Article(id=1240631730944660286, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1240631729627648823, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2024.03.024, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1702051200000, receivedDateStr=2023-12-09, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1773719254479, onlineDateStr=2026-03-17, pubDate=1717171200000, pubDateStr=2024-06-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773719254479, onlineIssueDateStr=2026-03-17, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773719254479, creator=13701087609, updateTime=1773719254479, updator=13701087609, issue=Issue{id=1240631729627648823, tenantId=1146029695717560320, journalId=1235980550691926019, year='2024', volume='44', issue='3', pageStart='1', pageEnd='181', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773719254166, creator=13701087609, updateTime=1773724083554, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1240651985603580488, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1240631729627648823, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1240651985603580489, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1240631729627648823, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=111, endPage=115, ext={EN=ArticleExt(id=1240631731246650180, articleId=1240631730944660286, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Leaching Behavior and Kinetics of Scandium and Yttrium from Bayer Red Mud, columnId=1236276106727321817, journalTitle=Mining and Metallurgical Engineering, columnName=METALLURGY, runingTitle=null, highlight=null, articleAbstract=
A two-step acid leaching process was used to leach scandium and yttrium from red mud. Phosphoric acid was used in the first stage of leaching to achieve dealkalization, desilication and enrichment of rare earth elements (scandium and yttrium). Then, the leaching residue was leached with sulfuric acid in the second stage. The effects of sulfuric acid concentration, liquid-solid ratio, reaction temperature and reaction time on the leaching process of scandium and yttrium were investigated, and the leaching kinetics was also analyzed. It is found that leaching of red mud with phosphoric acid can bring better dealkalization and desilication effect, showing the leaching rates of K, Na and Si at 75.62%, 87.82% and 80.25%, respectively. Then, in the second stage of leaching process with sulfuric acid concentration of 2.5 mol/L and liquid-solid ratio of 7∶1, reaction runs at 70 ℃ for 45 min, leading to the average leaching rates of Sc and Y up to 74.49% and 80.02%, respectively. It is shown that the leaching processes of Sc and Y with sulfuric acid follow the liquid-solid reaction model, which is controlled by diffusion, and the apparent reaction activation energies are calculated to be 18.50 kJ/mol and 16.74 kJ/mol, respectively.
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采用两步酸浸法浸出赤泥中的钪和钇,用磷酸对赤泥进行一段酸浸,实现脱碱和脱硅并富集稀土金属钪、钇;用硫酸对磷酸浸出渣进行二段酸浸,考察了硫酸浓度、液固比、反应温度、反应时间对钪、钇浸出过程的影响,并进行了浸出动力学分析。结果表明,赤泥经磷酸浸出后,脱碱和脱硅效果较好,K、Na、Si浸出率分别为75.62%、87.82%、80.25%;在硫酸浓度2.5 mol/L、液固比7∶1、反应温度70 ℃、反应时间45 min条件下进行二段硫酸浸出,Sc、Y平均浸出率分别为74.49%、80.02%。Sc和Y的硫酸浸出过程均符合多相液固区域反应模型,受扩散控制,表观反应活化能分别为18.50 kJ/mol和16.74 kJ/mol。
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1.School of Resources, Environment and Materials, Guangxi University, Nanning 530004, Guangxi, China
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1.广西大学 资源环境与材料学院,广西 南宁 530004
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黄魁(1981—),男,广西柳州人,博士,副教授,主要从事固体废弃物无害化处理与资源化利用研究。E-mail:khuang@gxu.edu.cn
