第二代液态电渣冶金技术的发展

描述了基于导电结晶器的第二代液态电渣冶金技术的原理、特点和应用情况,主要包括液态电渣浇注实心锭、空心锭和复合轧辊。同时,介绍了采用液态电渣浇注技术制备双金属耐腐蚀钢筋和铜钢复合电极的试验结果。最后,对今后的发展提出了展望,指出液态电渣浇注技术与连铸工艺的结合将是今后的发展趋势,并提出了液态电渣多次多层复合法制备特大型钢锭的可行性。     

模糊灰色理论在金属矿山地质灾害评估中的应用

针对金属矿山开采所带来的地质灾害问题,运用两种理论结合建立一种灾害等级综合评估模型,将金属矿山地质灾害的影响因子进行综合评估预测来确定金属矿山的灾害等级,将模型对实际金属矿山灾害进行评估预测,取得了与实际情况较为吻合的效果。     

Effect of FeO in the slag and silicon in the metal on the desulfurization of hot metal

Work has been conducted to investigate the effects of FeO in the slag and silicon in the metal on hot metal desulfurization. Laboratory experimental results show that FeO decreases and silicon increases the rate of desulfurization. Silicon in the metal is consumed by the reduction of FeO and also by the desulfurization reaction. A mathematical kinetic model was developed to describe both the effects of silicon and FeO on desulfurization for the laboratory scale. The model predicts the sulfur and silicon content in the metal and the FeO and sulfur content in the slag as a function of time. It is based on four-component simultaneous mass transfer: sulfur and silicon in the metal and FeO and sulfur in the slag. Experimental results, the development of the kinetic model, and a comparison of the model and experimental results are presented.     

如何提高露天金属矿山安全管理人员的综合能力

露天金属矿山开采是露天矿山安全管理工作中最为主要的一部分,露天金属矿山安全管理的有效实施将会对露天金属矿山开采作出最为稳妥的安全保障,露天金属矿山开采的管理问题一直是露天金属矿山安全管理部门最为注重的问题,一些露天金属矿山安全开采情况较为复杂的区域想要零风险的进行露天金属矿山开采显然是十分困难的,但是露天金属矿山安全管理工作正是积极面对这种困难的最为直接的手段。露天金属矿山安全管理工作在于加强其安全管理人员的综合能力。面对责任重大的露天金属矿山安全管理工作,不具备露天金属矿山安全管理的基本专业能力是不行的,这也是露天金属矿山安全管理在选择任职人员时关键的一点。     

我国贵金属废料回收产业发展综述

分析贵金属废料回收利用的良好经济效益,总结废旧贵金属的主要来源,以及废旧贵金属回收的新技术。指出我国废旧贵金属回收体系尚不健全,亟待政策支持。     

浅析交流电气设备金属外壳接地的必要性

现如今,不论是日常生活或工作都离不开电气设备,在电气设备使用的过程中,为了确保安全,需要做好金属外壳接地,确保金属外壳和电源之间的绝缘性。如果没有做好金属外壳接地,很有可能造成触电、漏电、燃烧、爆炸等危险,不仅影响电气设备的正常使用,还会威胁用户的生命财产。本文主要就交流电气设备金属外壳接地的必要性进行了相关的阐述和分析。     

湖南有色金属新材料产业发展研究

有色金属新材料在湖南新材料产业中占有重要地位，但有色金属新材料产业又是有色金属行业的薄弱环节之一。通过分析国外有色金属新材料产业的发展形势和湖南省有色金属材料产业存在的问题，提出了湖南省有色金属材料产业发展总体目标、战略发展思路、对策措施和政策建议。     

机械制图一体化在金属加工设备运行中的应用

传统金属加工设备存在持续运行连贯性较差的缺陷,以此开展了基于机械制图一体化技术的金属加工设备运行设计。引入积木式机体安装方法,设计金属加工设备运行机体,设计设备加工金属过程,控制金属加工设备电气运行方式,设计设备固焊流程。提出对比实验,验证提出设备可提升金属加工设备运行的连贯性,更具备市场经济效益。     

论金属矿产勘查中地质找矿技术创新

随着社会经济环境的不断变化,金属矿产资源成为促进社会发展的重要基础,我国对于金属矿产的需求不断增加。而现有的金属矿产勘查技术对现代金属矿产开采产生严重的制约,无法有效满足矿产开采的需求。为此,必须对地质找矿技术进行有效的创新,使以往的方法可以与现代方法进行紧密的融合,为金属矿产勘查工作提供技术方面的支持,使金属矿开采效率显著提升。     

Influence of the Physical Properties of Liquids and Diameter of Bubble on the Formation of Liquid Column at the Interface of Two Liquid Phases by the Rising Bubble

The formation of metal emulsion in a steel-making process enhances the reaction between metal and slag. A part of the metal emulsion is formed by a bubble passing through the interface between the metal and slag phases. In a previous study, it was determined that the formation of metal column by the bubble is related to the formation of metal droplets. In this research, the effects of bubble particle size, interfacial tension, viscosity of upper layer, and lower layer density on the formation of lower liquid column were investigated. In order to conduct an in situ observation of gas and liquid behaviors, aqueous solution and silicon oil systems were employed. It was determined that a narrow and elongated column forms liquid droplets in the upper liquid layer and contributes to the formation of droplets. The height of the column and the volume of droplets increase with the increase in bubble size. The influence of interfacial tension of the two liquid phases on the column height and the formation of droplet is slight. The height of the formed column decreases with the increase in the density of lower liquid.     

