JP2787950B2 - Mud material for blast furnace taphole - Google Patents
Mud material for blast furnace tapholeInfo
- Publication number
- JP2787950B2 JP2787950B2 JP1108257A JP10825789A JP2787950B2 JP 2787950 B2 JP2787950 B2 JP 2787950B2 JP 1108257 A JP1108257 A JP 1108257A JP 10825789 A JP10825789 A JP 10825789A JP 2787950 B2 JP2787950 B2 JP 2787950B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- particle size
- tapping
- less
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 title claims description 21
- 239000002245 particle Substances 0.000 claims description 27
- 239000004927 clay Substances 0.000 claims description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- 239000005995 Aluminium silicate Substances 0.000 claims description 9
- 235000012211 aluminium silicate Nutrition 0.000 claims description 9
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- 239000010439 graphite Substances 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 229910001337 iron nitride Inorganic materials 0.000 claims description 6
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 6
- 239000011819 refractory material Substances 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- -1 carbon organic compound Chemical class 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 17
- 238000005260 corrosion Methods 0.000 description 15
- 230000007797 corrosion Effects 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 239000002893 slag Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 229910001570 bauxite Inorganic materials 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 7
- 229910010271 silicon carbide Inorganic materials 0.000 description 7
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- 239000000571 coke Substances 0.000 description 5
- 238000013003 hot bending Methods 0.000 description 5
- 238000005245 sintering Methods 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 239000000843 powder Substances 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
- 239000000126 substance Substances 0.000 description 3
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- 229910005347 FeSi Inorganic materials 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 239000011271 tar pitch Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は高炉における出銑孔用マッド材に関するも
のである。Description: TECHNICAL FIELD The present invention relates to a tapping mud material for a blast furnace.
最近の鉄鋼業界では、少基数の大型高炉への集約がな
され、出銑比〔１日の出銑量（ｔ−pigiron）／炉内容
積（m3）〕を高める努力が続けられており、出銑比2.0
以上の高炉が増えている。Recent steel industry, aggregates of large-sized blast furnace a small radix is made, has been continuing efforts to increase the Dezukuhi [1 sunrise pig iron amount (t-pigiron) / furnace volume (m 3)], tapping Ratio 2.0
The above blast furnaces are increasing.
この出銑比を高めるため、送風量を増加させることに
より出銑滓の流出速度が大きくなり、出銑孔用マッド材
の損傷が大きく出銑時間の低下をきたす。また、高出銑
比操業では開孔径が小さいと出銑初期に造銑滓速度より
出銑滓速度が小さすぎて、炉内の貯銑滓レベルが高くな
り、炉内圧の変動等を生じ、操業に悪影響を及ぼす。従
って、開孔部を大きくする必要があるが、開孔径を大き
くすると出銑時間の低下をきたす。In order to increase the tapping ratio, the flow rate of tapping slag is increased by increasing the amount of blown air, so that the mud material for tapholes is greatly damaged and the tapping time is reduced. In addition, in the high tapping ratio operation, if the opening diameter is small, the tapping speed is too low in the early stage of tapping than the tapping speed, and the level of the tapping residue in the furnace increases, causing fluctuations in the furnace pressure, etc. Affects operations. Therefore, it is necessary to increase the hole diameter, but if the hole diameter is increased, the tapping time is reduced.
高炉出銑孔用マッド材としてはろう石、シャモット、
アルミナ、炭化珪素、カーボン等の耐火骨材、耐火粘
土、金属珪素等の焼結剤並びにタール等のバインダーか
らなるものが使用されている。As mad materials for blast furnace tapholes, there are limestone, chamotte,
A material made of a refractory aggregate such as alumina, silicon carbide and carbon, a refractory clay, a sintering agent such as metal silicon and a binder such as tar is used.
