KR100799424B1 - A simultaneous heat recovery and pre-reduction method of hot sinter - Google Patents

A simultaneous heat recovery and pre-reduction method of hot sinter Download PDF

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KR100799424B1
KR100799424B1 KR1020060130155A KR20060130155A KR100799424B1 KR 100799424 B1 KR100799424 B1 KR 100799424B1 KR 1020060130155 A KR1020060130155 A KR 1020060130155A KR 20060130155 A KR20060130155 A KR 20060130155A KR 100799424 B1 KR100799424 B1 KR 100799424B1
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South Korea
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sintered ore
red
reduction
gas
red sintered
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Korean (ko)
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조길원
박흥수
조한창
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재단법인 포항산업과학연구원
주식회사 포스코
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0073—Selection or treatment of the reducing gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A method for partially reducing red-hot sintered ore and recovering waste heat of red-hot sintered ore is provided to reduce the consumption of coke by injecting red-hot sintered ore in the form of partially reduced iron oxide into a blast furnace, and enhance the energy efficiency in an ironmaking process by recovering waste heat generated in a partial reduction process of the red-hot sintered ore and using the recovered waste heat in the other process. A method for partially reducing red-hot sintered ore and recovering waste heat of red-hot sintered ore comprises the steps of: (a) primarily crushing sintered ore to obtain red-hot sintered ore(22), injecting the red-hot sintered ore and reduction gas into a reduction furnace(30) to perform a reduction reaction; (b) injecting sintered ore(32) partially reduced by the injected reduction gas into a blast furnace; and (c) recovering waste heat of reduction gas heated by the red-hot sintered ore in a process of partially reducing the red-hot sintered ore. The step(c) comprises the steps of: (c1) injecting the reduction gas heated by the red-hot sintered ore in the process of partially reducing the red-hot sintered ore into the reduction furnace again through a high temperature gas circulation system(40); (c2) integrally attaching a waste heat vapor generator(41) to the high temperature gas circulation system to generate vapor from the waste heat vapor generator by temperature of gas passing through the high temperature gas circulation system, and driving an electric generator(42) using the generated vapor to produce electricity(E); and (c3) exhausting a portion of the reduction gas injected again into the reduction furnace through a gas exhaust system(45) such that the portion of the reduction gas is used as a heat source of the other process.

Description

적열소결광의 부분환원 및 배열회수 방법{A simultaneous heat recovery and pre-reduction method of hot sinter}A simultaneous heat recovery and pre-reduction method of hot sinter}

도 1은 일반적인 소결기의 소결과정 및 적열소결광의 생산공정을 나타낸 개략도1 is a schematic diagram showing a sintering process of a typical sintering machine and a production process of red sintered ore

도 2는 도 1에 의해 생산된 적열소결광을 고로에 투입하는 과정을 나타낸 흐름도FIG. 2 is a flowchart illustrating a process of injecting the red sintered light produced by FIG. 1 into a blast furnace;

도 3은 본 발명의 일실시예에 따른 적열소결광의 부분환원 및 배열회수 공정을 나타낸 개략도Figure 3 is a schematic diagram showing a partial reduction and heat recovery process of red sintered ore according to an embodiment of the present invention

도 4는 도 3에 의한 적열소결광의 부분환원 및 배열회수 과정을 나타낸 흐름도4 is a flowchart showing a partial reduction and sequence recovery process of the sintered red light according to FIG.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

100 : 소결기 10 : 장입기 11 : 소결대차100: sintering machine 10: charging machine 11: sintering cart

12 : 소결중의 원료 13 : 무한궤도 14 : 풍상12: raw material during sintering 13: caterpillar 14: wind

15 : 유인송풍기 16 : 공기흡입관 17 : 점화로15: manned blower 16: air suction pipe 17: ignition furnace

20 : 적열소결광케이크 21 : 파쇄기 22 : 적열소결광20: red sintered cake 21: crusher 22: red sintered light

23 : 냉각기 30 : 환원로 32 : 부분환원된 소결광23 cooler 30 reduction furnace 32 partially reduced sintered ore

40 : 고온순환가스계 41 : 배열증기발생기 42 : 발전기40 high temperature circulating gas system 41 array steam generator 42 generator

