贵州某低品位含硫铝土矿Al2O3含量为54. 71%，SiO2含量为11. 35%，铝硅比仅为4. 82，且矿石中含硫1. 33%。矿石主要含铝矿物为一水硬铝石，主要含硫矿物为黄铁矿。矿石中有用矿物嵌布粒度较细，脱硫时易产生夹带，因而较难实现有效分选。为高效开发利用该矿石资源，对有代表性矿石进行了脱硫脱硅浮选闭路试验。结果表明: 在磨矿细度为－ 0. 074 mm 占90%时，采用1 粗3 精1 扫脱硫浮选、扫选尾矿经2 粗4 精1 扫脱硅、脱硫精扫选尾矿经2 粗1 精1 扫脱硅闭路流程处理该矿石，获得了硫品位为33. 72%、Al2O3品位为15. 96%、SiO2品位为4. 98%、硫回收率为75. 16%的硫精，l2O3
品位为61. 13%、SiO2品位为7. 39%、铝硅比为8. 27、Al2O3回收率为79. 64% 的铝土矿精矿。1 次磨矿脱硫脱硅浮选，脱硫精扫选尾矿单独脱硅浮选工艺是该矿石处理的高效工艺，对含硫含硅铝土矿
石的分选具有借鉴意义。

关键词：铝土矿；浮选；脱硫；脱硅

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微生物浸出技术是处理低品位硫化镍矿的有效方法之一。硫化镍矿生物浸出技术的研究对象主要包括浸矿菌、浸出机理、浸出工艺及影响因素等。介绍了硫化镍矿生物浸出常用菌种以及近年来开发的高效浸矿菌; 论述了硫化镍矿生物浸出作用机制，即硫化镍矿微生物浸出是在直接和间接共同作用下被氧化溶解，同时也存在“原电池效应”引起的电化学氧化作用，在此基础上综述了硫化镍矿生物浸出机理的研究进展; 总结了培养基、矿浆温度、矿浆pH 值、矿浆浓度、表面活性剂等因素对低品位硫化镍矿生物浸出的影响; 指出今后应从细菌培育、微生物代谢、浸出强化技术以及工艺条件优化等方面开展低品位硫化镍矿生物浸出技术研究。

关键词：硫化镍矿；生物浸出；作用机制；影响因素

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甘肃某氧化型金矿石金含量为2. 25 g /t，伴生银可综合回收。金主要以独立金矿物形式存在，大部分被载金脉石矿物石英所包裹，少部分以微细粒的形式嵌布在黄铁矿、磁黄铁矿、闪锌矿、黄铜矿和方铅矿等矿物的裂隙中。为高效开发利用该矿石资源，对其进行了选冶联合试验研究。结果表明: 在磨矿细度为－ 0． 074 mm 占73. 00%条件下，经1 粗1 精2 扫浮选、浮选尾矿重选的闭路流程可获得金品位74. 2 g /t、回收率91. 28%的混合金精矿。混合金精矿经石灰预处理后，经氰化钠浸出，获得了金浸出率为96. 52%、金总回收率为88. 10%的指标。试验结果对同类型金矿石的选矿回收具有借鉴意义。

关键词：氧化型金矿石；活化浮选；重选；氰化浸出；选冶联合工艺

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为了更加精确地研究压力型锚索的锚固机理，通过FLAC3D软件对地震作用下压力型锚索孔周边岩体的动态应力状态进行了数值模拟，研究了地震作用下锚索孔壁周边岩体梯度变化的弹性模量、梯度变化的泊松比、梯度变化的凝聚力、梯度变化的内摩擦角对砂浆受到的压应力和锚索孔周边岩体受到的剪应力的影响。研究结果表明:梯度变化的弹性模量对锚索孔周边岩体受到的剪应力的影响较大，梯度变化的凝聚力、梯度变化的内摩擦角对砂浆受到的压应力和锚索孔周边岩体受到的剪应力的影响都比较大。研究结果丰富了地震作用下压力型锚索锚固机理内容，可供工程界参考。

关键词：压力型锚索；地震荷载；梯度变化；力学性质

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This assessment focused on five zinc-bearing minerals. The minerals were subjected to a number of analyses including quantitative X-ray diffraction, optical microscopy, leaching tests, and bioaccessibility and toxicity studies. Like a previous comprehensive assessment of five copper-bearing minerals, the purpose of this assessment was to obtain structural and chemical information and to characterize the reactivity of each mineral to various simulated environmental and biological conditions. As in the copper minerals study, analyses were conducted consistent with widely accepted methods. Unless otherwise noted, analytical methods used for this study were identical to those described in the investigation of copper-bearing minerals. Two sphalerite specimens were included in the zinc-minerals set. One sphalerite was recovered from a mine in Balmat, New York; the second came from a mine in Creede, Colorado. The location and conditions of origin are significant because, as analyses confirmed, the two sphalerite specimens are quite different. For example, data acquired from a simulated gastric fluid (SGF) study indicate that the hydrothermally formed Creede sphalerite contains orders of magnitude higher arsenic, cadmium, manganese, and lead than the much older metamorphic Balmat sphalerite. The SGF and other experimental results contained in this report suggest that crystallizing conditions such as temperature, pressure, fluidization, or alteration processes significantly affect mineral propertiesproperties that, in turn, influence reactivity, solubility, and toxicity. The three remaining minerals analyzed for this reportsmithsonite, hemimorphite, and hydrozinciteare all secondary minerals or alteration products of zinc-ore deposits. In addition, all share physical characteristics such as tenacity, density, streak, and cleavage. Similarities end there. The chemical composition, unit-cell parameters, acid-neutralizing potential, and other observable and quantifiable properties indicate very different minerals. Only one of each of these minerals was studied. Had this assessment included multiples of these minerals, geochemical and mineralogical distinctions would have emerged, similar to the results for the two sphalerite specimens.

