共查询到20条相似文献，搜索用时 171 毫秒
1.
在勘探工作的各个阶段上(选择初勘对象,将储量划分为表内矿和表外矿,合理地开发已探明的储量)的矿床评价问题,都与矿石工业品位指标的确定有密切的联系.目前,批发价格仍然是确定矿石品位指标的经济依据.根据这个原则,开采能有盈利的储量,即在工业利用的一定期间能回收基建投资的矿产资源,才算作表内矿量.但是经验证明,根据批发价格确定矿石品位指标的做法,往往导致不良的后果.例 相似文献
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安山岩中的含钢氧化矿石是庐江中生代陆相火山热液型铜矿床的表生变化部分，矿石中矿物共生组合复杂。物性分析结果表明，只有当辉铜矿、铜蓝含量较多时，焙烧对制硫酸铜才是有利的。但焙烧时黄铁矿的氧化分解对制硫酸铜不利．矿石中Ｆｅ２Ｏ３除来自黄铁矿外．还有褐铁矿，可考虑它的综合回收和利用。 相似文献
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香格里拉铜钼多金属矿石中主要的可利用成分为钼、铜,伴生有钨等成分。为在选冶利用中选择合理高效的可利用方法,工艺矿物学研究主要针对矿石中可利用成分和相关伴生成分开展了赋存状态研究,特别是钼、铜金属矿物存在形式及其对选矿利用的影响进行了分析,为最终实现该类型矿石的高效合理利用提供基础依据。选矿实验采用"浮选-磁选-重选"联合工艺流程,获得钼精矿品位52.34%,钼回收率71.32%;铜精矿品位22.68%,铜回收率71.91%;钨精矿品位36.13%,钨回收率57.27%,从而实现了该矿中钼、铜、钨等有用元素的综合回收,验证了工艺矿物学研究结果的正确性。 相似文献
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兰坪砂岩氧化铅锌矿工艺矿物学研究 总被引：5，自引：0，他引：5
孟凡梅 《矿物岩石地球化学通报》1997,(Z1)
兰坪砂岩氧化铅锌矿工艺矿物学研究孟凡梅（昆明冶金研究院，昆明６５００３１）关键词铅锌矿石工艺矿物学兰坪铅锌矿兰坪铅锌矿是我国储量最大的铅锌矿。本次研究直接配合选矿工艺，研究矿区内北厂、架崖山两矿段的砂岩混合矿。１矿石特征矿石化学成分见表１。回收金属品... 相似文献
5.
硫磷铝锶矿是一种以磷为主,伴生有硫、铝、锶及稀土等多种有益组分的综合性矿产资源。本文概要地介绍了对该矿石合理选择,以磷为主综合回收的多种工艺流程方法,为有效地利用这类新矿石,作者对各种有益组分的回收作了大量试验研究并取得许多数据。利用前一工序的废渣作为下道工序的原料连续回收了硫精矿、黄磷、氧化铝、混合氧化稀土、水泥等产品,同时解决了矿石因品位低造成的成本高的问题。 相似文献
6.
采用化学分析、偏光显微镜分析和电子探针分析等对中国某多金属硫化矿中钴的载体矿物种类、含量及嵌布特征进行分析,为该地区钴资源的综合回收利用提供重要的研究依据。研究结果表明,矿石中未见钴独立矿物,钴主要以类质同象的形式赋存于磁黄铁矿和黄铁矿中。可采用合理的选冶联合试验,通过富集磁黄铁矿和黄铁矿达到富集回收钴。研究成果为该地区钴资源的综合回收利用提供了重要依据。 相似文献
7.
论述了兖州矿区18上煤底板煤系高岭岩（土）的地质特征、赋存状态、矿石性质,并在产品研制的基础上,提出了矿石合理的利用途径,为资源的开发利用方向提供了科学依据,为衰老矿井资源综合开采和开发提供了新的出路。 相似文献
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为充分合理开采利用煤炭资源,对鲁村井田周边孤立块段实施探查,查明煤层的赋存状况,确定其可采性。通过对矿井表外孤立块段过断层探查技术与应用实践,解决了矿井表外孤立块段的开采问题,查明了多个可采煤层,扩大了煤炭储量83.8万t,延长了矿山服务年限。 相似文献
10.
