提高汤丹4#矿体浮选技术指标的试验研究

针对汤丹公司选厂铜精矿品位逐月下降的情况,对2 038片区4#矿体铜矿石单独处理,并采用腐植酸钠抑制碳质进行小型试验和工业试验。小型试验和工业试验结果表明,分选比混选可以分别提高精矿品位4.75%和4.10%,同时提高选矿回收率3.22%和2.05%。     

某铜铁矿选矿工艺研究

主要针对某铜铁矿矿石性质,研究其选矿工艺流程,最终确定选铜回路采用浮选工艺流程,浮选药剂为石灰和丁基黄药;选铁回路采用磁选工艺流程方案。最终铜精矿品位为20.53%、回收率94.50%,铁精矿品位58.54%、回收率72.30%,获得了较好的试验指标。     

铜铅混合精矿浮选分离工艺研究

针对铜铅锌多金属硫化矿可浮性相近、精矿互含的选矿难题,为获得合格的铅精矿和铜精矿产品,对临沧某铜铅锌多金属硫化矿混合浮选得到的铜铅混合精矿进行选矿试验研究.混合精矿中铜品位9.86%,铅品位31.26%,主要研究了亚硫酸+硫化钠+淀粉组成的组合抑制剂对铅的抑制作用,对三种药剂的配比及组合药剂的用量进行试验.最终,通过闭路流程得到铜精矿铜品位20.41%、回收率77.09%,铅精矿铅品位48.68%、回收率97.73%的,实现了铜铅的有效分离.     

云南某地混合铜矿选矿试验研究

对云南某地混合铜矿石进行了选矿试验研究。试验表明,原矿经一粗二精二扫的闭路浮选工艺流程,可获得铜精矿品位20.96%、铜回收率86.97%,银品位406.09 g/t、银回收率63.62%的良好指标,目的元素得到了回收利用。     

提高因民公司铜精矿中金品位试验研究

不改变因民公司选厂现有浮选工艺流程,并在保持现有铜选矿技术指标(铜回收率84.50%,铜精矿品位24%)不变的基础上,通过试验研究,将铜精矿中的金品位由现在的0.80 g/t提高到1.00 g/t(计价品位)以上,提高企业收入,同时提高资源综合利用率,实现矿山的持续健康发展。     

高含碳锌窑渣中Cu和Ag的综合回收

云南某锌窑渣Cu含量1.47%,Ag含量312 g/t,同时,窑渣中碳含量高达23.12%,为综合回收其中的Cu、Ag等有价金属进行了选矿试验研究.对浮选条件试验进行了研究.确定了最佳浮选条件并在此基础上进行了浮选闭路试验,结果表明,采用单一浮选工艺处理该窑渣Cu、Ag很难富集,铜精矿品位较低,并最终确定了"脱碳浮选—铜浮选—铜精矿浸出"的联合工艺流程,得到最终铜精矿Cu品位为11.83%,铜精矿含Ag品位为2 616 g/t,Cu、Ag的综合回收率分别为72.03%和75.06%,达到了综合回收窑渣中Cu、Ag的目的.采用联合工艺流程处理该窑渣避免了单一浮选工艺的局限性,极大地提高了铜精矿的品位.     

低品位重晶石的浮选特性研究

重晶石的用途非常广泛,对BaSO_4的含量要求85％～90％以上。但我国重晶石矿山贫矿多,富矿少,需进行选矿。因此,本文进行了低品位重晶石的浮选特性研究。结果确定了低品位重晶石浮选的最佳条件,并获得了品位98.2％,回收率82.3％的能生产高品位钡化合物的重晶石精矿,为今后重晶石选矿发展具有实用价值。     

细磷片低碳石墨浮选工艺研究

我国是天然石墨资源大国,储量、产量及出口量均居世界首位,但随着生产的发展,剩下的石墨矿品位较低,可选性下降,选矿回收率较低。通过实验,采用浮选法回收低品位石墨,使低碳石墨矿达到国家高碳标准,充分利用石墨资源,扩大石墨应用范围。试验以黑龙江鹤岗地区细鳞片石墨(固定碳含量为12.74%)为原料,采用浮选工艺,对该矿石采用一次粗选一次扫选,粗精矿五次再磨六次精选,中矿(1～3)合并再选,中矿4、5、6、7集中返回再磨Ⅰ的工艺流程,以煤油作捕收剂,2#油作起泡剂,生石灰作调整剂,使最终精矿品位提高到93.60%,回收率达91.42%。     

低品位硅钙质胶磷矿扩大连选的试验研究

为了验证某难选低品位硅钙质胶磷矿选矿工艺获得合格品位磷精矿的可靠性,依据小型试验确定的“阶段磨矿-多段反浮选-磁选”联合流程的工艺参数,配置了扩大试验设备,开展了1.0 t/d的选矿扩大试验研究,连续运行72 h的累计选矿指标为:磷精矿P2O5品位33.80%,回收率80.02%,倍半氧化物含量为2.49%。扩大试验所用药剂种类少,药剂选择性较好;工艺流程简单、操作稳定,对低品位硅钙质磷矿适应性较强。     

悬振锥面选矿机回收低品位伴生晶质铀矿的研究

针对辽宁凤城翁泉沟摇床选别微细粒晶质铀矿回收率低的问题,引进昆明理工大学研发的悬振锥面选矿机进行选矿试验研究.单机工业试验获得了较适宜的工作参数.在满足精矿品位要求时,获得的回收率在60%左右,远远高于摇床选别时的回收率.为重选微细粒晶质铀矿提供了新方法.     

