JP2592224B2 - Closure material for molten metal tap hole - Google Patents
Closure material for molten metal tap holeInfo
- Publication number
- JP2592224B2 JP2592224B2 JP6184340A JP18434094A JP2592224B2 JP 2592224 B2 JP2592224 B2 JP 2592224B2 JP 6184340 A JP6184340 A JP 6184340A JP 18434094 A JP18434094 A JP 18434094A JP 2592224 B2 JP2592224 B2 JP 2592224B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- molten metal
- coal
- pitch
- caking coal
- 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.)
- Expired - Fee Related
Links
- 239000000463 material Substances 0.000 title claims description 18
- 229910052751 metal Inorganic materials 0.000 title claims description 15
- 239000002184 metal Substances 0.000 title claims description 15
- 239000003245 coal Substances 0.000 claims description 21
- 239000011280 coal tar Substances 0.000 claims description 16
- 239000011230 binding agent Substances 0.000 claims description 8
- 239000011819 refractory material Substances 0.000 claims description 8
- 239000003610 charcoal Substances 0.000 claims 1
- 238000010079 rubber tapping Methods 0.000 description 16
- 230000007797 corrosion Effects 0.000 description 13
- 238000005260 corrosion Methods 0.000 description 13
- 239000011295 pitch Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000004927 clay Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- WHRZCXAVMTUTDD-UHFFFAOYSA-N 1h-furo[2,3-d]pyrimidin-2-one Chemical compound N1C(=O)N=C2OC=CC2=C1 WHRZCXAVMTUTDD-UHFFFAOYSA-N 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000006173 Larrea tridentata Nutrition 0.000 description 2
- 244000073231 Larrea tridentata Species 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229960002126 creosote Drugs 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000011269 tar Substances 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical group C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010427 ball clay Substances 0.000 description 1
- -1 carbonaceous (C) Chemical compound 0.000 description 1
- 239000011335 coal coke Substances 0.000 description 1
- 239000011300 coal pitch Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000011301 petroleum pitch Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011312 pitch solution Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、特に高炉出湯口用閉塞
材、電気炉出湯口用閉塞材などの、還元雰囲気下で使用
される溶融金属出湯口用閉塞材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug for a molten metal tap used in a reducing atmosphere, such as a plug for a blast furnace tap and an outlet for an electric furnace.
【０００２】[0002]
【従来の技術】従来、溶融金属出湯口用閉塞材は、ロー
石、シャモット、アルミナの１種または２種以上を主原
料とし、炭化珪素（ＳｉＣ）、炭素質（Ｃ）、窒化珪素
（Ｓｉ3 Ｎ4 ）等及び粘土を添加し、更にコールタール
をバインダーとして添加し、混練されたＡｌ2 Ｏ3 −Ｓ
ｉＯ2 −ＳｉＣ−Ｃ系、またはＡｌ2 Ｏ3 −ＳｉＯ2 −
ＳｉＣ−Ｓｉ3 Ｎ4 −Ｃ系の材料が使用されてきた。2. Description of the Related Art Conventionally, a plugging material for a molten metal tap hole is mainly made of one or more of rock stone, chamotte, and alumina, and is made of silicon carbide (SiC), carbonaceous (C), silicon nitride (Si). 3 N 4) or the like and added clay, further addition of coal tar as a binder, kneaded Al 2 O 3 -S
iO 2 -SiC-C-based or Al 2 O 3 -SiO 2 -
SiC-Si 3 N 4 -C based material has been used.
【０００３】しかしながら、長時間出銑を達成するため
には、上記のごとき従来の閉塞材は耐蝕性が不充分であ
り、そのため特公昭５６−３９２号公報ではアルミニウ
ム粉末を添加したり、特公昭５５−３５３５６号公報で
は耐蝕性向上材を添加したり、更に特開平１−１０８１
７０号公報ではＭｇＯ−Ａｌ2 Ｏ3 スピネル等の耐火材
料を添加することが開示されているが、これらの原料は
一般的に高価であり、経済性に問題がある。However, in order to achieve long-term tapping, the conventional plugging material as described above has insufficient corrosion resistance. For this reason, Japanese Patent Publication No. 56-392 discloses the addition of aluminum powder, In Japanese Patent Application Laid-Open No. 55-35356, a corrosion resistance improving material is added.
