KR19990026276A - Reduction of Reduction Gas Amount in Reduction Furnace Using Core Gas in Korex Process - Google Patents
Reduction of Reduction Gas Amount in Reduction Furnace Using Core Gas in Korex Process Download PDFInfo
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- KR19990026276A KR19990026276A KR1019970048332A KR19970048332A KR19990026276A KR 19990026276 A KR19990026276 A KR 19990026276A KR 1019970048332 A KR1019970048332 A KR 1019970048332A KR 19970048332 A KR19970048332 A KR 19970048332A KR 19990026276 A KR19990026276 A KR 19990026276A
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Abstract
본 발명은 용철을 생산하는 코렉스공정에서 용융로에서 발생되는 환원가스의 보다 많은 량이 환원로에 취입되도록 하는 노정가스를 이용한 환원로 환원가스량 증대방법에 관한 것으로서,코렉스 공정에 있어 플랜트 압력제어를 위해 과잉 개스조절 벤튜리 스크러버를 통해 방출되는 환원가스(용융로 배가스)를 환원능력이 낮은 노정가스로 대체하여 환원로에 취입되는 환원가스의 량을 증대 시키고자 하는 데, 그 목적이 있다.The present invention relates to a method of increasing the reduction gas reduction gas using a top gas so that a larger amount of reducing gas generated in the melting furnace is blown into the reduction furnace in a Corex process for producing molten iron. The purpose of the present invention is to increase the amount of reducing gas blown into the reduction furnace by substituting the reducing gas (melting furnace flue gas) discharged through the gas regulating venturi scrubber with low-reduction stationary gas.
본 발명은 용융로에서 발생되는 배가스를 환원가스로 하여 광석을 환원시키고,환원된 광석을 용융로에서 용융하여 용철을 제조하는 코렉스 공정에있어서,In the present invention, in the Korex process for producing molten iron by reducing the ore by using the exhaust gas generated in the melting furnace as a reducing gas, and reducing the reduced ore in the melting furnace,
가스가 흐르는 방향을 기준으로 하여 상기 노정가스제어변을 지난위치의 노정가스배출라인과 과잉 개스조절 벤튜리 스크러버를 지나기 전의 플랜트 압력조절용 라인이 노정가스 공급라인을 통해 가스소통관계가 되도록 하고;The plant pressure regulating line before passing through the top gas control valve past the top gas discharge line and the excess gas regulating venturi scrubber on the basis of the direction in which the gas flows is in a gas communication relationship through the top gas supply line;
상기 노정가스 공급라인에는 노정가스 콤프레샤, 역지변및 순환가스량 제어변을 구비시키고;The stationary gas supply line includes a stationary gas compressor, a reverse side valve and a circulating gas amount control valve;
플랜트의 실제압력이 목표치 보다 낮아지게 되면, 상기 순환가스량 제어변의 개도를 작게하여 노정가스가 역지변을 통해 과잉 개스조절 벤튜리 스크러버로 흐르게 하여 플랜트의 실제압력이 목표치와 동일하게 되도록 하고;If the actual pressure of the plant is lower than the target value, the opening degree of the circulating gas amount control valve is reduced so that the top gas flows through the reverse valve to the excess gas regulating venturi scrubber such that the actual pressure of the plant is equal to the target value;
플랜트의 실제압력이 목표치 보다 크면 순환가스량 제어변를 크게하여 콤프레샤, 및 역지변을 통해 흐르는 노정가스의 량을 적게하여 플랜트의 실제압력이 목표치와 동일하게 되도록 하여 플랜트 압력조절을 위한 용융로 배가스를 환원로 배가스로 전부 또는 일부 대체하여 환원로에 취입되는 용융로배가스의 량을 증대시키는 코렉스 공정에서 노정가스를 이용한 환원로 환원가스량 증대방법을 그 요지로 한다.If the actual pressure of the plant is larger than the target value, the circulating gas volume control valve is enlarged to reduce the amount of compressed gas flowing through the compressor and reverse valve, so that the actual pressure of the plant is the same as the target value. The main purpose of the method is to increase the amount of reducing gas in the reduction furnace using the top gas in the Korex process in which all or part of the exhaust gas is used to increase the amount of molten furnace exhaust gas blown into the reduction furnace.
