KR100588529B1 - Operation method of melter-gasifier - Google Patents
Operation method of melter-gasifier Download PDFInfo
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- KR100588529B1 KR100588529B1 KR1020010084430A KR20010084430A KR100588529B1 KR 100588529 B1 KR100588529 B1 KR 100588529B1 KR 1020010084430 A KR1020010084430 A KR 1020010084430A KR 20010084430 A KR20010084430 A KR 20010084430A KR 100588529 B1 KR100588529 B1 KR 100588529B1
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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
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
- C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
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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
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
- C21B13/143—Injection of partially reduced ore into a molten bath
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- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
본 발명은 신제선공정의 용융로에 관한 것으로서, 더욱 상세하게는 환원철이 석탄과 함께 장입되어 선철을 생산하는 용융로에 있어서 상부 석탄장입구측에 분산판을 설치하여 장입되는 장입물 분포를 제어하는 방법에 관한 것이다.The present invention relates to a melting furnace of a new steelmaking process, and more particularly, in a melting furnace in which reduced iron is charged together with coal to produce pig iron, a method of controlling the distribution of charged materials by installing a dispersion plate on an upper coal inlet side. It is about.
용융로, 환원로, 신제선법, 코렉스, 제선, 제철Melting Furnace, Reduction Furnace, New Iron Making Method, Corex, Steel Making, Steel Making
Description
도 1은 신제선 공정을 설명하는 도면.BRIEF DESCRIPTION OF THE DRAWINGS The figure explaining a new wire forming process.
도 2는 종래 용융로에서의 장입물 상부 분포 특성을 보여주는 도면.Figure 2 is a view showing the top distribution characteristics of the charge in the conventional melting furnace.
도 3은 슬래그 조성 및 염기도를 설명하는 상태도.3 is a state diagram illustrating slag composition and basicity.
도 4는 본 발명에 따른 장입물 분포 제어를 위한 분산판을 보여주는 도면.4 is a view showing a dispersion plate for the charge distribution control according to the present invention.
도 5는 본 발명에 따른 분산판 설치후 장입물 상부 분포 특성을 보여주는 도면.5 is a view showing the top distribution characteristics of the charge after installing the dispersion plate according to the present invention.
본 발명은 신제선공정의 용융로(melter-gasifier)에 관한 것으로서, 더욱 상세하게는 환원철이 석탄과 함께 장입되어 선철을 생산하는 용융로에 있어서 상부 석탄장입구측에 분산판을 설치하여 장입되는 장입물 분포를 제어하는 방법에 관한 것이다.The present invention relates to a melter (gasifier) of the new steelmaking process, and more specifically, in the melting furnace in which reduced iron is charged with coal to produce pig iron, the charge is charged by installing a dispersion plate on the upper coal inlet side. A method for controlling distribution.
일반적으로, 각종 환원철(DRI : Direct Reduced Iron)과 석탄을 사용하는 2단계 제선 공정으로서, 신제선공정이 새로운 용선 제조 공법으로 채택되어 조업이 수행되고 있다. In general, as a two-stage steelmaking process using various direct reduced iron (DRI) and coal, the new steelmaking process is adopted as a new molten iron manufacturing method, and operation is being performed.
신제선공정은 도 1에 나타낸 바와 같이, 환원로(reduction shaft)와 용융로(melter-gasifier)로 구성되며, 연화 융착대가 존재하지 않아 그 조업이 고로(blast furnace)에 비해 다소 단순하다.As shown in FIG. 1, the new steelmaking process is composed of a reduction shaft and a melter-gasifier, and the operation is somewhat simpler than that of a blast furnace since no softening fusion zone exists.
도 2는 현재 조업중인 용융로에서의 장입물 상부 분포 특성을 나타낸다. Figure 2 shows the charge up distribution characteristics in the melting furnace currently in operation.
이를 참조하면, 용융로 직상부에 위치한 석탄장입구를 통해 석탄이 자연낙하하여 장입된 장입물의 표면 형상은 역V형태를 이루며, 따라서, 노중심부에 작은 입자의 석탄이 많고, 주변부에는 비교적 큰 입자의 석탄이 쌓이게 된다.Referring to this, the surface shape of the charged material due to the natural fall of coal through the coal inlet located directly above the melting furnace forms an inverted V shape. Therefore, there is a large amount of small particles of coal in the furnace center and relatively large particles in the peripheral part. Coal will accumulate.
이로 인하여 주변으로의 가스흐름 즉, 주변류가 지배적이어서, 노체 열부하가 커져, 용융로 조업에 영향을 미치게 된다.As a result, the gas flow to the surroundings, i.e., the surrounding flow, becomes dominant, thereby increasing the furnace heat load and affecting the furnace operation.
