JPH09132471A - Blast-furnace tap hole blocking material - Google Patents
Blast-furnace tap hole blocking materialInfo
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- JPH09132471A JPH09132471A JP7293008A JP29300895A JPH09132471A JP H09132471 A JPH09132471 A JP H09132471A JP 7293008 A JP7293008 A JP 7293008A JP 29300895 A JP29300895 A JP 29300895A JP H09132471 A JPH09132471 A JP H09132471A
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- nitride
- silicon nitride
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高炉出銑口閉塞材
に関するものである。The present invention relates to a blast furnace taphole plugging material.
【０００２】[0002]
【従来の技術】最近の高炉の大型化、高圧化に伴い、出
銑口閉塞材の使用条件も苛酷なものとなっており、高炉
における出銑口閉塞材に要求される特性も苛酷なものと
なっており、特に重要な特性としては下記３点が挙げら
れる： マットガンによる出銑口への充填が容易に行える施工
時の押出性を有し、且つ出銑口開孔時の開孔性が良いこ
と； 閉塞材を充填後、閉塞材が短時間で焼結し、使用時の
溶銑及びスラグの摩耗損傷に耐え得ること； 使用時の溶銑及びスラグによる化学的侵食に耐え、出
銑口径の拡大がなく、安定した出銑が長時間可能である
耐食性を有すること。2. Description of the Related Art With the recent increase in size and pressure of blast furnaces, the use conditions of taphole plugging materials have become severe, and the characteristics required of taphole plugging materials in blast furnaces are also severe. The most important properties are the following three points: The extrudability at the time of construction that can be easily filled into the tap hole by the mat gun, and the openability at the time of opening the tap hole After filling the plugging material, the plugging material sinters in a short time and can withstand wear damage of hot metal and slag during use; withstands chemical attack by hot metal and slag during use; It has corrosion resistance that enables stable tapping for a long time without any expansion of steel.
【０００３】これらの特性の中で、溶銑及びスラグに対
する耐摩耗性及び耐食性は、特に重要な特性である。こ
れらの特性を改良した出銑口閉塞材について、既に種々
開示されている。例えば、特公平１−59997号公報に
は、７４ミクロン以下のアルミナと７４ミクロン以下の
窒化珪素とを配合した耐火物原料にフェノール樹脂溶液
を添加し、混練したことを特徴とする高炉出銑口閉塞材
が提案されており、更に、窒化珪素の添加量は５〜２０
重量％の範囲内であるとしている。また、窒化珪素は鉄
分を含有するものであっても良い旨の記載もある。そし
て、該公報によれば、窒化珪素の添加効果として、窒化
珪素により形成されたＳｉＣ結合が閉塞材組織を密化
し、且つマトリックスを強化するため、結合強度が高く
なり、耐溶銑、耐スラグ性が良好になる旨開示されてい
る。[0003] Among these properties, wear resistance and corrosion resistance to hot metal and slag are particularly important properties. Various taphole closing materials with improved properties have already been disclosed. For example, Japanese Patent Publication No. 1-59997 discloses a blast furnace taphole characterized by adding a phenol resin solution to a refractory raw material containing a mixture of alumina of 74 microns or less and silicon nitride of 74 microns or less, and kneading the mixture. A plugging material has been proposed, and the addition amount of silicon nitride is 5-20.
Weight percent. There is also a statement that silicon nitride may contain iron. According to the publication, as an effect of adding silicon nitride, the SiC bond formed by silicon nitride densifies the structure of the plugging material and strengthens the matrix, so that the bonding strength is increased, and the hot metal resistance and the slag resistance are improved. Is disclosed to be good.
