KR101419404B1 - Heat treatment equipment and method for heat treatment of material us the same - Google Patents

Abstract

The present invention relates to a heat treatment apparatus for heat treating a raw material contained in a container, comprising: a first heat source supply unit for supplying hot air into a container; and a second heat source supply unit for supplying a plurality of heat sources, .
Therefore, according to the embodiments of the present invention, the raw material is heated by the hot air, the first reaction heat, and the second reaction heat by spraying the hot air to the upper side of the vessel and spraying the first and second heat sources to the lower side. Accordingly, the raw material can be uniformly heated as compared with the prior art, and local heating of the raw material can be prevented.

Description

TECHNICAL FIELD [0001] The present invention relates to a heat treatment apparatus and a heat treatment method using the same,

The present invention relates to a heat treatment apparatus and a raw material heat treatment method using the same, and more particularly, to a heat treatment apparatus capable of uniformly heating a raw material and a raw material heat treatment method using the same.

In the general steelmaking process, molten iron leached from a blast furnace is charged into a converter, the molten iron is heated to a certain temperature or higher in the converter, and the ore (Mn-Ore, TiO ₂ , V ₂ O ₅ and the like) Add ingredients to melt. At this time, as a method of heating the charcoal, ore, and additives, an electric furnace dissolving using electricity is used, or heating is performed using an aluminum (Al) thermite reaction.

Here, the electric furnace is heated by using arc heat generated by energizing a high current to an electrode rod installed at least one end of the electric furnace to be charged into the electric furnace. However, in the case of heating using an electric furnace, the region adjacent to the electrode rod is locally heated. That is, the temperature difference between the region adjacent to the electrode rod and the region not adjacent to the electrode rod is large, and the heating can not be uniformly performed.

Further, aluminum (Al), a heating method using a thermite reaction when reducing and character material, for example In the aluminum (Al) in a vessel with a V ₂ O ₅ contents, and the addition of the flame in the container, V ₂ O ₅ and Al (Al) reacts. At this time, the materials contained in the vessel are heated by the reaction heat generated during the reaction of V ₂ O ₅ and aluminum (Al). However, such a heating method requires a large amount of material (Al) to be input for the thermite reaction, which is high in price, which raises the cost.

Korean Patent Laid-Open Publication No. 2011-0059128 discloses an electric furnace for generating arc heat by using an electrode rod to melt scrap iron.

Korean public patent 2011-0059128

The present invention provides a heat treatment apparatus capable of uniformly heating a raw material, a heat treatment apparatus using the same, and a raw material heat treatment method using the same.

In addition, the present invention provides a heat treatment apparatus which can easily adjust the temperature according to the material of the raw material, and a method for heat treatment of the raw material using the same.

The present invention relates to a heat treatment apparatus for heat-treating a raw material contained in a vessel, the apparatus comprising: a first heat source supply unit for supplying hot air into the vessel; And a second heat source supply unit for supplying a plurality of heat source materials that react with each other in the vessel to generate reaction heat; .

The first heat source supply unit includes a lance that is installed to the upper side of the inside of the container and injects hot air into the container.

The second heat source supply unit includes a supply member, one end of which is inserted into the lower portion of the container, and is located opposite to the lance, and supplies a plurality of heat sources into the container.

The supply members are provided in a plurality of spaced apart from each other.

The lances are preferably positioned on the upper side of the central portion between the plurality of supply members spaced apart from each other.

A method for heat treatment of a raw material according to the present invention comprises the steps of charging a raw material into a vessel; Supplying hot air into the container to heat the raw material; And a step of supplying a plurality of heat sources to the inside of the vessel to heat the raw materials by heat of reaction between the plurality of heat sources; .

The raw materials to be charged into the vessel include an iron source, a raw ore to be reduced, and a reducing agent.

The ore to be reduced is preferably any one of Mn ore, TiO ₂ and V ₂ O ₅ .

The hot air may include at least one of pure oxygen (O ₂ ) and air.

It is preferable that the plural heat source materials include a material containing carbon (C) and oxygen (O ₂ ).

It is preferable to use at least one of coal and graphite powder as the material containing carbon (C).