또한, 석탄 분포시 편석으로 인하여 원주방향의 슬래그(slag) 염기도 불균형이 일어나 이 또한 가스흐름에 영향을 미친다. 즉, 석탄이 벽부보다 중심부에 상대적으로 많이 분포하여, 석탄연소에 따른 재(ash) 발생으로 SiO2량이 증가하여, 슬래그 중의 염기도가 벽부의 슬래그 염기도와 차이를 보이게 된다.In addition, due to segregation during coal distribution, slag base in the circumferential direction is also imbalanced, which also affects gas flow. That is, the coal is distributed more in the center than the wall portion, the amount of SiO 2 increases due to ash generated by the combustion of coal, the basicity in the slag is different from the slag basicity of the wall portion.
도 3은 용융로에서의 슬래그 조성 및 염기도를 보여주는 도면으로서, 화살표 부근의 슬래그가 용융로에서 생성되는 슬래그 조성이다.3 is a diagram showing slag composition and basicity in a melting furnace, in which slag near the arrow is produced in the melting furnace.
여기서, 석탄의 편석이 발생하면, 중심부에서의 슬래그 염기도는 아래 화살표 부근에서 생성되고, 주변부 슬래그는 윗 화살표 부근에서 생성되어, 그 차이가 발생됨에 따라 가스류 분포의 불균형이 초래된다. 즉, 주변류가 형성되어 용융로 조업에 영향을 미치게 된다.Here, when segregation of coal occurs, the slag basicity at the center is generated near the down arrow, and the peripheral slag is generated near the up arrow, and as the difference occurs, an unbalance of the gas flow distribution is caused. In other words, a periphery is formed that affects the operation of the furnace.
그러나, 아직까지 신제선공정에 있어서 용융로 장입물 분포를 제어하는 기술이 제안된 바는 없었다.However, no technique has yet been proposed for controlling the distribution of the melting furnace contents in the new steelmaking process.
본 발명은 상기와 같은 제반 문제점을 해결하기 위하여 창안된 것으로서, 용융로의 석탄장입구 입구에 분산판을 설치하는 것에 의해 장입물 표면 형상을 평탄하게 개선하고, 석탄 분포에 있어서 편석을 방지하여, 중심류를 확보하는 방법을 제공하는데 그 목적이 있다.The present invention has been devised to solve the above problems, by providing a distribution plate at the inlet of the coal charging inlet of the melting furnace to improve the surface shape of the charge flat, prevent segregation in the coal distribution, the center Its purpose is to provide a way to secure the security.
본 발명의 다른 목적 및 장점들은 하기에 설명될 것이며, 본 발명의 실시에 의해 알게 될 것이다. 또한, 본 발명의 목적 및 장점들은 첨부된 특허청구범위에 나타낸 수단 및 조합에 의해 실현될 수 있다.Other objects and advantages of the invention will be described below and will be appreciated by the practice of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the appended claims.
상기와 같은 목적을 달성하기 위한 본 발명의 용융로 조업방법은, 석탄과 환원철을 장입하여 선철을 생산하는 신제선공정의 용융로 조업에 있어서, 상기 용융로의 상부 석탄장입구 입구에 분산판을 설치하며, 상기 분산판은 평면의 다수개의 원형네트로 구성되어 있으며, 상기 원형네트간의 간극은 중심측이 상기 석탄입자의 최대치에 상응하도록 하고, 주변측이 상기 석탄입자의 최소치에 상응하는 간극으로 하여, 상기 용융로 중심부에 큰 석탄입자가 장입되고, 주변부로 작은 석탄입자가 장입되어 퇴적되도록 유도함으로써, 상기 용융로 내부에서 평탄한 장입물 분포가 확보되도록 하는 것을 특징으로 한다.Melting furnace operating method of the present invention for achieving the above object, in the operation of the melting furnace of the new steelmaking process to charge the coal and reduced iron to produce pig iron, install a distribution plate at the inlet of the upper coal entrance of the melting furnace, The dispersion plate is composed of a plurality of circular nets of the plane, the gap between the circular nets so that the center side corresponds to the maximum value of the coal particles, the peripheral side is the gap corresponding to the minimum value of the coal particles, the melting furnace The large coal particles are charged in the center portion, and the small coal particles are charged and deposited at the periphery, thereby ensuring a flat load distribution inside the melting furnace.
이하, 첨부된 도면을 참조로 본 발명을 상세히 설명하기로 한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도 4는 본 발명에 따른 장입물 분포 제어를 위한 분산판를 보여주는 도면이다.4 is a view showing a dispersion plate for the charge distribution control according to the present invention.