Description
본 발명은 용철을 생산하는 코렉스공정에서 용융로에서 발생되는 환원가스의 보다 많은 량이 환원로에 취입되도록 하는 노정가스를 이용한 환원로 환원가스량 증대방법에 관한 것이다.The present invention relates to a reduction furnace reduction gas amount increasing method using a top gas so that a larger amount of reducing gas generated in a melting furnace is blown into a reduction furnace in a Korex process for producing molten iron.
코렉스공정은 환원로에 철광석또는 펠레트와 석회석,백운석,규석등 부원료를 장입하고,용융로에 장입된 석탄을 용융로 하부로 취입된 산소에 의해 연소시켜 연소과정에서 발생되는 일산화탄소 및 수소가 주성분인 환원가스를 환원로에 취입하여 장입물 사이를 통과시켜 직접환원철을 제조한 다음,이 직접환원철을 스크류콘베어로 용융로에 장입하여 석탄연소과정에서 발생되는 열에 의해 용철을 제조하는 공정이다.In the Corex process, iron ore or pellets, limestone, dolomite, and quartzite are charged into the reduction furnace, and the coal charged into the furnace is burned by the oxygen blown into the lower part of the furnace, and carbon monoxide and hydrogen generated in the combustion process are reduced. The gas is blown into a reduction furnace and passed between the charges to produce direct reduced iron, and then the direct reduced iron is charged into a melting furnace with a screw conveyor to produce molten iron by the heat generated during the coal combustion process.
도1에나타난 바와같이,코렉스공정에있어서 용융로(1)에서 발생된 환원가스는 4개의 고온사이클론(hot cyclone) (3)에서 건식 제진되어 발생가스의 60~70%의 가스량은 환원로(2)에 취입되고 30~40%의 가스량은 냉각 개스 프리스크러버( cooling gas prescrubber)(4)를 거치면서 습식제진및 온도가 낮아진다.As shown in Fig. 1, in the Korex process, the reducing gas generated in the melting furnace 1 is dry-damped in four hot cyclones 3, so that 60 to 70% of the generated gas is reduced in the reducing furnace (2). ), 30-40% of the gas volume passes through a cooling gas prescrubber (4), resulting in lower damping and lower temperature.
이 가스의 절반정도는 다시 냉각개스조절 벤튜리 스크러버(cooling gas adjustable venturi scrubber)(5)를 거쳐 냉각개스 콤프레샤(cooling gas compressor)(6)에서 승압되어 고온 사이클론(3)전단에 취입하여 용융로(1)에서발생된 1050℃정도의 환원가스를 800℃정도로 조절하는데 사용된다.About half of this gas is again pressurized through a cooling gas adjustable venturi scrubber (5) in a cooling gas compressor (6) and blown into the front of the hot cyclone (3) to bring the melting furnace ( It is used to control reducing gas of about 1050 ℃ generated in 1) to about 800 ℃.
한편, 냉각개스 프리스크러버(4)를 거친 절반정도의 가스(약 20000~40000 Nm3/hr)는 과잉개스조절 벤튜리 스크러버(excess gas adjustable venturi scrubber)(7)를 거치면서 플랜트(plant)압력 제어용으로 사용되고 노정가스(환원로 배가스)와 합쳐져 가스홀다(12)로보내지거나 방산탑(11)에서 연소된다.On the other hand, about half of the gas (about 20000 to 40000 Nm 3 / hr) that has passed through the cooling gas prescrubber (4) passes through an excess gas adjustable venturi scrubber (7) and the plant pressure. It is used for control and is combined with the top gas (reduction furnace flue gas) and sent to the gas holder 12 or combusted in the dissipation tower 11.
상기 환원로(2)에 취입되는 환원가스량은 노정가스제어변(14)에 의해 조정된다.The amount of reducing gas blown into the reduction furnace 2 is adjusted by the stationary gas control valve 14.
즉,환원로(2)의 환원가스량을 증가시키려면 노정가스 유량계(13)의 목표치(SV)를 증가시켜 세트(set)시키면 실제값(PV)과 비교하여 실제값이 목표치보다 작으면 노정가스제어변(14)에 오픈(open)출력신호를 전송하여 목표치와 실제값이 같게되도록 제어된다.That is, in order to increase the amount of reducing gas in the reduction reactor 2, if the set value SV of the gas flow meter 13 is increased and set, the set gas is compared with the actual value PV, and if the actual value is smaller than the target value, By transmitting an open output signal to the control valve 14, the target value is controlled to be equal to the actual value.
