JPS63288972A - Mud material for blast furnace tap hole - Google Patents
Mud material for blast furnace tap holeInfo
- Publication number
- JPS63288972A JPS63288972A JP62123299A JP12329987A JPS63288972A JP S63288972 A JPS63288972 A JP S63288972A JP 62123299 A JP62123299 A JP 62123299A JP 12329987 A JP12329987 A JP 12329987A JP S63288972 A JPS63288972 A JP S63288972A
- Authority
- JP
- Japan
- Prior art keywords
- tap hole
- mud
- mud material
- binder
- blast furnace
- 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
- 239000000463 material Substances 0.000 title claims abstract description 31
- 239000011230 binding agent Substances 0.000 claims abstract description 13
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 12
- 239000004917 carbon fiber Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 6
- 229920005989 resin Polymers 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 5
- 239000000377 silicon dioxide Substances 0.000 abstract description 5
- 229920001187 thermosetting polymer Polymers 0.000 abstract description 4
- 239000000835 fiber Substances 0.000 abstract description 3
- 239000004927 clay Substances 0.000 abstract description 2
- 229910052681 coesite Inorganic materials 0.000 abstract 3
- 238000013329 compounding Methods 0.000 abstract 3
- 229910052593 corundum Inorganic materials 0.000 abstract 3
- 229910052906 cristobalite Inorganic materials 0.000 abstract 3
- 235000012239 silicon dioxide Nutrition 0.000 abstract 3
- 229910052682 stishovite Inorganic materials 0.000 abstract 3
- 229910052905 tridymite Inorganic materials 0.000 abstract 3
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 3
- 239000008188 pellet Substances 0.000 abstract 1
- 238000007788 roughening Methods 0.000 abstract 1
- 239000004575 stone Substances 0.000 abstract 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- -1 i.e. Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910001337 iron nitride Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は高炉出銑孔の閉塞に使用するマッド材に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mud material used for blocking a blast furnace tap hole.
高炉の大型化と高圧操業により、出銑孔の閉塞材、すな
わち、マッド材の使用条件を非常に苛酷なものとし、作
業性や耐食性だけでなく出銑孔の深度を長く、かつ、安
定させることが要求されている。すなわち、出銑孔の深
度と安定を確保することは、高炉下部の出銑孔周辺の炉
壁レンガを保護し、高炉の延命がはかれること、および
、出銑作業で残銑、残滓を減少させ、常に低い炉内溶銑
レベルで風圧変動の減少および機器故障等による突発休
風時の二次的被害の防止等が可能となり、操業の安定及
び安全性を確保することになる。As blast furnaces become larger and operate at higher pressures, the conditions for using the tap hole plugging material, i.e., mud material, have become extremely harsh, improving not only workability and corrosion resistance but also the long and stable depth of the tap hole. That is required. In other words, ensuring the depth and stability of the tap hole protects the furnace wall bricks around the tap hole in the lower part of the blast furnace, prolonging the life of the blast furnace, and reducing the amount of residual iron and residue during the tap operation. With a constantly low molten metal level in the furnace, it is possible to reduce wind pressure fluctuations and prevent secondary damage in the event of a sudden wind outage due to equipment failure, etc., ensuring operational stability and safety.
このようなマッド材としては、以下のような特性が要求
される。Such mud materials are required to have the following properties.
（１）マッドガンによる出銑孔充填作業を容易にするた
め、最適なねばりと可塑性を有すること。(1) It must have optimal stickiness and plasticity to facilitate tap hole filling with a mud gun.
（２）出銑孔に充填後に短時間で乾燥および焼結するこ
と。(2) Dry and sinter in a short time after filling the tap hole.
（３）焼結後の強度は焼結時間の長短によって、変動が
少なく開孔作業が容易であること。(3) The strength after sintering does not fluctuate depending on the length of sintering time, and drilling work is easy.
（４）溶滓、溶銑に対して耐食性がすぐれ、出銑孔の孔
径拡大が少なく、常に安定した出銑速度が得られること
。(4) Excellent corrosion resistance against molten slag and hot metal, little expansion of the tap hole diameter, and a stable tapping rate at all times.