No. 70 discloses that a refractory material such as MgO—Al 2 O 3 spinel is added, but these materials are generally expensive and have a problem in economy.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、溶融金属出
湯口用閉塞材として、高価な耐火原料を使用することな
く、従来の溶融金属出湯口用閉塞材における材料系にお
いて、耐蝕性を向上し、かつ長時間出銑を達成すること
ができる溶融金属出湯口用閉塞材の提供を課題とする。DISCLOSURE OF THE INVENTION The present invention improves the corrosion resistance of a conventional material for a molten metal tapping plug without using an expensive refractory raw material as the plugging material for a molten metal tapping port. It is another object of the present invention to provide a closing material for a molten metal tapping port which can achieve tapping for a long time.
【０００５】[0005]
【課題を解決するための手段】本発明の溶融金属出湯口
用閉塞材は、耐火材料に対して、バインダーを９．５重
量％〜４４重量％の割合で添加すると共に、該バインダ
ーが、コールタール及び／又はカットバックピッチと膨
張性粘結炭または弱粘結炭とからなり、該膨張性粘結炭
または弱粘結炭が前記コールタール及び／又はカットバ
ックピッチに対して４重量％〜４５重量％とからなるこ
とを特徴とする。In the plugging material for a molten metal tap hole of the present invention, a binder is added to the refractory material in a ratio of 9.5% by weight to 44% by weight, and the binder comprises A tar and / or cutback pitch and an expandable or weakly caking coal, wherein the expandable or weakly caking coal is 4% by weight based on the coal tar and / or cutback pitch. 45% by weight.
【０００６】本発明における耐火材料は、その主原料と
してロー石、シャモット、アルミナの１種または２種以
上を使用されるが、その粒度は６ｍｍ以下のものであ
る。The refractory material of the present invention uses one or more of rock stone, chamotte, and alumina as its main raw material, and has a particle size of 6 mm or less.
【０００７】また、これら主原料には、炭化珪素、窒化
珪素、炭素質粉末、粘土等が添加される。Further, silicon carbide, silicon nitride, carbonaceous powder, clay and the like are added to these main raw materials.
【０００８】炭化珪素は、耐蝕性防止を目的として添加
され、耐火材料中１０重量％〜５０重量％、好ましくは
１５重量％〜３５重量％の割合とするとよい。１０重量
％未満であると耐蝕性向上効果が少なく、５０重量％を
越えると価格が高くなりすぎて、価格に見合った耐蝕性
向上効果が期待できず、また、充分な焼結強度が得られ
ないため好ましくない。[0008] Silicon carbide is added for the purpose of preventing corrosion resistance, and it is preferable that the content of the silicon carbide is 10 to 50% by weight, preferably 15 to 35% by weight in the refractory material. If it is less than 10% by weight, the effect of improving the corrosion resistance is small, and if it exceeds 50% by weight, the price becomes too high, so that the effect of improving the corrosion resistance cannot be expected in proportion to the price, and sufficient sintering strength is obtained. Not preferred
【０００９】窒化珪素も耐蝕性防止を目的として添加さ
れ、耐火材料中８重量％〜４０重量％、好ましくは１５
重量％〜３０重量％の割合とするとよい。８重量％未満
であると耐蝕性向上効果が少なく、４０重量％を越える
と価格に見合った耐蝕性向上効果が得られず、好ましく
ない。Silicon nitride is also added for the purpose of preventing corrosion resistance, and is contained in the refractory material in an amount of 8 to 40% by weight, preferably 15% by weight.
The ratio is preferably in the range of 30% by weight to 30% by weight. If the amount is less than 8% by weight, the effect of improving the corrosion resistance is small.
【００１０】炭素粉末としては、黒鉛、石炭コークス、
石油コークス等が挙げられるが、スラグ浸透及び過焼結
抑制を目的として添加され、耐火材料中６重量％〜２０
重量％の割合とするとよい。６重量％未満であると耐ス
ラグ浸透性が低下すると共に、過焼結となり、開口難に
なりやすく好ましくなく、また、２０重量％を越えると
強度が著しく低下すると共に、緻密な組織が得られにく
くなり、好ましくない。As the carbon powder, graphite, coal coke,
Petroleum coke and the like are added, and are added for the purpose of suppressing slag infiltration and oversintering.
It may be a percentage by weight. If it is less than 6% by weight, the slag penetration resistance is reduced, and oversintering tends to be difficult to open, which is not preferable. If it exceeds 20% by weight, the strength is significantly reduced and a dense structure is obtained. It becomes difficult and is not preferred.