이때의 환원가스의 흐름은 용융로(1),고온 사이클론(3),환원로(2),노정가스 프리스크러버(top gas prescrubber)(8), 노정가스 조절 벤츄리 스크러버(top gas adustable venturi scrubber)(9),노정가스 유량계(13),및노정가스 제어변(14)를 차례로 거쳐 과잉 개스조절 벤튜리 스크러버(7)를 거친 용융로 배가스와 합쳐져 가스홀더(12)로 보내지거나 방산탑(11)에서 연소된다.At this time, the flow of the reducing gas is a melting furnace (1), a high temperature cyclone (3), a reduction furnace (2), a top gas prescrubber (8), and a top gas adustable venturi scrubber (top gas adustable venturi scrubber) ( 9), the gas flow meter (13), and the gas flow control valve (14), in turn through the excess gas control venturi scrubber (7) combined with the exhaust gas from the furnace to be sent to the gas holder (12) or in the tower (11) Is burned.
한편, 플랜트압력제어는 플랜트압력발신기(15)의 목표치와 실제값(현재값)을 비교하여 현재값이 낮으면 과잉 가스조절 벤츄리 스크러버(7)에 크로즈(cldse)출력신호를 전송하여 목표치와 실제값이 같게되도록 제어된다.On the other hand, the plant pressure control compares the target value and actual value (present value) of the plant pressure transmitter 15, and if the present value is low, transmits a close output signal to the excess gas regulating venturi scrubber 7 to achieve the target value and actual value. The value is controlled to be equal.
이러한 제어는, 도2에 나타난 바와 같이,DCS(Digital Control System)(15a)내의 PID 제어모듈(Module)에 의하여 출력치가 계산되고 이 출력신호를 과잉 가스조절 벤튜리 스크러버(7)에 전송하여 큰 콘(Large Cone)(7a)와 작은 콘(Small Cone)(7b)을 제어하므로서 실제 플랜트 압력과 목표압력이 동일하게 되도록 이루어 진다.This control, as shown in Figure 2, the output value is calculated by the PID control module (Module) in the digital control system (DCS) (15a) and transmits this output signal to the excess gas control venturi scrubber (7) By controlling the large cone 7a and the small cone 7b, the actual plant pressure and the target pressure are made equal.
상기와 같은 과정을 통하여 환원로에 취입되는 환원가스량이 조정되고 있으나 프랜트 압력을 3.0∼3.5kg/㎠으로 유지하기 위하여는 과잉 개스조절 벤튜리 스크러버(7)를 통과하여 방출되는 환원가스량이 20000∼40000N㎥/hr가 되어야 제어가 가능하도록 되어있다.Although the amount of reducing gas blown into the reduction furnace is adjusted through the above process, in order to maintain the plant pressure at 3.0 to 3.5 kg / cm 2, the amount of reducing gas discharged through the excess gas control venturi scrubber 7 is 20000 to It is controlled to be 40000N㎥ / hr.
즉, 과잉 개스조절스크러버(7)는 2개의 콘의 작동으로 방출가스량을 조정하여 플랜트압력을 제어하도록 되어있으나 안전을 위하여 콘이 100%밀폐되지 않도록 설계되어 있고 또한 환원가스량을 한도 이상으로 늘리면 플랜트압력을 제어 할 수있기 때문에 20000∼40000N㎥/hr의 환원가스는 전혀 이용되지 못하고 방출된다.That is, the excess gas regulating scrubber (7) is to control the plant pressure by adjusting the amount of gas discharged by the operation of the two cones, but for the sake of safety, the cone is designed not to be 100% sealed and if the amount of reducing gas is increased above the limit, Since the pressure can be controlled, a reducing gas of 20000 to 40000 Nm3 / hr is not used at all and is released.
