从尾矿中回收铁矿物的生产实践

介绍目前生产上采用的几种从尾矿中回收铁矿物的工艺流程和主要回收设备，并对所存在的问题进行了分析。     

从灵宝混汞—浮选厂金尾矿中回收金的工艺研究

小秦岭地区的灵宝县,混汞—浮选厂排放的金尾矿,含金总量相当于中型金矿山。采用单一浮选,重—浮联合,浮选粗精矿再磨浮选或氰化工艺流程能有效地回收尾矿中的金,作业回收率为42％—50％,金精矿品位30g/t以上.     

东鞍山浮选尾矿中铁矿物回收方法的研究

通过对东鞍山浮选尾矿的粒度分布、金属分布、磁性率以及矿物单体解离的测定,确定以尾矿中一56μm粒级作为主要研究对象。对回收尾矿中铁矿物的几种可行试验方案进行了对比分析后,采用复合团聚一磁种法分选细粒铁尾矿。结果表明,可获得精矿品位为58.28％的精矿,作业回收率为57.8％,总回收率可提高15％。     

非金属矿物材料在矿山废水处理中的应用

非金属矿物材料来源广泛,价格低廉,在矿山废水处理领域有着巨大的应用前景。论文介绍了石英、蛭石、高岭土、伊利石、累托石、珍珠岩、电气石、石墨、石灰石、磷灰石等非金属矿物材料在含酸、重金属、氟、有机物等矿山废水处理方面的应用特性及研究进展,并对其发展前景进行了展望。     

充分利用尾矿资源 实现无尾矿山目标——尾矿综合利用在矿山生产中的实践

世界上工业发达国家为了保护矿产资源、维护生态平衡 ,实现采、选生产良性循环 ,把矿产资源的综合利用综合治理和整体利用 ,提出了创建“无尾矿山”的奋斗目标 ,并进行了“无尾选矿”的试验研究 ,围绕尾矿的综合利用 ,以少废、无废为目标 ,改进选矿工艺 ,拓宽尾矿应用领域 ,达到矿山企业降耗增效的目的。从 80年代开始 ,我国对矿产资源综合利用工作加强了宏观管理 ,明确了指导方针 ,标志着我国把尾矿作为“二次资源”开发利用提到了议事日程。上海梅山集团 (南京 )矿业有限公司 (以下简称矿业公司 )是国家大型坑下矿山企业 ,现年产干尾矿 5 …     

我国矿山尾矿资源综合利用现状及对策

我国矿山尾矿资源综合利用面临着严峻的形势,对可持续发展构成了严重的挑战。评述了我国矿山尾矿资源综合利用的现状及存在问题,针对尾矿的特点和分类,提出了尾矿资源综合利用几种有效方法,包括尾矿的二次回收,用作建筑材料、土壤改良剂及微量元素肥料、尾矿复垦植被、充填矿山采空区等。同时指出了矿山尾矿资源综合利用是实现可持续发展的有效途径,并提出了具体的对策和建议。     

某氰化提金尾矿综合回收金的试验研究

论述了采用浮选工艺流程，对某矿山现场生产过程中经过氰化浸金以后、尾矿处理之前的生产尾矿进行了实验室试验研究，通过不同条件和闭路试验研究表明：采用两粗两扫两精的原则浮选工艺流程，取得效理想的金精矿品位试验指标，有效地回收了该氰化尾矿中的有价元素金。     

提高选厂尾矿中有用矿物综合回收效益的途径

分析了影响当前尾矿中有用矿物回收的原因，指出应完善回收工艺，采用高效选别设备，尽量进行简易预选及产品方案的合理确定，以获得最佳经济效益。     

某金矿尾矿提纯石英应用对比试验研究

针对某金矿,在回收金银的基础上,对金银浮选尾矿进行云母和长石浮选,以及提纯石英试验,最终获得SiO2品位99.91%的石英产品。提纯石英产品与比利时矽比科矿业有限公司石英产品进行对比试验,通过化学成分、粒度组成、熔制、粘度和热膨胀系数测试对比试验,得出金矿提纯石英达到甚至超过矽比科进口石英产品的各项技术指标。     

Geochemical characteristics of rehabilitated tailings and associated seepages at Kidston gold mine,Queensland, Australia

This study investigated an uncapped tailings storage facility in a semi-arid subtropical climate, with the aim of understanding the hydro-geochemical processes controlling the seepage water quality and the dispersion/attenuation of metals and metalloids within the tailings and through a constructed wetland. While direct re-vegetation helped to stabilize the surface of tailings, development of an oxidation front in the tailings resulted in high sulphate and arsenic concentrations in the seepage. The findings of this study will assist maximizing the efficiency of any future passive treatment system on site and provide useful information for similar tailings closure strategies elsewhere.     

Phytoextraction of gold and copper from mine tailings with Helianthus annuus L. and Kalanchoe serrata L.

To examine the feasibility of gold phytoextraction, and the corresponding uptake of copper that is induced at the same time, field and laboratory scale experiments were carried out using mine tailings from the Magistral mine in Sinaloa State, Mexico. The locally available plant species Helianthus annuus L. (sunflower) and Kalanchoe serrata L. (magic tower) were used in this work, in combination with the chemical amendments: sodium cyanide (NaCN), ammonium thiocyanate (NH₄SCN), ammonium thiosulphate (NH₄)₂S₂O₃, and thiourea [SC (NH₂)₂] to promote gold uptake. The results show that for K. serrata, average copper concentrations were increased to above 4 mg/kg and gold concentrations to above 9 mg/kg in the dry matter of aerial tissues. For H. annuus average copper concentrations were increased to 118 mg/kg in roots, 141 mg/kg in stem and, 119 mg/kg in leaves while average gold concentrations were increased to 15 mg/kg in leaves, 16 mg/kg in roots and, 21 mg/kg in plant stems. Poor health of plants after treatment with chemicals to induce gold uptake could be a function of toxic concentrations of other trace elements such as copper in the plants. Our results confirm that phytoextraction technology can be used to recover precious metals from mine tailings, and that at the current market price for gold, this recovery may be economic. However, our results also highlight the differential response of plant species to copper and gold in the ground, and the importance of choosing the correct chemical to induce metal uptake.     

