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1.
福建明矾石矿应用于水泥生产的现状及前景 总被引：3，自引：0，他引：3
依据市场调查和生产实际，阐述了福建低品位明矾石矿应用于普通硅酸盐水泥生产的现状和发展前景。通过掺入一定量的南屿明矾石矿，对水泥强度、安定性所产生的影响，提高了水泥生产的经济效益。 相似文献
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通过对南屿明矾石矿的地质特征、开发利用现状及前景进行分析研究,认为低品位明矾石可以开发利用。该矿山如果得到合理开发利用,将产生较大的经济效益和社会经济效益。 相似文献
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《矿物学报》2013,(3)
紫金山金铜矿中火山机构的不同部位具有不同特征的明矾石。本文在野外地质调查工作的基础上,通过岩相学、矿相学、扫描电镜、能谱分析、电子探针、粉晶衍射、热差分析等手段,对紫金山金铜矿中的脉石矿物明矾石的矿物学特征进行了系统研究。明矾石分为岩浆热液、岩浆蒸汽、蒸汽加热三种成因类型。岩浆热液型明矾石呈鳞片状分布明矾石化花岗岩中或呈柱、粒状分布于矿体中;岩浆蒸汽型明矾石多呈脉状分布于矿体上部,晶体呈页片状;蒸汽加热型明矾石呈粉末状分布在潜水面附近。明矾石有多种颜色,与铜矿石矿物共生的明矾石多呈玫瑰色,而蚀变花岗岩中或潜水面附近粉末状的明矾石多呈粉红色、肉红色或灰白色。电子探针显示明矾石化学成分相对理论值具有富Al,贫K、SO3,富Na、Ca、Ba、Ti等微量元素,且火山口附近明矾石含钠较高,而远离火山口的北西矿带及深部含钠较低。粉晶衍射显示北西矿带中明矾石的晶胞参数从火山口由近到远,从浅部到深部,晶胞参数增大。热差分析显示火山口处明矾石的吸热谷较深。这些特征显示火山口附近明矾石形成温度较高,远离火山口的西北矿带及深部明矾石形成温度较低,其形成与潜火山活动有关。 相似文献
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峨嵋叶蜡石矿储量大,矿石类型主要有石英叶蜡石型、硬水铝石叶蜡石型、叶蜡石型、明矾石叶蜡石型等。各类矿石中的叶蜡石经提纯后,测试结果表明它们分别具有不同的多型,其中石英叶蜡石型为2M_1型,硬水铝石叶蜡石型及青灰色、紫红色叶蜡石型为2M_1+1TC(混合)型,明矾石叶蜡石型为1TC(为主)型。本文在对各类矿石及叶蜡石的多型特征进行较详细论述的同时,还对多型与矿石类型的关系及成因发表了看法。 相似文献
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中国明矾石资源及其应用 总被引：7，自引：0，他引：7
中国明矾石矿资源丰富。矿床多产于滨西太平洋造山活化构造带中,属陆相火山岩系中的“热水沉积”矿床,可划分为中低温型及高中温型两种类型。残余岩浆水与大气水混合的热水交代火山岩是重要的成矿机制。我国东南沿海及宁芜 庐枞地区为明矾石的有利找矿远景区。明矾石矿产品之中除明矾外,其深度加工及废料再加工产品均具较高的利用价值,综合利用前景广阔。 相似文献
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浙江省明矾石矿床地质特征及其成因类型 总被引：2，自引：0，他引：2
浙江非金属矿产资源丰富,其中明矾石等5种矿产的储量居全国首位,对明矾石资源的开发利用也居全国前列;但对其的控矿因素、成矿机理、成因类型的研究相对滞后。通过综合分析浙江省境内典型矿床的地质特征、成矿条件与环境,将其分成:火山喷发沉积-热液交代型、火山热液交代型两种类型。 相似文献
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一、前言浙江省明矾石矿资源丰富。随着明矾石综合利用工作的深入开展,尤其是从明矾石中提取钾肥的工业性生产日益重要,明矾石矿的用途和需求量一定会进一步扩大与增长,这就要求我们需要对现有的地质资料加以整理和总结,以便查明其分布规律,明确其找矿方向。本文是根据有关单位的地质资料和我们的工作成果写成的。 相似文献
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明矾石是一种有价值的多元素矿产资源,从中可回收４０多种化工产品。综合利用明矾石是当前明矾石工业研究的一项重要课题。介绍了国内外明矾石综合利用的概况,在陶瓷、水泥、填料和聚合铝的生产领域,明矾石产品正在得到广泛应用。提出了用明矾石制取钾肥和作玻璃工业代用原料的综合利用发展趋势。 相似文献
