JPH028310A - Low si operating method in blast furnace - Google Patents
Low si operating method in blast furnaceInfo
- Publication number
- JPH028310A JPH028310A JP15748988A JP15748988A JPH028310A JP H028310 A JPH028310 A JP H028310A JP 15748988 A JP15748988 A JP 15748988A JP 15748988 A JP15748988 A JP 15748988A JP H028310 A JPH028310 A JP H028310A
- Authority
- JP
- Japan
- Prior art keywords
- coke
- auxiliary raw
- raw material
- blast furnace
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011017 operating method Methods 0.000 title description 2
- 239000000571 coke Substances 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 4
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 230000004907 flux Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、高炉の低Ｓｉ操業法に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for operating a blast furnace with low Si.
高炉から出銑される溶銑中のＳｉ含有量を低下させるこ
とについては、従来から種々の検討が重ねられてきたと
ころであり、このＳｉ含有量の低減は、ＳｉＯ□（Ｊ）
＋ｃ （ｓ） −＋ ５ｌｏ（ｙ） 十ｃｏ （ｙ）
・・・（１）ＳｉＯ（＃） ＋ Ｃ（ＪＬ）−＋
５ｉ（Ｊ）＋ｃｏ（ｙ） ・・・（２）上記（１）式
に従って、レースウェイ近傍のコークス中の灰分からＳ
ｉＯガスが発生し、そして、上記（２）式に従って、Ｓ
ｉＯが溶銑中のＣによって還元され、銑中に移行する。Various studies have been made to reduce the Si content in hot metal tapped from blast furnaces.
+c (s) −+ 5lo(y) 10co(y)
... (1) SiO (#) + C (JL) - +
5i (J) + co (y) ... (2) According to the above formula (1), S
iO gas is generated, and according to equation (2) above, S
iO is reduced by C in the hot metal and migrates into the pig iron.
第３図に、上記（１）式の反応に及ぼす、Ｃ／２０およ
びＭ２Ｏの影響を示す。なお、このときの試験条件は、
第１表に示す通シである。FIG. 3 shows the influence of C/20 and M2O on the reaction of formula (1) above. The test conditions at this time are:
The rules are shown in Table 1.
第１表
第３図から明らかなように、Ｃユ０またはＭｇＯの添加
量が増大するにつれて、Ｓｉ０ガスの発生量が減少する
ことがわかる。As is clear from Table 1 and FIG. 3, it can be seen that as the amount of C0 or MgO added increases, the amount of Si0 gas generated decreases.
従来、高炉内にＣ（１０まだはＭｇＯ源からなる副原料
を装入するために、例えば、高炉羽口から粉状の副原料
を炉内に吹き込む方法がとられている。Conventionally, in order to charge an auxiliary raw material consisting of a C (10 or MgO source) into a blast furnace, a method has been adopted, for example, in which a powdered auxiliary raw material is blown into the furnace through a blast furnace tuyere.
しかし、高炉羽目から粉状のＣ，２０’４たはＭ２Ｏ源
からなる副原料を炉内に吹き込む方法は、以下の問題を
有している。即ち、副原料を粉状に粉砕するための設備
が必要である。また、粉状の副原料を炉内に吹き込むた
めの設備が必要である。さらに、副原料の吹込みによっ
て高炉羽目に摩耗や破損が生じる。However, the method of blowing an auxiliary raw material consisting of powdered C, 20'4 or M2O source into the blast furnace from the blast furnace has the following problems. That is, equipment for pulverizing the auxiliary raw material into powder is required. Additionally, equipment for blowing powdered auxiliary raw materials into the furnace is required. Furthermore, the injection of auxiliary raw materials causes wear and damage to the blast furnace siding.
従って、この発明の目的は、ＣａＯ４たはＭ２Ｏ源から
−なる副原料を、高炉羽口から吹き適寸ずに、溶銑のＳ
ｉ含有量を低減することができる、高炉の低Ｓｉ操業法
を提供することにある。Therefore, an object of the present invention is to blow the auxiliary raw material consisting of CaO4 or M2O source from the blast furnace tuyere into the S of hot metal.
An object of the present invention is to provide a low-Si operating method for a blast furnace that can reduce the i content.
この発明は、Ｃ，，０またはＭｇＯ源からなる粒状副原
料を、炉内のコークス層内に装入し、かくして、溶銑中
のＳｉ含有量を低下させることに特徴を有するものであ
る。The present invention is characterized in that a granular auxiliary raw material consisting of a C,,0 or MgO source is charged into a coke layer in a furnace, thereby reducing the Si content in hot metal.
次に、この発明の高炉の低Ｓｉ操業法の一実施態様を図
面を参照しながら説明する。Next, one embodiment of the method for operating a blast furnace with low Si according to the present invention will be described with reference to the drawings.
第１図は、この発明の一実施態様によって高炉に原料を
装入したときの高炉の概略断面図である。FIG. 1 is a schematic sectional view of a blast furnace when raw materials are charged into the blast furnace according to an embodiment of the present invention.
第１図に示すように、この発明は、交互に層状に且つ上
下多段に装入されるコークスｌと鉱石２のうち・、コー
クスｌの層内に、粒径５から３０１ＴｒｒｎのＣａＯ４
たはＭｇＯ源からなる副原料（フランクス）３を装入す
るものである。高炉の安定操業を図るために、副原料３
は、コークスｌの層の炉内周縁部に装入するのが良い。As shown in FIG. 1, in the present invention, among coke l and ore 2 which are charged alternately in layers and in upper and lower stages, CaO4 with a particle size of 5 to 301 Trrn is added to the coke l layer.