（５）出銑孔に充填されたマッド材は急加熱に対する容
積安定性と、早強性により安定した深度を形成維持でき
ること。(5) The mud material filled in the tap hole has volume stability against rapid heating and can maintain a stable depth due to early strength.
である。これ等特性を具備させるため、従来から種々の
耐火物原料や粒度構成が検討されており、一般にアルミ
ナ、ろう石、シャモット、コークス、ピッチ粉、炭化珪
素、金属珪素、窒化珪素、窒化珪素鉄、耐火粘土等の耐
火原料に、バインダーとして、タールや熱硬化性樹脂（
主にフェノール樹脂）を用いたマッド材が使用されてい
る。このような原料よりなるマッド材をマッドガンによ
って出銑孔に充填するのであるが、炉内の内容物の動き
や溶銑、溶滓の激しい流下に対して十分に満足できる安
定した出銑孔深度が得られず、出銑孔上部の羽目を閉塞
したり、羽口孔間隔を広くしたりして対応している。し
かしながら、これ等の対応策は安定操業の面から炉内の
風量バランスが損なわれて好ましくない。It is. In order to provide these characteristics, various refractory raw materials and particle size compositions have been studied in the past, and generally include alumina, waxite, chamotte, coke, pitch powder, silicon carbide, silicon metal, silicon nitride, iron silicon nitride, Tar and thermosetting resin (
Mud materials (mainly phenolic resin) are used. Mud material made of such raw materials is filled into the tap hole using a mud gun, but the depth of the tap hole must be stable enough to withstand the movement of the contents in the furnace and the violent flow of hot metal and slag. As a result, measures have been taken by blocking the slats at the top of the taphole and widening the spacing between the tuyere holes. However, these countermeasures are not preferable from the viewpoint of stable operation because they impair the balance of air volume within the furnace.
種々の経験則や測定結果より、上記のように安定した出
銑孔深度が得られない理由は以下の如（であると考えら
れる。すなわち、従来のマッド材は充填可能な流動性を
得るために、タールや熱硬化性樹脂などの液体バインダ
ーを２０〜２５重量％添加している。その結果、出銑孔
内にマッド材を充填すると上記バインダーは高熱によっ
て急激にガス化され、このため、充填されたマッド材の
組織の崩れや、粗雑化が発生する。これによって出銑孔
の開孔時の横穴の発生や、出銑中の出銑孔の異常拡大と
いった現象が発生し、出銑孔深度が安定しなくなる。Based on various empirical rules and measurement results, it is thought that the reason why a stable tap hole depth cannot be obtained as described above is as follows. 20 to 25% by weight of a liquid binder such as tar or thermosetting resin is added to the steel.As a result, when the mud material is filled into the tap hole, the binder is rapidly gasified by high heat. The structure of the filled mud material collapses and becomes coarse.This causes phenomena such as horizontal holes when opening the tap hole and abnormal enlargement of the tap hole during tapping. The hole depth becomes unstable.
この発明は上記問題点に鑑みて提案されたものであって
、マッド材の引張り強度を増加させることによって組織
の崩れや粗雑化を防止できるマッド材を提供することを
目的とする。This invention has been proposed in view of the above-mentioned problems, and an object thereof is to provide a mud material that can prevent the structure from collapsing and becoming coarse by increasing the tensile strength of the mud material.
上記目的を達成するためにこの発明は以下のような手段
を採用している。即ち、ＳｉＯ□またはＡｌｚＯｉを主
成分とする耐火原料と、バインダーとよりなる基礎材料
に対して炭素繊維を０．０５〜０．４重量％添加したも
のである。In order to achieve the above object, the present invention employs the following means. That is, carbon fiber is added in an amount of 0.05 to 0.4% by weight to a base material consisting of a refractory raw material mainly composed of SiO□ or AlzOi and a binder.
これによりバインダーがガス化した後のマッド材の引張
り強度は大きくなり、結果として組織の崩れや粗雑化を
防止できるのである。This increases the tensile strength of the mud material after the binder is gasified, and as a result, it is possible to prevent the structure from collapsing and becoming coarse.
