云南某高硫铜金矿石选矿实验研究

为了提高云南某高硫铜金矿石中有益金属的综合回收利用率,对其进行了选矿实验研究.该矿石中铜品位为5.14%、硫品位为16.96%、金品位为0.3 g/t.针对其矿石特点,采用浮选混浮铜硫、磁选铜硫分离、重选富集含金铜精矿的浮选-磁选-重选联合工艺流程,最终得到3个精矿产品.闭路实验获得了较好的指标,铜精矿Ⅰ铜品位为28.64%,含金1.21 g/t;铜精矿Ⅱ铜品位为25.31%,含金0.64 g/t,铜总回收率为98.53%;硫精矿中硫品位为39.93%,回收率为46.08%;可计价金的回收率为30.43%.该工艺在不添加石灰的情况下实现了铜硫的高效分离.     

国外某铜铅银钡多金属矿的分离与回收工艺

对国外某铜铅银钡多金属矿进行铜铅混合浮选、抑铅浮铜、浸出、重选等实验研究,最终确定采用铜铅混浮-精矿浸出-尾矿重选的选冶联合工艺流程,实现了铜、铅、银、钡资源的综合回收.结果表明,原矿含铜1.52%、铅7.84%和BaSO_4 29.91%,银品位为243.8 g/t,经混合浮选得混合精矿含铜8.09%、铅47.21%、银1389.4 g/t,回收率分别为85.50%,92.91%,87.93%;在室温(25℃)、浸出剂浓度0.6 mol/L、液固质量比4、浸出时间50 min的条件下浸出,获得了铜、铅、银浸出率分别为84.95%,5.56%,21.04%的浸出液和含铜1.54%、铅64.23%、银1 787.6 g/t的浸出渣.浮选尾矿经摇床重选后得BaSO_4品位为95.37%、回收率为35%的钡精矿.     

川西地区某锂辉石矿选矿试验探讨

对川西某锂辉石矿的矿石特征进行了研究,在此基础上进行了重选试验、浮选试验以及含铁锂辉石精矿再选降铁试验,提出了采用重选加磁选回收钽铌矿物及锡石,浮选回收锂辉石的工艺流程。采用螺旋溜槽粗选、摇床精选得到钽铌和锡石混合精矿,通过磁选可有效分离钽铌矿物和锡石,最终获得精矿品位Ta_2O_5为19.66%、回收率43.78%,SnO_2品位为67.56%、回收率45.53%的指标;采用碳酸钠和氢氧化钠调浆,氧化石蜡皂、环烷酸皂为捕收剂,经一粗二扫的浮选流程可得到精矿品位Li_2O为6.04%,回收率85.88%的较好指标;对含铁锂辉石精矿经过弱磁、强磁选别后,再经酸洗处理,可提高锂辉石精矿品位,降低其铁含量。     

塔吉克氧化铜锡矿的选矿实验

针对氧化铜锡矿嵌布粒度细、共生关系复杂的技术难题,对塔吉克某氧化铜锡矿进行了选矿实验研究. 结果表明,该矿中铜品位为0.89%,锡品位为0.87%,铜氧化率接近100%,锡主要以锡石形式存在. 经多个实验对比分析,最终采用硫化-黄药法回收铜、法尔肯加摇床分级重选法回收锡的选矿流程. 通过闭路实验,得到铜品位15.26%、回收率85.90%的铜精矿及锡品位52.57%、回收率71.30%的锡精矿.     

云南某尾矿综合回收重晶石和萤石试验研究

在物质组成和工艺矿物学研究的基础上对含重晶石32.71%、萤石23.35%的云南某尾矿进行综合回收试验研究,结果表明:以自制BCK为捕收剂,为保证萤石的可浮性用自制抑制剂BFN-3抑制重晶石,采用"混合浮选—优先浮选萤石—再选重晶石"的全浮选闭路工艺流程处理原矿,获得了品位为95.61%、回收率为82.14%的萤石精矿和品位为94.01%、回收率为77.83%的重晶石精矿,实现了资源的综合利用。     

小秦岭含金氧化钼铅矿选矿工艺实验研究

以小秦岭地区含金氧化铅钼矿为研究对象,分别进行了重选实验、混合浮选实验以及优先浮选实验。实验结果表明,优先浮硫化矿—后浮氧化矿工艺路线是可行的,硫化矿浮选指标较为理想,氧化矿浮选钼铅回收率较高,但精矿品位较难提高。     

低品位多金属硫化铜矿石选矿实践

广东大雅硫铁矿,建有一个年处理原矿石4万吨的铜铅硫矿石选矿厂。自一九七八年投产以来,由于加强生产技术管理,重视试验研究,不断改进工艺流程,改混合浮选为铜优先浮选,推广使用丁基铵黑药,应用重铬酸盐法分离铜铅,以选铜为主,综合回收铅硫的浮重联合工艺获得成功。其结果使生产指标不断提高,选矿成本大幅度下降,每吨原矿加工费用由10.92元,降为6.53元,降低40.2％,经济效果显著。目前,铜精矿品位和选矿回收率分别由投产时的10.5％、78％提高到21.6％和89.9％。伴生银在铜精矿     

