处理废线路板的闪速熔炼及电炉贫化工艺

该发明涉及一种处理废线路板的闪速熔炼及电炉贫化工艺。该发明所要解决的技术问题是提供一种不需要分选，不需要添加其他燃料的闪速熔炼及电炉贫化工艺。     

金川富矿降镁抑制剂的研究与应用

为了给闪速熔炼提供低镁优质镍精矿，针对降低金川二矿区富矿石选矿精矿中ＭｇｍＯ含量。在精选作业添加ＪＣＤ新药剂，精矿中镍品位达到６．５６％，ＭｇＯ含量降到６％以下，达到了闪速熔炼的要求。     

基于数值模拟的闪速连续炼铜炉型结构研究

分析4种闪速连续炼铜炉型的本质特性,提出将闪速连续炼铜过程视为由相对独立的闪速造锍熔炼过程和连续吹炼造铜过程构成,分别建立闪速造锍熔炼多相平衡数学模型和连续吹炼造铜局域平衡数学模型,并通过中间物料的传递将两模型有机结合,从而构建完整的闪速连续炼铜过程热力学模型。运用此模型,考察炉型结构对闪速连续炼铜过程的粗铜生成条件、Fe3O4行为、铜在渣中损失以及铜直收率等因素的影响。结果表明：相对于其他3种炉型,甩渣吹炼双烟道D型炉是比较理想的连续炼铜炉体;对于闪速连续炼铜,造锍熔炼段和铜锍吹炼段宜在相对独立的分区进行,各自炉渣和烟气也应分开排出炉体。     

第12届国际闪速熔炼大会在上海召开

10月26日至31日,“第12届国际闪速熔炼大会（12th IFSC）”在上海召开,这是该会举办以来首次在中国召开。 中国有色金属工业协会顾问、前副会长王恭敏先生应奥图泰邀请参加了本届大会并作了重要讲话。他说,“本届大会将为中外专家就闪速熔炼技术的发展现状和发展前景搭建一个广泛的交流平台,既有专业报告,又安排了到中国企业的现场参观,内容丰富;本届大会在中国召开,是中国有色金属工业的一件幸事,我们将以此次会议为契机,继续加强国际交流与合作,使闪速熔炼技术在中国进一步发扬光大。”     

从矿石中获取更多——访奥图泰公司执行总裁Markku Jortikka先生

金秋十月，我们应邀参加了在上海召开的“第十二届国际闪速熔炼技术全球用户大会”。在会议的间隙，有幸采访了奥图泰公司的执行总裁Markku Jortikka先生。     

奥图泰创造的时代

业界流传这样的说法：芬兰奥图泰公司（以下简称＂奥图泰＂）的工艺设计像是一个谜,完美到每个部件都可以无缝对接。例如,作为世界闪速熔炼技术的拥有者,奥图泰用于铜转换的闪速熔炼过程全部处于密封状态,能轻而易举地收集工业废气和捕捉其中的排放物,同时原料中所含的能量可以得到充分利用和回收,最大限度减少对环境的影响。     

铜闪速熔炼多相流模型化研究进展

铜闪速熔炼具有高处理量、高富氧浓度、高冶炼效率和低环境污染的优势,已在世界范围内广泛推广应用,深入研究闪速熔炼过程中的物理化学现象和原理具有重要意义。然而,闪速炉内多相流间相互作用及熔炼动力学行为受到多方面因素的共同影响,仅依靠生产经验、试验观测和理论分析难以全面解析炉内多相流传质传热过程、获取流体流动特性、揭示气固多相流相互作用规律,阻碍了闪速炉冶炼效能的进一步提升。当下计算流体力学数值模拟发展迅速,正为预测和分析闪速炉内多相流问题提供了高效、准确、直观的帮助。本文在介绍铜闪速炉结构、冶炼原理、理论模型的基础上,阐述了近年来铜闪速熔炼动力学反应机理、炉内流动特性方面模型化的研究成果及发展趋势,全面综述了铜闪速炉在喷嘴、沉淀池、上升烟道、锅炉优化方面的研究成果,为闪速炉生产优化及设计改进提供指导。     

