共查询到20条相似文献,搜索用时 78 毫秒
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概述 硫化矿物的无捕收剂浮选既非新概念,亦非无稽之谈。它几乎从本世纪初就以好几种形式在生产中应用。现在,一些现代化选厂,每天有上千吨辉钼矿在没有捕收剂的条件下浮选。也可见到方铅矿和闪锌矿一类矿物的无捕收剂浮选。 硫化矿物无捕收剂浮选的认真研究似乎始于Ravitz与Porier及Herd与Ure的工作。他们研究了方铅矿的无捕收剂浮选。矿物用热的盐溶液如NH_4CH_3COO、NH_4Cl及NaCl洗涤并在浮选前用蒸馏水漂洗。这样预处理后再从系统中尽可能排除氧。在所有情况下,方铅矿经预处理后无任何添加剂都浮选良好。Herd与Ure认为热盐溶液洗涤的作用是除去方铅矿表面的亲水氧化产物而暴露出未氧化的疏水表面。 相似文献
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本实验研究了应用包头稀土研究院研制的新型赤铁矿捕收剂G115对白云鄂博细粒赤铁矿的捕收作用。实验证明:G115有极好的选择性,经过一粗一扫即可获得铁精矿品位为56.25%,回收率为85.54%的指标,而且其捕收作用不受矿泥干扰,是一种有效的赤效铁矿捕收剂。 相似文献
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一种新型的选金药剂—35~#捕收剂,经几年的研制和对各种含金矿石的浮选结果表明:35~#药剂比其它巯基捕收剂能提高金的回收率和精矿品位。1986~1989年间,先后在辽宁省毛家店金矿、山东省莱州市留村金矿、山东招远县阜山金矿、山东省沂南金矿做了该药剂的选矿工业试验,使金回收率分别提高2.18%~5.45%,精矿品位也有提高。实践证明:35~#药剂对自然金和被氧化污染的金矿石的浮选特别有效。 相似文献
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J. I. Martins M. M. Amarante 《Mineral Processing and Extractive Metallurgy Review》2013,34(6):367-386
The production of high-grade scheelite concentrates from low-grade ores involves a set of operations to eliminate the undesirable minerals. The present work includes as main goals the study of the effect of (i) meteorization of the ore, (ii) pH during the grinding, (iii) the amount of soda ash in grinding process, (iv) the depression or previous flotation of sulphides, (v) and the acidification of the silicate solution on the scheelite grade and tungsten recovery from flotation of Tarouca tailings. The studies which led to the conditions to produce a 72% WO3 concentrate at a 71% recovery from fresh tailings assaying 0.52% WO3, using Pamak-4 as collector are presented. 相似文献
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V. A. Chanturiya S. A. Kondratiev 《Mineral Processing and Extractive Metallurgy Review》2019,40(6):390-401
ABSTRACTThermodynamic concepts are shown to be inadequate when applied to the complex multi-staged and fast formation process of a flotation complex and the relevance is demonstrated of studying the interaction kinetics of a mineral particle and a gas bubble. A mechanism is proposed explaining the formation of flotation contact, in which both the ionic and physical forms of sorption, active with respect to the gas-liquid interface, play the key role. Sorption is physically represented by either ion-molecular associates or long-chain collectors. While in the flotation of semiconductor sulfides the physically sorbed collector form is formed by an electrochemical mechanism and is represented by xanthate-dixanthogenide associates, where the flotation of dielectric minerals is activated by heavy metal ions, xanthate ion-metal xanthate associates can take on this role. Physically, the collector’s sorption form is present in the collector-free flotation, where polysulfide forms act as the former. It is shown that metal xanthate – dixanthogen – xanthate ion mixtures forming when flotation is activated by copper have especially high collector performance. 相似文献
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阳离子捕收剂对菱锌矿的浮选研究 总被引:1,自引:0,他引:1
通过单矿物浮选实验考察了直链脂肪胺、常规季铵盐和Gem in i季铵盐表面活性剂三类阳离子捕收剂对菱锌矿的浮选行为,利用动电位测定和红外光谱分析研究了十二胺浮选菱锌矿的作用机理。结果表明:三类药剂对菱锌矿的浮选性能顺序为:直链脂肪胺(Gem in i阳离子表面活性剂(常规季铵盐,在直链脂肪胺中,十二胺的浮选效果最好;菱锌矿的等电点是pH 8.0,十二胺主要靠静电作用物理吸附在菱锌矿表面。 相似文献
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文章考察了阳离子捕收剂十二胺、十二烷基三甲基氯化铵及十六烷基三甲基溴化铵对单矿物一水硬铝石和高岭石浮选行为的影响,并初步探索了铝土矿中一水硬铝石与主要脉石矿物高岭石的反浮选分离。试验结果表明:在pH=8、捕收剂十二烷基三甲基氯化铵的浓度为2.0×10^-4mol/L、可溶性淀粉浓度为80mg/L时,一水硬铝石和高岭石回收率分别达到5%和81%,可有效实现一水硬铝石和高岭石的分离。 相似文献
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浮选设备自动控制技术的发展 总被引:3,自引:0,他引:3
介绍目前国内生产实践中应用的新型浮选机、浮选柱的控制原理,利用液位自动控制系统、充气量自动控制系统、专家系统实施稳定控制,探讨浮选设备先进控制系统的发展方向。 相似文献