关键词：校准；化学分析；铜硫化物；发射光谱；无机硫化物

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Continuous basalt fiber is produced by melting basalt rocks at high temperatures and modified according to end-use requirements. Continuous basalt fiber is gaining more popularity than traditional fibers, owing to its chemical, mechanical, and ecological advantages. The basic characteristics of continuous basalt fiber are high durability, high thermal resistance, and compatibility with other materials. Applications of continuous basalt fiber include windmill blades, friction materials, basalt geotextile, car headliners, industrial filets, and fire protection.

关键词：玄武岩纤维；熔化玄武岩；传统纤维；化学；机械；生态优点；高耐用性

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Mining equipment is used to extract natural resources such as metals, coal, and minerals; these include iron ore, titanium, bauxite, and copper; gravel, sand, platinum, gold, coal, and salt, and various non-metallic products. Mining equipment includes trucks, dozers, loaders, borers, coal and core drillers, stationary and portable crushers, dryers, feeders, hydraulic pumps, conveyor belts, and compressors.

关键词：采矿设备；提取；天然资源；卡车；推土机；装载机；蛀虫；煤炭

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自行设计了冻土冻融循环装置,基于此开展不同上边界冻结温度条件下粉质黏土的冻融循环试验.试验结果表明:1)随冻融次数增加,经高温冻结冻融作用和经低温冻结冻融作用当干密度ρd≤1.42g/cm3时试样以压密变形为主,而低温冻结冻融作用后ρd>1.42g/cm3的试样则以膨胀变形为主;第2次冻融作用与第1次冻融作用相比,高温冻结冻融作用后的试样融沉系数α0大幅度降低,而低温冻结冻融作用后的试样α0则表现为增加;随冻融次数增加,α0趋于稳定值α07,且α07随上边界冻结温度的增加而增加.2)当上边界冻结温度高于-2.8℃时(包含-2.8℃),不同干密度土样冻融1次后压缩系数mv均降低,当上边界冻结温度低于-2.8℃ 时,ρd≥1.42g/cm3的试样1次冻融后的mv增大,ρd<1.42g/cm3的试样mv则减小;随冻融次数增加,mv逐渐增大并逐渐趋于稳定值mv7,且mv7随上边界冻结温度的降低而增加. 

关键词：冻融循环；双向冻结-单向融化；融沉系数；融土相对压缩系数

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为了准确地评价矿山巷道开挖面附近围岩的安全性,基于统一屈服准则和增量型本构关系,分段地分析开挖面"空间效应"影响范围内的围岩稳定性;通过算例分析巷道各项安全性指标(即多种屈服准则解如:原岩应力阈值、围岩应力和位移分布、塑性区边界线)受岩石抗剪强度参数以及应力卸载或集中等的影响程度,由现场实测数据验证;为研究受开挖面"空间效应"影响的区段,引入了"虚拟支护阻力",并给出"空间效应"影响段围岩的各项安全性指标的解析解.工程实践表明,本文计算结果符合实际. 

关键词：统一屈服准则；Levy-Mises本构关系；开挖面

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针对鄂尔多斯盆地陇东地区长8油藏微观水驱油机理研究薄弱的现状,以华庆油田长81储层为例,应用真实砂岩微观模型水驱油渗流实验、物性、恒速压汞、核磁共振等测试资料研究了储层微观水驱油特征及驱油效率的影响因素,认为喉道半径大小及分布形态与水驱油渗流规律关系密切.结果表明:长81储层微观渗流路径为均匀驱替、网状-均匀驱替、指状-网状驱替、指状驱替4 类,在同一实验条件下对应的驱油效率依次降低;70%以上的残余油以绕流、油膜状分布;储层物性、孔隙结构、可动流体饱和度均受控于成岩作用,其对水驱油机理的影响具有一致性.总体上,当渗透率>1.5mD、喉道半径>0.5μm、分选系数>0.15、可动流体饱和度>40%、驱替压力增加率>50%、驱替速度>0.012mL/min时,驱油效率增大趋势明显减弱.油藏开发过程中应注重将采油数据和岩心水驱油渗流实验相结合,优选高渗带设计合理的开发工艺、分段开发. 

关键词：水驱油渗流实验；物性；孔隙结构；可动流体饱和度；驱替压力；驱替速度；华庆油田

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