The composition of tailings particles in mines plays a key role in the flocculation settlement of slurries.To study the influence of coarse particle tailings(CPTs)on the flocculation settlement of tailings slurries(TS...The composition of tailings particles in mines plays a key role in the flocculation settlement of slurries.To study the influence of coarse particle tailings(CPTs)on the flocculation settlement of tailings slurries(TSs),static flocculent settling tests,scanning electron microscopy observations,and laser particle size analyses were conducted using the tailings obtained from a copper mine.The results demonstrate that(i)in the accelerated and free settling process,CPTs did not directly settle at the bottom of graduated cylinders;instead,they were netted by the flocculent structures(FSs)and settled together more quickly.The CPTs accelerate the rapid settlement of TSs;the acceleration effect is more obvious when the CPTs content is greater than 50 wt%.(ii)The most appropriate flocculant unit consumption(FUC)is 20 g·t-1,and no substantial increase is observed in the flocculant settling velocity with an increase in the flocculant because the effective FSs did not substantially change and thus did not lead to a notable increase in the settling velocity of the solid–liquid interface(SLI).(iii)In the effective settling space of the thickening facility,free water quickly flowed from the pores of FSs,which is reflected in the period from 0 to 1 min.展开更多
钪是一种稀散元素,在地壳中高度分散,现阶段对于钪产品的需求量较大,钪及其合金产品综合性能优越,被广泛应用于航空航天等行业。基于CiteSpace软件,结合文献计量法,对CNKI和Web of Science数据库中的论文进行了可视化分析。研究结果表明...钪是一种稀散元素,在地壳中高度分散,现阶段对于钪产品的需求量较大,钪及其合金产品综合性能优越,被广泛应用于航空航天等行业。基于CiteSpace软件,结合文献计量法,对CNKI和Web of Science数据库中的论文进行了可视化分析。研究结果表明:关于钪研究的外文文献数量明显多于中文文献,2010—2022年间对于钪的研究热度保持在较高水平,尤其在近五年,热度持续提升、发文量有所增加;“钪合金”“赤泥”等在关键词共现研究中出现的频次较高;钪的二次回收、萃取及钪合金发展等研究领域为主要的研究热点。本文研究了从原生矿石(稀土矿等)、工业废渣(赤泥等)及工业废液(盐酸废液等)等中回收钪的方法,并且重点关注了从钒钛磁铁矿尾矿与钛白废液中提钪的研究。“焙烧-浸出-萃取”是大部分提钪工艺会涉及到的过程,通过重选、磁选可以对原料进行预富集,离子交换法、沉淀法可提高钪产品纯度。未来可重点考虑从多种钪资源中协同回收钪的方法,进一步优化工艺流程,发展高效提钪技术。展开更多
基金financially supported by the National Key R&D Program of China(No.2017YFC0804601)the National Natural Science Foundation of China(Nos.51804134and 51804135)+2 种基金the Natural Science Foundation of Jiangxi Province(No.20181BAB216013)the Program of Qingjiang Excellent Young Talents,Jiangxi University of Science and Technologythe Doctoral Startup Fund of Jiangxi University of Science and Technology(No.jxxjbs17011)。
文摘The composition of tailings particles in mines plays a key role in the flocculation settlement of slurries.To study the influence of coarse particle tailings(CPTs)on the flocculation settlement of tailings slurries(TSs),static flocculent settling tests,scanning electron microscopy observations,and laser particle size analyses were conducted using the tailings obtained from a copper mine.The results demonstrate that(i)in the accelerated and free settling process,CPTs did not directly settle at the bottom of graduated cylinders;instead,they were netted by the flocculent structures(FSs)and settled together more quickly.The CPTs accelerate the rapid settlement of TSs;the acceleration effect is more obvious when the CPTs content is greater than 50 wt%.(ii)The most appropriate flocculant unit consumption(FUC)is 20 g·t-1,and no substantial increase is observed in the flocculant settling velocity with an increase in the flocculant because the effective FSs did not substantially change and thus did not lead to a notable increase in the settling velocity of the solid–liquid interface(SLI).(iii)In the effective settling space of the thickening facility,free water quickly flowed from the pores of FSs,which is reflected in the period from 0 to 1 min.
文摘钪是一种稀散元素,在地壳中高度分散,现阶段对于钪产品的需求量较大,钪及其合金产品综合性能优越,被广泛应用于航空航天等行业。基于CiteSpace软件,结合文献计量法,对CNKI和Web of Science数据库中的论文进行了可视化分析。研究结果表明:关于钪研究的外文文献数量明显多于中文文献,2010—2022年间对于钪的研究热度保持在较高水平,尤其在近五年,热度持续提升、发文量有所增加;“钪合金”“赤泥”等在关键词共现研究中出现的频次较高;钪的二次回收、萃取及钪合金发展等研究领域为主要的研究热点。本文研究了从原生矿石(稀土矿等)、工业废渣(赤泥等)及工业废液(盐酸废液等)等中回收钪的方法,并且重点关注了从钒钛磁铁矿尾矿与钛白废液中提钪的研究。“焙烧-浸出-萃取”是大部分提钪工艺会涉及到的过程,通过重选、磁选可以对原料进行预富集,离子交换法、沉淀法可提高钪产品纯度。未来可重点考虑从多种钪资源中协同回收钪的方法,进一步优化工艺流程,发展高效提钪技术。
