Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Technology for removing fluorine and chlorine from aluminum ash
The invention relates to the field of environmental protection, in particular to a technology for removing fluorine and chlorine from aluminum ash. The preparation method comprises the following steps: drying, grinding and sieving aluminum ash; adding deionized water, leaching, adjusting the pH value to weak acidity, separating, drying filter residues, evaporating and crystallizing leachate, recovering chlorine salt and villiaumite, and recycling condensate; according to the method, fluorine and chlorine elements in the aluminum ash are removed, the leaching rates are 87.68% and 99.02% respectively, the mass fractions of fluorine and chlorine elements in the filter residues are 0.122% and 0.038% respectively, the requirements of impurity elements in the bauxite are met, ammonia gas generated in the leaching process becomes a chemical raw material after being absorbed, the filter residues can also be used as harmless environment-friendly building materials, and the method is suitable for industrial production. And harmless treatment and resource utilization of the aluminum ash are realized.
本发明涉及环保领域，具体关于一种铝灰去除氟、氯的技术；本发明先将铝灰进行干燥、研磨、过筛后；然后加入去离子水，浸出，调节PH值为弱酸性，再经分离后，滤渣烘干，浸出液经蒸发、结晶后，回收氯盐和氟盐，冷凝液回用；本发明实现了去除铝灰中的氟、氯元素，浸出率分别为87.68％和99.02％，滤渣中氟、氯元素的质量分数分别为0.122％和0.038％，达到铝土矿中杂质元素的要求，浸出过程产生的氨气吸收后成为化工原料，滤渣也可以作为无害的环保建材，实现了铝灰的无害化处理和资源化利用。
Technology for removing fluorine and chlorine from aluminum ash
The invention relates to the field of environmental protection, in particular to a technology for removing fluorine and chlorine from aluminum ash. The preparation method comprises the following steps: drying, grinding and sieving aluminum ash; adding deionized water, leaching, adjusting the pH value to weak acidity, separating, drying filter residues, evaporating and crystallizing leachate, recovering chlorine salt and villiaumite, and recycling condensate; according to the method, fluorine and chlorine elements in the aluminum ash are removed, the leaching rates are 87.68% and 99.02% respectively, the mass fractions of fluorine and chlorine elements in the filter residues are 0.122% and 0.038% respectively, the requirements of impurity elements in the bauxite are met, ammonia gas generated in the leaching process becomes a chemical raw material after being absorbed, the filter residues can also be used as harmless environment-friendly building materials, and the method is suitable for industrial production. And harmless treatment and resource utilization of the aluminum ash are realized.
本发明涉及环保领域，具体关于一种铝灰去除氟、氯的技术；本发明先将铝灰进行干燥、研磨、过筛后；然后加入去离子水，浸出，调节PH值为弱酸性，再经分离后，滤渣烘干，浸出液经蒸发、结晶后，回收氯盐和氟盐，冷凝液回用；本发明实现了去除铝灰中的氟、氯元素，浸出率分别为87.68％和99.02％，滤渣中氟、氯元素的质量分数分别为0.122％和0.038％，达到铝土矿中杂质元素的要求，浸出过程产生的氨气吸收后成为化工原料，滤渣也可以作为无害的环保建材，实现了铝灰的无害化处理和资源化利用。
Technology for removing fluorine and chlorine from aluminum ash
一种铝灰去除氟、氯的技术
ZHANG HENG (Autor:in) / LI CHUNPING (Autor:in) / ZHANG MENGYUAN (Autor:in)
04.11.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
/
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
C01B
NON-METALLIC ELEMENTS
,
Nichtmetallische Elemente
/
C01C
Ammoniak
,
AMMONIA
/
C02F
Behandlung von Wasser, Schmutzwasser, Abwasser oder von Abwasserschlamm
,
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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