从陕西某尾矿中回收硫铅金的研究

针对陕西某尾矿中含有可以回收的硫、铅和金等有价元素,结合矿石性质,采用"重选预富集—混合浮选—硫铅分离"工艺对该尾矿进行了综合回收试验,最终获得品位为43.7%,回收率为81.12%的硫精矿和金铅混合精矿,其中铅品位为42.50%,回收率为69.10%,铅精矿中含金18.99g/t,其回收率为39.90%。本研究对类似尾矿的综合利用有一定的参考意义。     

铜硫浮选分离技术与药剂研究进展

硫化铜矿的选别工艺以浮选为主,黄铜矿与黄铁矿可浮性相似是二者难以分离的根本原因。总结了硫化铜矿浮选分离技术的研究现状,介绍了优先浮铜工艺、铜硫混浮-再磨-铜硫分离工艺、分支串流浮选工艺、等可浮工艺和部分优先-混合浮选工艺的特点,综述了硫化铜矿捕收剂和黄铁矿抑制剂的分类及优缺点,并展望了铜硫浮选分离技术与药剂的发展方向。     

磁选技术在车河选矿厂的应用研究

针对车河选矿厂原矿中铁丝、铁块等杂物多、枱浮摇床及+74摇床精矿锡品位较低且铁含量高、细粒级锡石全浮选流程回收率低且药剂消耗量大、锌硫分离尾矿未得到综合利用的问题,开展了原矿除铁试验研究、枱浮摇床给矿及精矿磁选试验研究、+74摇床精矿磁选试验研究、30米脱硫浮选给矿及一次浮锡精矿磁选试验研究、锌硫分离尾矿磁选试验研究等一系列研究,并在生产中得到应用,最终磁出原矿中铁质杂物50 kg/班,减少了流程堵塞及设备磨损;枱浮摇床精矿铁含量由17.1%降至13.2%;+74摇床精矿锡品位由42.5%提高至47.1%、铁含量由23.9%降至11.6%;细粒级锡石回收率提高1.01个三分点;锌硫分离尾矿得到综合回收利用。本次研究效果显著。     

MLA在广东斑岩型锡石矿嵌布特征及赋存状态研究中的应用

利用矿物自动分析系统(MLA)和X射线荧光光谱仪、原子吸收分光光度计等对广东某斑岩型锡矿小于2 mm的原矿进行工艺矿物学研究，考察矿物组成、嵌布粒度、连生及包裹关系。结果表明，锡石主要呈细粒浸染状嵌布于脉石矿物中，嵌布粒度细微，最大粒度约为0.250 mm，最小为0.001 mm，主要集中在0.020?0.090 mm之间，单体解离度仅为9.98%，连生体主要与石英、黄玉连生。约93%的锡石(硬度6.5)被石英(硬度7)、黄玉(硬度8)包裹或与之连生，属难磨难选矿石，原矿伴有少量钼、铋、钨、铜等有价元素。选矿原则流程可确定为优先浮选回收硫化矿(钼、铋、铜、钨)，窄级颗粒分别(或依次)重选回收锡石。     

Beneficiation of Cassiterite and Iron Minerals From a Tin Tailing with Magnetizing Roasting-Magnetic Separation Process

The beneficiation of cassiterite and iron minerals from tin tailings with magnetizing roasting and low-intensity magnetic separation (MR-LMS) process was studied in this work. It showed that the process was effective in recovering the tin and iron values from the refractory ore, produced a high-quality iron concentrate assaying 64.68% Fe with the recovery of 87.47% and a tin-rich middling assaying 4.10% Sn with the tin recovery of 63.55%, from the tin tailing assaying 0.20% Sn and 14.56% Fe. It has been found that the key point of the process was the step of magnetizing roasting, which converted hematite and limonite into magnetite. The separation efficiency of the process closely correlated with roasting temperature, roasting time, lignite addition, and the liberation of cassiterite with the iron minerals.     

Beneficiation of Cassiterite Fines from a Tin Tailing Slime by Froth Flotation

The beneficiation of cassiterite fines from a tailing slime in the Datun concentration plant was studied through a froth flotation process, with the chemical scheme of benzohydroxamic acid as collector, lead nitrate as activator, and pine oil as frother. It was found that tin values are mainly contained in the fine fraction of the sample and cassiterite is mostly associated with iron minerals and calcium minerals, so that the desliming treatment and the addition of dispersants and depressants can not be used as it generally results in the undesired loss of tin values. A novel flotation process with no dispersant and depressant as well as no desliming was developed. It showed that this process was effective in recovering the tin values from the tailing slime assaying 0.18% Sn, and produced a concentrate assaying 3.5% Sn with the recovery of 74.16%. It has been found that pine oil played a significant role in improving the recovery for tin values.     