And heating the raw material by heat of reaction between the product generated by the reaction between the plurality of heat sources and the hot air.

According to the embodiments of the present invention, the raw material is heated by the hot air, the first reaction heat, and the second reaction heat by spraying the hot air to the upper side of the vessel and spraying the first and second heat sources to the lower side. Accordingly, the raw material can be uniformly heated as compared with the prior art, and local heating of the raw material can be prevented.

Further, by controlling the supply amount of the hot air and the first heat source and the second heat source, the raw material can be heated to various temperature ranges. Accordingly, the supply amount of the hot air and the first heat source and the second heat source may be controlled according to the kind of the raw material, so that the reducing temperature of the charged raw material can be controlled. Therefore, the temperature can be easily controlled as compared with an arc furnace. In addition, there is an effect that the cost is reduced as compared with the heating method by the aluminum (Al) thermite reaction.

1 is a cutaway perspective view illustrating a heat treatment apparatus according to an embodiment of the present invention;
2 is a cross-sectional view for explaining the heating of a raw material in a container by a heat treatment apparatus according to an embodiment of the present invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of other various forms of implementation, and that these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know completely.

1 is a perspective view illustrating a heat treatment apparatus according to an embodiment of the present invention.

Referring to FIG. 1, a thermal processing apparatus 200 according to an embodiment of the present invention includes a first heat source supply unit 210 for supplying hot air as a first heat source to an upper side of a container 100, And a second heat source supply unit 200 for supplying the second heat source to the lower side.

The container 100 according to the embodiment is a transformer used in a conventional steelmaking operation. However, the container 100 is not limited to the converter, and various means for accommodating the raw material to be melted are applicable, for example, a blast furnace. In addition, a raw material for manufacturing molten steel is charged in the vessel 100, and the raw material includes a raw material such as iron ore, an iron source, an additive, and a reducing agent. Here, the additive material may be variously changed depending on the type of steel to be produced, for example, Mn ore, TiO ₂ and V ₂ PO ₅ . In addition, the reducing agent is used to reduce the additive. In the embodiment, a reducing agent containing C or Al is used.

In the above description, the solid iron source is charged into the vessel 100, but the present invention is not limited thereto, and molten iron in the furnace may be charged.

The first heat source supply unit 210 includes a first hot air supply unit 212 for supplying hot air and a lance for supplying hot air to the upper side of the inside of the container 100 And a first supply line 213 having one end connected to the first hot air supply unit 212 and the other end connected to the lance 211. Hot air has a temperature of 1800 ° C to 1300 ° C, and is a gas or gas state, and is a material containing oxygen (O ₂ ). In the embodiment, any one of air (air, air) and pure oxygen (O 2) is used as hot air.

The first hot air supply unit 212 supplies the hot air to the first supply line 213 and the lance 211 as described above. The hot air supply unit 212 is disposed outside the container 100, And a heater for heating the hot air source stored in the reservoir or the reservoir. Here, the hot air raw material is any one of oxygen (O ₂ ) -containing materials such as air, air and pure oxygen (O ₂ ) in an unheated state, and the hot air raw material is heated by a heater to 800 ° C. Lt; RTI ID = 0.0 > 1300 C. < / RTI > A first supply line 213 is connected to the first hot air supply unit 212. The first supply line 213 may be a pipe having an internal space through which hot air can move.

In the above description, the first hot air supply unit 212 is composed of a reservoir for storing the hot air raw material and a heater for heating the hot air raw material. However, the first hot air supply unit 212 is not limited to the above-described configuration, and various configurations or structures that can provide hot air to the first supply line 213 and the lance 211 can be used.

The lance 211 injects hot air into the container 100, one end of which is charged into the upper side of the container, and the other end thereof is connected to the first supply line 213. Therefore, hot air passing through the first hot air supply unit 212 and the first supply line 213 is injected into the container 100 through the lance 211. At this time, the hot air jetted from the upper side of the vessel 100 acts as a heat source for heating and melting the iron source, the subsidiary raw material and the reducing agent (hereinafter collectively referred to as "raw material") charged into the vessel 100.

