Article(id=1226462297212765148, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1226462293408531329, 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=1731772800000, receivedDateStr=2024-11-17, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1770340998222, onlineDateStr=2026-02-06, pubDate=1761321600000, pubDateStr=2025-10-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1770340998222, onlineIssueDateStr=2026-02-06, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1770340998222, creator=13701087609, updateTime=1770340998222, updator=13701087609, issue=Issue{id=1226462293408531329, tenantId=1146029695717560320, journalId=1225396423026438145, year='2025', volume='45', issue='10', pageStart='1', pageEnd='288', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1770340997315, creator=13701087609, updateTime=1770341205851, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1226463168155792201, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1226462293408531329, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1226463168155792202, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1226462293408531329, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=251, endPage=258, ext={EN=ArticleExt(id=1226462297418286056, articleId=1226462297212765148, tenantId=1146029695717560320, journalId=1225396423026438145, language=EN, title=Experimental Study on Reverse Flotation of Cationic Collector Based on an Industrial Waste A mine, columnId=null, journalTitle=Mining Research and Development, columnName=null, runingTitle=null, highlight=null, articleAbstract=

China's iron ore resources are increasingly depleted, and they have difficult to select characteristics such as poor, fine and miscellaneous. The traditional anionic collector has large dosage, complex reagent system and poor activity. In order to solve this problem, the surfactant processed by industrial waste amine (YTDB) was used as cationic collector to study the single mineral flotation test and mineral adsorption mechanism of quartz and hematite. The results show that when dodecylamine (DDA) is used as collector, under the conditions of pH=7 and collector dosage of 20 mg/L, the recovery rate of quartz is 78.36%, and the recovery rate of hematite is 12.57%. At this time, the flotation difference is the largest. When YTDB is used as collector, under the condition of pH=7 and collector dosage of 15 mg/L, the recovery rate of quartz is 91.27%, and the recovery rate of hematite is 12.67%. At this time, the flotation difference is the largest. YTDB is obviously better than DDA in flotation index, and saves the dosage of reagent to a certain extent. By testing the infrared spectrum, surface tension and Zeta potential before and after the interaction of the agent and the mineral, it is found that YTDB adsorbed on the surface of quartz.

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我国铁矿资源日益枯竭,其存在贫细杂等难选特质。传统阴离子捕收剂药剂用量大、药剂制度复杂、活性差。为解决这一问题,采用工业废胺经过加工后的表面活性剂(YTDB)作为阳离子捕收剂,对石英和赤铁矿进行了单矿物浮选试验以及矿物吸附机制的研究。结果表明,当十二胺(DDA)作为捕收剂时,在pH=7、捕收剂用量为20 mg/L的条件下,可以得到石英的回收率为78.36%,赤铁矿的回收率为12.57%,此时浮选差异性最大;当YTDB作为捕收剂时,在pH=7、捕收剂用量为15 mg/L的条件下可以得到石英的回收率为91.27%,赤铁矿的回收率为12.67%,此时浮选差异性最大,YTDB在浮选指标上明显优于DDA,并一定程度上节省了药剂用量。通过测试药剂与矿物作用前后的红外光谱、表面张力以及Zeta电位,发现YTDB在石英表面发生了吸附作用。

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赵通林(1970—),男,辽宁鞍山人,硕士,教授,研究方向为浮选及矿产资源综合利用。E-mail:
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郑业超(1998—),男,安徽合肥人,硕士研究生,研究方向为浮选及资源综合利用。E-mail:

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郑业超(1998—),男,安徽合肥人,硕士研究生,研究方向为浮选及资源综合利用。E-mail:

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郑业超(1998—),男,安徽合肥人,硕士研究生,研究方向为浮选及资源综合利用。E-mail:

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XRF test results of quartz monomineral ore

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SiO2Al2O3K2OCaOMgOTiO2Fe2O3Cr2O3ZrO2
96.362.460.5560.260.20.090.060.010.004
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石英单矿物 XRF 试验结果

