt is discharged through the slag discharge hole 20 before the molten iron in the residual melt is discharged through the remnant hole 18, so that only the molten iron can be discharged through the remnant hole 18. do.

While the illustrative embodiments of the present invention have been shown and described, various modifications and alternative embodiments may be made by those skilled in the art. Such variations and other embodiments will be considered and included in the appended claims, all without departing from the true spirit and scope of the invention.

10: large bath 12: water
13: Bae Jae-gu 14: Slag
15: Skimmer 16: Niche
17: jaw portion 18: remnant
19: residual line 20: slag discharge hole
22: discharge path

Claims (7)

The melt flow discharged from the outlet of the blast furnace is stored, the upper projection protruding in the bottom surface formed on the bottom surface of the front end of the water supply, the skimmer projecting from the upper end of the water flow to the bottom surface to separate the slag from the melt And a slag discharge hole which is formed on the side of the water supply when discharging the remaining melt and separates and discharges slag from the melt remaining in the water supply. The method of claim 1,
The slag discharge hole is a large hot water of the blast furnace is formed in a position corresponding to the top height of the jaw portion from the bottom of the hot water. The method of claim 2,
The slag discharge hole is the hot water of the blast furnace is formed in front of the skimmer along the direction of the melt. The method according to any one of claims 1 to 3,
The blast furnace large hot water furnace further comprises a discharge path is installed on the outside of the hot water and connected to the slag discharge hole to transfer the slag discharged from the slag discharge hole. The method of claim 4, wherein
The hot water furnace of the blast furnace is formed on the bottom side of the hot water further comprises a residual hole for separating and discharging the molten iron of the residual melt. The method of claim 5, wherein
The tangible blast furnace of the blast furnace further comprises a remnant line installed outside the hot water and connected to the remnant ball to transfer the molten iron discharged from the remnant ball. The method according to claim 6,
The blast furnace of the blast furnace further comprises a discharge outlet formed in the upper end of the hot water and the slag is discharged, and a slag furnace which is installed on the outside of the hot water and connected to the discharge hole to transfer the slag.

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