KR100775499B1 - Steel tapping measuring apparatus of refining furnace - Google Patents

Steel tapping measuring apparatus of refining furnace Download PDF

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Publication number
KR100775499B1
KR100775499B1 KR1020060129675A KR20060129675A KR100775499B1 KR 100775499 B1 KR100775499 B1 KR 100775499B1 KR 1020060129675 A KR1020060129675 A KR 1020060129675A KR 20060129675 A KR20060129675 A KR 20060129675A KR 100775499 B1 KR100775499 B1 KR 100775499B1
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South Korea
Prior art keywords
frame
molten steel
refining furnace
optical sensor
sensing device
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KR1020060129675A
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Korean (ko)
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정성원
우경회
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주식회사 포스코
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B22D11/182—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B22D11/185—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using optical means
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

An equipment for measuring a tapping temperature of a refining furnace is provided, wherein the equipment can automatically perform emergency erection of the refining furnace in a PLC(Programmable Logic Control) room after displaying the outflow of molten steel by a molten steel outflow sensor when molten steel flows out in the early stage of the tapping operation even while an operator performs a tapping operation in a refining furnace operating room. An equipment for measuring a tapping temperature of a refining furnace comprises: a sensing device mounted on a central bottom within a motor room(210) such that the sensing device corresponds with a cassette on the bottom of a ladle; a frame(16) that forms an external appearance of the sensing device; fixing guides(14) installed at both sides of an upper surface of the frame to fix the frame; an optical sensor(17) embedded in the frame; a glass hole(18)formed on a front face of the frame to guide forward a light generated from the optical sensor; a cable(13) for transmitting a detection signal of the optical sensor; a pipe(15) installed on a side face of the frame to protect the cable; and a cover(11) installed on the upper surface of the frame to cut off alien substances that flow into the frame.

Description

정련로 출강온도 측정장치{Steel tapping measuring apparatus of refining furnace}Steel tapping measuring apparatus of refining furnace

도 1은 정련로 용강래들 이동 상황도.1 is a molten steel ladle moving situation diagram.

도 2는 용강래들 하부 카세트 부착도.Figure 2 is a molten steel ladle lower cassette attached.

도 3은 용강래들 하부 카세트의 면압 플레이트 오픈시 용강유출 상세도.Figure 3 is a detailed view of the molten steel outflow when the pressure plate of the molten steel ladle lower cassette.

도 4는 용강래들 카세트 면압플레이트 정상 동작 상태도.Figure 4 is a molten steel ladle cassette pressure plate normal operation state.

도 5는 수강대차 모터룸 구성도.5 is a configuration diagram of a water cart motor room.

도 6은 도 5의 'A'부분 사시도.6 is a partial perspective view of portion 'A' of FIG.

도 7은 본 발명에 따른 감지 장치의 광센서 조사 개념 측면도.Figure 7 is a side view of the light sensor irradiation concept of the sensing device according to the present invention.

도 8은 본 발명에 따른 감지 장치의 광센서 조사 개념 정면도.8 is a front view of the light sensor irradiation concept of the sensing device according to the present invention.

도 9는 본 발명에 따른 감지 장치의 광센서 조사 상세 개념도.Figure 9 is a detailed conceptual view of the light sensor irradiation of the sensing device according to the present invention.

도 10은 본 발명에 따른 감지 장치의 프레임을 나타낸 분해 사시도.10 is an exploded perspective view showing a frame of the sensing device according to the present invention.

도 11은 본 발명에 따른 출강중 감지장치 작용도.11 is a functional diagram of the sensing device during tapping in accordance with the present invention.

