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毕节市千溪乡茅口组顶部硅土矿层地质特征及其成因初探
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作者 张华华 李叠 +2 位作者 吴海枝 刘蕾 辛佳艳 《低碳世界》 2023年第6期136-138,共3页
以贵州工程应用技术学院朱昌填图实习区中,产于二叠系茅口组顶部的罕见硅质岩为研究对象,通过对该层位露头的详细岩石学特征、显微组构与X射线衍射(Xˉrays diffraction,XRD)矿物分析,认为其属于较少见的硅土矿层。该层由底到顶具有“... 以贵州工程应用技术学院朱昌填图实习区中,产于二叠系茅口组顶部的罕见硅质岩为研究对象,通过对该层位露头的详细岩石学特征、显微组构与X射线衍射(Xˉrays diffraction,XRD)矿物分析,认为其属于较少见的硅土矿层。该层由底到顶具有“硅化灰岩(Calcite)→燧石(Quartz high)→硬高硅石(Quartz low)→含铝软高硅土(HAlSi_(2)O_(6),即2SiO_(2)+0.5Al_(2)O_(3)+0.5H_(2)O)→钙质生物碎屑硅质岩(Calcite+Quartz low)”的分带特征;因其厚度超过5 m、延伸超过2 km、层位较稳定、SiO_(2)纯度较高、杂质少,是具有一定利用价值的高硅土矿(即粉石英)。因朱昌填图实习区距离相邻玄武岩分布区不远,玄武岩浆喷发期热液活动,或玄武岩形成后的抬升-风化-分解产物,均可在实习区形成硅质岩。因此,结合地质背景推测硅土矿的原岩为与峨眉山玄武岩有关的硅质岩。 展开更多
关键词 硅土矿 茅口组顶部 峨眉山玄武岩 成因分析
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用块状硅土矿制备超细硅质填料 被引量:1
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作者 石和彬 《湖北化工》 1999年第5期21-22,共2页
块状硅土矿是一种由隐晶质石英组成的松软硅质岩,通过气流粉碎与表面改性制备出的活性超细石英粉是一种优质的橡塑填料。
关键词 硅土矿 超细粉碎 表面改性 填料 橡胶 塑料
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余杭硅土矿特征及其开发应用研究 被引量:4
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作者 蒋叙良 潘建强 李长江 《非金属矿》 CAS CSCD 北大核心 1995年第4期43-45,53,共4页
本文简介了浙江省首次发现的余杭硅土矿的地质、物化特征.应用研究证明,该矿硅土是一种优质的天然超细填料和增强剂:用于橡胶中,可替代轻钙和部份炭黑;用于合成塑料中,可替代活性碳酸钙、活性硅灰石等;用于在深色油漆中,可替代... 本文简介了浙江省首次发现的余杭硅土矿的地质、物化特征.应用研究证明,该矿硅土是一种优质的天然超细填料和增强剂:用于橡胶中,可替代轻钙和部份炭黑;用于合成塑料中,可替代活性碳酸钙、活性硅灰石等;用于在深色油漆中,可替代沉淀硫酸钡和滑石粉.用硅土作填料,能提高制品的性能,降低生产成本. 展开更多
关键词 硅土矿 浙江 应用
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福建省硅土矿应用的初步研究 被引量:3
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作者 林知勋 《非金属矿》 CAS CSCD 北大核心 1990年第3期64-64,F003,F004,共3页
福建硅土矿产于石炭系的硅质岩层内。矿石质纯,可用于熔模精密铸造工业上,倘经配矿,亦可用于电焊条的制造。
关键词 硅土矿 熔模 铸造
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硅土矿的特征与工业利用 被引量:3
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作者 蒋叙良 《建材地质》 1995年第4期33-37,46,共6页
本文对一种新的非金属矿产资源——硅土矿的地质、矿物特征和理化性质以及它在工业领域中的利用作了简要叙述,并从矿物成分、粒度、结构构造和化学成分以及成因等方面与粉石英矿作了对比,认为硅土与粉石英是两个不同的工业矿物原料,... 本文对一种新的非金属矿产资源——硅土矿的地质、矿物特征和理化性质以及它在工业领域中的利用作了简要叙述,并从矿物成分、粒度、结构构造和化学成分以及成因等方面与粉石英矿作了对比,认为硅土与粉石英是两个不同的工业矿物原料,硅土是矿物集合体。 展开更多
关键词 硅土矿 工业利用 物特征 地球化学勘探
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浙江硅土及其开发应用 被引量:3
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作者 蒋叙良 李长江 潘建强 《浙江国土资源》 1994年第2期67-75,共9页
本文对浙江首次发现的余杭硅土矿的地质、矿物特征以及物理化学性质作了简要叙述,并概括了硅土、粉石英、硅藻土的基本特征与区别。对浙江硅土的研究与开发应用实践表明,硅土是一种优质的矿物(岩石)填料充填剂、颜料增强剂,已被橡... 本文对浙江首次发现的余杭硅土矿的地质、矿物特征以及物理化学性质作了简要叙述,并概括了硅土、粉石英、硅藻土的基本特征与区别。对浙江硅土的研究与开发应用实践表明,硅土是一种优质的矿物(岩石)填料充填剂、颜料增强剂,已被橡胶、塑料、油漆涂料等工业作填料使用。在橡胶制品中可替代轻质碳酸钙和部分高耐磨碳黑;合成塑料中替代活性碳酸钙、活性硅灰石等;在油漆中替代沉淀硫酸钡和滑石粉。用硅土作填料,具有提高产品的性能和质量,可降低生产成本,增强企业活力。 展开更多
关键词 硅土矿 地质物化特征 开发应用 浙江余杭
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Flotation of low-grade bauxite using organosilicon cationic collector and starch depressant 被引量:7
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作者 余新阳 王浩林 +2 位作者 王强强 冯博 钟宏 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第4期1112-1117,共6页
The flotation of diaspore and three kinds of silicate minerals, including kaolinite, illite and pyrophyllite, using an organosilicon cationic surfactant (TAS101) as collector and starch as depressant was investigated.... The flotation of diaspore and three kinds of silicate minerals, including kaolinite, illite and pyrophyllite, using an organosilicon cationic surfactant (TAS101) as collector and starch as depressant was investigated. The results show that both diaspore and aluminosilicate minerals float readily with organosilicon cationic collector TAS101 at pH values of 4 to 10. Starch has a strong depression effect for diaspore in the alkaline pH region but has little