KR20140047294A - Nozzle guide of atomizing for treatment equipment of reduction slag - Google Patents

Abstract

The present invention provides a spray nozzle guide for a spray device of a slag treatment apparatus. The spray nozzle is provided to secure the linearity of high speed sprayed gas and scattered slag by having a guide installed on the front thereof and to gather the directions of the scattered slag in the center, thereby maximizing the output of slag balls, wherein the spray nozzle is formed in a spray device which sprays the high speed gas onto slag falling in a molten state at high temperatures inside a tundish for scattering the slag, then dropping and solidifying the slag in a ball or a fiber shape. The slag treatment consists of: the tundish for controlling the flow rate of slag which falls from a slag port after being generated in an electric furnace and drawn at a fixed amount; the spray device provided with the spray nozzle which distributes the slag by spraying the high speed gas onto the molten slag falling from the tundish; and the guide which is installed on the front of the spray nozzle of the spray device and which guides the slag scattered by a sprayed substance.

Description

Nozzle guide of atomizing device for slag treatment equipment {Nozzle guide of atomizing for treatment equipment of reduction slag}

The present invention relates to a slag treatment device, and more particularly, a guide is installed in front of an injection nozzle of an injector for injecting a high-speed gas to slag falling from a tundish to a high temperature molten state to improve the straightness of the slag to scatter slag. The present invention relates to a spray nozzle guide of an injector for a slag treatment device capable of concentrating a direction to a center side.

In general, reduction refers to a process of removing oxygen from an oxide, which refers to a process of refining ore, which is an oxide of a metal, to obtain a pure metal.In the process of dissolving minerals, oxygen is dissolved in a molten metal or an oxide is formed, so the atmosphere of a slag or a furnace is reduced. The reduction is carried out by adjusting.

Thus, the reduction slag generated in the electric furnace reduction process occupies about 20% of the total slag generated in the electric furnace and the outside, and about 750,000 tons of reducing slag were generated in 2007, and about 100% in 2010. The amount of reducing slag is gradually increasing, such as reducing slag of about 10,000 tons.

On the other hand, in the case of reducing slag generated in the electric furnace, not only there is no suitable use, there is a problem that it is difficult to use value-added because there is up to 20% of the glass lime in the total reducing slag.

Here, the reducing slag generated in the electric furnace is left to stand for several days in a general environment in the atmosphere, or treated through a process of pulverizing and processing after cooling through a sprinkling method.

However, as described above, the treatment of the reducing slag causes environmental pollution such as noise, vibration, scattering dust, and leachate, and requires a space for storing or leaving a large amount of reducing slag. A site having a matching space is required, and there is a problem of securing stability to glass lime included in the reducing slag after cooling.

For this reason, in the case of reducing slag generated in an electric furnace, since there is no suitable use, it acts simply as a factor of lowering the recycling rate of slag generated in an electric furnace, and the urgent establishment of recycling technology is required.

On the other hand, as described above, various methods for recycling the reduced slag discharged in the molten state of high temperature has been proposed, one of these methods, by spraying the gas through the injector to the discharged slag to cool and solidify the slag ball Alternatively, it has been proposed to transform the fiber into a building and construction material.

However, the slag treatment method causes environmental problems such as scattering dust, leachate, etc., and slag balls, which are cooled and solidified while being scattered by high pressure gas injection, are scattered in the front, left, and right directions of the injector. There is a risk of a safety accident by irregularly scattering the back, and there is a problem that the slag is fixed to other peripheral equipment causing damage and breakage of the equipment.

The present invention has been made in order to solve the problems described above, the injection of the injector for dropping and solidifying in the form of a ball or fiber after spraying a high-speed gas to the slag falling in the hot melt in tundish to scatter the slag By installing a guide in front of the nozzle, it ensures the straightness of the injected high-speed gas and the straightness of the scattered slag to concentrate the scattering direction of the slag to the center side, maximizing the production of slag balls, and spraying nozzles from the hot slag. An object of the present invention is to provide a spray nozzle guide of an injector for a slag treatment device that can be protected.

In addition, the present invention, the refractory member is installed on the inner side of the injection nozzle guide in contact with the slag to be scattered, the cooling water circulation space is formed to circulate the cooling water supplied from the outside to the durability of the guide against the slag of high temperature, high heat and An object of the present invention is to provide a spray nozzle guide of an injector for a slag treatment device capable of improving heat resistance.