【０００４】また、特開平２−285014号公報には、アル
ミナ含有量８０％以上のアルミナ原料を主原料として使
用し、粒径４４μｍ以下の黒鉛を０.５〜４重量部と粒
径４４μｍ以下の窒化珪素鉄１５〜３０重量部とカオリ
ン粘土５〜１５重量部と残部の耐火材に残炭素有機化合
物を加えて混練したことを特徴とする高炉出銑孔用マッ
ド材が開示されている。このマッド材は、添加された窒
化珪素鉄が１４００℃以上の温度域で分解して窒素を放
出し、この窒素がカオリン粘土とカーボンの存在下で反
応してサイアロンを生成することにより耐食性を向上す
るものである。Japanese Patent Application Laid-Open No. 2-285014 discloses that an alumina raw material having an alumina content of 80% or more is used as a main raw material, and 0.5 to 4 parts by weight of graphite having a particle size of 44 μm or less and a particle size of 44 μm or less are used. 15 to 30 parts by weight of silicon iron nitride, 5 to 15 parts by weight of kaolin clay, and the remainder of the refractory material are kneaded with a residual carbon organic compound and kneaded. In the mud material, the added silicon iron nitride is decomposed in a temperature range of 1400 ° C. or more to release nitrogen, and the nitrogen reacts with kaolin clay in the presence of carbon to form sialon, thereby improving corrosion resistance. Is what you do.
【０００５】更に、特開平１−131080号公報には、窒化
珪素鉄２０重量部以上と炭素５〜２５重量部とカオリン
粘土５〜１５重量部と残部のその他の耐火材に揮発性有
機炭素化合物を加えて混練したことを特徴とする高炉出
銑孔用マッド材が開示されている。このマッド材は、３
ｍｍ以下の窒化珪素鉄を添加することにより耐食性を向
上させるものであり、該窒化珪素鉄としてはＳｉ3Ｎ4を
７０〜８０重量％、Ｆｅを１５重量％程度含有するもの
を使用している。Further, Japanese Patent Application Laid-Open No. 1-131080 discloses that volatile organic carbon compounds are used in an amount of at least 20 parts by weight of silicon nitride, 5 to 25 parts by weight of carbon, 5 to 15 parts by weight of kaolin clay, and the rest of other refractory materials. A blast furnace taphole mud material characterized by adding and kneading is disclosed. This mud is 3
is intended to improve the corrosion resistance by adding the following silicon nitride iron mm, as the nitride silicon iron Si 3 N 4 70-80 wt%, are used those containing about 15% by weight of Fe .
【０００６】即ち、従来の閉塞材は、アルミナや高珪酸
質原料を主体に、炭化珪素、コークス等のカーボン、粘
土、珪素等の金属あるいは合金並びに窒化珪素系添加物
を添加してものに、コールタール、フェノール樹脂等を
バインダーとして混練してなるものが一般的である。ま
た、窒化珪素系添加物については、７４ミクロンあるい
は４４ミクロン以下の微粉として５〜３０重量部、ある
いは３ｍｍ以下の場合には２０重量部以上添加すること
により耐食性の向上が認められるものである。That is, the conventional plugging material is mainly made of alumina or a high siliceous raw material, and further contains carbon or clay such as silicon carbide and coke, metal or alloy such as silicon, silicon, and a silicon nitride-based additive. It is common to knead coal tar, phenolic resin or the like as a binder. Further, with respect to the silicon nitride-based additive, the corrosion resistance is improved by adding 5 to 30 parts by weight as fine powder of 74 microns or 44 microns or less, or 20 parts by weight or more in the case of 3 mm or less.
【０００７】[0007]
【発明が解決しようとする課題】上述のような窒化珪素
系原料を使用した閉塞材においては、高温でＳｉＣ結合
を形成するため結合強度が強くなり、耐溶銑、耐スラグ
性が良好となり、出銑時間が延長される。しかし、その
効果は、Ｓｉ3Ｎ4含有量７０〜８０重量％の窒化珪素鉄
では２０重量部程度までは耐スラグ性の向上効果が認め
られるものの、それ以上での効果は小さく、３０重量部
以上では逆に耐スラグ性は低下する。また、Ｆｅを含ま
ない窒化珪素にあっては、添加による耐スラグ性の向上
効果は少ない。In the plugging material using the above-mentioned silicon nitride-based raw material, a SiC bond is formed at a high temperature, so that the bonding strength is increased, and the hot metal and slag resistance are improved. Pig time is extended. However, with silicon nitride having a Si 3 N 4 content of 70 to 80% by weight, the effect of improving the slag resistance is recognized up to about 20 parts by weight, but the effect is small when it is more than 30 parts by weight. Above, on the contrary, the slag resistance decreases. In addition, in the case of silicon nitride containing no Fe, the effect of improving slag resistance by addition is small.
