JPH06219823A - Upper nozzle brick for slide gate - Google Patents

Upper nozzle brick for slide gate

Info

Publication number
JPH06219823A
JPH06219823A JP5029952A JP2995293A JPH06219823A JP H06219823 A JPH06219823 A JP H06219823A JP 5029952 A JP5029952 A JP 5029952A JP 2995293 A JP2995293 A JP 2995293A JP H06219823 A JPH06219823 A JP H06219823A
Authority
JP
Japan
Prior art keywords
upper nozzle
nozzle brick
weight
slide gate
aluminous
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
Application number
JP5029952A
Other languages
Japanese (ja)
Inventor
Yasuta Koike
池 康 太 小
Takeshi Yoshida
田 毅 吉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TYK Corp
Original Assignee
TYK Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TYK Corp filed Critical TYK Corp
Priority to JP5029952A priority Critical patent/JPH06219823A/en
Publication of JPH06219823A publication Critical patent/JPH06219823A/en
Pending legal-status Critical Current

Links

Landscapes

  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

PURPOSE:To suppress the generation of crack caused by a rapid thermal shock in an usual high aluminous upper nozzle brick for SN with sufficient effect. CONSTITUTION:In the upper nozzle brick for slide gate made of 60-90wt.% aluminous refractory material, 10-45wt.% refractory raw material having a chemical composition of 30-80wt.% Al2O3, 10-65wt.% ZrO2 and 5-25wt.% SiO2 is used. As a result, in the high aluminous upper nozzle brick for SN using the refractory raw material having the chemical composition of 30-80wt.% Al2O3, 10-65wt.% ZrO2 and 5-25wt.%. SiO2, the spalling resistance is extremely improved and the service life of 1.3-1.6 times that of the conventional high aluminous upper nozzle brick for SN is attained even in practical use.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は溶融金属の流量を制御す
るスライドゲートに用いられるスライドゲート用上部ノ
ズルレンガに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper nozzle brick for a slide gate used in a slide gate for controlling the flow rate of molten metal.

【0002】[0002]

【従来の技術】一般的にスライドゲート方式(以下SN
方式と記す)は、溶融金属流量の有用なコントロール手
段として使用されており、特に使用条件が厳しい鉄鋼業
においては広く使用されている。
2. Description of the Related Art Generally, a slide gate method (hereinafter referred to as SN
Method) is used as a useful means for controlling the flow rate of molten metal, and is widely used in the iron and steel industry where the operating conditions are particularly severe.

【0003】このSN方式は周知の様に上部ノズル、プ
レートレンガ(固定板及びスライド板)及び下部ノズル
の三つの部分より構成されており、各耐火物共、高温溶
鋼との接触による化学的浸蝕、熱的スポール及び溶鋼流
による機械的摩耗等の要因により耐用が律速されてい
る。
As is well known, this SN system is composed of three parts, an upper nozzle, a plate brick (fixed plate and slide plate), and a lower nozzle. Each refractory material is chemically eroded by contact with high temperature molten steel. The service life is limited by factors such as mechanical wear due to thermal spalls and molten steel flow.

【0004】この中で上部ノズルについてはSNメカの
構造上SN用レンガの最上段に位置しており、溶融金属
を最先端で直接受けるために、耐スポール性を改善する
ことが安定使用する上で重要な課題である。
Among them, the upper nozzle is located at the uppermost stage of the SN brick due to the structure of the SN mechanism, and since it directly receives the molten metal at the leading edge, it is necessary to improve the spall resistance for stable use. Is an important issue.

【0005】[0005]

【発明が解決しようとする課題】一般的にはハイ−アル
ミナ質のSN用上部ノズルレンガが広く使用されている
が、このハイ−アルミナ質のSN用上部ノズルレンガに
おいては急激な熱衝撃によるキレツの発生が見られ、充
分な効果が得られていないのが現状である。
Generally, a high-alumina SN upper nozzle brick for SN is widely used. However, in the high-alumina SN upper nozzle brick, a crack due to a rapid thermal shock is generated. Is occurring, and it is the current situation that a sufficient effect is not obtained.

