KR200294161Y1 - A furnace capable of a automatically pre-heating the refractory - Google Patents
A furnace capable of a automatically pre-heating the refractory Download PDFInfo
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- KR200294161Y1 KR200294161Y1 KR2019980014915U KR19980014915U KR200294161Y1 KR 200294161 Y1 KR200294161 Y1 KR 200294161Y1 KR 2019980014915 U KR2019980014915 U KR 2019980014915U KR 19980014915 U KR19980014915 U KR 19980014915U KR 200294161 Y1 KR200294161 Y1 KR 200294161Y1
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- South Korea
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- converter
- city gas
- oxygen
- refractory
- oxygen jet
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/44—Refractory linings
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings ; Increasing the durability of linings; Breaking away linings
- F27D1/1678—Increasing the durability of linings; Means for protecting
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
본 고안은 내화물의 자동예열이 가능한 전로에 관한 것으로서, 특히 제강공정시 전로에서 신로 작업전에 도시가스나, 코크스를 열원으로 이용하여 전로 내부에 축조된 내화물을 가열하여 온도를 1200℃까지 상승시킴으로서 급작스런 온도상승에 의한 열팽창으로 내화물이 파손되는 것을 방지하기위한 내화물의 자동예열이 가능한 전로에 관한 것이다.The present invention relates to a converter capable of automatic preheating of refractory, and in particular, in the steelmaking process, the city is heated by heating the refractory built in the converter using city gas or coke as a heat source before the furnace operation, thereby raising the temperature to 1200 ° C. The present invention relates to a converter capable of automatic preheating of a refractory to prevent the refractory from being broken by thermal expansion due to temperature rise.
본 고안은 전로의 상부에서 윈치모터에 의하여 상하이동 가능하며, 밸브를 구비하여 전로의 내부에 산소를 공급하는 산소제트랜스와, 상기 전로의 출강구에 삽입되어 도시가스를 공급하는 도시가스 버너로 이루어진 내화물의 예열이 가능한 전로에서, 상기 전로의 상부에 설치되는 전기아크 발생기와, 상기 전로의 측면에 설치되는 온도계와, 상기 산소제트랜스와 연통되어 도시가스를 공급하기 위한 도시가스 유량조절수단과, 상기 산소제트랜스와 연통되어 질소를 공급하기 위한 질소고속 밸브와, 상기 온도계에서 감지된 신호에 의하여 상기 질소고속 밸브, 도시가스 유량조절수단, 전기아크 발생기, 윈치모터를 각각 제어하는 PLC로 이루어져 상기 전로에 상기 산소제트랜스에 혼입되는 도시가스 및 산소에 의하여 전로를 예열한후 상기 질소를 신속히 공급하므로서 역화를 방지할 수 있는 것을 특징으로 한다.The present invention can be moved by the winch motor in the upper part of the converter, the oxygen jet transformer for supplying oxygen to the inside of the converter having a valve and the city gas burner inserted into the exit of the converter to supply the city gas In the converter capable of preheating the refractory made, the electric arc generator installed on the top of the converter, the thermometer installed on the side of the converter, the city gas flow rate control means for supplying the city gas in communication with the oxygen jet transformer and And a nitrogen high speed valve in communication with the oxygen jet transformer for supplying nitrogen, and a PLC for controlling the nitrogen high speed valve, the city gas flow control means, the electric arc generator, and the winch motor by signals detected by the thermometer. After preheating the converter by the city gas and oxygen mixed into the oxygen jet transformer in the converter, the nitrogen is replaced. It characterized in that to avoid the Hi supply hameuroseo backfire.