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SiO2Al2O3K2OCaOMgOTiO2Fe2O3Cr2O3ZrO2
96.362.460.5560.260.20.090.060.010.004
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XRF test results of hematite monomineral ore

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Fe2O3SiO2Al2O3MgOSO3CaOTiO2K2OCr2O3
96.842.170.340.230.180.120.0570.0360.027
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赤铁矿单矿物 XRF 试验结果

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Fe2O3SiO2Al2O3MgOSO3CaOTiO2K2OCr2O3
96.842.170.340.230.180.120.0570.0360.027
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基于一种工业废胺的阳离子捕收剂反浮选试验研究
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郑业超 , 赵通林 , 依爽 , 马芳源
矿业研究与开发 | 选矿与资源综合利用 2025,45(10): 251-258
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矿业研究与开发 | 选矿与资源综合利用 2025, 45(10): 251-258
基于一种工业废胺的阳离子捕收剂反浮选试验研究
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郑业超 , 赵通林 , 依爽, 马芳源
作者信息
  • 辽宁科技大学 矿业工程学院,辽宁 鞍山市 114000
  • 郑业超(1998—),男,安徽合肥人,硕士研究生,研究方向为浮选及资源综合利用。E-mail:

通讯作者:

赵通林(1970—),男,辽宁鞍山人,硕士,教授,研究方向为浮选及矿产资源综合利用。E-mail:
Experimental Study on Reverse Flotation of Cationic Collector Based on an Industrial Waste A mine
Yechao ZHENG , Tonglin ZHAO , Shuang YI, Fangyuan MA
Affiliations
  • School of Mining Engineering, Liaoning University of Science and Technology, Anshan, Liaoning 114000, China
出版时间: 2025-10-25
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我国铁矿资源日益枯竭,其存在贫细杂等难选特质。传统阴离子捕收剂药剂用量大、药剂制度复杂、活性差。为解决这一问题,采用工业废胺经过加工后的表面活性剂(YTDB)作为阳离子捕收剂,对石英和赤铁矿进行了单矿物浮选试验以及矿物吸附机制的研究。结果表明,当十二胺(DDA)作为捕收剂时,在pH=7、捕收剂用量为20 mg/L的条件下,可以得到石英的回收率为78.36%,赤铁矿的回收率为12.57%,此时浮选差异性最大;当YTDB作为捕收剂时,在pH=7、捕收剂用量为15 mg/L的条件下可以得到石英的回收率为91.27%,赤铁矿的回收率为12.67%,此时浮选差异性最大,YTDB在浮选指标上明显优于DDA,并一定程度上节省了药剂用量。通过测试药剂与矿物作用前后的红外光谱、表面张力以及Zeta电位,发现YTDB在石英表面发生了吸附作用。

阳离子捕收剂  /  反浮选  /  YTDB  /  回收率

China's iron ore resources are increasingly depleted, and they have difficult to select characteristics such as poor, fine and miscellaneous. The traditional anionic collector has large dosage, complex reagent system and poor activity. In order to solve this problem, the surfactant processed by industrial waste amine (YTDB) was used as cationic collector to study the single mineral flotation test and mineral adsorption mechanism of quartz and hematite. The results show that when dodecylamine (DDA) is used as collector, under the conditions of pH=7 and collector dosage of 20 mg/L, the recovery rate of quartz is 78.36%, and the recovery rate of hematite is 12.57%. At this time, the flotation difference is the largest. When YTDB is used as collector, under the condition of pH=7 and collector dosage of 15 mg/L, the recovery rate of quartz is 91.27%, and the recovery rate of hematite is 12.67%. At this time, the flotation difference is the largest. YTDB is obviously better than DDA in flotation index, and saves the dosage of reagent to a certain extent. By testing the infrared spectrum, surface tension and Zeta potential before and after the interaction of the agent and the mineral, it is found that YTDB adsorbed on the surface of quartz.

