短流程——钢铁生产工艺发展的潮流（一）

冶金生产工艺短流程是相对于传统的钢铁生产工艺流程而言的。有关专家表示，冶金企业通过减少传统钢铁生产工艺中的一些工序，以降低生产成本、提高劳动生率，这是二十世纪七八十年代以来，钢铁生产工艺流程发展的新潮流。近终形连铸、铁矿石直接还原与熔融还原、超高功率电炉等高新技术装备的发展，为冶金企业实现短流程生产工艺奠定了基础。专家认为，未来典型的钢铁生产工艺短流程将是：无焦炼铁——超高功率电炉／复吹转炉——薄板坯连铸连轧——冷连轧。     

Rheological behavior of continuous roll casting process of aluminum alloy

The rheological behavior of aluminum alloy and its influencing factors in physical simulation of continuous roll casting process were studied by using a Gleeble-1500 thermal-mechanical simulation tester with a set of special clamp system. The relationships between the flow stress and the strain rate in the deformation process of simulating roll casting experiment were obtained. The results show that four different characteristic stages exist in the temperature range of the whole rheological process. The first occurs when the temperature is higher than 600℃, which belongs to the creep deformation stage; the second occurs when the temperature lies in the range of 500 - 600℃, and it can be regarded as the high temperature and low stress level deformation stage; the third occurs when the temperature decreases to the range of 300 - 500℃, it is considered to be the middle stress level deformation stage; the last occurs when the temperature is less than 300℃ and the strain rate is less than 1.00 s^-1 , it belongs to middle stress level deformation stage. But when the strain rate is larger than 1.00 s^-1, it belongs to the high stress level deformation stage. And the relative constitutive models suitable for the four different stages of continuous roll casting process were established through multivariate linear regression analysis of the experimental data.     

Recovering limonite from Australia iron ores by flocculation-high intensity magnetic separation

Successful recovery of limonite from iron fines was achieved by using flocculation-high intensity magnetic separation （FIMS） and adding hydrolyzed and causticized flocculants according to the characteristic of iron fines. The separation results of the three iron samples are as follows： iron grade 66.77%- 67.98% and the recovery of iron 69.26%-70.70% by the FIMS process with flocculants. The comparative results show that under the same separation conditions the F1MS process can effectively increase the recovery of iron by 10. 97%- 15.73%. The flowsheet results confirm the reliability of the process in a SHP high intensity magnetic separator. The concentrate product can he used as raw materials for direct reduction iron-smelting. The hydrolyzed and causticized flocculants can selectively flocculate fine feebly-magnetic iron mineral particles to increase their apparent separation sizes. The larger the separation size, the stronger the magnetic force. By comparing the separation results of the three samples it is found that among the three samples the higher the limonite content, the better the separation result. This means that the separation result relates closely to the flocculation process and the adding pattern of the flocculant.     

添加导电纤维对羰基铁粉吸波性能的影响

本文研究了在羰基铁粉(CIP)吸波涂层中添加导电纤维对涂层的电磁参数和反射率的影响规律.发现导电纤维的添加使磁性金属微粉CIP吸波涂层的介电常数增大,使得吸波涂层的吸收峰向低频移动,有利于改善低频段的吸收效果;利用分块设计的方法可以拓宽吸波材料在全波段(2～18GHz)范围内的吸收频带;同时导电纤维的加入还降低了吸波涂层的面密度.     

电磁流量计的电极与励磁线圈不对称误差分析

本文从基本理论出发，对电磁流量计的电极和励磁线圈在实际制造中可能的不对称问题进行研究，求出响应的电势和磁势的分布，并进行了定量分析，得到由此引起的测量误差。     

201Cu不锈钢热轧开裂原因分析

本文利用金相显微镜和扫描电镜对201Cu不锈钢热轧开裂的原因进行了分析，得出连铸坯中存在大型夹杂物是其开裂的主要原因。     

薄板坯连铸高强度钢的微合金化选择

薄板坯连铸连轧技术（TSCR）为高强度热轧带钢的生产提供了最经济有效的工艺途径。研究结果表明，V—N微合金化非常适合TSCR工艺的要求，是发展高强度TSCR产品的一条经济有效的途径。采用TSCR技术生产微合金化高强度钢，可充分发挥细晶强化和沉淀强化的作用，并且已经能够成熟地生产出屈服强度为350600MPa级的高强度低合金钢。     

唐钢FTSR生产线冷轧用钢新品种的开发

与传统工艺相比，薄板坯连铸连轧所生产的产品晶粒细小、强度高、屈强比高、各向性能均匀，适合生产高强度钢板。唐钢薄板坯连铸连轧生产线开发冷轧用钢时，通过优化成分和工艺设计，生产中加强控制，防止LF精炼炉中增硅、增氮，连铸中加强保护浇注，轧制中严格各道次温度制度和表面质量控制，首次成功开发了冷轧料用钢。产品通过酸洗、冷轧、镀锌后能够满足后道工序的要求。     

连铸新工艺、新技术在CSP生产线的优化与应用

涟钢CSP连铸设备和技术是从SMS-DEMAG引进的，其主要工艺技术有MLC(结晶器液面自动控制)、LCR(液芯压下)、液压振动、在线调宽(调锥)、BPS(漏钢预报)、EMBr(电磁制动)、板坯清洗、SEN的在线升降等。由于各种原因，除了在线调宽(调锥)都进行了某种程度的优化和改进，到目前为止以上功能都投入正常使用，为涟钢CSP生产线生产稳顺、产品质量改善发挥了作用。     

涟钢CSP保护渣的选用

本文简要介绍了涟钢薄板坯连铸技术特点，对薄板坯连铸结晶器保护渣的要求和理化性能作了介绍，分析了涟钢薄板坯连铸结晶器保护渣的使用现状，提出改善保护渣使用效果的建议。