In this case, an auxiliary raw material (Franks) 3 consisting of an MgO source or MgO source is charged. In order to ensure stable operation of blast furnaces, auxiliary raw materials 3
is preferably charged at the periphery of the coke layer in the furnace.
コークス層中に装入された副原料３は、コークスと共に
レースウェイ４近傍脣で降下し、コークス中の灰分から
発生するＳｉＯガスの発生を抑制して、溶銑中のＳｉ含
有量を低下させる。The auxiliary raw material 3 charged into the coke layer descends together with the coke near the raceway 4, suppresses the generation of SiO gas generated from the ash in the coke, and reduces the Si content in the hot metal.
マクネサイ） （Ｍｙｃｏ３）を５から３０調の粒径に
整粒したものからなる副原料を、第１図に示すように、
炉内周縁部のコークス層内に装入して、高炉操業を行っ
た。そして、副原料原単位と溶銑（温度１４８０から１
４９０°Ｃ）中のＳｉ含有量との関係を調べた。この結
果を第２図に示す。As shown in Fig. 1, an auxiliary raw material consisting of (Myco3) sized to a particle size of 5 to 30 is used.
The blast furnace was operated by charging it into the coke layer at the periphery of the furnace. Then, the basic unit of auxiliary raw materials and hot metal (temperature 1480 to 1
490°C) was investigated. The results are shown in FIG.
次に、副原料を５から３０論の粒径を有する生ドロマイ
ト（Ｊ、ＣＯ３，％ＣＯ３）に代えて、同様に、副原料
原単位と溶銑中のＳｉ含有量との関係について調べた。Next, the relationship between the basic unit of the auxiliary raw material and the Si content in the hot metal was similarly investigated by replacing the auxiliary raw material with raw dolomite (J, CO3, %CO3) having a particle size of 5 to 30 troms.
この結果を第２図に合わせて示す。The results are also shown in FIG.
第２図から明らかなように、副原料原単位量が増加する
につれて、溶銑中のＳｉ含有量が低下することがわかる
。As is clear from FIG. 2, it can be seen that as the basic unit amount of auxiliary raw materials increases, the Si content in the hot metal decreases.
以上説明したように、この発明によれば、ＣＯ，Ｏまた
はＭ２Ｃ源からなる副原料を、コークス層内に装入する
ことによって、従来のように高炉羽口に損傷を与えるこ
となく、高炉の低Ｓｉ操業が図れるといった有用な効果
がもたらされる。As explained above, according to the present invention, by charging the auxiliary raw material consisting of CO, O or M2C sources into the coke layer, the blast furnace can be heated without damaging the blast furnace tuyeres unlike the conventional method. Useful effects such as low Si operation can be achieved.
第１図は、この発明の一実施態様にょシ、高炉に鉱石お
よびコークスを装入した状態を示す断面図、第２図は、
副原料原単位と溶銑中のＳｉ含有量との関係を示すグラ
フ、第３図は、Ｍ、））Ｏ／ ５ｉ０２とＳｉＯガス発
生速度との関係を示すグラフである。
図面において、
ｌ・・コークス ２・・・鉱石、３・・・副原料
。FIG. 1 is a sectional view showing one embodiment of the present invention, in which ore and coke are charged into a blast furnace, and FIG.
FIG. 3 is a graph showing the relationship between the basic unit of auxiliary raw material and the Si content in hot metal, and FIG. 3 is a graph showing the relationship between M,))O/5i02 and the SiO gas generation rate. In the drawing, 1...Coke 2...Ore, 3...Auxiliary raw materials.
Claims (1)
のコークス層内に装入し、かくして、溶銑中のＳｉ含有
量を低下させることを特徴とする、高炉の低Ｓｉ操業法
。1. A low-Si operation method for a blast furnace, characterized in that a granular auxiliary material consisting of a CaO or MgO source is charged into a coke layer in a furnace, thereby reducing the Si content in hot metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15748988A JPH028310A (en) | 1988-06-25 | 1988-06-25 | Low si operating method in blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15748988A JPH028310A (en) | 1988-06-25 | 1988-06-25 | Low si operating method in blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH028310A true JPH028310A (en) | 1990-01-11 |
Family
ID=15650804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15748988A Pending JPH028310A (en) | 1988-06-25 | 1988-06-25 | Low si operating method in blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH028310A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07138624A (en) * | 1993-11-15 | 1995-05-30 | Nkk Corp | Operation of blast furnace |
| US5419599A (en) * | 1993-07-01 | 1995-05-30 | E. J. Brooks Company | Rotatable seal |
| JP2011512314A (en) * | 2008-02-20 | 2011-04-21 | シービーディー エナジー リミテッド | Reduction of silica |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61153209A (en) * | 1984-12-26 | 1986-07-11 | Nippon Kokan Kk <Nkk> | Low-s operation method in blast furnace |
| JPS61201709A (en) * | 1985-03-04 | 1986-09-06 | Sumitomo Metal Ind Ltd | Method for operating blast furnace to attain low si content |
-
1988
- 1988-06-25 JP JP15748988A patent/JPH028310A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61153209A (en) * | 1984-12-26 | 1986-07-11 | Nippon Kokan Kk <Nkk> | Low-s operation method in blast furnace |
| JPS61201709A (en) * | 1985-03-04 | 1986-09-06 | Sumitomo Metal Ind Ltd | Method for operating blast furnace to attain low si content |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5419599A (en) * | 1993-07-01 | 1995-05-30 | E. J. Brooks Company | Rotatable seal |
| JPH07138624A (en) * | 1993-11-15 | 1995-05-30 | Nkk Corp | Operation of blast furnace |
| JP2011512314A (en) * | 2008-02-20 | 2011-04-21 | シービーディー エナジー リミテッド | Reduction of silica |
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