※도면의 주요부분에 대한 부호의 설명※※ Explanation of symbols about main part of drawing ※

10 : 감지장치 11 : 커버10 detection device 11 cover

13 : 케이블 14 : 고정가이드13: Cable 14: Fixed Guide

15 : 배관 16 : 프레임15: piping 16: frame

17 : 광 센서 18 : 글레스홀17 optical sensor 18 glass hole

150 : 용강래들 151 : 카세트 150: molten steel ladle 151: cassette

210 : 모터룸210: motor room

본 발명은 강을 정련하는 정련로의 정련 완료 후 용강 래들에 용강 출강 중 용강유출시 정련로 자동 비상복귀 장치에 관한 것으로, 더욱 상세하게는 전기로에서 용해된 용탕을 정련로에 장입하여 적절한 아르곤,산소취입에 의한, 탈탄 및 환원탈류조업단계를 거쳐 용강래들에 출강한 후 후공정에서 보다 미세한 온도조정과 합금철투입 후 연속주조공정을 진행하는 단계에 있어서 정련 완료 후 용강래들에 출강작업시 용강래들하단에 설치된 용강 콘트롤장치인 카세트의 면압플레이트가 오픈된상태에서 정련로 출강시 이를 감지하여 정련로가 자동으로 복귀할 수 있는 장치에 관한 것이다. The present invention relates to an automatic emergency return device for the refining furnace when the molten steel is discharged during the tapping of the molten steel ladle after the completion of the refining of the refining furnace for refining the steel, and more specifically, by charging the molten melt in the electric furnace into the refining furnace, After tapping the molten steel ladle through the decarburization and reduction desulfurization operation step by oxygen blowing, and then proceed to the molten steel ladle after refining is completed in the step of performing the fine casting in the post process and the continuous casting process after the alloy is added. It relates to a device for automatically refining the furnace by detecting when the surface pressure plate of the cassette, which is a molten steel control device installed at the bottom of a commercial steel ladle, is opened.

　일반적으로 정련로(100)는 별도의 출강구가 구비되어있지 않고 전기로에서 용해한 용탕을 천정크레인에 의해 운반되어 정련로구로 용탕을 장입후 환원탈류조업단계를 거쳐 정련노구를 통해 용강래들에(150)출강하는 작업에 있어서 통상 출강시간은 1분이내로(100톤 정련로의 경우)완료되는 것이다.In general, the refining furnace 100 is not provided with a separate tap hole, the molten metal melted in the electric furnace is carried by the ceiling crane to charge the molten metal into the refining furnace, and then through the reduction dehydration operation step to the molten steel ladle (refining furnace) ( 150) In the work of tapping, the tap time is normally completed within 1 minute (for 100 tonne refining furnace).

따라서 도 1에서 정련로 출강전 용강래들(150)하단의 용강콘트롤용 카세트(151)에는 면압플레이트(152)를 보호하기 위하여 수강대차 휠러투입위치(200-1) 에서 다수량의 휠러(154)를 투입한 후 정련로 출강지점(240)에 수강대차를 인입하는 것이 일반적인 작업이지만 작업자의 인위적인 실수에 의해 용강래들하단의 카세트(151)에 형성된 면압플레이트(152)를 클로스하지 않고 용강래들(150)을 수강대차(200)에 탑재하는 이상 작업이 간헐적으로 발생되어 단시간내에 출강작업이 완료된 상황에서(통상 출강시간은 1분이내) 용강유출 현상을 발견하여도 도 3에 나타낸 바와 같이 노하피트(300)에 대량의 용강을 유출시켜야하는 작업이 발생되었다.Accordingly, in the molten steel control cassette 151 at the bottom of the molten steel ladle 150 before the tapping in the refining furnace in FIG. 1, a large amount of wheelers 154 at the wheel bore wheeler input position 200-1 to protect the surface pressure plate 152. It is a common operation to introduce a water cart to the refinery tapping point 240 after injecting the steel sheet, but the molten steel plate does not close the pressure plate 152 formed on the cassette 151 at the bottom of the molten steel ladle due to a human mistake. In the situation where the abnormal operation of mounting the field 150 on the water cart 200 occurs intermittently and the tapping work is completed within a short time (usually the tapping time is within 1 minute), the molten steel leakage phenomenon is found as shown in FIG. 3. There has been a task to spill a large amount of molten steel into the pit 300.

종래작업에서 이러한 이상 작업을 방지하기위해 노하에 별도의 설비감시용폐쇄회로 카메라를 구성하여 용강유출현상을 관찰하여 왔으나, 이 또한 실용적이지못한 것으로, 운전실에서 설비를 조작하고 있는 작업자가 폐쇄회로모니터를 관찰하지 못하거나, 관찰하여도 이때는 이미 출강시간이 단시간내 완료된 상황이기 때문에 실용적이지 못하였다.In order to prevent such abnormal work in the conventional work, a separate circuit monitoring camera was installed under the furnace to observe the molten steel leakage phenomenon, but this is also not practical, and the operator operating the equipment in the cab is a closed circuit monitor. If not observed or observed at this time it was not practical because the attendance time was already completed within a short time.

이러한 종래작업의 문제점으로 인하여 설비휴지에 의한 생산성저하 및 생산기회 손실로 인한 원가상승과 유출된 용강의 비상처리 작업시 고열에 의한 작업자의 산업 안전재해 유발의 위험이 발생되는 문제점이 있었다. Due to the problems of the conventional work, there is a problem that a cost increase due to a decrease in productivity and a loss of production opportunity due to facility stoppage and a risk of causing an industrial safety accident of workers due to high heat during emergency treatment of spilled molten steel.