Description
본 고안은 내화물의 자동예열이 가능한 전로에 관한 것으로서, 특히 제강공정시 전로에서 신로 작업전에 도시가스나, 코크스를 열원으로 이용하여 전로 내부에 축조된 내화물을 가열하여 온도를 1200℃ 까지 상승시킴으로써 급작스런 온도상승에 의한 열팽창으로 내화물이 파손되는 것을 방지하기 위한 내화물의 자동예열이가능한 전로에 관한 것이다.The present invention relates to a converter capable of automatic preheating of refractory, and in particular, in the steelmaking process, by heating the refractory built in the converter using city gas or coke as a heat source before the furnace operation, the temperature is raised to 1200 ° C. The present invention relates to a converter capable of automatic preheating of a refractory to prevent the refractory from being broken by thermal expansion due to temperature rise.
도 1은 종래의 전로 승열상황을 나타내는 도면으로서, 새로운 전로(1)의 내화물은 급격한 온도의 상승에 의하여 파손될 염려가 있다. 따라서 전로(1)를 가동하기 전에 전로의 내화물을 미리 서서히 가열한 후, 전로를 가동하게 된다. 이를 위하여 종래에는 전로의 상부에는 산소제트랜스(2)가 설치되어 있다.FIG. 1 is a view showing a conventional converter heating up situation, and the refractory of the new converter 1 may be damaged by a sudden rise in temperature. Therefore, before the converter 1 is operated, the refractory of the converter is gradually heated in advance, and then the converter is operated. To this end, conventionally, the oxygen jet transformer 2 is installed at the top of the converter.
산소제트랜스(2)는 상부의 윈치모터(winch moter; 4)에 의하여 상,하로 이동할 수 있다. 산소제트랜스(2)의 일측에는 산소유량 콘트롤 밸브(13) 및 산소 고속스피드 밸브(12)가 설치된다. 또한, 산소의 역류를 방자하기 위하여 체크 밸브(14)가 설치된다.The oxygen jet transformer 2 may be moved up and down by a winch motor 4 of the upper portion. An oxygen flow rate control valve 13 and an oxygen high speed speed valve 12 are installed at one side of the oxygen jet transformer 2. In addition, a check valve 14 is provided to prevent backflow of oxygen.
전로(1)의 출강측에는 도시가스버너(17)가 설치되어 있으며, 도시가스버너 (7)의 측면에는 작업대(18)가 설치된다. 도시가스버너(17)와 연결된 라인에는 도시가스 수동밸브(19) 및 도시가스 유량조절 수동밸브(20)가 설치된다. 윈치모터(4) 및 산소유량 콘트롤 밸브(13), 산소 고속 스피드 밸브(12)를 제어하기 위한 제어기(PLC:programmable logic controller;8)가 설치된다. 한편, 도면번호 3은 플랙시블 호스, 6은 모드전환 키보드, 7은 감시모니터이다.The city gas burner 17 is provided in the tapping side of the converter 1, and the work bench 18 is provided in the side of the city gas burner 7. As shown in FIG. A line connected with the city gas burner 17 is provided with a city gas manual valve 19 and a city gas flow control manual valve 20. A controller (PLC: programmable logic controller) 8 for controlling the winch motor 4, the oxygen flow rate control valve 13, and the oxygen high speed speed valve 12 is provided. On the other hand, 3 is a flexible hose, 6 is a mode switching keyboard, 7 is a monitoring monitor.
전로(1)내의 내화물을 가열하기 위하여 도시가스 버너(17)에 미량의 도시가스를 투입한 후 도시가스 버너(17)에 점화를 한다. 이후에 산소제트랜스(2)에 산소를 공급하고, 산소유량 콘트롤 밸브(13)를 연다. 또한 도시가스 수동밸브(19)를 열어서 도시가스 버너(17)의 화력을 상승시킨다. 이와 같이 하여 전로(1)내의 내화물 온도가 1200℃에 이를때까지 가열한다.In order to heat the refractory in the converter 1, a small amount of city gas is put into the city gas burner 17, and the city gas burner 17 is ignited. Thereafter, oxygen is supplied to the oxygen jet transformer 2 and the oxygen flow control valve 13 is opened. In addition, the city gas manual valve 19 is opened to increase the thermal power of the city gas burner 17. In this way, the refractory temperature in the converter 1 is heated until it reaches 1200 degreeC.
