JPH0375276A - Castable refractory for silica removing spout in casting hearth bottom of blast furnace - Google Patents
Castable refractory for silica removing spout in casting hearth bottom of blast furnaceInfo
- Publication number
- JPH0375276A JPH0375276A JP1208609A JP20860989A JPH0375276A JP H0375276 A JPH0375276 A JP H0375276A JP 1208609 A JP1208609 A JP 1208609A JP 20860989 A JP20860989 A JP 20860989A JP H0375276 A JPH0375276 A JP H0375276A
- Authority
- JP
- Japan
- Prior art keywords
- erosion
- sic
- blast furnace
- refractory
- test
- 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.)
- Granted
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title description 4
- 238000005266 casting Methods 0.000 title description 2
- 239000000377 silicon dioxide Substances 0.000 title description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 23
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 239000011819 refractory material Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims abstract description 5
- 239000011823 monolithic refractory Substances 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 abstract description 15
- 238000005260 corrosion Methods 0.000 abstract description 15
- 238000004901 spalling Methods 0.000 abstract description 5
- 230000003628 erosive effect Effects 0.000 description 24
- 239000000463 material Substances 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000010998 test method Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 6
- 235000013980 iron oxide Nutrition 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- -1 boxide Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011300 coal pitch Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011301 petroleum pitch Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 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〕
本発明は、脱珪等溶銑の予備処理設備用、特に鉄酸化物
系処理剤を用いる高炉鋳床脱珪樋にライニングする耐火
組成物に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a refractory composition for lining desiliconization troughs for blast furnace casthouses, which are used for preliminary treatment equipment for hot metal such as desiliconization, and in particular, using iron oxide-based treatment agents. .
現在、溶銑の脱珪等の予備処理は、樋、混銑車又は溶銑
鍋で行われている。近年、この予備処理の条件が高級鋼
の需要増大から苛酷化し、これらの設備に使用されるラ
イニング耐火物の損傷増大をもたらし、高い耐用性を有
する耐火物の開発が要望されている。Currently, preliminary treatment such as desiliconization of hot metal is carried out in a gutter, a mixer car, or a hot metal pot. In recent years, the conditions for this pretreatment have become more severe due to the increased demand for high-grade steel, leading to increased damage to the lining refractories used in these facilities, and there is a demand for the development of refractories with high durability.
溶銑予備処理用耐火物としては、その優れた耐食性、耐
スポーリング性からＡｊ！２０ｔ：２０〜８０重量％、
ＳｉＣ：５〜２０重量％、Ｃ：０〜１０重量％のＡｌ−
０ａ Ｓ＋ＣＣ系耐火材が用いられている。As a refractory for hot metal pretreatment, Aj! is recommended for its excellent corrosion resistance and spalling resistance. 20t: 20-80% by weight,
SiC: 5-20% by weight, C: 0-10% by weight Al-
0a S+CC refractory material is used.
しかしながら、Ｆｅｏ、Ｆｅ２Ｏ３等の鉄酸化物を処理
剤として使用する溶銑予備処理、特に高炉出銑樋におけ
る脱珪では、溶融スラグがＦｅＯに富み、その樋材の侵
食が大きくなる。However, in hot metal pretreatment using iron oxides such as FeO and Fe2O3 as a treatment agent, particularly in desiliconization in blast furnace tap runners, the molten slag is rich in FeO, and the duct material is severely eroded.
この条件下においては、上記従来のＡｊｉＯａ−３ｉＣ
−Ｃ系耐火材中のＳｉＣ，ＣはＦｅＯにより、下式に示
す反応によって容易に酸化される。Under this condition, the above conventional AjiOa-3iC
-SiC and C in the C-based refractory material are easily oxidized by FeO through the reaction shown in the following formula.
Ｓ ｉｃ＋３Ｆａｏ−＊３Ｆｅ＋Ｓ ｉｏ＊＋ｃ。S ic+3Fao-*3Fe+Sio*+c.
Ｃ＋Ｆｅ０−＊Ｆｅ＋ＣＯ
このため、従来から溶銑予備処理設備に使用する耐火物
の耐食性向上のために、溶融スラグとの反応抵抗性を高
める手段の採用が試みられている。C+Fe0-*Fe+CO For this reason, in order to improve the corrosion resistance of refractories used in hot metal pretreatment equipment, attempts have been made to employ means to increase the resistance to reaction with molten slag.