〔発明が解決しようとする課題〕 上記、炭化珪素、カーボンは耐食性、耐摩耗性を増大
させるためにかなりの量が添加されるが、これ等物質は
自己焼結性がないため、添加量の増加に伴って強度が低
下する。そこで、このような強度の低下を防止するため
に粘土が多量に添加されるのであるが、この粘土は高炉
スラグと反応し、低融物を生成する。従って、高出銑比
操業で出銑滓の流出量が多い場合、出銑中の孔径拡大が
急激に生じ、炉内に溶銑及び溶滓を残したまま出銑が終
了してしまい、出銑回数の増加、労働負荷の増大につな
がっていた。この問題を解決するために、従来は粘土量
の減少、アルミナ微粉、ジルコン微粉等を使用すること
が試みられてきた。[Problems to be Solved by the Invention] Above, silicon carbide and carbon are added in a considerable amount to increase corrosion resistance and abrasion resistance. The strength decreases with the increase. Therefore, in order to prevent such a decrease in strength, a large amount of clay is added. The clay reacts with the blast furnace slag to generate a low melt. Therefore, when tapping slag flows out at a high tapping rate operation, the hole diameter increases sharply during tapping, and the tapping ends with the hot metal and slag remaining in the furnace. This has led to an increase in the number of operations and the workload. In order to solve this problem, attempts have conventionally been made to reduce the amount of clay, use alumina fine powder, zircon fine powder, and the like.
しかしながら、アルミナやジルコン等では粘土程の焼
結性が得られず、実炉使用時に出銑初期の孔径拡大が大
きくなる欠点があった。However, alumina, zircon, and the like cannot obtain sintering properties comparable to those of clay, and there is a disadvantage that the diameter of the pores increases in the initial stage of tapping when used in an actual furnace.
この発明は上記従来の事情に鑑みて提案されたもので
あって、溶銑、溶滓に対して高い耐食性を有するととも
に、大きな強度を有し、高出銑比操業時において出銑孔
の急激な拡大現象がないマッド材を提供することを目的
とする。The present invention has been proposed in view of the above-described conventional circumstances, and has high corrosion resistance to hot metal and slag, has a large strength, and has a sharp tapping hole at a high tapping ratio operation. It is an object of the present invention to provide a mud material having no expansion phenomenon.
上記目的を達成するためにこの発明は、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、残部のその他の耐火材に、バインダーとして残炭
素有機化合物を加えて混練するようにしている。なお、
上記主原料として使用するアルミナ含有量80％以上のア
ルミナ原料と上記残部のその他の耐火材とを併せた重量
部は51〜79.5重量部とする。In order to achieve the above object, the present invention uses an alumina raw material having an alumina content of 80% or more as a main raw material,
0.5 to 4 parts by weight of graphite of 44 μm or less, 15 to 30 parts by weight of silicon iron nitride having a particle size of 44 μm or less, 5 to 15 parts by weight of kaolin clay, and the rest of other refractory materials. Is added and kneaded. In addition,
The total weight of the alumina raw material having an alumina content of 80% or more used as the main raw material and the remaining refractory material is 51 to 79.5 parts by weight.
この発明に使用される窒化珪素数は、フェロシリコン
を窒化したものであり、Si3N4を70〜80％含有し、残り
の大部分は金属Fe及びFeSiである。この中のSi3N4は共
有結合的性質を有し本来耐酸化性が高く、溶銑、溶融ス
ラグに対して濡れ難いという性質を有しているが、1400
℃以上の温度で徐々に分解して窒素を放出する性質があ
る。この窒素はカーボンの存在下でカオリン粘土と反応
し耐火物中に固定され、マッド材の緻密化及び耐食性が
向上すると推定される。Silicon nitride number to be used in the present invention is obtained by nitriding ferrosilicon, containing Si 3 N 4 70~80%, most remaining a metal Fe and FeSi. Among them, Si 3 N 4 has a covalent bond property and inherently has high oxidation resistance, and has a property that it is difficult to get wet with hot metal and molten slag.
It has the property of gradually decomposing at a temperature of ℃ or more and releasing nitrogen. It is presumed that this nitrogen reacts with kaolin clay in the presence of carbon and is fixed in the refractory, thereby improving the densification and corrosion resistance of the mud material.
すなわち、カオリン粘土はカーボンの存在下で下記第
（１）式に示すように窒素と反応しサイアロンを生じ
る。That is, kaolin clay reacts with nitrogen in the presence of carbon as shown in the following formula (1) to produce sialon.
