A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a process for producing sodium carbonate, aluminum oxide and blended cement from red mud. The process comprises the following steps: diluting red mud to obtain diluted red mud,feeding the diluted red mud into an a-stage washing unit, feeding the diluted red mud into a carbonization unit A for reaction, feeding the reacted diluted red mud into a b-stage washing unit for washing, feeding the diluted red mud into a filtering unit, filtering to obtain low-sodium red mud, and mixing and grinding the low-sodium red mud and lime to obtain blended cement; in the process, collecting washing water that is used for washing red mud in the b-stage washing unit, feeding the washing water into the a-stage washing unit for a-stage washing; collecting the washing water that is usedfor washing the red mud in the a-stage washing unit; delivering one part of the washing water to an m-stage evaporation and concentration unit, then sending the washing water to a carbonization unitB, introducing the washing water to a filtering and washing unit, separating out aluminum hydroxide and liquid sodium carbonate in the filtering and washing unit, drying and burning aluminum hydroxideto obtain aluminum oxide, and making liquid sodium carbonate pass through n evaporation and concentration units and an evaporation and drying unit to obtain sodium carbonate.
本发明公开了一种利用赤泥生产纯碱、氧化铝、掺混水泥的工艺。一种利用赤泥生产纯碱、氧化铝、掺混水泥的工艺，赤泥稀释得到稀赤泥，将稀赤泥送入a级水洗单元，再将送入碳化单元A反应，将反应后的稀赤泥送入b级水洗单元洗涤，再将稀赤泥送入过滤单元，过滤后得到低钠赤泥，低钠赤泥与石灰混合磨制得到掺混水泥；过程中，收集b级水洗单元中洗过赤泥的洗水，送入a级水洗单元中的第a级水洗；收集a级水洗单元中洗过赤泥的洗水，一路送至m级蒸发浓缩单元，再送入碳化单元B，再通往过滤洗涤单元，在过滤洗涤单元处分离出氢氧化铝、纯碱液，将氢氧化铝烘干煅烧得到氧化铝，纯碱液经过n级蒸发浓缩单元、蒸发干燥单元得到纯碱。
The invention discloses a process for producing sodium carbonate, aluminum oxide and blended cement from red mud. The process comprises the following steps: diluting red mud to obtain diluted red mud,feeding the diluted red mud into an a-stage washing unit, feeding the diluted red mud into a carbonization unit A for reaction, feeding the reacted diluted red mud into a b-stage washing unit for washing, feeding the diluted red mud into a filtering unit, filtering to obtain low-sodium red mud, and mixing and grinding the low-sodium red mud and lime to obtain blended cement; in the process, collecting washing water that is used for washing red mud in the b-stage washing unit, feeding the washing water into the a-stage washing unit for a-stage washing; collecting the washing water that is usedfor washing the red mud in the a-stage washing unit; delivering one part of the washing water to an m-stage evaporation and concentration unit, then sending the washing water to a carbonization unitB, introducing the washing water to a filtering and washing unit, separating out aluminum hydroxide and liquid sodium carbonate in the filtering and washing unit, drying and burning aluminum hydroxideto obtain aluminum oxide, and making liquid sodium carbonate pass through n evaporation and concentration units and an evaporation and drying unit to obtain sodium carbonate.
本发明公开了一种利用赤泥生产纯碱、氧化铝、掺混水泥的工艺。一种利用赤泥生产纯碱、氧化铝、掺混水泥的工艺，赤泥稀释得到稀赤泥，将稀赤泥送入a级水洗单元，再将送入碳化单元A反应，将反应后的稀赤泥送入b级水洗单元洗涤，再将稀赤泥送入过滤单元，过滤后得到低钠赤泥，低钠赤泥与石灰混合磨制得到掺混水泥；过程中，收集b级水洗单元中洗过赤泥的洗水，送入a级水洗单元中的第a级水洗；收集a级水洗单元中洗过赤泥的洗水，一路送至m级蒸发浓缩单元，再送入碳化单元B，再通往过滤洗涤单元，在过滤洗涤单元处分离出氢氧化铝、纯碱液，将氢氧化铝烘干煅烧得到氧化铝，纯碱液经过n级蒸发浓缩单元、蒸发干燥单元得到纯碱。
Process for producing sodium carbonate, aluminum oxide and blended cement from red mud
一种利用赤泥生产纯碱、氧化铝、掺混水泥的工艺
TAO YUMIN (author)
2020-11-20
Patent
Electronic Resource
Chinese
IPC:
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
C01D
Verbindungen der Alkalimetalle, d.h. des Lithiums, Natriums, Kaliums, Rubidiums, Cäsiums oder Franciums
,
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
/
C04B
Kalk
,
LIME
COMPOSITE OXIDE, CEMENT ADMIXTURE OR BLENDED CEMENT CONTAINING COMPOSITE OXIDE, AND CONCRETE
| European Patent Office | 2025