【００１１】粘土としては、木節粘土、蛙目粘土、ボー
ルクレー等が挙げられるが、充填作業性に必要な保形
性、滑り性を付与するために添加され、耐火材料中５重
量％〜２０重量％の割合とするとよい。５重量％未満で
あると充填作業性が悪化し、２０重量％を越えると耐蝕
性が著しく低下するため、好ましくない。Examples of the clay include Kibushi clay, Frog-eye clay, ball clay and the like. The clay is added in order to impart shape retention and slipperiness required for filling workability. The ratio may be 20% by weight. If it is less than 5% by weight, the filling workability deteriorates, and if it exceeds 20% by weight, the corrosion resistance is remarkably reduced, which is not preferable.
【００１２】本発明の特徴をなすバインダーは、コール
タール及び／又はカットバックピッチと膨張性粘結炭ま
たは弱粘結炭とからなる。The binder which characterizes the present invention comprises coal tar and / or cutback pitch and expandable or weakly caking coal.
【００１３】コールタールは無水タールが好ましく、ま
たカットバックピッチは固形ピッチをクレオソート等で
溶液化したもので、コールタール同様に使用され、固形
ピッチとしては、石炭ピッチ、石油ピッチ等が挙げられ
る。The coal tar is preferably an anhydrous tar, and the cutback pitch is a solution obtained by forming a solid pitch into a solution by creosote, etc., and is used in the same manner as the coal tar. Examples of the solid pitch include coal pitch and petroleum pitch. .
【００１４】また、膨張性粘結炭または弱粘結炭とは、
コールタール及び／又はカットバックピッチと１００℃
以上で反応して増粘現象を示す歴青物質である。[0014] The intumescent or weak caking coal is
Coal tar and / or cutback pitch and 100 ° C
It is a bituminous substance which reacts as described above and shows a thickening phenomenon.
【００１５】膨張性粘結炭または弱粘結炭は、コールタ
ール及び／又はカットバックピッチに対して４重量％〜
４５重量％、好ましくは１０重量％〜３５重量％の割合
である。膨張性粘結炭または弱粘結炭が４重量％より少
ないと耐蝕性向上効果が少なく、また、４５重量％を越
えると材料の粘性が高くなりすぎて、充填作業性が悪化
するので好ましくない。The expansive or weakly caking coal is used in an amount of 4% by weight or less based on the coal tar and / or the cutback pitch.
The proportion is 45% by weight, preferably 10% to 35% by weight. If the amount of expandable caking coal or weak caking coal is less than 4% by weight, the effect of improving corrosion resistance is small, and if it exceeds 45% by weight, the viscosity of the material becomes too high and the filling workability deteriorates, which is not preferable. .
【００１６】また、耐火材料に対するバインダー量は充
填作業性とマットガン能力に基づいて調整されるが、
９．５重量％〜４４重量％でその効果は充分である。The amount of the binder for the refractory material is adjusted based on the filling workability and the mat gun ability.
The effect is sufficient at 9.5% by weight to 44% by weight.
【００１７】膨張性粘結炭または弱粘結炭とコールター
ル及び／又はカットバックピッチとの反応性について説
明する。無水コールタール２号８０重量部と膨張性粘結
炭２０重量部とを混合した後、下表に示す温度及び反応
時間に保持し、下表に示す粘度測定温度で粘度を測定し
た。測定結果を同時に下表に示す。The reactivity of the expansive or weakly caking coal with coal tar and / or cutback pitch will be described. After mixing 80 parts by weight of anhydrous coal tar No. 2 and 20 parts by weight of expansive caking coal, the mixture was kept at the temperature and reaction time shown in the table below, and the viscosity was measured at the viscosity measurement temperature shown in the table below. The measurement results are shown in the table below.
【００１８】[0018]
【表１】 [Table 1]
【００１９】なお、無水コールタール２号８０重量部と
膨張性粘結炭２０重量部との混合物は、６０℃での状態
での粘度は８８０ｃｐｓであり、その温度で約２週間保
持しても粘度に変化はないものである。A mixture of 80 parts by weight of anhydrous coal tar No. 2 and 20 parts by weight of expandable caking coal has a viscosity at 60 ° C. of 880 cps, and is maintained at that temperature for about 2 weeks. There is no change in viscosity.
【００２０】また、無水コールタール２号単独では、６
０℃での粘度は３４０ｃｐｓてあるが、１００℃での粘
度は４０ｃｐｓ、１５０℃では１０ｃｐｓと急激に粘度
が低下する。Further, in the case of anhydrous coal tar 2 alone, 6
Although the viscosity at 0 ° C. is 340 cps, the viscosity at 100 ° C. decreases rapidly to 40 cps, and at 150 ° C. to 10 cps.