45 : 가스배출계 E : 전력45: gas discharge meter E: electric power

본 발명은 적열소결광의 부분환원 및 배열회수 방법에 관한 것으로서, 보다 상세하게는 적열소결광을 부분환원시키는 동시에 상기 적열소결광을 부분환원시키는 과정에서 적열소결광에 의해 온도가 상승한 환원가스를 배열회수함으로서, 고로에서의 환원제로 사용되는 코크스의 사용량을 감소시킬 뿐만 아니라 제선공정에서의 에너지 효율을 증가시킬 수 있도록 한 적열소결광의 부분환원 및 배열회수 방법에 관한 것이다.The present invention relates to a partial reduction and sequence recovery method of sintered red light, and more particularly, by partially recovering the red sintered light and simultaneously recovering the reducing gas whose temperature has risen by red sintered light in the process of partially reducing the red sintered light. The present invention relates to a partial reduction and heat recovery method of red sintered ore which not only reduces the amount of coke used as a reducing agent in blast furnaces but also increases energy efficiency in the steelmaking process.

일반적으로 제철소의 에너지 효율은 거의 한계에 도달한 것으로 평가되고 있는 바, 추가적인 에너지 절약을 위해서는 고로에서의 코크스 절감이 가능한 기술과 배열의 유효이용 기술이 필요한 것으로 평가되고 있다. 고로에서의 코크스 사용을 줄이는 방법으로는 고로에 코크스 대체재를 취입하는 것과 소결원료인 철광석, 석회석, 분코크스 등을 배합하여 소결시킨 후, 파쇄한 적열소결광을 공급하는 것이 유용한 것으로 알려져 있으며, 도 1 및 도 2를 통해 일반적인 소결기의 소결과정 및 적열소결광의 생산공정 및 상기 생산된 적열소결광을 고로에 투입하는 과정을 살펴보면 다음과 같다.In general, the energy efficiency of steel mills is estimated to have reached its limit, and further energy saving requires the technology to reduce the coke in the blast furnace and to utilize the technology of the arrangement. In order to reduce the use of coke in the blast furnace, it is known that blowing the coke substitute in the blast furnace, and sintered by sintering raw materials such as iron ore, limestone, powdered coke and the like, and supplying the crushed red sintered ore, Fig. 1 And through the sintering process of the general sintering machine and the production process of the red sintered ore and the process of putting the produced red sintered ore into the blast furnace through Figure 2 as follows.

먼저, 소결 원료인 철광석, 석회석, 분코크스 등이 적절히 배합되어 장입기(10)을 통하여 소결대차(11)에 장입되면, 소결대차(11)에 장입된 소결원료는 점 화로(17)에서 표면이 착화되는데, 소결대차(11)는 무한궤도(13)로 구성되어 연속적으로 상기 작업이 진행되게 된다. 소결대차(11)에 장입된 소결중의 원료(12)의 상부에 접촉된 외부 공기는 유인송풍기(15)의 흡인력에 의해 흡인되어 소결중의 원료(12)내의 코크스를 태우게 되며, 이 코크스의 연소열에 의해 분광석이 고온으로 소결되게 된다. 소결 후의 연소가스는 풍상(14)과 공기흡입관(16)을 통하여 유인송풍기(15)를 경유하여 연돌로 배출되고, 소결이 완료된 적열소결광 케이크(20)는 그 온도가 1200℃에 달하며, 파쇄기(21)에서 1차 파쇄된다. First, when iron ore, limestone, powdered coke, etc., which are sintering raw materials are properly blended and charged into the sintering bogie 11 through the charging machine 10, the sintering raw material charged into the sintering bogie 11 is surfaced in the ignition furnace 17. This is ignited, the sintered trolley 11 is composed of a crawler 13 is to be continuously performed the operation. The external air contacted to the upper portion of the raw material 12 during sintering charged into the sinter bogie 11 is sucked by the suction force of the draw fan 15 to burn coke in the raw material 12 during sintering. The heat of combustion causes the spectroscopy to be sintered at a high temperature. The combustion gas after sintering is discharged to the stack via the induction blower 15 through the wind phase 14 and the air suction pipe 16, and the sintered red sintered quench cake 20 reaches a temperature of 1200 ° C. Primary crush in 21).