【０００８】しかしながら、最近の高炉の大型化、操業
条件の苛酷化により高炉出銑口閉塞材への負担は極めて
高くなっている。また、経済性の面では、原単位低減、
作業環境での省力化等により出銑時間の延長、即ち、耐
食性の向上が望まれている。これに対し、前記のような
従来系の出銑口閉塞材では、耐用性が充分ではなく、出
銑時間の延長について充分満足できるものではなかっ
た。However, due to the recent increase in the size of the blast furnace and the severer operating conditions, the burden on the blast furnace tap hole plugging material has become extremely high. In terms of economics, the unit consumption has been reduced,
It is desired to extend the tapping time, that is, to improve the corrosion resistance, by saving labor in the working environment. On the other hand, the conventional tap hole plugging material as described above is not sufficiently durable and not sufficiently satisfactory in extending the tapping time.
【０００９】従って、本発明の目的は、多量の窒化珪素
系原料を使用することにより、耐スラグ性に優れた出銑
時間を大幅に延長することができる高耐用性の高炉出銑
口閉塞材を提供することにある。Therefore, an object of the present invention is to use a large amount of a silicon nitride-based raw material so as to significantly extend the tapping time, which is excellent in slag resistance, and has a high durability and a blast furnace tapping plug closing material. To provide.
【００１０】[0010]
【課題を解決するための手段】本発明者らは、窒化珪素
鉄中のＦｅ含有量、窒化珪素系原料との組み合わせ及び
添加量について種々検討を重ねた結果、高炉出銑口閉塞
材の窒化珪素系原料として窒化珪素鉄または窒化珪素鉄
と窒化珪素を使用し、且つ高炉出銑口閉塞材を構成する
原料の粉末部中のＦｅ含有量を制限することにより前記
目的を達成したものである。The present inventors have made various studies on the Fe content in silicon iron nitride, the combination with the silicon nitride-based raw material, and the amount of addition. The object has been achieved by using silicon iron nitride or silicon iron nitride and silicon nitride as a silicon-based raw material, and by limiting the Fe content in the powder portion of the raw material constituting the blast furnace taphole plugging material. .
【００１１】即ち、本発明の高炉出銑口閉塞材は、窒化
珪素鉄または窒化珪素及び窒化珪素鉄２０〜４５重量
％、炭素質原料５〜２５重量％、粘土５〜１５重量％及
び他の耐火原料１５〜７０重量％よりなる粉末部１００
重量部に、外掛で１０〜２５重量部の炭素含有結合材を
含有してなることを特徴とする。That is, the blast furnace taphole closing material of the present invention comprises silicon iron nitride or silicon nitride and silicon iron nitride 20 to 45% by weight, carbonaceous material 5 to 25% by weight, clay 5 to 15% by weight and other materials. Powder part 100 consisting of 15 to 70% by weight of refractory raw material
It is characterized in that 10 to 25 parts by weight of the carbon-containing binder is externally added to the parts by weight.
【００１２】[0012]
【発明の実施の形態】本発明は、窒化珪素系原料の中
で、Ｆｅを含まない窒化珪素は、耐スラグ性の著しい向
上は認められなく、むしろＦｅ含有量の多い窒化珪素鉄
において耐スラグ性の向上が認められる点に注目したも
のである。BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, among silicon nitride-based raw materials, silicon nitride containing no Fe does not show remarkable improvement in slag resistance. It is noted that the improvement of the performance is recognized.
