硅石的抗爆裂性和还原性能测定

介绍了测定硅石抗爆性和还原性能的方法 ,并对测定结果进行了分析讨论。硅石的抗爆性和还原性能取决于硅石的晶粒度 ,晶粒小抗爆率高 ,还原性能好。生产得出 ,冶炼 75 %硅铁时 ,1 2 5MVA电炉使用抗爆率为 87%左右的硅石可获得较好的技术经济指标。     

AEC柱前衍生-高压液相色谱-质谱联用法分析混合植物浓缩液中多糖

目的 建立多糖的高压液相色谱串联质谱检测方法, 以提高多糖检测的特异性和准确性。方法 以3-氨基-9-乙基咔唑(AEC)为柱前衍生试剂, 反相C18色谱柱为分离柱, 乙腈和乙酸铵水溶液为流动相, 在波长254 nm处, 用LC-MS/MS同时分析植物及其提取物中多糖。结果 AEC对多糖的衍生效果好, 无副产物产生; 经过衍生化反应的多糖在高压液相色谱中得到了很好的分离; 并用质谱仪对其相对分子量和结构进行了确定。结论 该方法操作简单, 灵敏度和准确度高, 样品的污染和损失风险低, 在植物多糖的结构分析、构效关系等研究上具有重要应用意义。     

塔西地区富烃类还原性盆地流体与砂砾岩型铜铅锌-铀矿床成矿机制

The important Mesozoic-Cenozoic glutenite-type Cu-Pb-Zn-U metallogenic belts are located at the western of Tarim Basin. The large-size Sareke glutenite-type Cu deposit and Wulagen Pb-Zn deposit are in the development period. They still have high potential exploration; however, the metallogenic mechanism is not clear, so that it is difficult for metallogenic prediction and prospecting. The tectonic and geochemical lithofacies show that the basin system including foreland, intermountain and hinterland basins around Southwest Tianshan orogenic belt, has different controls on glutenite-type Cu, Pb-Zn and U deposits. Firstly, the Mesozoic intermontane pull-apart graben basin in Sarekebayi, which is a secondary basin attached to Tuoyun Mesozoic-Cenozoic hinterland basin, is located at the northern of Southwest Tianshan orogenic belt. The Sareke glutenite-type Cu deposit is hosted by amaranthine irony conglomerate in the upper part of the Upper Jurassic Kuzigongsu Formation in this basin. Secondly, Wulagen glutenite-type Pb-Zn deposit is hosted between the upper part of the Lower Cretaceous Kezilesu Group and the bottom of Palaeogene located at the foreland basin of the southern part of Southwest Tianshan orogenic belt. However, Bashibulake large-size glutenite-type U deposit is hosted in the Cretaceous Kezilesu Group of Jiashi foreland basin. Finally, the glutenite-type Cu deposit is hosted in the Oligocene-Miocene and the top of the Palaeogene in the foreland basin system. Tectonic petrography features identifying the hydrocarbon-rich basin fluid include bituminization alteration, bituminization-discolorous alteration, and multiple coupling patterns between cataclastic lithification and bituminization alteration. Nevertheless, the geochemical petrography features include the rich total organic carbon (TOC), and the hydrocarbon-bearing salt-water, gas-liquid-gas/liquid hydrocarbon, light oil and asphalt from organic matter inclusions in the mineral inclusions, and the ore-forming fluids with low and middle salinities, and the orebody of Cu-Ag-Mo intergrowth, and the oxidized facies Cu, sulfured facies Cu and Mo sulfides. Therefore, the metallogenic mechanism of glutenite-type Cu-Pb-Zn-U deposits is clear. Firstly, the hydrocarbon source rocks have given off the hydrocarbon feeders by the sny-faults after tectonic inversion from the strike-slip sag to compressional deformation. Secondly, the tectonic lithofacies zones, including tectonic inversion zones, regional uncomformity, detachment tectonic belts, conglomerates with high porosity and permeability, are the tectonic tunnels for the large-scale migration of hydrocarbon-rich basin fluid. Thirdly, the argillaceous siltstones and gypsum-bearing mudstones from the conglomerates with high porosity and permeability are the signs of tectonic petrography for lithostratigraphic traps. Finally, large-scale hydrocarbon-rich basin fluid and Cu-bearing amaranthine irony conglomerate (oxidized Cu) have multiple-phase fluids and multiple-coupling structure, and maybe the mechanism for the large-scale enrichment mineralization of glutenite-type Cu deposit; the mineralization of brine with lower temperature superimposed by hydrocarbon-rich basin fluid maybe the mechanism for the enrichment mineralization of glutenite-type Pb-Zn deposit; the multiple mixing of hydrocarbon-rich basin fluid and the reduction of oxidized U maybe the mechanism for the enrichment mineralization of glutenite-type U deposit.     

中国西部弱还原性煤的结构特征初步研究

对中国西北地区弱还原性、高惰质组煤结构特征进行了初步研究．与同变质程度的其他成煤时代煤相比,中国西北侏罗纪弱还原性煤普遍具有较低的H／C原子比和较高的O／C原子比,同时其芳碳率和分子结构中环缩合程度相对较高．随惰质组含量增加,弱还原性煤芳碳率和平均缩合环数增高．X射线衍射（XRD）研究表明,惰质组芳环缩合程度更高,芳香层片在空间的排列更规则,相互定向的程度高于镜质组．核磁共振（^13C—NMR）研究表明,惰质组分子结构中苯环取代更多,脂肪部分所占比例少．对弱还原性煤中广泛分布的惰质组组分及其分子结构特征需进行深入研究．     

概率统计中的关系映射反演方法

关系映射反演方法是用以实现由未知(难、复杂)到已知(易、简单)的一个重要手段,它可以用于概率统计中的问题解决。     

Fe~(3 )-Vc体系的穆斯堡尔研究

用穆斯堡尔方法研究了Fe3 Vc体系中铁离子的价态及冻干粉末中Fe2 与大颗粒晶体中Fe2 的差别。结果表明 :Fe3 Vc溶液结晶后 ,大颗粒晶体中还原得到的Fe2 未被空气氧化 ,但Fe2 有 2种配位环境 ,数量比为 2∶3;冻干粉末中Fe2 绝大部分未变成Fe3 ,自然升温冻干的粉末中以其中一种配位环境为主 ,而控温冻干则以另一种配位环境为主。     

重铬酸钾法测定防锈颜料亚磷酸锌中的亚磷酸根

亚磷酸锌是一种优秀的防锈颜料,广泛应用于涂料行业当中.根据亚磷酸根具有还原性,设计在硫酸介质中,用重铬酸钾溶液氧化亚磷酸根,过量的重铬酸钾用硫酸亚铁铵反滴定,1,10-菲绕啉作为指示剂确定滴定终点.此方法测定亚磷酸根含量,在8～72 mg呈良好的线性关系,检出限为8 mg,相对标准偏差(RSD)＜1.27%,回收率在99.87%～100.22%,方法简便、可靠,可在实际中应用.