高精度磁法和大功率激电在金矿探测中的应用

根据岩矿石物性特征,测区投入高精度磁测和大功率激电两种方法寻找主矿体。根据负、低磁异常追踪磁性不强的含金矿带、追索控矿破碎带反应的低磁带,圈定具弱磁性的金矿体,根据低电阻率和高极化率圈定原生金矿中伴生的黄铁矿化多金属硫化物等,从而达到寻找主矿体的目的。     

高精度磁测在陕西省秋树坪地区金矿勘查中的应用

高精度磁法测量能够准确地反映与金成矿相关的目标物的磁性变化,认识隐伏的控矿岩体、含矿蚀变破碎带和构造的分布,可以达到间接寻找金矿的目的。通过在秋树坪地区某金矿普查区进行了地面高精度磁测法扫面测量,根据磁法测量结果圈定了中粒、细粒、中细粒角闪辉长岩的岩性接触带,掌握了控矿岩体的分布范围,在矿化带上方表现为正值磁测异常区为主以及正值磁测异常区与负值磁测异常区的接触带,进而缩小了找矿靶区。最终在圈定的重点综合异常区范围内,找到了达到工业品位的金矿石,表明了该方法在金矿勘查中发挥了有效的作用。     

综合地球物理方法在浙江小梅多金属矿产勘查中的应用

地球物理方法在固体矿产,尤其是多金属矿产的勘查中得到广泛的应用。由于多金属矿床通常具有高密度、良导电性和强磁性（尤其是矽卡岩苣型中赋存的磁性矿床）,因而广泛应用重、磁、电方法寻找这类矿产。本文应用高精度磁法和时间域激发极化法对浙江省小梅多金属矿区进行综合研究,并以C7异常区为例,通过磁异常定量计算得到引起C7磁异常的磁性多金属矿体顶板埋深约2m,厚7．28m,磁性体的倾角为60°,倾向306°45′,这个结果与已经探明的小梅铅锌矿的产状相吻合,进而说明综合磁法和电法是本区多金属矿产勘查的有效手段。     

激发极化法在田背金矿普查中的应用

金工业品位很低,对矿物物性无显著影响,但其伴生的金属硫化物常使矿石具有高极化率特点,有利于应用激发极化法找矿。本文介绍了激发极化法在田背金矿普查中的应用效果。     

双湖石墨矿激电异常特征分析及验证

双湖地区石墨矿体赋存于东海岩群班庄组大理岩段,通过开展大功率激电工作,圈定激电异常,并对低阻高极化激电异常特征进行分析,研究石墨矿的激电异常特征,确定矿体的位置及空间赋存状态。经槽探与钻探验证,低阻高极化的激电异常与石墨矿(化)体无论在平面及空间位置都高度吻合,说明激发极化法在该区石墨矿勘査中合理有效。结合石墨矿的激电异常特征,通过开展井中激电推测盲矿体的位置、规模及其延伸情况,为后续工作开展提供了重要依据。     

应用时域激电偶-偶极测深法勘查铜-金矿

多数金矿床和金属硫化物的矿化作用有关,用激发极化法来圈定多金属硫化物的矿化带或富集带间接找金矿具有良好的地球物理前提.青海省祁连山区某地铜矿是一个伴有金、钼等矿产的中型铜矿,应用激电偶极-偶极测深法进行深部矿产的勘探.本文首先应用"等效电阻率法"推导了极化球体在偶极-偶极装置中极化率数学公式,图示说明了偶极-偶极测深原理和电极排列方式,各种模型在拟电断面上极化率异常特征.简述了勘探区地质特征和岩(矿)石电性特征,方法技术和数据处理,同时给出了GDP-32Ⅱ地球物理接收机充电率参数的公式.激电测深结果表明含炭质页岩、蛇纹岩和金-铜矿均具有明显的高极化响应特征,需要结合地质分辨干扰体,深部未圈闭的激电异常经钻探验证见多金属硫化物和铜-金矿脉,偶极激电测深在本区取得了较好地质效果.     

激发极化法在寻找内蒙某隐伏金属矿的应用研究

介绍了内蒙古某金属矿勘探区地质构造,以及激发极化法在该地区的应用.通过对构造带的矿(化)体的激电异常特征的分析,认为该矿区高极化中低阻和高阻中极化的激电异常是一个有效的找矿标志.区内矿(化)体的激电异常较明显,推断此矿床具有良好的成矿前景.     