Cationic collector  /  Reverse flotation  /  YTDB  /  Recovery rate
郑业超, 赵通林, 依爽, 马芳源. 基于一种工业废胺的阳离子捕收剂反浮选试验研究. 矿业研究与开发, 2025 , 45 (10) : 251 -258 .
Yechao ZHENG, Tonglin ZHAO, Shuang YI, Fangyuan MA. Experimental Study on Reverse Flotation of Cationic Collector Based on an Industrial Waste A mine[J]. Mining Research and Development, 2025 , 45 (10) : 251 -258 .
钢铁工业最重要的原料是铁矿石。绝大部分的铁矿石具有易碎特质,嵌布粒度较低,在开采和加工过程中难免会产生大量的细粉和泥,不能直接在高炉中进行冶炼,对选矿工艺有极高的要求。天然的铁矿通常具有顺磁性质,对于这些低品位、粒度极细的铁矿石,磁选无疑是最常见的选别方式,可通过有用矿物与脉石矿物的磁性差异进行选别作业[1],可以很大程度上去除一部分脉石矿物。然而,作为工业生产以及优质冶金原料的高纯度铁矿石,磁选往往达不到精矿的要求,而浮选作为去除细粒级杂质最有效的选矿方法,可以最大程度减少脉石矿物的含量[2]
浮选,通常也被称为泡沫浮选,是国内铁矿石最重要以及最通用的选矿技术,它是通过脉石矿物与有用矿物表面性质的差异来分离脉石矿物的技术过程,涉及固、液、气三相相互作用,矿物颗粒组成固相,水和表面活性剂成分组成液相,气相则由气泡内部组成[3]。作为浮选中最重要的浮选药剂捕收剂,主要是通过物理吸附以及化学吸附吸附在矿物表面,使其具有疏水性,从而聚集在泡沫上与亲水颗粒分离[4]。目前铁矿石中最主要的脉石矿物是石英,石英也几乎存在于所有金属氧化物的矿石中,常用反浮选选别[5-8]
反浮选中常见捕收剂可分为非离子型和离子型捕收剂,而捕获石英常用到的捕收剂为离子型。离子型捕收剂具有亲矿物的极性部分和碳氢自由链的非极性部分[9],矿物通常吸附于离子型捕收剂的极性部分,这些极性部分通常携带阴离子和阳离子。传统阴离子捕收剂在反浮选铁矿中广泛应用,例如,王秋林等[10]采用弱磁-强磁-阴离子反浮选流程选别东鞍山铁矿,通过使用KS捕收剂进行了“一粗一精三扫”的反浮选闭路试验,最终得到铁品位为67.55%、回收率为78.22%的铁精矿。龚豪[11]使用新研发阴离子捕收剂H-27A,以李楼铁矿为实际矿物,进行“一粗一精三扫”的反浮选闭路试验,最终得到铁品位为66.85%、铁回收率为90.71%的铁精矿。
然而,阴离子捕收剂存在药剂用量大、药剂制度繁琐、耐低温效果差等问题[12],始终没有得到很好的解决。阳离子捕收剂则可以避免这一问题,其不需要消耗过多的能量来维持药剂的溶解度和活性[13]。本文采用工业废胺经过加工后的表面活性剂(YTDB)作为捕收剂,研究了YTDB作为浮选捕收剂的浮选效率及其对石英表面的吸附机制,探究其对石英和赤铁矿单矿物浮选行为的影响。
本试验所用的单矿物石英取自某矿厂,将制备后的石英单矿物样品进行X射线衍射(XRD)分析、X射线荧光光谱(XRF)分析和激光粒度分析,XRD的分析结果如图1(a)所示,XRF的分析结果见表1,粒度分析如图1(b)所示。从图1(a)可以看出,石英单矿物SiO2峰强度以及密度最高,说明SiO2占主导地位。从图1(b)可以看出,样品的中值粒径D50达到了133.5 μm, D90则达到了264.3 μm。综合上述矿物的纯度以及粒度,石英可满足后续单矿物试验以及机理分析的要求。
