原料车间吊钩秤称重系统信息化改造

介绍了河冶科技股份有限公司炼钢分厂针对原料工段出入库数据准确性差、盘库所需时间长等问题,对吊钩秤称重系统实施信息化改造的过程。通过铺设无线网络,为配料人员配备手持PDA,吊钩秤增加二次仪表等措施,实现了原料工段称重数据的自动采集,改变了库存管理流程,库存盘点由"每月一结"到随时查询,数据准确性明显提高。     

产品条码管理系统在白银有色集团产品检斤计量与出入库中的应用

介绍了以条码技术为依托实现白银有色集团铜、铅、锌、锌合金等产品检验、称重、配货的信息化管理和生产、销售、库存的精确化管理。     

SCR 连铸连轧生产线在线称重系统研究与应用

结合 SCR 铜杆连铸连轧生产线产品称重计量实践,研究了 SCR 铜杆连铸连轧生产线称重计量磅差产生的原因,以及称重故障的影响因素,探讨了生产线称重系统的控制方法,通过设计在线称重系统,提高了称重计量的准确性,降低磅差投诉,为 SCR 连铸连轧生产线提质增效奠定了良好的基础。     

数字式称重系统在物资计量中的应用

数字式智能称重传感器及数字称重系统是近些年来电子衡器领域应用的热点,文章介绍了120 t数字式称重系统在物资计量中的应用,以及该系统的结构和组成,并且着重分析了数字式称重系统的优点,实际应用表明,数字式称重系统能够满足现代化工业生产的要求.     

动态轨道衡的称重控制与信号处理

文中阐明了动态轨道衡称重信号的动态特性,无开关车型判别法的原理及实现过程,轨道衡称重重量、称重速度的计算方法.分析了动态轨道衡计量误差及提高称重精度的方法.     

RH真空铝料斗称重系统的简述

简述了炼钢厂RH炉真空铝料斗称量系统的组成及其采用的称重传感器和称重模块,并对称重传感器的安装和西门子称重模块的设定以及所涉及软件的使用过程进行了详细地介绍,同时对称重系统的标定方法、S7200CPU获得重量数据后程序的处理过程及信号的传递过程进行了介绍。     

原料仓桥式起重机称重控制系统改造实践

为保证原料配矿作业中投矿量的精确称重计量,中原黄金冶炼厂对原料配矿仓桥式起重机称重控制系统进行了改造。介绍了桥式起重机称重控制系统的改造技术方案:采用西门子PLC、称重模块和触摸屏组合代替传统的称重仪表,并且和电气控制系统相互独立,进行软件编程数据处理,将模拟量信号转化为质量信号。改造后,起重机称重控制系统符合国家3级秤的相关标准和要求,满足生产要求,简化了系统的结构,应用效果良好。     

浅谈250℃高温称重传感器的应用

介绍高温称重传感器的应用场合和选用特性,简述高温称重传感器的正确选择与保护措施。     

数字式称重传感器的校验

在现有的模拟式称重传感器校验系统的基础上,我们增加了托利多T800型称重显示仪表用来接收数字信号,并将其传输至计算机以对数字式称重传感器进行校验,取得了良好的效果,并分析了可能引入的系统误差。     

称重给料机在铝电解石油焦煅烧工艺的应用

叙述了称重给料机在石油焦煅烧工艺中的应用,重点介绍了称重给料机的工作原理、组成和技术特点.     

钢中界面科学研究进展(Ⅱ)

 钢中界面的化学成分、晶体结构、电子结构及其在变形、加热等外部环境作用下的演变行为等都深刻影响着钢的力学和化学行为,主导控制钢的力学、化学和加工性能。钢中界面往往是钢中新相的核点、变形的结点、裂纹的起点、腐蚀的源点。在一定程度上讲,弄清钢中界面科学问题,也就知道了钢失效的本质和提高钢质量的方向。在钢中界面科学研究(Ⅰ)的基础上,以钢中界面为研究对象,详细综述了界面对钢相变行为和服役使用性能的影响。分析了相界及相界成分或析出物偏聚对奥氏体向铁素体转变、奥氏体向贝氏体转变和逆转奥氏体相变的影响;探讨了界面以及界面成分偏聚对强度、塑性和韧性的影响;阐述了孪晶界、相界以及夹杂物/基体之间的界面在疲劳裂纹萌生和扩展方面起到的作用;重点关注了晶界、孪晶界调控以及晶界偏聚调控提高耐腐蚀性能的机理以及应用;分析了各种界面类型对抗氢脆性能的影响并简述了界面在蠕变性能劣化中起到的作用。同时简单介绍了机器学习在界面研究方面的应用,并指出了钢在服役性能中面临的界面科学问题以及今后重点研究方向的建议。     