激发极化法在银山矿区找矿中的应用

激发极化法是以低阻高极化为特征的银铅锌多金属矿找矿中的一种常用的物探方法。银山银铅锌多金属矿区的激电异常大、范围广,且存在高极化岩性等干扰因素,给找矿带来了一定的难度,通过对矿区的地质及地球物理特征的综合分析,认为该矿区的中等电阻率中等极化率异常为有效的找矿标志异常,而非通常的低阻高极化异常,据此设计了三个钻孔对矿致激电异常进行了验证,见到较厚的银铅锌矿体,取得了较好的找矿效果。     

应用时域激电偶极—偶极测深法勘查铜金矿

多数金矿床和金属硫化物的矿化作用有关,用激发极化法来圈定多金属硫化物的矿化带或富集带间接找金矿具有良好的地球物理前提。青海省祁连山区某地铜矿是一个伴有金、钼等矿产的中型铜矿,应用激电偶极-偶极测深法进行深部矿产的勘探。本文首先应用“等效电阻率法”推导了极化球体在偶极-偶极装置中极化率数学公式,图示说明了偶极-偶极测深原理和电极排列方式,各种模型在拟电断面上极化率异常特征。简述了勘探区地质特征和岩(矿)石电性特征,方法技术和数据处理,同时给出了GDP-32Ⅱ地球物理接收机充电率参数的公式。激电测深结果表明含炭质页岩、蛇纹岩和金-铜矿均具有明显的高极化响应特征,需要结合地质分辨干扰体,深部未圈闭的激电异常经钻探验证见多金属硫化物和铜-金矿脉,偶极激电测深在本区取得了较好地质效果。     

多宝山矿集区斑岩型铜钼矿床岩(矿)石物性特征及其找矿标志

多宝山斑岩型铜钼矿床位于小兴安岭西北部,是中亚-兴蒙造山带北东段最大的斑岩型铜钼矿床,为了分析该矿床岩(矿)石综合物性参数及其之间的相互关系,探讨具有不同地球物理或地质意义的岩石物性参数组合,研究矿床(矿)石物性综合参数特征及其找矿标志,本文收集了大量的密度、磁性、电性资料,同时对该矿床中具有代表性的岩(矿)石进行了采集和测定,通过统计分析认为加里东期成矿岩体(花岗闪长岩、花岗斑岩复合型岩体)具有低密度、高磁特征,奥陶世多宝山组赋矿地层为高密度、低磁特征;对于多宝山斑岩型铜钼矿,重力方法不具备找矿物性前提,磁异常也不具备作为直接找矿标志,但对成矿母岩、成矿构造、矿化蚀变带的识别有重要的作用;主要载矿岩石(蚀变花岗闪长岩、蚀变安山岩质火山岩)具有高极化率、中低电阻率电性特征,而且随着矿石含矿品位提高,极化率值明显增大,形态规则,强度一般为6%～10%的视极化率异常可以作为直接找矿标志。     

Magnetizing roasting mechanism and effective ore dressing process for oolitic hematite ore

Magnetizing roasting of oolitic hematite ore from western Hubei Province was investigated.The mechanism for reduction roasting of oolitic hematite ore was discussed and analyzed.It is found that flash magnetizing roasting-magnetic separation process is a promising approach for the processing of oolitic hematite ore from western Hubei Province.     

Interaction mechanism between carboxylmethyl cellulose and iron ore concentrates in iron ore agglomeration

Carboxylmethyl cellulose(CMC) has become a commercial organic binder in agglomeration of iron ore concentrates. The relative molecular mass and degree of substitution(DS) of CMC have a large impact on its binding performance. The interaction mechanism between CMC and iron ore particles was analyzed through Zeta potential measurements, adsorption measurements and infrared spectra. The results show that the interaction is chemical adsorption-oriented and the CMC's adsorption performance is related to the properties of CMC as well as the type of iron oxides. CMC has a greater affinity to Fe2O3 than Fe3O4, and CMC with higher relative molecular mass shows a higher adsorption isotherm. Pelletization of practical iron ore concentrates added with CMC further illustrates that CMC with higher relative molecular mass or DS exhibits a better binding performance, which is consistent with the results of adsorption tests.     

