Article(id=1172169533902148220, tenantId=1146029695717560320, journalId=1146120122248306696, issueId=1172169457649697117, articleNumber=1009-2617(2025)04-0546-09, orderNo=null, doi=10.13355/j.cnki.sfyj.2025.04.014, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1739030400000, receivedDateStr=2025-02-09, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1757396594737, onlineDateStr=2025-09-09, pubDate=1755619200000, pubDateStr=2025-08-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1757396594737, onlineIssueDateStr=2025-09-09, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1757396594737, creator=13701087609, updateTime=1757396594737, updator=13701087609, issue=Issue{id=1172169457649697117, tenantId=1146029695717560320, journalId=1146120122248306696, year='2025', volume='44', issue='4', pageStart='433', pageEnd='581', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1757396576558, creator=13701087609, updateTime=1757401820494, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1172191452378547078, tenantId=1146029695717560320, journalId=1146120122248306696, issueId=1172169457649697117, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1172191452378547079, tenantId=1146029695717560320, journalId=1146120122248306696, issueId=1172169457649697117, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=546, endPage=554, ext={EN=ArticleExt(id=1172169534212526721, articleId=1172169533902148220, tenantId=1146029695717560320, journalId=1146120122248306696, language=EN, title=Alkali Roasting—Water Leaching of Aluminum and Defluorination from Secondary Aluminum Dross, columnId=1152626641181700664, journalTitle=Hydrometallurgy of China, columnName=Experiment Research, runingTitle=null, highlight=null, articleAbstract=
Secondary aluminum dross (SAD) is a hazardous waste generated during aluminum resource recycling,containing aluminum,alumina,aluminum nitride,fluorides,chlorides,and other components. It exhibits strong chemical reactivity and leaching toxicity,making its resource utilization and environmentally friendly recovery highly significant. The denitrification of SAD by alkaline roasting,the extraction of aluminum from the roasted residue via water leaching,and the defluorination of the leachate using CaCl2 were studied.The phase transformation,elemental distribution,and microstructure of the roasted dross were analyzed by XRD and SEM-EDS.The results show that under optimal alkaline roasting conditions of m(NaOH)∶m(SAD)=1.1,roasting temperature of 800 ℃,and roasting time of 120 min,the nitrogen removal rate can reach 98.77%.Under the best water leaching conditions of leaching temperature of 70 ℃,liquid volume to solid mass ratio of 14∶1,and leaching time of 80 min,the aluminum leaching efficiency is 91.83%,with Al,AlN,and Al2O3 in the roasted residue being mostly converted into soluble NaAlO2.For fluorine removal from the leachate,CaCl2 was employed.The results indicate that under the conditions of n(Ca2+)∶n(F-) = 0.7,reaction temperature of 50 ℃,and reaction time of 90 min,the defluorination rate can reach 94.87%. The fluorine removal residue primarily consists of CaF2 and a small amount of unreacted CaCl2,which can be used as a flux in metal smelting.The process achieves efficient aluminum extraction from SAD while removing nitrogen and fluorine,fulfilling the objectives of harmless treatment and resource recovery.