内蒙古自治区某大鳞片石墨矿浮选工艺研究

针对内蒙古自治区大鳞片石墨进行了浮选工艺研究,通过原矿性质及多个流程方案对比,确定最佳工艺流程为:快速浮选-两次粗选-尾矿再选,得到三种粗精矿,粗精矿精选后指标为:固定碳含量为91.28%,回收率为93.49%,且大于0.15 mm的各粒级产品固定碳含量均高于94%,大鳞片石墨得到最大程度保护。对该地区大鳞片石墨资源的开发利用提供了有利的技术依据。     

某铜矿选矿实验研究

为了开发某铜矿资源,对其进行了可行性实验研究.根据矿石物相分析结果,采用硫化铜与氧化铜混合浮选工艺,并选用新型高效浮选药剂,可获得铜精品位20.29%,收率70.68%的铜精矿.     

云南某含锡多金属硫化矿选矿实验研究

对云南某含锡多金属硫化矿进行了工艺矿物学和选矿实验研究. 结果表明,矿石中铅锌品位低,铅、锌矿物相互交代、包裹,嵌布粒度不均匀,采用优先浮铅、再选锌的原则流程,利用铅矿物与锌、硫矿物间可浮性差异较大的特点,采用石灰、亚硫酸钠和硫酸锌抑制锌、硫,以乙基黄药为铅捕收剂优先浮选铅矿物,选铅尾矿用硫酸铜作活化剂活化闪锌矿选锌;锡矿物与黄铁矿、磁黄铁矿等矿物共生关系复杂,且嵌布粒度较细,选锌尾矿经脱硫浮选后采用重磁联合流程回收锡矿物. 通过闭路实验,得到含铅40.92%、银1610.53 g/t、铅回收率81.25%、银回收率77.03%的铅精矿,锌精矿含锌43.23%、回收率为85.92%,硫精矿含硫42.57%,作业回收率为87.65%,锡精矿含锡42.38%,作业回收率为59.29%.     

Study on flotation performances and adsorption mechanism of 2-carboxyethylphenylphosphinic acid to cassiterite

A novel collector, 2-carboxyethylphenylphosphinic acid (CEPPA), was first used in the flotation of cassiterite. The flotation performances and the adsorption mechanism of CEPPA on cassiterite were investigated by flotation tests, adsorption experiments, zeta potential measurements, Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses. The results indicated that CEPPA had strong collecting power for cassiterite and fluorite over a wide pH range but little on quartz. In the separation of the cassiterite–quartz mixture, a concentrate containing 90.9% SnO₂ was obtained with a recovery of 95.7% at pH 7.0. The cassiterite in the cassiterite–fluorite mixture could be effectively separated using 300 mg/L sodium silicate in conjunction with 60 mg/L CEPPA, and a concentrate with a grade of 90.3% SnO₂ and a recovery of 92.6% was achieved at neutral pH. Zeta potential analysis demonstrated that the adsorption process involved both physical and specific forces. The results of FTIR and XPS further suggested that the four O atoms of CEPPA reacted with the Sn atoms on cassiterite surface, forming a complex which was similar to the Sn–CEPPA precipitate, and hydrogen bonding adsorption could have taken place between the terminal hydroxyl groups and CEPPA anions.     

硝酸型PCB退锡废水回收利用工艺研究

PCB退锡废水含大量锡、铜、铁等重金属以及硝酸等有机、无机酸,具有强腐蚀性,是多年来严重污染环境的废水之一,本文设计了一种硝酸型PCB退锡废水综合回收利用工艺,研究了相关工艺参数对该类废水中主要成分锡的回收率的影响。实验结果表明:锡与碱用量为1∶4(mol/mol),反应温度在98～105℃,反应时间为80 min时,锡的转化率、回收率最高可达98.5%以上。     

响应曲面法优化氧化铜渣浮选提铜工艺

江西某炼铜炉渣含铜量高,具有较高的经济价值。由于该铜渣中铜矿物以氧化矿为主,且硫化矿表面被氧化,直接浮选铜回收率低、经济效益差。通过添加活化剂,活化氧化铜矿物,并利用响应曲面中心复合设计原理对浮选工艺条件进行优化,研究氧化钙、硫化钠、Z-200对浮选效果的响应。结果表明,Z-200用量是影响精矿品位和回收率的主要因素,且各响应因素间存在交互效应,在CaO用量为25 g/t,Na₂S用量为500 g/t,Z-200用量为100 g/t的最优条件下,闭路试验获得精矿平均品位12%,精矿铜回收率为86.57%,采用该浮选优化工艺能获得较好的回收效果。