본 발명은 상기한 문제점을 해결하기 위하여 발명한 것으로서, 그 목적은 작업자의 인위적인 작업상의 실수가 발생되어 용강래들 하단의 카세트에 형성된 면압플레이트를 클로스하지 않고 용강래들을 수강대차에 탑재하여 출강작업자가 정련로 운전룸에서 출강작업 중 이라도 출강작업초기에 용강이 유출되는 현상발생시 용강유출감지센서에 의해 이를 디스플레이한 후 피엘씨룸에서 자동으로 정련로가 비 상정립 될 수 있는 정련로 출강온도 측정장치를 제공함에 있다.The present invention has been invented to solve the above problems, the object of the operation is that the worker's artificial operation caused by placing the molten steel lattice on the trolley without closing the pressure plate formed on the cassette under the molten steel Refining furnace tapping temperature measuring device that displays refinement by molten steel outflow sensor in the early stage of tapping work even after tapping in the operation room. In providing.

상기 목적을 달성하기 위한 본 발명의 특징적인 구성을 설명하면 다음과 같다.Referring to the characteristic configuration of the present invention for achieving the above object is as follows.

본 발명의 정련로 출강온도 측정장치는 용강래들 하단의 카세트와 일치할 수 있도록 모터룸내부 중앙하단에는 탑재된 감지장치와, 상기 감지장치의 외형을 이루는 프레임과, 상기 프레임을 고정하도록 상면 양측에 설치된 고정가이드와, 상기 프레임에 내장된 광 센서와, 상기 광 센서에서 발생되는 광을 전방으로 유도하도록 프레임의 전면에 형성된 글레스홀과, 상기 광 센서의 검출신호를 전송하는 케이블과, 상기 케이블을 보호하도록 프레임의 측면에 설치된 배관과, 상기 프레임의 내부로 유입되는 이물질을 차단하도록 프레임의 상면에 설치된 커버를 포함하여서 된 것이다.The refining furnace tap temperature measuring apparatus of the present invention is equipped with a sensing device mounted on the inner bottom of the motor room so as to match the cassette of the bottom of the molten steel ladle, the frame forming the outer shape of the sensing device, and both sides of the upper surface to fix the frame A fixing guide installed in the frame, an optical sensor embedded in the frame, a glass hole formed in the front of the frame to guide the light generated by the optical sensor to the front, a cable transmitting the detection signal of the optical sensor, and the cable It is to include a pipe installed on the side of the frame to protect the cover, and a cover provided on the upper surface of the frame to block foreign matter flowing into the inside of the frame.

이하 첨부된 도면을 참조하여 본발명의 구성에 관하여 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the configuration of the present invention.

도 6에 나타낸 바와 같이 용강수강대차(200)의 후단에는 용강래들(150)을 탑재하여 운반할 수 있는 동력장치의 모터룸(210)이 형성되어 있고, 그 모터룸(210)내부 중앙하단에는 탑재된 용강래들(150) 하단의 카세트(151)와 일치할 수 있는 구조의 감지장치(10)가 설치되어 있다.As shown in FIG. 6, the rear end of the molten steel bogie 200 is provided with a motor room 210 of a power unit capable of mounting and transporting the molten steel ladle 150, and the inner center lower end of the motor room 210. The sensing device 10 has a structure that can match the cassette 151 at the bottom of the molten steel ladle 150 is installed.

상기 감지장치(10)는 모터룸의 바닥면(210-1)에 형성된 홈(210-2)에 설치되는 프레임(16)이 마련되어 있고, 상기 프레임(16)의 양측에는 고정가이드(14)가 설치되어 있으며, 그 고정가이드(14)는 고정볼트(14-1)에 의해 견고히 고정된다.The sensing device 10 has a frame 16 installed in the groove 210-2 formed in the bottom surface 210-1 of the motor room, and fixed guides 14 are provided at both sides of the frame 16. The fixing guide 14 is firmly fixed by the fixing bolt 14-1.

또한 프레임(16)의 내부에는 광 센서(17)가 내장되고 있고, 프레임(16)의 전면에는 상기 광 센서(17)의 빛이 조사될 수 있는 글레스홀(18)이 형성되어 있다.In addition, an optical sensor 17 is built in the frame 16, and a glass hole 18 through which light from the optical sensor 17 is irradiated is formed on the front surface of the frame 16.