influence on the flotation of aluminosilicate minerals. It is possible to separate diaspore from aluminosilicate minerals using the organosilicon cationic collector and starch depressant. Further studies of bauxite ore flotation were also conducted, and the reverse flotation separation process was adopted. The concentrates with the mass ratio of Al2O3 to SiO2 of 9.58 and Al2O3 recovery of 83.34% are obtained from natural bauxite ore with the mass ratio of Al2O3 to SiO2 of 6.1 at pH value of 11 using the organosilicon cationic collector and starch depressant. 展开更多
关键词 BAUXITE reverse flotation organosilicon cationic collector starch depressant
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Transformation and leaching kinetics of silicon from low-grade nickel laterite ore by pre-roasting and alkaline leaching process 被引量:15
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作者 Wen-ning MU Xiu-yuan LU +2 位作者 Fu-hui CUI Shao-hua LUO Yu-chun ZHAI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2018年第1期169-176,共8页
The mineralogical phase transformation of a low-grade nickel laterite ore during pre-roasting process and the extraction of silicon during alkaline leaching process were investigated.The results indicate that the reac... The mineralogical phase transformation of a low-grade nickel laterite ore during pre-roasting process and the extraction of silicon during alkaline leaching process were investigated.The results indicate that the reaction activity of nickel ores is effectively improved by pre-roasting at650°C for2h,because of the transformation of lizardite into magnesium olivine and protoenstatite.When finely ground ore samples(44-61μm)pre-roasted firstly react with sodium hydroxide solution(60g/L)with a solid/liquid ratio of1:5at140°C for120min,the extraction of silicon can reach89.89%,and the other valuable elements of magnesium,iron and nickel are accumulated in the solid residues.The leaching kinetics of nickel laterite ore can be described successfully by the diffusion through the product layer control model.The activation energy is calculated to be11.63kJ/mol and the kinetics equation can be expressed as1-3(1-x)2/3+2(1-x)=13.53×10-2exp[-11.63/(RT)]t. 展开更多
关键词 low-grade nickel laterite ore silicon extraction mineralogical phase transformation alkaline leaching kinetics
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Effects of different factors during the de-silication of diaspore by direct flotation 被引量:8
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作者 Huang Gen Zhou Changchun Liu Jiongtian 《International Journal of Mining Science and Technology》 SCIE EI 2012年第3期341-344,共4页
Most of the bauxite resources in China are kaolinite-diaspore bauxite of middle to low grade, with a fine dissemination, and are difficultly separated. Direct flotation de-silication has been shown to be an effec- tiv... Most of the bauxite resources in China are kaolinite-diaspore bauxite of middle to low grade, with a fine dissemination, and are difficultly separated. Direct flotation de-silication has been shown to be an effec- tive method for de-silication of diaspore. In this study the effect of different factors, including pulp tem- perature, density, pH value, depressant, and collector dosage, on direct flotation of diaspore were investigated by laboratory experiments. The optimum conditions were identified and the flotation perfor- mance was improved. The results show that under optimum conditions (a pulp temperature around 40℃, a pulp density from 30% to 33g, a pH value from 9.0 to 10.0, an air flow rate of 0.5 m3/(m2 rain), a dispersant level from 35 to 70 g/t, and a collector level around 1000 g/t) an AI/Si ratio of 6.97 is obtained starting from an initial Al/Si ratio of about 4.71. The recovery of A1203 under these conditions was 86.94%. 展开更多
