铜矿浮选新工艺与新型高效捕收剂研究概况

针对近年来研发出来且具有实际应用价值的铜矿浮选捕收剂以及改进的浮选新工艺进行了简要分析与系统归纳,主要从氧化铜、硫化铜两方面综述了浮选新工艺与单一浮选捕收剂、组合捕收剂的实际应用效果。     

胺醇组合捕收剂的应用现状及发展前景

在对胺类捕收剂进行概述的基础上,总结了国内外近年来胺类捕收剂与脂肪醇组合使用的研究成 果,探讨了胺醇组合捕收剂在浮选中的应用情况,并对其浮选性能和组合作用机理进行了分析。 脂肪醇与胺组合使用,对提高胺类捕收剂的浮选效果具有重要意义,且具有很好的发展前景和研 究价值。     

硫砷矿物浮选分离药剂的研究进展

综述了毒砂浮选常规抑制剂和捕收剂的研究进展,特别介绍了近年来报道较多的毒砂组合抑制剂、组合捕收剂和新型药剂在含砷硫化矿石浮选分离中应用的研究成果,同时对含砷硫化矿浮选药剂今后的发展方向进行了展望。      

萤石矿浮选研究进展

概述了萤石矿浮选捕收剂、抑制剂、工艺流程结构及浮选设备应用的研究现状,对存在的浮选技术难点及其发展趋势进行了介绍,指出新型高效捕收剂和抑制剂组合的研发及高效浮选设备的应用是萤石矿浮选研究的发展趋势。     

细粒锡石浮选组合药剂研究与应用进展

采用浮选工艺回收细粒锡石,药剂是关键。大量的研究与生产实践表明,浮选药剂的组合能提升锡石的综合回收指标。为了系统、全面地了解细粒锡石浮选组合药剂的研究与应用进展,综述了细粒锡石浮选的组合捕收剂、组合调整剂以及捕收剂+调整剂组合的优点、作用机理及应用现状,指出使用组合药剂能取得较理想的浮选指标与药剂间的协同作用密不可分。     

浮选组合药剂协同效应定量研究

应用浮选药剂理论和表面活性剂的物理化学性质,探索了浮选组合药剂的协同效应。以油酸和不同碳链长度的羧酸类捕收剂、油酸钠和不同饱和度的羧酸类捕收剂、乳化剂和油酸钠、磺酸盐类捕收剂和油酸钠、羧酸类捕收剂和苯甲羟肟酸等组合药剂为例,通过计算药剂结构参数和疏水链-疏水链之间相互作用,结合文献数据,发现2种药剂结构参数相差越大,组合后溶液的表面张力下降越大;疏水链之间相互作用较强的2种捕收剂,选择性好的与捕收能力强的组合,浮选效果一般较好。该研究结果对组合浮选药剂协同效应的定量研究具有理论参考意义。     

氧化铜矿浮选捕收剂研究进展

根据矿石性质和药剂制度的不同,氧化铜矿石浮选分为直接浮选和硫化浮选。氧化铜常用捕收剂主要有黄药及其衍生物类、脂肪酸、膦酸类、羟肟酸类、螯合类等,本文归纳总结了目前氧化铜浮选法组合捕收剂和新型捕收剂的研究进展和应用情况,为氧化铜浮选药剂制度提供了参考。      

磷矿物浮选药剂的应用现状

主要介绍了磷矿物浮选过程中捕收剂和抑制剂的应用现状,并给出了几种磷矿物浮选药剂的组合应用情况.     

锂辉石浮选捕收剂及调整剂研究综述

从捕收剂和调整剂2大方面对国内外锂辉石浮选药剂进行了介绍和总结。锂辉石浮选捕收剂主要包括传统单一捕收剂、组合捕收剂和新型捕收剂3类。调整剂主要包括应用最广泛的NaOH-Na2CO3-CaCl2“三碱”组合调整剂,同时难免金属阳离子、无机阴离子、有机酸等调整剂对浮选过程的影响、对锂辉石活化作用及其选择性抑制作用的影响及对浮选机理的影响研究都是研究的热点。研发新型高效、高选择性、环保、耐低温、经济的捕收剂和调整剂将成为锂辉石浮选药剂未来发展的主要趋势。综合述评可以为锂辉石浮选药剂的研究提供参考。     

白钨矿浮选药剂研究现状

概述了白钨矿浮选捕收剂与调整剂的种类及其作用机理,重点介绍了近年来研究开发的白钨矿新型调整剂和新型捕收剂的性能,阐述了组合抑制剂和组合捕收剂在白钨浮选中的应用,指出了高效抑制剂、捕收剂今后的研究方向.     