赤铁矿单矿物则取自某铁矿厂,将制备后的赤铁矿样品进行X射线衍射(XRD)分析、X射线荧光光谱(XRF)分析和激光粒度分析,XRD的分析结果如图2(a)所示,XRF的分析结果见表2,粒度分析如图2(b)所示。从图2(a)表2可以看出,Fe2O3峰强度最高,含量达到了96.84%,另外含有少量的氧化物SiO2、Al2O3等。从图2(b)可以看出,样品的中值粒径D50达到了79.89 μm, D90则达到了123.2 μm。综合上述纯度以及粒度,赤铁矿可满足后续单矿物试验的要求。
采用一次粗选的试验流程,探究二十胺(DDA)和YTDB在不同矿浆pH、不同捕收剂用量下,对石英以及赤铁矿回收率的影响。单矿物浮选试验在XFD Ⅲ浮选机进行,在室温条件下配制矿浆,称取2.00 g的单矿物放入浮选槽中,再加入20 g去离子水,控制浮选机的搅拌速度为1 900 r/min,搅拌2 min以充分搅匀矿浆。加入事先准备好的pH调整剂调浆3 min,再加入捕收剂调浆3 min后,开始刮泡,控制刮泡时间为3 min。浮选结束后,将精矿进行过滤、烘干、称重,随后计算其回收率。单矿物浮选试验流程如图3所示。
本试验采用傅里叶变换红外光谱仪对药剂及药剂作用后的石英进行红外光谱测试分析,分析药剂在石英上的吸附作用机制。首先,取1 mg制备好的样品与100 mg溴化钾放在玛瑙研钵中混合均匀并进行研磨,研磨至粉末状后,取出少量样品进行压片制样。然后,放入傅里叶变换红外光谱仪中对样品进行红外光谱检测,光谱的测试范围为400~4 000 cm−1。检测完成后对光谱进行峰位置的识别,对比已知的光谱查找分子内不同位置的基团,对比药剂与石英作用前后光谱的变化。
本试验采用Zeta电位仪对药剂及药剂作用后的石英进行Zeta电位分析,从而分析药剂在石英上的吸附作用机制。控制温度为25 ℃,首先,称取50 mg的样品加入40 mL的去离子水进行搅拌,再加入配置好的3%的NaOH溶液和HCL溶液调节矿浆的pH,与药剂作用的石英样品组需要加入一定量的药剂,再放入磁力搅拌器中以1 500 r/min的搅拌转速搅拌5 min,然后再静置5 min,取上层清液放入样品池中,调节仪器参数开始测试。每个样品测试3次后取平均值。
本试验采用全自动表面张力仪对药剂作用后的石英矿浆进行表面张力分析,探究YTDB和DDA分别与石英作用后对溶液表面张力的影响。首先放置一定量的去离子水在试样台上,调节参数将悬挂的铂金环浸入去离子水中,对表面张力仪进行纯水校准。完成后,按相同的步骤在试样台上放置配置好的石英+药剂悬浮溶液,进行表面张力测试,每个样品测试3次后取平均值。
图4显示了DDA浮选体系下,不同pH对赤铁矿和石英回收率的影响。此时矿浆温度为室温,DDA的用量为20 mg/L,控制矿浆的pH为2~11。当pH从2增加到4时,石英的回收率很低,捕收效果较差。当pH增大至7时,可以看出此时石英的回收率最高,达到了78.36%。pH继续增大至9时,此时回收率略微有所下降,但仍维持在76.57%以上,说明pH在7~9范围内为最佳可浮区间。当pH>9时,此时石英的回收率急剧下降。当pH从2增加到7时,赤铁矿的回收率很低,捕收效果差;当pH从7增加到9时,DDA对赤铁矿浮选回收率急剧上升,在pH=9时回收率达到了40.36%。当pH从9增加至11时赤铁矿的回收率有所降低。
综上所述,当pH=7时,石英回收率为78.36%,赤铁矿的回收率为12.57%,两者回收率差值最大,此时可浮性差异最大,故在DDA浮选体系下,pH=7为矿浆最佳pH。
