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赋存于茅口组下部含泥质灰岩段的矿体呈似层状、透镜状，长3500－5600m，平均厚4.39-5.15m，矿石品位一般8%-20%，最高可达65％。矿石有原岩型和粘土型两类，粘土型矿石一般呈灰－深灰色，干燥后呈灰白色，硬度1－2，比重1.6-2.3t/m^3，粘性强，可塑性好，透水性强。主要矿物成分有海泡石、石英、方解石、滑石、蒙脱石、伊利石和氟磷石等,矿石富Si、Mg、贫K、Na,CaO、Al2O3含量偏高。早二叠世江南古陆两侧局限（浅）海或海湾环境有利于海泡石沉积。在永顺－石门、安化－浏阳、怀化－浏阳成矿带，具有良好的找矿前景，估计海泡石资源量在3000万吨以上。 相似文献
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水菱镁矿是一种新开发的高镁矿,可以作为阻燃填料使用。水菱镁矿作为单一填料时,阻燃效率较低。为了解决这一问题,使用海泡石(SEP)为协效剂,水菱镁矿(HM)作为阻燃剂,制备SEP-HM/EVA复合阻燃材料。对材料进行了极限氧指数(LOI)、垂直燃烧(UL-94)、锥形量热(CCT)和力学性能测试,研究了海泡石对该复合材料阻燃性能及力学性能的影响。研究结果表明:在水菱镁矿和海泡石总添加量为60%,其中海泡石为9%时,相比于未添加海泡石的复合材料,拉伸强度增加了51.59%,断裂伸长率增加了67.54%,LOI上升了3.5%,垂直燃烧等级均维持在V-0级别,热释放总量(THRR)降低了16.65%,烟释放总量(TSP)降低了22.93%。总的来说,在显著提高复合材料力学性能的同时,海泡石也能较好的提高复合材料的阻燃性能。通过该研究能够对水菱镁矿作为阻燃填料方面的应用提供新的思路。 相似文献
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This paper focuses attention on the some basic aspects of the role of clay fraction of marly soils including palygorskite and sepiolite upon marl behaviour. The clay fraction of marl is generally dominated by palygorskite and/or sepiolite. It is the performance of these clay soil fractions that are the root cause of many of the problems encountered in the use of such soils as load-bearing materials. This makes it necessary to investigate the role of palygorskite and sepiolite on marly soil's performance. In this paper, some geotechnical and geoenvironmental aspects of marl behaviour is investigated and a new definition and classification of marly soils is presented. This classification focuses attention on the presence of palygorskite or sepiolite as the major fraction of marl, which governs its geoenvironmental and geotechnical behaviour. 相似文献
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提供饮水降氟用的海泡石,系陕西省境内所产。矿体呈细脉状、网脉状,产于秦岭群大理岩裂隙中。矿石的矿物成分主要是海泡石和方解石;化学成分以 SiO_2、MgO、CaO 为主;总比表面大,具较强的吸附性。海泡石试样经明矾活化处理后,按照试验选择的降氟条件,对采自高氟地区的饮用水进行交换处理。实验性降氟表明,海泡石能使高氟饮用水降到符合国家规定的饮用水含氟标准。 相似文献
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利用海泡石粘土为吸附载体,对载银抗菌能力进行前期的定性分析.通过控制适当的温度条件,经吸附和离子交换,得到含银离子的无机抗菌剂的母料,同时讨论了表面改性和玻璃固化的思路. 相似文献
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M.L. Francis M.V. Fey H.P. Prinsloo F. Ellis A.J. Mills T.V. Medinski 《Journal of Arid Environments》2007,70(4):588
The soil mantle in Namaqualand is immature in terms of weathering. Despite or even because of this, the diversity and spatial variability of soil physical and chemical properties is exceptionally high and could be fundamental in governing biodiversity and ecosystem function. In arid landscapes, the way the soil sheds, admits, stores, diverts and transmits water is crucially important. Namaqualand's soils possess special features, which modify water infiltration, hydraulic conductivity and subsurface storage and provision of water to plants. These include pedodermal crusts; a natural mulch of surface gravel or desert pavement; water-repellent soils with fingered infiltration of rain water; textural discontinuities at depth; subsurface horizons cemented with silica, calcite, fibrous clays or gypsum; soluble salts that affect plant water uptake osmotically; clay minerals having exceptional water-absorbing capacity and that are unique to arid environments; and a mechanism, in deeper sandy soils, for thermally induced upward transport of water vapour—a kind of nocturnal distillation—that seems to lessen the need for plants to root deeply.Superimposed on this already impressive pedodiversity are the almost ubiquitous heuweltjies—broad, low mounds which add further complexity to fluxes of water, salts, energy and nutrients in the landscape. 相似文献
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It has been assumed that soil pendants form in a similar manner as stalactites, in which innermost laminae are the oldest and outer laminae are the youngest. This study presents a new interpretation for soil pendant development. Pahranagat Valley, Nevada, pendants contain features indicating continued precipitation through time at the clast–pendant contact, implying that the oldest deposits are not always found at the pendant–clast contact, as other studies have assumed. These features include a void at the clast–pendant contact where minerals such as calcium carbonate, silica, and/or fibrous silicate clays precipitate. In addition, fragments of the parent clast and detrital grains are incorporated into the pendant and are displaced and/or dissolved and result in the formation of sepiolite. This study indicates that pendants are complex, open systems that during and after their formation undergo chemical changes that complicate their usefulness for dating and paleoenvironmental analyses. 相似文献
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海泡石活性土对食用菜油的脱色作用 总被引：2，自引：0，他引：2
海泡石粘以活化后,对食用菜油精制脱色效果良好,其活化工艺条件为：活化酸量８％,烘干温度１５０℃,活化温度１００℃,活化时间〉５ｈ液固比３：１。 相似文献
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矿体赋存于二登系下统茅口组含泥质碳酸盐岩段内，呈似层状、透镜状产于风化带中．控矿因素主要为岩石建造、地形及风化带发育程度等；其原始成矿时期(早二叠世晚期)的岩相古地理为低纬度带的相对封闭的浅海或海湾，沉积环境为碱性介质中低能水动力条件环境，成矿物质主要来源于陆源剥蚀．粘土型海泡石矿是由含海泡石的原岩经长期的物理、化学风化改造而成的． 相似文献
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