Also, the hot air reacts with the product generated by the reaction between the first heat source and the second heat source supplied from the second heat source supply unit 200, and the raw material is heated by the reaction heat generated at this time. That is, hot air not only directly heats the raw material but also generates reaction heat. Therefore, the hot air uses a material containing oxygen (O ₂ ) -containing material including a substance that is oxidized and reacted with the product generated by the reaction between the first heat source and the second heat source.

The second heat source supply unit 200 includes a heat source storage unit 223a for storing or providing a plurality of mutually reacting heat sources and a heat source storage unit 223b having one end penetrating a lower portion of the container 100, A supply member 221 for supplying a plurality of heat sources, and a second supply line 223b having one end connected to the heat source storage portion 223a and the other end connected to the supply member 221. [ In addition, including a refrigerant stirred storage portion, for example a gas, for example N ₂ for CH ₄ refrigerant storage section (223b), stirred for storing the stored (223c) for cooling the supply member 221, the cooling medium storing portion ( 223b and the agitator storage portion 223c are connected to the second supply line 223b.

In the heat source storage part 223a, two heat sources that are mutually reactive, preferably oxidation, are stored as described above. The first reaction material is oxygen (O2) and the second reaction material is carbon . In the embodiment, any one of coal (Cola) and graphite powder is used as the second reaction material, but not limited thereto, various materials containing carbon (C) can be used. Here, since heat is generated by the oxidation reaction between the first reaction material and the second reaction material, the first reaction material is referred to as a 'first heat source material' and the second reaction material is referred to as a 'second heat source material'.

The supply member 221 supplies the first heat source and the second heat source to the lower portion of the container 100 and at least one end thereof is inserted into the lower portion of the container and installed to communicate with the inside of the container 100. The supply member 221 may be a pipe having an inner space through which the first and second heat sources can pass. A plurality of supply members 221 according to the embodiment are provided and are spaced apart from each other, and the first heat source and the second heat source are supplied together in the respective supply members 221. When a plurality of the supply members 221 are provided, it is preferable that the lances 211 are provided so as to correspond to the upper portion of the center between the plurality of supply members 221 spaced from each other. When the first and second heat sources are supplied into the container 100 through the supply member 221, the first heat source and the second heat source react within the container 100 having a predetermined heat. At this time, even if the first heat source and the second heat source are supplied together through the single supply member 221, the inside of the supply member 221 does not have a high temperature enough to cause mutual reaction, so that no reaction occurs. Thus, when the first heat source and the second heat source are supplied into the vessel 100, an oxidation reaction occurs and the raw material is heated by the heat of oxidation reaction generated at this time. In other words, when oxygen (O ₂ ), which is a first heat source, and a second heat source, such as coal, are supplied into the vessel, the oxygen (O ₂ ) and the carbon (C) (Hereinafter referred to as a first reaction) to produce carbon monoxide (CO). The raw material is heated by the heat generated during the oxidation reaction (hereinafter referred to as the first reaction heat).

In the following, a product produced by the reaction of the first heat source and the second heat source is referred to as a 'primary product'.

In addition, in the vessel 100, not only the oxidation reaction (primary reaction) between the first heat source and the second heat source, but also the reaction of the supplied first heat source and the raw materials contained in the vessel 100, Carbon (C) undergoes oxidation reaction, and the oxidation reaction heat generated at this time also helps to raise the temperature of the raw material.

Then, the oxygen contained in that a carbon monoxide (CO) a primary product generated by the first reaction hot air (O ₂₎ and oxidation (hereinafter, referred to as the second reaction), the carbon dioxide a secondary product (CO ₂₎ Is generated. The raw material is heated by the heat generated during the secondary reaction (hereinafter referred to as the secondary reaction heat).

As described above, in the present invention, the raw material is heated by the hot air, the first reaction heat, and the second reaction heat by jetting the hot air containing oxygen (O ₂ ) and spraying the first heat source and the second heat source that are oxidized . In addition, by supplying hot air to the upper side of the container 100 and supplying the first and second heat sources to the lower side, the heat generated by the hot air transmitted from the upper side to the lower side of the container 100, The raw material is uniformly heated as compared with the conventional one due to the heat of the first reaction heat transferred to the upper side and the secondary reaction heat caused by the reaction between the hot air and the first product.