碳含量对金属钕的组织结构及性能的影响

通过对金属钕产品进行金相分析和硬度测试后发现，在氟盐体系电解法生产金属钕的过程中，碳含量是金属钕产品的一个重要质量指标，也是影响金属钕的组织结构和性能的主要因素。     

铝电解槽熔体中电流分布的数值计算

在电解槽三维电位场计算的基础上,对电解槽在不同工艺条件下及不同结构时的电流场进行了数值计算:1)伸腿长度为零的理想情况;2)伸腿伸至阳极底部;3)不同铝水平及换极;4)泄流式电解槽.通过分析发现,铝液中y 向电流密度沿阴极长度方向表现出先增后降的趋势,Jy的幅值随铝液层面降低有所增加.在伸腿伸至阳极底部时,在槽边部会出现较大的逆向电流,伸腿越长,逆向水平电流越大.铝液层面中垂直电流密度沿阴极碳块长度方向自里向外呈现增加趋势,且铝液层面越低,电流密度变化梯度越大.铝液中x向电流可以忽略,且随铝水平变化较小.泄流式电解槽熔体中存在较大的电流密度集中现象,炉底压降相对较大.     

硬质合金回收简便方法--机械破碎法的新进展

报道了硬质合金回收简便方法－－机械破碎法的新进展。采用该法，只须采用破碎和细磨，不经任何化学处理，就能高质量地回收利用废硬质合金。     

Influence of Metal Properties on the Formation and Evolution of Metal Coatings During Mechanical Coating

Powders of Cu, Ti, Ni, Fe, and Zn metals were used to prepare coatings on the surfaces of Al₂O₃ balls by the mechanical coating technique. The coated Al₂O₃ balls were characterized with XRD and SEM. The results showed that all the metal powders except Ni formed continuous metal coatings. The evolution of metal coatings during mechanical coating was also investigated. The analysis indicates that as long as continuous metal coatings can be formed, the evolution can fall into the following stages: nucleation, formation and coalescence of discrete islands, formation and thickening of continuous coatings, and exfoliation of continuous coatings. Electronegativity of the metal was shown to have a major effect on the adhesion of the tiny metal particles on the surfaces of the Al₂O₃ balls during the initial stage of mechanical coating. The lower the electronegativity of the metal, the greater the coverage of the metal on the Al₂O₃ ball and the easier the adhesion of the tiny metal particles. Further, the better the plastic deformability of metal, the easier the cold welding among metal powder particles and the greater the thickness of the continuous metal coatings.     

Influence of grain size on the hardness of alpha plutonium

The effect of grain size on the hardness of alpha plutonium was measured at temperatures between 77° and 373°K. The observations were: 1) fine-grained metal had the lowest hardness at 373°K, 2) fine-grained metal had the highest hardness at 77°K, and 3) fine-grained metal had the greatest temperature dependence of hardness. At room temperature, fine-grained α-plutonium (1 μm) had a hardness of 235 Dph, whereas coarse-grained metal (2000 μm) had a hardness of 310 Dph. At 373°K fine-grained metal had a hardness of 120 compared to 225 Dph for the coarse-grained metal. At 77°K the hardness values were 505 and 475 Dph, the fine-grained metal being harder at this temperature. The hardness was estimated to be independent of grain size at 140°K. Above 140°K, grain boundaries have a softening effect due to the contribution of grain boundary sliding to deformation.     

低碳经济模式下开展有色金属矿产资源综合利用的重要性探讨

文章对用低碳经济模式来指导有色金属矿产资源综合利用的重要性进行了全面阐述．对我国有色金属矿产资源的特点、现状进行了分析：即我国绝大部分矿床是多组分共伴生的综合矿产,且二次资源相当丰富,然而综合利用程度低;提出了低碳经济模式下开展矿产资源综合利用的具体措施,认为清洁生产是开展低碳经济模式下矿产资源综合利用的关键,而有色金属矿产资源综合利用、特别是“二次资源”的综合利用是实现有色金属工业低碳经济的关键．     

Effect of the metal charge mass and the slag thickness on the process of steelmaking in an arc furnace

The effect of the metal charge mass and the foamed slag thickness on the sulfur, phosphorus, nitrogen, and hydrogen contents in a metal produced in a 120-t arc steel-melting furnace is studied. It is shown that the sulfur and nitrogen contents in the steel increase and the phosphorus and hydrogen contents decrease as the metal charge mass increases or the slag thickness (mass) decreases.     

金属矿区土壤治理研究进展

针对金属矿山开采造成的土地破坏与污染,简述我国金属矿山土地生态治理现状,介绍国内外在金属矿山土地复垦、重金属污染的改良剂修复、植物修复等土壤修复技术进行的实践,探讨今后我国金属矿山土壤生态恢复的发展方向.     

高炉炉缸凝铁层物相分析

在高炉炉缸破损调研的基础上对高炉炉缸耐火材料热面凝铁层进行取样,利用扫描电子显微镜、物相分析等分析手段揭示了凝铁层的物相组成,并运用Thermol-calc热力学计算软件结合TCFE8数据库对铁水中石墨碳的析出温度及析出相分数进行了计算,最后揭示了炉缸凝铁层物相的形成机理.结果表明,高炉炉缸凝铁层主要由Fe相和石墨碳相交替分布组成,铁水成分对石墨碳析出温度影响较大,石墨碳析出温度远高于铁水凝固温度,铁水中C、Si元素含量对石墨碳析出相分数影响较大,而石墨碳析出相可增大铁水黏度11.9%.凝铁层中石墨碳的析出主要是由于Fe-耐火材料界面温度低于石墨碳析出温度,使得铁水中C不断向耐火材料热面迁移,进而形成Fe-C交替的分层结构.      

国内外铁水脱硫预处理技术发展概况

本文较详细地介绍了铁水脱硫预处理熔剂的研究与应用效果和主要铁水预处理工艺，并阐述了铁水脱硫预处理的目的、作用和经济性。