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矿物和玻璃中NaK-边的同步辐射XANES研究 被引量:6
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作者 彭明生 李迪恩 《矿物学报》 CAS CSCD 北大核心 2001年第2期165-168,共4页
本文利用同步辐射的NaK 边X射线近边结构谱 (XANES)研究了含Na矿物NaK 边的特征谱 ,其谱的能量位置随着配位数的增加而增大 ,同时建立了含磷 (P)的钠玻璃中NaK 边的能量 ,随着P的含量增加而增大。由此表明本方法可以作为研究含Na矿物和N... 本文利用同步辐射的NaK 边X射线近边结构谱 (XANES)研究了含Na矿物NaK 边的特征谱 ,其谱的能量位置随着配位数的增加而增大 ,同时建立了含磷 (P)的钠玻璃中NaK 边的能量 ,随着P的含量增加而增大。由此表明本方法可以作为研究含Na矿物和Na玻璃的配位与局部结构的新方法。 展开更多
关键词 钠矿物 玻璃 同步辐射X射线吸收光谱 配位数 NaK-边 能量 局部结构
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Interaction of sulfur with iron compounds in sodium aluminate solutions 被引量:6
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作者 李小斌 李重洋 +3 位作者 彭志宏 刘桂华 周秋生 齐天贵 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第2期608-614,共7页
Reaction behaviors of sulfur and iron compounds in sodium aluminate solutions were investigated. The results show that iron compounds can remarkably remove the S2 but cannot get rid of S2Oc2-, SO^2- and SO4^-2 in sodi... Reaction behaviors of sulfur and iron compounds in sodium aluminate solutions were investigated. The results show that iron compounds can remarkably remove the S2 but cannot get rid of S2Oc2-, SO^2- and SO4^-2 in sodium aluminate solutions. The removal efficiency of S^2- using ferrous compound and ferric compound can reach 86.10% and 92.70% respectively when the iron compounds were added with a molar ratio of 2:1 compared with the sulfur in liquors at 100℃. Moreover, several same compounds are formed in those two desulfurization processes with ferrous or ferric compounds, including erdite, hematite, amorphous ferrous sulfide, polymerized sulfur-iron compounds and ferric sulfate. The major difference between these two processes is that the erdite generated from ferrous compounds at the initial reaction stage will convert to a sodium-free product FeS2 at the subsequent stage. 展开更多
关键词 high-sulfur bauxite sodium aluminate iron compounds DESULFURIZATION MECHANISM
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宝石级A,B翡翠研究 被引量:6
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作者 姚德贤 莫伟基 《中山大学学报(自然科学版)》 CAS CSCD 1996年第5期127-130,共4页
测得翡翠饰品A,B货的平均折射率分别为1.655,1.655.平均密度分别为3.310g/cm3,3.258g/cm3.X光衍射分析B货的玉料有硬玉玉料和钠铬辉石玉料2种.红外光谱、喇曼光谱分析A、B货,均出现典型的... 测得翡翠饰品A,B货的平均折射率分别为1.655,1.655.平均密度分别为3.310g/cm3,3.258g/cm3.X光衍射分析B货的玉料有硬玉玉料和钠铬辉石玉料2种.红外光谱、喇曼光谱分析A、B货,均出现典型的硬玉谱线.B货的红外光谱和喇曼光谱均出现碳氢基团的谱线.电子探针分析B货含大量的碳元素.A。 展开更多
关键词 翡翠 散射谱 扫描电镜 宝石级 铝硅酸盐矿物
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Effect of chemical conditioning on the triboelectrification of coal and mineral particles 被引量:2
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作者 WANG Haifeng CHEN Qingru +3 位作者 ZHANG Xinxi TAN Zhihai WANG Shuai ZHOU Nianxin 《Mining Science and Technology》 EI CAS 2010年第3期421-424,共4页
Chemical conditioning was used to modify the triboelectrification of coal and mineral particles.The chemicals tested included starch,lignin,kerosene,ethanol,acetic acid,salicylic acid,sodium oleate,Sodium Hexametaphos... Chemical conditioning was used to modify the triboelectrification of coal and mineral particles.The chemicals tested included starch,lignin,kerosene,ethanol,acetic acid,salicylic acid,sodium oleate,Sodium Hexametaphosphate(SH),sodium silicate, Sodium Dodecylbenzenesulfonate(SDBS),Sodium Bicarbonate(SB) and ammonia.A high-speed,dry mixing method was employed.The charge-to-mass ratio of the coal and mineral samples,both untreated and treated,was tested using a Faraday cup. Dielectric constants were determined by measuring capacitance.It is found that the selectivity of the additives toward coal or minerals is not consistent.Salicylic acid is the optimal additive to enhance the triboelectrification performance of coal samples.Starch, lignin and sodium oleate are suitable for removal of pyrite.SH,sodium silicate,SDBS,SB and ammonia are suitable additives for the removal of ash-forming minerals. 展开更多