上記炭素繊維はスチールファイバー、ガラスファイバー
、樹脂ファイバーに比して４０℃〜７０℃（即ち、マッ
ドガンにてマッド材を押出する温度）４に於いて、滑り
がよく、作業性を損なわない利点がある。また、マッド
材中のバインダーが気化する４００〜５００℃において
固化したバインダーとカーボンファイバーが強固に結合
して引張り強度を増強させる。このため、作業性を低下
させることなしに、バインダーの気化による組織の崩れ
や粗雑化を防止することができる。Compared to steel fibers, glass fibers, and resin fibers, the above-mentioned carbon fibers have the advantage of being smoother at 40°C to 70°C (i.e., the temperature at which mud material is extruded with a mud gun) and do not impair workability. be. Further, the binder solidified at 400 to 500° C., when the binder in the mud material vaporizes, and the carbon fibers are strongly bonded to each other, thereby increasing the tensile strength. Therefore, it is possible to prevent the structure from collapsing and becoming coarse due to the vaporization of the binder, without reducing workability.
炭素繊維の形状は数ミリ、又はそれ以下の長さに切断し
たチョップ状のもの、又はチョップを熱硬化性樹脂に配
合したベレット状のものを用いる。The shape of the carbon fiber used is a chop-shaped one cut into lengths of several millimeters or less, or a pellet-shaped one made by blending chopped carbon fibers with a thermosetting resin.
このカーボンファイバーの添加量は０．０５〜０．４重
量％が適当である。０．０５重量％以下であると引張り
強度を増加させようとする本願の目的を殆ど達成できな
い。また、０．４重量％以上では作業性が低下して不都
合となる。The appropriate amount of carbon fiber added is 0.05 to 0.4% by weight. If it is less than 0.05% by weight, the objective of the present application, which is to increase the tensile strength, can hardly be achieved. Moreover, if it is 0.4% by weight or more, workability decreases and becomes inconvenient.
尚、本願マッド材に使用する耐火原料としてはＳｉＯ□
、Ａｌ２Ｏ，を主成分とするものが用いられ、アルミナ
、珪石、ろう石、シャモット、粘土等が挙げられる。そ
の他、コークス、炭化珪素、窒化珪素、ジルコン、金属
珪素、フェロシリコン。In addition, SiO□ is used as a refractory raw material for the mud material of this application.
, Al2O, are used, and examples thereof include alumina, silica, waxite, chamotte, and clay. Other materials include coke, silicon carbide, silicon nitride, zircon, metallic silicon, and ferrosilicon.
窒化珪素鉄等も使用でき、これ等を粒度調整して用いる
。Silicon iron nitride, etc. can also be used, and these are used after adjusting the particle size.
第１表はこの発明に係るマッド材と従来のマッド材との
配合と各マッド材の物理的特性を示したものである。バ
インダーとしてはタールを用いたものとフェノール樹脂
を用いたもの、それぞれを示した。Table 1 shows the composition of the mud material according to the present invention and conventional mud materials and the physical properties of each mud material. As the binder, one using tar and one using phenol resin are shown.
カーボンファイバーの径は２〜１０μｍであり、また、
長さ２〜５鶴のチョップ状のものを用いた。The diameter of the carbon fiber is 2 to 10 μm, and
Chopped pieces with a length of 2 to 5 cranes were used.
第１表からも明らかな如く、線変化率、見掛気孔率、か
さ比重、作業性とも従来品に比して遜色ないにもかかわ
らず、７００℃Ｘ２Ｈｒの曲げ強度は著しく大きくなっ
ており、以下に説明する実炉への適用結果とあいまって
、本願発明の目的が達成されていることが理解できる。As is clear from Table 1, although the linear change rate, apparent porosity, bulk specific gravity, and workability are comparable to conventional products, the bending strength at 700°C x 2 hours is significantly higher. Coupled with the results of application to an actual reactor described below, it can be seen that the object of the present invention has been achieved.
