JPS59179705A - Method of protecting blast furnace bottom - Google Patents
Method of protecting blast furnace bottomInfo
- Publication number
- JPS59179705A JPS59179705A JP5321683A JP5321683A JPS59179705A JP S59179705 A JPS59179705 A JP S59179705A JP 5321683 A JP5321683 A JP 5321683A JP 5321683 A JP5321683 A JP 5321683A JP S59179705 A JPS59179705 A JP S59179705A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- pipe
- block
- cooling
- molten iron
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
- C21B7/106—Cooling of the furnace bottom
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、高炉炉底部のカーボンブロックの局部損耗
を防止し炉体の長寿命全実現し得る高炉炉底部の保護方
法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for protecting the bottom of a blast furnace, which can prevent local wear of carbon blocks at the bottom of a blast furnace and achieve a long life of the furnace body.
従来、高炉炉底部は周知のととく耐溶銑性、耐スラグ性
、旧アルカリ性、冷却効果の観点からカーdεン質耐火
物を主体に構成されている。しかしながら長期の操業に
より、万一ボン員耐火物のブロック(以後、カーボンブ
ロックと略称する)が次第に炉内側より損耗してくるこ
と、熱影響によりカーボンブロックの内部に脆弱層がで
きることから、外来成分の侵入や一体+(°t7造を保
情する力が弱まり、損耗速度が急速にあがり、この結果
局部溶(ハすなわちノラクロ型侵食を冗/1−する。こ
のような状態は高炉操業上極めて問題となるため、し1
jえば鉄皮外側より散水を行ってカーボンブロック全冷
却するか、あるいは夾公昭!’17−46353号公報
等に記載された考案なとのように建設mfにあらかじめ
炉底に冷却朽造を組込trか、σらPζはステーブ全配
置する方法等がに、J知である。し刀・しこのような手
段金曜じたとしても冷却効果がカーデンブロック株tJ
b面(浴場接触面)まで及ばないことから、損耗速度全
大巾KN少するKに至らず、従って、長期間安定1−た
高炉操業を達成することかで@なかった。Conventionally, the bottom of a blast furnace has been mainly composed of carbonaceous refractories from the viewpoints of well-known hot metal resistance, slag resistance, old alkalinity, and cooling effect. However, due to long-term operation, the refractory block (hereinafter referred to as carbon block) will gradually wear out from the inside of the furnace, and a weak layer will form inside the carbon block due to thermal effects. The ability to protect the structure is weakened, the rate of wear increases rapidly, and this results in localized melting (i.e., Norakuro-type erosion). Because it becomes a problem,
If so, either spray water from the outside of the iron skin to completely cool the carbon block, or else! It is known that a method of installing a cooling structure in the bottom of the hearth in the construction mf in advance, as described in the '17-46353 publication, or of arranging all the staves for σ and Pζ, etc. . Even if such measures as Shito and Shiko are used on Fridays, the cooling effect will be
Since it does not reach the b-plane (bath contact surface), the wear rate does not reach K, which decreases the total width KN, and therefore it is difficult to achieve stable blast furnace operation for a long period of time.
この発明は上述した間萌点k A’l:決するためにな
されたもので、その特徴とするところは、高炉炉底及び
該炉底に連続する湯溜部下部局壁に設けた、炉内に連通
ずる冷却媒体流路を介して冷却媒体(例えばグロパンガ
ス等)全抽入し、該?イげ却媒体の分解熱による冷却効
果で、前記炉底及びGb fm都下部周壁の溶湯接触面
(カーボンブロックの稼動面)に溶銑あるいけスラグの
付着物を生じさせることにあり、これによって高炉炉底
部の長寿命化を実現し得る高炉炉底部の保護方法を提供
するにある。This invention was made in order to determine the above-mentioned molten point kA'l, and its characteristics are as follows. A cooling medium (eg, gropan gas, etc.) is completely extracted through a communicating cooling medium flow path, and the cooling medium is completely extracted. The cooling effect caused by the decomposition heat of the blasting medium causes deposits of hot metal or slag to form on the molten metal contact surface (the working surface of the carbon block) of the furnace bottom and the lower peripheral wall of the Gb fm. An object of the present invention is to provide a method for protecting the bottom of a blast furnace, which can extend the life of the bottom of the furnace.
本発明者等は、本発明の完成に先立って種々研究全軍ね
た結果、従来の炉底部への炉外方からの冷却能強化手段
に代わり、耐火物の溶湯接触面いわゆる稼動面に、溶銑
あるいけスラグの冷却によって生成する付着物を形成嘔
せ、この付着物によって炉底部耐火物の保護全行なうこ
とに着目し、本発明の完成をみたのである。As a result of extensive research conducted prior to the completion of the present invention, the inventors of the present invention discovered that, in place of the conventional means for enhancing cooling capacity from the outside of the furnace to the bottom of the furnace, the molten metal contact surface of the refractory, the so-called working surface, The present invention was completed by focusing on the fact that the deposits formed by cooling the hot metal or slag are removed, and that the deposits completely protect the refractories at the bottom of the furnace.