한편, 프레임(16)의 측면에는 광 센서(17)에는 케이블(13)이 설치되어 있고, 그 케이블(13)은 프레임(17)의 측면에 설치된 배관(15)에 내장되어 있다.On the other hand, the cable 13 is provided in the optical sensor 17 at the side of the frame 16, and the cable 13 is built in the piping 15 provided in the side of the frame 17. As shown in FIG.

그리고 상기 프레임(17)의 상면에는 모터룸(210)의 내부 및 외부에서 발생되는 분진의 유입을 방지하기 위한 커버(11)가 커버고정볼트(12)에 의해 고정되어 있다.The cover 11 is fixed to the upper surface of the frame 17 by the cover fixing bolt 12 to prevent the inflow of dust generated from the inside and outside of the motor room 210.

이와 같이 구성된 본 발명을 상세히 설명하면 다음과 같다.Referring to the present invention configured as described in detail as follows.

먼저, 도 11에 나타낸 바와 같이 환원탈류 조업단계를 거쳐 수강대차(200)에 탑재된 용강래들(150)에 정련 완료된 용강을 초기출강시 용강이 용강래들(150)하단에 형성된 카세트(151)의 콜렉트노즐(153)로부터 용강이 유출되면 도 7 및 도 8에 나타낸 바와 같이 수강대차(200)의 모터룸(210)바닥에 설치된 감지장치(10)의 광 센서(17)로부터 주사되는 광(20)에 의해서 유출되는 용강의 온도를 감지하여 디스플레이(10-1)한 후 그 온도가 900도 이상이면 정련로 조작PLC(10-2)로 그신호가 전달되어 출강상태의 정련로(100-1)는 자동으로 비상 복귀되어 정련로는 정립상태(100)로 되는 것이다.First, the cassette 151 formed at the bottom of the molten steel ladle 150 at the time of initial tapping of the molten steel refined to the molten steel ladle 150 mounted on the water tank 200 through the reduction dehydration operation step as shown in FIG. 11. When the molten steel flows out from the collect nozzle 153 of FIG. 7, the light scanned from the optical sensor 17 of the sensing device 10 installed on the floor of the motor room 210 of the water tank 200 as shown in FIGS. 7 and 8. After detecting the temperature of the molten steel flowing out by the display (20) and the display (10-1), if the temperature is 900 degrees or more, the signal is transmitted to the refinery operation PLC (10-2) and the refining furnace (100) -1) is automatically returned to the emergency to the upright state (100).

이때 작업자는 용강 수강대차(200)에 탑재된 용강래들(150)하부를 확인하여 응급조치작업을 하게 되면 용강유출을 최소화 할 수 있는 것이다.At this time, the operator can check the lower part of the molten steel ladle 150 mounted on the molten steel cart 200 to minimize the leakage of molten steel.

따라서 일상적인 출강작업에 있어서 수강대차(200)의 모터룸(210)바닥에 설치된 감지장치(10)에 설치된 광센서(17)에서 발생되는 로부터 주사되는 광(20)이 용강래들(150)의 하부로 주사되어 그 온도를 측정하며, 이때 일반적인 온도는 주변복사열과 래들 표면온도를 감안하여 통상350~550도 이다. Therefore, in the daily tapping work, the light beams 20 emitted from the light sensor 17 installed in the sensing device 10 installed on the floor of the motor room 210 of the water tank 200 are molten steel ladle 150. The temperature is scanned to the bottom of and the temperature is measured. In this case, the general temperature is usually 350 ~ 550 degrees considering the ambient radiant heat and ladle surface temperature.

정련후 출강되는 용강의 온도는 적어도 1650도 이상으로 출강되지만 용강이 래들외부로 유출시에는 그 온도는 급격하게 저하되어(대기와 접촉 후 떨어지는 온도) 통상1200~1400도 이다.The temperature of the molten steel that is pulled out after refining is at least 1650 degrees, but when molten steel flows out of the ladle, the temperature is drastically lowered (the temperature falling after contact with the atmosphere), usually 1200 to 1400 degrees.

본 발명에서는 주사되는 광(20)에 의해서 측정되어 디스플레이되는 온도의 범위는 작업상 안정하게 디스플레이하기 위해 유출용강의 온도를 적어도 900도 이상으로 설정하고, 용강래들하부 카세트(151)주변의 대기온도와 복사열을 감안하여 500이하로 설정하여 감지불량에 의한 오작동이 발생되지 않도록 한다.In the present invention, the temperature range measured and displayed by the scanned light 20 is set to at least 900 degrees or more of the outflow molten steel in order to stably display the operation, the atmosphere around the molten steel ladle lower cassette 151 In consideration of temperature and radiant heat, it should be set below 500 to prevent malfunctions due to poor detection.

