JPS58167715A - Refractory material for nozzle useful in refining molten metal - Google Patents

Refractory material for nozzle useful in refining molten metal

Info

Publication number
JPS58167715A
JPS58167715A JP5054682A JP5054682A JPS58167715A JP S58167715 A JPS58167715 A JP S58167715A JP 5054682 A JP5054682 A JP 5054682A JP 5054682 A JP5054682 A JP 5054682A JP S58167715 A JPS58167715 A JP S58167715A
Authority
JP
Japan
Prior art keywords
nozzle
refractory material
molten metal
mgo
cao
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
JP5054682A
Other languages
Japanese (ja)
Inventor
Yoshiharu Miyawaki
宮脇　芳治
Masayuki Hanmiyo
半明　正之
Yusuke Shiratani
白谷　勇介
Teruyuki Hasegawa
輝之 長谷川
Youichi Tanmura
洋一 丹村
Noriyuki Hiraga
紀幸 平賀
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP5054682A priority Critical patent/JPS58167715A/en
Priority to PCT/JP1983/000098 priority patent/WO1983003427A1/en
Priority to BR8306711A priority patent/BR8306711A/en
Priority to AU13719/83A priority patent/AU567023B2/en
Priority to US06/556,162 priority patent/US4539043A/en
Priority to EP83900974A priority patent/EP0105380B1/en
Publication of JPS58167715A publication Critical patent/JPS58167715A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE:To obtain the titled refractory material having a long service life, by forming it from the specified amounts of C and one or more of MgO, Al2O3, CaO, Cr2O3 and ZrO2. CONSTITUTION:The refractory material for a gas-injecting nozzle to be provided at the bottom or the like of a molten metal-refining furnace contains 5-30% C and the balance one or more of MgO, Al2O3, CaO, Cr2O3 and ZrO2. If C content falls below the lower limit, the penetration of steel or slag into the nozzle becomes large so that the dissolution loss of the nozzle and its damage caused by thermal spalling are large. If C content exceeds the upper limit, the strength and erosion resistance of the nozzle are poor. The addition of one or more of MgO, Al2O3, CaO, Cr2O3 and ZrO2 is effective in improving the quality, spalling resistance, wear resistance, strength, etc. of the refractory material.

Description

【発明の詳細な説明】 本発明は、溶融金属精錬炉Ｏ炉底等に設置されここから
ガスを吹込むためのノズル耐火物に関するものであって
、その目的とするところは、ノズル自体の耐用寿命を延
長させることにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nozzle refractory installed at the bottom of a molten metal smelting furnace O for blowing gas from there, and its purpose is to extend the service life of the nozzle itself. The purpose is to extend it.

従来、溶融金属の精錬処理、脱ガス、攪拌などを目的と
して、溶融金属精錬炉Ｏ主として底部にガス吹込Ｏため
の耐火物製ノズルを設け、ここから溶融金属中に各種の
ガスを吹込むことが行われていることは周知である。又
、最近では転炉などの精錬炉虻おいて１耐大物からなる
ガス吹込用ノズルを用いて底部からガスを吹込む仁とが
行われている。Ｌ＊して、このような目的のために用い
られるノズル耐大物は、化学組成が適当でないと溶鋼、
スラグＯ浸透が大とな抄、又熱的スゲ−リンダによる損
傷も大きいという間層がある。Conventionally, for the purpose of refining molten metal, degassing, stirring, etc., a molten metal smelting furnace O mainly has a refractory nozzle at the bottom for blowing gas, and various gases are blown into the molten metal from there. It is well known that this is being done. Furthermore, recently, gas has been injected from the bottom of a refining furnace such as a converter using a gas injection nozzle made of a large material. If the chemical composition of the nozzle resistant material used for this purpose is not appropriate, it will cause molten steel,
There is a layer in which the slag O penetration is large, and the damage caused by the thermal sgelinder is also large.

本発明嬬、このようなガス吹込みのためＯ溶融金属精錬
用ノズル耐火物における未解決の問題を堺決する友めＫ
ｋされたものである。The present invention provides a nozzle for molten metal refining for gas injection, which solves the unresolved problems in refractories.
It has been k.

