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Harmless combined treatment method for industrial aluminum ash, ardealite and carbon dioxide
The invention discloses a harmless combined treatment method for industrial aluminum ash, phosphogypsum and carbon dioxide, which comprises the following steps: S1, putting secondary aluminum ash into a sodium hydroxide aqueous solution, collecting tail gas, and filtering; s2, slowly introducing CO2 gas into the filtrate in the S1, and washing and filtering for three times to obtain filter residue aluminum hydroxide; s3, adding ardealite into a mixed solution of filtrates washed for the second time and filtrates washed for the third time in the step S2, stirring for reaction, washing and filtering, and evaporating and crystallizing the filtrates to obtain sodium sulfate; s4, calcining the filter residues in the step S3, and introducing generated gas into the step S2; s5, carrying out mixed reaction on the calcined solid and the tail gas collected in the S1, and collecting the reacted tail gas again and introducing the tail gas into the step S4; and S6, reacting the solid substance in the step S5 with the first washing filtrate in the step S2, washing and filtering, returning the filtrate to the step S1, and repeating the step S4 on the filter residue. According to the invention, raw materials, intermediate products, heat and the like are fully utilized, and harmless combined treatment in a closed circulation mode is realized.
本发明公开了一种工业铝灰、磷石膏和二氧化碳无害化联合处理的方法，包括：S1、将二次铝灰投入氢氧化钠水溶液中，收集尾气，过滤；S2、在S1的滤液中缓慢通入CO2气体，进行3次洗涤过滤得到滤渣氢氧化铝；S3、在S2的第2次、第3次洗涤滤液的混合液中加入磷石膏，搅拌反应，经洗涤、过滤后，滤液经蒸发结晶得到硫酸钠；S4、将S3的滤渣煅烧，产生的气体通入S2；S5、煅烧后的固体物与S1收集的尾气混合反应，反应后的尾气再次收集并通入S4；S6、步骤S5中反应的固体物与S2的第1次洗涤滤液反应，洗涤过滤后滤液回到S1，滤渣重复S4。本发明将原料、中间产物、热量等充分利用，实现了闭合循环模式的无害化联合处理。
Harmless combined treatment method for industrial aluminum ash, ardealite and carbon dioxide
The invention discloses a harmless combined treatment method for industrial aluminum ash, phosphogypsum and carbon dioxide, which comprises the following steps: S1, putting secondary aluminum ash into a sodium hydroxide aqueous solution, collecting tail gas, and filtering; s2, slowly introducing CO2 gas into the filtrate in the S1, and washing and filtering for three times to obtain filter residue aluminum hydroxide; s3, adding ardealite into a mixed solution of filtrates washed for the second time and filtrates washed for the third time in the step S2, stirring for reaction, washing and filtering, and evaporating and crystallizing the filtrates to obtain sodium sulfate; s4, calcining the filter residues in the step S3, and introducing generated gas into the step S2; s5, carrying out mixed reaction on the calcined solid and the tail gas collected in the S1, and collecting the reacted tail gas again and introducing the tail gas into the step S4; and S6, reacting the solid substance in the step S5 with the first washing filtrate in the step S2, washing and filtering, returning the filtrate to the step S1, and repeating the step S4 on the filter residue. According to the invention, raw materials, intermediate products, heat and the like are fully utilized, and harmless combined treatment in a closed circulation mode is realized.
本发明公开了一种工业铝灰、磷石膏和二氧化碳无害化联合处理的方法，包括：S1、将二次铝灰投入氢氧化钠水溶液中，收集尾气，过滤；S2、在S1的滤液中缓慢通入CO2气体，进行3次洗涤过滤得到滤渣氢氧化铝；S3、在S2的第2次、第3次洗涤滤液的混合液中加入磷石膏，搅拌反应，经洗涤、过滤后，滤液经蒸发结晶得到硫酸钠；S4、将S3的滤渣煅烧，产生的气体通入S2；S5、煅烧后的固体物与S1收集的尾气混合反应，反应后的尾气再次收集并通入S4；S6、步骤S5中反应的固体物与S2的第1次洗涤滤液反应，洗涤过滤后滤液回到S1，滤渣重复S4。本发明将原料、中间产物、热量等充分利用，实现了闭合循环模式的无害化联合处理。
Harmless combined treatment method for industrial aluminum ash, ardealite and carbon dioxide
一种工业铝灰、磷石膏和二氧化碳无害化联合处理的方法
YIN CAINENG (author) / SU YULING (author) / XU SHUNTAO (author) / ZHANG WUMIN (author) / HU YU (author) / SHIROGANE TOKU (author) / A GUANGQIANG (author)
2024-03-22
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
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