이와 같이 본 발명은 작업자의 인위적인 작업상의 실수가 발생되어 용강래들하단의 카세트에 형성된 면압플레이트를 클로스하지 않고 용강래들을 수강대차에탑재하여 출강작업자가 정련로 운전룸에서 출강 작업중이라도 출강 작업초기에 용강이 유출되는 현상발생시 용강유출감지센서에 의해 자동으로 정련로가 비상정립될 수 있도록 하여 작업자는 출강작업시 심적인 부담감을 해소할 수 있고, 초기 출강시 극소량의 용강량만 유출되어 신속한 복구 작업과 생산기회손실을 방지함은 물론, 작업자의 산업안전재해를 방지 할 수 있는 특유의 효과가 있다.As described above, the present invention does not close the pressure plate formed on the cassette at the bottom of the molten steel ladle due to an artificial working mistake of the operator, and the molten steel is loaded on the trolley while the tapping worker starts the tapping work even in the refinery operation room. When the molten steel leaks out, the refining furnace can be automatically established by the molten steel outflow sensor so that the worker can relieve the burden on the tapping work, and only a small amount of molten steel is leaked during the initial tapping to recover quickly. In addition to preventing the loss of production opportunities, there is a unique effect that can prevent workers' industrial safety accidents.

Claims (1)

용강래들(150) 하단의 카세트(151)와 일치할 수 있도록 모터룸(210)내부 중앙하단에는 탑재된 감지장치(10)와, 상기 감지장치(10)의 외형을 이루는 프레임(16)과, 상기 프레임(16)을 고정하도록 상면 양측에 설치된 고정가이드(14)와, 상기 프레임(16)에 내장된 광 센서(17)와, 상기 광 센서(17)에서 발생되는 광(20)을 전방으로 유도하도록 프레임(16)의 전면에 형성된 글레스홀(18)과, 상기 광 센서(17)의 검출신호를 전송하는 케이블(13)과, 상기 케이블(13)을 보호하도록 프레임(17)의 측면에 설치된 배관(15)과, 상기 프레임(17)의 내부로 유입되는 이물질을 차단하도록 프레임(17)의 상면에 설치된 커버(11)를 포함함을 특징으로 하는 정련로 출강온도 측정장치.　In order to match the cassette 151 at the bottom of the molten steel ladle 150, the sensing device 10 mounted on the inner center lower portion of the motor room 210, and the frame 16 forming the outer shape of the sensing device 10 and Fixing guides 14 provided on both sides of the upper surface to fix the frame 16, the optical sensor 17 embedded in the frame 16, and the light 20 generated by the optical sensor 17 are forwarded. A glass hole 18 formed at the front of the frame 16 to guide the cable, a cable 13 for transmitting a detection signal of the optical sensor 17, and a side surface of the frame 17 to protect the cable 13. Refining furnace tap temperature measuring apparatus, characterized in that it comprises a pipe (15) installed in, and a cover (11) installed on the upper surface of the frame (17) to block foreign matter flowing into the frame (17).
KR1020060129675A 2006-12-18 2006-12-18 Steel tapping measuring apparatus of refining furnace KR100775499B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60228929A (en) 1984-04-27 1985-11-14 Nippon Steel Corp Converter condition observing apparatus
JPH01113168A (en) * 1987-10-23 1989-05-01 Sumitomo Metal Ind Ltd Method for deciding flow-out of slag
JPH05105928A (en) * 1991-05-20 1993-04-27 Naigai Mariaburu Kk Method for confirming magnesium reaction
JPH0671322A (en) * 1992-08-27 1994-03-15 Kawasaki Steel Corp Construction for hot slab carrier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60228929A (en) 1984-04-27 1985-11-14 Nippon Steel Corp Converter condition observing apparatus
JPH01113168A (en) * 1987-10-23 1989-05-01 Sumitomo Metal Ind Ltd Method for deciding flow-out of slag
JPH05105928A (en) * 1991-05-20 1993-04-27 Naigai Mariaburu Kk Method for confirming magnesium reaction
JPH0671322A (en) * 1992-08-27 1994-03-15 Kawasaki Steel Corp Construction for hot slab carrier

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