Title:
マグネシア−クロム質転炉出鋼口スリーブ煉瓦の製造方法
Document Type and Number:
Japanese Patent JP6826282
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a magnesia-chromium brick capable of extending further life while maintaining spalling resistance close to that of a magnesia-chromium brick.SOLUTION: There is provided a manufacturing method of a magnesia-chromium brick in which pitch is impregnated into a burned magnesia-chromium brick. The burned magnesia-chromium brick contains MgO of 25 to 85 mass%, CrOof 5 to 55 mass%, AlOof 1 to 14 mass%, FeOof 2 to 17 mass% and impurities of less than 5 mass%. Burning temperature of the burned magnesia-chromium brick is 1650 to 2000°C. Impregnation rate by a pitch impregnation treatment is 2 to 8 mass%, the pitch impregnation treatment includes inputting the magnesium-chromium brick after burning in a melting tank excess heated at 100 to 400°C in advance, and conducting a treatment at pressing press of 10 kgf/cmor more and pressing time of 2 hours or more. The pitch used in the pitch impregnation treatment is 5 mass% or less of a quinoline insoluble component and fixed carbon amount is 25 mass% or more.SELECTED DRAWING: None
Inventors:
Ryoma Fujiyoshi
Atsushi Torigoe
Kazuhiro Inoue
Akira Murakami
Atsushi Torigoe
Kazuhiro Inoue
Akira Murakami
Application Number:
JP2016142430A
Publication Date:
February 03, 2021
Filing Date:
July 20, 2016
Export Citation:
Assignee:
Shinagawa Refractories Co., Ltd.
International Classes:
C04B35/043; C21C5/46; F27D1/00
Domestic Patent References:
| JP57158312A | ||||
| JP51132208A | ||||
| JP2003137663A | ||||
| JP7188566A | ||||
| JP6220517A | ||||
| JP2000191364A |
Other References:
古川 猛,III編 造粒の応用,造粒ハンドブック,オーム社 佐藤 政次,第1版
安達 啓介 Keisuke Adachi,高温プロセス High Temperature Processes, Current Advances in Materials and Processes,社団法人日本鉄鋼協会 内仲 康夫,第12巻
安達 啓介 Keisuke Adachi,高温プロセス High Temperature Processes, Current Advances in Materials and Processes,社団法人日本鉄鋼協会 内仲 康夫,第12巻
Attorney, Agent or Firm:
Toyoake Fukui