新疆下巴特金矿床控矿因素及找矿标志

下巴特金矿床产于新疆西准噶尔地区安齐成矿带上盘东段,区内构造十分发育,自北向南分布有哈图、安齐和达尔布特等区域性断裂,构成主要呈NE、NEE向展布的构造体系。地层主要出露石炭系太勒古拉组海相火山碎屑岩和角砾岩等,其玄武岩和凝灰质砂岩等构成高背景含金层位并为成矿提供了丰富的矿源;区内岩浆岩大面积分布,铁厂沟、哈图和阿克巴斯陶等岩体呈环形包围该金矿床;矿床类型以蚀变岩+石英脉为主,产出分布严格受各序次构造控制并就位于高含金层位中,与岩浆作用密切相关。通过对矿床成矿特征的研究以阐述其层控、构控的赋存成矿机制,指明其找矿标志为沿构造充填的石英脉、构造碎裂岩及黄铁矿化、褐铁矿化、硅化、毒砂化等蚀变分带,进而为下一步矿床勘查及成矿预测提供指导依据。     

高炉焦炭在铁水中溶解行为研究现状及展望

 在当前及未来大型高炉高冶炼强度的条件下,加快焦炭在铁水中的溶解速率、提高高炉炉缸铁水的碳饱和度是削弱碳不饱和铁水对炉缸炉衬侵蚀、保证炉缸正常工作及延长高炉寿命的重要措施,同时可以为下游的炼钢工序提供部分热量来源。首先对国内外焦炭在铁水中溶解的试验和模拟研究方法进行了概括,然后对焦炭自身结构性能、焦炭中矿物质、铁水的物理性质等影响焦炭溶解速率的因素进行了详细分析。结果表明,碳结构的有序度和铁水温度的升高有利于焦炭的溶解,而焦炭中矿物质及铁水中硫、磷等元素的存在会抑制铁水的进一步渗碳。研究结果为高炉操作者理解焦炭在铁水中的溶解行为提供借鉴,指导钢铁工业的节能减排。     

大型冶金材料企业综合管理体系一体化推进的战略思路与发展探索

本文通过对建立和实施一体化管理体系的重要性、必要性、可行性的探讨，分析了推进质量、环境和职业健康安全管理体系一体化的结构和特点，提出了推进一体化管理体系的战略依据、战略思路与战略探索，并率先在全国冶金材料行业进行开拓创新的实践。     

Slab-on-Grade versus Framed Slab

This paper presents comprehensive and practical engineering review (not mathematics or computer science paper) of the observed behavior of the two types of slabs that have been used for the bottom floor slabs, at grade and underground, of buildings in the United States and overseas. The typical design of the slab-on-grade (SOG) built in the United States is described. The design requires only nominal reinforcing steel, but modern day design also requires ground preparation and improvement as necessary, including underslab perforated drainage pipe network embedded in the granular subbase, riser pipes, and a series of pumps. Sealing at all slab isolation joints and waterproofing membrane or water barrier system are provided for water tightness. The framed slab is supported directly on the building framing and on the building foundation. The design can accommodate the soil and underground water pressure and in itself is watertight as the slab is cast monolithically with the structural walls and footings. The behavior of the SOG depends so much on the behavior (soil properties) of the soil strata on which the slab is resting on. It is sensitive to the variation of the soil conditions at and around building foundations, leading to uneven bumpy and cracked slab and leaking basement. These were demonstrated in the report of short- and long-term performances of various projects in Thailand and United States in the past 25 years. The paper refers to various analysis and design techniques that may be used to improve the design of both the SOG and the framed slab for serviceability and economy. It is concluded that both types of slabs may be selected to suit the functions and serviceability requirements of the buildings. The SOG requires less concrete and reinforcement than those for the framed slab counterpart, but when all other factors are considered including additional underslab drainage and pump system, operating, and long-term performance and maintenance, the overall costs of both slabs may not be far apart, yet the performance and integrity of the framed slab will certainly be superior.     

