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METHOD FOR PRODUCING RECYCLED REFRACTORY RAW MATERIAL AND METHOD FOR PRODUCING REFRACTORY PRODUCT
To provide a method for producing a recycled refractory raw material in which a carbon content of the recycled refractory raw material can be sufficiently reduced by heat treatment at a lower temperature than that of conventional technologies, and to provide a method for producing a refractory product using the recycled refractory raw material as a raw material.SOLUTION: A method for producing a recycled refractory raw material includes: a granulation step of granulating a carbon-containing refractory brick to obtain a granulated brick; and a heating step of heating the granulated brick in an externally heating rotary kiln in the presence of an oxidizing gas to produce the recycled refractory raw material, wherein a heating temperature in the heating step is 850°C or more and 1,000°C or less, and a heating time in the heating step is 4 hours or more.SELECTED DRAWING: None
【課題】従来技術に比べて低温度の熱処理によって再生耐火原料の炭素含有量を十分に低減できる再生耐火原料の製造方法、および、かかる再生耐火原料を原料とする耐火物の製造方法、を提供する。【解決手段】炭素含有耐火れんがを細粒化して細粒化れんがを得る細粒化工程と、細粒化れんがを、外熱式ロータリーキルン中で、酸化性気体の存在下において加熱して、再生耐火原料を得る熱処理工程と、を含み、熱処理工程における加熱温度が８５０℃以上１０００℃以下であり、熱処理工程における加熱時間が４時間以上である。【選択図】なし
METHOD FOR PRODUCING RECYCLED REFRACTORY RAW MATERIAL AND METHOD FOR PRODUCING REFRACTORY PRODUCT
To provide a method for producing a recycled refractory raw material in which a carbon content of the recycled refractory raw material can be sufficiently reduced by heat treatment at a lower temperature than that of conventional technologies, and to provide a method for producing a refractory product using the recycled refractory raw material as a raw material.SOLUTION: A method for producing a recycled refractory raw material includes: a granulation step of granulating a carbon-containing refractory brick to obtain a granulated brick; and a heating step of heating the granulated brick in an externally heating rotary kiln in the presence of an oxidizing gas to produce the recycled refractory raw material, wherein a heating temperature in the heating step is 850°C or more and 1,000°C or less, and a heating time in the heating step is 4 hours or more.SELECTED DRAWING: None
【課題】従来技術に比べて低温度の熱処理によって再生耐火原料の炭素含有量を十分に低減できる再生耐火原料の製造方法、および、かかる再生耐火原料を原料とする耐火物の製造方法、を提供する。【解決手段】炭素含有耐火れんがを細粒化して細粒化れんがを得る細粒化工程と、細粒化れんがを、外熱式ロータリーキルン中で、酸化性気体の存在下において加熱して、再生耐火原料を得る熱処理工程と、を含み、熱処理工程における加熱温度が８５０℃以上１０００℃以下であり、熱処理工程における加熱時間が４時間以上である。【選択図】なし
METHOD FOR PRODUCING RECYCLED REFRACTORY RAW MATERIAL AND METHOD FOR PRODUCING REFRACTORY PRODUCT
再生耐火原料の製造方法および耐火物の製造方法
SHIMADA TAKESHI (author)
2024-01-31
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2017
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