【0006】[0006]

【課題を解決するための手段】そこで本発明はこのハイ
−アルミナ質SN用上部ノズルレンガの耐スポーリング
性を改善するために、Al2330〜80重量%,Zr
210〜65重量%,SiO25〜25重量%の化学組
成を有する低膨張性の耐火性原料10〜45重量%を使
用することを特徴としている。
In order to improve the spalling resistance of the upper nozzle brick for high-alumina SN, the present invention uses 30 to 80% by weight of Al 2 O 3 and Zr.
It is characterized by using 10 to 45% by weight of a low-expansion refractory raw material having a chemical composition of 10 to 65% by weight of O 2 and 5 to 25% by weight of SiO 2 .

【0007】この耐火性原料の化学組成としては、Al
2330〜80%重量%,ZrO210〜65重量%,S
iO25〜25重量%が適量である。ZrO2量が10〜6
5重量%未満ではムライト又はコランダム結晶内部ある
いは周知に析出するジルコニアの量が少なく、低膨張性
の特徴が損なわれるばかりでなく、耐蝕性に問題が生じ
て来る。またZrO2の量が65重量%を越えるとZrO2
が単斜型結晶で存在するために異常膨張が生じ、耐スポ
ール性に劣る。また残りの鉱物相をムライトとコランダ
ムとして共存させるためには、Al2330〜80重量
%,SiO25〜25重量%にそれぞれ限定される。
The chemical composition of this refractory raw material is Al
2 O 3 30-80% by weight, ZrO 2 10-65% by weight, S
A suitable amount is 5 to 25% by weight of iO 2 . ZrO 2 amount is 10-6
If it is less than 5% by weight, the amount of zirconia precipitated in the mullite or corundum crystal or in the well-known manner is small, and not only the low expansion property is impaired but also corrosion resistance becomes problematic. The amount of ZrO 2 exceeds 65% by weight ZrO 2
Exists in a monoclinic type crystal, which causes abnormal expansion and is inferior in spall resistance. Further, in order to coexist the remaining mineral phase as mullite and corundum, Al 2 O 3 is limited to 30 to 80% by weight and SiO 2 to 5 to 25% by weight, respectively.

【0008】これらの化学組成を有する耐火性原料の使
用量としては10〜45重量%が適量である。10重量
%未満では耐スポーリング性の改善効果が少なく、また
45重量%より多い場合は、耐蝕性に問題が生じて来る
ためである。また使用部位としては粗粒,中粒,ビフン
部どの部位に使用してもかまわないが、耐蝕性を考慮し
た場合、粗粒,中粒域で使用するのが好ましい。
A suitable amount of the refractory raw material having these chemical compositions is 10 to 45% by weight. This is because if it is less than 10% by weight, the effect of improving the spalling resistance is small, and if it is more than 45% by weight, a problem arises in corrosion resistance. It may be used in any of coarse particles, medium particles, and bifunous parts, but in consideration of corrosion resistance, it is preferable to use in coarse particles and medium particles.

【0009】これらの化学成分を有する耐火物原料を使
用したハイ−アルミナ質SN用上部ノズルレンガについ
ては、混練,成形後、焼成して製造される。またその
後、タール,ピッチ等を含浸してもかまわない。以下に
実施例により説明する。
The upper nozzle brick for high-alumina SN using refractory raw materials having these chemical components is manufactured by kneading, molding and then firing. After that, tar, pitch, etc. may be impregnated. An example will be described below.

【0010】[0010]

【実施例】これらの化学成分を有する耐火性原料を使用
したハイ−アルミナ質SN用上部ノズルの諸物性値及び
実炉での使用実績を以下表1・2に示す。
[Examples] The physical properties of the upper nozzle for high-alumina SN using the refractory raw materials having these chemical components and the actual use results in an actual furnace are shown in Tables 1 and 2 below.

【0011】[0011]

【表1】 [Table 1]

【0012】[0012]

【表2】 [Table 2]

【0013】[0013]

【発明の効果】以上の様にAl2330〜80重量%,
ZrO210〜65重量%,SiO25〜25重量%の化学
成分を有する耐火原料を使用したハイ−アルミナ質SN
用上部ノズルレンガにおいては、耐スポーリング性が大
巾に改善され、実使用においても従来のハイ−アルミナ
質SN用上部ノズルレンガに比較して、1.3〜1.6
倍の耐用を得ることが出来た。
As described above, Al 2 O 3 30 to 80% by weight,
High-alumina SN using a refractory raw material having a chemical composition of 10 to 65% by weight of ZrO 2 and 5 to 25% by weight of SiO 2.
In the upper nozzle brick for use in sponge, the spalling resistance is greatly improved, and in actual use, 1.3 to 1.6 is more than that in the conventional upper nozzle brick for high-alumina SN.
I was able to get double the service life.