【００２１】[0021]
【作用】本発明の溶融金属出湯口用閉塞材は、従来の耐
火材料に、バインダーとしてコールタール及び／又はカ
ットバックピッチと膨張性粘結炭または弱粘結炭とを添
加するものであり、コールタール及び／又はカットバッ
クピッチは使用時での高温でも粘性の低下が抑制され、
分離することなく閉塞材中に残留させることができ、そ
の結果、コールタール及び／又はカットバックピッチか
らの残留カーボン量を増加させることができる。その結
果、閉塞材が緻密化され、組織内に均一に分布したカー
ボン量を増加させることができるので、耐蝕性を大幅に
向上させることができ、長時間出銑を可能とするもので
ある。The closing material for a molten metal tap hole of the present invention is obtained by adding coal tar and / or cutback pitch and expandable caking coal or weak caking coal as a binder to a conventional refractory material. Coal tar and / or cutback pitch suppresses the decrease in viscosity even at high temperatures during use,
It can be left in the plugging material without separation, and as a result, the amount of residual carbon from coal tar and / or cutback pitch can be increased. As a result, the plugging material is densified, and the amount of carbon uniformly distributed in the structure can be increased, so that the corrosion resistance can be significantly improved and tapping can be performed for a long time.
【００２２】以下、実施例により、本発明を詳細に説明
する。Hereinafter, the present invention will be described in detail with reference to examples.
【００２３】[0023]
【００２４】[0024]
【表２】 [Table 2]
【００２５】（実施例１）表２における配合１００重量
部に、膨張性粘結炭（０．３ｍｍ以下）を１重量部添加
し、５０℃のミキサーで混練して本発明品を得た。Example 1 1 part by weight of expandable caking coal (0.3 mm or less) was added to 100 parts by weight of the composition shown in Table 2, and kneaded with a mixer at 50 ° C. to obtain a product of the present invention.
【００２６】（実施例２）実施例１において、膨張性粘
結炭（０．３ｍｍ以下）の添加量を４重量部とした以外
は同様にして本発明品を得た。Example 2 A product of the present invention was obtained in the same manner as in Example 1 except that the amount of the expandable caking coal (0.3 mm or less) was changed to 4 parts by weight.
【００２７】（実施例３）実施例１において、膨張性粘
結炭（０．３ｍｍ以下）の添加量を６重量部とした以外
は同様にして本発明品を得た。Example 3 A product of the present invention was obtained in the same manner as in Example 1 except that the amount of the expandable caking coal (0.3 mm or less) was changed to 6 parts by weight.
【００２８】（比較例１）膨張性粘結炭（０．３ｍｍ以
下）を添加しない表２における配合を、比較品とした。(Comparative Example 1) The formulation in Table 2 to which no expansive caking coal (0.3 mm or less) was added was used as a comparative product.
【００２９】[0029]
【表３】 [Table 3]
【００３０】1) ピッチをクレオソートで溶液化した
もの （実施例４）表３における配合１００重量部に、弱粘結
炭（０．３ｍｍ以下）を３重量部添加し、５０℃のミキ
サーで混練して本発明品を得た。 1) Pitch solution prepared by creosote (Example 4) To 100 parts by weight of the blend in Table 3, 3 parts by weight of weakly caking coal (0.3 mm or less) was added, and the mixture was mixed with a mixer at 50 ° C. The product of the present invention was obtained by kneading.
【００３１】（実施例５）実施例４において、弱粘結炭
（０．３ｍｍ以下）の添加量を５重量部とした以外は同
様にして本発明品を得た。Example 5 A product of the present invention was obtained in the same manner as in Example 4, except that the amount of the weakly caking coal (0.3 mm or less) was changed to 5 parts by weight.
【００３２】（比較例２）弱粘結炭（０．３ｍｍ以下）
を添加しない表３における配合を比較品とした。(Comparative Example 2) Weak caking coal (0.3 mm or less)
The composition in Table 3 without addition of was used as a comparative product.
【００３３】実施例１〜５、比較例１〜２で得られた溶
融金属出湯口用閉塞材についての諸性質を、表４、表５
に示す。Tables 4 and 5 show various properties of the molten metal tapping plugs obtained in Examples 1 to 5 and Comparative Examples 1 and 2.
Shown in
【００３４】[0034]
【表４】 [Table 4]
【００３５】[0035]
【表５】 [Table 5]
【００３６】尚、還元焼成１３５０℃−３ｈｒｓの諸物
性測定に用いた供試体は、形状は直径５０mmで高さ５０
mmの円柱体であり、成形圧力５０ Kg/cm2 で作成したも
のである。The specimen used for the measurement of various physical properties at the reduced firing temperature of 1350 ° C. for 3 hours had a diameter of 50 mm and a height of 50 mm.