FIG. 2 is a cross-sectional view illustrating the heating of a raw material in a vessel by a heat treatment apparatus according to an embodiment of the present invention. FIG. Hereinafter, a raw material heat treatment method using the heat treatment apparatus according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG.

First, the raw material for the steel to be manufactured is charged into the vessel 100, preferably the converter. In the embodiment, a reducing agent containing an iron source, Mn ore as an additive, and C (carbon) is charged into the vessel 100. Of course, a variety of materials such as TiO ₂ and V ₂ O ₅ may be used as the additive, and a reducing agent containing a variety of reducing agents, such as C, which can reduce the additive can also be used.

Then, the raw materials contained in the container 100, that is, the iron ores, the additives, and the reducing agent are heated using the heat treatment apparatus 200 according to the embodiment of the present invention. To this end, the first heat source oxygen (O ₂ ) and the second heat source are supplied into the vessel 100 using the second heat source supply unit 200. In this embodiment, the second heat source supplies coal . The first heat source and the second heat source are supplied to the lower portion of the vessel 100 through the supply member of the second heat source supply unit 200 and are supplied with oxygen O ₂ as the first heat source and coal as the second heat source Carbon (C) contained in the carbon monoxide (CO) is oxidized to produce carbon monoxide (CO). At this time, the raw material is heated by the first reaction heat generated during the coral reaction between oxygen (O ₂ ) and carbon (C). Also, during the oxidation reaction of the first heat source and the second heat source, the carbon (C) contained in the first heat source and the iron source is oxidized and the generated heat assists the heating of the raw material.

When the raw material is heated to a predetermined temperature by the first heat of reaction by the second heat source supply unit 200, hot air is sprayed onto the upper side of the container 100 using the first heat source supply unit 210. More specifically, air at 800 ° C to 1300 ° C is supplied by a lance through the first hot air supply unit 212 and the first supply line 213 of the first heat source supply unit 210. Therefore, the hot air supplied to the lance 211 is injected into the container 100. Since the lance 211 according to the embodiment is installed to be inserted or charged into the interior of the container 100, do. Since the hot air blown into the container 100 through the lance 211 has a high temperature of 800 ° C to 1300 ° C as described above, the raw material is heated by the heat of the hot air.

(CO) produced by the first reaction between oxygen (O ₂ ) and carbon (C) is burned by the secondary reaction (oxidation reaction), and carbon dioxide (CO 2) Is generated. That is, a secondary reaction heat is generated by the oxidation reaction between carbon monoxide (CO), which is a primary product generated by the first reaction, and oxygen (02), which is contained in hot air sprayed from the upper side, Is heated. And CO _{2, which} is a secondary product, is discharged to the upper side of the vessel.

Also, the hot air is sprayed by using the first heat source supply unit 210 as described above, and the first and second heat sources are continuously supplied by using the second heat source supply unit 200, And is heated to a temperature at which it can be melted and reduced. At this time, the temperature inside the container can be controlled by adjusting the supply amount and time of the hot air, the first and second heat sources.

On the other hand, while supplying the hot air, the first heat source and the second heat source, stirring gas such as N2 may be supplied into the supplying member to stir the raw materials in the container.

In the above description, the hot air is first blown by using the second heat source supply unit 200, and then the first and second heat sources are supplied by using the second heat source supply unit 200. [ However, the present invention is not limited to this, and hot air and the first and second heat sources may be supplied at the same time, or hot air may be supplied first.

When the raw material in the vessel 100 is heated and melted by the heat treatment apparatus 200 according to the embodiment of the present invention and the raw material reaches the reduction temperature, Mn ore, which is a raw material, is reduced (reduced) by C , Ferromanganese is produced. In this operation, slag is generated. In order to melt the slag, any one of calcium oxide (CaO), alumina (Al ₂ O ₃ ) and silicon oxide (SiO ₂ ) is charged.