尚、作業性は４０℃に加熱したマッドを押出した時の押
出し荷重をマーシャル試験機を用いて測定した。Note that workability was determined by measuring the extrusion load when extruding mud heated to 40° C. using a Marshall testing machine.
第 １ 表
＊４０℃に力吻したマッドを押出した時の押出荷重をマ
ーシャツ４鵡剣幾を用いて測きした第２表はこのマッド
材を実炉に適用した場合の出銑孔深度等の特性を示した
ものである。Table 1 *The extrusion load when extruding the mud heated to 40℃ was measured using a Marshaat 4 Swordsman.Table 2 shows the tap hole depth etc. when this mud material is applied to an actual furnace. This shows the characteristics of
この表からも明らかな如く出銑孔深度は従来より深くな
っており、かつ、横穴の発生や孔径の異常拡大はいずれ
もなかった。これは前述の如く本願発明品はバインダー
の気化によってマッド材の組織が崩れることや粗雑化す
ることがないためである。As is clear from this table, the tap hole depth was deeper than before, and there were no side holes or abnormal enlargement of the hole diameter. This is because, as mentioned above, in the product of the present invention, the structure of the mud material does not collapse or become coarse due to the vaporization of the binder.
以上説明したように、この発明は耐火物基礎材料に対し
てカーボンファイバーを０．０５〜０．４重量％添加し
ているので、マッドガンによる作業性を低下させること
なく、バインダー気化後の引張り強度を保ち、組織の崩
れや粗雑化を防止でき、ひいては出銑孔の横穴の発生や
異常拡大を防止できる。As explained above, in this invention, 0.05 to 0.4% by weight of carbon fiber is added to the refractory base material, so the tensile strength after binder vaporization is improved without reducing workability with a mud gun. This can prevent the structure from collapsing and becoming coarse, and can also prevent the occurrence and abnormal expansion of side holes in the tap hole.
Claims (1)
原料と、バインダーとよりなる基礎材料に対して炭素繊
維を０．０５〜０．４重量％添加した高炉出銑孔のマッ
ド材。A mud material for blast furnace tapholes in which 0.05 to 0.4% by weight of carbon fiber is added to a base material consisting of a refractory raw material mainly composed of SiO_2 or Al_2O_3 and a binder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62123299A JPS63288972A (en) | 1987-05-20 | 1987-05-20 | Mud material for blast furnace tap hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62123299A JPS63288972A (en) | 1987-05-20 | 1987-05-20 | Mud material for blast furnace tap hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63288972A true JPS63288972A (en) | 1988-11-25 |
Family
ID=14857101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62123299A Pending JPS63288972A (en) | 1987-05-20 | 1987-05-20 | Mud material for blast furnace tap hole |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63288972A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999024624A1 (en) * | 1997-11-05 | 1999-05-20 | Basalt-Feuerfest Gmbh | Filling composition for blast furnace tap holes |
| US6281266B1 (en) | 1998-12-15 | 2001-08-28 | Nippon Crucible Co., Ltd. | Tap hole blocking material for metal melting apparatus |
| KR100919022B1 (en) * | 2002-12-13 | 2009-09-24 | 주식회사 포스코 | Method for preventing the bottom side wall of blast furnace from eroding, using silicone addtive |
| TWI712576B (en) * | 2018-03-22 | 2020-12-11 | 日商黑崎播磨股份有限公司 | Block mud |
-
1987
- 1987-05-20 JP JP62123299A patent/JPS63288972A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999024624A1 (en) * | 1997-11-05 | 1999-05-20 | Basalt-Feuerfest Gmbh | Filling composition for blast furnace tap holes |
| US6281266B1 (en) | 1998-12-15 | 2001-08-28 | Nippon Crucible Co., Ltd. | Tap hole blocking material for metal melting apparatus |
| KR100919022B1 (en) * | 2002-12-13 | 2009-09-24 | 주식회사 포스코 | Method for preventing the bottom side wall of blast furnace from eroding, using silicone addtive |
| TWI712576B (en) * | 2018-03-22 | 2020-12-11 | 日商黑崎播磨股份有限公司 | Block mud |
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