汉钢钢渣制备微晶玻璃的实验研究

发布时间：2018-03-05 04:38

  本文选题：钢渣　切入点：微晶玻璃　出处：《西安建筑科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：钢铁工业是重要的原材料部门,为制造业的各个领域提供重要的钢铁材料。当前我国钢铁工业规模已经连续多年保持世界第一,并遥遥领先。粗钢年产量接近8亿吨,占世界总产量50%左右。然而,庞大的产业规模同时也带来了大量固体废弃物。钢渣是钢铁工业排放量仅次于高炉渣的固体废弃物,排放量约为粗钢产量的15%~20%。但利用率远低于高炉渣,仅约为10%~20%。大多处于堆放状态,不仅占用了大量的土地,也给自然环境造成了巨大压力。相较于传统的钢渣利用途径,利用钢渣研制微晶玻璃有着更大的经济潜力。特别是在“十三五”时期我国经济深化供给侧结构性改革,人民群众普遍对生态环境有了更高的要求的大背景下,传统重工业研究发展绿色循环经济就显得尤为迫切。本文利用陕西钢铁集团汉中钢铁公司所出产的转炉钢渣尾矿,采用熔融法工艺研究制备CaO-MgO-Al_2O_3-SiO_2系统微晶玻璃。作为冶金资源综合利用方面的研究,尽可能提高冶金固体废弃物的利用率是一大核心问题。因此本文着重研究了钢渣引入比对微晶玻璃析晶、组织、性能的影响。实验结果表明,在本文所设计的基础玻璃配方中,钢渣引入比不大于40wt%时,微晶玻璃试样难以实现整体晶化。钢渣引入比超过60wt%前,提高钢渣引入比能较显著地促进基础玻璃的析晶。钢渣引入比在55wt%~60wt%左右时,微晶玻璃试样多种性能的综合表现较优。所制得的微晶玻璃中的晶体主要为辉石、透辉石相,晶体颗粒大小约为0.2~0.5μm左右。在筛选出较优的原料配比的基础上,为了制定出更优的热处理制度。利用正交实验法,以试样的弯曲强度为考察指标,对“两步法”阶梯式热处理制度进行了调整优化。结果表明在“成核温度730℃,保温1h;晶化温度840℃,保温2h;”的热处理制度下,试样的弯曲强度最高,达到192.8MPa。
[Abstract]:The iron and steel industry is an important raw material sector, providing important steel materials for various fields of manufacturing. At present, the scale of China's iron and steel industry has been in the first place in the world for many years, and is far ahead. The annual output of crude steel is close to 800 million tons. It accounts for about 50% of the world's total output. However, the huge industrial scale also brings a large amount of solid waste. The steel slag is the only solid waste in the iron and steel industry, which is second only to the blast furnace slag. The discharge amount is about 150.20% of the output of crude steel. But the utilization ratio is far lower than that of the blast furnace slag, only about 10% of them are in stacking state, which not only occupies a lot of land, but also creates great pressure on the natural environment. Compared with the traditional ways of utilizing steel slag, The use of steel slag to develop glass-ceramics has greater economic potential. Especially in the context of deepening supply-side structural reforms in China's economy during the 13th Five-Year Plan period, the people generally have higher demands on the ecological environment. Traditional heavy industry research and development of green recycling economy is particularly urgent. This paper uses converter steel slag tailings produced by Hanzhong Iron and Steel Corporation of Shaanxi Iron and Steel Group. The glass-ceramics of CaO-MgO-Al_2O_3-SiO_2 system were prepared by melting process, which was used as a comprehensive utilization of metallurgical resources. It is a core problem to improve the utilization ratio of metallurgical solid waste as much as possible. Therefore, the effect of slag ratio on crystallization, microstructure and properties of glass-ceramics has been studied. The experimental results show that, in the basic glass formula designed in this paper, When the introduction ratio of steel slag is not more than 40wt%, it is difficult to realize the whole crystallization of glass-ceramics sample. Before the introduction ratio of steel slag is more than 60wt%, the increase of slag introduction ratio can significantly promote the crystallization of the base glass. When the slag introduction ratio is about 55wt% or 60wt%, The crystal in the glass-ceramics is mainly pyroxene and diopside phase, and the size of the crystal is about 0.2 渭 m. On the basis of selecting the optimum ratio of raw materials, the crystal size of the glass-ceramics sample is better than that of other glass-ceramics samples. In order to establish a better heat treatment system, the "two-step method" step heat treatment system was adjusted and optimized by using orthogonal test method and the bending strength of the sample as the inspection index. The results showed that the nucleation temperature was 730 鈩，

本文编号：1568802