宁夏非金属矿产资源的基本特征及合理开发对策

分析了宁夏非金属矿产资源的成矿地质背景，基本特征，讨论了可持续发开发利用的基本对策。     

Modification of Nonmetallic Inclusions in Steel with Yttrium

The modification affects of yttrium on formation of nonmetallicinclusions in steel has been studied by use of metallographic method. The effect of added quantity of modificater on type and size of inclusions was also studied in this work.     

Dynamic mass variation and multiphase interaction among steel,slag, lining refractory and nonmetallic inclusions: Laboratory experiments and mathematical prediction

The mass transfer among the multiphase interactions among the steel, slag, lining refractory, and nonmetallic inclusions during the refining process of a bearing steel was studied using laboratory experiments and numerical kinetic prediction. Experiments on the system with and without the slag phase were carried out to evaluate the influence of the refractory and the slag on the mass transfer. A mathematical model coupled the ion and molecule coexistence theory, coupled-reaction model, and the surface renewal theory was established to predict the dy-namic mass transfer and composition transformation of the steel, the slag, and nonmetallic inclusions in the steel. During the refining process, Al2O3 inclusions transformed into MgO inclusions owing to the mass transfer of [Mg] at the steel/refractory interface and (MgO) at the slag/re-fractory interface. Most of the aluminum involved in the transport entered the slag and a small part of the aluminum transferred to lining re-fractory, forming the Al2O3 or MgO·Al2O3. The slag had a significant acceleration effect on the mass transfer. The mass transfer rate (or the re-action rate) of the system with the slag was approximately 5 times larger than that of the system without the slag. In the first 20 min of the re-fining, rates of magnesium mass transfer at the steel/inclusion interface, steel/refractory interface, and steel/slag interface were x, 1.1x, and 2.2x, respectively. The composition transformation of inclusions and the mass transfer of magnesium and aluminum in the steel were predicted with an acceptable accuracy using the established kinetic model.     

大功率风电机组用轴承钢中非金属夹杂物特征及来源分析

采用非水溶液电解法萃取大功率风电机组用轴承钢轧材中的非金属夹杂物,结合SEM和EDS分析,对夹杂物的形貌、尺寸、成分及类型进行表征,并分析其可能来源。结果表明,该风电轴承钢轧材中非金属夹杂物主要包括Al-Ca-Si-Mg系氧化物和Al-Ca-Si-Mg系硫化物两大类;在钢中T[O]含量仅为0.0007%时,仍存在以SiO2为主的Al-Ca-Si-Mg系大型夹杂物。     

Q235连铸板坯中非金属夹杂物的分析

为了进一步提高产品质量,提高钢材的纯净度,采用了光学显微镜、扫描电镜、x射线能谱仪以及电解称重法对威钢板坯连铸生产过程中非金属夹杂物的类型、数量、大小、组成及分布等进行了研究,并且讨论了目前生产工艺中非金属夹杂物的来源．结果表明：板坯的夹杂物主要是小于φ 10 um的球形硅酸盐夹杂物,有少量的多边形夹杂物;有单相的也有多相的夹杂物;在板坯厚度和宽度方向上都是在1／4和1／3位置处出现聚集．夹杂物主要是由于钢液脱氧产生的内生夹杂物．     

无机非金属材料的现状与前景

本文简述了无机非金属材料,包括水泥、玻璃、陶瓷、耐火材料、人工晶体、半导体材料等的现状与前景。     

高炉非金属冷却壁用耐火浇注料合理配置的研究

针对高炉各部位使用条件的差异，对高炉非金属冷却壁用耐火浇注料的合理配置进行了研究．结果表明，在炉身工作温度低于800℃的上部选用矾土水泥结合的高铝质浇注料；在800-1000℃的炉身下部选用纯铝酸钙水泥结合的高铝质浇注料；在工作温度高，渣侵蚀比较严重的妒腰部位用抗侵蚀性好，冷却强度大的纯铝酸钙水泥结合高铝-碳化硅质浇注料．     

皖西非金属矿产资源可持续开发利用和保护的对策思考

皖西非金属矿产资源丰富,它的开发利用应以优势矿产为重点,搞好统一规划与管理。笔者在分析了皖西非金属矿产资源开发利用存在问题的基础上,从可持续发展战略的角度,提出了若干环保对策。一是应始终贯彻执行“谁开发谁受益谁治理”的原则;二是加强非金属矿山的环境地质工作;三是开发环保型矿产品,走生态矿业之路。     

碳纤维增强塑料电导率的研究现状

碳纤维增强塑料(carbon fiber reinforced plastic,CFRP)作为一种新型无机非金属基复合材料,具有优良的机械性能和力学性能,在工业和国防领域均得到广泛关注,特别是在汽车行业和大飞机生产过程。作为重要性能参数之一,电导率的研究对于CFRP的无损探伤、预防雷击、电磁屏蔽等具有重要意义。在深入分析CFRP的导电原理的基础上,综合考虑其不均匀性和各向异性,分别从实验方法、解析方法和数值仿真等方面对目前流行的CFRP电导率检测技术进行总结和对比,提出了更简单实时的实验方案,更精确有效的仿真模型和解析是下一步CFRP电导率研究的方向和目标。     

LF钢包精炼过程中的脱氧

研究了钢包精炼过程中钢水流动现象及吹氩对钢液中固脱氧产物去除行为的影响和不同脱氧条件下吹氩过程对钢中溶解氧的去除规律,指出合理的吹氩制度对钢液中固相脱氧产物的去除至关重要。当钢液不用铝脱氧时,吹氩过程对钢液中溶解氧的去除具有十分重要的意义。