图5为YTDB浮选体系中矿浆pH对石英和赤铁矿回收率的影响。此时矿浆温度为室温,YTDB的用量为20 mg/L,控制矿浆的pH为2~11。由图5可知,矿浆pH对浮选指标影响较为明显。当pH从2增加至7时,石英回收率稳步上升;当pH=7时,石英的回收率最高,达到了91.42%,远远超出了DDA最佳浮选回收率,说明YTDB对石英的选择性优于传统捕收剂DDA;当pH继续增大至9时,回收率略微有所下降。当pH>9时,回收率急速降低,这一趋势与DDA类似,可能与DDA含有相同的成分或官能团有关。当pH从2增大至10时,赤铁矿回收率缓慢上升,当pH=10时,赤铁矿回收率最高,为22.38%。pH继续增大,回收率有所降低。
图6对比了不同单矿物体系下,pH对YTDB与DDA浮选回收率的影响,从石英来看,YTDB和DDA的最佳pH均在7~9之间。当pH<9时,YTDB对石英的回收率要明显优于DDA,这表明YTDB对石英的捕收性能要强于DDA。从赤铁矿来看,当pH<7时,尽管YTDB对赤铁矿的捕收效果更强,这可能对浮选不利,但从石英与赤铁矿回收率的差值来看,YTDB均高于DDA,尤其当pH为7~9时,YTDB明显更优。综上所述,当pH=7时,石英回收率为91.42%,赤铁矿的回收率为16.32%,两者回收率差值最大,此时可浮性差异最大,故在YTDB浮选体系下,pH=7为矿浆最佳pH。
图7为DDA用量对石英和赤铁矿回收率的影响。此时矿浆温度为室温,矿浆的pH为7,控制矿浆的捕收剂的用量为3~60 mg/L。当捕收剂用量从3 mg/L增加到30 mg/L时,石英的回收率增加迅速,捕收效果明显提升,石英的回收率从46.63%增长至89.36%。当捕收剂用量为60 mg/L,石英的回收率为91.63%,仅仅增加2.27个百分点。当捕收剂用量从3 mg/L增加到20 mg/L时,赤铁矿的回收率增加较为平稳,回收率从2.93%增加到12.57%。继续增大捕收剂用量,可以看出此时赤铁矿的回收率急速上升,当捕收剂用量为60 mg/L,此时回收率为60.36%。
综上所述,当捕收剂用量为20 mg/L时,石英回收率为78.36%,赤铁矿的回收率为12.57%,两者回收率差值最大,此时可浮性差异最大,故在DDA浮选体系下,捕收剂用量为20 mg/L为最佳药剂用量。
图8为YTDB用量对石英和赤铁矿回收率的影响。此时矿浆温度为室温,矿浆的pH为7,控制矿浆的捕收剂的用量为3~60 mg/L。由图8可知,随着捕收剂用量的增大,石英和赤铁矿回收率影响显著,都呈上升趋势,石英和赤铁矿均在捕收剂用量为60 mg/L时回收率最高,分别为96.83%和42.28%。当捕收剂用量从3 mg/L增加到15 mg/L时,石英的回收率增加迅速,捕收效果明显提升,回收率从55.72%增长至91.27%。继续增大捕收剂用量,可以发现石英的回收率已趋于平稳且缓慢提升的状态,当捕收剂用量为60 mg/L,回收率为96.83%。当捕收剂用量从3 mg/L增加到60 mg/L时,赤铁矿的回收率增加始终较为平稳,回收率从6.65%增加到42.28%。
图9对比了不同单矿物体系下,捕收剂用量对YTDB与DDA浮选回收率的影响,从石英来看,不论在何种药剂用量下,YTDB的回收率都是要大于DDA的,说明YTDB对石英的捕收性能更强。当捕收剂用量为15 mg/L时,YTDB浮选体系中石英的回收率趋于平稳;当捕收剂用量为30 mg/L时,DDA浮选体系中石英的回收率趋于平稳,说明YTDB不仅对石英的捕收性能优于DDA,且在一定程度上节省了药剂用量。从赤铁矿来看,当捕收剂用量小于20 mg/L时,YTDB对赤铁矿的捕收效果更强;当捕收剂用量大于20 mg/L时,DDA对赤铁矿的捕收效果更强。尽管在捕收剂用量较小情况下,YTDB对赤铁矿捕收能力更强,这可能对浮选不利,但从石英与赤铁矿回收率的差值来看,YTDB均明显优于DDA。
综上所述,当捕收剂用量为15 mg/L时,石英回收率为91.27%,赤铁矿的回收率为12.67%,两者回收率差值最大,此时可浮性差异最大,故在YTDB浮选体系下,捕收剂用量为15 mg/L时为最佳药剂用量。