Influence of important factors on flotation of zinc oxide mineral using cationic, anionic and mixed (cationic/anionic) collectors

In this study, the influences of important factors on smithsonite flotation are investigated. Dosages of sulphidizing agent and collector, desliming prior to flotation and the use of sodium hydroxide instead of sodium carbonate as the pH regulator are essential to the effective recovery of smithsonite in cationic flotation. The appropriate temperature for flotation was found to be 30–40 °C. Sodium hexametaphosphate (SH) and sodium silicate had the greatest selectivity between smithsonite–calcite and smithsonite–quartz, respectively. The results of oleic acid flotation showed that the grade and recovery of zinc were relatively low in comparison with the sulphidization-cationic flotation method. Despite using sodium silicate and SH as depressants in oleic acid flotation, flotation was not selective. Flotation using mixed collectors (Armac C + Potassium Amyl xanthate) showed promising results. The ratio of the mixed collectors and the sequence of addition of mixed collectors were important criteria in attaining true mixed collector flotation.     

The use of canola oil as an environmentally friendly flotation collector in sulphide mineral processing

The efficiency of mineral flotation relies on the ability to selectively recover different value minerals into their respective concentrates at optimum grades and recoveries based on the differing hydrophobicities. Many of the common hydrophobizing reagents (collectors) currently used in flotation have significant occupational and environmental implications, and hence there is a quest for environmentally benign chemical additives that give similar or better performance than the more toxic conventional reagents. In this paper, we provide substantial experimental evidence that the use of edible, fatty acid-based oils (canola and palm) can foster the flotation recovery of chalcopyrite and molybdenite minerals more selectively against pyrite than the conventional collectors, sodium isopropyl, potassium amyl xanthates and diesel oil.Single and mixed chalcopyrite/pyrite minerals and plant sulphide ores’ flotation studies using canola and palm oils, in contrast with conventional collectors, are reported herein. The results indicate greater efficacy of the canola and palm oils in comparison with the conventional collectors for chalcopyrite and molybdenite recoveries and product upgrades. This is believed to be due to the edible oils’ specific interactions with iron oxides sites preferentially formed in situ on the surfaces of the chalcopyrite or molybdenite in the pulp rather than on the pyrite surfaces, causing limited recovery of the pyrite. Complementary contact angle results confirmed that more canola oil is adsorbed onto chalcopyrite surfaces than onto pyrite surfaces. For the mineral mixtures tested, the edible oil’s degree of unsaturation had a noticeable effect on its performance as a collector. A higher pyrite recovery and slightly lower chalcopyrite grade was obtained with palm oil than with canola oil. These findings suggest that the use of canola oil has a potential to add to the existing array of flotation collectors and would represent a combined opportunity for both the mining and agricultural sectors, with concomitant health, environmental and economic benefits.     

新型脂肪酸协同螯合类捕收剂对黑钨矿与脉石矿物浮选行为的影响

螯合类捕收剂与脂肪酸类捕收剂的组合使用是黑钨矿浮选的重要研究方向.采用单矿物试验方法研究了GYB螯合捕收剂和731、GYR、TAB-3三种代表性脂肪酸类捕收剂联用对黑钨矿和脉石矿物浮选行为的影响,并采用表面电位测定、红外光谱测定方法,对GYB、TAB-3以及两种捕收剂联用的作用机理进行了探讨.结果表明:GYB与脂肪酸捕...     