关键词 DiasporeDirect notationDe-silicationFlotation conditions
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Efficient separation of alumina and silica in reduction-roasted kaolin by alkali leaching 被引量:13
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作者 Xiao-bin LI Hong-yang WANG +4 位作者 Qiu-sheng ZHOU Tian-gui QI Gui-hua LIU Zhi-hong PENG Yi-lin WANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第2期416-423,共8页
Alkali leaching was employed to investigate the separation of alumina and silica in roasted kaolin obtained by roasting kaolin alone in air at 1273 K for 60 min and in clinker prepared by roasting the mixed raw meal o... Alkali leaching was employed to investigate the separation of alumina and silica in roasted kaolin obtained by roasting kaolin alone in air at 1273 K for 60 min and in clinker prepared by roasting the mixed raw meal of kaolin,ferric oxide and coal powder with Fe2O3/Al2O3/C molar ratio of 1.2:2.0:1.2 in reducing atmosphere at 1373 K for 60 min.The thermodynamic analyses and alkali leaching results show that the composition of the Al-Si spinel in roasted kaolin is close to that of 3Al2O3·2SiO2 and the spinel is dissolved with increasing leaching time,resulting in difficulty in deeply separating alumina and silica in kaolin by the traditional roasting-leaching process.On the contrary,the efficient separation of alumina and silica in kaolin can be reached by fully converting kaolinite into insoluble hercynite and soluble free silica,namely quartz solid solution and cristobalite solid solution,during reduction roasting,followed by alkali leaching of the obtained clinker.Furthermore,experimental results from treating high-silica diasporic bauxite indicate that the reduction roasting-alkali leaching process is potential to separate silica and alumina in aluminosilicates. 展开更多
关键词 KAOLIN Al-Si spinel HERCYNITE high-silica diasporic bauxite reduction roasting alkali leaching
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Desiliconization kinetics of nickeliferous laterite ores in molten sodium hydroxide system 被引量:6
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作者 牟文宁 翟玉春 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第2期330-335,共6页
A novel process was proposed for treating nickeliferous laterite ores with molten sodium hydroxide.The effect on silicon extraction caused by the factors,such as stirring speed,reaction temperature,particle size and N... A novel process was proposed for treating nickeliferous laterite ores with molten sodium hydroxide.The effect on silicon extraction caused by the factors,such as stirring speed,reaction temperature,particle size and NaOH-to-ore mass ratio,was investigated.The results show that increasing stirring speed,reaction temperature and NaOH-to-ore mass ratio while decreasing particle size increases silicon extraction rate.The desiliconization kinetics of nickeliferous laterite ores in molten sodium hydroxide system was described successfully by chemical reaction control model.The activation energy of the desiliconization process was found to be 44.01 kJ/mol,and the reaction rate based on a chemical reaction-controlled process can be expressed as:1-(1-α) 1/3 = 27.67exp[-44 010/(RT)]t. 展开更多
关键词 nickeliferous laterite ores sodium hydroxide silicon dioxide KINETICS desiliconization
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Effect of Perched Water Tables on Aluminosilicate Stability and Soil Genesis 被引量:4