【００１３】以下、本発明の高炉出銑口閉塞材について
詳述する。高炉出銑口閉塞材への窒化珪素系原料の添加
すると、閉塞材中には炭素質原料も存在するため、下記
反応でＳｉＣ結合を形成することが従来より言われてい
る： Ｓｉ3Ｎ4−−３Ｓｉ＋２Ｎ2 (１) Ｓｉ＋Ｃ−−ＳｉＣ (２)Hereinafter, the blast furnace tapping plugging material of the present invention will be described in detail. When a silicon nitride-based raw material is added to a blast furnace tap hole plugging material, since carbonaceous raw materials are also present in the plugging material, it is conventionally said that SiC bonds are formed by the following reaction: Si 3 N 4 −−3Si + 2N 2 (1) Si + C−−SiC (2)
【００１４】しかし、窒化珪素は比較的安定な物質であ
り、(１)式に示す分解反応は、１４００℃付近より徐々
に起こるものの、１５００℃程度まででは充分なＳｉＣ
結合は期待できない。一方、窒化珪素鉄の場合は、かな
り低温(１２００℃)より窒化珪素が窒化珪素鉄中のＦｅ
によって分解され、Ｎ2を放出するため、窒化珪素単味
の場合に比べ、比較的低温よりＦｅＳｉ及びＳｉＣが形
成されるため高範囲の温度域にわたって強度が強くな
り、耐溶銑、耐スラグ性が向上するため出銑時間の延長
が可能となる。しかし、窒化珪素鉄の添加量が多くなる
と、閉塞材中のＦｅ及びＦｅ2Ｏ3の量が多くなり、耐ス
ラグ性の低下を起こす。However, silicon nitride is a relatively stable substance, and although the decomposition reaction shown in the equation (1) occurs gradually from around 1400 ° C., sufficient SiC is not obtained up to about 1500 ° C.
No binding can be expected. On the other hand, in the case of silicon iron nitride, the silicon nitride is made of Fe in silicon iron nitride at a considerably low temperature (1200 ° C.).
Is decomposed and N 2 is released, so that FeSi and SiC are formed at a relatively low temperature as compared with the case of silicon nitride alone, so that the strength becomes stronger over a high temperature range, and the hot metal resistance and slag resistance are improved. It is possible to extend the tapping time because of the improvement. However, when the added amount of silicon iron nitride increases, the amounts of Fe and Fe 2 O 3 in the plugging material increase, and the slag resistance decreases.
【００１５】そこで、本発明の高炉出銑口閉塞材の粉末
部には、窒化珪素系原料として窒化珪素鉄または窒化珪
素鉄及び窒化珪素を２０〜４５重量％、炭素質原料を５
〜２５重量％、粘土５〜１５重量％及び他の耐火材料１
５〜７０重量％を使用するものである。Therefore, the powder portion of the blast furnace tapping plugging material of the present invention contains 20 to 45% by weight of silicon nitride or silicon iron nitride and silicon nitride as silicon nitride-based raw materials, and 5 to 5% of carbonaceous raw material.
-25% by weight, clay 5-15% by weight and other refractory materials 1
5 to 70% by weight is used.
【００１６】本発明に使用する窒化珪素系原料は、窒化
珪素鉄または窒化珪素鉄と窒化珪素である。ここで、窒
化珪素鉄としては従来品に比べてＦｅ含有量の少ないも
の、例えばＦｅ含有量が１５重量％以下程度のものを使
用することができる。また、窒化珪素系原料の粒度は、
０.３ｍｍ以下、望ましくは７５ミクロン以下のものが
好ましい。窒化珪素系原料の粒度が０.３ｍｍを超える
と耐食性向上の効果は少ない。また、窒化珪素系原料の
添加量は２０〜４５重量％、好ましくは２５〜４０重量
％の範囲内である。該添加量が２０重量％未満では、耐
スラグ性の向上効果が不充分であり、また、４５重量％
を超えると粉末部中の微粉部の量が多くなり過ぎて充分
な組織が得られないために好ましくない。The silicon nitride-based material used in the present invention is silicon iron nitride or silicon iron nitride and silicon nitride. Here, as the silicon iron nitride, those having a lower Fe content than conventional products, for example, those having an Fe content of about 15% by weight or less can be used. The particle size of the silicon nitride-based raw material is
It is preferably 0.3 mm or less, more preferably 75 μm or less. If the particle size of the silicon nitride-based raw material exceeds 0.3 mm, the effect of improving the corrosion resistance is small. The addition amount of the silicon nitride-based raw material is in the range of 20 to 45% by weight, preferably 25 to 40% by weight. If the amount is less than 20% by weight, the effect of improving the slag resistance is insufficient, and 45% by weight.
If it exceeds 300, the amount of the fine powder portion in the powder portion becomes too large, so that a sufficient structure cannot be obtained.