图10显示了YTDB的红外光谱测试结果。由图10可知,3 513.86 cm−1处出现了一处弱宽峰,是N—H伸缩振动峰;2 923.34 cm−1出现的弱峰以及2 855.98 cm−1处出现的弱峰分别是—CH2—对称伸缩振动峰以及非对称伸缩振动峰;1 631.33 cm−1处和1 459.56 cm−1处出现的两个峰,均为—NH2弯曲振动吸收峰;1 102.64 cm−1处出现了一个弱宽峰,是C—N伸缩振动吸收峰[14]
图11显示了石英与YTDB作用前后的红外光谱图谱。对比石英的红外图谱可以看出,出现了图10中YTDB中含有的N—H伸缩振动峰、—CH2—伸缩振动峰以及—NH2弯曲振动吸收峰,说明YTDB已在石英表面发生了吸附作用。1 084.54 cm−1处Si—O—Si反对称伸缩振动吸收峰蓝移至1 086.08 cm−1;786.39 cm−1处Si—O键对称伸缩振动吸收峰蓝红移至789.26 cm−1处。然而,发生作用的图谱中并未有新的峰产生,这表明YTDB与石英之间产生的吸附作用为物理吸附[15]。1 618.68 cm−1处—OH的反对称伸缩振动吸收峰红移至1 614.02 cm−1,这可能是由于药剂所含有的—OH或—NH与石英表面产生氢键作用。综上所述,石英与YTDB之间发生了物理吸附与氢键吸附作用。
图12显示了DDA与YTDB在石英矿浆中的表面张力。由图12可知,随着捕收剂浓度增大,液体的表面张力均逐渐降低。在DDA捕收体系中,当浓度增加到100 mg/L时,液体的表面张力开始趋于稳定,再增加DDA浓度,表面张力变化不大。故DDA体系下,液体的最低表面张力约为33.79 mN/L,临界胶束浓度为100 mg/L;在YTDB捕收体系中,当浓度增加到60 mg/L时,液体的表面张力开始趋于稳定,再增加YTDB浓度,表面张力变化不大。故YTDB体系下,液体的最低表面张力约为29.67 mN/L,临界胶束浓度为60 mg/L。综上所述,从表面张力来看,YTDB形成胶束和降低表面张力能力更强,疏水性更好,捕收能力更强。
图13显示了不同pH条件下,石英、石英与YTDB作用后以及石英与YTDB和淀粉作用后的Zeta电位测试结果。当pH<2.2时,石英带正电,加入YTDB后,电位明显升高,此时YTDB主要于石英表面发生氢键吸附[16];当pH为2.2~7.2时,石英表面带负电,加入YTDB后,YTDB与石英表面发生离子吸附并伴随氢键吸附,此时YTDB+石英与石英之间电位差开始增大;当pH>7.2时,此时石英表面带负电,加入YTDB后,由于pH的不断增大,YTDB阳离子不断减少,此时YTDB与石英表面发生氢键吸附作用,YTDB+石英与石英之间电位差不断减小。石英与YTDB和淀粉共同作用时,对比石英与YTDB单独作用可以发现,两者变化接近,这表明淀粉对YTDB在石英表面吸附行为影响较小。
图14显示了不同pH条件下,赤铁矿、赤铁矿与YTDB作用后以及赤铁矿与YTDB和淀粉作用后的Zeta电位测试结果。从图14可以看出,当pH<6.2时,加入YTDB后赤铁矿电位有所升高,这可能因为YTDB与矿物表面发生氢键作用;当pH>6.2时,赤铁矿负电位持续增加,这表明YTDB与赤铁矿表面发生离子吸附,且同时伴随着一定的氢键吸附[17]
当赤铁矿与YTDB和淀粉作用后,对比赤铁矿与YTDB单独作用可以发现,零电点从pH=8.1向左偏移至pH=6.7,这表明淀粉对赤铁矿产生了吸附作用。当pH<6.2时,赤铁矿带正电,在赤铁矿与YTDB体系下,加入淀粉后赤铁矿电位明显减小,由于淀粉具有负电性,此时赤铁矿与淀粉发生较为明显的静电吸附,并伴随一定的氢键吸附;当6.2<pH<8.1时,赤铁矿带负电,在赤铁矿与YTDB体系下,此时赤铁矿与YTDB产生一定的静电吸附和氢键吸附后表面带正电,加入淀粉后,负电性的淀粉可能以静电吸附、氢键作用以及键合吸附共同作用于赤铁矿表面;当pH>8.1时,赤铁矿带负电,随着pH增大,体系中YTDB以阳离子形式存在逐渐减少,赤铁矿与YTDB产生的静电吸附和氢键吸附作用减弱,此时负电性的淀粉主要是以氢键作用以及键合吸附作用于赤铁矿表面[18]