高铬铸铁的感应炉熔炼技术

介绍了感应炉熔炼高铬铸铁过程中的五个技术要领。用热力学的方法计算了熔化时坩埚反应的平衡温度与测试结果基本相符。为高铬铸铁的熔炼制度提供了理论根据     

喷枪顶吹熔炼技术的应用

喷枪顶吹熔炼技术的进展传统熔炼有鼓风炉熔炼、反射炉熔炼、电炉熔炼等。传统熔炼流程技术成熟、可靠,简易灵活,设备结构简单。但传统熔炼流程的生产效率低;脱硫率低,硫的回收率低,烟气含SO2浓度很低,低浓度二氧化硫烟气处理费用高,环境污染严重,劳动强度大,生产条件差;燃料率高,对燃料要求苛刻,如鼓风炉熔炼要求用价格较贵的焦炭,电炉熔炼要求有充足的电力。由于传统熔炼流程存在上述问题,因此世界各国都在淘汰传统的鼓风炉熔炼、反射炉熔炼和电炉熔炼等流程,而采用先进的闪速熔炼、熔池熔炼取而代之。喷枪顶吹熔炼技术是上世纪90年代由…     

江铜贵溪冶炼厂转炉炼铜

江西铜业公司贵溪冶炼厂是我国第一座采用闪速熔炼技术的现代化炼铜厂。投产12年来,该厂是坚持在消化吸收引进技术的基础上,创新发展,先后三次对转炉进行扩容技术改造,装炉的生产     

INFLUENCE OF ALLOYING ELEMENTS ON HYDROGEN DIFFUSION USING SCM-DV-Xα

The influence of alloy composition (Ti, Mn, TiN) on hydrogen diffusion in Fe was studied in detail using SCM-DV-Xα method. The voltage barriers were obtained via calculation on Fe clusters containing the alloy elements such as Ti, Mn as well as the chemical compound TiN respectively. The results showed that Ti element produced deep trap in Fe, decreasing the diffusion coefficient of hydrogen elements, Mn element did not produce deep trap in Fe, decreasing the diffusion coefficient slightly and TiN in Fe produced very deep "trap" decreasing the diffusion coefficient obviously. The calculation results were in agreement with experiment results.     

INFLUENCE OF ALLOYING ELEMENTS ON HYDROGEN DIFFUSION USING SCM-DV-Xα

The influence of alloy composition (Ti,Mn,TiN) on hydrogen diffusion in Fe was studied in detail using SCM-DV-Xα method.The voltage barriers were obtained via calculation on Fe clusters containing the alloy elements such as Ti,Mn as well as the chemical compound TiN respectively.The results showed that Ti element produced deep trap in Fe,decreasing the diffusion coefficient of hydrogen elements，Mn element did not produce deep trap in Fe,decreasing the diffusion coefficient slightly and TiN in Fe produced very deep “trap” decreasing the diffusion coefficient obviously.The calculation results were in agreement with experiment results.     

Bi2S3-ZnO-Na2CO3体系热力学分析及应用

对Bi2S3-ZnO-Na2CO3低温熔盐体系进行热力学分析,计算了在700～1 500 K温度下体系中各反应的标准吉布斯自由能变化值(ΔG TΘ),并绘制了相应的ΔG TΘ—T图。热力学分析结果表明,在700～1 100 K温度范围内,Bi2S3中的Bi会被C还原成金属Bi进入金属相中,S将以ZnS形式进入固体物渣中。根据分析结果,在700～1 100 K温度下,以Na2CO3等钠盐为熔剂、ZnO为固硫剂、粉煤为还原剂,开展了验证试验。试验得到了直收率达98%的粗铋,S几乎100%以ZnS的形式固定在渣中,与热力学分析结果一致。     

超声对7050铝合金凝固组织影响的数值模拟

采用Procast-CAFE模块,建立了7050铝合金形核和晶粒生长的数学模型,模拟了7050铝合金在不同功率超声作用下组织的演化过程。结果表明,随着超声功率增大,熔体形核率增大,晶粒细化效果更好,组织分布更均匀,平均晶粒尺寸更小。模拟结果与试验结果符合。     

Three-dimensional phase-field modeling of martensitic microstructure evolution in steels

