共查询到17条相似文献，搜索用时 136 毫秒
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浅谈广东珍珠岩资源,膨化工艺条件和开发应用前景 总被引：1，自引：0，他引：1
古菊云 《有色金属矿产与勘查》1997,6(1):58-62
广东的珍珠岩矿床主要产于粤东中生代火山盆地中，与沸石岩、膨润土密切共生，有多种工业类型，储量巨大，其膨胀性能良好，技术经济指标较先进。目前，广东珍珠岩大都用作建筑材料，随着国民经济建设发展，珍珠岩的应用领域必将不断扩大，深加工技术也将迅速进步，开发利用前景十分光明。 相似文献
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九台营城煤矿区珍珠岩类型多样、种类繁多：按珍珠岩成分和组构可分为强蚀变珍珠岩、流纹构造珍珠岩、流纹构造与珍珠构造互层珍珠岩、含斑晶珍珠岩和硅化珍珠岩;根据珍珠岩蚀变阶段和蚀变产物又可分为未蚀变（正常）珍珠岩、弱蒙脱石化珍珠岩、强蒙脱石化珍珠岩和硅化-蒙脱石化珍珠岩。本区珍珠岩为熔岩喷出地表后,直接进入水中,发生塑状玻璃的水化作用冷凝固结形成。其蚀变过程是在碱性水介质参与下完成的。本区珍珠岩具有随蚀变程度加强而储集性能大大降低的特征。 相似文献
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膨胀珍珠岩新型墙体板材的研制袁楚雄刘汉理张凌燕（武汉工业大学，武汉４３００７０）关键词膨胀珍珠岩墙体材料试验工艺珍珠岩是一种火山喷发的酸性熔岩经急速冷却而成的玻璃质岩石，主要成分为ＳｉＯ２（约占７０％）和Ａｌ２Ｏ３（约占１２％）。其突出物理性能为膨胀... 相似文献
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珍珠岩为一种酸性火山玻璃熔岩,配用不同胶结剂可制成多种珍珠岩制品,具有重量轻、耐腐蚀、隔音好、不燃烧等性能,广泛应用于建筑、化工及国防等领域。辽西地区珍珠岩是辽宁乃至全国重要产地之一,因此研究该地区珍珠岩矿床成因及成矿模式,具有重要的现实意义。在充分收集该地区珍珠岩矿床地质特征基础上,结合前人的研究成果,总结了矿床的时空分布规律,分析了矿床成因,构建了成矿模式。结果表明,辽西地区具有较好的珍珠岩成矿环境条件,需进一步开展矿产资源评价工作。 相似文献
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河南信阳珍珠岩矿床特征及其应用 总被引：2，自引：0，他引：2
戚学祥 《矿物岩石地球化学通报》1997,(Z1)
河南信阳珍珠岩矿床特征及其应用戚学祥（冶金工业部中南冶金地质研究所，湖北宜昌４４３００３）关键词珍珠岩矿床特征应用１矿床特征河南信阳珍珠岩矿床位于桐柏—商城近东西向火山岩带西部上天梯一带。区内出露地层为白垩系陈棚组（Ｋ１ｃ）和周家湾组（Ｋ２ｚ）火山岩... 相似文献
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《吉林大学学报(地球科学版)》2015,(Z1)
以我国河南信阳膨胀珍珠岩为主要轻质骨料,分别采用以碱激发沸石为胶凝材料并通过养护和以碱激发凝灰岩、沸石及硅藻土的混合料为胶凝材料,并通过烧结两种方法制备膨胀珍珠岩外墙保温板。在第一种制备方法中,研究了水玻璃模数、膨胀珍珠岩/胶凝材料、养护制度和成型压力对膨胀珍珠岩外墙保温板性能的影响;在第二种制备方法中,研究了膨胀珍珠岩/胶凝材料、成型压力、烧结温度和时间、膨胀珍珠岩的粒级配比对膨胀珍珠岩外墙保温板性能的影响。结果表明,第一种制备方法的优化条件为:水玻璃模数=1.0、膨胀珍珠岩/胶凝材料=1.50~1.75、养护温度=80℃、养护时间=24 h、成型压力=0.375 MPa,此条件下制备的膨胀珍珠岩外墙保温板的性能为:体积密度=286 kg/m3、抗压强度=0.49 MPa、抗折强度=0.25N/mm2、导热系数=0.073 W/(m·℃)。达到了GB/T 10303-2001 350号并且接近250号合格品的各项指标。第二种制备方法的优化条件为:膨胀珍珠岩/胶凝材料=1.613、压缩比=2、烧结温度=600℃、保温时间=0.5h、1.25~2.5 mm膨胀珍珠岩:0.50~1.25 mm膨胀珍珠岩=7.5:2.5。此条件下制备的膨胀珍珠岩外墙保温板的性能为:密度=236 kg/m3,导热系数=0.068 W/(m·℃),抗压强度=0.61 MPa。达到了GB/T 10303-2001 250号优级品的各项指标。以有机硅为防水剂,采用浸泡法进行了膨胀珍珠岩外墙保温板的防水实验。当样品浸入浓度为1/60的防水剂溶液中10 min,膨胀珍珠岩外墙保温板的吸水率最小,质量吸水率为17.13%,体积吸水率为4.28%。 相似文献
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松辽盆地三台地区下白垩统营城组珍珠岩地质特征与成因 总被引：3，自引：1，他引：2
三台地区北山珍珠岩产于营城组一段,出露面积约0.62 km2, 厚度超过30 m。野外掌子面可见珍珠岩与膨润土、隐爆角砾岩、流纹岩共生。研究区珍珠岩可分为枕状球状珍珠岩、具流纹构造（块状）珍珠岩、角砾状珍珠岩、珍珠质集块岩。珍珠岩中含角闪石和辉石斑晶,基质脱玻化明显,出现球粒结构和微晶(骸晶)结构。珍珠岩与其他岩石的序列关系为珍珠岩-膨润土-隐爆角砾岩-流纹岩。岩相序列关系为侵出相-火山通道相-喷溢相。研究区珍珠岩是水下快速冷却形成的,其形成可以分为3个阶段。第一阶段（塌陷火山湖-爆发阶段）,早白垩世在三台地区形成了陆相塌陷火山湖,并发生火山爆发,形成凝灰岩（水平层理发育）。第二阶段进一步分为3个亚阶段：水下侵出亚阶段,在断陷湖盆中发生火山喷发,由于盆地内水体的骤冷作用,形成大量的珍珠岩（火山玻璃质熔岩）和部分流纹质熔岩;隐爆亚阶段,形成流纹质隐爆角砾岩;喷溢亚阶段,形成流纹岩。第三阶段（部分膨润土化阶段）,在火山喷发间歇期由于大气降水补给的地下水,在碱性条件下对珍珠岩进行水化,但珍珠岩层处于相对封闭条件,没有充分的水介质活动,珍珠岩部分（表层、裂缝处）转化为膨润土。 相似文献
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Classification,shear strength,and durability of expansive clayey soil stabilized with lime and perlite 总被引：1，自引：0，他引：1