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明矾石合成4A沸石的试验研究 总被引：3，自引：0，他引：3
以明矾石矿为原料,成功地合成了物理化学性能较好的４Ａ沸石。通过对４Ａ沸石合成的基本原理、工艺条件和主要工作参数的研究,提供了合成４Ａ沸石的新途径,丰富了明矾石矿综合利用的新内容。 相似文献
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Oolitic iron ores are typified, and their morphology and composition are studied. Special attention is focused on the character of distribution of valuable and harmful admixtures and determination of the principal minerals concentrating these elements. As a result of this study, three types of ores are identified, such as “loose” ores, cemented ores with glauconite–chlorite–clay cement, and well-cemented ores with siderite cement. The morphology and composition of the ore oolites are characterized. The forms of occurrence of calcium phosphates (anapaite) and phosphates of rare-earth elements (monazite, cularite) that are related to the harmful phosphorus admixture are described. According to the analysis of the elemental composition, the fractions of (–1…+0.2) and (–1…+0.1) mm in the western and eastern segments, respectively, may be promising for processing. 相似文献
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掺砂水泥土的力学特性研究 总被引：3，自引：0，他引：3
通过室内掺砂水泥土的无侧限抗压强度试验,探讨在不同掺砂量、不同龄期条件下,其无侧限抗压强度发展规律。试验研究表明：在水泥掺量一定的条件下,掺入一定量的砂,可以明显地提高水泥土的强度。当水泥掺量为10%时,掺砂量为50%的水泥土强度达到最佳。而且根据实测的应力-应变曲线,详细地分析了掺砂水泥土的破坏形式为脆性剪切破坏,且随着掺砂量的增加,掺砂水泥土的剪切角逐渐增大。与此同时,还从不同的角度分析了掺砂水泥土无侧限抗压强度增长的原因,从而为工程应用提供了试验数据和理论依据。 相似文献
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GS(Gypsum-Slag)土体硬化剂是一种由水泥、钢渣、矿渣和脱硫石膏及其他外加剂组成的新型土体固化材料。将GS土体硬化剂和水泥两种固化剂固化土作为研究对象,通过室内无侧限抗压强度试验和电镜扫描试验,研究固化土的应力-应变曲线以及土质、固化剂掺量、龄期对固化土力学性能的影响,观察其微观结构,进而对比分析GS土体硬化剂和水泥的特性,并进行现场试验加以验证。研究结果表明:相比水泥土,GS固化土应力-应变曲线存在明显峰值;GS固化土和水泥土的强度均随着掺量和龄期正增长,且GS固化土的长期强度更高;GS固化土和水泥土变形模量分别是其抗压强度的31.11~77.24倍和23.24~71.62倍;GS固化土现场成桩的完整性优于水泥土。相比水泥土,GS固化土具有强度增长快、后期强度高、经济效益好的特点,可较好满足地下工程和路基工程等土体加固应用需求。 相似文献
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Mousa F. Attom 《Environmental Geology》2008,55(4):781-788
Iron filling and iron filling–cement mixture were used to improve the shear strength characteristics of Irbid clayey soil.
