彩管用框架薄钢板

分析了柱友及新日铁生产彩管框架薄钢板的工艺要点，以实例说明了实验过程，以图、表同了实验结果。由得到的磁性及加工工艺性能表明，净化钢质、强化热轧及热处理工艺条件，是生产优质彩管用材的关键。     

基于BT-SVM的氩氧精炼铬铁合金过程发生喷溅的预测方法

针对铬铁合金氩氧精炼过程中时常发生的喷溅现象,提出一种基于BT-SVM的喷溅预测方法.结合生产工艺,依据喷溅发生的原因及主要特征,选择了渣液上层表面温度与铁水温度等8个参数作为支持向量机的输入特征,选择爆发性喷溅、泡沫性喷溅、金属喷溅、正常工作作为输出特征,构建了基于BT-SVM的喷溅预测结构,将分类器分布在各个节点上...     

Object-based attention and occlusion: Evidence from normal participants and a computational model.

One way of perceptually organizing a complex visual scene is to attend selectively to information in a particular physical location. Another way of reducing the complexity in the input is to attend selectively to an individual object in the scene and to process its elements preferentially. This latter, object-based attention process was examined, and the predicted superiority for reporting features from 1 relative to 2 objects was replicated in a series of experiments. This object-based process was robust even under conditions of occlusion, although there were some boundary conditions on its operation. Finally, an account of the data is provided via simulations of the findings in a computational model. The claim is that object-based attention arises from a mechanism that groups together those features based on internal representations developed over perceptual experience and then preferentially gates these features for later, selective processing. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Prediction of Continuous Cooling Transformation Diagrams for Dual-Phase Steels from the Intercritical Region

The purpose of the present work is the implementation and validation of a model able to predict the microstructure changes and the mechanical properties in the modern high-strength dual-phase steels after the continuous annealing process line (CAPL) and galvanizing (Galv) process. Experimental continuous cooling transformation (CCT) diagrams for 13 differently alloying dual-phase steels were measured by dilatometry from the intercritical range and were used to tune the parameters of the microstructural prediction module of the model. Mechanical properties and microstructural features were measured for more than 400 dual-phase steels simulating the CAPL and Galv industrial process, and the results were used to construct the mechanical model that predicts mechanical properties from microstructural features, chemistry, and process parameters. The model was validated and proved its efficiency in reproducing the transformation kinetic and mechanical properties of dual-phase steels produced by typical industrial process. Although it is limited to the dual-phase grades and chemical compositions explored, this model will constitute a useful tool for the steel industry.     

Predicting the efficiency of chemical processes in the treatment of ores and low-grade concentrates

The large body of knowledge about the relation between chemical process efficiency and mineralogical features is of only limited use. The profession ought to try to improve the methods of using information as well as adding to the knowledge. One attempt is described.Correlations between process efficiency factors and the mineralogical features of low-grade concentrates have been developed from both a theoretical analysis and experimental measurements. The ultimate recovery of a reactive phase in an inert matrix can be calculated from simple measurements of the particle size, porosity and pore size of the concentrate, and the grain size of the reactive mineral. The rate of recovery, up to 98% recovery, can be calculated from simple measurements of particle size, porosity, proportion of reactive mineral and tortuosity. Some details are given.The correlations are of potential use in process selection and preliminary design. Satisfactory predictions have been made for near-ideal systems. Improvements in the measurement of pore size and tests on more realistic materials are required. The ultimate benefit of the correlations will be determined by the magnitude and frequency of the effects of mineralogical features other than those specified above.     

钢铁企业功能拓展是实现循环经济的有效途径

探讨了循环经济的概念和属性,指出：循环经济是以“3R”为原则、以资源“闭环”利用为特征和“经济”合理为边界条件的经济。钢铁工业是我国新型工业化进程中的支柱产业,同时也应是推进循环经济的优先切入点和重要环节。根据钢铁制造流程的特点、流程演进过程和发展趋势分析表明,钢铁工业实施循环经济存在着巨大潜力,发挥钢厂的三大功能钢铁产品制造、能源转换和社会大宗废弃物处理消纳功能是钢铁企业融入循环经济社会的有效途径。最后讨论了循环经济社会中的钢厂模式。     

中厚板无约束淬火机PLC过程控制故障分析

对中厚板无约束淬火机的计算机过程控制系统的构成及实施方法进行介绍,并对PLC过程控制系统的故障特点进行分析,给出较为实用的处理方法。     

Autocatalytic oxidation of hemoglobin by nitrite: a possible mechanism

Oxidation of oxyhemoglobin by nitrite ions to produce methemoglobin is one of the more employed procedures to oxidize the hemoprotein. The process takes place readily after a clear induction time. This behaviour is usually explained in terms of an autocatalytic reaction mechanism. However, the generally accepted mechanism is not autocatalytic and cannot explain the main features of the process. In the present work it is proposed that the characteristics of the process require the occurrence of a fast reaction between oxyhemoglobin and nitrogen dioxide. This process acts as a branching step, leading to the observed autocatalysis.     