甘肃小柳沟铜钨矿床矿石特征

从矿石研究入手，论述了矿床的矿石类型、组构、成分以及有用组分赋存状态、连生矿物镶嵌类型．小柳沟铜钨矿床矿石类型以矽卡岩型为主，矿石成分较简单，矿石矿物主要为白钨矿，含量2．34％，粒度多在1-3mm；次为黄铜矿和黄铁矿．矿石有用组分以钨为主，其中w(WO3)1．8795％，w(Cu)0．245％，w(S)1．162％，连生矿物间以平直毗连镶嵌为主，其嵌布均匀度白钨矿52．6，黄铜矿43．9，黄铁矿41．0，均属较均匀嵌布，易选矿石。     

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.     

Thermodynamics of chromite ore oxidative roasting process

To explicate the thermodynamics of the chromite ore lime-free roasting process,the thermodynamics of reactions involved in this process was calculated and the phrases of sinter with different roasting times were studied.The thermodynamics calculation shows that all the standard Gibbs free energy changes of the reactions to form Na2CrO4,Na2O·Fe2O3,Na2O·Al2O3 and Na2O·SiO2 via chromite ore and Na2CO3 are negative,and the standard Gibbs free energy changes of the reactions between MgO,Fe2O3 and SiO2 released f...     

Settling characteristics of ultrafine iron ore slimes

The slurry settling characteristcs are the most important to design a thickener in process industries.In this work,the iron ore slurry from the screw classifier overflow was used for the settling study...     

Comprehensive utilization of kaolin ore accompanying muscovite

In light of the problems of low-quality and low degree of comprehensive utilization of Guangdong muscovite-type kaolin, the reasons affecting the quality of kaolin were found to be a small amount of maroon powdery goethite adhering to the surface of kaolin and minor muscovite affecting the firing whiteness of products. The ores were dealt with by using the new combined process of attritioning-classification-bleaching and flotation. The separation of kaolin from muscovite, quartz and feldspar can come true through the new process. The high-quality kaolin with the firing whiteness of 91% can be obtained, and the muscovite is comprehensively recovered by adopting the key technology of flotation. The content of high-purity muscovite produced is over 99%. The muscovite discarded by original process can be comprehensively recovered.     

氧化铜矿浮选工艺

为有效回收氧化铜矿石中的铜矿物,采用硫化-黄药浮选工艺对某氧化铜矿石进行浮选试验研究.考察了磨矿细度、药剂制度等工艺条件,并进行闭路试验.结果表明采用复合调整剂,复合捕收剂,经两次粗选、两次精选、三次扫选,磨矿细度为-0.074 mm 65%的工艺流程,闭路试验获得的铜精矿Cu品位为20.72%,Cu回收率为94.67%;Au、Ag的回收率分别为81.05%、46.67%.     

几内亚博凯地区红土型铝土矿成矿机理和控矿因素研究

根据在几内亚博凯地区Keveoul铝土矿勘探区所获得的部分地质勘探资料,对该地区红土型铝土矿成矿机理和控矿因素进行了分析.研究表明,其风化剖面大致分为3个特征带,从上至下分别是铁质壳、结核带和密高岭土带,矿石主要分布在铁质壳和结核带中.化学分析表明,铁铝化合物在结核带以上较为富集,二氧化硅在结核带以下含量较高,同时在风化壳的上部,铁-铝有着明显的分离过程,由此可以运用阶段说来探讨母岩通过地球化学元素迁移,最后形成铝土矿床的过程.同时就地貌、水文地质条件等控矿因素对矿床的影响进行了分析.     

矿石布料过程综合自动化系统

针对我国选矿厂矿石布料生产过程运行设备多,生产线长,现场环境恶劣,人工操作难度大,布料系统设备运转率低的特点,结合矿石布料过程的技术要求,提出了由过程管理和过程控制两层结构组成的矿石布料过程综合自动化系统,讨论了系统的结构、功能和控制策略.并将该系统成功应用于酒泉钢铁厂选矿厂矿石布料过程,实现了布料过程的稳定优化运行,取得了明显的应用效果.