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张家沟地区磷灰石矿找矿前景分析
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作者 徐忠勋 《内蒙古煤炭经济》 2012年第10期15-16,共2页
文章对辽宁省建平县张家沟地区磷灰石矿的特征及其成因进行探讨。通过野外地质调查和岩石学、矿物学、地球化学的研究,认为本区磷灰石赋存部位呈脉状侵入在片麻岩中,为燕辽期细粒闪长岩和侵入于太古界建平群小塔子沟组变质岩受变质辉长... 文章对辽宁省建平县张家沟地区磷灰石矿的特征及其成因进行探讨。通过野外地质调查和岩石学、矿物学、地球化学的研究,认为本区磷灰石赋存部位呈脉状侵入在片麻岩中,为燕辽期细粒闪长岩和侵入于太古界建平群小塔子沟组变质岩受变质辉长岩中,岩石具有弱磁性,航磁中所显示有规模且规则的低缓异常区是该类矿床良好的找矿标志。因此在这地段或在附近地区,寻找同类型矿床还是有非常大远景。 展开更多
关键词 磷灰石矿 岩浆成因 找矿前景
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改建条件下的《磷灰石》生产联合企业
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作者 П.,АВ 杨若期 《化工矿山译丛》 1990年第2期6-9,共4页
关键词 磷灰石矿 采矿 联合企业
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甘肃省罗家峡磷矿地质特征及矿床成因 被引量:3
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作者 李大民 李生栋 +1 位作者 马正武 王小强 《矿产与地质》 2019年第3期447-453,共7页
位于祁连山东端的甘肃省罗家峡磷矿是一个大型低品位磷矿床。长期以来,赋矿地质体的岩石类型及矿床成因存在着争议。文章从岩石矿物学、岩石化学、矿床学等方面分析了罗家峡磷矿地质特征及矿床成因。结果表明:含矿岩石为角闪石闪长岩,... 位于祁连山东端的甘肃省罗家峡磷矿是一个大型低品位磷矿床。长期以来,赋矿地质体的岩石类型及矿床成因存在着争议。文章从岩石矿物学、岩石化学、矿床学等方面分析了罗家峡磷矿地质特征及矿床成因。结果表明:含矿岩石为角闪石闪长岩,具有酸度、铝质及全碱偏低,而P、Ti、Ca、Mg、Fe等元素含量偏高的特征,属于含角闪石钙碱性花岗岩类;矿体产于岩体顶部及边部,矿石自然类型以角闪石闪长岩型为主,矿石矿物为晶质氟磷灰石,以侵入岩副矿物的形式存在;矿床受侵入岩内接触带控制,属于侵入岩型磷灰石矿床。通过对比,该矿床与长江中下游一带气化热液交代-充填成因的玢岩型铁(磷)矿床存在明显区别,是一种独立的闪长岩型磷灰石矿床。 展开更多
关键词 磷灰石矿 低品位 含矿岩石类型 闪长岩 矿床成因 罗家峡 甘肃
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在上盘下面超前回采时岩石的自然崩落
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作者 К.,ВН 于莹 《化工矿山译丛》 1990年第1期32-34,共3页
关键词 磷灰石矿 上盘 回采 岩石 崩落
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超前回采时上盘岩石的自然冒然
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作者 徐开梁 子彦 《世界采矿快报》 1990年第4期19-20,共2页
在希宾磷灰石矿床的开采中,随着采矿的向深部水平发展,矿山压力的显现强度增加,岩石出现动态形式破坏。这与上盘岩石厚度增加到 H=500~600米以上和所述条件所特有的低纬度水平构造应力有关。沿矿体与覆盖岩石的上部接触带形成有足够长... 在希宾磷灰石矿床的开采中,随着采矿的向深部水平发展,矿山压力的显现强度增加,岩石出现动态形式破坏。这与上盘岩石厚度增加到 H=500~600米以上和所述条件所特有的低纬度水平构造应力有关。沿矿体与覆盖岩石的上部接触带形成有足够长度的超前卸载带,应当有助于减小岩体中的构造应力。 展开更多
关键词 磷灰石矿 上盘岩石 回采 冒落
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Biotribological behavior of ultra high molecular weight polyethylene composites containing bovine bone hydroxyapatite 被引量:3
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作者 LIU Jin-long ZHU Yuan-yuan WANG Qing-liang GE Shi-rong 《Journal of China University of Mining and Technology》 EI 2008年第4期606-612,共7页
Wear particles of ultrahigh molecular weight polyethylene (UHMWPE) are the main cause of long-term failure of total joint replacements. Therefore, increasing its wear resistance or bioactivity will be very useful in... Wear particles of ultrahigh molecular weight polyethylene (UHMWPE) are the main cause of long-term failure of total joint replacements. Therefore, increasing its wear resistance or bioactivity will be very useful in order to obtain high quality artificial joints. In our study, UHMWPE composites filled with the bovine bone hydroxyapatite (BHA) were prepared by the method of compression moulding. A ball-on-disc wear test was carried out with a Universal Micro-Tribometer to investigate the friction and wear behavior of a Si3N4 ceramic ball, cross-sliding against the UHMWPE/BHA composites with human plasma lubrication. At the same time, the profiles of the worn grooves on the UHMWPE/BHA surface were scanned. The experimental results indicate that the addition of BHA to UHMWPE had a significant effect on the biotribological behavior of UHMWPE cross-sliding against the Si3N4 ceramic ball. The addition of BHA powder enhanced the hardness and modulus of elasticity of these composites and decreased the friction coefficients and wear rates under conditions of human plasma lubrication. When the added amount of BHA powders was up to 20%-30%, UHMWPE/BHA composites demonstrated the designed performance of the mechanical properties and biotribological behavior. 展开更多