다시말하면, 종래의 코렉스 공정에서는 환원로의 환원가스로 사용될 수 있는 용융로 배가스(환원가스)의 일정량이 플랜트 압력제어를 위해 방출되어야 하는 문제점이 있다.In other words, in the conventional Korex process, there is a problem that a certain amount of the furnace flue gas (reduced gas) that can be used as the reducing gas of the reducing furnace has to be released for the plant pressure control.
본 발명은 코렉스 공정에 있어 플랜트 압력제어를 위해 과잉 개스조절 벤튜리스크러버를 통해 방출되는 환원가스(용융로 배가스)를 환원능력이 낮은 노정가스로 대체하여 환원로에 취입되는 환원가스의 량을 증대 시키고자 하는 데, 그 목적이 있다.The present invention increases the amount of reducing gas blown into the reduction furnace by replacing the reducing gas (melting furnace exhaust gas) discharged through the excess gas regulating venturi scrubber for the plant pressure control in the Corex process with the low gas of the reducing capacity. There is a purpose.
도 1은 종래의 코렉스 공정에 있어서 가스계통도1 is a gas system diagram in a conventional Korex process.
도 2는 종래의 플랜트 압력 제어도2 is a conventional plant pressure control diagram
도 3은 본 발명에 부합되는 코렉스 공정에 있어서 가스계통도Figure 3 is a gas system in the Corex process according to the present invention
도 4는 도3의 A부분의 상세도4 is a detailed view of portion A of FIG.
도 5는 본 발명에 부합되는 플랜트 압력제어 방식의 일례도Figure 5 is an example of a plant pressure control method in accordance with the present invention
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1...용융로, 2...환원로,1 ... melting furnace, 2 ... reducing furnace,
7...과잉 개스조절 벤튜리 스크러버,7. Excess gas regulating venturi scrubber,
70...플랜트 압력 조절용 라인,70 ... line for adjusting plant pressure,
100...노정가스공급라인, 101...노정가스 콤프레샤,100 ... gas supply line, 101 gas compressor,
102...역지변, 103...가스순환라인,102 station reverse, 103 gas circulation line,
103a...순환가스량제어변, 104...토출압력 발생기103a ... circulating gas flow control valve, 104 ... discharge pressure generator
본 발명은 환원광석을 용융시키는 용융로, 및 광석을 환원시키는 환원로를 포함하여 용융로에서 발생되는 배가스를 환원가스로 하여 광석을 환원시키고,환원된 광석을 용융로에서 용융하여 용철을 제조하고, 환원로의 배가스는 노정가스제어변을 구비하고 있는 노정가스배출라인을 통해 외부로 배출되고 상기 용융로 배가스의 대부분은 환원로에 환원가스로 취입되고, 나머지 배가스중 일부는 환원가스 온도제어용으로 순환되며, 나머지는 플랜트 압력조절용라인에 구비되어 있는 과잉 개스조절벤튜리 스크러버를 통해 배출되도록 구성되는 코렉스 공정에있어서,The present invention reduces the ore by using a flue gas generated in the melting furnace as a reducing gas, including a melting furnace for melting the reducing ore, and a reducing furnace for reducing the ore, and melting the reduced ore in the melting furnace to produce molten iron, the reduction furnace The exhaust gas of is discharged to the outside through the open gas discharge line having a top gas control valve, the majority of the furnace exhaust gas is blown into the reducing furnace as reducing gas, some of the remaining exhaust gas is circulated for reducing gas temperature control, the rest In the Korex process is configured to discharge through the excess gas control venturi scrubber provided in the plant pressure control line,
가스가 흐르는 방향을 기준으로 하여 상기 노정가스제어변을 지난위치의 노정가스배출라인과 과잉 개스조절 벤튜리 스크러버를 지나기 전의 플랜트 압력조절용 라인이 노정가스 공급라인을 통해 가스소통관계가 되도록 하고;The plant pressure regulating line before passing through the top gas control valve past the top gas discharge line and the excess gas regulating venturi scrubber on the basis of the direction in which the gas flows is in a gas communication relationship through the top gas supply line;