上記反応により生じたサイアロンは溶銑、溶融スラグ
に濡れ難く、粘土の欠点である溶融スラグと反応して低
融点物質を生じる性質がなくなり、マッド材の耐食性が
大きく改善される。 The sialon produced by the above reaction is hardly wet by hot metal and molten slag, and does not react with molten slag, which is a drawback of clay, to produce a low-melting substance, so that the corrosion resistance of the mud material is greatly improved.
この窒化珪素鉄は44μｍ以下の微粉が粘土と反応しや
すく、添加量はマッド材中で15〜30重量部が適当であ
る。粒径が44μｍ以上では粘土との反応が乏しく、粘土
が未反応として残るので、耐食性が低下する。15重量部
以下では窒素の揮散が少なく、上記粘土と窒素の反応が
充分に生じ得ない。30重量部以上では反応焼結強度が高
くなりすぎて、開孔が困難となり不都合である。The fine powder of silicon nitride having a diameter of 44 μm or less easily reacts with the clay, and its addition amount is suitably 15 to 30 parts by weight in the mud material. When the particle size is 44 μm or more, the reaction with the clay is poor, and the clay remains unreacted, so that the corrosion resistance is reduced. If the amount is less than 15 parts by weight, the volatilization of nitrogen is small, and the reaction between the clay and nitrogen cannot sufficiently occur. If the amount is more than 30 parts by weight, the reaction sintering strength becomes too high, and it is difficult to form holes.
主骨材は、高炉スラグと反応して低融点物質を生成し
にくいAl2O3含有量80％以上のアルミナ原料が適当であ
る。Al2O3含有量が80％以下では耐食性が低下する。As the main aggregate, an alumina raw material having an Al 2 O 3 content of 80% or more, which is less likely to react with blast furnace slag to generate a low-melting substance, is suitable. If the Al 2 O 3 content is 80% or less, the corrosion resistance is reduced.
本発明では粒径44μｍ以下の黒鉛を使用する。黒鉛は
上記窒素と粘土の反応を促進するものである。その配合
割合は0.5〜４重量部が適当であり、0.5重量部以下では
窒素との反応が充分得られず、４重量部以上では焼結を
阻害して不都合である。黒鉛の粒径は44μｍ以下が好ま
しく、44μｍ以上では窒素と粘土の反応が乏しく、粘土
が未反応として残るので、耐食性が低下する。In the present invention, graphite having a particle size of 44 μm or less is used. Graphite promotes the reaction between nitrogen and clay. The compounding ratio is suitably 0.5 to 4 parts by weight. If it is less than 0.5 part by weight, a sufficient reaction with nitrogen cannot be obtained, and if it is more than 4 parts by weight, sintering is hindered, which is inconvenient. The particle size of graphite is preferably 44 μm or less, and if it is 44 μm or more, the reaction between nitrogen and clay is poor, and the clay remains unreacted, so that the corrosion resistance is reduced.
カオリン粘土は５重量部以下ではカーボン、窒素との
反応が不十分であり、15重量部を越えると未反応の粘土
が多くなりすぎて、マッド材の耐食性に悪影響を及ぼ
す。If the kaolin clay is less than 5 parts by weight, the reaction with carbon and nitrogen is insufficient, and if it exceeds 15 parts by weight, the amount of unreacted clay becomes too large, adversely affecting the corrosion resistance of the mud material.
この他、残部の耐火性物質として、炭化珪素、コーク
ス等の非酸化物原料、金属珪素、フェロシリコン、アル
ミニウム粉等の添加剤等を必要に応じて使用することが
できる。バインダーは残炭素有機化合物、例えば通常使
用されるタール、タールピッチ、フェノールレジンを使
用することができる。In addition, non-oxide raw materials such as silicon carbide and coke, and additives such as metal silicon, ferrosilicon, and aluminum powder can be used as necessary as the remaining refractory materials. As the binder, a residual carbon organic compound, for example, commonly used tar, tar pitch, or phenol resin can be used.