伴生银矿石的工艺类型及其可选性特征（下）①李艺（中国有色金属工业总公司矿产地质研究院,桂林５４１００４）３伴生银铜矿石的工艺类型及其可选性特征伴生银铜矿石的工艺类型划分及工艺特征列于表２。３．１易选型矿石该类型矿石只划分一个亚类,即斑铜矿辉铜矿型银铜... 相似文献
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中国铬矿资源2010年保证程度与前景 总被引：2，自引：0，他引：2
至１９９３年底，我国已勘查的铬矿区有５６处，累计探明铬矿石储量１３０５．３万ｔ，主要分布于西藏，新疆，内蒙古等省区，贫矿与富矿（Ｃｒ２Ｏ３〉３２％）大体各占一半，多为中小型矿床，矿床成因主要为岩浆晚期矿床。冶金工业生产不锈钢是铬矿石的最大消费领域，按不锈钢与钢产量比和我国铬矿生产能力测算，２０１０年只能满足国内铬矿石需求量的１５％，其余要靠进口解决。西藏是国内找铬矿的最佳远景区。 相似文献
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Sandrine Baron Ccile Le-Carlier Jean Carignan Alain Ploquin 《Applied Geochemistry》2009,24(11):2093-2101
The identification of metal provenance is often based on chemical and Pb isotope analyses of materials from the operating chain, mainly ores and metallic artefacts. Such analyses, however, have their limits. Some studies are unable to trace metallic artefacts or ingots to their ore sources, even in well-constrained archaeological contexts. Possible reasons for this difficulty are to be found among a variety of limiting factors: (i) problems of ore signatures, (ii) mixing of different ores (alloys), (iii) the use of additives during the metallurgical process, (iv) metal recycling and (v) possible Pb isotopic fractionation during metal production. This paper focuses on the issue of Pb isotope fractionation during smelting to address the issue of metal provenance. Through an experimental reconstruction of argentiferous Pb production in the medieval period, an attempt was made to better understand and interpret the Pb isotopic composition of ore smelting products. It is shown that the measured differences (outside the total external uncertainties of 0.005 (2*sd) for 206Pb/204Pb ratios) in Pb signatures measured between ores, slag and smoke are not due to Pb mass fractionation processes, but to (1) ore heterogeneity (Δ206Pb/204Pbslag-ores = 0.066) and (2) the use of additives during the metallurgical process (Δ206Pb/204Pbslag-ores = 0.083). Even if these differences are due to causes (1) and/or (2), smoke from the ore reduction appears to reflect the ore mining area without a significant disturbance of its Pb signature for all the isotopic ratios (Δ206Pb/204Pbsmokes-ores = 0.026). Thus, because the isotopic heterogeneity of the mining district and additives is averaged in slags, slag appears as the most relevant product to identify ancient metal provenance. Whereas aiming at identifying a given mine seems beyond the possibilities provided by the method, searching for the mining district through analysis of the smelting workshop materials should provide a more appropriate approach in cases where no archaeological evidence of ancient mining is available. Furthermore, smoke Pb isotopic composition does not seem to be significantly affected by the metallurgical process. Paleopollution recorded in peat deposits could help to detect ancient mining production and workshops. Integrated collaboration between mining archaeologists and geochemists appears crucial to achieve this goal. 相似文献
15.
Virginie Renson Nathalie Fagel Nadine Mattielli Serge Nekrassoff Maurice Streel Franois De Vleeschouwer 《Applied Geochemistry》2008,23(12):3253-3266
The ability of inorganic geochemistry to record environmental change and especially human impact has been evidenced by several studies across Europe, especially in peat, where it is possible to record the impact of agriculture, mining and other industries. However, despite the numerous investigations on the impact of ancient human activities such as ore mining and smelting, little attention has been paid to geochemistry as a tool to solve problems of palaeopollution in the surroundings of archaeological sites. This paper presents geochemical evidence of the impact of a possible early Roman road built in SE Belgian peatland. Increased Zn and Pb concentrations suggest that Pb–Zn ores were transported on the road. Lead isotope analyses suggest that these ores are locally derived, being compatible with those found in the nearby Pb–Zn ore deposits from East Belgium. Present results provide direct evidence that East Belgian Pb–Zn ores were already being mined during Roman times, i.e. earlier than previously suspected (i.e. 14th century) and that Zn appears to be relatively immobile here. On a broader scale, it also demonstrates that such an early road already had an impact on the environment in terms of metal pollution. This paper enlarges on the range of possibilities offered by geochemistry in the field of geoarchaeology. 相似文献
16.