In addition, the present invention can control the scattering direction of the slag ball scattered by the high-speed gas of the injector and at the same time maintain the loading position of the slag ball to facilitate the collection and processing of the slag ball to the slag scattered at the same time Safety accidents can be prevented, and an object of the present invention is to provide a spray nozzle guide of an environmentally friendly slag treatment injector.

In order to achieve the object as described above, the present invention, a tundish for controlling the flow rate of the slag is dropped through the slag port generated after a certain amount of tapping; And an injector having an injection nozzle for injecting high-speed gas into the molten slag falling from the tundish to scatter the slag. In the slag processing apparatus comprising a, characterized in that consisting of a guide including a guide for guiding the slag scattered by the injection is injected in front of the injection nozzle of the injection device toward the center side.

Here, the guide is formed in a substantially 'c' shape in cross section so as to give straightness to the slag scattered by the high-speed gas injected from the injection nozzle.

At this time, the fireproof member made of a refractory material is installed on the inner surface of the guide.

On the other hand, a cooling water circulation space is provided inside the guide, and a cooling water pipe for connecting and injecting cooling water into the cooling water circulation space is connected.

As described above, the present invention having the configuration as described above can maximize the production of slag balls by concentrating the slag scattering direction to the center side by securing the straightness of slag that is scattered after falling into a molten state of high temperature, It is easy to induce slag which is transformed into slag ball and fiber after being scattered, so that it is possible to collect and process slag ball and fiber stably, to prevent safety accidents, and to make the coolant circulate at the same time as the refractory member is installed. And improving the durability and heat resistance of the slag against high heat.

In addition, it prevents the occurrence of noise, vibration, scattering dust, and leachate generated during slag treatment, and can be reprocessed and reproduced to the size or particle that requires slag fiber, and can be applied as an additive to building materials or concrete aggregates. Therefore, it is possible to recycle waste materials that are discarded due to this and at the same time, it is easy to secure the stability of waste materials, which is environmentally friendly, and does not require a separate space and site for storing or leaving a large amount of reducing slag, thereby reducing costs. And not only the space utilization is improved, but also can be variously applied according to the field work situation.

1 is a view schematically showing a slag treatment apparatus according to the present invention,
Figure 2 is a side view schematically showing the injection nozzle guide of the injector for slag treatment apparatus according to the present invention,
Figure 3 is a front view schematically showing the injection nozzle guide of the injector for slag treatment apparatus according to the present invention,
4 is a view schematically showing a state in which the injection nozzle guide of the injection device for a slag treatment apparatus according to the present invention is installed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the scope of the present invention, but is merely an example, and various modifications can be made without departing from the technical spirit of the present invention.

1 is a view schematically showing a slag treatment apparatus according to the present invention, Figure 2 is a side view schematically showing a spray nozzle guide of the injector for a slag treatment apparatus according to the present invention, Figure 3 is a slag treatment according to the present invention 4 is a front view schematically showing a jet nozzle guide of a device injector, and FIG. 4 is a schematic view illustrating a jet nozzle guide of a jet device for a slag treatment device according to the present invention.

As shown in the figure, the slag treatment apparatus 1 according to the present invention has a configuration including a tundish 10 and an injection device 20.

The tundish 10 is generated in an electric furnace (not shown) when the slag (3) is poured into the slag port (2) is transported in the slag port (2) after tilting the slag port (2) to drop the slag (3) It is for dropping to the bottom surface, controlling the flow volume of the slag 3 which falls while simultaneously guiding the slag 3 of high temperature molten state to a predetermined direction and position.

To this end, the tundish 10 is supplied from the slag port 2, it is installed to be inclined at an angle to adjust the residence time and the discharge position of the slag (3) made in the molten state.

The injector 20 is to spray the high-speed gas to the slag 3 in the molten state falling from the tundish 10 to scatter the slag (3), located below the tundish 10, turn An injection nozzle 31 for injecting a high speed gas into the slag 3 falling from the dish 10 is provided, and the slag 3 is cooled and solidified by the high speed gas injected from the injection nozzle 31.