图15显示了不同pH条件下YTDB和矿物作用后与矿物之间的电位差值(以下称电位变化率),反映YTDB与矿物作用后电位的变化程度。从图15中可以看出,YTDB的加入对石英和赤铁矿电位变化率都有显著的影响,但对比赤铁矿,石英电位变化更为明显,尤其当2<pH<8时,YTDB对石英的电位影响程度要远高于YTDB对赤铁矿的电位影响,说明此时YTDB中所含有组分对石英的吸附性能要强于赤铁矿,在此条件下,石英与赤铁矿的回收率具有差异性,从而更好地选择性捕收石英。
(1)传统DDA单矿物浮选试验结果表明,当pH=7、捕收剂用量为20 mg/L时,可以得到石英的回收率为78.36%,赤铁矿的回收率为12.57%,此时两者的浮选差异性最大。
(2)YTDB单矿物浮选试验结果表明,当pH=7、捕收剂用量为15 mg/L时,可以得到石英的回收率为91.27%,赤铁矿的回收率为12.67%,此时两者的浮选差异性最大。对比两者,YTDB对石英的捕收性能要更优于传统捕收剂DDA。
(3)红外光谱的结果表明,石英与YTDB之间发生了物理吸附与氢键吸附作用;表面张力测试结果表明,相比于传统捕收剂DDA, YTDB形成胶束和降低表面张力能力更强,疏水性更好,这有助于输送更多脉石矿物进入泡沫区;Zeta电位的结果表明,YTDB与淀粉的共同作用下,YTDB对石英的吸附能力远强于赤铁矿,而淀粉对赤铁矿的吸附能力远强于石英,正是因为两者吸附差异性,才能更好地选择性捕收石英。
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2025年第45卷第10期
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  • 接收时间:2024-11-17
  • 首发时间:2026-02-06
  • 出版时间:2025-10-25
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  • 收稿日期:2024-11-17
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    辽宁科技大学 矿业工程学院,辽宁 鞍山市 114000

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赵通林(1970—),男,辽宁鞍山人,硕士,教授,研究方向为浮选及矿产资源综合利用。E-mail:
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2种不同金属材料的力学参数

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species
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Percentage of
total species (%)

Genus
种数
Number of
species
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Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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