It is a cylindrical body of mm and was produced at a molding pressure of 50 Kg / cm 2 .
【００３７】また、耐スラグ侵食テストは、回転アーク
炉侵食試験機（金枠直径５００mm×長さ５００mmの円筒
で両端は鉄製蓋で密閉したした模型回転式）を用い、試
料は予め形状６０×６５×２００mmに成形圧力５０ Kg/
cm2 で成形し、還元６００℃／５Ｈで処理したものを供
試体として、上述の回転アーク炉侵食試験機内に実施例
１〜実施例５、比較例１〜２で得た溶融金属出湯口用閉
塞材を同時に内張りし、試験条件（温度１５５０℃／５
Ｈ、回転数４回／分、高炉スラグ２ Kg ／回で５回入
替）で行い、比較例１で得られた溶融金属出湯口用閉塞
材の侵食寸法を１００とした場合の指数で表した。The slag erosion resistance test was performed by using a rotary arc furnace erosion tester (a model rotary type having a cylinder having a diameter of 500 mm and a length of 500 mm and sealed at both ends with iron lids). Molding pressure 50 kg / 65 x 200 mm
For the molten metal tapping port obtained in Examples 1 to 5 and Comparative Examples 1 and 2 in a rotary arc furnace erosion tester as described above, a test piece molded in cm 2 and treated at a reduction of 600 ° C./5H was used. At the same time, the occluding material was lined, and the test conditions (temperature 1550 ° C / 5
H, rotation speed 4 times / min, blast furnace slag 2 Kg / time, 5 changes) and the erosion dimension of the molten metal tapping plug obtained in Comparative Example 1 was 100, which was expressed as an index. .
【００３８】表４、表５からわかるように、本発明品
は、従来品に比して、耐蝕性が大幅に向上することがわ
かる。As can be seen from Tables 4 and 5, the product of the present invention has significantly improved corrosion resistance as compared with the conventional product.
【００３９】また、実施例２で得た溶融金属出湯口用閉
塞材について、実用試験を容積４８００ｍ3 の大型高炉
で実施したところ、比較例１で得た溶融金属出湯口用閉
塞材と比較して、出銑時間が１．３倍に延長できた。A practical test was conducted on the molten metal tapping plug obtained in Example 2 in a large blast furnace having a capacity of 4800 m 3 , and compared with the molten metal tapping plug obtained in Comparative Example 1. As a result, the tapping time was extended 1.3 times.
【００４０】[0040]
【発明の効果】本発明の溶融金属出湯口用閉塞材は、耐
蝕性が向上することにより出銑時間を長時間とでき、高
炉出銑口用、電気炉出湯口用等の閉塞材として有用であ
る。Advantageous Effects of the Invention The molten metal tapping material of the present invention can be used as a plugging material for a blast furnace tapping hole, an electric furnace tapping hole, and the like, because of its improved corrosion resistance, the tapping time can be extended. It is.
Claims (1)
重量％〜４４重量％の割合で添加すると共に、該バイン
ダーが、コールタール及び／又はカットバックピッチと
膨張性粘結炭または弱粘結炭とからなり、該膨張性粘結
炭または弱粘結炭が前記コールタール及び／又はカット
バックピッチに対して４重量％〜４５重量％とからなる
ことを特徴とする溶融金属出湯口用閉塞材。1. A binder for a refractory material of 9.5.
% To 44% by weight, and the binder comprises coal tar and / or cutback pitch and expandable or weakly caking coal, and the expandable or weakly caking coal is used. A closing material for a molten metal tap hole, wherein charcoal comprises 4% by weight to 45% by weight based on the coal tar and / or cutback pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6184340A JP2592224B2 (en) | 1994-08-05 | 1994-08-05 | Closure material for molten metal tap hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6184340A JP2592224B2 (en) | 1994-08-05 | 1994-08-05 | Closure material for molten metal tap hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0848575A JPH0848575A (en) | 1996-02-20 |
| JP2592224B2 true JP2592224B2 (en) | 1997-03-19 |
Family
ID=16151590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6184340A Expired - Fee Related JP2592224B2 (en) | 1994-08-05 | 1994-08-05 | Closure material for molten metal tap hole |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2592224B2 (en) |
-
1994
- 1994-08-05 JP JP6184340A patent/JP2592224B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0848575A (en) | 1996-02-20 |
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