500t残极破碎机柱塞缸缸筒结构优化设计

500t残极破碎机作为破碎电解残极块以及其它不合格的生、熟阳极块的主要设备,能否正常运行将直接影响下一步的生产作业。柱塞缸是残极破碎机中的主要承载部件,柱塞缸的使用性能和寿命直接影响破碎机的使用性能。在设备使用过程中,柱塞缸漏油现象时有发生。经对柱塞缸缸筒结构进行优化设计,产品性能更加可靠、柱塞缸泄露率明显降低、设备维修维护成本降低,满足用户更高的需求。     

浅谈新建大型预焙槽首次阳极更换顺序

总结了新建大型预焙槽启动后首次阳极更换所采用的 3种换极顺序的优缺点 ,指出快速换极顺序单台槽产生的高残极只有 3块 ,单台槽产生的高残极总计可以用 15d ,阳极更换用的时间短 ,阳极更换操作容易 ,对阳极电流分布影响小     

对辊破碎机光辊不啮入料分析及处理的实践

针对铝电解生阳极生产中破碎残极的对辊破碎机存在不啮入料的情况,通过理论分析和实践,解决了对辊破碎机采用光辊面时无法破碎粒径为60～70mm残极料块的问题,有效地提高了生产效率。     

铜电解残极板破碎设备的研发与应用

目前铜冶炼行业对电解工段产生的副产品——铜电解残极板,需要经过破碎后才能利用先进的氧气底吹连续炼铜生产工艺进行二次回炉冶炼。针对这一现状并结合生产实际,设计制造出了用于对铜电解残极板进行破碎的专用冶金设备——残极破碎机组,其主要由自动分板上行位、残极破碎主机和电气控制部分组成。自动分板上行位可将铜电解残极板逐块分开并运输至破碎设备上方,落到破碎设备中由双轴刀齿盘将残极板破碎,碎料落入收集箱。使用企业反馈,本机组设备能够完成铜残极板的自动给料、逐块分板、破碎和收集工作,破碎效率高,完全满足产能要求。     

多功能铝电解槽阳极坑捞块装置的设计及应用

中间下料预焙铝电解槽更换阳极作业时必须将残极料块和料渣捞出.针对过去人工捞渣存在的问题,提出了一种新型的多功能铝电解槽阳极坑捞块装置.该装置可以一次性捞出阳极坑内的残渣,使用效果良好.     

浅谈阳极组装车间工艺流程

在悬链输送系统和地面各工作站的共同作用下,阳极组装车间处理电解车间换下的残阳极组(残极),并为电解车间生产新阳极组(新极)。同时,对残极上的电解质进行破碎、贮存,并返回电解车间作为阳极覆盖料使用;压脱下来的残极炭块经带式输送机送往残极处理车间;阳极组装车间还设有新极、残极存放区。     

降低贵冶电解残极率

残极率是衡量电解技术重要技经指标之一。降低残极率可以直接减少残极回炉量,降低熔炼重复冶炼成本及铜金属损失。贵冶从生产实际出发,提出了降低电解残极率的措施,并且在2013年贵冶残极率达到了世界领先水平的基础上,取得了较大的进步。     

浅谈影响铜电解残极率的主要因素

残极率是ISA法铜电解精炼的重要技术指标之一,残极率的高低,可体现出生产工艺的先进性、及生产管理水平,同时影响整个公司的吨铜加工成本。本文主要介绍了ISA法铜电解精炼影响残极率的主要因素,并分析这些因素对残极率的影响,同时提出改进措施,降低残极率。     

浅析加高阳极在铝电解槽上的应用对节能降耗的贡献

中铝某分公司针对的阳极交换周期低,经广大科技人员努力,将阳极碳块的高度由原来的550mm提高到570mm,该阳极碳块应用于电解槽上,使中铝某分公司的换极周期由28．5d调整为29．5d,阳极炭耗降至510kg／t·Al（含电解反应后残极剩余量）。同时,该阳极用于铝电解生产后,电解槽生产更加平稳运行,并减少了工人的劳动强度,提高了企业经济效益。     

铜电解降低残极率的生产实践及经济效益

本文从云铜现有的生产实际出发,提出了降低铜电解残极率的措施,对降低残极率所获得的综合效益进行了测算。对于年产304 kt阴极铜的电解生产,将传统电解和艾萨电解生产的残极率从20.48%和19.01%分别降低至17.5%和17.0%,将减少残极产量11 652t,同时减少因残极进行重熔浇铸造成有价金属(铜、金及银等)损失以及残极在回炉重熔、电解精炼、运输及财务等所发生的各项费用上千万元,获得良好的经济效益。     

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In order to improve the management level of plate enterprises, ERP, MES and process control system (PCS) were used coordinately for the information management. Stable information exchange was the most important condition for the best using of information management. According to the plate production process, the specific content and trigger time for the data exchange between PCS and MES were designed. Intermediary database was used for date exchange implement. The information data exchange technology developed for the PCS and MES was applied successfully for several domestic plate plant lines. The logistics and information flow for the plate line have been running smoothly. It also can provide a reference for the information construction of similar production lines.     