An experimental study was performed to investigate the effect of perlite and perlite–lime admixtures on classification, shear strength, and durability properties of an expansive soil containing smectite clay minerals. Two types of mixtures, namely soil–perlite and soil–perlite–lime, were prepared with different percentages of perlite and compacted with standard Proctor energy at their optimum water contents. Samples of 38 mm diameter and 76 mm height for durability tests and square samples of 60 mm edge for shear box test were taken and preserved until test time in a desiccator. Disturbed samples were also taken to determine liquid and plastic limits. The expansive soil shows behavior of fine sand and silt due to pozzolanic reactions in microstructure caused by addition of lime and perlite. Although apparent cohesion of treated soil decreased with increasing amount of perlite for both types of samples, perlite–lime-treated samples had higher apparent cohesion than only perlite-treated samples. Large increments in angle of shearing resistance were obtained with increasing usage of perlite. Samples stabilized with only perlite could not show enough durability at the durability tests based on volumetric stability and unconfined compression strength. However, samples stabilized with lime and more than 30 % perlite proved to have enough durability and shear strength. 相似文献
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In the mining of perlite deposits, controlling the generation of fine particles and the concentration of metals is of outstanding importance to meet the environmental and market requirements. Particle size and chemical purity are conventionally manipulated during the processing of the ore to achieve high product specifications. However, the current practices do not consider a proactive approach that focuses in the in-pit characterisation of the ore that would minimise the environmental impact and optimise the mining process since its early stages. This paper presents a method for the in-pit detection of the perlite ore variability that is related to the generation of fine particles and the elevated concentration of metals. Particle size and chemical purity showed to be dependent on the mineralogical variations of the ore, specifically opal and montmorillonite. Using a portable infrared spectrometer, an index that establishes the relative proportions of these minerals in the perlite ore was created. Such index provided insight into the correlation between mineralogy, fine particles and concentration of metals. Consequently, the index could be used not only for mineralogical determination but also as a predictor of the presence of the main impurities in the perlite ore. These results can be implemented in perlite mining to reduce the generation of waste and can influence the production of high-quality perlite products. 相似文献