상기 적열소결광 케이크(20)가 1차 파쇄된 적열소결광(22)은 냉각기(23)로 투입되는데 냉각기(23)에는 강제적으로 공기가 공급되어 상기 적열소결광(22)을 냉각시키게 되고, 냉각된 적열소결광(22)은 고로로 이송되어 고로의 원료로서 사용된다.The red sintered light 22 of which the red sintered light cake 20 is first broken is introduced into the cooler 23. The cooler 23 is forcibly supplied with air to cool the red sintered light 22, and the cooled red light is cooled. The sintered ore 22 is transferred to the blast furnace and used as a raw material of the blast furnace.

그러나 상기와 같이 생산된 종래의 적열소결광(22)은 Fe2O3의 화학식을 가지는 완전산화철의 형태로 공급되므로 고로에서 산화철 중 산소의 격리를 위해 사용되는 환원제인 코크스의 사용량이 증가하게 될 뿐만 아니라 적열소결광(22)이 가지고 있는 현열을 활용하지 못하게 되는 등의 문제점이 있었다.However, since the conventional red sintered ore 22 produced as described above is supplied in the form of a complete iron oxide having a chemical formula of Fe 2 O 3 , the amount of coke which is a reducing agent used for sequestering oxygen in iron oxide in the blast furnace is increased. But there was a problem such as not using the sensible heat that the red sintered ore 22 has.

본 발명은 상술한 문제점을 해결하기 위한 것으로서, 특히, 본 발명은 소결이 완료된 소결광을 1차 파쇄한 적열소결광에 환원가스를 공급하여 상기 적열소결광을 부분환원, 즉, FeO 또는 Fe3O4가 부분적으로 포함되도록 하는 동시에 상기 적 열소결광을 부분환원시키는 과정에서 적열소결광에 의해 온도가 상승한 환원가스를 배열회수시켜 타공정에 활용할 수 있도록 함으로서, 적열소결광을 완전산화철의 형태가 아닌 부분환원된 산화철의 형태로 고로에 투입하게 되어, 고로에서의 환원제로 사용되는 코크스의 사용량을 감소시킬 뿐만 아니라 상기 적열소결광의 부분환원공정에서 생성되는 열을 배열회수하여 타공정에 사용하게 되어, 제선공정에서의 에너지 효율을 증가시킬 수 있도록 하는 적열소결광의 부분환원 및 배열회수 방법을 제공함에 목적이 있다.The present invention is to solve the above problems, in particular, the present invention by supplying a reducing gas to the sintered red sintered ore first crushed sintered ore by partially reducing the red sintered ore, that is, FeO or Fe 3 O 4 In the process of partially reducing the red sintered ore, the reduced gas whose temperature has risen by the red sintered light can be recovered and used in other processes, so that the red sintered light is partially reduced in form of iron oxide. In addition to reducing the amount of coke used as a reducing agent in the blast furnace, as well as reducing the amount of coke used in the partial reduction process of the red sintered ore to recover the heat is used in other processes, It is intended to provide a partial reduction and heat recovery method of sintered red light that can increase energy efficiency. There is.

상술한 목적을 달성하기 위한 본 발명의 특징은, (a)소결이 완료된 소결광을 1차 파쇄한 적열소결광을 환원로에 투입한 후 환원가스를 주입하여 환원반응을 시키는 단계와; (b)상기 주입된 환원가스에 의해 부분환원된 소결광을 고로에 투입하는 단계와; (c)상기 적열소결광을 부분환원시키는 과정에서 적열소결광에 의해 온도가 상승한 환원가스를 배열회수하는 단계를 포함하는 적열소결광의 부분환원 및 배열회수 방법이다.Features of the present invention for achieving the above object, (a) the step of injecting a reducing gas after the sintered ore sintered red sintered primary crushed red sintered ore into the reduction furnace for the reduction reaction; (b) injecting the sintered ore partially reduced by the injected reducing gas into the blast furnace; (c) a partial reduction and heat recovery method of red sintered ore including the step of recovering the reducing gas whose temperature is increased by the red sintered light in the process of partially reducing the red sintered ore.

