Method for removing fluoride in aluminum ash by external field strengthening means
The invention provides a method for removing fluoride in aluminum ash by an external field strengthening means. The method comprises the following steps that (1), dried raw material aluminum ash is ball-milled to below 100 microns; (2), a sodium hydroxide solution is taken as a leaching solution, an...
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| creator | TIAN DENGCHAO GUO QIANG GAO QIN LI YONGLI LIU YUFENG FU MINGBO |
| description | The invention provides a method for removing fluoride in aluminum ash by an external field strengthening means. The method comprises the following steps that (1), dried raw material aluminum ash is ball-milled to below 100 microns; (2), a sodium hydroxide solution is taken as a leaching solution, and the leaching solution is uniformly mixed with the fine aluminum ash obtained in the step (1) to obtain mixed alkaline slurry; (3), leaching reaction is carried out on the mixed alkaline slurry obtained in the step (2) under microwave and/or ultrasonic conditions; (4), the slurry obtained in the step (3) is dehydrated and filtered to obtain a leaching solution and leaching slag; and (5), lime is added into the leaching solution obtained in the step (4) to precipitate the fluorine. According tothe method for removing the fluoride in the aluminum ash by the external field strengthening means, the structure of the micro/indissolvable fluoride is destroyed by utilizing the ultrasonic wave andmicrowave assisted strengt |
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The method comprises the following steps that (1), dried raw material aluminum ash is ball-milled to below 100 microns; (2), a sodium hydroxide solution is taken as a leaching solution, and the leaching solution is uniformly mixed with the fine aluminum ash obtained in the step (1) to obtain mixed alkaline slurry; (3), leaching reaction is carried out on the mixed alkaline slurry obtained in the step (2) under microwave and/or ultrasonic conditions; (4), the slurry obtained in the step (3) is dehydrated and filtered to obtain a leaching solution and leaching slag; and (5), lime is added into the leaching solution obtained in the step (4) to precipitate the fluorine. According tothe method for removing the fluoride in the aluminum ash by the external field strengthening means, the structure of the micro/indissolvable fluoride is destroyed by utilizing the ultrasonic wave andmicrowave assisted strengt</description><language>chi ; eng</language><subject>CHEMISTRY ; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS ; FERROUS OR NON-FERROUS ALLOYS ; INORGANIC CHEMISTRY ; METALLURGY ; PRETREATMENT OF RAW MATERIALS ; PRODUCTION AND REFINING OF METALS ; TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><creationdate>2021</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20210326&DB=EPODOC&CC=CN&NR=112553471A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25555,76308</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20210326&DB=EPODOC&CC=CN&NR=112553471A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>TIAN DENGCHAO</creatorcontrib><creatorcontrib>GUO QIANG</creatorcontrib><creatorcontrib>GAO QIN</creatorcontrib><creatorcontrib>LI YONGLI</creatorcontrib><creatorcontrib>LIU YUFENG</creatorcontrib><creatorcontrib>FU MINGBO</creatorcontrib><title>Method for removing fluoride in aluminum ash by external field strengthening means</title><description>The invention provides a method for removing fluoride in aluminum ash by an external field strengthening means. The method comprises the following steps that (1), dried raw material aluminum ash is ball-milled to below 100 microns; (2), a sodium hydroxide solution is taken as a leaching solution, and the leaching solution is uniformly mixed with the fine aluminum ash obtained in the step (1) to obtain mixed alkaline slurry; (3), leaching reaction is carried out on the mixed alkaline slurry obtained in the step (2) under microwave and/or ultrasonic conditions; (4), the slurry obtained in the step (3) is dehydrated and filtered to obtain a leaching solution and leaching slag; and (5), lime is added into the leaching solution obtained in the step (4) to precipitate the fluorine. 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The method comprises the following steps that (1), dried raw material aluminum ash is ball-milled to below 100 microns; (2), a sodium hydroxide solution is taken as a leaching solution, and the leaching solution is uniformly mixed with the fine aluminum ash obtained in the step (1) to obtain mixed alkaline slurry; (3), leaching reaction is carried out on the mixed alkaline slurry obtained in the step (2) under microwave and/or ultrasonic conditions; (4), the slurry obtained in the step (3) is dehydrated and filtered to obtain a leaching solution and leaching slag; and (5), lime is added into the leaching solution obtained in the step (4) to precipitate the fluorine. According tothe method for removing the fluoride in the aluminum ash by the external field strengthening means, the structure of the micro/indissolvable fluoride is destroyed by utilizing the ultrasonic wave andmicrowave assisted strengt</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS FERROUS OR NON-FERROUS ALLOYS INORGANIC CHEMISTRY METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | Method for removing fluoride in aluminum ash by external field strengthening means |
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