상기 노정가스 공급라인에는 노정가스 콤프레샤, 역지변및 순환가스량 제어변을 구비시키고;The stationary gas supply line includes a stationary gas compressor, a reverse side valve and a circulating gas amount control valve;
플랜트의 실제압력이 목표치 보다 낮아지게 되면, 상기 순환가스량 제어변의 개도를 작게하여 노정가스가 역지변을 통해 과잉 개스조절 벤튜리 스크러버로 흐르게 하여 플랜트의 실제압력이 목표치와 동일하게 되도록 하고;If the actual pressure of the plant is lower than the target value, the opening degree of the circulating gas amount control valve is reduced so that the top gas flows through the reverse valve to the excess gas regulating venturi scrubber such that the actual pressure of the plant is equal to the target value;
플랜트의 실제압력이 목표치 보다 크면 순환가스량 제어변의 개도를 크게하여 콤프레샤, 및 역지변을 통해 흐르는 노정가스의 량을 적게하여 플랜트의 실제압력이 목표치와 동일하게 되도록 하여 플랜트 압력조절을 위한 용융로 배가스를 환원로 배가스로 전부 또는 일부 대체하여 환원로에 취입되는 용융로배가스의 량을 증대시키는 코렉스 공정에서 노정가스를 이용한 환원로 환원가스량 증대방법에 관한 것이다.If the actual pressure of the plant is larger than the target value, the opening of the circulating gas flow control valve is increased to reduce the amount of compressed gas flowing through the compressor and the reverse valve so that the actual pressure of the plant is the same as the target value. The present invention relates to a method for increasing the reduction gas reduction gas using a top gas in a Korex process for increasing the amount of the melting furnace exhaust gas blown into the reduction furnace by replacing all or part of the reduction furnace exhaust gas.
이하, 본발명을 도면을 통해 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the drawings.
도3에 나타난 바와 같이, 코렉스 공정은 용융로(1)에서 발생된 배가스를 환원가스로 하여 환원로(2)에서 광석을 환원시키고, 환원된 광석을 용융로(1)에서 용융하여 용철을 제조하는 공정이다.As shown in Figure 3, the Corex process is a process for producing ore by reducing the ore in the reducing furnace (2) by using the exhaust gas generated in the melting furnace (1) as a reducing gas, and melting the reduced ore in the melting furnace (1) to be.
코렉스공정에 있어,환원로의 배가스는 노정가스 제어변(14)을 구비하고 있는 노정가스배출라인(20)을 통해 외부로 배출되고 상기 용융로 배가스의 대부분은 환원로(2)에 환원가스로 취입되고, 나머지 배가스중 일부는 환원가스 온도제어용으로 순환되며, 나머지는 플랜트 압력을 조절하기 위하여 플랜트 압력조절용 라인(70)에 구비되어 있는 과잉 개스 조절 벤튜리 스크러버(7)를 거쳐 배출 된다.In the Corex process, the exhaust gas of the reduction furnace is discharged to the outside through the furnace gas discharge line 20 having the stationary gas control valve 14, and most of the furnace exhaust gas is blown into the reduction furnace 2 as reducing gas. And, some of the remaining exhaust gas is circulated for reducing gas temperature control, the remainder is discharged through the excess gas control venturi scrubber (7) provided in the plant pressure control line 70 to adjust the plant pressure.
본 발명에 있어서는 가스가 흐르는 방향을 기준으로 하여 상기 노정가스제어변(14)를 지난 위치의 노정가스배출라인(20)과 과잉 개스조절 벤튜리 스크러버(7)를 지나기 전의 플랜트 압력조절용 라인(70)이 노정가스공급라인(100) 을 통해 가스소통관계가되도록 한다.In the present invention, the plant pressure regulating line 70 before passing through the stationary gas discharge line 20 and the excess gas regulating venturi scrubber 7 at the position past the stationary gas control valve 14 based on the direction in which the gas flows. ) Is a gas communication relationship through the gas supply line (100).
