电炉还原熔炼氧化钴矿的生产实践

介绍了刚果(金)钴铜冶炼厂电炉还原熔炼处理钴铜氧化矿工艺的设计特点及生产实践。     

中锰渣在生产锰硅合金中的应用

通过生产实践,探索并总结出以中锰渣为主要原料,在生产普通锰硅合金中的操作要点.     

电渣炉智能控制系统的开发与应用

递减功率熔炼控制被认为是保证电渣炉钢锭质量的有效的控制方法。根据电渣工艺优化的要求，开发了基于递减功率熔炼控制为核心的电渣炉智能控制系统。该系统具备连续有载调压和电极插入位置精确控制的功能。系统在近20台工业电渣炉上得到应用，实际运行结果表明系统可靠性高、运行稳定、人机界面好、易于操作和维修，能达到预期的各项工艺操作控制要求，特别是在保证钢锭结晶质量、降低电耗和加快生产节奏方面效果明显。     

鞍钢铁水脱硫扒渣发展综述

为了满足生产低硫高附加值产品的需要，铁水预处理作为钢铁冶金生产工艺的一个重要手段，越来越得到业内人士的认同，特别是铁水炉外脱硫扒渣近年来发展较快。介绍鞍钢铁水脱硫扒渣发展的3个阶段及扒渣工艺设备的优化与改进情况；对国产脱硫工艺设备、美国ESM复合喷粉脱硫工艺设备以及德国POLYSUIS复合喷粉脱硫工艺进行了全面的对比分析。鞍钢铁水脱硫扒渣发展过程充分实践了鞍钢“高起点、少投入、快产出、高效益”的技改方针。     

艾萨炉渣和转炉渣混合贫化机理的探讨

从贫化电炉处理艾萨炉渣和转炉渣的特性出发,分析和探讨了氧势、锍品位、Fe3O4、渣含铜之间的关系,以及Fe3O4还原的热力学和动力学条件。指出了贫化电炉的控制重点是Fe3O4还原以及还原剂的选择。     

Cold Modelling of Slag Splashing in LD Furnace by Oxygen Lance with Twisted Nozzle Tip

The effects of a conventional lance tip with 4 normal nozzles and a lance tip with 4 twisted nozzles on slag splashing were investigated. A cold model for LD converters, Jiuquan Iron & Steel Co., was established and the amount of slag splashed onto the model walls was measured in the cold modelling experiments. The results from the experiments show that at low top gas flow rate the amount of slag splashing for the tip with twisted nozzles is less than that for the conventional tip, whereas at high top gas flow rate the amount of slag splashing for the nozzle twisted lance is greater than that for the conventional lance. For the nozzle twisted lance tip, slag splashing rates increase with increase in slag amount, lance height and top gas flow rate and the maximum amount of slag splashing for the tip with twisted nozzles can be obtained under the process parameters of 47.6 Nm³/h gas flow rate, 12% slag amount and 247 mm lance height. More slag droplets can be directed onto the cone with a nozzle twisted lance tip than with a normal lance tip at high top gas flow rate.     

Determination of Inclusion Characteristics in the Asea‐SKF Process using the Modified Spark‐Induced OES Technique as a Complement in Studying the Influence of Top Slag Composition

The spark‐induced modified optical emission spectroscopy (OES) technique developed by Ovako Steel makes it possible to rapidly determine inclusion characteristics in steel samples. In earlier investigations using the modified spark‐induced OES technique for steel samples taken from billets, predicted oxygen contents agreed well with results from conventional melt extraction analyses. In this investigation, samples taken during ladle treatment in an ASEA‐SKF ladle furnace were analysed using the modified OES technique. When comparing the results with inclusion characteristics determined by conventional analysis, similar trends were found. Plant trials were also carried out where three different top slag compositions were used. The purpose was to evaluate if the modified OES technique can be used to study the effect of changes in the refining operation on inclusion characteristics. Results indicated that the modified OES technique could be used to determine the effect of a changed slag composition on the inclusion characteristics in the steel. Since the modified OES method provides rapid feedback of inclusion characteristics, it has the potential of being used for faster optimisation of ladle refining operations.     

钢渣在建筑领域的综合利用及展望

在介绍钢渣特性基础上,综述了钢渣在建筑领域的综合利用途径,并从钢渣的综合利用技术现状出发,提出了目前存在的问题,展望了钢渣利用的未来发展趋势.     

影响钛渣电炉炉体寿命的因素及延长措施探析

以国内外钛渣电炉生产实践为例，提出影响钛渣电炉炉体寿命的因素。从技术和经济的角度上，提出延长其使用寿命、降低造价成本的措施，并在某厂新建6300kVA钛渣电炉上实施，取得良好的生产效果。     

武钢磨细钢渣粉在高性能混凝土中的应用

介绍武钢钢渣粉在混凝土中应用的一系列试验,分析了钢渣粉的掺入及其对混凝土强度和凝结时间的影响。