以上の構成及び作用により、この発明のマッド材は使
用温度付近での良好な耐食性及び充分な強度を発揮し、
しかも、出銑時に低融点物質を生成しないので、高出銑
比操業時の出銑孔の急激な拡大がなくなる。With the above configuration and action, the mud material of the present invention exhibits good corrosion resistance and sufficient strength near the operating temperature,
In addition, since low-melting-point substances are not generated at the time of tapping, rapid expansion of tapholes at the time of high tapping ratio operation is eliminated.
（実施例（ａ）） 以下、本発明の実施例を詳細に説明する。 (Example (a)) Hereinafter, examples of the present invention will be described in detail.
本発明の一実施例では、第１表実施例（ａ）欄に示す
ように、粒径３〜0.1mmの焼ボーキサイト（Al2O3含有量
88％）24重量部、粒径44μｍ以下の窒化珪素鉄17重量
部、粒径1mm以下の炭化珪素20重量部、粒径２〜0.1mmの
コークス10重量部、粒径44μｍ以下の黒鉛１重量部、カ
オリン粘土10重量部、タール19重量部を良く混合して高
炉出銑孔用マッド材を得た。In one embodiment of the present invention, as shown in column (a) of Example 1 in Table 1, calcined bauxite having a particle size of 3 to 0.1 mm (Al 2 O 3 content
88%) 24 parts by weight, 17 parts by weight of silicon iron nitride having a particle size of 44 μm or less, 20 parts by weight of silicon carbide having a particle size of 1 mm or less, 10 parts by weight of coke having a particle size of 2 to 0.1 mm, and 1 part by weight of graphite having a particle size of 44 μm or less Parts, 10 parts by weight of kaolin clay and 19 parts by weight of tar were mixed well to obtain a blast furnace taphole mud material.
（実施例（ｂ）） この高炉出銑孔用マッド材の1400℃における熱間曲げ
強さ及び1550℃における耐食性を試験した結果を第１表
実施例（ａ）欄に示す。(Example (b)) The results of testing the hot bending strength at 1400 ° C. and the corrosion resistance at 1550 ° C. of the mud material for the blast furnace taphole are shown in Example 1 (a) of Table 1.
また、本発明の他の実施例では、第１表実施例（ｂ）
欄に示すように、粒径３〜0.1mmの焼ボーキサイト（Al2
O3含有量88％以上）26重量部、粒径0.1mm〜の焼ボーキ
サイト11重量部、粒径1mm〜の炭化珪素20重量部、粒径
２〜0.1mmのコークス10重量部、粒径44μｍ以下の窒化
珪素鉄25重量部、粒径44μｍ以下の黒鉛３重量部、カオ
リン粘土５重量部、タール19重量部を良く混合して高炉
出銑孔用マッド材を得た。Also, in another embodiment of the present invention, Table 1 embodiment (b)
As shown in the column, calcined bauxite (Al 2
O 3 content 88% or more) 26 parts by weight, 11 parts by weight of calcined bauxite having a particle size of 0.1 mm or more, 20 parts by weight of silicon carbide having a particle size of 1 mm or more, 10 parts by weight of coke having a particle size of 2 to 0.1 mm, and a particle size of 44 μm 25 parts by weight of the following silicon iron nitride, 3 parts by weight of graphite having a particle size of 44 μm or less, 5 parts by weight of kaolin clay, and 19 parts by weight of tar were mixed well to obtain a blast furnace tapping mud material.
この高炉出銑孔用マッド材の1400℃における熱間曲げ
強さ及び1550℃における耐食性の試験した結果を第１表
実施例（ｂ）欄に示す。The results of tests on the hot bending strength at 1400 ° C. and the corrosion resistance at 1550 ° C. of the mud material for the blast furnace taphole are shown in Table 1 (b).