上述した付着物を生成させる物質即ち冷却媒体としては
、例えば炭化水素例えばメタン、エタン、グロパン、ブ
タン、または蒸気状をなす軽油を吹込むこともできる。As the above-mentioned deposit-forming substance or cooling medium, it is also possible, for example, to blow in hydrocarbons such as methane, ethane, glopane, butane, or light oil in vapor form.
さらKまた、炭化水素の含有量のどくに多い、例えば天
然ガス、コークス炉ガスのようなガス全f内に吹込む。Moreover, it is also blown into a gas having a high hydrocarbon content, such as natural gas or coke oven gas.
上記のような冷却媒体の炉内への通人は、炉底部耐火物
に、該冷却媒体流路を形成することで実現出来、この一
実施例を図面にもとづいて以下に述べる。The passage of the cooling medium into the furnace as described above can be realized by forming a passage for the cooling medium in the bottom refractory of the furnace, and one embodiment of this will be described below based on the drawings.
炉底のカーボンブロックJは炉底定盤2よシ順次一段ご
と築造していくが、灯数の最上段に第4図に示すごとく
カーがンブロック内部に冷却がスパイ7°3を通す孔4
を穿設したものを適用する。The carbon block J at the hearth bottom is built step by step from the hearth bottom surface plate 2, and at the top of the number of lights, as shown in Figure 4, there is a hole through which the cooling spy 7°3 passes inside the carbon block. 4
Apply the one with the perforation.
この孔4を設けたブロック1は高炉鉄皮の半径と平行に
一方の鉄皮側から築造していく。この場合ブロック1を
積んだ後、冷却用がスの通るパイプ3を配管する。冷却
用の1?イブ3はカーがンブロック長さよシわずかに長
くしておけば芯のずれがなくブロック築造後の配管が容
易になる。The block 1 provided with the holes 4 is constructed from one shell side parallel to the radius of the blast furnace shell. In this case, after the blocks 1 are loaded, a pipe 3 through which a cooling gas passes is installed. 1 for cooling? If Eve 3 is made slightly longer than the length of the car block, the core will not shift and piping will be easier after the block is constructed.
炉底に垂直方向の冷却ガス用吹出し口を取シ付ける場合
はカーボンブロック1のパイプ3に垂直方向吹出しノズ
ル5を取シ付はブロック1にあらかじめ作っておいた穴
6におさめることで簡単に取シ付けることができる。こ
れらのパイプ(ノズル)の接合は溶接で行ない、カービ
ンブロック1間の目地には従来のモルタルを使用する。When installing a vertical cooling gas outlet on the bottom of the furnace, attach the vertical outlet nozzle 5 to the pipe 3 of the carbon block 1 easily by fitting it into the hole 6 previously made in the block 1. Can be installed. These pipes (nozzles) are joined by welding, and conventional mortar is used for the joints between the carbine blocks 1.
このようにして順次カーボンブロック1に冷却用パイプ
3を組み込んだカーボンブロック積みができ上る。In this way, a stack of carbon blocks is completed in which the cooling pipes 3 are sequentially incorporated into the carbon blocks 1.
冷却用ノズルの配置は通常のノラクロ侵食ライン7を推
定してかつ極めて損耗の大きい炉底コーナ一部13に重
点的に配置する。たとえば円周方向で1mごと、半径方
向では、1.5mごとにする。The arrangement of the cooling nozzles is based on the normal Noracro erosion line 7, and they are placed mainly in the hearth bottom corner part 13 where wear and tear is extremely large. For example, every 1 m in the circumferential direction, and every 1.5 m in the radial direction.
ノズル3の形状は、内側バイア″8に外側パイプ9を若
干のギャップを持たせて組み合わせて、ブロック1の孔
4にモルタル10などを用いて挿入した二重管タイプの
ノズルを用いる。内管8の径は10〜30111111
%外管とのすきまは数叫のオーダーとし、モルタル10
を用いて、カーボンブロック1に設置すれば簡単に取り
付けられる。またノズル全体を耐火物・母イブやポーラ
スプラグ状にしても良い。The shape of the nozzle 3 is a double-tube type nozzle in which an inner via ``8'' and an outer pipe 9 are combined with a slight gap, and the nozzle is inserted into the hole 4 of the block 1 using mortar 10 or the like.Inner tube The diameter of 8 is 10~30111111
% The clearance with the outer pipe should be on the order of several yen, and the mortar should be 10
It can be easily attached by installing it on the carbon block 1 using. Further, the entire nozzle may be made of refractory material, motherboard, or porous plug.