At this time, the slag (3) made of a high temperature molten state falling from the tundish 10 by the high-speed gas injected from the injection nozzle 31 of the injection device 30 is a sphere having a constant diameter or various diameters It is made in the form or modified into a fiber having a certain length, thickness or various lengths, thicknesses.

In one embodiment of the present invention, the injection device 30 is made to inject a high-speed gas to the slag (3) falling from the tundish 10 to deform the slag (3) into a spherical form or fiber form, but If the slag 3 falling from the tundish 10 is easily scattered and deformed into a spherical or fibrous form, the injector 30 may be configured to spray high pressure air or cooling water.

Here, the injection environment, such as the pressure, flow rate and temperature of the high-speed gas injected through the injection nozzle 31 of the injection device 30, the temperature of the slag (3) in the hot melt state falling from the tundish 10, It can be variously changed according to the discharge amount, and variously variable according to the shape, size, thickness and length of the slag ball and the slag fiber which also require the injection conditions such as the position and angle of the injection device 30 and the injection nozzle 31. It is possible.

In addition, the high speed gas injected from the injection nozzle 31 of the injection device 30 is preferably made of nitrogen or the like so as to easily scatter and cool the slag 3 formed in a high temperature molten state, but is not limited thereto.

Here, the guide 50 is installed in front of the injection nozzle 31 of the injection device (30). That is, a guide 50 for guiding the slag 3 scattered by the high speed gas and the high speed gas injected from the injection nozzle 31 is provided in front of the injector 30.

In this case, the guide 50 has a cross-sectional shape having a substantially '' shape, the refractory member 51 is provided therein, a cooling water circulation space 53 for circulating the cooling water is formed therein, Cooling water pipes 55 for supplying cooling water to the cooling water circulation space 53 are provided.

That is, the guide 50 is formed in a rectangular parallelepiped shape, and the front, rear, and top portions thereof are opened to have a cross-section having a substantially '' shaped shape, and refractory to the inside of the guide 50 to which the slag 3 is scattered. A refractory member 51 made of a material is provided, and a coolant circulation space 53 for circulating coolant supplied from the outside is formed therein, and coolant for inflow and discharge of coolant in the coolant circulation space 53. Piping 55 is provided.

Meanwhile, the coolant pipe 55 circulates the coolant circulation space 53 through an inlet 56 for introducing coolant into the coolant circulation space 53 formed in the guide 50 and the inlet 56. A discharge port 57 for discharging the coolant is provided.

Here, the fireproof member 51 provided on the inner side of the guide 50 is preferably formed in a '-' shape corresponding to the inner shape of the guide 50, but is not limited thereto.

On the other hand, the coupling member 58 is provided in the horizontal direction in the inner central portion of the guide 50, the coupling member 58 has two or more injection nozzles 31 formed in the injection device 30 When made of injection nozzles, it is made to be coupled to the space between each injection nozzle.

In an embodiment of the present invention, the coupling member 58 is provided at the inner center of the guide 50 in the horizontal direction to facilitate the coupling to the porous jet nozzle having two or more nozzles. ) Is coupled to the single-hole injection nozzle consisting of one nozzle, the coupling member 58 provided in the inner center of the guide 50 can be deleted.

As described above, the guide 50 is installed close to the injection nozzle 31 of the injection device 30 to ensure the straightness of the injected high-speed gas and at the same time to ensure the straightness of the slag 3 to be scattered slag. It is possible to maximize the production of the ball, the refractory member 51 is provided on the inside of the guide 50 and at the same time the cooling water is made to circulate therein so that the high and high heat slag 3 of the guide 50 Durability and heat resistance can be improved.

In addition, the slag ball falling on the floor after being scattered can be maintained and controlled by the guide 50 to maintain and control the scattering direction of the slag 3 scattered by the high-speed gas injected from the injection device 30 And since the fiber is loaded at a predetermined position and place, the slag ball and the fiber can be easily collected and processed, and safety accidents due to scattering of the slag 3 can be prevented.

In one embodiment of the present invention, but the cooling water is circulated in the cooling water circulation space 53 formed in the guide 50, if it is easy to protect the guide 50 from the high temperature and high temperature of the slag (3) It is also preferable that the cooling gas or air is circulated in the cooling water circulation space 53.

