KR830000481B1 - Hot blast furnace pressure method - Google Patents

Hot blast furnace pressure method Download PDF

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Publication number
KR830000481B1
KR830000481B1 KR1019810002462A KR810002462A KR830000481B1 KR 830000481 B1 KR830000481 B1 KR 830000481B1 KR 1019810002462 A KR1019810002462 A KR 1019810002462A KR 810002462 A KR810002462 A KR 810002462A KR 830000481 B1 KR830000481 B1 KR 830000481B1
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South Korea
Prior art keywords
air
blast furnace
hot
hot blast
blow
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KR1019810002462A
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Korean (ko)
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박환생
이원복
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포항종합제철 주식회사
고준식
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Priority to KR1019810002462A priority Critical patent/KR830000481B1/en
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Publication of KR830000481B1 publication Critical patent/KR830000481B1/en

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/10—Other details, e.g. blast mains
    • C21B9/12—Hot-blast valves or slides for blast furnaces
    • 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
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
    • F27D2019/0009—Monitoring the pressure in an enclosure or kiln zone

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

내용 없음.No content.

Description

열풍로(熱風爐) 충압방법Hot blast furnace pressure method

제1도는 본 발명의 충압방법 설명도.1 is an explanatory diagram of a pressure method of the present invention.

제2도는 본 발명을 행하기 위한 회로도.2 is a circuit diagram for carrying out the present invention.

제3도는 본 발명의 타임스케줄.3 is a time schedule of the present invention.

제4도는 본 발명의 시간과 풍량 및 풍압관계도.4 is a relationship between time, air flow rate and wind pressure of the present invention.

본 발명은 고로에 가열공기를 공급하는 열풍로 조업에 있어서 열풍로 교체 송풍시 풍압강하를 감소시키기 위한 열풍로 충압방법에 관한 것이다.The present invention relates to a hot blast charging method for reducing the wind pressure drop during hot blast replacement blow in hot blast furnace operation for supplying heated air to the blast furnace.

일반적으로 열풍로는 복수기(3-4기)의 열풍로를 병설하여 연소-휴지-송풍-휴지-연소의 사이클(Cycle)로 열풍로를 교체하여 가며 고로에 가열공기를 공급하나 열풍로 교체시에 송풍중인 열풍로(爐)가 송풍말기에 차기 송풍지령(送風指令)을 발하여 연소중인 열풍로 축열상태에서 휴지로 들어가며 충풍지령(充風指令)에 의해 충풍변이 일정 스트로크(Stroke)까지 한번에 열리므로 송풍중인 열풍로로 유입되던 풍량이 충풍중인 열풍로로 피드백(Feed Back)되어 풍압강하가 일어나며 이로 인하여 고로내의 장입물층에 충격을 주어 슬립(Slip)발생과 통기성 악화등 로황부조(爐況不調)의 요인이 되며, 이를 방지하기 위하여 종래에는 고로용 송풍기에서 수동으로 예상 풍압강하 만큼 추정하여 풍량을 보상하여 왔으나 수동으로 날개각을 조정하므로 운전운에 따라 편차폭이 심하여 소기의 목적을 달성치 못하였다.In general, the hot stove is installed with the hot stove of the condenser (3-4 units) and replaces the hot stove with a cycle of combustion-pause-blowing-pause-combustion and supplies heating air to the blast furnace, but when replacing the hot stove. The hot blast furnace which is blowing in the air issues the next blow command at the end of the blow, and enters the toilet from the heat accumulating state of the hot blast furnace which is being burned. Therefore, the amount of air that flows into the hot stove in the air is fed back to the hot stove in the wind, and the wind pressure drop occurs, which causes impact on the charging layer in the blast furnace. In order to prevent this, conventionally, the blast furnace blower has been manually estimated by the expected wind pressure drop to compensate for the air volume, but the blade angle is manually adjusted so that it can be adjusted according to the driving luck. Severe width did not achieve the intended purpose, value.

본 발명은 이러한 문제점을 해결하기 위하여 충풍변 스트로크를 단계별로 열어 풍압강하를 감소시키는 것으로 첨부도면에 의해 설명하면 다음과 같다.The present invention is described by the accompanying drawings to reduce the wind pressure drop by opening the air blow stroke step by step in order to solve this problem.

제1도에서와 같이 고로(1)에 송풍이 진행중인 열풍로(13)가 송풍말기에 차기 송풍지령을 발하면 연소중인 축열상태의 열풍로(14)는 버어너팬(Burner fan)(3)을 정지시킴과 동시에 가스차단변(9)과 버어너 A변(7)을 닫고, 가스관내 잔류가스를 로내에 불어 넣는 질소파지변(11)을 동작시켜 버너 G변(8)을 차단 후 연도변(10)을 닫아 휴지상태로 들어가며 송풍기(2)에 증풍신호(增風信號)를 발함과 동시에 충풍변(6)을 단계별로 연다.As shown in FIG. 1, when the hot blast furnace 13 in which blasting is in progress is issued to the blast furnace 1, the next blow command is issued at the end of the blast, the heat blast furnace 14 in the regenerated state is burner fan (3). Stop the gas shutoff side (9) and burner A side (7) and operate the nitrogen gripping side (11) which blows residual gas in the gas pipe into the furnace to shut off the burner G side (8) Close the side (10) to enter a state of rest, and blows the blower (2) at the same time to open the air blower (6) step by step.