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作者 ZHANG MIN , GONG ZITONG and A. D. KARATHANASIS College of Resources and Environment, Shandong Agricultural University, Tai’an 271018 (China) Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China) College of Agriculture, U 《Pedosphere》 SCIE CAS CSCD 2000年第3期247-256,共10页
The mineral stability and solute activities of soil solution extracted from selected horizons of seven studied pedons of Alfisols in Kentucky, USA, and the relationship between distribution of iron-manganese concretio... The mineral stability and solute activities of soil solution extracted from selected horizons of seven studied pedons of Alfisols in Kentucky, USA, and the relationship between distribution of iron-manganese concretions and the restrictive layers were investigated. The results showed that the genesis and development of these soils and mineral weathering trends were strongly influenced by the depth of bedrock and the presence of perched water tables at lithic (limestone) interfaces due to the dissolution and buffering effect of limestone bedrock. The extractable Mg/Ca ratio as depth function and soil depth above bedrock could be used as indices of weathering and degree of soil development. Maximum iron-manganese concretion accumulation was found to occur in the horizon overlying clay horizon (>40% clay) with a sharp increase in clay content (>10%), which suggested that zones of Fe-Mn concretion accumulation in soils of the Inner Bluegrass Region appeared to be a sensitive genetic indicator of argillic horizons with restrictive permeability. 展开更多
关键词 iron-manganese concretion perched water table soil environment soil genesD
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Extraction of cobalt from laterite ores by citric acid in presence of ammonium bifluoride 被引量:3
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作者 李光辉 饶明军 +2 位作者 李骞 彭志伟 姜涛 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第8期1517-1520,共4页
Citric acid was used to selectively extract cobalt from limonite-type laterite ores in the presence of ammonium bifluoride.The results show that ammonium bifluoride enhances the leaching of cobalt by citric acid,and 8... Citric acid was used to selectively extract cobalt from limonite-type laterite ores in the presence of ammonium bifluoride.The results show that ammonium bifluoride enhances the leaching of cobalt by citric acid,and 84.5% cobalt is extracted from a laterite ore containing 0.13% Co when leached at ambient temperature for 2 h with 30 g/L citric acid and 10 g/L ammonium bifluoride.Pyrolusite is reduced by citric acid during leaching,cobalt intergrown with which is liberated and subsequently chelated by the citric acid.The extraction of cobalt is enhanced in the presence of ammonium bifluoride because the matrix of silicate minerals is destroyed by ammonium bifluoride and the adsorbed cobalt is subsequently liberated. 展开更多
关键词 LATERITE COBALT citric acid ammonium bifluoride
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《玛纳斯》史诗中的“乌鲁姆”“克热木”考释 被引量:1
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作者 贾衣肯 《西域研究》 CSSCI 北大核心 2016年第4期122-127,共6页
柯尔克孜族民间史诗《玛纳斯》保留了不少有关古代柯尔克孜人生活的专用名词。本文通过探讨见诸《玛纳斯》史诗居素甫·玛玛依唱本第一部的"乌鲁姆""克热木"两个词的词源,并分析史诗相关内容,认为"乌鲁姆&... 柯尔克孜族民间史诗《玛纳斯》保留了不少有关古代柯尔克孜人生活的专用名词。本文通过探讨见诸《玛纳斯》史诗居素甫·玛玛依唱本第一部的"乌鲁姆""克热木"两个词的词源,并分析史诗相关内容,认为"乌鲁姆""克热木"两词除其他含义,还指古代柯尔克孜人冶铁炼钢、制作兵器不可或缺的原料。其中,"乌鲁姆"源于拉丁语Ferrum一词,意为铁矿;"克热木"则出自古希腊语词Krēmnōz(κρημνó?),指硅土矿(或硅质岩石)。搞清这两个词的含义,对于正确理解史诗内容,进而探讨古代柯尔克孜人冶金、语言等方面问题,有着重要的意义。 展开更多
关键词 “乌鲁姆” “克热木” 《玛纳斯》 硅土矿 柯尔克孜
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