상기 노정가스공급라인(100)에는, 도4에 나타난 바와 같이, 노정가스 콤프레샤(101),및 역지변(102)을 구비시키고,순환가스량제어변(103a)을 구비시킨 가스순환라인(103)의 양단이 각각 상기 노정가스 콤프레샤(101)의 상,하부의 노정가스공급라인(100)에 가스소통관계로 연결 되도록 하여 플랜트의 실제압력이 목표치 보다 낮아지게 되면,상기 순환가스제어변(103a)의 개도를 작게하여 노정가스가 역지변(102)을 통해 과잉개스조절 벤튜리 스크러버(7)로 흐르게 하여 플랜트의 실제압력이 목표치와 동일하게 되도록 한다.As shown in FIG. 4, the gas gas supply line 100 includes a gas gas compressor 101, and a reverse valve 102, and a gas circulation line 103 provided with a circulating gas amount control valve 103a. If both ends of the top gas compressor of the top and bottom of the gas supply line 100 to the gas communication relationship to each other so that the actual pressure of the plant lower than the target value, the circulating gas control valve 103a The opening degree of the gas is reduced so that the top gas flows into the excess gas regulating venturi scrubber 7 through the reverse valve 102 so that the actual pressure of the plant is equal to the target value.
한편, 플랜트의 실제압력이 목표치 보다 크면, 상기 순환가스제어변(103a)의 개도를 크게하여 노정가스 콤프레샤(101)및 역지변(102)을 통해 흐르는 노정가스의 량을 적게하여 플랜트의 실제압력이 목표치와 동일하게 되도록 한다.On the other hand, if the actual pressure of the plant is greater than the target value, the opening degree of the circulating gas control valve 103a is increased to reduce the amount of the open gas flowing through the gas compressor 101 and the reverse valve 102 to reduce the actual pressure of the plant. Make it equal to this target value.
본 발명에 있어, 바람직하게는, 상기 노정가스 콤프레샤(101)의 하부의 노정가스공급라인(100)과 가스순환라인(103)이 만나는 지점과 상기 역지변(102)사이의 노정가스공급라인(100)에 토출압력 발신기(104)를 구비시키고, 토출압력 발신기(104)의 압력목표치를 플랜트 압력의 목표치와 동일하거나 또는 그 보다 낮게 세팅하여 토출압력 발신기의 실제압력과 목표치를 비교하여 실제압력이 목표압력 보다 작으면,순환가스 제어변(103a)의 개도를 작게하고, 실제압력이 목표압력 보다 크면, 순환가스제어변(103a)의 개도를 크게하여 플랜트의 실제압력이 목표치와 동일하게 되도록 하는 것이다.In the present invention, preferably, the stationary gas supply line between the stationary gas supply line 100 and the gas circulation line 103 at the lower portion of the stationary gas compressor 101 and the stationary valve 102 ( The discharge pressure transmitter 104 is provided at 100, and the pressure target value of the discharge pressure transmitter 104 is set equal to or lower than the target value of the plant pressure to compare the actual pressure with the target value of the discharge pressure transmitter and the actual pressure is increased. If the target pressure is smaller than the target pressure, the opening degree of the circulating gas control valve 103a is made smaller. If the actual pressure is larger than the target pressure, the opening degree of the circulating gas control valve 103a is increased to make the actual pressure of the plant equal to the target value. will be.
이 경우에 있어 제어는 ,도5에 나타난 바와같이,토출압력 발신기(104)에서의 실제압력을 전기적신호로 바꾸어 DSC(104a)내의PID제어 모듈로 보내고 여기서 실제압력과 목표치가 비교되어 출력치가 계산되고 이 계산된 출력치에 상응하는 신호를 순환가스제어변(103a)으로 보내어 순환가스제어변(103a)의 개도를 제어하는 방식이 채택될 수 있다.In this case, the control converts the actual pressure in the discharge pressure transmitter 104 into an electrical signal and sends it to the PID control module in the DSC 104a, as shown in FIG. 5, where the actual pressure and the target value are compared to calculate the output value. And a signal corresponding to the calculated output value is sent to the circulating gas control valve 103a to control the opening degree of the circulating gas control valve 103a.
본 발명에 있어서는 용융로 배가스가 환원로의 환원가스로 전량 이용되어야 하는경우및 용융로 배가스가 환원로의 환원가스로 사용되고 남은량이 플랜트 압력조절에 필요한 양 보다는 적은 경우에 상기 순환가스제어변(103a)의 개도가 제어되어 플랜트 압력이 조절된다.In the present invention, when the smelter exhaust gas is to be used as the reducing gas of the reduction furnace and the smelter exhaust gas is used as the reducing gas of the reducing furnace and the remaining amount is less than the amount necessary for the plant pressure control of the circulating gas control valve 103a The opening degree is controlled to regulate the plant pressure.