상기 본 발명의 특징에 의한 환원가스는, 일산화탄소와 수소를 포함하게 되는 실시예를 구성할 수 있다.The reducing gas according to the above features of the present invention can constitute an embodiment in which carbon monoxide and hydrogen are included.

또한, 상기 본 발명의 특징에 의한 (b)부분환원된 소결광은, FeO 또는 Fe3O4를 포함하게 되는 실시예를 구성할 수 있다.In addition, the (b) partially reduced sintered ore according to the above features of the present invention can constitute an embodiment that includes FeO or Fe 3 O 4 .

또한, 상기 본 발명의 특징에 의한 (c)적열소결광을 부분환원시킨 환원가스 를 배열회수하는 단계는, (c1)상기 적열소결광을 부분환원시키는 과정에서 적열소결광에 의해 온도가 상승한 환원가스를 고온가스순환계를 통해 환원로로 재투입시키는 단계를 포함하여 구성하는 실시예를 구성할 수 있다.In addition, (c) the step of recovering the reducing gas partially reduced red sintered ore according to the characteristics of the present invention, (c1) the high temperature of the reduced gas is increased by the red sintered light in the process of partially reducing the red sintered light An embodiment may be configured, including the step of re-injecting the gas into the reduction furnace through a gas circulation system.

또한, 상기 본 발명의 특징에 의한 (c)적열소결광을 부분환원시킨 환원가스를 배열회수하는 단계는, (c2)상기 고온가스순환계에 일체형으로배열증기발생기를 결착시켜, 상기 고온가스순환계를 통과하는 가스의 온도에 의해 상기 배열증기발생기로부터 증기를 발생시키고, 상기 발생 된 증기를 이용하여 발전기를 구동시킴으로서 전력을 생산하는 단계를 포함하여 구성하는 실시예를 구성할 수 있다.In addition, (c) the step of recovering the reduced gas partially reduced red sintered ore according to the characteristics of the present invention, (c2) by binding the array steam generator integrally to the hot gas circulation system, passing through the hot gas circulation system By generating a steam from the array steam generator by the temperature of the gas to be generated, by using the generated steam to drive the generator can be configured to comprise an embodiment comprising the step of producing power.

또한, 상기 본 발명의 특징에 의한 (c)적열소결광을 부분환원시킨 환원가스를 배열회수하는 단계는, (c3)상기 환원로로 재투입되는 환원가스 중 일부를, 타공정의 열원으로 사용 가능하도록 가스배출계를 통하여 배출시키는 단계를 포함하여 구성하는 실시예를 구성할 수 있다.In addition, the step (c) heat recovery of the reducing gas partially reduced red sintered ore according to the characteristics of the present invention, (c3) can be used as a heat source of another process, a part of the reducing gas re-introduced into the reduction furnace. An embodiment may be configured to include a step of discharging through the gas discharge system.

상기 본 발명의 목적과 특징 및 장점은 첨부도면 및 다음의 상세한 설명을 참조함으로서 더욱 쉽게 이해될 수 있을 것이다.The objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예의 구성 및 그 작용 효과에 대해 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and effect of the preferred embodiment of the present invention.

도 3은 본 발명의 일실시예에 따른 적열소결광의 부분환원 및 배열회수 공정을 나타낸 개략도이고, 도 4는 도 3에 의한 적열소결광의 부분환원 및 배열회수 과정을 나타낸 흐름도로서, 본 발명의 적열소결광의 부분환원 및 배열회수 방법을 살펴보면 다음과 같다.Figure 3 is a schematic diagram showing a partial reduction and heat recovery process of the red sintered ore according to an embodiment of the present invention, Figure 4 is a flow chart showing a partial reduction and heat recovery process of the red sintered light according to Figure 3, the red light of the present invention The partial reduction and heat recovery method of sintered ore are as follows.