例えば、特公昭６０−３３７８２号公報には、ＦｅＯと
の反応性を下げるための低ＳｉＣ，低Ｃ化が提案され、
ＳｉＣの含有量は５〜２０重量％が良いとさている。ま
た、その他にも溶銑予備処理用耐火物としてＳｉＣの含
有量を規定したものとして、特開昭６１−９９６４１号
公報には１０〜１５重量％とすることが記載され、また
特開昭６２−１４３８８０号公報には１２〜１８重量％
が適量と記載されている。For example, Japanese Patent Publication No. 60-33782 proposes low SiC and low C to reduce reactivity with FeO.
It is said that the content of SiC is preferably 5 to 20% by weight. In addition, JP-A No. 61-99641 states that the content of SiC as a refractory for hot metal pretreatment is set at 10 to 15% by weight; No. 143880 discloses 12 to 18% by weight.
is described as an appropriate amount.
さらには、特開昭６３−１１７９７５号公報にはＳｉＣ
の含有量の制限とは別に、酸化防止剤の添加による材料
の強化を図ることが記載されている。Furthermore, JP-A-63-117975 discloses SiC
Apart from limiting the content of , it is described that the material should be strengthened by adding an antioxidant.
また、さらに、特開昭６３〜１７２６５号公報には、Ｆ
ｅＯによるＳｉＣ，Ｃの酸化の問題を排除するために、
ＳｉＣ，Ｃを排除してＭｇＯを添加したＡ ｌ ｘ Ｏ
３−Ｍ ｇ Ｃ系材料が提案されている。Further, in Japanese Patent Application Laid-open No. 63-17265, F
To eliminate the problem of oxidation of SiC,C by eO,
Al x O with SiC, C excluded and MgO added
3-MgC based materials have been proposed.
しかし、従来のＡ １ｚＯクー５ｉＣ−Ｃ系材料におけ
る低ＳｉＣ，低Ｃ化では、処理条件が苛酷化すると、加
速度的に侵食が大きくなり、十分な耐用が得られない。However, when the conventional A1zO5iC-C type materials are made to have low SiC and low C, when the processing conditions become severe, erosion increases at an accelerated rate, and sufficient durability cannot be obtained.
また、ＡｉｔＯｓＭｇｏ系材料では長時間の使用におい
てはスラグの浸潤抑制も十分でなく、耐スポーリング性
にも劣り、安定した耐用を得ることができない。Furthermore, AitOsMgo-based materials do not sufficiently suppress slag infiltration during long-term use, have poor spalling resistance, and cannot provide stable service life.
そこで、本発明において解決すべき課題は、安定した耐
用性を有する溶銑予備処理設備用の耐火材料、特に不定
形耐火材を得るために、鉄酸化物を含有する処理剤を使
用した溶銑予備処理における耐火物の損傷メカニズムを
実炉使用後の試料から推察し、従来提案されていた損傷
メカニズムを否定し、新たな知見から高耐食性耐火物を
提供することにある。Therefore, the problem to be solved in the present invention is to perform hot metal pretreatment using a treatment agent containing iron oxide in order to obtain a refractory material for hot metal pretreatment equipment that has stable durability, especially a monolithic refractory material. The purpose of this study is to infer the damage mechanism of refractories from samples after use in actual reactors, deny the damage mechanisms previously proposed, and provide highly corrosion-resistant refractories based on new knowledge.
本発明は、鉄酸化物系処理剤を用いる溶銑予備処理設備
にライニングする不定形耐火物組成において、炭化珪素
を５５〜９０重量％含有し、残部は他の耐火材及び結合
材を配合してなることを特徴とする高炉鋳床脱珪樋用不
定形耐火物である。The present invention provides a monolithic refractory composition for lining hot metal pretreatment equipment using an iron oxide treatment agent, which contains 55 to 90% by weight of silicon carbide, and the remainder is blended with other refractory materials and binders. This is a monolithic refractory for use in blast furnace casthouse desiliconization troughs.