（比較例） 第１の比較例として、第１表比較例欄に示すように
粒径３〜0.1mmの焼ボーキサイト25重量部、粒径0.1mm以
下の焼ボーキサイト25重量部、粒径1mm以下の炭化珪素2
0重量部、粒径２〜0.1mmのコークス10重量部、粒径44μ
ｍ以下の窒化珪素鉄10重量部、カオリン粘土10重量部、
その他にタール19重量部を良く混合して高炉出銑孔用マ
ッド材を得た。Comparative Example As a first comparative example, 25 parts by weight of calcined bauxite having a particle size of 3 to 0.1 mm, 25 parts by weight of calcined bauxite having a particle size of 0.1 mm or less, and 1 mm or less as shown in Table 1 Comparative Example column Silicon carbide 2
0 parts by weight, 10 parts by weight of coke with a particle size of 2 to 0.1 mm, particle size 44μ
m or less, 10 parts by weight of silicon iron nitride, 10 parts by weight of kaolin clay,
In addition, 19 parts by weight of tar were mixed well to obtain a mud material for a blast furnace taphole.
この高炉出銑孔用マッド材の1400℃における熱間曲げ
強さ及び1550℃における耐食性を試験した結果を第１表
比較例欄に示す。The test results of the hot bending strength at 1400 ° C and the corrosion resistance at 1550 ° C of the mud material for the blast furnace taphole are shown in Table 1 Comparative Example column.
（比較例） 第２の比較例として、第１表比較例欄に示すように
粒径３〜0.1mmの焼ボーキサイト25重量部、粒径0.1mm以
下の焼ボーキサイト15重量部、粒径1mm以下の炭化珪素2
0重量部、粒径２〜0.1mmのコークス５重量部、粒径44μ
ｍ以下の窒化珪素鉄15重量部、粒径44μｍ以下の黒鉛10
重量部、カオリン粘土10重量部、その他にタール20重量
部を良く混合して高炉内銑孔用マッド材を得た。Comparative Example As a second comparative example, as shown in Table 1, Comparative Example column, 25 parts by weight of calcined bauxite having a particle size of 3 to 0.1 mm, 15 parts by weight of calcined bauxite having a particle size of 0.1 mm or less, and 1 mm or less Silicon carbide 2
0 parts by weight, 5 parts by weight of coke with a particle size of 2 to 0.1 mm, particle size 44μ
15 parts by weight of silicon nitride having a particle size of 44 μm or less
By weight, 10 parts by weight of kaolin clay and 20 parts by weight of tar were mixed well to obtain a mud material for a pig hole in a blast furnace.
この高炉出銑孔用マッド材の1400℃における熱間曲げ
強さ及び1550℃における耐食性の試験結果を第１表比較
例欄に示す。The test results of the hot bending strength at 1400 ° C and the corrosion resistance at 1550 ° C of the mud material for the blast furnace taphole are shown in Table 1 Comparative Example column.
第１表から明らかなように、本発明の各実施例は熱間
曲げ強さ、耐食性共に各比較例に比べて遥かに優れてい
ることがわかる。また、本発明の高炉出銑孔用マッド材
を高出銑比操業（出銑比2.1）の高炉の出銑孔に充填し
たところ、出銑中の孔径拡大が少なく、出銑時間が従来
に比して約1.5倍に延長され、マッド材の使用量及び労
働負荷の低減を図ることができた。As is clear from Table 1, each of the examples of the present invention is much superior in both the hot bending strength and the corrosion resistance as compared with the comparative examples. In addition, when the blast furnace tapping mud material of the present invention was filled into a tapping hole of a blast furnace having a high tapping ratio operation (tapping ratio 2.1), the hole diameter expansion during tapping was small, and tapping time was conventionally reduced. It was extended to about 1.5 times compared to the previous version, and it was possible to reduce the amount of mud used and the work load.
〔発明の効果〕 以上のように、本発明によれば、Al2O3含有量80％以
上のアルミナ原料を主骨材とし、粒径44μｍ以下の窒化
珪素鉄と粒径44μｍ以下の黒鉛及び粘土を組み合わせる
ことにより、使用温度域での耐食性、強度が充分とな
り、高出銑比操業時における出銑孔の急激な拡大を生じ
ない利点がある。 [Effect of the Invention] As described above, according to the present invention, an alumina raw material having an Al 2 O 3 content of 80% or more is used as a main aggregate, silicon iron nitride having a particle size of 44 μm or less, graphite having a particle size of 44 μm or less, and By combining clay, there is an advantage that the corrosion resistance and strength in the operating temperature range become sufficient and the tap hole does not suddenly expand at the time of high tapping ratio operation.