먼저, 도 3 및 도 4에 도시된 바와 같이, (a)소결이 완료된 소결광을 1차 파쇄한 적열소결광(22)을 환원로(30)에 투입한 후 환원가스를 주입하여 환원반응을 시키게 되는데, First, as shown in Figures 3 and 4, (a) the sintered ore complete sintered ore crushed red sintered ore 22 is introduced into the reduction furnace 30 and the reduction gas is injected to reduce the reaction. ,

상기 환원로(30)는, 고정식, 이동식 혹은 유동상식 등 다양한 형태로 제작가능하며, 상기 투입되는 환원가스는 전로가스나 전로가스 중의 이산화탄소를 제거한 가스 혹은 천연가스를 개질한 가스 등을 사용할 수 있으며 공통적으로 일산화탄소와 수소를 주요 구성성분으로 한다.The reduction furnace 30 may be manufactured in various forms such as a fixed type, a mobile type, or a fluidized bed type. The reducing gas to be introduced may be a converter gas, a gas from which carbon dioxide is removed from the converter gas, or a gas reformed from natural gas. Commonly, carbon monoxide and hydrogen are the main constituents.

상기 환원로(30)에 투입되는 적열소결광(22)은 그 온도가 800℃ ~ 900℃에 달하며, 일반적으로 적열 소결광(22)의 환원가스에 대한 반응 200℃ 이상에서 Fe2O3가 Fe3O4로, 500℃ 이상에서 Fe3O4가 FeO로, 700℃ 이상에서 FeO가 Fe로 환원되고, 그로 인해 800℃ 이상의 상기 적열소결광(22)이 일산화탄소와 수소를 주성분으로 하는 환원가스와 반응토록 적절한 반응시간을 확보하여 반응시킴으로서, 적열소결광(22)의 부분환원, 즉, FeO 또는 Fe3O4가 포함된 소결광(32)이 생산 가능하게 되며, 상기 적열소결광(22)의 고온 현열을 반응에 이용하므로 환원반응율의 증대가 가능하게 된다. The red sintered ore 22 introduced into the reduction furnace 30 has a temperature of 800 ° C. to 900 ° C., and in general, Fe 2 O 3 is Fe 3 at a temperature of 200 ° C. or higher with respect to the reducing gas of the red sintered ore 22. With O 4 , Fe 3 O 4 is reduced to FeO at 500 ° C. or higher, and FeO is reduced to Fe at 700 ° C. or higher, whereby the red sintered ore 22 at 800 ° C. or higher reacts with a reducing gas mainly composed of carbon monoxide and hydrogen. By ensuring the appropriate reaction time for the reaction, the partial reduction of the sintered ore 22, that is, the sintered ore 32 containing FeO or Fe 3 O 4 can be produced, the high temperature sensible heat of the sintered ore 22 Since it is used for reaction, increase of a reduction reaction rate is attained.

상기와 같이, (a)소결이 완료된 소결광을 1차 파쇄한 적열소결광(22)을 환원로(30)에 투입한 후 환원가스를 주입하여 환원반응을 시키는 단계를 거친 후에,As described above, (a) after the sintered ore sintered sintered ore crushed red sintered ore 22 is introduced into the reduction furnace 30 and the reduction gas is injected to undergo a reduction reaction,

(b)상기 주입된 환원가스에 의해 부분환원된 소결광(32)을 고로에 투입하게 되는데, 상기 부분환원된 소결광(32)을 온간 혹은 추가적인 냉각을 거쳐 냉간으로 고로에 공급하게 되며, 부분환원된 소결광(32)의 투입으로 인해 고로에서의 환원제로 사용되는 코크스의 사용량을 감소시킬 수 있게 된다.(b) The partially reduced sintered ore 32 is injected into the blast furnace by the injected reducing gas. The partially reduced sintered ore 32 is supplied to the blast furnace by cold or through additional cooling, and partially reduced. Input of the sintered ore 32 can reduce the amount of coke used as a reducing agent in the blast furnace.

상기와 같이, (b)상기 주입된 환원가스에 의해 부분환원된 소결광(32)을 고로에 투입하는 단계를 거친 후에,As described above, (b) after the step of introducing the sintered ore 32 partially reduced by the injected reducing gas into the blast furnace,

(c)상기 적열소결광(22)을 부분환원시키는 과정에서 적열소결광(22)에 의해 온도가 700℃이상까지 상승하는 환원가스를 배열회수하여 재활용, 전력생산, 타공정에서의 이용 등으로 활용하게 된다.(c) during the partial reduction of the red sintered ore 22, the reduced gas whose temperature rises to 700 ° C. or higher by the red sintered ore 22 is recovered and used for recycling, power production, and other processes. do.