상기 분산판은 신제선공정의 용융로에 있어서, 석탄이 장입되는 석탄장입구 입구에 설치되며, 도시된 바와 같이, 평면의 다수개 원형네트로서 구성되어 있다.In the melting furnace of the new steelmaking process, the dispersion plate is installed at the inlet of the coal charging port into which coal is charged, and as shown, is configured as a plurality of flat circular nets.
바람직하게, 상기 분산판은 상기 석탄장입구의 내경에 맞는 외경을 가진 것일 수 있으며, 입구이외에 상기 석탄장입구의 석탄이 장입되는 라인상 어느 곳에도 설치될 수 있다.Preferably, the dispersion plate may have an outer diameter suitable for the inner diameter of the coal charging hole, and may be installed anywhere on the line where the coal of the coal charging hole is charged in addition to the inlet.
그리고, 평탄한 장입물 분포 형상을 확보하기 위하여, 원형네트간의 사이간극에 있어서, 중심측에는 장입되는 석탄입자 크기의 최대치에 상응하도록 하고, 주변측에는 석탄입자의 최소치에 상응하는 간극으로 하여, 큰 석탄입자는 용융로 중심부에, 그리고 작은 석탄입자는 노주변부로 퇴적되도록 유도하게 된다.In order to ensure a flat load distribution shape, in the gap between the circular nets, the center of the coal particle is made to correspond to the maximum value of the size of coal particles to be charged, and on the peripheral side of the gap, the gap is corresponding to the minimum of the coal particles. In the center of the furnace, and small coal particles are attracted to the periphery of the furnace.
도 5는 상술한 분산판을 적용했을 때의 용융로 장입물 상부 분포 형상을 보여준다.5 shows the shape of the melting furnace charge upper distribution when the above-described dispersion plate is applied.
이를 참조하면, 장입물 상부 분포 형상이 평탄하게 되었으며, 이로써 석탄 분포 범위가 확대되고, 편석이 방지되어, 균질한 슬래그(도 3의 두 화살표가 지시하는 부분)의 형성이 가능해지므로, 노내 가스흐름이 중심류로 변화하게 되어, 용융로의 조업이 안정화되게 된다.Referring to this, the contents of the top distribution of the charges are flattened, thereby expanding the coal distribution range and preventing segregation, thereby allowing the formation of a homogeneous slag (a portion indicated by the two arrows in FIG. 3), and thus the gas flow in the furnace. This central flow changes, and the operation of the melting furnace is stabilized.
이상과 같이, 본 발명은 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 이것에 의해 한정되지 않으며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해, 본 발명의 기술사상과 아래에 기재될 특허청구범위의 균등 범위 내에서 다양한 수정 및 변형이 가능함은 물론이다.As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this, The person of ordinary skill in the art to which this invention belongs, Various modifications and variations are possible, of course, within the scope of equivalents of the claims set out below.
본 발명에 따르면, 석탄장입구 입구에 분산판을 설치하는 것에 의해 큰 석탄입자가 중심부에 퇴적되어 평탄한 장입물 상부 분포가 확보되게 함으로써, 중심류를 확보하여 안정적인 용융로 조업을 가능하게 하는 효과가 있다.According to the present invention, by installing a dispersion plate at the inlet of the coal charging inlet, large coal particles are deposited at the center to ensure a flat distribution of the upper contents of the coal, thereby ensuring a central flow to enable stable melting furnace operation. .
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| KR1020010084430A KR100588529B1 (en) | 2001-12-24 | 2001-12-24 | Operation method of melter-gasifier |
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| KR1020010084430A KR100588529B1 (en) | 2001-12-24 | 2001-12-24 | Operation method of melter-gasifier |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57174403A (en) * | 1981-04-21 | 1982-10-27 | Nippon Steel Corp | Operation method for blast furnace |
| KR19990048264A (en) * | 1997-12-09 | 1999-07-05 | 이구택 | General coal distribution device of melt reduction facility |
| KR20010054550A (en) * | 1999-12-07 | 2001-07-02 | 이구택 | Device for preventing back mixture in a fluidized bed reactor |
| KR20010064377A (en) * | 1999-12-29 | 2001-07-09 | 이구택 | Charging method of sized ore for blast furnace |
-
2001
- 2001-12-24 KR KR1020010084430A patent/KR100588529B1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57174403A (en) * | 1981-04-21 | 1982-10-27 | Nippon Steel Corp | Operation method for blast furnace |
| KR19990048264A (en) * | 1997-12-09 | 1999-07-05 | 이구택 | General coal distribution device of melt reduction facility |
| KR20010054550A (en) * | 1999-12-07 | 2001-07-02 | 이구택 | Device for preventing back mixture in a fluidized bed reactor |
| KR20010064377A (en) * | 1999-12-29 | 2001-07-09 | 이구택 | Charging method of sized ore for blast furnace |
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