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黄魁(1981—),男,广西柳州人,博士,副教授,主要从事固体废弃物无害化处理与资源化利用研究。E-mail:khuang@gxu.edu.cn
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钇的浸出动力学拟合曲线, figureFileSmall=YxUCJsLyRXAxu9tCGlqM4Q==, figureFileBig=tLFgBwUuLu77tLtzGoj2vg==, tableContent=null), ArticleFig(id=1240651364360048927, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1240631730944660286, language=EN, label=null, caption=null, figureFileSmall=DwDmMLE35gBNkrmqBR17iQ==, figureFileBig=KwEfEDIP8EB3e/XXx6jA/w==, tableContent=null), ArticleFig(id=1240651364469100838, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1240631730944660286, language=CN, label=图12, caption=
钪浸出的Arrihenius拟合曲线, figureFileSmall=DwDmMLE35gBNkrmqBR17iQ==, figureFileBig=KwEfEDIP8EB3e/XXx6jA/w==, tableContent=null), ArticleFig(id=1240651364548792620, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1240631730944660286, language=EN, label=null, caption=null, figureFileSmall=Qqw4DOLdEXIupWbJe95FYg==, figureFileBig=3tuNSW//jiCylebci30imA==, tableContent=null), ArticleFig(id=1240651364653650230, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1240631730944660286, language=CN, label=图13, caption=
钇浸出的Arrihenius拟合曲线, figureFileSmall=Qqw4DOLdEXIupWbJe95FYg==, figureFileBig=3tuNSW//jiCylebci30imA==, tableContent=null), ArticleFig(id=1240651364792062267, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1240631730944660286, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| Al | Fe | Ca | K | Na | Si | Ti | Sc1) | Y1) | La1) |
|---|
| 8.37 | 20.16 | 8.57 | 0.22 | 1.33 | 15.20 | 3.33 | 7.8 | 20.6 | 5.1 |
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赤泥原料主要化学成分(质量分数)
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| Al | Fe | Ca | K | Na | Si | Ti | Sc1) | Y1) | La1) |
|---|
| 8.37 | 20.16 | 8.57 | 0.22 | 1.33 | 15.20 | 3.33 | 7.8 | 20.6 | 5.1 |
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| Al | Fe | Ca | K | Na | Si | Ti | Sc | Y | La |
|---|
| 45.18 | 0.75 | 57.76 | 75.62 | 87.82 | 80.25 | 1.07 | 10.34 | 20.62 | 6.29 |
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磷酸浸出过程各元素浸出率
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| Al | Fe | Ca | K | Na | Si | Ti | Sc | Y | La |
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| 45.18 | 0.75 | 57.76 | 75.62 | 87.82 | 80.25 | 1.07 | 10.34 | 20.62 | 6.29 |
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| Al | Fe | Ca | K | Na | Si | Ti | Sc1) | Y1) | La1) |
|---|
| 7.03 | 31.51 | 5.54 | 0.12 | 0.34 | 3.98 | 5.25 | 11.7 | 31.8 | 9.3 |
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磷酸浸出后浸出渣主要化学成分(质量分数)
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| Al | Fe | Ca | K | Na | Si | Ti | Sc1) | Y1) | La1) |
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| 7.03 | 31.51 | 5.54 | 0.12 | 0.34 | 3.98 | 5.25 | 11.7 | 31.8 | 9.3 |
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| 温度/℃ | 多相液固区域反应模型 |
|---|
| Sc | Y |
|---|
| 相关系数R2 | n值 | 相关系数R2 | n值 |
|---|
| 40 | 0.998 2 | 0.197 6 | 0.980 6 | 0.231 3 |
| 50 | 0.985 3 | 0.193 4 | 0.967 6 | 0.198 7 |
| 60 | 0.978 0 | 0.175 9 | 0.980 8 | 0.188 6 |
| 70 | 0.991 6 | 0.169 0 | — | — |
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不同拟合曲线相关参数
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| 温度/℃ | 多相液固区域反应模型 |
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| Sc | Y |
|---|
| 相关系数R2 | n值 | 相关系数R2 | n值 |
|---|
| 40 | 0.998 2 | 0.197 6 | 0.980 6 | 0.231 3 |
| 50 | 0.985 3 | 0.193 4 | 0.967 6 | 0.198 7 |
| 60 | 0.978 0 | 0.175 9 | 0.980 8 | 0.188 6 |
| 70 | 0.991 6 | 0.169 0 | — | — |
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