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松辽盆地白垩系营城组火山岩脱玻化作用及其储层意义——以盆缘剖面为例 总被引：1，自引：0，他引：1
松辽盆地东南隆起区三台营城组火山岩岩石类型主要为：珍珠岩、流纹岩、隐爆角砾岩、角砾熔岩和凝灰岩等,其脱玻化的岩石类型主要为珍珠岩和流纹岩。在偏光显微镜下,珍珠岩的玻璃质基质的脱玻化现象表现为雏晶、骸晶（微晶）和球粒3种;而流纹岩基质的脱玻化现象则主要表现为球粒。它们发育过程由雏晶-骸晶（微晶）-球粒逐渐增强。脱玻化的发生及其强弱与岩石成分、层位和裂隙发育程度有密切联系。通过实验室测试,珍珠岩经过的脱玻化作用越强,岩石密度越小,反之,越大。岩石密度变化范围为3.13%~8.65%。假设其为封闭体系,密度的减小对应孔隙的增加,说明脱玻化作用能明显改善玻璃质火山岩这一类特殊储层的物性。 相似文献
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M. Król E. Matras W. Mozgawa 《International Journal of Environmental Science and Technology》2016,13(11):2697-2704
In this work, the studies on the formation of zeolites from expanded perlite waste and their use in the sorption process of Cd2+ ions will be reported. Such approach is innovative and has not been investigated elsewhere. The results of the synthesis of zeolites from aluminosilicate waste using hydrothermal method were presented. By-product from the process production of expanded perlite was used as the starting material. Theoretical and practical aspects of Cd2+ ions sorption process onto material synthesized in selected conditions (a material with good sorption capacity can be obtained by 24 h reaction of 1 g of perlite waste in 10 mL of 4.0 M NaOH solution with at 70 °C) will be presented. The atomic absorption spectroscopy has been used as the main method, from which the effective cation exchange capacity as well as the proportion of ion exchange to chemisorption in the sorption process have been determined. Structural analyses of the sample before and after sorption process have been also carried out by the mid-infrared spectra measurement, especially pseudolattice range of the spectra was analyzed in detail in which changes caused by ion exchange of non-tetrahedral ions have been observed. 相似文献
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本文对东准噶尔造山带三塘湖盆地西北缘奥依托浪格地区石炭纪巴塔玛依内山组进行了火山岩地质、岩相学、地球化学特征研究,并结合相关年代学成果,探讨了火山岩成因、形成环境与东准噶尔造山带构造演化。研究认为：该区石炭纪巴塔玛依内山组火山岩具明显的陆相火山岩、双峰式火山岩特征,岩石组合基性端元以玄武岩为主,酸性端元为珍珠岩、英安岩;主量元素特征显示基性端元为钙碱—碱性性质,酸性端元珍珠岩、英安岩分别属于碱性、拉斑性质;微量元素特征显示基性端元相对富集Ba、K、Sr等大离子亲石元素（LILE）,亏损Th、Nb、Nd等高场强元素（HFSE）,酸性端元强烈亏损Ba、Nb、Sr、Sm、Ti等元素,富集K元素;稀土元素显示两端元均为轻稀土元素（LREE）相对富集、重稀土元素（HREE）相对亏损特征;珍珠岩主、微量元素特征与整体具有明显差异。综合研究表明：该双峰式火山岩基性端元来源于地幔岩的部分熔融,酸性端元英安岩来源于基性端元的分离结晶作用,珍珠岩则来源于下地壳的部分熔融;地球动力学背景为俯冲洋壳的拆沉作用,造成软流圈热源上涌,引发地幔岩的部分熔融与岩石圈的伸展减薄,进而诱发下地壳镁铁质岩的减压熔融;构造环境为后碰撞伸展阶段晚期,并指示了板块链式缝合的特点。 相似文献
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松辽盆地东南缘的三台地区营城组火山岩分布广泛,其中一部分为珍珠岩。通过岩石薄片鉴定,挑选了三台地区北山上的6块珍珠岩样品,进行了主量元素、微量及稀土元素分析测试。珍珠岩的主量元素组成表明,它们与流纹岩成分相当,具有高SiO_2、较高(NaO_2+K_2O)、低TiO_2和低CaO含量,属于铝饱和-弱过饱和的钙碱性系列。稀土元素配分模式以轻稀土富集、Eu负异常强烈为特征。在不相容元素蛛网图上,珍珠岩相对于洋脊花岗岩总体上富集大离子亲石元素和轻稀土元素,而明显亏损高场强元素Sr、Nb、Y。在Nb-Y和Rb-(Y+Nb)判别图上,它们分别落入板内和火山弧区。这些结果显示,所研究的珍珠岩应为类似弧后盆地的引张环境。 相似文献