For this purpose, five types of Irbid clay soils were obtained and mixed with iron filling and iron filling–cement mixture
at different percentages. Two sets of prepared samples were mixed with the admixture. The first set was prepared by mixing
the soil samples with iron filling alone at 2.5, 5.0, 7.5, and 10% by dry weight of the soil. The second set was prepared
by mixing with iron filling–cement mixture at equal ratio of the same percentages of the first set. An unconfined compression
test was performed in this study to measure the shear strength properties of the soils. The test results showed that the increase
in the percentages of the iron filling and iron filling–cement mixture up to 10% will result in increasing the maximum dry
density of the soil and increase the unconfined compressive strength and the secant of modulus of elasticity of the clayey
soil. Also, the addition of iron filling–cement mixture increased the unconfined compressive strength and secant modulus of
elasticity of the clayey soil higher than the addition of iron filling alone. 相似文献
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The distribution of noble metals has been studied in ores and sulfide concentrates from the Gai, Uchaly, Uzel’ga, Aleksandrinsky, Degtyarsk, and Saf’yanovka deposits. The ores, technological products, and hand-picked monofractions were analyzed with INAA; PGE were determined with kinetic and chromatographic methods after their preliminary chemical separation. The ultraheavy fractions from Au-rich samples were used for examining minerals of noble metals. Phase relations and compositions of ore minerals were studied with an X-ray microprobe and electron microscope equipped with an energy dispersive X-ray analyzer. Gold is associated largely with Fe and Cu minerals (pyrite, chalcopyrite, fahlore) and has been detected as an admixture in Pb, Bi, and Ag tellurides. Pyrite—the major mineral of massive sulfide ores—is the main gold concentrator (up to 20 ppm, ～1 ppm on average). As follows from the results of rational analysis, the concentration of finely dispersed gold in sulfide ores from the studied deposits ranges from 0.8 to 5.0 ppm, i.e., is less than the bulk Au content in the respective samples (0.93–21.2 ppm). Formation conditions of Au-enriched massive sulfide ores were estimated from the homogenization temperature of fluid inclusions in minerals and on the basis of the electrum-argentite-pyrite-sphalerite and electrum-hessite geothermometers, taking into account the sulfur and tellurium fugacities. The appearance of visible gold and tellurides in ores is caused by recrystallization of their fine-grained intergrowths with ore-forming minerals and, likely, by release of isomorphic admixtures contained in sulfides during epigenetic hydrothermal alteration. 相似文献
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针对普通水泥浆流动时间长、早期强度低、可灌性差,在复杂岩体注浆中质量难以保证的问题,提出以普通水泥浆为基浆,对普通水泥浆适当掺加外掺剂进行改良,以调节水泥水化及硬化进程,形成SJP黏度时变性灌浆材料。其特征主要为浆液初始流动性好,浆液黏度增长缓慢,浆液过可泵时间后其黏度将迅速增大,浆液在可泵时间内保持良好的可灌性;浆液流动时间可控,可泵时间到初凝时间间隔短,浆液不易被冲蚀;同时浆液固结体具有前期强度增长快,后期强度高的特点;可以根据不同岩层特点,改变外掺剂的加入量,可以形成与地层良好适应性的灌浆材料。应用结果表明:对于陡倾、宽缝、碎裂岩体,SJP黏度时变性灌浆材料具有良好适宜性,可以作为锚杆灌浆材料,在减少材料用量的同时,可缩短工时,灌注质量满足设计要求。SJP灌浆材料已应用到坝基加固、房屋地基处理、地质灾害治理工程中。 相似文献
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Stabilization of fuel oil contaminated soil—A case study 总被引：1，自引：0，他引：1
Sanjay J. Shah A. V. Shroff Jignesh V. Patel K. C. Tiwari D. Ramakrishnan 《Geotechnical and Geological Engineering》2003,21(4):415-427
Fuel oil contamination brings adverse effect on basic geotechnical properties of foundation soil. The present study pertains to one such case, from the petrochemical complex near Vadodara City in Gujarat State, India. Here, the fuel oil contaminated soil samples exhibit drastic changes in their geotechnical parameters. Noteworthy among such deleterious changes are: decrease in maximum dry density (–4%), cohesion (–66%), angle of internal friction (–23%) and unconfined compressive strength (UCS) (–35%) and increase in liquid limit (+11%). An attempt has been made to stabilize the contaminated soil using various additives viz., lime, fly ash and cement independently as well as an admixture of different combinations. It is apparent from the test results that the stabilization agents improved the geo-technical properties of the soil by way of cation exchange, agglomeration, and pozzuolanic actions. The best results were observed when a combination of 10% lime, 5% fly ash and 5% cement was added to the contaminated soil. The improvement in unconfined compressive strength (UCS), cohesion and angle of internal friction can be attributed to neo-formations such as Calcium Silicate Hydrates (CSH, CSH-1) that coats and binds the soil particles. Formation of stable complex between oil and metallic cations, results in reduction of leachableoil. 相似文献