Article(id=1322559984362181358, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322559901990240737, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1747497600000, receivedDateStr=2025-05-18, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793252472247, onlineDateStr=2026-10-29, pubDate=1774368000000, pubDateStr=2026-03-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793252472247, onlineIssueDateStr=2026-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793252472247, creator=13701087609, updateTime=1793252472247, updator=13701087609, issue=Issue{id=1322559901990240737, tenantId=1146029695717560320, journalId=1225396423026438145, year='2026', volume='46', issue='3', pageStart='1', pageEnd='330', issueExtLink='null', onlineDate='null', pubDate='1774368000000', pubDateStr='2026-03-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793252452609, creator='13701087609', updateTime=1793252731500, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322561071810991099, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322559901990240737, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322561071810991100, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322559901990240737, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=291, endPage=300, ext={EN=ArticleExt(id=1322559984538342127, articleId=1322559984362181358, tenantId=1146029695717560320, journalId=1225396423026438145, language=EN, title=Experimental Study on Reverse Flotation Desilication of Phosphate Using a Novel Cationic Collector, columnId=null, journalTitle=Mining Research and Development, columnName=null, runingTitle=null, highlight=null, articleAbstract=

To effectively solve the problems of poor selectivity and only being suitable for separation in weakly alkaline environment of traditional cationic collectors used in reverse flotation desilication of phosphate, a novel high-efficiency cationic collector SDTQ suitable for separation in weakly acidic environment was developed. Flotation tests were carried out on a siliceous-magnesian phosphate from Guizhou Province using this collector. The results show that when pH=6 and the SDTQ dosage is 25 mg/L, the recovery of pure quartz mineral is close to 100%, while fluorapatite exhibits no obvious floatability. In the flotation of artificial mixed ore, good separation effect of fluorapatite and quartz is achieved at pH=6 with an SDTQ dosage of 100 mg/L. On this basis, using the magnesium-depleted phosphate concentrate pulp at pH=6 as the research object, the collector dosage condition test was carried out. The optimal SDTQ dosage is determined to be 1.1 kg/t. Under this collector dosage, open-circuit tests were carried out. The separation indexes of P₂O₅ grade 35.38%, P₂O₅ recovery 85.41% and acid-insoluble content 5.53% in phosphate concentrate are obtained. Finally, through the closed-circuit process of one roughing, one cleaning and one scavenging, favorable separation indexes are obtained, with P₂O₅ grade of 35.49%, P₂O₅ recovery of 90.31% and acid-insoluble content of 9.81% in phosphate concentrate. Compared with dodecylamine, SDTQ increases the P₂O₅ grade of phosphate concentrate by 2.05 percentage points and the recovery by 10.02 percentage points. The measurement results of Zeta potential and contact angle show that SDTQ is selectively adsorbed on the quartz surface through electrostatic interaction, and the enhanced hydrophobicity difference between quartz and fluorapatite is the key mechanism to achieve efficient desilication in phosphate reverse flotation. The test results of atomic force microscopy and Fourier transform infrared spectroscopy show that SDTQ collector acts on the quartz surface in the form of physical adsorption through the synergistic effect of quaternary ammonium cationic groups and long-chain alkyl groups. SDTQ collector can improve the grade of phosphate, reduce reagent cost, and has both economic and environmental advantages.

, authors=Yan LIU^{1, 2}, Zhongxian WU^{1, 2}, Dongping TAO^{1, 2}, authorsList=Yan LIU, Zhongxian WU, Dongping TAO, authorCompany=null, correspAuthors=Dongping TAO, 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=1322559986350281456, articleId=1322559984362181358, tenantId=1146029695717560320, journalId=1225396423026438145, language=CN, title=新型阳离子捕收剂磷矿反浮选脱硅试验研究, columnId=1226462297560892399, journalTitle=矿业研究与开发, columnName=选矿与资源综合利用, runingTitle=null, highlight=null, articleAbstract=

为有效解决传统磷矿反浮选脱硅阳离子捕收剂选择性差、仅适用于弱碱性环境分选的难题，研发了一种新型高效且适用于弱酸性环境分选的阳离子捕收剂SDTQ，并采用该药剂对贵州某硅镁质磷矿进行了浮选试验研究。结果显示：当pH=6、SDTQ用量达到25 mg/L时，石英纯矿物回收率接近100%，而氟磷灰石无明显可浮性；人工混合矿浮选中，在pH=6、SDTQ用量为100 mg/L的条件下，氟磷灰石和石英分离效果较好。在此基础上，以pH=6脱镁磷精矿矿浆为研究对象，进行了捕收剂用量条件试验，确定最佳SDTQ用量为1.1 kg/t。在该药剂用量下进行开路试验，获得了磷精矿中P₂O₅品位35.38%、P₂O₅回收率85.41%、酸不溶物含量5.53%的分选指标。最后通过“一粗一精一扫”的闭路流程，获得了磷精矿中P₂O₅品位35.49%、P₂O₅回收率90.31%、酸不溶物含量9.81%的良好指标。相比于十二胺，SDTQ使磷精矿品位提高了2.05个百分点，回收率提高了10.02个百分点。Zeta电位和接触角测量结果表明，SDTQ通过静电作用选择性地吸附于石英表面，强化石英与氟磷灰石之间疏水性差异是实现磷矿反浮选高效脱硅的关键机制。原子力显微镜和傅里叶变换红外光谱仪测试结果表明，SDTQ捕收剂借助季铵阳离子基团与长链烷基的协同作用，以物理吸附的形式作用在石英表面。SDTQ捕收剂可提高磷矿品位，降低药剂成本，并兼具经济与环保优势。

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刘燕（2001—），女，山东德州人，硕士研究生，主要从事矿物浮选研究。E-mail: 17861876237@163.com

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刘燕（2001—），女，山东德州人，硕士研究生，主要从事矿物浮选研究。E-mail: 17861876237@163.com

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