即ち、本発明り要旨とするところは、港融金属精練炉Ｏ
炉底等Ｋｆｌ装置されここからガスを吹込むためのノズ
ル耐大物であって、その化学成分が０５〜３０％残り°
はＭｊＯｌｎ、ｏ、、　　Ｃａｂ、　　Ｃｒ１ＯＩＺｒ
Ｏ１の１種又は２種以上を含有する溶融金属精錬炉ノズ
ル耐火物なる％Ｏである。That is, the gist of the present invention is that the Minato Metal Refining Furnace O
It is a large nozzle for blowing gas from the Kfl device such as the bottom of the furnace, and its chemical components remain between 0.5% and 30%.
is MjOln, o,, Cab, Cr1OIZr
%O, which is a molten metal smelting furnace nozzle refractory containing one or more types of O1.

本発明において、ノズル耐火物の化学成分中Ｃを５〜３
０％配合することの理由社、下課として５襲未満で轢鋼
、スラグＯ浸透が大とな珈博損が大自＜、１大熱的スポ
ーリングによる損傷が大自−からであ妙、上限として３
０％を超えると強度間及び耐食性面て劣るからである。In the present invention, C in the chemical components of the nozzle refractory is 5 to 3.
The reason for 0% blending is that less than 5 hits will result in a large loss of coffee due to the penetration of road steel and slag O, and the damage caused by thermal spalling will be large. 3 as the upper limit
This is because if it exceeds 0%, the strength and corrosion resistance will be poor.

又、本発明において、ノズル耐火物の化学成分中ＭｇＯ
，ＡｌＩＯ３、ＣａＯ１ＣｒｌＯ１、Ｚｒ０１の１種又
は２種以上を含有させることの理由は耐火物の品質向上
を図り、耐スｌ−リング性、耐摩耗性、強度略の向上の
ためである。In addition, in the present invention, MgO in the chemical components of the nozzle refractory
, AlIO3, CaO1CrlO1, and Zr01 is included to improve the quality of the refractory and to improve sling resistance, abrasion resistance, and strength.

又、ノズル耐火物の原料として用いられるものを次に示
す。In addition, the following are materials used as raw materials for nozzle refractories.

〔酸化物）　ＭｇＯ、ＣａＯ、Ｍｇ０−Ｃｓ＋へＺｒＯ
２、Ａ１．Ｏ３、Ｃｒ愈ＯＨ，ＢＪｇＯ−ＡｉｌＯｌ 〔炭素及び炭化物）　Ｃ、８ｉＣ、ＺｒＣ、Ｗｅ　ｊム
Ｃ１４Ｃ 〔窒化物）　８ｉ、Ｎ４、ＢＮ 上記の配合物を主成分とする不焼成品又は焼成品及び焼
成後ピッチ含浸したものを本発明の対象としており、こ
の場合の耐火物の製造方法は通常の方法によるものとす
る。[Oxide] MgO, CaO, Mg0-Cs+ to ZrO
2.A1. O3, CrOH, BJgO-AilOl [Carbon and carbides] C, 8iC, ZrC, Wejmu C14C [Nitrides] 8i, N4, BN Unfired products or fired products containing the above compounds as main components, and fired products The object of the present invention is the post-pitch-impregnated refractory, and the method for manufacturing the refractory in this case is a conventional method.

本発明のノズル耐火物は、１■中程度の貫通孔を設けた
場合の溶損速度がα′８〜α９■／ｃｈ　　と極めて溶
損速度が小さく、従って耐用寿命を延長させることが可
能である。The nozzle refractory of the present invention has an extremely low erosion rate of α'8 to α9■/ch when a medium-sized through hole is provided, and therefore it is possible to extend the service life. be.

Claims (1)