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二次铝灰(SAD)是铝资源回收过程中产生的危险废物,其中含铝、氧化铝、氮化铝、氟化物、氯盐等成分,具有较强的化学反应性及浸出毒性,其资源化及无害化回收利用研究具有重要意义。研究采用碱化焙烧方式脱除二次铝灰中的氮,再用水浸法提取焙烧渣中的铝,同时用CaCl2脱除浸出液中的氟。通过XRD、SEM-EDS分析了焙烧后铝灰的物相变化、元素分布及微观形貌。结果表明:在m(NaOH)∶m(SAD)=1.1、焙烧温度800 ℃、焙烧时间120 min的最佳碱化焙烧工艺条件下,脱氮率为98.77%;在浸出温度70 ℃、液固体积质量比14∶1、浸出时间80 min最佳水浸条件下,铝浸出率为91.83%,焙烧渣中的Al、AlN及Al2O3基本转化为易溶态的NaAlO2;针对浸出液中的F-,采用CaCl2进行脱氟处理,在n(Ca2+)∶n(F-)=0.7、反应温度50 ℃、反应时间90 min条件下,脱氟率为94.87%,脱氟渣主要物相为CaF2及少量未反应CaCl2,可用作金属冶炼助熔剂。该工艺实现了二次铝灰中铝的高效提取及氮、氟元素的脱除,达到了无害化及资源化回收目的。
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刘文(1998—),男,硕士研究生,主要研究方向为固体废物资源化利用。
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刘文(1998—),男,硕士研究生,主要研究方向为固体废物资源化利用。
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刘文(1998—),男,硕士研究生,主要研究方向为固体废物资源化利用。
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XRD Spectrum of secondary aluminum dross, figureFileSmall=bfwZKd/41spoCRE1UoDMAg==, figureFileBig=3dpQ67f+jMjdKpYSA33Rwg==, tableContent=null), ArticleFig(id=1172190243538195011, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图1, caption=
二次铝灰的XRD图谱, figureFileSmall=bfwZKd/41spoCRE1UoDMAg==, figureFileBig=3dpQ67f+jMjdKpYSA33Rwg==, tableContent=null), ArticleFig(id=1172190243617886788, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.2, caption=
SEM-EDS analysis results of secondary aluminum dross, figureFileSmall=/X3iwOEKictNdw+wlWOxuA==, figureFileBig=/NRVf1hWPv0prChjcx/SWw==, tableContent=null), ArticleFig(id=1172190243684995653, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图2, caption=
二次铝灰的SEM-EDS分析结果, figureFileSmall=/X3iwOEKictNdw+wlWOxuA==, figureFileBig=/NRVf1hWPv0prChjcx/SWw==, tableContent=null), ArticleFig(id=1172190243781464646, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.3, caption=
ΔG of various reactions in alkaline roasting at different temperatures, figureFileSmall=pHLDgisGYF7czCdIqbsErA==, figureFileBig=XRGLHhGmdT+v1gYS7Cn1xA==, tableContent=null), ArticleFig(id=1172190243852767815, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图3, caption=
不同温度下碱化焙烧各反应的ΔG, figureFileSmall=pHLDgisGYF7czCdIqbsErA==, figureFileBig=XRGLHhGmdT+v1gYS7Cn1xA==, tableContent=null), ArticleFig(id=1172190243919876680, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.4, caption=
Effects of m(NaOH)∶m(SAD) on denitrification rate and aluminum leaching rate of secondary aluminum dross, figureFileSmall=fF+akk0D+H/xJ/xtDQmdng==, figureFileBig=oiM/he9TrdLNJHjPR8FrVA==, tableContent=null), ArticleFig(id=1172190243978596937, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图4, caption=
m(NaOH)∶m(SAD)对二次铝灰脱氮率及铝浸出率的影响, figureFileSmall=fF+akk0D+H/xJ/xtDQmdng==, figureFileBig=oiM/he9TrdLNJHjPR8FrVA==, tableContent=null), ArticleFig(id=1172190244049900106, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.5, caption=
Effects of roasting temperature on denitrification rate and aluminum leaching rate of secondary aluminum dross, figureFileSmall=BmJ1hNPFqMcZqmfpsYHojw==, figureFileBig=r9YHWmDHGVl4rzYa3JTPhw==, tableContent=null), ArticleFig(id=1172190244137980491, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图5, caption=
焙烧温度对二次铝灰脱氮率及铝浸出率的影响, figureFileSmall=BmJ1hNPFqMcZqmfpsYHojw==, figureFileBig=r9YHWmDHGVl4rzYa3JTPhw==, tableContent=null), ArticleFig(id=1172190244217672268, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.6, caption=