艾萨熔炼法的发展及评述

艾萨熔炼法是芒特艾萨矿业有限公司 (MIM)和澳大利亚联邦科学工业研究机构 (CSIRO)联合开发的浸没式喷枪顶吹熔炼技术 ,是一种高强度有色金属冶炼方法。本文根据艾萨熔炼法的炼铜情况 ,论述了此方法的技术特点     

竖炉球团带式冷却机工艺设计

针对云南某球团厂竖炉生产工艺要求,重点介绍和分析了轻型带式冷却机的结构及工艺特点。项目正式投产后,冷却后的球团矿质量良好,满足工艺要求。     

PROPERTIES AND FEATURES OF DIRECT REDUCED IRON

The blast furnace process is still the predominant method for primary iron production. However, the disadvantages inherent to the process led to the development of alternative processes such as the mini blast furnace process, smelting reduction process, and direct reduction process. Many of these alternative processes are still under development. However, direct reduction processes have reached some level of commercial applicability and are considered to be the most developed alternative ironmaking route. It is coke-less and environmentally friendlier when compared to the blast furnace process. In addition, direct reduced iron has a well-defined chemical composition when compared with steel scrap and has efficient melting properties in the electric arc furnace. Consequently, there is a great increase in the demand for direct reduced iron in electric arc steel making. These attractive features have led to an increase in worldwide production of direct reduced iron, which is currently approaching 50 million tons. Thus, direct reduced iron is gaining more importance. Hence, this article summarizes the basic properties and features of direct reduced iron.     

棒材轧制工艺特点与老式轧机的利用

从棒材生产工艺特点出发，分析影响棒材产品精度的主要因素，认为棒材生产多种形式并存是产品本身特点所决定。为旧有的棒材车间工艺及设备改造提供参考     

Effect of the Composition and Quality Characteristics of the Metallic Charge on the Operational Indices of Converter Steelmaking

This article examines features of a new process for forming the metallic cold charge in the working volume of a 360-ton oxygen converter. The new process, using new composite materials of the Sintikom® type, is contrasted with the standard process employing charge materials of the traditional composition. The article examines the effect of the composition of different combinations of charge materials and the methods used to charge them on the operational indices of converter steelmaking.     

Review of mathematical models of fluid flow,heat transfer,and mass transfer in electroslag remelting process

Abstract

The electroslag remelting (ESR) process has been used effectively to produce large ingots of high quality based on the controlled solidification and chemical refining that can be achieved. Despite the widespread application of industrial facilities, there are still issues that prevent an effective control of the process. This is particularly critical considering the large ingots produced industrially which makes the traditional trial and error approach prohibitively expensive. Thus, mathematical models of the process are a good alternative as a process control tool. To predict the relationship between operating parameters such as power input and type, fill ratio, depth of electrode immersion, and slag chemistry and the casting rate, microstructural features, and ingot chemical composition, it is then necessary to develop mathematical models based on differential equations describing the fluid flow, heat transfer, and mass transfer phenomena that take place during the process. In the present paper, mathematical models of the transport phenomena occurring during ESR are reviewed. Although the models have evolved to a point where several features of the process can be predicted and the dominant transport mechanisms have been elucidated, more effort is required before the models can be applied to define actual operating conditions.     

FC200现场总线模块在转炉炼钢厂的应用

介绍现场总线模块原理及FC200现场总线模块产品的特点,结合转炉工艺特点配置系统硬件及设置参数;根据转炉工艺要求介绍编程要点。FC200现场总线模块是成熟的产品,经现场应用结果表明它能出色应用在冶金等行业,相比传统集中式系统节约大量有色金属,减少自动化系统的整体投资,提高可靠性,方便维护。     

铸造铅钙合金锭的开发

介绍了铅钙合金的特性、生产工艺和需要解决的几个问题；确定了用掺熔配法生产铅钙中间合金，该法操作简单、能耗和污染少、成本低，易投入工业化生产。实践证明铅钙合金是生产免维护密封蓄电池板栅材料的较佳合金。     

铅精矿干燥及除尘工艺设计与应用

介绍了基夫赛特炉对物料的要求、蒸汽干燥机的特点及烟气治理生产工艺的优化设计。生产实践证明流程选择合理，满足生产要求，可作为基夫赛特炉熔炼工艺物料干燥所选择的流程。     

对螺旋缝高频焊钢管机组技术改造的实践

对我公司原螺旋缝高频焊钢管的工艺流程和螺旋缝埋弧焊钢管的生产工艺流程进行了比较、分析和研究，提出了对螺旋缝高频焊钢管机组进行技改的总体方案，实施了技术改造，使该机组实现了螺旋缝高频和埋弧焊钢管双功能生产的要求。     

Feature and rule selection in categorization tasks.

The process by which stimuli are assigned to categories has been traditionally conceptualized as bottom-up. Accordingly, stimulus features are supposed to be the fundamental units of analysis, and categorization to be accomplished on the basis of feature category correlations (cue validities). Alternatively, top-down processes are invoked, in which case one begins with a given categorization rule and then assigns stimuli to categories on that basis. Bottom-up and top-down views share a fundamental weakness, namely, they are unable to specify how features or rules, respectively, are acquired. This difficulty can be overcome if it is assumed that the process starts with neither features nor rules, but with stimuli. Then, as a result of experience with stimuli belonging to different categories, the cognitive system discovers and uses locally constructed features that maximally discriminate between the categories at hand. According to this view, the relationship between a target and a contrast category is the main factor affecting what subjects learn about each. Two experiments were conducted to explore this hypothesis. Both experiments support the notion that the relationship between the target and contrast category significantly determines which critical features are extracted as being defining of either category. In particular, it determines the level of generality of these features. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

高炉煤气喷雾蒸发冷却系统设计应用

叙述了利用喷雾蒸发冷却技术对钢铁企业中高炉煤气进行降温的工程应用。介绍了相关的工作原理、工艺流程、工艺特点,给出了实际的技术方案。