关键词 UHMWPE HYDROXYAPATITE BIOTRIBOLOGY composite material
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Froth flotation of scheelite – A review 被引量:25
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作者 Nathalie Kupka Martin Rudolph 《International Journal of Mining Science and Technology》 EI CSCD 2018年第3期373-384,共12页
Froth flotation of scheelite has regained new focus since the 2010s and research regarding floatability and reagents has made great progress over the years. The main objective was and remains the selective flotation o... Froth flotation of scheelite has regained new focus since the 2010s and research regarding floatability and reagents has made great progress over the years. The main objective was and remains the selective flotation of scheelite from other calcium-bearing minerals, in particular calcite, fluorite and apatite. Due to similar properties, most attempts have limited success or only specific application(linked to a type of ore or a location). This article aims at reviewing all general physical-chemical information on froth flotation of scheelite, including electrokinetic properties, influence of p H and already existing reagents as well as ones still under examination. It appears that chelating or mixed collectors and modified versions of sodium silicate and quebracho hold great promise for scheelite flotation, while the use of said depressants and/or promoters seems inevitable. 展开更多
关键词 SCHEELITE Froth flotation Calcium-bearing minerals Selectivity challenges Promising reagents
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Studying distribution of rare earth elements by classifiers,Se-Chahun iron ore,Central Iran
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作者 Mohammadali Sarparandeh Ardeshir Hezarkhani 《Acta Geochimica》 EI CAS CSCD 2017年第2期232-239,共8页
The increased production and price of rare earth elements(REEs) are indicative of their importance and of growing global attention. More accurate and practical exploration procedures are needed for REEs, and for other... The increased production and price of rare earth elements(REEs) are indicative of their importance and of growing global attention. More accurate and practical exploration procedures are needed for REEs, and for other geochemical resources. One such procedure is a multivariate approach. In this study, five classifiers, including multilayer perceptron(MLP), Bayesian, k-Nearest Neighbors(KNN), Parzen, and support vector machine(SVM),were applied in supervised pattern classification of bulk geochemical samples based on REEs, P, and Fe in the Kiruna type magnetite-apatite deposit of Se-Chahun,Central Iran. This deposit is composed of four rock types:(1) High anomaly(phosphorus iron ore),(2) Low anomaly(metasomatized tuff),(3) Low anomaly(iron ore), and(4)Background(iron ore and others). The proposed methods help to predict the proper classes for new samples from the study area without the need for costly and time-consuming additional studies. In addition, this paper provides a performance comparison of the five models. Results show that all five classifiers have appropriate and acceptable performance. Therefore, pattern classification can be used for evaluation of REE distribution. However, MLP and KNN classifiers show the same results and have the highest CCRs in comparison to Bayesian, Parzen, and SVM classifiers. MLP is more generalizable than KNN and seems to be an applicable approach for classification and predictionof the classes. We hope the predictability of the proposed methods will encourage geochemists to expand the use of numerical models in future work. 展开更多
关键词 Geochemical exploration of REEs Supervised pattern classification Geochemistry of Se-Chahun ~Central Iran
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