このようにして、冷却用ガスを流すパイプ3を内蔵した
カーボンブロック1を、築造したのち炉の外側のガス本
管12に接合する。ガス本管12は、カーピンブロック
1に内蔵させfr−/、eル3bの本数で灯数用と炉底
壁用に分割させた方が、安定した冷却ガスを流すことが
できる。また火入れ初期のカーボンブロック1へのヒー
トショックを防ぐため通常、稼動面側へ粘土れんがを築
造するがこの場合冷却用がスの吹き出し孔を設けてモジ
造する。In this way, the carbon block 1 containing the pipe 3 for flowing the cooling gas is constructed and then joined to the gas main pipe 12 outside the furnace. If the gas main pipe 12 is built into the car pin block 1 and divided into one for the number of lamps and one for the furnace bottom wall according to the number of fr-/el 3b, a stable cooling gas can flow. Furthermore, in order to prevent heat shock to the carbon block 1 at the initial stage of firing, clay bricks are usually constructed on the working surface side, but in this case, blow holes for cooling gas are provided and the construction is modified.
火入後溶銑が、発生を開始したときから灯数のカーボン
ブロック1のノズル3aJ:p冷却用ガスの吹き込みを
始める。高炉の操業がIll[il F?になシ出銑量
も増加を始めると、おそらく稼動面側の粘土れんがは損
耗が進み脱落する。それ以後、冷却ガスの作用でノズル
3b周辺の溶銑が冷却され、ノズル外管9とモルタル1
0の稼動面を足がかシとする溶銑の伺着物ができ始める
。これは、溶銑の温度、動きによシある稈度の厚みで損
耗と蓄積が均衡し最終的にはカーピンブロック1をつつ
み込んでしまう保護壁を作ることができる。すなわちカ
ーがンブロック1の損耗は溶銑自身の壁で防止されるこ
とになる。After ignition, the blowing of the cooling gas into the nozzles 3aJ:p of the carbon block 1 of the number of lamps is started from the time when the hot metal starts to be generated. Blast furnace operation is Ill [il F? When the amount of pig iron tapped starts to increase, the clay bricks on the working side will probably wear out and fall off. After that, the hot metal around the nozzle 3b is cooled by the action of the cooling gas, and the nozzle outer tube 9 and the mortar 1
A molten pig iron kimono, which uses the moving surface of the 0 as a foothold, begins to form. This is because wear and accumulation are balanced by the thickness of the culm depending on the temperature and movement of the hot metal, and a protective wall that eventually envelops the carpin block 1 can be created. In other words, wear and tear on the carn block 1 is prevented by the wall of the hot metal itself.
高炉の炉底に最初から孔を開けておくのは危険であると
いう考え方もあるが、ノズル3bへの溶銑流入は、冷却
ガスを音速程度で吹き込むと防止でき問題は無い。また
ノズル3bを閉塞させたい時は、マッドがンの如き不定
形充填材充填装置で充填材を押し込んでやればただちに
閉塞が可能であ多、事故防止にも利用できる。Although there is a view that it is dangerous to open a hole in the bottom of the blast furnace from the beginning, there is no problem because the flow of hot metal into the nozzle 3b can be prevented by blowing cooling gas at about the speed of sound. Further, when it is desired to close the nozzle 3b, it is possible to immediately block the nozzle 3b by pushing the filler in with an amorphous filler filling device such as a mud gun, which can also be used to prevent accidents.
溶銑の保護壁の具体的な作成方法は冷却ガスの吹き込み
速度を約330 m/s程度に保つことである。The specific method for creating the hot metal protective wall is to maintain the cooling gas blowing speed at about 330 m/s.
これによりノズル3bを足とする地金付着が発生する。This causes the base metal to adhere to the nozzle 3b.
また速度を変えることで地金付着を広くしかつ扁平にす
ることが可能となる。Also, by changing the speed, it is possible to spread the base metal and make it flat.
このようにして、作成した地金付着は、力−ゼンブロッ
ク1の表面で適切な保護壁を作り出しカーボンブロック
1の溶損を防止する。このようにブロックの損耗が抑制
されるので従来の高炉ライニングのネック箇所が解消さ
れ長寿命化が達成されかつ円滑な高炉操築が行なえる。The base metal adhesion created in this way creates a suitable protective wall on the surface of the force-zen block 1 and prevents the carbon block 1 from being eroded. Since the wear and tear of the blocks is suppressed in this way, the bottlenecks of conventional blast furnace linings are eliminated, a longer service life is achieved, and the blast furnace can be operated smoothly.