상기 내화물을 예열하는 방법은 상술한 도시가스 버너(17)을 이용하는 방법외에 신로 승열시 노내에 코크스를 투입하고, 산화열을 이용하는 방법도 있다.The method of preheating the refractory includes a method in which coke is introduced into a furnace during heating up of a furnace in addition to the method of using the city gas burner 17 described above, and an oxidation heat is used.
그러나 상기와 같은 승열방법은 작업시 작업대(18)의 설치, 출강구에 도시가스버너(17)의 설치가 필요하고, 도시가스 량의 증감을 수동으로 작업함으로 6∼7시간 동안 지속되는 작업에 어려운 점이 많으며, 작업자가 많이 필요한 문제점이 있다.However, the heating method as described above requires the installation of the workbench 18 at the time of operation, the installation of the city gas burner 17 at the exit port, and the work lasting for 6 to 7 hours by manually increasing or decreasing the amount of city gas. There are many difficulties, and there is a problem that requires a lot of workers.
본 고안은 상술한 문제점을 해결하기 위한 것으로서, 신로 승열시 내화물의 예열을 자동화함으로써, 작업의 안정성 및 효율성을 확보할 수 있는 내화물의 자동예열이 가능한 전로를 제공하는 데 그 목적이 있다.The present invention is to solve the above-mentioned problems, the object of the present invention is to provide a converter capable of automatic preheating of the refractory to ensure the stability and efficiency of the operation by automating the preheating of the refractory during the heating up.
도 1은 종래의 전로 승열상황을 나타내는 도면.1 is a view showing a conventional converter heating situation.
도 2는 본 고안에 의한 내화물의 자동예열이 가능한 전로를 나타내는 도면.2 is a view showing a converter capable of automatic preheating of the refractory according to the present invention.
〈도면의 주요 부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>
1 : 전로 2 : 산소제트랜스1: converter 2: oxygen jet transformer
3 : 플랙시블 호스 4 : 윈치모터3: flexible hose 4: winch motor
9 : 도시가스 고속스피드 밸브 10 : 도시가스 유량 콘트롤밸브9: City gas high speed speed valve 10: City gas flow control valve
11 : 질소고속 밸브 12 : 산소 고속스피드 밸브11: nitrogen high speed valve 12: oxygen high speed valve
13 : 산소유량 콘트롤밸브13: oxygen flow control valve
이하, 첨부된 도면을 참조하여 본 고안을 설명한다.Hereinafter, the present invention will be described with reference to the accompanying drawings.
도 2는 본 고안에 의한 내화물의 자동예열이 가능한 전로를 나타내는 도면으로서, 본 고안은 산소제트랜스(2), 윈치모터(4), 전기아크 발생기(23), 질소고속 밸브(11), 도시가스 유량조절수단(9,10), 제어기(PLC;8)로 구성되어 있다.2 is a view showing a converter capable of automatic preheating of the refractory according to the present invention, the present invention is an oxygen jet transformer (2), winch motor (4), electric arc generator (23), nitrogen high-speed valve (11), shown It consists of gas flow rate control means 9 and 10 and a controller (PLC) 8.
산소제트랜스(2)는 전로(1)의 상부에서 윈치모터(4)에 의하여 상,하로 이동할 수 있도록 설치된다. 윈치모터(4)의 측면에는 캠리미트(5)가 설치된다. 산소제트랜스(2)의 단부에는 플랙시플 호스(3)가 연결되어 있고, 플랙시블 호스의 단부에는 산소유량 콘트롤 밸브(13) 및 산소고속 스피드 밸브(12)가 설치된다.The oxygen jet transformer 2 is installed to move up and down by the winch motor 4 in the upper portion of the converter 1. The cam limit 5 is installed on the side of the winch motor 4. A flexible hose 3 is connected to an end of the oxygen jet transformer 2, and an oxygen flow rate control valve 13 and an oxygen high speed speed valve 12 are installed at an end of the flexible hose.
