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A platform for research: civil engineering, architecture and urbanism
- METHOD FOR REFINING OF WASTE REFRACTORY MATERIALS CONTAINING SPINEL AND DECARBONATION
The present invention relates to a method for refining waste magnesia-spinel blocks for cement, which comprises: a raw material sorting step (S10) of collecting waste magnesia-spinel blocks as raw materials to remove slag therefrom; a water treatment step (S20) of immersing the sorted raw material into treatment water to discharge impurities and gas; a drying step (S30) of transferring the raw material subjected to water treatment to a drying furnace to evaporate moisture and remaining gas; a grinding step (S40) of grinding the dried raw material to obtain the raw material having a particle size of 6 mm or less; a decarburizing step (S50) of mixing the obtained raw materials with magnesia-carbonaceous waste refractory material having a particle size of 1.2 mm or less at the same ratio of weight to introduce the mixture into the decarburizing apparatus (100), and then heating the same at 1,300 to 1,600°C for 12 hours to oxidize carbon; a cooling step (S60) of infusing nitrogen gas into the decarburizing apparatus (100) after the decarburizing step (S50) is completed to cool the decarburized raw material for 3 to 5 hours; and a size separation step (S70) of sorting foreign substances by size separation from the cooled raw material to obtain MgO refractory raw material. In addition, the present invention provides a decarburizing apparatus used for the refining method and MgO refractory raw material prepared thereby. According to the present invention, resources can be reused to efficiently prepare high-purity of magnesium oxide refractory raw material.
본 발명은 시멘트용 폐 마그네시아-스피넬 벽돌의 정제방법에 관한 발명으로, 폐 마그네시아-스피넬 벽돌을 원료로 수거하여 슬래그를 제거하는 원료선별단계(S10)와, 선별된 원료를 처리수에 침지하여 불순불 및 가스를 배출하는 수처리단계(S20)와, 수처리된 원료를 건조로로 이송하여 수분 및 잔여 가스를 증발하는 건조단계(S30)와, 건조된 원료를 분쇄하여 6mm 이하 입도의 원료를 수득하는 분쇄단계(S40)와, 수득한 원료와, 1.2mm 이하 입도의 마그네시아-카본질 폐 내화재 원료를 동일 중량비로 혼합하여 탈탄장치(100)에 투입하고 1300 내지 1600℃ 온도에서 12시간 동안 가열하여 카본을 산화하는 탈탄단계(S50)와, 상기 탈탄단계(S50)를 마친 후 탈탄장치(100)에 질소를 주입하여 3 내지 5시간 동안 탈탄된 원료를 냉각하는 냉각단계(S60)와, 냉각된 원료에서 이물질을 입도 분리로 선별하여 MgO 내화원료를 수득하는 입도분리단계(S70)로 이루어진 정제방법 및 상기 정제방법에 사용되는 탈탄장치와 그에 의해 제조하는 MgO 내화원료를 구성함에 따라 자원을 재활용하여 효율적으로 고순도의 산화마그네슘 내화원료를 제조하는 것이 특징이다.
- METHOD FOR REFINING OF WASTE REFRACTORY MATERIALS CONTAINING SPINEL AND DECARBONATION
The present invention relates to a method for refining waste magnesia-spinel blocks for cement, which comprises: a raw material sorting step (S10) of collecting waste magnesia-spinel blocks as raw materials to remove slag therefrom; a water treatment step (S20) of immersing the sorted raw material into treatment water to discharge impurities and gas; a drying step (S30) of transferring the raw material subjected to water treatment to a drying furnace to evaporate moisture and remaining gas; a grinding step (S40) of grinding the dried raw material to obtain the raw material having a particle size of 6 mm or less; a decarburizing step (S50) of mixing the obtained raw materials with magnesia-carbonaceous waste refractory material having a particle size of 1.2 mm or less at the same ratio of weight to introduce the mixture into the decarburizing apparatus (100), and then heating the same at 1,300 to 1,600°C for 12 hours to oxidize carbon; a cooling step (S60) of infusing nitrogen gas into the decarburizing apparatus (100) after the decarburizing step (S50) is completed to cool the decarburized raw material for 3 to 5 hours; and a size separation step (S70) of sorting foreign substances by size separation from the cooled raw material to obtain MgO refractory raw material. In addition, the present invention provides a decarburizing apparatus used for the refining method and MgO refractory raw material prepared thereby. According to the present invention, resources can be reused to efficiently prepare high-purity of magnesium oxide refractory raw material.
본 발명은 시멘트용 폐 마그네시아-스피넬 벽돌의 정제방법에 관한 발명으로, 폐 마그네시아-스피넬 벽돌을 원료로 수거하여 슬래그를 제거하는 원료선별단계(S10)와, 선별된 원료를 처리수에 침지하여 불순불 및 가스를 배출하는 수처리단계(S20)와, 수처리된 원료를 건조로로 이송하여 수분 및 잔여 가스를 증발하는 건조단계(S30)와, 건조된 원료를 분쇄하여 6mm 이하 입도의 원료를 수득하는 분쇄단계(S40)와, 수득한 원료와, 1.2mm 이하 입도의 마그네시아-카본질 폐 내화재 원료를 동일 중량비로 혼합하여 탈탄장치(100)에 투입하고 1300 내지 1600℃ 온도에서 12시간 동안 가열하여 카본을 산화하는 탈탄단계(S50)와, 상기 탈탄단계(S50)를 마친 후 탈탄장치(100)에 질소를 주입하여 3 내지 5시간 동안 탈탄된 원료를 냉각하는 냉각단계(S60)와, 냉각된 원료에서 이물질을 입도 분리로 선별하여 MgO 내화원료를 수득하는 입도분리단계(S70)로 이루어진 정제방법 및 상기 정제방법에 사용되는 탈탄장치와 그에 의해 제조하는 MgO 내화원료를 구성함에 따라 자원을 재활용하여 효율적으로 고순도의 산화마그네슘 내화원료를 제조하는 것이 특징이다.
- METHOD FOR REFINING OF WASTE REFRACTORY MATERIALS CONTAINING SPINEL AND DECARBONATION
시멘트용 폐 마그네시아-스피넬 벽돌의 정제방법
KIM DAE CHUL (author)
2019-01-03
Patent
Electronic Resource
Korean
IPC:
C04B
Kalk
,
LIME
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