상기 재활용하는 방법으로. (c1)상기 고온의 환원가스를 고온가스순환계(40)를 통해 환원로(30)로 재투입시켜 재활용할 수 있으며,By the above recycling method. (c1) the high temperature reducing gas may be recycled to the reduction furnace 30 through the high temperature gas circulation system 40 and recycled,

상기 전력생산에 이용하는 방법으로. (c2)상기 고온가스순환계(40)에 일체형으로 배열증기발생기(41)를 결착시킨 후, 상기 고온가스순환계(40)를 통과하는 가스의 온도에 의해 발생 된 증기를 이용하여 발전기(42)를 구동시킴으로서 전력(E)을 생산하게 구성할 수 있는데, 상기 배열증기발생기(41)의 작동유체는 물 뿐만이 아니라 다양한 열매가 사용될 수 있으며, 이에 따라 발전기(42)도 다양한 작동 유체에 적절한 발전기(42)를 사용하는 것이 바람직하다.In the method used for the power production. (c2) After the array steam generator 41 is integrally bound to the hot gas circulation system 40, the generator 42 is operated using steam generated by the temperature of the gas passing through the hot gas circulation system 40. It can be configured to produce the power (E) by driving, the working fluid of the steam generator (41) can be used not only water but various fruits can be used, so that the generator 42 is also suitable for a variety of working fluid generator 42 Is preferably used.

또한, 배열증기발생기(41)에서 발생 되는 증기는 상기와 같이 발전에 이용될 수도 있으나, 증기 자체로도 이용될 수 있도록 공지된 증기공급계를 설치하여 구성하는 것도 가능하다.In addition, the steam generated from the array steam generator 41 may be used for power generation as described above, it is also possible to configure a known steam supply system to be used as the steam itself.

상기 환원가스를 배열회수하여 재활용, 전력생산에 이용하는 것 이외에 타공정에서의 활용하기 위하여, (c3)상기 환원로(30)로 재투입되는 환원가스 중 일부를 가스배출계(45)를 통하여 배출시켜 타공정의 열원으로 사용함으로서, 타공정에서 활용할 수 있게 구성된다.In addition to recycling the reducing gas for recycling and using it for power generation, (c3) part of the reducing gas re-introduced into the reduction furnace 30 is discharged through the gas discharge system 45 for use in other processes. By using it as a heat source of another process, it can be utilized in another process.

이외에도 본 발명인 적열소결광의 부분환원 및 배열회수 방법은 다양하게 변형실시될 수 있는 것으로, 본 발명의 목적범위를 일탈하지 않는 한, 변형되는 실시예들은 모두 본 발명의 권리범위에 포함되어 해석되어야 한다.In addition, the present invention can be variously modified and partially reduced recovery method of the red sintered ore, and the embodiments to be modified should be construed as being included in the scope of the present invention without departing from the scope of the present invention. .

이상의 본 발명에 의하면, 적열소결광을 완전산화철의 형태가 아닌 부분환원된 산화철의 형태로 고로에 투입함으로서, 고로에서의 환원제로 사용되는 코크스의 사용량을 감소시킬 뿐만 아니라 상기 적열소결광의 부분환원공정에서 생성되는 열을 배열회수하여 타공정에 사용함으로서, 제선공정에서의 에너지 효율을 증가시킬 수 있게 되는 등의 이점을 얻을 수 있게 된다.According to the present invention, by injecting the red sintered ore into the blast furnace in the form of partially reduced iron oxide, not in the form of complete iron oxide, not only reduces the amount of coke used as a reducing agent in the blast furnace, but also in the partial reduction process of the red sintered light By using the heat generated by heat recovery in another process, it is possible to obtain the advantage of being able to increase the energy efficiency in the iron making process.