한편, 산소유량 콘트롤 밸브(13) 및 산소고속 스피드 밸브(12)에는 산소공급부(도시되지 않음)가 연결되어 있다. 또한, 산소의 역류를 방지하기 위하여 체크밸브(14)가 설치되어 있다.On the other hand, an oxygen supply part (not shown) is connected to the oxygen flow rate control valve 13 and the oxygen high speed speed valve 12. In addition, a check valve 14 is provided to prevent backflow of oxygen.
또한, 전로(1)의 상부에는 전기아크 발생기(23)가 설치되며, 전로(1)의 측면에는 온도계(16)가 설치된다. 질소고속 밸브(11)는 역화를 방지하기 위한 것으로서, 플랙시블 호스(3)의 일단에 연결되어 있다. 또한, 도시가스 유량조절수단 (9,10)은 플랙시블 호스(3)의 일측과 연통되어 있다.In addition, an electric arc generator 23 is installed above the converter 1, and a thermometer 16 is provided on the side of the converter 1. The nitrogen high speed valve 11 is for preventing backfire and is connected to one end of the flexible hose 3. In addition, the city gas flow rate adjusting means 9 and 10 communicate with one side of the flexible hose 3.
상기 도시가스 유량조절수단은 도시가스 유량 콘트롤 밸브(10) 및 도시가스 고속 스피드밸브(9)로 이루어져 있다. 도시가스 유량 콘트롤 밸브(10) 및 도시가스 공급부(도시되지 않음)가 연결된 도시가스 고속 스피드밸브(9)도 플랙시블 호스(3)의 일단에 연결되어 있다. 한편, 질소고속 밸브(11)에는 질소공급부(도시되지 않음)가 연결되어 있다.The city gas flow rate adjusting means includes a city gas flow rate control valve 10 and a city gas high speed speed valve 9. The city gas high speed speed valve 9 to which the city gas flow control valve 10 and the city gas supply part (not shown) are connected is also connected to one end of the flexible hose 3. On the other hand, the nitrogen high speed valve 11 is connected to a nitrogen supply unit (not shown).
상기 제어기(PLC;8)는 윈치모터(4) 및 온도계(16), 전기아크 발생기(23), 산소유량 콘트롤 밸브(13) 및 산소고속 스피드 밸브(12), 도시가스 유량 콘트롤 밸브(10) 및 도시가스 고속 스피드밸브(9)에 연결되어 각각의 부품을 제어하며, 도면 중 미설명 부호 6은 모드전환 키보드, 7은 감시모니터, 22는 도시가스 배관이다.The controller PLC 8 includes a winch motor 4 and a thermometer 16, an electric arc generator 23, an oxygen flow rate control valve 13, an oxygen high speed speed valve 12, and a city gas flow rate control valve 10. And connected to the city gas high-speed speed valve (9) to control each part, in the drawings, reference numeral 6 is a mode switching keyboard, 7 is a monitoring monitor, 22 is a city gas piping.
이하, 첨부된 도면을 참조하여 본 고안의 작동 및 기능에 대하여 설명한다.Hereinafter, with reference to the accompanying drawings will be described the operation and function of the present invention.
도 2에 도시된 바와 같이, 상기 산소유량 콘트롤 밸브(13) 및 도시가스 유량 콘트롤밸브(10)를 개방한 후, 전기아크 발생기(23)에 의하여 점화시킨다. 이에 따라 전로(1)의 내화물은 서서히 가열되어 상기 온도계(16)에 의한 온도감지를 통해800℃∼1200℃가 되었을 때 열팽창에 의한 파손이 줄어들게 되어 노체 사용회수를 향상시킬 수 있게 된다.As shown in FIG. 2, the oxygen flow control valve 13 and the city gas flow control valve 10 are opened, and then ignited by the electric arc generator 23. Accordingly, when the refractory of the converter 1 is gradually heated to 800 ° C. to 1200 ° C. through the temperature sensing by the thermometer 16, breakage due to thermal expansion is reduced, thereby improving the number of times the furnace body is used.