关键词 chemical conditioning TRIBOELECTRIFICATION coal triboelectrostatic separation coal particle mineral particle
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Effects of minerals in ferric bauxite on sodium carbonate decomposition and volatilization 被引量:1
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作者 胡文韬 王化军 +1 位作者 刘欣伟 孙传尧 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第7期2503-2507,共5页
Direct reduction is an emerging technology for ferric bauxite utilization. However, because of sodium volatilization, its sodium carbonate consumption is considerably higher than that in ordinary bauxite processing te... Direct reduction is an emerging technology for ferric bauxite utilization. However, because of sodium volatilization, its sodium carbonate consumption is considerably higher than that in ordinary bauxite processing technology. TG-DSC and XRD were applied to detecting phase transformation and mass loss in direct reduction to reveal the mechanism on sodium volatilization. The results show that the most significant influence factor of ferric bauxite on sodium volatilization in direct reduction system is its iron content. Sodium volatilization is probably ascribed to the instability of amorphous substances structure. Amorphous substances are the intermediate-products of the reaction, and the volatilization rate of sodium increases with its generating rate. These amorphous substances are volatile, thus, more sodium is volatilized with its generation. A small amount of amorphous substances are generated in the reaction between Na2CO3 and Al2O3; thus, only 3.15% of sodium is volatilized. Similarly, the volatilization rate is 1.87% in the reaction between Na2CO3 and SiO2. However, the volatilization rate reaches 7.64% in the reaction between Na2CO3 and Fe2O3 because of the generation of a large amount of amorphous substances. 展开更多
关键词 Na2CO3 decomposition Na2CO3 volatilization ferric bauxite direct reduction
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Influence of silicate anions structure on desilication in silicate-bearing sodium aluminate solution 被引量:4
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作者 刘桂华 张闻 +3 位作者 齐天贵 彭志宏 周秋生 李小斌 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第7期1569-1575,共7页
The structural changes of silicate anions in the desilication process with the addition of calcium hydrate alumino-carbonate were studied by measuring Raman spectra, infrared spectra and corresponding second derivativ... The structural changes of silicate anions in the desilication process with the addition of calcium hydrate alumino-carbonate were studied by measuring Raman spectra, infrared spectra and corresponding second derivative spectra. The results show that the desilication ratio in the solution prepared by the addition of sodium silicate(solution-SS) is much greater than that in the solution by the addition of green liquor(solution-GL), and low alumina concentration in the sodium aluminate solutions facilitates the desilication process. It is also shown that alumino-silicate anions in the solution-GL, and Q^3 polymeric silicate anions in solution-SS are predominant, respectively. In addition, increasing the concentration of silica favors respectively the formation of the alumino-silicate or the Q^3 silicate anions in the solution-GL or the solution-SS. Therefore, it can be inferred that the low desilication ratio in the silicate-bearing aluminate solution is mainly attributed to the existence of alumino-silicate anions. 展开更多
关键词 DESILICATION silicate anion STRUCTURE sodium aluminate solution second derivative spectrum oflR
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Research on mineral processing of low quality kalium-natrium feldspar
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作者 Zhang Lingyan Bu Junfen Lai Weiqiang Tang Huawei Zheng Guangjun 《Engineering Sciences》 EI 2008年第4期36-39,共4页
