配加富矿粉的烧结实验

通过对不同富矿粉搭配的烧结矿性能的研究发现,20%的澳矿+10%的印度粉是一种合理的配矿方案,可显著改善烧结矿的各项性能.     

石钢马来西亚粉烧结性能

对石钢烧结生产配加马来西亚粉的可行性进行了实验和生产跟踪研究。通过实验梯度为5％的单烧试验,分析其对烧结矿利用系数、烧结矿转鼓强度及返矿率等指标的影响。结果显示其冶金性能有所改善,认为在该公司生产条件下配加马来西亚粉烧结是可行的。通过生产跟踪,发现基本符合实验研究的规律,并取得了一定的经济效益。确定其最佳的配比为10％～15％。     

石钢马来西亚粉烧结性能

对石钢烧结生产配加马来西亚粉的可行性进行了实验和生产跟踪研究.通过实验梯度为5%的单烧试验,分析其对烧结矿利用系数、烧结矿转鼓强度及返矿率等指标的影响.结果显示其冶金性能有所改善,认为在该公司生产条件下配加马来西亚粉烧结是可行的.通过生产跟踪,发现基本符合实验研究的规律,并取得了一定的经济效益.确定其最佳的配比为10%～15%.     

铁矿粉烧结液相流动性评价

烧结矿靠流动的液相粘结未熔物获得强度,液相流动能力是铁矿粉的一个烧结基础特性. 本文提出评价铁矿粉烧结过程中液相流动性的两个新指标,即"基于温度分布的液相流动面积"以及"液相流动对温度的敏感性",并给出这两个指标相应的计算式以便正确把握烧结过程液相行为及优化烧结配矿.     

基于铁矿粉烧结基础性能的优化配矿研究

以提高烧结矿性能为目标,对国内两种铁矿粉以及国外三种铁矿粉进行了同化性能、液相流动性能、粘结相强度三个方面分析研究,并据烧结矿各项性能指标制定出配矿方案进行优化实验,探寻最佳配矿比例。结果表明,五种铁矿粉中自产矿的各项性能最优,其他四种铁矿粉的各项烧结基础性能优势各不相同。其次,根据实验结果制定出优化配矿方案,对比混合矿的各项基础特性,得出最优化配矿方案：自产矿为50%,鞍千矿为20%,巴西B为15%,澳矿为10%,巴西A为5%,为现场烧结生产提供了理论依据。     

富矿粉烧结配矿优化研究

为了降低烧结成本,减少烧结过程能源的消耗,同时提高烧结矿质量,针对某钢铁公司富矿粉烧结进行优化配矿实验研究。选用南非富矿粉、巴西卡粉与南非精矿粉1、2进行了烧结配矿优化研究。结果表明:最优配矿方案为6~#,其中巴西卡粉、南非富矿粉、南非精矿粉1配比为15∶70∶15。其利用系数为2.66t/(m~2·h),转鼓指数为63.39%,RI、RDI_(+3.15)分别为70.06%和51.30%,熔滴性能总特性S值为1419kPa·℃。     

各种铁矿粉的同化性及其互补配矿方法

对来自巴西、澳大利亚、南非以及国产的19种铁矿粉的同化性进行了实验测定和考察分析,在此基础上研究了基于铁矿粉同化性的互补配矿方法,并设计了九组烧结优化配矿方案.结果表明:(1)不同类型铁矿粉的同化性存在显著差异,巴西赤铁矿和国产磁铁矿的同化性低,而澳大利亚含结晶水的赤铁矿的同化性高;(2)铁矿粉的烧损含量、气孔率和Al2O3含量等与其同化能力呈正相关关系;(3)SiO2和Al2O3以黏土形式存在的铁矿粉呈现出同化性较高的特征;(4)铁矿物晶粒小的铁矿石有相对高的同化性;(5)采用本研究的配矿方法,当劣质铁矿粉用量达50%水平时,仍可获得烧结技术指标和冶金性能优良的烧结矿,显示出基于同化性的互补配矿技术的有效性和优越性.     

低价含铁料烧结优化配矿的研究

根据烧结现场的生产要求,通过固定返矿量,选择三种矿粉作为基础矿,然后分别配加五种矿粉进行烧结优化配矿研究.研究结果表明:现场烧结配矿方案AA烧结矿的低温还原粉化指数(RDI+3.15)最高.与烧结现场配矿方案AA对比,配加7#矿粉的AC方案烧结矿的强度较高,配加9#矿粉的AE方案烧结矿的还原度(RI)较好,配加6#矿粉的AB方案烧结矿的荷重软化性能较好.综合对比五种烧结方案的烧结工艺参数以及烧结矿的粒度组成、机械强度和冶金性能,得出最优配矿方案为:1#(34％)+2#(20％)+3#(16％)+4#(17％)+9#(13％).     

烧结矿配料优化计算模型的设计

炼铁厂进行烧结矿配料时,当铁矿粉种类较少时,配料计算非常简单,当铁矿粉超过5种以上时,就难以通过普通多项式进行计算。建立一种多矿种铁矿粉最优化配矿组合数学模型并编写了相关程序,可输出满足烧结矿成份要求、相对该种配矿组合价格最低的铁矿粉配矿组合。     

钒钛粉烧结性能研究

随着钢铁冶金市场原料资源竞争激烈,国内和传统意义上的炼铁原料供应远远不能满足钢铁发展的需要。原料价格的飞涨,必须考虑降低生产成本的问题。烧结原料的物理、化学性质和烧结工艺参数直接影响烧结矿的产量与质量,黑龙江建龙的钒钛矿粉与普通的烧结矿粉比,最主要的优点是使用了含钒钛磁铁矿。钒钛磁铁矿的成球性能比较差,混合料的透气性不好,导致垂直燃烧速度慢,黏结相不充分,烧结矿的强度差和500℃时低温还原粉化严重,使烧结返矿率增加,产量和烧结利用系数大大降低。     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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