이후, 상기 모드전환 키보드(6)를 누르면 산소제트랜스(2)는 승열위치에서 멈추고, 이를 캠리미트(5)에서 감지하여 제어기(PLC)(8)로 보내면 제어기(PLC)에서 도시가스 고속 스피드 밸브(9)를 열리도록 하고, 도시가스 유량 콘트롤밸브(10)를 열어 상기 도시가스 배관(22)를 통해 도시가스가 흐르도록 하여 산소제트랜스(2) 선단에서 전기아크 발생기(23)에 의하여 자동으로 점화 된다.Thereafter, when the mode switching keyboard 6 is pressed, the oxygen jet transformer 2 stops in the ascending position. The oxygen limit is detected by the cam limit 5 and sent to the controller PLC 8. The valve 9 is opened, and the city gas flow control valve 10 is opened to allow the city gas to flow through the city gas pipe 22 so that the electric arc generator 23 at the tip of the oxygen jet transformer 2. It will ignite automatically.
또한, 산소 고속 스피드 밸브(12)가 열리고 산소유량 콘트롤 밸브(13)가 열려 도시가스와 함께 나오면서 완전연소가 이루어지게 된다. 이후에 시간의 흐름에 따라 제어기(PLC)(8)에 입력된 승열패턴에 의하여 산소유량 콘트롤 밸브(13)가 작동되고, 도시가스 유량 콘트롤밸브(10)도 동작하여 승열이 종료되면 도시가스 고속스피드 밸브(9)와 산소 고속 스피드 밸브(12)가 자동으로 닫힌다. 이후에 질소 고속 밸브(11)가 15초 동안 열림으로서 잔류산소 및 도시가스에 의한 역화를 방지하는 제어를 하게 된다.In addition, the oxygen high speed speed valve 12 is opened and the oxygen flow rate control valve 13 is opened to come out with the city gas to complete combustion. Thereafter, the oxygen flow control valve 13 is operated by the heating pattern inputted to the controller (PLC) 8 according to the passage of time, and the city gas flow control valve 10 is also operated so that the city gas high speed is completed. The speed valve 9 and the oxygen high speed speed valve 12 are automatically closed. Thereafter, the nitrogen high speed valve 11 is opened for 15 seconds to control the backfire caused by residual oxygen and city gas.
이상에서와 같이, 본 고안의 내화물의 자동예열이 가능한 전로에 따르면, 전로 승열시 출강측에 작업대와 도시가스 버너를 삽입하는 번거로운 작업을 없애고, 마무리 작업시간을 단축시키며 설비를 보다 효율적으로 사용할 수 있다. 또한 전로의 내화물이 급격한 온도 변화에 의하여 균열되는 것을 방지함으로서 수명을 연장할 수 있는 효과가 있다.As described above, according to the converter capable of automatic preheating of the refractory of the present invention, eliminating the cumbersome work of inserting the workbench and city gas burner on the tapping side when the converter is heated up, shortening the finishing work time and using the equipment more efficiently. have. In addition, there is an effect that can extend the life by preventing the refractory of the converter is cracked by a sudden temperature change.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019980014915U KR200294161Y1 (en) | 1998-08-07 | 1998-08-07 | A furnace capable of a automatically pre-heating the refractory |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019980014915U KR200294161Y1 (en) | 1998-08-07 | 1998-08-07 | A furnace capable of a automatically pre-heating the refractory |
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| Publication Number | Publication Date |
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| KR20000004463U KR20000004463U (en) | 2000-03-06 |
| KR200294161Y1 true KR200294161Y1 (en) | 2003-01-14 |
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| KR100342657B1 (en) * | 2000-06-20 | 2002-07-02 | 서재호 | Method of and apparatus for controlling burners of industrial furnace by temperature tracking |
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