不同改质剂对硅锰渣微晶玻璃析晶性能调控的比较  

Comparative of different modifiers on the crystallization properties of glass-ceramics derived from silicon manganese slag

作　　者：杨金成 李宇 杨天 YANG Jincheng;LI Yu;YANG Tian(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083

出　　处：《工程科学学报》2023年第11期1918-1927,共10页Chinese Journal of Engineering

基　　金：国家自然科学基金资助项目(U1960201)。

摘　　要：以硅锰渣为主要原料,分别添加高硅、高铁和含铬的改质剂硅石、铁鳞和铬铁渣,采用Petrurgic一步法制备了微晶玻璃,对微晶玻璃样品进行X射线衍射(XRD)、差示扫描量热分析(DSC)、扫描电子显微镜(SEM-EDS)等测试和分析,讨论了添加不同改质剂对硅锰渣微晶玻璃矿相和性能的影响规律.研究表明:将改质熔渣冷却至析晶温度保温和700℃退火后,获得满足天然花岗岩石材对性能要求的微晶玻璃.相对于原硅锰渣,改质熔渣的析晶性能都获得了显著提升,其中铁鳞和铬铁渣更有利于促进粒度为0.2~0.5μm粒状或短棒状辉石晶体形成,这些晶体为固溶了Fe、Mn离子的普通辉石(Ca(Mg,Fe,Al)(Si,Al)_(2)O_(6))和钙锰辉石(CaMnSi_(2)O_(6))等.添加改质剂均改变了硅锰渣中Mn离子的赋存形态,原渣中Mn离子主要以玻璃相和硫化锰形式存在,改质后样品中的锰离子主要赋存于钙锰辉石中.Direct casting of smelting slag into glass–ceramic is considered as an efficient way to simultaneously utilize“slag”and“heat”to prepare high value-added materials,owing to which has become a research hot spot.In this paper,silico–manganese slag was used as the main raw material,and silica,iron scale,and ferrochromium slag respectively as high-silicon,high-iron and chromium-containing modifiers.Furthermore,glass–ceramics were prepared using the Petrurgic one-step method.The Petrurgic one-step method is a heat treatment method for preparing glass–ceramic using controlled crystallization during slag cooling process.Using X-ray diffraction(XRD),differential scanning calorimetry(DSC),scanning electron microscopy(SEM-EDS)and other tests,the effect of adding different modifiers on the mineral phase and properties of silicon–manganese slag glass–ceramics were discussed.Furthermore,the feasibility of preparing glass–ceramics by online modification of silicon–manganese slag was discussed based on thermal balance calculation and analysis.The research revealed that by cooling the modified slag to the crystallization temperature and annealing at 700℃,glass–ceramics that meet the performance requirements of natural granite can be obtained.Herein,the optimal sample of glass–ceramic had a flexural resistance of 74.67 MPa,bulk density of 2.95 g·cm^(-3),and water absorption rate of 0.08%.The crystallization performance of the modified slag was considerably improved compared with that of the original silico–manganese slag,and the iron scale and ferrochromium slag were more conducive to promoting the formation of granular or short rod-shaped pyroxene crystals with a particle size of 0.2–0.5μm.The obtained products have pyroxene group crystals,such as augite(Ca(Mg,Fe,Al)(Si,Al)_(2)O_(6))and johannsenite(CaMnSi_(2)O_(6))with a solid solution of Fe and Mn ions.The addition of modifiers altered the occurrence form of Mn ions in the silico–manganese slag.Mn ions in the original slag were mostly found

关 键 词：硅锰渣 微晶玻璃 改质 析晶 锰离子固结 

分 类 号：TF09[冶金工程—冶金物理化学]