第1図は、冷却用ガス配管を設置した高炉炉底のカーデ
ンプロックライニングの断面図、第2図は冷却用ガス吹
込みノズル、第3図、第4図は、カーボンブロック内の
冷却用配τ?を示す立付図。
1:力−ピンブロック、3:冷却用・やイゾ、3b:ノ
ズル、4ニブロツク内の孔、8:内管、9:外管、10
:モルタルFigure 1 is a cross-sectional view of the carden block lining at the bottom of the blast furnace where cooling gas piping is installed, Figure 2 is the cooling gas injection nozzle, and Figures 3 and 4 are the cooling arrangement inside the carbon block. τ? A standing view showing the. 1: Force-pin block, 3: Cooling/Izo, 3b: Nozzle, 4 Hole in the nib block, 8: Inner tube, 9: Outer tube, 10
:mortar
Claims (1)
、炉内に連通ずる冷却媒体流路を介して冷却亙体を通人
し、前記炉底及び湯溜部下部局壁の浴場接触面に伺漸物
全形成させることを特徴とする高炉炉底部の保護方法。A cooling body is passed through a cooling medium channel provided in the bottom of the blast furnace and a lower wall of the sump part that is continuous with the bottom of the furnace, and communicates with the inside of the furnace. A method for protecting the bottom of a blast furnace, characterized by completely forming a crack on the contact surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5321683A JPS59179705A (en) | 1983-03-29 | 1983-03-29 | Method of protecting blast furnace bottom |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5321683A JPS59179705A (en) | 1983-03-29 | 1983-03-29 | Method of protecting blast furnace bottom |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59179705A true JPS59179705A (en) | 1984-10-12 |
Family
ID=12936633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5321683A Pending JPS59179705A (en) | 1983-03-29 | 1983-03-29 | Method of protecting blast furnace bottom |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59179705A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109457074A (en) * | 2018-12-23 | 2019-03-12 | 济南荣庆节能技术有限公司 | Blast Furnace Bottom pressure resistance design scheme |
CN112662827A (en) * | 2020-12-09 | 2021-04-16 | 江苏沙钢集团有限公司 | Blast furnace protection method without using titanium ore |
-
1983
- 1983-03-29 JP JP5321683A patent/JPS59179705A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109457074A (en) * | 2018-12-23 | 2019-03-12 | 济南荣庆节能技术有限公司 | Blast Furnace Bottom pressure resistance design scheme |
CN109457074B (en) * | 2018-12-23 | 2020-09-11 | 济南荣庆节能技术有限公司 | Blast furnace bottom pressure-resistant design scheme |
CN112662827A (en) * | 2020-12-09 | 2021-04-16 | 江苏沙钢集团有限公司 | Blast furnace protection method without using titanium ore |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104327881B (en) | Liquid continuous slag-removal fixed bed gasification furnace and gasification method thereof | |
CN106121619B (en) | Ignition installation and its application for Underground Coal Gasification Process | |
JPS59179705A (en) | Method of protecting blast furnace bottom | |
TW202035705A (en) | Method for heating up hearth of blast furnace, and burner lance used for same | |
CN101900491A (en) | Cooling water jacket, preparation method thereof and high temperature smelting equipment with same | |
US3603571A (en) | Apparatus for melting scrap metal | |
JP7294830B2 (en) | A cooling structure for the outlet of a melting furnace and a method for manufacturing a metal plate block used in the cooling structure. | |
RU2710826C1 (en) | Lining of converter bottom with bottom tuyeres | |
CN112458223A (en) | Blast furnace tuyere belt structure | |
CN106350629B (en) | A kind of guard method of HIsmelt techniques melting and reducing inner lining of furnace | |
RU2210599C2 (en) | Iron making blast furnace and method of its functioning | |
SU1715862A1 (en) | Tuyere unit for bottom blowing | |
US3342473A (en) | Apparatus for delivering air and fuel to a blast furnace | |
Dutta et al. | Operation of Blast Furnace | |
JPS6132369B2 (en) | ||
JP3615673B2 (en) | Blast furnace operation method | |
JP2003171708A (en) | Protective device of tuyere for metallurgical furnace | |
US500387A (en) | Blast-furnace | |
JPS622237B2 (en) | ||
KR100406435B1 (en) | Oxygen Pipe Having a Firing Tip Included Carbon | |
Biswas et al. | Hot Stove and Hot Air Carrying System | |
JPH07224307A (en) | Method for repairing piping and the like used for cooling of blast furnace | |
Liu et al. | The Operation of Blowing Out, Blanking and Furnace Blowing Off | |
Liu et al. | Scaffolding | |
JPS5833287B2 (en) | Gutter for molten metal |