前記従来のＡｌｔｏｓ ＳＩＣＣ系の耐火物の耐食性
を向上するために低ＳｔＣ，低Ｃ化されたものでは、実
炉での使用結果では必ずしも良好な耐用は得られていな
い。また、実炉使用後の試料には、稼働表面にＦｅがか
なり多く観察されるが、従来の侵食試験では見られない
等、従来の侵食試験方法は実炉実績と相関がないと考え
られる。The conventional Altos SICC refractories, which have low StC and low C to improve their corrosion resistance, do not necessarily have good service life when used in actual furnaces. In addition, a considerable amount of Fe is observed on the operating surface of the sample after use in an actual furnace, but it is not observed in conventional erosion tests, and it is thought that the conventional erosion test method has no correlation with actual furnace results.
従来の侵食試験でかかるＦｅの存在が確認されないのは
、試験雰囲気及び撹拌条件等が実炉と異なっているため
と考えられる。The reason why the presence of Fe was not confirmed in the conventional corrosion test is considered to be because the test atmosphere, stirring conditions, etc. are different from those in the actual furnace.
本発明者等は実炉使用後の状態に類似した侵食形態を示
す試験方法を種々検討した結果、第１図に示するつぼ侵
食試験により、極めて実炉に近い状態が再現されること
を見出した。As a result of examining various test methods that show corrosion patterns similar to the conditions after use of an actual furnace, the inventors of the present invention found that conditions extremely close to those of an actual furnace can be reproduced by the pot erosion test shown in Figure 1. .
るつぼ侵食試験によると、材料中のＳｉＣ量と侵食性の
関係は、従来試験法と逆転傾向、即ち、ＳｉＣが多いも
の程、耐食性が良好である結果が得られる。According to the crucible corrosion test, the relationship between the amount of SiC in the material and the erodibility tends to be reversed from the conventional test method, that is, the more SiC there is, the better the corrosion resistance is.
これはＳｉＣの多量使用により処理剤中のＦｅＯの還元
が促進され、稼働面に連続したＦｅ層を形成し、スラグ
アタックを抑制するためと考えられる。従来良好とされ
ていた低ＳｉＣ量材料においては、ＦｅＯの還元が十分
ではなく、連続したＦｅコーティング層が生成しないた
めに侵食が進行する。This is thought to be because the use of a large amount of SiC promotes the reduction of FeO in the processing agent, forming a continuous Fe layer on the working surface and suppressing slag attack. In materials with a low SiC content, which were conventionally considered to be good, reduction of FeO is not sufficient and a continuous Fe coating layer is not formed, so that erosion progresses.
ＳｉＣとＣはＦｅコーティング層を生成させる効果は同
じであるが、Ｃは多量に添加すると不定形耐火物の添加
水分が増加し、組織劣化による耐用低下を生じるため、
ＳｉＣを多量に使用した材料の方が好ましい。SiC and C have the same effect of generating a Fe coating layer, but when C is added in large amounts, the added moisture of the monolithic refractory increases, causing a decrease in durability due to structural deterioration.
A material using a large amount of SiC is preferable.
本発明で使用するＳｉＣとしては、通常、純度が９５％
以上のものを使用するが、純度が８０％以上あれば使用
できる。それ未満では施工水分の増大をもたらし、組織
劣化、耐食性低下を生じることから好ましくない。The SiC used in the present invention usually has a purity of 95%.
The above substances can be used as long as they have a purity of 80% or more. If it is less than that, it is not preferable because it causes an increase in construction moisture, resulting in structural deterioration and a decrease in corrosion resistance.
ＳｉＣ量を５５〜９０重量％に規制する理由は、５５重
量％未満であると、Ｆｅコーティング層を形成させるに
は不十分であることから耐食性に劣り、また、９０重量
％より多い組成は、流し込み材或いはスタンプ材に不可
欠なバインダー等を添加する必要があることから、実質
上製造し得ないためである。The reason for regulating the amount of SiC to 55 to 90% by weight is that if it is less than 55% by weight, it is insufficient to form an Fe coating layer, resulting in poor corrosion resistance. This is because it is practically impossible to manufacture because it is necessary to add a binder etc. which are essential to the casting material or stamp material.