统计工作在产品等级判定中的作用

论述了本钢冷轧薄板厂在2006年运用统计方法,对质检判定水平作以分析,使之更标准和准确,对减少异议率,提升冷轧产品整体形象以及提高产品实物质量起到了至关重要的作用,通过此项分析的实施和运用,使全体质量检查员能够统一判定认识,真正建立起冷轧质检判定的一套标准程序,有利于产品质量判定总体水平的提高。     

Active Earth Pressure on Retaining Wall for c-? Soil Backfill under Seismic Loading Condition

This technical note describes the derivation of an analytical expression for the total active force on the retaining wall for c-? soil backfill considering both the horizontal and vertical seismic coefficients. The results based on this expression are compared with those obtained from earlier analytical expressions for the active force for c-? soil backfill under seismic conditions, and found to have a similar trend of variation. The parametric study shows that the inclination of the critical failure plane with the horizontal plane decreases with the increase in values of seismic coefficients; the decrease being more for their higher values. The total active force increases with the increase in value of horizontal seismic coefficient; while it decreases with the increase in value of vertical seismic coefficient except for a very high value of horizontal seismic coefficient. Design charts are presented for various combinations of horizontal and vertical seismic coefficients (kh and kv), and values of cohesion and angle of shearing resistance for estimating the total active force on the retaining wall for c-? soil backfill for practical applications.     

Experience of Improving Standards and Methods for Studying the Properties of Metal Powders and Sintered Articles

Reasons are considered for improving standards in the following methods for testing powder materials: tensile, transverse bending, gas and liquid permeability, and determination of powder compact dimensions after compaction pressure removal and during sintering. Calculated data for representative specimen dimensions (cross section and thickness) for these and other test methods for sintered articles (materials) prepared from mono- and polyfraction iron powder of different sizes are confirmed by experiment. It is shown that the representative specimen dimensions prepared from monofraction powder are more than an order of magnitude less than for those prepared from polyfraction powder. The reason for this difference is considered to be the special role of individual particles (for monofraction powder) or assemblies of these particles (for polyfraction powder) in forming elementary fragments within the structure of compacts and sintered articles. Data are provided for the improved ISO 4492-1985 standard and a new GOST 29012-91 standard developed on the basis of it for precise determination of changes in the dimensions of powder compacts during pressing and sintering. Use of this method makes it possible to reveal the existence of different structural states within narrow porosity limits for powder materials. It is shown by experiment that the pulsed ultrasonic method for monitoring these structural states based on measuring the propagation rate and (or) the elastic wave damping factor, exhibits high sensitivity, it is rapid, and it may be recommended for extensive introduction and standardization in powder metallurgy.     

有色上市企业内控制度审计研究

本文结合白银有色集团股份有限公司首发上市要求,通过对公司内部控制的内涵和内部控制审计内容的阐述,论证了完善企业内部控制和开展企业内部控制审计的重要性,指出了目前企业内控制度审计中存在的问题和差距,提出了加强有色上市企业内控制度审计的基本思路和措施,旨在有效提升内审监督的增值服务价值。     

斜齿轮三维参数化建模的研究

文章阐述了利用VB6.0进行SolidWorks二次开发的关键技术,论述斜齿轮的三维参数化建模系统开发的具体过程,对比了不同建模方法的特点,提出齿轮三维建模误差分析的两种方法,为模型应用提供了理论指导,同时对该研究方法的拓展性应用举出实例,给出用VB开发SolidWorks一般方法。     

Sediment Flocs: Settling Velocity, Flocculation Factor, and Optical Backscatter

Improved relationships for the flocculation factor and floc settling velocity are proposed. They differ from the existing formulas by accounting for the effect of floc porosity on the hydrodynamic drag and for the fractal properties of the floc projection on the plane. These relationships predict that the fractal dimension d influences the floc settling velocity Ws only if d ≥ 2. A flocculation effect on optical backscatter is also considered, and a fractal-based relationship for quantifying this effect is proposed. This relationship serves as a basis for a simple optical backscatter sensor (OBS) based technique for estimating some fractal-related parameters of sediment flocs involved in the proposed relationships for the settling velocity and flocculation factor. The technique is tested using data from three field sites. The potential effect of particle size on backscatter efficiency is highlighted, and an approach for accounting for this effect is suggested.     

260t转炉炉壳锥段旋转更换方法

介绍了鞍钢260 t转炉炉壳更换方法的工艺思路、施工流程及操作要点。该方法摒弃了以往更换转炉锥段的繁琐性以及工期长、投资大等缺点,利用设备自身本体功能进行安装,节省了工期、简化了程序、降低了费用,该方法适用于转炉大中年修及检修抢修项目的施工。     

Predicting Soil and Structure Vibrations from Impact Machines

A method for predicting the complete time-domain vibration records of soil and structures prior to installation of foundations for impact machines is described in detail. A paper provides support for the validity of accepted assumptions about the use of impacts directly on the soil for estimating the impulse response functions, and the effect of load zone dimensions on soil vibrations. The procedures for experimental testing on a site and computing the predicted complete vibration records are developed. Resulting patterns of computed and measured vibrations are shown for block-type foundation and a foundation under a vibroisolated block for impact machine. Furthermore, the method enables us to consider the heterogeneity and variety of soil and structure properties. In particular, it is useful under nonuniform and complicated soil conditions for determination and verification of safe distances from machine foundations to objects sensitive to vibrations.     

Formalism for Construction Inspection Planning: Requirements and Process Concept

Inspectors currently do not have adequate planning support to prevent inefficient or overlooked inspections and undetected defects. Underlying this problem is the lack of a planning formalism for specifying inspection goals and for developing and selecting inspection plans. This paper discusses the requirements for such a formalism. We describe sources of inspection knowledge and approaches for planning in general and for inspection planning specifically. We then describe a set of requirements for the representation and reasoning needed to support the use of available inspection knowledge to assist inspectors in the processes of creating sets of inspection plan alternatives and reducing that set to a smaller set of inspection plans for a given project.