Growth of selected plant species in biosolids-amended mine tailings

Biosolids stockpiles from sewage treatment plants are a valuable source of organic matter which could be utilized to improve the nutritional status and physical properties of Au mine tailings and support the growth of vegetation planted in the tailings. However, biosolids often contain elevated concentrations of heavy metals including Hg while Au mine tailings would usually contain residual Au. Therefore, it would be beneficial to select plants capable of both tolerating and phytoextracting Hg and/or Au.This paper reports on a glasshouse-based screening study which examined the growth of plant species known for their ability to phytoextract Hg and/or Au which can grow on substrates consisting of biosolids, Au mine tailings, or different combinations of both. The germination and establishment of plants over 8–12 weeks were monitored for Brassica juncea (Indian mustard), Daucus carota (carrot), Lupinus albus (white lupin), Beta vulgaris (sugar beet), Solanum tuberosum (potato), and Manihot esculenta (cassava).Each plant species exhibited differential responses in terms of germination, seedling quality, leaf area, specific leaf area, root and shoot biomass, and percentage dry matter partitioning to the roots. Both the Indian mustard and carrot grew successfully in the biosolids-mine tailings substrate combinations while white lupin, sugar beet, cassava, and potato failed to grow in most of the substrate combinations. The most suitable biosolids-mine tailings combination was determined to be 75% biosolids – 25% mine tailings, wherein most of the abovementioned growth parameters did not differ significantly from those of the plants grown in the control potting mix.     

青海某金矿浮选尾矿环保提金试验研究及实践

青海某金矿矿石性质属典型的难处理金矿,在生产初期处理混合矿石,浮选回收率较低。基于浮选尾矿矿石性质开展CIL环保提金剂浸出试验研究,环保提金剂浸出生产实践表明,浮选尾矿金的浸出率为53.95%,选矿总回收率达到92.7%,浸出生产成本降低6元/t,年经济效益增加378万元,实现了浮选尾矿环保浸出清洁化生产。      

黄金坪金矿建设经验浅析

总结了四川省黄金坪金矿设计与建设的实践经验。重点阐述了首采区的合理选择，开拓方案、采矿方法和选矿工艺流程的确定，限额投资设计与控制，以及工程承包等技术方法和管理措施的应用及其取得的效果     

某金矿难选尾矿工艺矿物学分析

某石英脉型金矿,原矿金品位为7.62g/t,通过重选+浮选的联合选矿工艺选别后,其尾矿中金品位为0.75g/t,总回收率在90.50%左右。为进一步研究尾矿中金的可回收价值,开展工艺矿物学研究,以查明影响金在选别过程中流失的矿物学因素。通过工艺矿物学自动分析仪（BPMA）,扫描电镜（SEM-EDS）,XRD等对尾矿开展工艺矿物学检测分析。结果表明：尾矿中的金矿物主要为自然金,偶见银金矿;金矿物主要以与脉石裸露连生的形式存在;其次包裹于脉石矿物中;还有少量为单体;另有少量以次显微金的形式分布于磁黄铁矿为主的硫化物中;金矿物的粒度极其微细,基本都分布于10μm以下,且有近一半分布于5μm以下。损失的金矿物主要以与脉石连生的形式存在,且粒度十分微细,通过再磨-浮选进一步回收的难度较大,裸露金含量超过60%,可采用堆浸对金回收,以提高金的回收率。     

小型绿色矿山建设研究-河南某小型金矿为例

绿色矿山建设是降低或消除粗放型开采方式对环境破坏，提高应对能源安全及气候变化抗风险值，构建新形势下矿产资源开采高效利用-资源环境友好生态修复的重要举措。目前我国绿色矿山名录中小型矿山数量仅占比9.3%，如何推动小型绿色矿山建设是我国生态文明建设在矿业领域发展的关键。本文通过梳理国际矿业绿色发展理念、我国绿色矿山建设发展历程以及省级绿色矿山建设研究现状，以河南某小型金矿绿色矿山建设为例，介绍了矿山建设现状、重点工程建设以及建设评估结果，结果表明该矿已达到了省级绿色矿山建设标准，进一步明确了省级矿山建设标准对小型矿山的指导意义。通过对我国绿色矿山建设发展研究及案例分析，指出小型绿色矿山建设存在 “生态优先”理念不牢；财务承担风险能力不足；科研投入与改革创新能力欠缺等共性问题，并对如何促进我国小型绿色矿山建设发展提出了建议。     

河南省煤矿瓦斯灾害形势分析及对策措施

河南煤矿瓦斯灾害严重,瓦斯事故多发.针对河南全省煤矿瓦斯灾害的特点,通过对近年来煤矿瓦斯事故的分析,查找和剖析了瓦斯防治工作中存在的薄弱环节和突出问题,从理念、规划、措施、培训、科技、执法等方面提出了针对性对策措施和建议.     

冯家峪铁矿尾矿再选生产实践

简介了尾矿再选试验，依据其试验结果，采用ＨＳ－１６００×８盘式磁选机直接从选矿厂尾矿中回收粗精矿，实现了对尾矿回收再利用。