炉渣加工综合利用

苏联伊里奇钢铁公司建成了一个炉渣加工车间,对高炉渣、平炉和转炉渣、均热炉渣以及部分渣堆上的渣进行加工。加工能力为450万t/a。1984年加工出水渣和碎渣440万 t,生产出碎铁10万 t,氧化铁皮19.6万 t。     

低碳低磷钢炉渣改质试验研究

文中通过实验室试验和生产现场试验,验证了低碳低磷钢炉渣改质的方法。使用炉渣调整剂对炉渣改质时,应选用含碳量高的炉渣调整剂。实验室试验使用碎焦粒对炉渣改质,取加入焦粒4 min时的渣样分析可知,在溅渣时间内可降低炉渣(FeO)5%左右。现场加碎焦粒对炉渣改质试验,成本降低50%,同时降低渣中(FeO)比使用炉渣调整剂高1%,证明该方法有效可行。在实际使用过程中应根据渣量、终渣情况、焦粒成分等适当调整。     

某铝箔车间碎边吸边输送系统设计

铝箔轧机、合卷机、分卷机和剪切机一般均需要切边,切下来的废料通过碎边吸边风机切碎、再通过管道输送到打包间。碎边吸边输送系统是现代化加工厂生产中不可缺少的一道工序,本文详细介绍了铝箔碎边吸边输送系统风量计算,碎边吸边风机型号选择和布置,碎边吸边系统的管道设计,注意事项以及系统的控制、联锁等内容。     

针对某铜冶炼渣选矿工艺流程的探讨研究

以某铜冶炼渣选矿厂工艺现状为出发点,探讨对比铜冶炼渣碎矿、磨矿、浮选、脱水的不同工艺流程。对比表明,该铜冶炼渣选矿最佳选矿流程为“粗碎+半自磨+阶段磨矿阶段选别+中矿单独再处理”的工艺流程。     

转炉均质挡渣球的研制与应用

分析了安钢20t转炉挡渣锥存在的问题，研制开发出一种新型转炉出钢挡渣器——均质挡渣球。均质挡渣球球内各部分质量均等，球面有三条圆环槽，密度4．3g／cm^3，材质选用碎铁和铝矾土熟料，结合剂选用高铝水泥。该均质挡渣球已应用于实际生产中，效果良好。     

半自磨机在冶炼炉渣选矿中的应用

冶炼炉渣处理一直是一个技术难题,弃渣不仅会污染环境,而且会造成资源浪费,江西铜业集团公司贵溪冶炼厂新渣选采用半自磨——球磨的碎磨流程,取得了良好的经济效益。介绍了半自磨——球磨的碎磨流程与贵冶老渣选相比的优点。     

松软锰矿资源利用实践

本文介绍我矿利用松软锰矿生产机烧结矿,再利用副产品(机烧结粉矿)冶炼富锰渣,然后用机烧结矿、富锰渣与冶金锰块矿配合冶炼锰硅合金的工艺试验及生产情况.实践表明,此法可行,扩大了锰矿资源的利用。     

保护渣在连铸生产中的作用与实残

结合炼钢厂1^#～4^#机保护渣的使用情况，介绍保护渣性能对连铸生产的影响，现场评价保护渣的基本方法，以及选择保护渣应考虑的连铸工艺情况。     

铁水扒渣设备综述

铁水扒渣设备广泛应用于炼钢生产,各类扒渣设备产生与发展、设计与结构、应用效果等各不相同;小车走行式液压扒渣机性能优越,吹气辅助扒渣、扒渣板的具体优化设计、扒渣动作的优化设计能有效提高设备的扒渣性能。     

1400轧机双滚筒式斜刃碎边剪性能分析

本文在分析引进轧机配备的双滚筒碎边机的基础上,推导了碎边剪剪刃曲线的方程和各主要参数间的关系,总结了碎边机的主要特点,对碎边机的设计及使用有一定参考价值。     

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。     

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。     

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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.     

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。     

Assessing the Financial Feasibility of Utility-Provided Backup Power during Project Site Planning

The events leading to the sudden and catastrophic failure of the North American power grid during August 2003 coupled with a record hurricane season a year later have civil engineers rethinking cost-effective backup power solutions for their clients. Electric deregulation across many areas of the United States has utilities looking for new value-added products and services to protect and acquire market shares. As a result, a new partnership has emerged between site planners and utilities to provide affordable backup power to the customer. Case studies are provided for a 1.0?MW backup power project for a 367-bed hospital and a 1.25?MW parallel power project for an insurance call center located in Gainesville, Fla. Results for each show competitive pricing for the client and attractive returns for the utility.     

EAF电极消耗对标指标分析

通过对电极消耗的原因及计算公式进行分析,发现将电极侧面、前端消耗速度指标作为描述电极消耗的对标指标,可使得不同装备下的电极消耗水平具有更好的可比性,可以使电极消耗工艺差距分析更为直接。     

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。     

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.