한편, 용융로 배가스가 환원로의 환원가스로 사용되고 남은 량이 플랜트 압력조절에 필요한 양 보다 많은 경우에는 종래의 코렉스 공정에서와 같이 과잉 개스조절벤튜리 스크러버(7)의 콘에 의해 제어된다.On the other hand, when the furnace exhaust gas is used as the reducing gas of the reduction furnace and the remaining amount is larger than the amount required for the plant pressure regulation, it is controlled by the cone of the excess gas control venturi scrubber 7 as in the conventional Korex process.
도3에서는 도1에 표시된 동일한 부재에 대해서는 동일한 부호를 표시하였으며,동일한 부호가 표시된 동일한 부재는 동일한 기능을 갖는다.In FIG. 3, the same reference numerals are shown for the same members shown in FIG. 1, and the same members with the same reference numerals have the same function.
상술한 바와 같이, 본 발명은 코렉스 공정의 환원로에 더 많은 환원가스를 취입할수 있게 하므로서 환원로내의 광석 또는 펠레트의 금속화율(광석및 펠레트 중의 Fe2O3,Fe3O4의 산화철이 Fe 상태로 환원된 비율)을 종래의 80∼85%수준에서 90∼95%수준으로 상승시킬수 있는 효과가 있는 것이다.As described above, the present invention allows more reducing gas to be blown into the reduction furnace of the Korex process, thereby reducing the metallization rate of the ore or pellets in the reduction furnace (Fe 2 O 3 , Fe 3 O 4 in ores and pellets). The ratio reduced to the Fe state) is effective to increase from the conventional 80 to 85% level to 90 to 95% level.
또한, 본 발명은 금속화율이 높아진 직접환원철을 용융로에 장입하여 용철을 제조하므로, 직접환원철중에 미환원된 Fe2O3, Fe3O4가 최소화되어 미환원철을 직접 환원시켜 용철을 제조하는 과정에서 흡열반응에 의해 손실되는 열을 줄일수 있게 되므로 용철1톤을 제조하는데 소요되는 산소와 석탄을 줄일 수 있는 효과가 있는 것이다.In addition, the present invention is to manufacture the molten iron by charging the direct reduction iron with a high metallization rate into the melting furnace, the process for producing molten iron by directly reducing the unreduced iron by minimizing the unreduced Fe 2 O 3 , Fe 3 O 4 in the direct reduction iron Since it is possible to reduce the heat lost by the endothermic reaction at will have the effect of reducing the oxygen and coal required to produce a ton of molten iron.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970048332A KR19990026276A (en) | 1997-09-23 | 1997-09-23 | Reduction of Reduction Gas Amount in Reduction Furnace Using Core Gas in Korex Process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970048332A KR19990026276A (en) | 1997-09-23 | 1997-09-23 | Reduction of Reduction Gas Amount in Reduction Furnace Using Core Gas in Korex Process |
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| KR19990026276A true KR19990026276A (en) | 1999-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019970048332A Withdrawn KR19990026276A (en) | 1997-09-23 | 1997-09-23 | Reduction of Reduction Gas Amount in Reduction Furnace Using Core Gas in Korex Process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100815701B1 (en) * | 2006-12-07 | 2008-03-20 | 주식회사 포스코 | Melting Furnace Pressure Drop Prediction Method and Melting Furnace Pressure Control Method in Molten Iron Manufacturing Process |
| KR20110038681A (en) * | 2008-06-27 | 2011-04-14 | 지멘스 브이에이아이 메탈스 테크놀로지스 게엠베하 | Process gas scrubber for melt reduction system for pig iron extraction |
-
1997
- 1997-09-23 KR KR1019970048332A patent/KR19990026276A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100815701B1 (en) * | 2006-12-07 | 2008-03-20 | 주식회사 포스코 | Melting Furnace Pressure Drop Prediction Method and Melting Furnace Pressure Control Method in Molten Iron Manufacturing Process |
| KR20110038681A (en) * | 2008-06-27 | 2011-04-14 | 지멘스 브이에이아이 메탈스 테크놀로지스 게엠베하 | Process gas scrubber for melt reduction system for pig iron extraction |
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