Further, after the raw material is melted and reduced, a coolant such as CH ₄ may be supplied to the supply member 221 to cool the supply member 221.

In the above description, Mn ore is added as an additive and Al is added as a reducing agent. However, the present invention is not limited to this, and various additives and reducing agents may be added thereto, and the reducing temperature may vary depending on the kind of the additive and the reducing agent. Thus, in this embodiment, the heat source and the first and second supply amounts are controlled depending on the kinds of the sub materials and the reducing agent to adjust the temperature to the reduction temperature.

As described above, in the present embodiment, the hot air which is the first heat source is supplied to the upper side of the vessel 100, and the first heat source and the second heat source are injected to the lower side of the vessel 100, , And the raw material is heated by the secondary reaction heat. In addition, by supplying hot air to the upper side of the container 100 and supplying the first and second heat sources to the lower side, the heat generated by the hot air transmitted from the upper side to the lower side of the container 100, As the raw material is heated by the first reaction heat transferred to the upper side and the second reaction heat generated by the reaction between the hot air and the primary product, the raw material is uniformly heated as compared with the prior art. That is, it is possible to prevent the raw material from being locally heated as in the conventional case.

By controlling the supply amount of the hot air and the first heat source and the second heat source, the raw material can be heated to various temperature ranges. Accordingly, the supply amount of the hot air and the first heat source and the second heat source may be controlled according to the kind of the raw material, so that the reducing temperature of the charged raw material can be controlled. Therefore, the temperature can be easily controlled as compared with an arc furnace. In addition, there is an effect that the cost is reduced as compared with the heating method by the aluminum (Al) thermite reaction.

100: container 210: first heat source supply unit
220: second heat source supply unit

Claims (12)

A heat treatment apparatus for heat treating a raw material contained in a container,
A first heat source supply unit installed so as to be charged upside of the inside of the container, and a lance which blows hot air to heat the raw material into the container; And
A second heat source supply unit including a supply member which is inserted into a lower portion of the container and which is disposed to face the lance and supplies a plurality of heat sources for generating a first reaction heat by mutual oxidation reaction within the container;
/ RTI >
Wherein the second heat source supply unit comprises:
A plurality of heat sources for mutual oxidation reaction are stored, and a heat source storage unit connected to the supply member;
A refrigerant storage portion connected to the supply member and storing a refrigerant for cooling the supply member;
An agitator storage unit connected to the supply member and storing an agitating gas for agitating the raw materials in the container;
/ RTI > delete delete The method according to claim 1,
Wherein the plurality of supply members are spaced apart from each other. The method of claim 4,
Wherein the lances are located on the upper side of the central portion between the plurality of supply members spaced apart from each other. Charging a raw material containing an iron source, a raw ore to be reduced and a reducing agent into a vessel; And
Heating the raw material to adjust the raw material to a reducing temperature to reduce the ore and the reducing agent;
/ RTI >
The process of adjusting the raw material to a reduction temperature includes:
A step of supplying a plurality of heat sources which are mutually oxidized to the inside of the vessel and heating the raw materials by a first reaction heat caused by an oxidation reaction between the plurality of heat sources;
Heating the raw material by supplying hot air containing a substance that is oxidized to a product generated by an oxidation reaction between the plurality of heat sources to the inside of the container;
Heating the raw material with a second reaction heat generated by an oxidation reaction between the product generated by the oxidation reaction between the plurality of heat sources and the hot air; And
Supplying the hot air and the plurality of heat sources into the container to supply the stirring gas into the container while heating the raw material to stir the raw material;
/ RTI >
And adjusting the supply amount and the supply time of the hot air and the plurality of heat sources to adjust the reducing temperature of the raw material. delete The method of claim 6,
Wherein the ore to be reduced is any one of Mn ore, TiO ₂ and V ₂ O ₅ . The method of claim 6,
Wherein the hot air includes at least one of pure oxygen (O ₂ ) and air. The method of claim 6,
Wherein the plurality of heat sources comprises oxygen (O ₂ ) and a material containing carbon (C). The method of claim 10,
Wherein at least one of coal and graphite powder is used as a material containing carbon (C). delete

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