Deterministic-Based Model of Slow Sand Filtration. II: Model Application

This paper describes the use of a deterministic slow sand filter process model to investigate and assess some of the fundamental aspects and mechanisms operating during slow sand filtration (SSF). These include the role of the schmutzdecke, biomass development, and the initial condition of the filter, to the overall process performance. The SSF process model has been developed recently and is described in a companion paper by Campos et al., in 2006. It attempts to provide a simulation of the physicochemical and biological processes responsible for the filtration mechanisms operating in SSF. The simulation of filter runs has been carried out with the help of extensive pilot plant data provided by Thames Water Utilities Ltd., involving both uncovered and covered filter beds. The results demonstrate that the presence and nature of a schmutzdecke layer profoundly influence the spatial and temporal development of interstitial biomass within the sand and, consequently, the headloss profile. Microbial interactions in the filter bed play a fundamental role in the process and are involved in setting the pattern and magnitude of headloss development. The model also demonstrates the significance of residual deposits within the filter after surface cleaning, on the subsequent filter behavior.     

包钢薄板坯连铸机结晶器振动台机构分析

应用机械原理、理论力学的基本理论,对薄板坯连铸连轧厂连铸机的结晶器振动台进行机构的分析转化和运动学分析,得出振幅的调整方法和结晶器的位移和速度函数,并进行推理和定量分析.     

Roadway Heaving Caused by High Organic Matter

A forensic study was conducted to investigate the premature pavement failure of heaving and cracking on the north bound lane of SH6 and to determine (1) the causes of the heaving and cracking; (2) the severity and extent of the problem; and (3) a prevention strategy. Ground penetration radar (GPR), falling weight deflectometer (FWD), dynamic cone penetrometer (DCP), and soil boring and laboratory tests were conducted. Soil maps provided by the Natural Resource Conservation Service (NRCS) and the electrical resistivity tomography (ERT) were utilized to locate areas that may have similar problems for the ongoing project. It was concluded that the heaving was caused by high organic content in soils. The low pH of the lime treated subgrade layer indicated that the lime stabilization was ineffective. This was due to the high concentration of organic matter. FWD and DCP results indicated that the heaved/cracked areas are losing structural load support. Approximately 84% of the bumps/dips detected by the profiler were also detected by the GPR. Based on the GPR results, it was estimated that about 1.2?miles of the roadway may have potential heaving in the future. Although it is not a standard practice to determine the organic content of soil for new construction, it is critical to determine the organic matter through soil boring and laboratory testing in the suspicious areas. It was found that the soil maps provided by the NRCS yielded a reasonable estimate, and can be used as a screening tool. All five locations (O1 to O5) identified by ERT were verified by boring and laboratory tests to have high organic content (1.9–3.3%). Boring results indicated that ERT was able to map the soil strata and could differentiate between sandy and clay soil types. Although ERT was able to identify the anomalies with high organic contents, and the results were confirmed by boring and laboratory testing, additional work is needed to refine the procedure.     

热轧带钢残余应力相关板形缺陷机理分析及攻关措施

对残余应力相关板形缺陷归纳统计,按产生机理划分为瓢曲与翘曲两大类问题,侧弯与C翘分别是瓢曲和翘曲典型代表缺陷。侧弯与浪形存在相互对应关系,分析显性浪形、隐性浪形控制现状,发现精轧存在人工修改目标凸度设定值现象;建立平整机三维有限元模型,对比分析不同凸度带钢平整后横向应力分布情况,采用“小凸度+空过平整”措施,侧弯平均值从15.2降低至4.97 mm。因下支撑辊传动,带钢变形区存在搓轧区导致带钢上下表面应力差,导致C翘缺陷产生,这种现象通过动态显性有限元分析进一步得到验证,对比分析工艺参数,开展试验设计(DOE),通过工艺参数优化,C翘平均值从27.6降低至10.5 mm。     

Formation and Evolution of the Jiuduansha Shoal over the Past 50 Years

The formation and geomorphic evolution of the Jiuduansha Shoal are investigated over the past 50 years in this paper. The sedimentary processes, formation, and geomorphic evolution of the Jiuduansha Shoal in the Yangtze River Estuary, eastern China, are analyzed based on digitized sea maps from 1945 to 2001, satellite images from 1975 to 2001, and field survey data in the spring-neap tidal cycle in the dry and flood seasons in 2003. The suspended sediment concentration and hydrodynamics of the North Passage and South Passage during the dry and flood seasons in the spring-neap tidal cycle in 2003 were investigated, and relations between the North Passage and South Passage of the Jiuduansha Shoal are analyzed. Results show that seasonal and spring-neap tidal cycle variations in sediment and water discharge from the drainage basin correspond to erosion and deposition on the Jiuduansha Shoal. The results and data can provide useful information for the management of the Yangtze River Estuary and restoration of the estuarine tidal flat ecology.