In the present work a 3-D elastoplastic phase-field (PF) model is developed, based on the PF microelasticity theory proposed by A.G. Khachaturyan and by including plastic deformation as well as anisotropic elastic properties, for modeling the martensitic transformation (MT) by using the finite-element method. PF simulations in 3D are performed by considering different cases of MT occurring in an elastic material, with and without dilatation, and in an elastic perfectly plastic material with dilatation having isotropic as well as anisotropic elastic properties. As input data for the simulations the thermodynamic parameters corresponding to an Fe-0.3%C alloy as well as the physical parameters corresponding to steels acquired from experimental results are considered. The simulation results clearly show autocatalysis and morphological mirror image formation, which are some of the typical characteristics of a martensitic microstructure. The results indicate that elastic strain energy, anisotropic elastic properties, plasticity and the external clamping conditions affect MT as well as the microstructure.     

Influence of tool edge preparation on performance of ceramic tool inserts when hard turning

Coating, as a form of tool edge preparation, changes the properties, geometry and roughness of the active parts of tool inserts. The performance of both uncoated and coated ceramics was tested in machining tests and the results were related to the tool edge and the machined surface as well as cost indices. The presented results show that tool edge preparation by coating does affect forces, tool wear and the machined surface, while friction force from scratch tests and the coating thickness and its hardness have been identified as being relevant to the results of machining tests. The relationship between the thickness of the surface layer and residual stress at the surface due to coating has been evaluated. Though the tool life of coated ceramics is shorter than that of cubic boron nitride, tool edge preparation by coating contributes to the reduction in machining costs due to the application of higher cutting speeds.     

Moldflow模拟结果的精度分析

Moldflow是著名的注塑模CAE软件，其模拟结果的准确性对模具的设计、制造以及注塑成型生产的经济效率都具有十分重要的意义。以汽车凤扇为研究对象，按照实际的注塑工艺条件，应用Moldflow软件对汽车风扇注塑成型过程进行数值化模拟，并将模拟结果与ATOS测量结果进行此较，分析Moldflow数值化模拟结果的精度，为Moldflow在注塑生产过程中提供重要的依据。     

橡胶注射机合模机构力学性能数值模拟与实验研究

作为橡胶制品生产的重要设备注射机,其主要承载部件合模机构承受了较高频率的交变循环载荷,受力状态复杂,导致合模机构的零部件容易损坏失效.采用有限元模拟技术对注射机合模机构进行力学性能分析,获得机构中关键零件的应力分布,表明:导柱颈部的应力集中是其损坏失效的主要成因.改进导柱结构并进行有限元分析,导柱颈部应力幅值明显降低.搭建实验平台,实验结果与数值模拟结果吻合得很好.     

Stress-assisted martensitic transformations in steels: A 3-D phase-field study

A 3-D elastoplastic phase-field model is developed for modeling, using the finite-element method, the stress-assisted martensitic transformation by considering plastic deformation as well as the anisotropic elastic properties of steels. Phase-field simulations in 3-D are performed by considering different loading conditions on a single crystal of austenite in order to observe the microstructure evolution. The thermodynamic parameters corresponding to an Fe–0.3% C steel as well as the physical parameters corresponding to commercial steels, acquired from experimental results, are used as input data for the simulations. The simulation results clearly show the well-known Magee effect and the Greenwood–Johnson effect. The results also show that even though the applied stresses are below the yield limit of the material, plastic deformation initiates due to the martensitic transformation, i.e. the well-known transformation-induced plasticity (TRIP) phenomenon. It is concluded that the loading conditions, TRIP as well as autocatalysis play a major role in the stress-assisted martensitic microstructure evolution.     

Calculating the parameters of the temperature field in electroslag welding with an artificial heat sink

Summary

The aerospace and automobile industries favour this type of treatment. There are interesting results in regard to friction, wear and corrosion resistance. The results presented in this article report on experiments using exciplex lasers (sic) for the sole purpose of improving the wear characteristics of certain metals used in the automobile, aeronautical and aerospace industries. The main results concern changes in mechanical (roughness, hardness, stress fields, etc.), physical and chemical properties (surface composition, microstructure, etc.), as well as corrosion resistance.