【特許請求の範囲】[Claims] 溶融金属精錬炉の炉底等に設置されここからガスを吹込
むためのノズル耐火物であって、その化学成分が０５〜
３０襲残りはＭｇＯ、ｕ、ｏ、、　Ｃｒ１ＯＩＺｒＯ１
（）　１種又は２種以上を含有する溶融金属精錬用ノズ
ル耐火物。A nozzle refractory installed at the bottom of a molten metal smelting furnace, etc., for blowing gas from there, the chemical composition of which is 05~
The rest of the 30th attack are MgO, u, o,, Cr1OIZrO1
() A nozzle refractory for molten metal refining containing one or more types.
JP5054682A 1982-03-29 1982-03-29 Refractory material for nozzle useful in refining molten metal Pending JPS58167715A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP5054682A JPS58167715A (en) 1982-03-29 1982-03-29 Refractory material for nozzle useful in refining molten metal
PCT/JP1983/000098 WO1983003427A1 (en) 1982-03-29 1983-03-29 Bottom blowing gas nozzle in molten metal refining furnace and method of melting steel using the same nozzle
BR8306711A BR8306711A (en) 1982-03-29 1983-03-29 GAS INSULATING TUBE THROUGH THE FUND FOR FUSING METAL REFINING OVEN AND STEEL REFINING PROCESS USING THE SAME
AU13719/83A AU567023B2 (en) 1982-03-29 1983-03-29 Bottom blown gas blowing nozzle for maltev metal refining furnace and steel refining method using the same
US06/556,162 US4539043A (en) 1982-03-29 1983-03-29 Bottom-blown gas blowing nozzle
EP83900974A EP0105380B1 (en) 1982-03-29 1983-03-29 Bottom blowing gas nozzle in molten metal refining furnace and method of melting steel using the same nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5054682A JPS58167715A (en) 1982-03-29 1982-03-29 Refractory material for nozzle useful in refining molten metal

Publications (1)

Publication Number Publication Date
JPS58167715A true JPS58167715A (en) 1983-10-04

Family

ID=12862004

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5054682A Pending JPS58167715A (en) 1982-03-29 1982-03-29 Refractory material for nozzle useful in refining molten metal

Country Status (1)

Country Link
JP (1) JPS58167715A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5518556A (en) * 1978-07-25 1980-02-08 Kurosaki Refract Co Ltd Formed body for gas blowing
JPS5597435A (en) * 1979-01-18 1980-07-24 Kurosaki Refract Co Ltd Molded body for gas blowing in
JPS55149750A (en) * 1979-05-11 1980-11-21 Kawasaki Steel Corp Gas blowing plug for molten metal vessel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5518556A (en) * 1978-07-25 1980-02-08 Kurosaki Refract Co Ltd Formed body for gas blowing
JPS5597435A (en) * 1979-01-18 1980-07-24 Kurosaki Refract Co Ltd Molded body for gas blowing in
JPS55149750A (en) * 1979-05-11 1980-11-21 Kawasaki Steel Corp Gas blowing plug for molten metal vessel

Similar Documents

Publication Publication Date Title
KR930005250B1 (en) Refractory containing aluminium nitride oxide refractory for sliding nozzle and nozzle for continuously casting
US5411997A (en) Mud material used for iron tap hole in blast furnace
JPS58167715A (en) Refractory material for nozzle useful in refining molten metal
US3078173A (en) Aluminum melting furnace refractory
US5700309A (en) Method and powder mixture for repairing oxide based refractory bodies
JPH06144939A (en) Basic castable refractory
US499248A (en) Basic lining
JP3771635B2 (en) Converter refining method
JPS60245714A (en) Building method of aod furnace
JP2510898B2 (en) Refractory for lining of ladle for melting high-cleanliness molten steel
CA1143939A (en) Bottom outlet in metallurgical vessels used for molten steel
JP2718271B2 (en) Repairing and extending the life of alumina refractories
KR910008205B1 (en) Agent for controling the slag foaming
JPH05138338A (en) Ladle lower nozzle for casting molten steel having high cleanliness
JPH10306308A (en) Carbon-containing refractory for tuyere in molten metal refining furnace
Bose et al. Current Status and Development of Refractories With Reference to L. F. and V. O. D. Practices and Purging Refractories
SU1165528A1 (en) Composition for lining ingot moulds and feeder heads
KR810002042B1 (en) Method of prolonging durable life of aod furnace refractory linings
JP2953293B2 (en) Gas injection tuyere structure for steelmaking furnace
JPH0735308B2 (en) Irregular shaped refractory lining
JP2000063929A (en) Lining structure of vacuum vessel in vacuum degassing apparatus
JPH11256222A (en) Tuyere for fitting porous plug
JP4011774B2 (en) Secondary smelting ladle lining refractories using irregular refractories
JPH07121826B2 (en) Refractory for ladle and ladle
US3410930A (en) Method of improving the operation of a cupola