In light of characteristic of low quality feldspar ores in Wanzai County,Jiangxi Province,steel ball was taken as grinding medium,and selective grinding could make impurity separate from feldspar effectively. Through ... In light of characteristic of low quality feldspar ores in Wanzai County,Jiangxi Province,steel ball was taken as grinding medium,and selective grinding could make impurity separate from feldspar effectively. Through the flow of flotation-desliming-high gradient magnetic separation,the feldspar Concentration 1 was obtained with the yield of 70.19 %,containing Fe2O3 0.17 % and TiO2 0.07 %. The feldspar Concentrate 1 could meet the quality requirement of high-grade construction ceramic. And the slime that was deslimed in the flow was also separated and recovered; the feldspar Concentration 2 was obtained with the yield of 13.18 %,containing Fe2O3 0.31 % and TiO2 0.17 %. The feldspar Concentrate 2 can be used for raw material of low-end ceramic. And gangue,with the yield of 16.63 %,was thrown away in this flow,the separating efficiency was high. Employing this flow could also bring high economy benefit and low influence of pollution to environment. 展开更多
关键词 FELDSPAR FE2O3 GRINDING magnetic separation
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Investigation of the Composition and Structure of Ferrous and Manganese-Ferrous Minerals out of Lake-Marsh Ores
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作者 Chuev Anton Andreevich Nikolai Matveevich Fedorchuk Maria Vladimirovna Petrova 《Journal of Chemistry and Chemical Engineering》 2012年第12期1061-1068,共8页
Minerals which enter lake-marsh ores composition are very diverse. There are two large classes of ores: ferrous and manganese-ferrous ores. Each class is divided into groups according to its mineral composition. In t... Minerals which enter lake-marsh ores composition are very diverse. There are two large classes of ores: ferrous and manganese-ferrous ores. Each class is divided into groups according to its mineral composition. In this investigation, ferrous ore sample (Chagodostcha) and manganese-ferrous ore samples (Totyma-2 and Mologa-2) were considered. All samples in the initial state are contaminated with a-quartz and Ab-An feldspars. Thus for purification of the samples, direct flotation method with kerosene agent were used. As a result, almost all impurities were removed from the samples. With the X-ray diffraction method, the authors identified following phases: goethite (ferrous ore) and birnessite (manganese-ferrous ores). Also, the authors used electron probe microanalysis of the original and purified probes and it showed the presence of such impurities as Ca, K, Mg and Ba in birnessite from the manganese-ferrous ores, and AI and Mn impurities in goethite from the ferrous ore. All ore minerals are in a nanocrystalline state (crystallite size is about 10 nm). 展开更多
关键词 Lake-marsh ores debye-Sherer method direct flotation nanocrystals GOETHITE birnessite.
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坡缕石/聚丙烯酸(钠)高吸水复合材料的溶胀行为 被引量:12
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作者 栗海峰 范力仁 +3 位作者 景录如 宋吉青 李茂松 田惠卿 《复合材料学报》 EI CAS CSCD 北大核心 2009年第3期24-28,共5页
以水溶液聚合法制备了坡缕石/聚丙烯酸(钠)(PAANa)高吸水复合材料,对复合材料的吸水溶胀性能进行了研究,并采用FTIR对复合材料进行表征。结果表明:10%坡缕石/PAANa复合材料吸蒸馏水和0.9 wt%盐水倍率分别达1666 g/g、115 g/g,较纯PAANa... 以水溶液聚合法制备了坡缕石/聚丙烯酸(钠)(PAANa)高吸水复合材料,对复合材料的吸水溶胀性能进行了研究,并采用FTIR对复合材料进行表征。结果表明:10%坡缕石/PAANa复合材料吸蒸馏水和0.9 wt%盐水倍率分别达1666 g/g、115 g/g,较纯PAANa的724 g/g、58 g/g明显提高;坡缕石/PAANa复合材料具有优异的保水及反复吸水性能;坡缕石/PAANa的吸液倍率随电解质溶液离子强度的升高而降低,降低程度顺序为Al3+>Ca2+>Na+;坡缕石/PAANa复合材料与其他6种矿物/PAANa复合材料相比,吸液性能特别是吸蒸馏水及0.9 wt%盐水性能大幅提高。 展开更多
关键词 坡缕石 矿物/聚丙烯酸() 高吸水复合材料 溶胀行为
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玉石之王——翡翠 被引量:1
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作者 李奇 《中国资产评估》 CSSCI 2004年第6期47-48,共2页
翡翠(jadeite jade)是由学名为硬玉的钠铝硅酸盐矿物组成的粒状、纤维状交织集合体。关于翡翠的命名有多种传说,流传较广的是源于一种名为翡翠鸟羽毛的颜色:“翡,赤羽鸟也;翠,青羽鸟也。”
关键词 翡翠 宝石 硬玉 铝硅酸盐矿物 化学成分
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