【００１７】また、本発明の高炉出銑口閉塞材におい
て、粉末部のＦｅ含有量が１.４〜３.０重量％、好まし
くは１.７〜２.８重量％となるように窒化珪素系原料を
配合することが好ましい。ここで、粉末部中のＦｅ含有
量が１.４重量％未満では耐スラグ性が低下するために
好ましくなく、また、３.０重量％を超えると同様に耐
スラグ性が低下するために好ましくない。In the blast furnace taphole closing material of the present invention, the silicon content is adjusted so that the Fe content in the powder portion is 1.4 to 3.0% by weight, preferably 1.7 to 2.8% by weight. It is preferable to add a system raw material. Here, if the Fe content in the powder portion is less than 1.4% by weight, the slag resistance is lowered, which is not preferable, and if it exceeds 3.0% by weight, the slag resistance is lowered, similarly. Absent.
【００１８】次に、本発明の高炉出銑口閉塞材の粉末部
に使用される炭素質原料としては、例えば黒鉛、コーク
ス、石炭粉、カーボンブラック、各種ピッチ粉末、各種
樹脂粉末等を挙げることができる。この炭素質原料は、
Ｓｉとの反応によるＳｉＣの生成、カーボン化による強
度の向上が期待できるものであり、その添加量は５〜２
５重量％、好ましくは８〜２２重量％の範囲内である。
ここで、該添加量が５重量％未満では閉塞材の強度が不
足するために好ましくなく、また、２５重量％を超えて
添加しても、それに見合う強度向上効果は得られない。Next, examples of the carbonaceous raw material used in the powder portion of the blast furnace taphole plugging material of the present invention include graphite, coke, coal powder, carbon black, various pitch powders, and various resin powders. Can be. This carbonaceous material is
It is expected that the formation of SiC by reaction with Si and the improvement of strength by carbonization can be expected.
It is in the range of 5% by weight, preferably 8 to 22% by weight.
Here, if the addition amount is less than 5% by weight, the strength of the occluding material will be insufficient, and if it is added in excess of 25% by weight, the corresponding strength improving effect cannot be obtained.
【００１９】次に、本発明の高炉出銑口閉塞材の粉末部
に使用される粘土原料としては、可塑性のある粘土を使
用することが好ましく、例えば木節粘土、ボールクレー
等を挙げることができる。粘土原料の添加量は５〜１５
重量％、好ましくは７〜１３重量％の範囲内である。該
添加量が５重量％未満であると、可塑性が乏しく、満足
できる押出充填性が得られなくなるために好ましくな
く、また、１５重量％を超えると耐食性の低下を引き起
こすために好ましくない。Next, as the clay raw material used for the powder portion of the blast furnace taphole plugging material of the present invention, it is preferable to use plastic clay, such as Kibushi clay and ball clay. it can. Addition amount of clay raw material is 5-15
%, Preferably in the range of 7 to 13% by weight. If the amount is less than 5% by weight, the plasticity is poor and satisfactory extrusion filling properties cannot be obtained, and if it exceeds 15% by weight, the corrosion resistance is undesirably reduced.
【００２０】次に、本発明の高炉出銑口閉塞材の粉末部
に使用可能な他の耐火原料としては、例えばアルミナ、
ムライト、スピネル、ジルコン、ジルコニア、ロー石、
マグネシア等の酸化物原料を挙げることができる。これ
らの耐火原料の添加量は、上記窒化珪素系原料、炭素質
原料並びに粘土原料の添加量に応じて１５〜７０重量％
の範囲で使用することができる。Next, other refractory raw materials that can be used for the powder portion of the blast furnace taphole plugging material of the present invention include, for example, alumina,
Mullite, spinel, zircon, zirconia, raw stone,
Examples thereof include oxide raw materials such as magnesia. The amount of these refractory raw materials added is 15 to 70% by weight, depending on the amounts of the above silicon nitride-based raw materials, carbonaceous raw materials and clay raw materials added.
Can be used in the range.