组合捕收剂浮选低氧化率混合铜矿石试验研究

针对某斑岩铜矿低氧化率矿石(氧化率为10.46 %)进行了回收氧化铜的试验研究。考查了不同捕收剂单用和组合使用回收氧化铜矿的效果, 结果表明:不论采用组合黄药或Y89, 与新型螯合捕收剂ZH 组合, 均能取得比原药剂单用时优良的选矿指标。     

The effect of using sodium di-methyl-dithiocarbamate as a co-collector with xanthates in the froth flotation of pentlandite containing ore from Nkomati mine in South Africa

Sodium ethyl and potassium amyl xanthates are commonly used in bulk and selective froth flotation of pentlandite ores respectively. Pulp pH plays a significant role in pentlandite flotation and xanthates are sensitive to pH. Consequently, more stable collectors have to be used in the froth flotation of pentlandite ores. The dithiocarbamates are possible replacement as they are believed to be stable in a wider range of pH and their use yields a faster flotation rates than xanthates. However, it may be uneconomical to use dithiocarbamates as pure collectors due to their cost. The present study explored feasibility of using di-C1-DTC to replace or partially replace PAX and SEX in nickel flotation. The tested molar ratios were 90:10 and 70:30; with xanthates as the abundant constituent in all the mixtures. This study showed that the using di-C1-DTC as co-collector was beneficial as the mixtures 30di-C1-DTC:70SEX and 10di-C1-DTC:90PAX improved nickel recovery and grade respectively. Furthermore, there were no significant differences in cumulative mass and water recoveries obtained with all the mixtures therefore differences in nickel recoveries were due to the differences in the selectivity properties of the collectors and not physical processes viz. physical entrapment and hydraulic entrainment.     

脂肪酸类捕收剂常温浮选氧化矿研究现状

脂肪酸是最常用的氧化矿浮选捕收剂。由于脂肪酸类捕收剂一般碳链较长,溶解分散性差,在氧化矿浮选过程中,往往需要加热矿浆来增强其对矿物的捕收作用,冬天温度低时表现得尤为明显。矿浆加热不仅需要额外的配套装置,还大大增加了浮选厂的能耗,从而增加其投资和运行成本。在氧化矿浮选中,尽管研究人员对开发新型捕收剂或复配捕收剂进行了广泛研究,但只有少数深入探索了脂肪酸类捕收剂常温浮选问题。本文总结使用脂肪酸类捕收剂时矿浆需要加热的原因、缺点以及可能存在的解决方法,为研究人员进一步解决氧化矿需加温浮选的工程问题提供思路。     

钛铁矿浮选药剂及其作用机理研究进展

原生钛铁矿石占有率高、品位低、嵌布复杂是我国钛铁矿资源的基本特征,采用传统的磁选工艺,钛铁矿回收率较低。相对于磁选工艺,浮选工艺在细粒物料回收方面具有显著的优越性,是微细粒钛铁矿回收的有效工艺。为了促进钛铁矿浮选工艺技术的进步,系统总结了钛铁矿浮选药剂的研究进展,综述了钛铁矿浮选药剂及其作用机理方面的研究成果。对研究与生产实践中常用的脂肪酸类、膦酸类、胂酸类、羟肟酸类等钛铁矿浮选捕收剂进行了逐一介绍;新型组合捕收剂结合了多种常规捕收剂的优点,是捕收剂开发与应用的重要研究方向;调整剂主要包括钛铁矿的活化剂和脉石矿物的抑制剂,这些药剂在脉石矿物与钛铁矿可浮性相当时,对浮选分离起着决定性的作用。结合现代测试分析方法,分析、综述了浮选药剂在矿物表面的作用方式,为钛铁矿的浮选提供了理论基础,为选矿工作者提供了技术参考。     

国内磷矿浮选捕收剂研究的新进展

针对磷矿浮选现状,概括了近年来国内磷矿浮选捕收剂的研究发展方向,即在同等条件下提高浮选指标的捕收剂、适用于浮选低品位矿石和常温或低温浮选的捕收剂,并总结了这三个研究方向所取得的研究成果。     

四川低品位含砷石英脉型金矿石浮选试验研究

对某低品位难选金矿进行的浮选试验研究表明,硫化矿包裹型金矿宜用浮选法进行分选,在处理该金矿时,组合捕收剂要比单一型的捕收剂效果好,在磨矿细度67.0%-74μm的条件下,金品位2.15 g/t的原矿,经过实验室闭路试验的一次异步混合浮选、两次精选、两次扫选流程的分选,可获得金精矿品位41.24 g/t、回收率85.83%的理想指标。