REE distribution patterns of the ores and host rocks of the Dzhimidon vein lead-zinc deposit (North Caucasus, Ossetia, Sadon mining district, Russia) have been analyzed to estimate ore sources of hydrothermal deposits. It is established that both types of prevailing rocks of the Sadon Area are involved in the formation of base-metal ores during activation of hydrothermal metasomatic processes in the Jurassic time, the said rocks are Paleozoic granites (the main ore-hosting rocks at the majority of deposits) and Pre- Cambrian schists (specific for only ore-hosting rocks of Dzhimidon deposit). 相似文献
17.
低渗透砂岩型铀矿床增渗方法及其可行性研究 总被引：1，自引：0，他引：1
为满足国内核电快速发展对铀资源的大量需求,解决制约低渗透砂岩型铀矿床原地浸出顺利生产的瓶颈,借鉴在油气田增产、煤气开采及瓦斯治理等方面提高岩体渗透性方法的成功经验,分析这些方法在原地浸出开采中应用的不足,提出了适用于低渗透砂岩型铀矿床原地浸出生产的无临空面深层岩体爆破增渗方法,以提高低渗透赋矿岩层的渗透性。通过初步爆破增渗模型试验,验证了无临空面深层岩体爆破增渗方法的可行性。 相似文献
18.
论东川脉状富铜矿的历史和现实意义 总被引：6，自引：1，他引：6
东川脉状富铜矿在历史上对矿山、对国家曾作出过重大贡献。汤丹厚大的层状铜矿也是５０年代在广泛调查汤丹脉状矿的基础上发现的，从而肯定整个东川矿区层状矿的巨大工业价值。对脉状铜矿的成因，长期以来受着“脉状铜矿由层状铜矿就地取材”转化形成的思想束缚，因而对其评价－研究成果甚少。从脉矿现有的历史资料出发，结合当今的研究成果，认为东川矿区广泛分布含铜大于５％的富脉矿，脉矿与层状矿在伴生元素、稀土配分、硫同位素组成，爆裂测温等方面，二者均有明显的区别。脉铜矿是以深源为主形成的。建议对历史上曾开采，但至今未作详细地质工作的茂麓铜厂尽快予以评价。 相似文献
19.
陕南秦岭山区古采洞之特征及找矿意义 总被引：1，自引：0，他引：1
在搜集古文献和现今有关矿产地之古采洞调查资料分析的基础上,对陕南山区古采洞分布特征及其找矿意义进行了阐述,并根据古文记载的古人开采矿种、位置、矿的赋存状态,提出了找矿方向。 相似文献
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G.G. Lepezin S.A. Kargopolov V.Yu. Zhirakovskii 《Russian Geology and Geophysics》2010,51(12):1247-1256
The raw-material base of the Russian aluminum industry is considered. The raw materials include common (bauxites, nepheline syenites) and uncommon (nepheline ores, synnyrites, anorthosites, power-and-heating plant ashes, kaolines) types of ores. With regard to many criteria (reserves and quality of ores, technology of their processing, etc.), the problem of alumina deficit can be solved by mining sillimanite group minerals Al2SiO5 (wt.%: Al2O3 = 62.9, SiO2 = 37.1), namely, andalusite, sillimanite, and kyanite. Their proved reserves converted to the final product (aluminum) exceed 400 mln tons. This will be enough for more than a hundred years provided that aluminum is produced in the present-day output (4 mln tons in 2008). Almost all deposits can be explored by strip mining, with application of the gravitation, flotation, and electromagnetic separation methods for ore dressing. The alumina content in concentrates reaches 60–62 wt.%. Only high-grade bauxites and the above concentration methods can ensure such a high yield of Al2O3. Sillimanite group minerals can be processed together with nepheline ores by sintering or be used for the direct electrothermal production of silumin and aluminum, excluding the alumina production stage. The latter method is the most promising in Russia. 相似文献