KR100971979B1 - Splash cover with cooling channel at heating part - Google Patents

Abstract

The present invention provides a smelting furnace splash cover having a heating unit cooling device for protecting the cover by installing a cooling device on a heating portion of a splash cover installed on a large water supply to protect the worker from scattering of the hot melt from the blast furnace and protecting the worker. The cooling channel 10 which is installed at the top of a portion in which the refractory portion 7 A to C which receives intensive heating from the melt 5a drawn out from the blast furnace outlet 2 is cut off. )and; A protective box (17) positioned by inserting a heat insulating material (16) in the lower portion of the cooling channel (10); Furnace bath having a heating unit cooling device, characterized in that consisting of a removable refractory 18 is fixed to the bottom of the protective box 17 by penetrating the protective box 17 through the bolt 19 Also provides a splash cover.

As such, the present invention can reduce the work load and the cost expenditure due to frequent replacement of the splash cover, and contribute to cost reduction by reducing the use of refractories that have been completely dismantled due to the difficulty of construction even during partial erosion. There is a practical effect.

Large hot water, splash cover, cooling channel, vent line, separate refractory, insulation

Description

Furnace large splash splash cover with heating part cooling device {SPLASH COVER WITH COOLING CHANNEL AT HEATING PART}

Figure 1a is a cross-sectional view conceptually showing the state of use of the furnace large water splash splash cover;

1B is a temperature distribution diagram showing a heating portion on-distribution of the furnace large-scale water splash cover;

Figure 2 is a partial cutaway view of the furnace hot water splash splash cover having a heating unit cooling apparatus according to the present invention;

Figure 3 is an exploded perspective view of the cooling device constituting the furnace large hot water splash cover having a heating unit cooling device according to the present invention;

Figure 4 is a side cross-sectional view showing a furnace splash hot water splash cover having a heating unit cooling apparatus according to the present invention.

5 is a conceptual diagram showing a state of use of the furnace splash hot water splash cover provided with a heating unit cooling apparatus according to the present invention.

♠ Explanation of symbols for the main parts of the drawing ♠

1: Blast furnace 2: Outlet 3: Splash cover 4: Large bath 10: Cooling channel

16: Insulation material 17: Protective box 19: Bonding bolt 7: Steel bar 8: Steel bar                 

18: Separable refractory 20: Ventane

The present invention relates to a molten metal large splash splash cover having a heating unit cooling device, and more particularly, a cooling apparatus in a heating portion of a splash cover installed on a large molten metal for scattering hot melt from the molten metal and protecting workers. Furnace baths having a heating section cooling device for protecting the cover by installing the same relates to a splash cover.

In general, as shown in Figure 1a, in front of the outlet port 2 of the blast furnace 1 has a function that is operated to protect the operator and the equipment from the scattering and high heat of the melt (5a) discharged from the outlet port 1 The splash cover 3 which has is provided

The splash cover 3 is constructed of a shell 8 and a refractory (castable) 7 and is installed in the large bathway 4 during the departure by a hydraulic device (not shown). The exit 2 is closed by the entrance closing machine (not shown) to complete the departure and allow the opening device and the worker to prepare for the next departure to enter the exit.

Since the splash cover 3 is installed close to the outlet 2 of the upper part of the large bath 4, the central part 6 of the castable 7, which is a refractory material installed inside due to the scattering and high heat of the melt, is concentrated. If the wear wear erosion is severe, even more severe, the service life of the splash cover (3) is shortened due to the deformation of the shell (8), frequent replacement work is required, which delays the starting work, there is a problem that the replacement of the splash cover (3) In case of partial erosion, there is a problem in the construction which needs to be dismantled and reconstructed due to the deformation of the shell and the construction problem, and the problems such as waste of expensive refractory and work load due to replacement work are pointed out.

FIG. 1B is a temperature distribution diagram showing the temperature distribution of the splash cover 3 installed on the large hot waterway 4 during the tapping operation, wherein the portion A which is locally heated by the hot melt is about 350 ° C. FIG. It was measured, and the outermost part (F) was measured at 130 ℃ is a temperature difference is much, it can be seen that the refractory castable (7) of the A site is severely eroded.

In order to solve the above problems, the present invention has a heating unit cooling device consisting of a heat insulating material and a cooling channel to block heat transfer in order to assemble the refractory easily replaceable in the center of the splash cover, and to prevent thermal deformation of the shell. The purpose of the furnace is to provide a splash cover.

In order to achieve the above object, the present invention is a splash cover which is composed of refractory and chilepi to prevent the scattering of melt from the blast furnace to the hot water and block the high temperature is installed on the hot water, intensive from the melt A cooling channel installed at the top of the cut-off portion of the refractory portion to be heated to circulate the cooling water; A protection box positioned by inserting a heat insulating material under the cooling channel; It is provided with a molten metal large splash splash cover having a heating unit cooling device, characterized in that consisting of a separate refractory fixed to the bottom of the protective box is fixed to the iron through the bolts bobo pumpkin.

In another aspect, the present invention provides a blast furnace large water splash splash cover having a heating unit cooling device, characterized in that the vent line penetrates the steel shell in order to solve the internal pressure change occurring in the cover portion in which the cooling channel is installed. do.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the present invention.