Effects of roasting time on denitrification rate and aluminum leaching rate of secondary aluminum dross, figureFileSmall=D3IvOI/05qk0ug+EoBuzMg==, figureFileBig=7aT8ZB+DgRxG7wz9jskV2g==, tableContent=null), ArticleFig(id=1172190244288975437, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图6, caption=
焙烧时间对二次铝灰脱氮率及铝浸出率的影响, figureFileSmall=D3IvOI/05qk0ug+EoBuzMg==, figureFileBig=7aT8ZB+DgRxG7wz9jskV2g==, tableContent=null), ArticleFig(id=1172190244364472910, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.7, caption=
Effect of leaching temperature on leaching rate of aluminum, figureFileSmall=WuBs0Bhk1Rq0l6L343dHLg==, figureFileBig=lxsuWgE1owOhZ0RXnYkHCw==, tableContent=null), ArticleFig(id=1172190244439970383, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图7, caption=
浸出温度对铝浸出率的影响, figureFileSmall=WuBs0Bhk1Rq0l6L343dHLg==, figureFileBig=lxsuWgE1owOhZ0RXnYkHCw==, tableContent=null), ArticleFig(id=1172190244511273552, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.8, caption=
Effect of liquid volume to solid mass ratio on leaching rate of aluminum, figureFileSmall=iMfAcumSZNpCk4aHxRWlcw==, figureFileBig=/GE1Kr65qCrK+L0Dgn+bSg==, tableContent=null), ArticleFig(id=1172190244578382417, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图8, caption=
液固体积质量比对铝浸出率的影响, figureFileSmall=iMfAcumSZNpCk4aHxRWlcw==, figureFileBig=/GE1Kr65qCrK+L0Dgn+bSg==, tableContent=null), ArticleFig(id=1172190244658074194, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.9, caption=
Effect of leaching time on leaching rate of aluminum, figureFileSmall=xlOctsUPzpMGztq4P9CnbA==, figureFileBig=eal70XP6qp8iWGjKPnIthQ==, tableContent=null), ArticleFig(id=1172190244729377363, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图9, caption=
浸出时间对铝浸出率的影响, figureFileSmall=xlOctsUPzpMGztq4P9CnbA==, figureFileBig=eal70XP6qp8iWGjKPnIthQ==, tableContent=null), ArticleFig(id=1172190244804874836, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.10, caption=
GC analysis result of gas produced after roasting, figureFileSmall=aJbRMZsoLBCMkFFBjQKd1g==, figureFileBig=NL3V/DswvYt426BzEDOrhA==, tableContent=null), ArticleFig(id=1172190244876178005, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图10, caption=
焙烧后产生气体的GC分析结果, figureFileSmall=aJbRMZsoLBCMkFFBjQKd1g==, figureFileBig=NL3V/DswvYt426BzEDOrhA==, tableContent=null), ArticleFig(id=1172190244939092566, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.11, caption=
Effect of n(Ca2+)∶n(F-) on defluorination rate, figureFileSmall=ebIdG92vzMZ/T25qNsa5FQ==, figureFileBig=0OETuDJaz2Y0j1A0DIEV/Q==, tableContent=null), ArticleFig(id=1172190245018784343, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图11, caption=
n(Ca2+)∶n(F-)对脱氟率的影响, figureFileSmall=ebIdG92vzMZ/T25qNsa5FQ==, figureFileBig=0OETuDJaz2Y0j1A0DIEV/Q==, tableContent=null), ArticleFig(id=1172190245098476120, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.12, caption=
Effect of reaction temperature on defluorination rate, figureFileSmall=hHnXVtLBVjiRtNoHf+8a0Q==, figureFileBig=eUXfjbhSDX50sq6crX0WOA==, tableContent=null), ArticleFig(id=1172190245161390681, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图12, caption=
反应温度对脱氟率的影响, figureFileSmall=hHnXVtLBVjiRtNoHf+8a0Q==, figureFileBig=eUXfjbhSDX50sq6crX0WOA==, tableContent=null), ArticleFig(id=1172190245228499546, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.13, caption=
Effect of reaction time on defluorination rate, figureFileSmall=neK58nQbiWnGZAy35WXu2Q==, figureFileBig=yH/Ku/CyY6mIEqX5vSr4RA==, tableContent=null), ArticleFig(id=1172190245287219803, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图13, caption=
