本文選題：鋼渣　切入點(diǎn)：微晶玻璃　出處：《西安建筑科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：鋼鐵工業(yè)是重要的原材料部門,為制造業(yè)的各個(gè)領(lǐng)域提供重要的鋼鐵材料。當(dāng)前我國鋼鐵工業(yè)規(guī)模已經(jīng)連續(xù)多年保持世界第一,并遙遙領(lǐng)先。粗鋼年產(chǎn)量接近8億噸,占世界總產(chǎn)量50%左右。然而,龐大的產(chǎn)業(yè)規(guī)模同時(shí)也帶來了大量固體廢棄物。鋼渣是鋼鐵工業(yè)排放量僅次于高爐渣的固體廢棄物,排放量約為粗鋼產(chǎn)量的15%~20%。但利用率遠(yuǎn)低于高爐渣,僅約為10%~20%。大多處于堆放狀態(tài),不僅占用了大量的土地,也給自然環(huán)境造成了巨大壓力。相較于傳統(tǒng)的鋼渣利用途徑,利用鋼渣研制微晶玻璃有著更大的經(jīng)濟(jì)潛力。特別是在“十三五”時(shí)期我國經(jīng)濟(jì)深化供給側(cè)結(jié)構(gòu)性改革,人民群眾普遍對生態(tài)環(huán)境有了更高的要求的大背景下,傳統(tǒng)重工業(yè)研究發(fā)展綠色循環(huán)經(jīng)濟(jì)就顯得尤為迫切。本文利用陜西鋼鐵集團(tuán)漢中鋼鐵公司所出產(chǎn)的轉(zhuǎn)爐鋼渣尾礦,采用熔融法工藝研究制備CaO-MgO-Al_2O_3-SiO_2系統(tǒng)微晶玻璃。作為冶金資源綜合利用方面的研究,盡可能提高冶金固體廢棄物的利用率是一大核心問題。因此本文著重研究了鋼渣引入比對微晶玻璃析晶、組織、性能的影響。實(shí)驗(yàn)結(jié)果表明,在本文所設(shè)計(jì)的基礎(chǔ)玻璃配方中,鋼渣引入比不大于40wt%時(shí),微晶玻璃試樣難以實(shí)現(xiàn)整體晶化。鋼渣引入比超過60wt%前,提高鋼渣引入比能較顯著地促進(jìn)基礎(chǔ)玻璃的析晶。鋼渣引入比在55wt%~60wt%左右時(shí),微晶玻璃試樣多種性能的綜合表現(xiàn)較優(yōu)。所制得的微晶玻璃中的晶體主要為輝石、透輝石相,晶體顆粒大小約為0.2~0.5μm左右。在篩選出較優(yōu)的原料配比的基礎(chǔ)上,為了制定出更優(yōu)的熱處理制度。利用正交實(shí)驗(yàn)法,以試樣的彎曲強(qiáng)度為考察指標(biāo),對“兩步法”階梯式熱處理制度進(jìn)行了調(diào)整優(yōu)化。結(jié)果表明在“成核溫度730℃,保溫1h;晶化溫度840℃,保溫2h;”的熱處理制度下,試樣的彎曲強(qiáng)度最高,達(dá)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，

本文編號：1568802