Article(id=1305178384032621568, tenantId=1146029695717560320, journalId=1146120122248306696, issueId=1305178373467169689, articleNumber=null, orderNo=null, doi=10.13355/j.cnki.sfyj.2026.03.007, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1769702400000, receivedDateStr=2026-01-30, revisedDate=1772640000000, revisedDateStr=2026-03-05, acceptedDate=null, acceptedDateStr=null, onlineDate=1789108375795, onlineDateStr=2026-09-11, pubDate=1781884800000, pubDateStr=2026-06-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789108375795, onlineIssueDateStr=2026-09-11, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789108375795, creator=13701087609, updateTime=1789108375795, updator=13701087609, issue=Issue{id=1305178373467169689, tenantId=1146029695717560320, journalId=1146120122248306696, year='2026', volume='45', issue='3', pageStart='273', pageEnd='454', issueExtLink='null', onlineDate='null', pubDate='1781884800000', pubDateStr='2026-06-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1789108373275, creator='13701087609', updateTime=1789108489171, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1305178859612168540, tenantId=1146029695717560320, journalId=1146120122248306696, issueId=1305178373467169689, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1305178859612168541, tenantId=1146029695717560320, journalId=1146120122248306696, issueId=1305178373467169689, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=324, endPage=330, ext={EN=ArticleExt(id=1305178384376553472, articleId=1305178384032621568, tenantId=1146029695717560320, journalId=1146120122248306696, language=EN, title=Extraction of Germanium from Lignite Ash by a New Process of Alkali Fusion Activation－Acid Leaching, columnId=1152626641181700664, journalTitle=Hydrometallurgy of China, columnName=Experiment Research, runingTitle=null, highlight=null, articleAbstract=

Germanium in lignite ash mainly exists in Ge—O—Si bonded state, vitreous encapsulated state and iron oxide adsorbed state. The traditional acid leaching method is difficult to destroy the structure of highly stable Ge—O—Si bond and dense encapsulated vitreous body, resulting in less than 50% germanium leaching rate and low resource recovery rate. Based on the comparison of three process routes of lignite ash direct acid leaching, roasting－acid leaching, alkali fusion activation－acid leaching and two leaching systems of sulfuric acid or hydrochloric acid, the process route of extracting germanium from lignite ash by high temperature alkali fusion pretreatment－acid leaching process was proposed and studied. The effects of alkali fusion temperature, mass ratio of material to alkali and alkali fusion holding time on the leaching rate of germanium in lignite ash were investigated, and the leaching effects of sulfuric acid and hydrochloric acid on alkali fusion activation products were compared. The results show that the leaching performance of germanium can be significantly improved by breaking the Ge—O—Si bond by alkali fusion and converting insoluble silicate into soluble sodium salt, and then the efficient leaching of germanium can be realized by conventional acid leaching. Under the conditions of alkali fusion temperature of 600 ℃, mass ratio of material to alkali of 1/1.8 and alkali fusion time of 1 h, the main spherical structure of lignite ash is destroyed, and the encapsulated substances in alkali fusion products are released. When hydrochloric acid or sulfuric acid leaching systems are used, the leaching rates of germanium are 86.37% and 93.98%, respectively. This technology can realize the efficient leaching of germanium in lignite ash, which can provide a new technical approach for the resource utilization of high-silicon germanium-containing secondary materials and the efficient recovery of strategic metal germanium.

, authors=Te ZHANG^{1, 2}, Zeyu DU¹, Zhigan DENG¹, Weicheng WANG¹, Linxin LEI¹, Chaobo ZHANG², Guang FU², authorsList=Te ZHANG, Zeyu DU, Zhigan DENG, Weicheng WANG, Linxin LEI, Chaobo ZHANG, Guang FU, authorCompany=null, correspAuthors=Zhigan DENG, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1305178384766623745, articleId=1305178384032621568, tenantId=1146029695717560320, journalId=1146120122248306696, language=CN, title=碱熔活化—酸浸新工艺提取褐煤灰中的锗, columnId=1152626641328501305, journalTitle=湿法冶金, columnName=试验研究, runingTitle=null, highlight=null, articleAbstract=

褐煤灰中的锗主要以Ge—O—Si键合态、玻璃体包裹态和铁氧化物吸附态赋存，传统酸浸法难以破坏高稳定性的Ge—O—Si键和致密包裹的玻璃体等结构，导致锗浸出率不足50%，资源回收率低。在对比褐煤灰直接酸浸、焙烧—酸浸、碱熔活化—酸浸3种工艺路线，以及硫酸或盐酸2种浸出体系提取锗效果基础上，提出并研究了采用褐煤灰高温碱熔预处理—酸浸工艺提取锗的工艺路线，考察了碱熔温度、料碱质量比及碱熔保温时间对褐煤灰中锗浸出率的影响，并对比了硫酸和盐酸对碱熔活化产物的浸出效果。研究结果表明：通过碱熔破坏Ge—O—Si键，将难溶硅酸盐转化为可溶性钠盐，可显著改善锗的浸出性能，再通过常规酸浸可实现锗的高效浸出；在碱熔温度为600 ℃、料碱质量比为1/1.8、碱熔时间为1 h条件下，褐煤灰成分主要球形结构被破坏，碱熔产物中被包裹物质得以释放，采用盐酸或硫酸2种浸出体系时，锗浸出率分别达86.37%和93.98%。该技术能实现褐煤灰中锗的高效浸出，可为高硅含锗二次物料的资源化利用和战略金属锗的高效回收提供一种新的技术途径。

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