硫化锌精矿、软锰矿直接浸出及Zn-MnO_2同时电解的研究

中南矿冶学院冶金系继1981年下半年进行的硫化锌精矿与软锰矿直接浸出及锌-二氧化锰同时电解的初步试验之后(详见《中南矿冶学院学报》1982年№1),于1982—1983年又进行了Zn-MnO_2同时电解的条件试验与机理研究,编写了试验报告。1984年4至7月又继续完成了硫化锌精矿与软锰矿直接浸出的各种因素的条件试验及Zn-MnO_2同时电解的全流程试验,获得以下显著效果: 1.采用两段浸出,锌浸出率大于95%,锰浸出率大于98％;采用三段浸出,锌浸出率大于98％,锰浸出率大于99％; 2.浸出液采用先进方法除铁,两段置换净化除杂,获得合格的新液; 3.Zn-MnO_2同时电解,阴极电流效率大于90％,阳极电流效率大于85％。槽电压平均为2.8V,电解节电大于60％。 4.阴、阳极很少析出氢气和氧气,酸雾大大减少。     

Zn(Ⅱ)-NH_3-NH_4Cl-H_2O体系电积锌工艺及阳极反应机理

考察了Ｚｎ（Ⅱ）ＮＨ３ＮＨ４ＣｌＨ２Ｏ体系电积锌过程中温度、电流密度、锌浓度对槽电压和电流效率的影响．发现电流密度和温度对槽电压影响显著．用正交试验确定最佳工艺参数为：温度５０℃,电流密度４００Ａ·ｍ－２．在保证电流效率大于９０％的前提下,电解母液中锌浓度可降到１０ｇ·Ｌ－１以下．电能消耗２４６０ｋＷ·ｈ·ｔ－１锌,氨耗０．２５４ｔ·ｔ－１锌．另外,查明了阳极反应为析氮反应,而不是析氧反应．开发Ｚｎ（Ⅱ）ＮＨ３ＮＨ４ＣｌＨ２Ｏ体系电积锌的新工艺对铸锌渣,湿法炼锌除铁渣等含氯或铁高的锌物料以及氧化锌矿的回收利用具有重大意义     

电合成L-半胱氨酸高活性电极的研制

采用化学修饰和电沉积方法在Ｔｉ表面镀覆一层结合牢固的Ｓｎ层，从而制成钛基锡电极，该电极和Ｐｂ电极比较，对Ｌ－半胱民合成反应，具有更高的电催化活性，电流效率大于９９．０％，电解收率为９８．０％以上，明显优于Ｐｂ电极电解。     

钌电极电解还原法制备铀（IV）的研究

研究了在ＵＯ２（ＮＯ３）２－ＨＮＯ３－Ｎ２Ｈ５ＮＯ３体积中，以镀钌钛网为阳极，钛板为阴极电解还原制备铀（Ⅳ）的方法；探讨了电流密度，肼浓度，铀浓度，硝酸浓度以及隔膜等对铀（Ⅵ）电解还原的影响，确定了电解还原制备铀（Ⅳ）最佳的工艺条件；在隔膜电解时，Ｕ（Ⅵ）的还原率可达１００％，而无隔膜电解还原时，Ｕ（Ⅵ）的还原率为６２％。     

微电解-水解-好氧工艺处理硝基苯废水

采用微电解－水解－好氧工艺进行了硝基苯废水（COD为1200－1600mg.L^-1，色度为300－400倍）处理的试验研究，结果表明：该工艺可有效地去除硝基苯废水中的有机物和色度，COD和色度的总去除率分别达到90％，85％以上，出水水质符合《污水综合排放标准（GB8978－1996）》中二级标准的排放要求。     

葡萄糖成对电解之阳极液制取葡萄糖酸锌的研究

本文研究了葡萄糖成对电解后的阳极氧化产物葡萄糖酸进一步制取葡萄糖酸锌的方法和最佳条件。葡萄糖酸锌的最好收率超过了９０％，为电解氧化葡萄糖进而制取葡萄糖酸锌的工业化提供了依据。     

分时供电条件下锌电解过程电解液酸锌比优化控制

针对分时供电生产所带来的锌电解过程中酸锌比难以控制问题,研究面向电流切换过程中能耗最小的酸锌比最优控制策略。在分析锌电解过程动态反应机理的基础上,通过优化求解新液流量及酸锌比预调节时间,得到酸锌比最优切换轨迹。针对外界扰动造成实际电解液酸锌比偏离最优轨迹的问题,提出一种酸锌比轨迹偏差预测控制方法。研究结果表明:所提出的控制策略能使电解液实际酸锌比快速、准确地跟踪优化设定值,保证锌电解过程稳定、低耗运行。     

制备葡萄糖酸锌的电解法

本文介绍了以葡萄糖为原料，用恒电势电解的方法，直接将葡萄糖氧化为葡萄糖酸，进而制取葡萄糖酸锌的方法。该法工艺流程短、能耗低、副产物少。     

废电池及热镀锌渣同时处理新工艺

中南矿冶学院冶金系与北京冶炼厂合作,于1984年5月至8月在中南矿冶学院对废电池及热镀锌渣进行了同时浸出、净化及锌-二氧化锰同时电解的实验室小型与扩大型试验。共完成了十六周期闭路循环试验,每周期电解液12至24升。通过实验证实:所拟新工艺流程畅通,技术经济指标良好,具有如下显著效果: 1.废电池中二氧化锰及热镀锌渣同时浸出,锌、锰浸出率均大于95％; 2.在同一电解槽中可同时获得二级电锌与γ型电解MnO_2(MnO_2>92％)两种产品;     

用磷铵为原料制备磷酸锌铵和磷酸亚铁铵混合缓溶微肥的工艺研究

本文研究了以磷酸氢二铵、硫酸锌、硫酸亚铁和氨为原料制取锌、铁混合缓溶微肥的最佳工艺条件，认为反应温度应控制在９０℃，Ｐ／（Ｆｅ＋Ｚｎ）摩尔比取１．１，Ｚｎ／Ｆｅ摩尔比取１～２，反应过程应先加硫酸锌而后加硫酸亚铁。硫酸锌和硫酸亚铁由化肥厂废触媒等制取。由最优工艺条件小试结果表明，磷的转化率大于９０％．锌和铁的转化率大于９５％。该产品可作烟草专用肥的基础肥料。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that