Title:
【発明の名称】廃棄物を溶融する炉
Document Type and Number:
Japanese Patent JP3375758
Kind Code:
B2
Abstract:
PURPOSE: To provide the erosion resistance and the wear resistance in the case of melting waste and to endure for a long time use by forming the part of melted material in contact with its liquid surface and the part of the material in contact when the material flows out of zirconia refractory containing a specific amount or more of ZrO2 . CONSTITUTION: A furnace 1 for melting waste is formed at the part in contact with at least the liquid surface 16 of molten material 14 and the part in contact when the material 14 of a discharge port 15 flows out of zirconia refractory 13 containing 85wt.% of more of ZrO2 . Generally, the waste becomes belted state at 1300-1400 deg.C. The refractory containing much Al2 O3 is melted to molten material near at 1360 deg.C in reaction with melting CaO during melting at the Al2 O3 in the refraction. On the contrary, ZrO2 in the refractory containing much ZrO2 is not reacted with the melted material even at 1900 deg.C, and not melted. The crystal of the ZrO2 has high hardness, and particularly electroforming refractory has further excellent wear resistance as compared with baked refractory due to the denseness of the structure.
Inventors:
Shigeo Endo
Masaki Nakanishi
Itaru Hashimoto
Masaki Nakanishi
Itaru Hashimoto
Application Number:
JP27720994A
Publication Date:
February 10, 2003
Filing Date:
October 18, 1994
Export Citation:
Assignee:
Toshiba Monoflux Co., Ltd.
International Classes:
B09B3/00; F23G5/00; F27B3/14; F27D1/00; F23M5/00; (IPC1-7): F27D1/00; B09B3/00; F23G5/00; F27B3/14
Domestic Patent References:
| JP62241869A | ||||
| JP6137764A | ||||
| JP64350B1 |
Attorney, Agent or Firm:
Toru Tanabe