Here, through a collecting device or a collecting device (not shown) in the form of a collecting vehicle or a collecting vehicle which is generally used to collect the slag ball falling to the bottom surface after being scattered by the high-speed gas of the injection device 30 and the collecting device A processing apparatus (not shown) for processing the collected slag balls is further provided.

Hereinafter, an operation process of the injection nozzle guide of the injector for slag processing apparatus according to the present invention will be described.

First, the slag (3) generated in an electric furnace (not shown) is transported by containing the slag (3) in a slag port (2) and then tilted the slag port (2) is inclined at a predetermined angle to the slag (3) at a high temperature Is supplied to the tundish 10.

At this time, the supply amount and the discharge amount of the slag 3 in the molten state tapping into the tundish 10 is taken in real time through a camera (not shown) of a monitoring device (not shown) installed separately, and then the photographed slag (3) It is preferable that the data according to the supply amount and the discharge amount of the "

As described above, when the slag 3 formed in the hot molten state falls to the predetermined direction and the predetermined position through the tundish 10, the injector 30 positioned below the tundish 10 is injected. The high-speed gas is injected to the front side of the tundish 10 through the nozzle 31, so that the slag 3 falling from the tundish 10 is scattered to the front side of the tundish 10, but with a constant trajectory. As it scatters, it falls and deforms and solidifies into slag balls and fibers.

Here, the straightness of the high speed gas injected from the injection nozzle 31 and the slag 3 scattered by the high speed gas are improved by the guide 50 provided in front of the injection nozzle 31 of the injection device 30. As a result, not only the front side of the injection nozzle 31, but also the slag 3 scattered to the left and right on the front side is scattered only to the front side of the injection nozzle 31.

That is, the slag (3) falling through the injection nozzle 31 of the injection device 30 is guided along the inner surface of the guide 50 by the high-speed gas is injected irregularly up, down, left, right, etc. It does not fly, but falls uniformly only to the bottom surface of the front center side of the injection nozzle 31.

At this time, the durability of the guide 50 by the slag 3 made of a high temperature molten state by the refractory member 51 provided inside the guide 50 is improved, and is formed inside the guide 50. By supplying the cooling water to the cooling water circulation space 53 through the cooling water pipe 55, the heat resistance and durability according to the high temperature and the high temperature of the slag 3 are improved.

By the structure as described above, the slag 3 is scattered by the high-speed gas injected through the injection nozzle 31 of the injection device 30, the guide 50 is installed on the front side of the injection nozzle 31 Guided to be scattered only to the front center side, so that the loading position of the slag ball can be kept constant, thereby facilitating the collection and processing of the slag ball.

Thus, slag balls and fibers that are scattered by the high-speed gas injected from the injection nozzle 31 of the injector 30 and then fall to the bottom surface are collected through a separate collecting device (not shown), and collected Slag balls and fibers are supplied and put into separate processing equipment (not shown), and then used as additives in construction materials or other various products and recycled.

While the invention has been shown and described in connection with particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention as set forth in the appended claims. Anyone can easily know.

1: slag treatment device, 2: slag port,
3: slag, 10: tundish,
30: injection device, 31: injection nozzle,
50: guide, 51: fireproof member,
53: cooling water circulation space, 55: cooling water piping,
56: inlet, 57: outlet,
58: coupling member.

Claims (4)

A tundish for controlling the flow rate of the slag generated through the slag port after being discharged from the electric furnace by a predetermined amount; And an injector having an injection nozzle for dispersing the slag by injecting a high-speed gas into the molten slag falling from the tundish; In the slag processing apparatus comprising:
The injection nozzle guide of the injector for a slag processing apparatus, characterized in that it comprises a guide for guiding the slag scattered by the injection being injected in front of the injection nozzle of the injector toward the center side.
The method according to claim 1,
The guide is the injection nozzle guide of the injector device for a slag treatment device, characterized in that the cross section is formed in a substantially 'c' shape to give a straightness to the slag scattered by the high-speed gas injected from the injection nozzle.
The method according to claim 2,
The injection nozzle guide of the injector for slag processing apparatus, characterized in that the refractory member made of a refractory material is installed on the inner surface of the guide.
The method according to claim 2,
Cooling water circulation space is provided in the guide, the injection nozzle guide of the injector for slag treatment apparatus, characterized in that the cooling water pipe for connecting and inleting and discharging the cooling water in the cooling water circulation space.

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