フロントページの続き (72)発明者 山崎 貞行 兵庫県赤穂市中広字東沖1576番地の２ 川崎炉材株式会社内 (72)発明者 小口 征男 兵庫県赤穂市中広字東沖1576番地の２ 川崎炉材株式会社内 (72)発明者 川上 辰男 兵庫県赤穂市中広字東沖1576番地の２ 川崎炉材株式会社内 (72)発明者 木口 満 岡山県倉敷市水島川崎通１丁目（番地な し） 川崎製鉄株式会社水島製鉄所内 (72)発明者 妹尾 義和 岡山県倉敷市水島川崎通１丁目（番地な し） 川崎製鉄株式会社水島製鉄所内 (58)調査した分野(Int.Cl.6，ＤＢ名) C21B 7/12 C04B 35/16Continuation of the front page (72) Inventor Sadayuki Yamazaki 1576-2, Higashi-oki, Aki-shi, Hyogo Prefecture Inside Kawasaki Furnace Materials Co., Ltd. (72) Inventor Masao Oguchi 1576-2, Higashi-oki, Ako-shi, Hyogo Prefecture Kawasaki Furnace Materials Co., Ltd. (72) Inventor Tatsuo Kawakami 2 1576, Higashi-oki, Nakahirohiro, Ako City, Hyogo Prefecture Kawasaki Furnace Materials Co., Ltd. (72) Inventor Mitsuru Kiguchi 1-chome, Mizushima Kawasaki-dori a tooth) Kawasaki Steel in the Corporation Mizushima Works (72) inventor Yoshikazu Seno Kurashiki, Okayama Prefecture Mizushimakawasakidori 1-chome (address teeth) Kawasaki Steel Co., Ltd. in the Mizushima Works (58) investigated the field (Int.Cl. 6 , DB name) C21B 7/12 C04B 35/16
Claims (1)
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、主原料として使用するアルミ
ナ含有量80％以上のアルミナ原料および残部の耐火材51
〜79.5重量部に、バインダーとして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。1. 0.5 to 4 parts by weight of graphite having a particle size of 44 μm or less, 15 to 30 parts by weight of silicon iron nitride having a particle size of 44 μm or less, 5 to 15 parts by weight of kaolin clay, and alumina containing as a main raw material Alumina raw material of 80% or more and the balance of refractory material 51
A mud material for a blast furnace taphole, wherein a residual carbon organic compound is added and kneaded as a binder to about 79.5 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1108257A JP2787950B2 (en) | 1989-04-27 | 1989-04-27 | Mud material for blast furnace taphole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1108257A JP2787950B2 (en) | 1989-04-27 | 1989-04-27 | Mud material for blast furnace taphole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02285014A JPH02285014A (en) | 1990-11-22 |
| JP2787950B2 true JP2787950B2 (en) | 1998-08-20 |
Family
ID=14480069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1108257A Expired - Lifetime JP2787950B2 (en) | 1989-04-27 | 1989-04-27 | Mud material for blast furnace taphole |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2787950B2 (en) |
Families Citing this family (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 |
| KR100742862B1 (en) * | 2001-08-24 | 2007-07-26 | 주식회사 포스코 | Fireproof composition for closing blast furnace exit |
| EP3053897B1 (en) * | 2015-02-09 | 2017-02-01 | Refractory Intellectual Property GmbH & Co. KG | Formulation and process for the manufacture of a refractory product, a refractory product and the use therof |
| CN111943653B (en) * | 2020-07-01 | 2023-02-03 | 长兴云峰炉料有限公司 | A kind of environment-friendly anhydrous taphole clay for blast furnace taphole and preparation method thereof |
| CN114538902B (en) * | 2021-12-31 | 2023-03-21 | 河南宏宇新材料科技有限公司 | Anhydrous stemming and preparation method thereof |
-
1989
- 1989-04-27 JP JP1108257A patent/JP2787950B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02285014A (en) | 1990-11-22 |
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