反应时间对脱氟率的影响, figureFileSmall=neK58nQbiWnGZAy35WXu2Q==, figureFileBig=yH/Ku/CyY6mIEqX5vSr4RA==, tableContent=null), ArticleFig(id=1172190245358522972, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.14, caption=
XRD pattern of roasted residue, figureFileSmall=R/0UXgI+6gPZBghJQjF+qw==, figureFileBig=6nbP12w5N07LeLiJifNY9A==, tableContent=null), ArticleFig(id=1172190245421437533, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图14, caption=
焙烧渣的XRD图谱, figureFileSmall=R/0UXgI+6gPZBghJQjF+qw==, figureFileBig=6nbP12w5N07LeLiJifNY9A==, tableContent=null), ArticleFig(id=1172190245484352094, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.15, caption=
SEM-EDS analysis results of roasted residue, figureFileSmall=eunjRmLny1QOtnzqUgirig==, figureFileBig=xkPgiThlFPqUxv/fA+N7hQ==, tableContent=null), ArticleFig(id=1172190245551460959, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图15, caption=
焙烧渣的SEM-EDS分析结果, figureFileSmall=eunjRmLny1QOtnzqUgirig==, figureFileBig=xkPgiThlFPqUxv/fA+N7hQ==, tableContent=null), ArticleFig(id=1172190245622764128, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Fig.16, caption=
XRD pattern of defluorination residue, figureFileSmall=spEHhB2DsofeQSy9tu+U+Q==, figureFileBig=knVwc+ZseIvL5CWSQKmumA==, tableContent=null), ArticleFig(id=1172190245702455905, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=图16, caption=
脱氟渣的XRD图谱, figureFileSmall=spEHhB2DsofeQSy9tu+U+Q==, figureFileBig=knVwc+ZseIvL5CWSQKmumA==, tableContent=null), ArticleFig(id=1172190245777953378, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Table 1, caption=
Main chemical composition of secondary aluminum dross %
, figureFileSmall=null, figureFileBig=null, tableContent=
| Al | O | N | C | Mg | Ca | Fe | Na | F | Cl |
| 44.67 | 26.44 | 4.9 | 4.41 | 4.23 | 3.42 | 3.57 | 1.83 | 0.48 | 3.44 |
), ArticleFig(id=1172190245840867939, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=表1, caption=
二次铝灰的主要化学组成
, figureFileSmall=null, figureFileBig=null, tableContent=
| Al | O | N | C | Mg | Ca | Fe | Na | F | Cl |
| 44.67 | 26.44 | 4.9 | 4.41 | 4.23 | 3.42 | 3.57 | 1.83 | 0.48 | 3.44 |
), ArticleFig(id=1172190245933142628, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Table 2, caption=
Main composition and relative volume fraction of gas produced after roasting %
, figureFileSmall=null, figureFileBig=null, tableContent=
| N2 | O2 | CO2 | CO | H2 |
| 82.42 | 10.51 | 6.78 | 0.25 | 0.01 |
), ArticleFig(id=1172190246004445797, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=表2, caption=
焙烧后气体主要成分及相对体积分数
, figureFileSmall=null, figureFileBig=null, tableContent=
| N2 | O2 | CO2 | CO | H2 |
| 82.42 | 10.51 | 6.78 | 0.25 | 0.01 |
), ArticleFig(id=1172190246079943270, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=EN, label=Table 3, caption=
Main composition of leaching solution mg/L
, figureFileSmall=null, figureFileBig=null, tableContent=
| Al3+ | Na+ | Ca2+ | Fe2+ | Mg2+ | F- |
| 14 845 | 21 322 | 10.67 | 0.19 | 0.05 | 462.8 |
), ArticleFig(id=1172190246147052135, tenantId=1146029695717560320, journalId=1146120122248306696, articleId=1172169533902148220, language=CN, label=表3, caption=
浸出液的主要组成
, figureFileSmall=null, figureFileBig=null, tableContent=
| Al3+ | Na+ | Ca2+ | Fe2+ | Mg2+ | F- |
| 14 845 | 21 322 | 10.67 | 0.19 | 0.05 | 462.8 |
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