Claims (6)

적열소결광의 부분환원 및 배열회수 방법에 있어서,In the partial reduction and heat recovery method of red sintered ore, (a)소결이 완료된 소결광을 1차 파쇄한 적열소결광(22)을 환원로(30)에 투입한 후 환원가스를 주입하여 환원반응을 시키는 단계와;(a) injecting a sintered ore sintered red sintered ore 22 into which the sintered ore is first crushed into the reduction furnace 30 and injecting a reducing gas to perform a reduction reaction; (b)상기 주입된 환원가스에 의해 부분환원된 소결광(32)을 고로에 투입하는 단계와;(b) injecting the sintered ore 32 partially reduced by the injected reducing gas into the blast furnace; (c)상기 적열소결광(22)을 부분환원시키는 과정에서 적열소결광(22)에 의해 온도가 상승한 환원가스를 배열회수하는 단계를 포함하는 것을 특징으로 하는 적열소결광의 부분환원 및 배열회수 방법.(c) a partial reduction and sequence recovery method of red sintered ore, characterized in that the step of recovering the reducing gas whose temperature rises by the red sintered ore (22) in the process of partial reduction of the red sintered ore (22). 제 1항에 있어서, 환원가스는,The method of claim 1, wherein the reducing gas, 일산화탄소와 수소를 포함하는 것을 특징으로 하는 적열소결광의 부분환원 및 배열회수 방법.Partial reduction and heat recovery method of red sintered ore, comprising carbon monoxide and hydrogen. 제 1항에 있어서, (b)부분환원된 소결광(32)은,The method of claim 1, wherein (b) the partially reduced sintered ore 32, FeO 또는 Fe3O4가 포함된 것을 특징으로 하는 적열소결광의 부분환원 및 배열회수 방법.Partial reduction and array recovery method of red sintered ore characterized in that it contains FeO or Fe 3 O 4 . 제 1항에 있어서,(c)적열소결광(22)을 부분환원시킨 환원가스를 배열회수하는 단계는,According to claim 1, (c) The step of recovering the reducing gas partially reduced red sintered ore 22, (c1)상기 적열소결광(22)을 부분환원시키는 과정에서 적열소결광(22)에 의해 온도가 상승한 환원가스를 고온가스순환계(40)를 통해 환원로(30)로 재투입시키는 단계를 포함하는 것을 특징으로 하는 적열 소결광의 부분환원 및 배열회수 방법.(c1) re-injecting the reducing gas whose temperature has risen by the red sintered light 22 into the reduction furnace 30 through the hot gas circulation system 40 in the process of partially reducing the red sintered light 22. Partial reduction and heat recovery method of red sintered ore characterized by the above-mentioned. 제 1항에 있어서,(c)적열소결광(22)을 부분환원시킨 환원가스를 배열회수하는 단계는,According to claim 1, (c) The step of recovering the reducing gas partially reduced red sintered ore 22, (c2)상기 고온가스순환계(40)에 일체형으로 배열증기발생기(41)를 결착시켜, 상기 고온가스순환계(40)를 통과하는 가스의 온도에 의해 상기 배열증기발생기(41)로부터 증기를 발생시키고, 상기 발생 된 증기를 이용하여 발전기(42)를 구동시킴으로서 전력(E)을 생산하는 단계를 포함하는 것을 특징으로 하는 적열 소결광의 부분환원 및 배열회수 방법.(c2) binding steam generator 41 integrally to the hot gas circulation system 40 to generate steam from the steam generator 41 by the temperature of the gas passing through the hot gas circulation system 40; , Partial reduction and heat recovery method of the red sintered ore characterized in that it comprises the step of producing a power (E) by driving the generator (42) using the generated steam. 제 1항에 있어서,(c)적열소결광(22)을 부분환원시킨 환원가스를 배열회수하는 단계는,According to claim 1, (c) The step of recovering the reducing gas partially reduced red sintered ore 22, (c3)상기 환원로(30)로 재투입되는 환원가스 중 일부를, 타공정의 열원으로 사용 가능하도록 가스배출계(45)를 통하여 배출시키는 단계를 포함하는 것을 특징으로 하는 적열 소결광의 부분환원 및 배열회수 방법.(c3) partial reduction of the red sintered ore characterized in that it comprises the step of discharging a part of the reducing gas re-introduced into the reduction furnace 30 through the gas discharge system 45 to be used as a heat source of other processes. And array recovery method.
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KR840001275B1 (en) * 1980-06-30 1984-09-01 스미또모 킨조꾸 코오교오 가부시기 가이샤 System for using waste heat for sintering plant

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