难处理高结合率氧化铜矿选冶联合工艺研究

采用选冶联合工艺对含铜1.53％、氧化率47.06％、结合率21.57％的高结合率氧化铜矿进行回收.原矿的砂光片分析结果表明,矿石中大部分铜矿物嵌布粒度极细,多呈星点状和不均匀浸染状分布,与硅、钙、镁、铝等脉石共生严重,导致浮游性较差.针对该矿石的特点,研究了工艺参数及流程结构对指标的影响,确定了“三次粗选—粗精矿再磨—三次精选”的硫化浮选工艺流程,获得了含铜品位为23.43％、回收率为53.72％的铜精矿.对尾矿的形貌及矿物组成表征发现：铜矿物呈细粒浸染状或被硅酸盐矿物包裹,导致这部分铜损失在尾矿中.在最佳的酸浸工艺条件下,对浮选尾矿进行酸浸试验,获得了相对原矿的浸出率为33.21％的试验指标;铜综合回收率为86.93％.     

某难选低品位铜矿的选矿工艺研究

在不同磨矿细度下,对云南某低品位铜矿原矿进行磨矿细度条件试验及流程对比试验,结果表明采用粗磨入选—粗精矿再磨流程,矿石入选细度70%-200目,可获得铜精矿铜品位22.00%、回收率83.72%的分选指标。     

Flotation technology of refractory low-grade molybdenum ore

Because of the low grade, high oxidation rate and the accumulation of little associated metal sulfide ore in the molybdenum concentrate during flotation, the Qingyang molybdenum ore is difficult to beneficiate. The experimental studies of grinding fineness, the amount of roughing modifier, depressant and collector were completed. In the cleaning process, the contrast experiments of one regrinding, the regrinding and scrubbing, two-stage regrinding was carried. The result shows that the grade of molybdenum ore concentrate is 45.31%, the recovery is 65.98% and the rich ore ratio reaches 20.59% by the regrinding and scrubbing seven cleaning, the regrinding of concentrations from middling of molybdenum-sulfur separation. The regularly-concentrated material from the apparatus was as the middling products. Hence, ideal beneficiation index can be obtained with a rational mineral processing, which offers new beneficiating technology for the refractory low-grade molybdenum ore in China.     

含硫低品位锡尾矿的综合利用

某低品位锡尾矿中锡和硫的品位分别为０．２７％和５．０７％,具有综合回收价值,锡和硫在－０．０２５ ｍｍ粒级的分布率分别为６１．６４％和７６．７４％,综合回收难度较大. 试验结果表明,摇床和磁选均没有显著地选别效果,浮选则可以较好地达到选别的目的;选别工艺上,可先使用浮选预先脱硫,脱硫后进一步选别锡;相对于摇床,浮选能更有效地回收锡;硫化矿的存在会显著影响锡的选别,较为彻底的脱硫可改善锡的浮选指标;使用三段浮选脱硫工艺,硫的脱除率可达９０％以上;脱硫的过程中会损失部分的锡,可通过对硫粗精矿再磨后,完成锡和硫的进一步分离;通过浮选闭路流程,最终可获得硫品位和回收率分别为４２．７１％和８９．８４％的硫精矿,以及锡品位和回收率分别为３．１６％和６０．３７％的锡精矿.     

Improvement of copper–molybdenum ore beneficiation using a combined flotation and biohydrometallurgy method

The authors present the results of analysis of material composition and experimental investigations of acid and biohydrometallurgical leaching of middlings on grain size, pH level, leaching process duration, temperature and slurry density. The rational parameters of flotation and acid-bacterial leaching of middlings providing an efficient release of valuable components from mineral complexes and recovery to flotation concentrate and leaching solution have been determined. A combined flowsheet and a beneficiation process for bulk flotation middlings of copper–molybdenum ore have been suggested, which include middlings grinding, sulfide minerals flotation, bacterial leaching of sulfide flotation tailings, liquid-phase extraction of dissolved copper and electrolysis of re-extraction eluates. The suggested combined method of cleaning of middlings of copper–molybdenum ores beneficiation provides the total copper recovery increase by 0.8% with a reduction of the cost price of saleable material by 0.5%.     

Beneficiation studies on recovery and in-depth characterization of ilmenite from red sediments of badlands topography of Ganjam District,Odisha, India

This paper deals with the recovery of ilmenite mineral from red sediments of badlands topography and suggested flowsheet with material balance. The results of these investigations reveal that the red sediment samples contain 33.2% total heavy mineral, in which ilmenite mineral concentrate is 28.71% (by weight). The ilmenite concentrate recovered from red sediment sample by physical beneficiation process, which included scrubbing, desliming, gravity concentration, magnetic and electrostatic separation, contains 99.41% grade with 97.3% recovery. The ilmenite mineral concentrate recovered from red sediments is also suitable for industrial applications. The characterization studies on ilmenite reveal that the TiO₂ percentage is marginally increasing from 46.69% to 47.86% with increasing magnetic intensity from 0.46 to 1.55 T.     

黑石山铜矿石浮选中抑制剂的研究

在浮选黑石山铜矿石中，使用CaO-YN-2代替CaO作抑制剂，不仅能有效抑制黄铁矿，得到优质铜精矿，而且使精矿中银的品位和回收率都得到上升．明显提高了矿产资源利用率．