【００２１】本発明の高炉出銑口閉塞材は、上記のよう
な配合割合を有する粉末部１００重量部に対して外掛で
１０〜２５重量部、好ましくは１３〜２２重量部の炭素
含有結合材を含有してなるものである。ここで、炭素含
有結合材としては、例えば石油または石炭系タール、ノ
ボラック型フェノール樹脂単味またはこれらの混合物を
使用することができる。炭素含有結合材の添加量が１０
重量部未満であると良好な押出充填性を得ることができ
ないために好ましくなく、また、２５重量部を超えると
結合材に含まれる揮発分が増加して加熱後の充填性が低
下するために好ましくない。The blast furnace tap hole plugging material of the present invention has a carbon-containing binder in an amount of 10 to 25 parts by weight, preferably 13 to 22 parts by weight, based on 100 parts by weight of the powder having the above mixing ratio. Is contained. Here, as the carbon-containing binder, for example, petroleum or coal-based tar, novolac type phenol resin plain or a mixture thereof can be used. The amount of the carbon-containing binder added is 10
When the amount is less than 25 parts by weight, it is not preferable because good extrusion filling property cannot be obtained, and when the amount exceeds 25 parts by weight, the volatile matter contained in the binder increases and the filling property after heating decreases. Not preferred.
【００２２】本発明の高炉出銑口閉塞材は、上記原料の
構成に特徴を有するものであり、閉塞材の調製や施工方
法は特に限定されるものではなく、慣用の任意の方法を
用いることができる。The blast furnace taphole plugging material of the present invention is characterized by the composition of the above-mentioned raw materials, and the method of preparing and applying the plugging material is not particularly limited, and any conventional method can be used. Can be.
【００２３】[0023]
【実施例】以下に実施例及び比較例を挙げて本発明の高
炉出銑口閉塞材を更に説明する。 実施例 以下の表１に、本発明品及び比較品の配合割合と、得ら
れた閉塞材の耐スラグ性について示す。The blast furnace taphole plug material of the present invention will be further described below with reference to examples and comparative examples. Examples Table 1 below shows the mixing ratio of the product of the present invention and the comparative product, and the slag resistance of the obtained plugging material.
【００２４】[0024]
【表１】 [Table 1]
【００２５】表１中、窒化珪素鉄(Ｆｅ：１４％)の粒径
は０.３ｍｍ以下で、且つ７５μｍ以下が８７％であ
り、窒化珪素鉄(Ｆｅ：７％)の粒径は０.３ｍｍ以下
で、且つ７５μｍ以下が８５％であり、窒化珪素の粒径
は０.３ｍｍ以下で、且つ７５μｍ以下が８９％であ
る。In Table 1, the particle size of silicon iron nitride (Fe: 14%) is 0.3 mm or less, and the particle size of 75 μm or less is 87%. The particle size of silicon iron nitride (Fe: 7%) is 0.3%. 85% is 3 mm or less and 75 μm or less, and the particle size of silicon nitride is 0.3 mm or less and 75% or less is 89%.
【００２６】また、溶損指数は、回転ドラム侵食試験で
高炉スラグを用い還元雰囲気で１５００〜１５５０℃で
４時間試験後の平均侵食量を測定し、比較品１を１００
とした指数で示すものである。The erosion index was determined by measuring the average amount of erosion after a 4-hour test at 1500 to 1550 ° C. in a reducing atmosphere using a blast furnace slag in a rotary drum erosion test.
It is indicated by an index.
【００２７】表１の結果から明らかなように、本発明品
はいずれも比較品の窒化珪素鉄あるいは窒化珪素のみを
使用したものに比べ溶損が少なく、耐食性に優れている
ことが判る。As is evident from the results in Table 1, all of the products of the present invention have less erosion and are excellent in corrosion resistance as compared with the comparative products using only silicon iron nitride or silicon nitride.
【００２８】参考例 次に、本発明品２をＡ製鉄所の高炉出銑口に使用したと
ころ、出銑中の出銑口拡大が少なく、比較品２に比べ
１.５倍出銑時間を延長することができ、耐食性に優れ
ていることが確認された。REFERENCE EXAMPLE Next, when the product 2 of the present invention was used for a blast furnace taphole of the A steel mill, the taphole expansion during tapping was small, and the tapping time was 1.5 times longer than that of the comparative product 2. It was confirmed that it could be extended and was excellent in corrosion resistance.