なお、配合残部については特に規制はないが、主原料と
して電融アルミナ、焼結アルミナ、ボーキサイド、容土
頁岩等のアルミナ質原料、もしくは、シャモット質原料
、スピネル質原料、更にはジルコン、ジルコニア等が使
用可能であり、副原料として、石炭系ピッチ、石油系ピ
ッチ、燐状黒鉛１人造黒鉛、土状黒鉛１石炭系コークス
、石油系コークス等のカーボン原料を使用するのが一般
的である。There are no particular regulations regarding the remaining blend, but the main raw materials may include alumina raw materials such as fused alumina, sintered alumina, boxide, and clay shale, chamotte raw materials, spinel raw materials, and even zircon, zirconia, etc. It is common to use carbon raw materials such as coal-based pitch, petroleum-based pitch, phosphorous graphite, artificial graphite, earthy graphite, coal-based coke, and petroleum-based coke as auxiliary raw materials.
結合剤としてはアルミナセメント、超微粉シリカ、粘土
、金属アルミ粉を使用することができ、その性分散剤等
の使用も可能である。As the binder, alumina cement, ultrafine silica, clay, metal aluminum powder can be used, and dispersants thereof can also be used.
メタルＦｅコーティングの効果を評価する新試験方法（
試験条件１：夷１図）及び従来試験方法（試験条件２：
第２図〉の２通りの方法で、炭化珪素（ＳｉＣ）添加材
料の侵食試験を行った。New test method to evaluate the effectiveness of metal Fe coating (
Test condition 1: Figure 1) and conventional test method (Test condition 2:
Erosion tests were conducted on silicon carbide (SiC)-added materials using the two methods shown in Figure 2.
その結果を第１表に示す。The results are shown in Table 1.
侵食試験条件１． （るつぼ侵食試験）試料 ６５
Ｘ６５ Ｘ６５ａｍに３０φ×３５市の穴を開け、そ
こに侵食剤を入れる。Erosion test conditions 1. (Crucible erosion test) Sample 65
Drill a hole of 30φ x 35mm in X65 x65am and put the corrosive agent there.
侵食剤 脱珪剤（ＦｅＯ：６５重量％。Erosion agent Desiliconization agent (FeO: 65% by weight.
Ｆｅ１Ｏａ：３０重量％）
侵食温度 １５００℃ｘ ｌ ｈｒｓ ｘ ５ ｃｙｃ
ｌｅｓ試験方法 上記試料に侵食剤を入れ、電気炉で所
定の温度で加熱する。試験後
試料断面の溶損面積を測定する。Fe1Oa: 30% by weight) Erosion temperature 1500℃ x l hrs x 5 cyc
LES test method A corrosive agent is added to the sample and heated at a predetermined temperature in an electric furnace. After the test, measure the area of erosion on the cross section of the sample.
〈侵食指数は、試料Ｎα４を１００とした指数で表示し
、数値が小さいほ
ど侵食量が少ないことを示す。）
侵食試験条件２．（回転侵食試験）
侵食剤 脱珪剤（ＦｅＯ：６５重量％。<Erosion index is expressed as an index with sample Nα4 as 100, and the smaller the value, the smaller the amount of erosion. ) Erosion test conditions 2. (Rotary erosion test) Erosion agent Silicification agent (FeO: 65% by weight.
Ｆｅ＊Ｏｓ：３０重量％）
侵食温度 １５００℃Ｘ３Ｑｍｉｎ Ｘ１０ｃｙｃｌｅ
ｓ侵食試験 試料を第２図に示すように回転ドラムに内
張すし、バーナーで所定
の温度にして侵食剤を投入し、上
記侵食温度で侵食する。試験後、
試料断面の溶損量を測定する。Fe*Os: 30% by weight) Erosion temperature 1500℃X3QminX10cycle
Erosion Test A sample is lined in a rotating drum as shown in Fig. 2, heated to a predetermined temperature with a burner, an erosive agent is added, and eroded at the above erosive temperature. After the test, measure the amount of erosion on the cross section of the sample.
なお、侵食指数は、試料Ｎα４を１００とした指数で表
示し、数値が小さいほど侵食量が少ないことを示す。Note that the erosion index is expressed as an index with sample Nα4 as 100, and the smaller the value, the smaller the amount of erosion.