즉 제2도 회로도와 같이 충풍변이 스타트(1AO) 됨과 동시에 충풍완료 타이머(1TM)가 동작되며 1단계에서 충풍변(6) 동작 준비시간(DT)과 충풍변(6) 동작시간(2T)만큼 동작되어 충풍변 스트로크가 전체 스트로크의 약 55%가 열린 상태에서 송풍압과 충풍로 내압을 균압시간 (3T)동안 균압하고 2단계에서 충풍변 동작시간(2T)만큼 동작시켜 충풍변 전체 스트로크의 약 70%까지 열린 상태에서 균압시간(3T)동안 균압시킨다.In other words, as shown in the circuit diagram of FIG. 2, the air blow side starts 1AO and the air blow completion timer 1TM is operated. In the first stage, the air blow side 6 prepares for the operation time DT and the air blow side 6 operating time 2T. When the blower stroke is opened about 55% of the total stroke, the blower pressure and the blower internal pressure are equalized during the equalizing time (3T), and in step 2, the blower operating time (2T) is operated to approximate the overall stroke of the blower. Equalize for equalization time (3T) in the open state to 70%.

3단계에서 다시 충풍변 동작시간(2T)만큼 동작시켜 충풍변 전체 스트로크의 약 85%만큼 열린 상태에서 균압시간(3T)동안 균압시킨다(이때 충풍중인 열풍로 내압 1.2kg/cm2이 된다).In step 3, it is operated by the air blower operation time (2T) again, and the pressure is equalized during the pressure equalizing time (3T) while being opened by about 85% of the total stroke of the air blower (at this time, the internal pressure of the hot wind furnace being blown is 1.2 kg / cm 2 ).

4단계에서 충풍변 동작시간(2T)만큼 동작시켜 충풍변 스트로크가 완전 열린 상태에서 균압을 시키면 충풍중인 열풍로(14)와 송풍중인 열풍로(13)가 등압이 되어, 차압검출 릴레이(SEPL)와 충풍타이머(1TM)의 두 조건이 만족되었을때 풍량보상이 끝난다.In step 4, if the air pressure stroke is operated for 2T and the pressure is equalized while the air blow stroke is completely open, the hot air passage 14 and the hot air passage 13 in the blowing are equal pressure, and the differential pressure detection relay (SEPL) The airflow compensation ends when the two conditions, i.e.

이 때 풍량보상이 끝난 축열상태의 충풍중인 열풍로(14)는 송풍변(5)과 열풍변(4)이 열려 송풍에 들어가며, 기존 송풍중인 열풍로(3)는 휴지를 거쳐 연소모드(Mode)에 들어간다.At this time, the hot wind furnace 14 in the heat storage state in which the air volume compensation is completed is blown (5) and the hot air side (4) is opened and the air is blown, and the existing hot air furnace (3) is in the combustion mode through the toilet (Mode) Enter

설명되지 않은 12는 연도이며 15는 연소로이다.Unexplained 12 is the year and 15 is the furnace.

이상과 같은 구성과 작용으로 종래에 수동으로 풍량을 보상하여 풍압강하폭을 감소시키던 불편을 없애고 고로내의 장입물층에 충격을 감소시켜 로황안정에 기여하며 단계적 충풍으로 냉풍과 열풍의 혼합이 잘 되어 송풍초기와 말기의 열풍온도 편차를 줄여 열풍 지정온도 관리가 용이하며 용선생산량 증대에 효과가 큰 발명이다.By compensating the air volume manually by the above configuration and action, it eliminates the inconvenience of reducing the wind pressure drop width and reduces the impact on the charge layer in the blast furnace, contributing to the stability of the furnace sulfur, and by mixing the cold and hot air well with the stepwise wind blowing It is easy to manage hot air designation temperature by reducing the variation of hot air temperature at the beginning and end, and it is a great invention to increase the amount of charter production.

Claims (1)

휴지 상태에서 송풍을 하기 위하여 충풍변(6)을 열어 충분할 때 충풍변 스트로크를 단계별로 열어 열풍로 교체시 풍압강하를 감소시키는 것을 특징으로 하는 열풍로 충압방법.Hot air blast pressure charging method, characterized in that to reduce the wind pressure drop when replacing the hot air by opening the air blow side stroke step by step when enough to open the air blow side (6) in order to blow in the idle state.
KR1019810002462A 1981-07-07 1981-07-07 Hot blast furnace pressure method KR830000481B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114959147A (en) * 2022-06-02 2022-08-30 日照钢铁控股集团有限公司 Blast furnace hot blast stove pressure stabilizing furnace changing method, device and equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114959147A (en) * 2022-06-02 2022-08-30 日照钢铁控股集团有限公司 Blast furnace hot blast stove pressure stabilizing furnace changing method, device and equipment

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