Claims (1)

【特許請求の範囲】[Claims] アルミナ質耐火材料60〜90重量%から成るスライド
ゲート用上部ノズルレンガにおいて、Al2330〜8
0重量%,ZrO210〜65重量%,SiO25〜25重
量%の化学組成を有する耐火性原料を10〜45重量%
を使用したことを特徴とするスライドゲート用上部ノズ
ルレンガ。
In an upper nozzle brick for a slide gate composed of 60 to 90% by weight of an alumina-based refractory material, Al 2 O 3 30 to 8
10 to 45% by weight of a refractory raw material having a chemical composition of 0% by weight, ZrO 2 10 to 65% by weight, and SiO 2 5 to 25% by weight.
The upper nozzle brick for slide gates is characterized by using.
JP5029952A 1993-01-25 1993-01-25 Upper nozzle brick for slide gate Pending JPH06219823A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5029952A JPH06219823A (en) 1993-01-25 1993-01-25 Upper nozzle brick for slide gate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5029952A JPH06219823A (en) 1993-01-25 1993-01-25 Upper nozzle brick for slide gate

Publications (1)

Publication Number Publication Date
JPH06219823A true JPH06219823A (en) 1994-08-09

Family

ID=12290328

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5029952A Pending JPH06219823A (en) 1993-01-25 1993-01-25 Upper nozzle brick for slide gate

Country Status (1)

Country Link
JP (1) JPH06219823A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100352579C (en) * 2005-03-31 2007-12-05 宝山钢铁股份有限公司 Anti-clog immersion type down spout material
JP2015038031A (en) * 2005-09-26 2015-02-26 サン−ゴバン セントレ デ レシェルシェ エト デチュード ユーロピーン Sintered refractory product exhibiting enhanced thermal shock resistance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100352579C (en) * 2005-03-31 2007-12-05 宝山钢铁股份有限公司 Anti-clog immersion type down spout material
JP2015038031A (en) * 2005-09-26 2015-02-26 サン−ゴバン セントレ デ レシェルシェ エト デチュード ユーロピーン Sintered refractory product exhibiting enhanced thermal shock resistance

Similar Documents

Publication Publication Date Title
JPS5919067B2 (en) High durability casting nozzle
US8138110B2 (en) Fireproof ceramic mix, fireproof ceramic molded body formed of said mix and use thereof
JPH06219823A (en) Upper nozzle brick for slide gate
JPH06277825A (en) Lower nozzle brick for sliding gate
JPH06219824A (en) Upper nozzle brick for silde gate
JPH0687667A (en) Zirconia-mullite containing castable refractory
JPH06277824A (en) Lower nozzle brick for sliding gate
CN112552059A (en) Steel ladle slag line repairing material
JPH06218531A (en) Upper nozzle brick for sliding gate
JPS59162174A (en) Continuous casting nozzle
JPH07308759A (en) Plate brick for sliding gate
JPH07284917A (en) Upper nozzle brick for sliding gate
JPH0633179B2 (en) Irregular refractory for pouring
JP2020100853A (en) Monolithic refractory for blast furnace runner cover
JPH0672763A (en) Plate brick for slide gate
JPH06219825A (en) Upper nozzle brick for slide gate
JPH07284916A (en) Upper nozzle brick for sliding gate
JPH0699269A (en) Lower nozzle brick for sliding gate
JPH0699270A (en) Lower nozzle brick for sliding gate
JPH07284920A (en) Lower nozzle brick for sliding gate
KR930011274B1 (en) Unshaped refractories of alumina-spinel
JP2683217B2 (en) Nozzle for molten steel casting
JPH07308769A (en) Upper nozzle brick for slide gate
JPH0672764A (en) Plate brick for slide gate
JP3088096B2 (en) High corrosion resistant alumina-chromium refractory