高精度磁法在青海铜峪沟铜矿勘探中的应用

通过研究矿(化)体赋存位置和地层界面的关系,对青海铜峪沟铜矿区实测高精度磁测异常进行了系统解释和认识,将零散的局部异常有机地归位到相应的异常带上,清晰地显示出各异常带的分布特征。采用从已知到未知的原则,以物性磁参数特征为桥梁,根据磁法成果圈定出了找矿有利靶区,经钻探工程验证见到了工业矿体。     

铁尾矿砂混凝土的和易性与强度特点

研究了铁尾矿砂、石的化学成分和矿物组成,并比较了其与常规骨料的级配差别。在此基础上用铁尾矿砂代替天然砂,铁尾矿石代替普通碎石配制混凝土,并在和易性和强度上与普通混凝土进行对比,通过掺加活性掺合料进行配比优化。研究发现,用铁尾矿石和铁尾矿砂分别作粗细骨料,在和易性和强度上可以满足高强泵送混凝土的要求。     

Application of three xanthates collectors on the recovery of nickel and pentlandite in a low-grade nickel sulfide ore using optimum flotation parameters

One of the challenges encountered when processing nickel ore is the presence of other minerals like chalcopyrite, pyrrhotite, pyrite and amphiboles in mineral dressing. Hence, there is need to investigate the selectivity of some collectors at optimum flotation parameters (particle size, milling time, pH and flotation cell) to maximize nickel and pendlandite recovery. Three xanthate collectors, namely potassium amyl xanthate (PAX), sodium isobutyl xanthate (SIBX) and sodium ethyl xanthate (SEX), were investigated in this study. In order to achieve this aim, the physical treatment of nickel sulfide ore and percentage chemical composition of nickel sulfide ore were investigated. The analyses of the concentrates were done using x-ray diffraction (XRD) and x-ray fluorescence spectroscopy (XRF). The optimum nickel and pentlandite recovery was achieved at particle size of 64.73 µm milled for 1.5 h, pH of 9.65 and using a new flotation cell. Also, SEX collector recovered more nickel and pentlandite contents compared to PAX and SIBX collectors when optimum parameters of particle size, milling time, pH and flotation cell were considered. In conclusion, the results showed that the selectivity of SEX is the strongest and will recover more pentlandite in a complex and low-grade nickel sulfide ore.     

A study on separation of Mn and Fe from high-alumina ferruginous manganese ores by the carbothermal roasting reduction process

Carbothermal reduction followed by magnetic separation has been recognized as an effective recovery strategy to achieve separation of Mn and Fe from ferruginous manganese ores (Fe-Mn ores). However, it is difficult to improve the recovery of manganese more than 85% by changing carbothermic roasting reduction and magnetic separation. This work clarified the underlying reason for the poor separation with the magnetic separation process and proposed a promising process for the recovery of Fe and Mn from Fe-Mn ore. The effect of operating variables on recovery and separation of Mn and Fe from Fe-Mn ore is initially investigated during the carbothermic reduction roasting process followed by magnetic separation to reveal the underlying reason for the poor separation from Fe-Mn ores. Then, the stepwise reduction behaviors of the MnO-Fe₂O₃ and MnO-Fe₂O₃-Al₂O₃ systems were investigated to clarify that the formation of composite oxide Mn_1−xFe_xO (0 < x < 0.497) and hercynite (FeO·Al₂O₃) directly caused the poor separation of Fe and Mn from high-alumina Fe-Mn ores. Then, the stepwise reduction roasting behaviors of Mn_1−xFe_xO and FeO·Al₂O₃ were investigated by XRD, SEM-EDS and XPS analysis. After adjusting the experimental parameters, iron-rich products with a Fe recovery of 94.31% and a grade of 85.21% and manganese-rich product with a Mn recovery of 90.05% and a grade of 54.35% are obtained. The mass ratio of Mn/Fe increased to 8.5 in the manganese-rich product.     

全面采矿法在小矿体开采中的应用

介绍了黄背场铅锌矿采用全面采矿法在小矿体开采和探矿中的应用实践,该工艺具有投入少、生产成本低,简单易行等特点,有很强的适应性和实用性。     

黄沙坪铅锌多金属矿的成矿规律及深部找矿远景

众所周知,矿物质的成分是多种多样的,社会的发展和科学的进步需要运用到多重金属矿物质,在专业人员的勘探与挖掘中,发现了黄沙坪铅锌多金属矿,这个矿区中有丰富的有色金属,这个矿的发掘为研究成矿规律提供了物质基础,同时也为深部找矿提供了可靠的依据。本文主要分析黄沙坪铅锌多金属矿的成矿规律及深部找矿远景。     

青海省格尔木市西大滩东多金属矿控矿因素及找矿前景

青海省格尔木市西大滩东多金属矿出露地层主要为早-中三叠世昌马河地层走向呈北西~南东向,与区域构造线方向基本一致。是测区的主要矿源层,为后期矿化提供了物质基础。比较发育的北西向、北西西向逆断层具有明显的多期活动特点,多形成破碎带,为热液活动、成矿元素富集提供了良好空间,对本区矿化起着一定的控制作用,破碎蚀变带控制了土壤异常展布。本文对西大滩东多金属矿控矿因素及找矿前景进行分析探讨。     

浅谈铁尾矿综合利用的现状和问题

为了解决资源利用、环境污染以及安全隐患等问题,介绍了铁尾矿综合利用的目的和意义,针对国内外铁尾矿综合利用的现况,分析探讨了铁尾矿综合利用中存在的问题,对合理有效的利用铁尾矿砂具有重要意义。     

Iron Ore Sintering: Process

Sintering is a thermal agglomeration process that is applied to a mixture of iron ore fines, recycled ironmaking products, fluxes, slag-forming agents, and solid fuel (coke). The purpose of the sintering process is manufacturing a product with the suitable characteristics (thermal, mechanical, physical and chemical) to be fed to the blast furnace. The process has been widely studied and researched in the iron and steelmaking industry to know the best parameters that allow one to obtain the best sinter quality. The present article reviews the sintering process that the mixture follows, once granulated, when it is loaded onto the sinter strand. There, the sinter mixture is partially melted at a temperature between 1300-1480°C and undergoes a series of reactions that forms the sinter cake to be loaded into the blast furnace to produce pig iron.     

Iron Ore Sintering: Environment,Automatic, and Control Techniques

Sintering is a process of agglomeration of iron ore fines, fluxes, recycled products, slag-forming elements, and coke with the purpose of achieving an agglomerated product with the suitable composition, quality and granulometry to be used as burden material in the blast furnace. However, the sintering process accounts for an important percentage of the ironmaking and steelmaking emissions, so the minimization of them will promote environmental and health improvements as well as economical profitability. Automatic and control systems contribute to all these objectives.