【００２９】[0029]
【発明の効果】本発明の高炉出銑口閉塞材によれば、耐
スラグ性に優れた出銑時間を大幅に延長することができ
る高耐用性の高炉出銑口閉塞材を提供することができ
る。According to the blast furnace taphole plugging material of the present invention, a highly durable blast furnace taphole plugging material which is excellent in slag resistance and can greatly extend tapping time can be provided. it can.
Claims (2)
鉄２０〜４５重量％、炭素質原料５〜２５重量％、粘土
５〜１５重量％及び他の耐火原料１５〜７０重量％より
なる粉末部１００重量部に、外掛で１０〜２５重量部の
炭素含有結合材を含有してなることを特徴とする高炉出
銑口閉塞材。1. A powder part comprising 20 to 45% by weight of silicon iron nitride or silicon nitride and silicon iron nitride, 5 to 25% by weight of a carbonaceous raw material, 5 to 15% by weight of clay, and 15 to 70% by weight of another refractory raw material. A blast furnace taphole closing material, characterized in that 10 to 25 parts by weight of a carbon-containing binder is externally added to 100 parts by weight.
量％の範囲内にある請求項１記載の高炉出銑口閉塞材。2. The blast furnace taphole closing material according to claim 1, wherein the Fe content in the powder portion is in the range of 1.4 to 3.0% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7293008A JP2831311B2 (en) | 1995-11-10 | 1995-11-10 | Blast furnace taphole plugging material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7293008A JP2831311B2 (en) | 1995-11-10 | 1995-11-10 | Blast furnace taphole plugging material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09132471A true JPH09132471A (en) | 1997-05-20 |
| JP2831311B2 JP2831311B2 (en) | 1998-12-02 |
Family
ID=17789290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7293008A Expired - Fee Related JP2831311B2 (en) | 1995-11-10 | 1995-11-10 | Blast furnace taphole plugging material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2831311B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000035829A1 (en) * | 1998-12-15 | 2000-06-22 | Nippon Crucible Co., Ltd. | Tap hole blocking material for metal melting apparatus |
| JP2009190946A (en) * | 2008-02-15 | 2009-08-27 | Kurosaki Harima Corp | Mud material |
| US8163666B2 (en) | 2006-10-20 | 2012-04-24 | Krosakiharima Corporation | Taphole mix |
| JP2019167287A (en) * | 2018-03-22 | 2019-10-03 | 黒崎播磨株式会社 | Mud material |
| JPWO2020158806A1 (en) * | 2019-01-30 | 2021-11-25 | 京セラ株式会社 | Heat resistant material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5411116A (en) * | 1977-06-28 | 1979-01-27 | Nippon Steel Corp | Method of making mud for blast furnace |
| JPH0782046A (en) * | 1993-09-14 | 1995-03-28 | Nippon Steel Corp | Mud for tapping hole of blast furnace |
-
1995
- 1995-11-10 JP JP7293008A patent/JP2831311B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5411116A (en) * | 1977-06-28 | 1979-01-27 | Nippon Steel Corp | Method of making mud for blast furnace |
| JPH0782046A (en) * | 1993-09-14 | 1995-03-28 | Nippon Steel Corp | Mud for tapping hole of blast furnace |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000035829A1 (en) * | 1998-12-15 | 2000-06-22 | Nippon Crucible Co., Ltd. | Tap hole blocking material for metal melting apparatus |
| US6281266B1 (en) | 1998-12-15 | 2001-08-28 | Nippon Crucible Co., Ltd. | Tap hole blocking material for metal melting apparatus |
| US8163666B2 (en) | 2006-10-20 | 2012-04-24 | Krosakiharima Corporation | Taphole mix |
| JP2009190946A (en) * | 2008-02-15 | 2009-08-27 | Kurosaki Harima Corp | Mud material |
| JP2019167287A (en) * | 2018-03-22 | 2019-10-03 | 黒崎播磨株式会社 | Mud material |
| JPWO2020158806A1 (en) * | 2019-01-30 | 2021-11-25 | 京セラ株式会社 | Heat resistant material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2831311B2 (en) | 1998-12-02 |
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