本発明品である試料Ｎα７を脱珪傾注樋に内張すしたと
ころ、従来品である試料ＮＩＬ ２の低ＳｉＣ材料より
も耐食性が良く、通続量も５０．０００ｔｏｎから１０
０、０００ｔｏｎにのびた。When sample Nα7, which is a product of the present invention, was lined in a desiliconization pouring gutter, it showed better corrosion resistance than the low SiC material of sample NIL 2, which is a conventional product, and the throughput was reduced from 50,000 tons to 10
It reached 0,000 tons.
また、本発明品の使用後の試料から、従来品に比べ、メ
タルＦｅが耐火物稼働表面をコーティングし、ＦｅＯの
供給を阻止し、侵食を抑制しているのが確認された。Furthermore, from samples after using the product of the present invention, it was confirmed that, compared to the conventional product, metal Fe coated the working surface of the refractory, blocking the supply of FeO and suppressing corrosion.
（以下、この頁余白〉
〔発明の効果〕
本発明の不定形耐火物によって以下の効果を奏すること
ができる。(Hereinafter, this page margin) [Effects of the Invention] The monolithic refractories of the present invention can achieve the following effects.
（１） 高温下での各種鉄酸化物処理剤を使用する雰
囲気の下でも、耐腐蝕性、耐スポーリング性共優れてお
り耐用性が増大する。(1) Excellent corrosion resistance and spalling resistance, increasing durability even under high temperature atmospheres using various iron oxide treatment agents.
（２）従来のライニング材の調製を基本的に変える必要
がないので、従来の設備をそのまま利用できる。(2) Since there is no need to fundamentally change the preparation of conventional lining materials, conventional equipment can be used as is.
添付図はそれぞれ本発明の耐火材の試験方法を示す図で
ある。
第１図はるつぼ試験を示し、第２図は回転侵食試験を示
す。The attached figures are diagrams each showing a test method for the fireproof material of the present invention. Figure 1 shows the crucible test and Figure 2 shows the rotary erosion test.
Claims (1)
ニングする耐火組成物において、炭化珪素を５５〜９０
重量％含有し、残部は他の耐火材及び結合剤を配合して
なることを特徴とする高炉鋳床脱珪樋用不定形耐火物。1. In a refractory composition for lining hot metal pretreatment equipment using an iron oxide treatment agent, silicon carbide is added to 55 to 90%.
A monolithic refractory for use in blast furnace casthouse desiliconization troughs, characterized in that it contains % by weight and the remainder is a mixture of other refractory materials and binders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1208609A JPH066514B2 (en) | 1989-08-11 | 1989-08-11 | Unshaped refractories for blast furnace cast bed desiliconization gutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1208609A JPH066514B2 (en) | 1989-08-11 | 1989-08-11 | Unshaped refractories for blast furnace cast bed desiliconization gutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0375276A true JPH0375276A (en) | 1991-03-29 |
| JPH066514B2 JPH066514B2 (en) | 1994-01-26 |
Family
ID=16559046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1208609A Expired - Fee Related JPH066514B2 (en) | 1989-08-11 | 1989-08-11 | Unshaped refractories for blast furnace cast bed desiliconization gutter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH066514B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114149267A (en) * | 2021-11-18 | 2022-03-08 | 偏关县晋电化工有限责任公司 | Slag hole protection material for submerged arc furnace |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0277510A (en) * | 1988-09-13 | 1990-03-16 | Nippon Steel Corp | Refractory for covering iron tapping trough in blast furnace |
-
1989
- 1989-08-11 JP JP1208609A patent/JPH066514B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0277510A (en) * | 1988-09-13 | 1990-03-16 | Nippon Steel Corp | Refractory for covering iron tapping trough in blast furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114149267A (en) * | 2021-11-18 | 2022-03-08 | 偏关县晋电化工有限责任公司 | Slag hole protection material for submerged arc furnace |
| CN114149267B (en) * | 2021-11-18 | 2023-05-05 | 偏关县晋电化工有限责任公司 | Slag hole protecting material for submerged arc furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH066514B2 (en) | 1994-01-26 |
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