FIG. 2 is a partial cutaway view of a furnace large-scale water splash cover having a heating unit cooling apparatus according to the present invention, and FIG. 3 is a cooling apparatus of a furnace large-scale water splash cover having a heating unit cooling apparatus according to the present invention. Figure 4 is an exploded perspective view, Figure 4 is a side cross-sectional view showing a furnace splash hot water splash cover having a heating part cooling apparatus according to the present invention.

As shown in Figures 2 to 4, the blast furnace large-scale splash cover provided with a heating unit cooling apparatus according to the present invention, first, as shown in the above temperature distribution diagram of Figure 1b, the outside of the splash cover (3) The internal refractory 7 of the site | part heated to 200 degreeC or more is cut out in square shape and removed.

Then, to produce a cooling channel (10) having a size corresponding to the cut-out size to be located directly below the shell 8 of the splash cover,

A flexible hose 13a connected to the water supply pipe 14 and the drain pipe 15 extended along the cover hydraulic device 30 by allowing the water supply part and the drain part of the cooling channel 10 to protrude to the upper part of the shell 8. 13b) and couplings 11a and 12a.

Then, a lower portion of the cooling channel 10, the heat insulating material 16 is positioned to further block heat transfer, and then a protective box 17 for protecting the cooling channel 10 is located.

In the lower portion of the protective box 17, the separable refractory material 18 having the same shape and size is located, and the coupling bolt 19 is fixed to the central portion and the side of the separable refractory material 18, and the coupling bolt 19 ) Penetrates the protective box 17, penetrates the shell 8 of the splash cover 3 without interference with the cooling jacket 10, and is then fixed with a nut on the upper surface of the shell 8.

As described above, a space portion is essentially formed in the splash cover in which the cooling apparatus according to the present invention is installed, and the space portion causes a pressure change due to a temperature difference between the upper and lower portions, and the pressure change eventually causes the splash cover of the splash cover (8). ) Will cause deformation.

Therefore, in order to solve the internal pressure change occurring at the site where the cooling channel 10 is installed, the vent line 20 penetrated to the steel bar 8 is installed so that the internal pressure generated by the temperature difference between the upper and lower parts is installed. It will be solved.

Hereinafter, the operation of the present invention will be described in detail.

In principle, the cooling water supplied to the cooling channel 10 constituting the blast furnace large hot water splash cover having the heating part cooling apparatus according to the present invention is drained and reused.                     

That is, the cooling water supplied to the cooling jacket 10 cools the separate refractory material 18 to cool the high heat from the large water supply 4 to extend the life of the separate refractory material 18,

The thermal insulation material 16 located between the cooling channel 10 and the protective box 17 prevents the high heat of the large bath 4 from being transmitted to the steel bar 8 to prevent deformation of the steel bar 8.

The coolant water supply pipe and the drain pipes 14 and 15 installed along the main body of the hydraulic device of the splash cover having the cooling device according to the present invention are connected to the cooling jacket 10 and the water supply and drain pipes 14 and 15 even in the forward and backward operation. They move smoothly together by the hose 13a, 13b.

In addition, after the cooling jacket 10, the protective box 17, and the separable refractory 18 of the present invention are assembled to the shell 8 of the splash cover, the inner castable 7 is constructed. The castable construction protects the bolt 19 by constructing the head of the coupling bolt 19 of the separable refractory 18.

Therefore, the separate refractory 18 is installed separately at a portion heated locally to a high temperature, so that when the separate refractory 18 is eroded and melted from the melted water, only the separate refractory 18 is dismantled and replaced. By doing so, the construction problem of having to replace the entire refractory castable 7 is also solved.

As such, when the local erosion occurs in the central portion during the use of the splash cover, only the separate refractory 18 is dismantled and replaced, thereby simplifying the reconstruction in use and greatly reducing the working time, and the heat of the shell 8. It can prevent deformation.

As described above, the present invention reduces the heat load concentrated on the center portion of the splash cover by the installation of the cooling jacket to enable the use of the cover three times or more, thereby reducing the work load and the expenses for frequent replacement work, Even in partial erosion, there is a practical effect that can contribute to cost reduction by reducing the use of refractories that have been dismantled and reconstructed due to difficulties in construction.

Claims (2)

On the splash cover, which is composed of the refractory 7 and the chile 8, to prevent the scattering of the melt 5a, which is discharged from the blast furnace 1 to the large bath 4, and to block the high temperature, In A cooling channel (10) installed at the top of a portion in which the refractory (7) portion (A to C) which receives intensive heating from the melt (5a) that is erupted is circulated and the cooling water is circulated; A protective box (17) positioned by inserting a heat insulating material (16) in the lower portion of the cooling channel (10); The protective box 17 is penetrated through the bolt 19 is fixed to the steel shell 8 is composed of a separate refractory 18 is fixed to the lower protective box 17, Blast furnace splashing water having a heating unit cooling device, characterized in that the vent line 20 is installed through the steel shell 8 in order to solve the internal pressure change occurring in the portion in which the cooling channel 10 is installed. cover. delete

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