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Viscosities Behavior of CaO-SiO_2-MgO-Al_2O_3 Slag With Low Mass Ratio of CaO to SiO_2 and Wide Range of Al_2O_3 Content

查看全文 作　　者：TANG Xu-[1]long;ZHANG Zuo-[2]tai;GUO [1]Min;ZHANG [1]Mei;WANG Xi-[2]dong 高影响力作者 机构地区：[1]Metallurgical and Ecological Engineering School, University of Science and Technology Beijing,Beijing 100083, China;[2]College of Engineering, Peking University, Beijing 100871, China高影响力机构 出　　处：《Journal of Iron and Steel Research(International)》索引2011年第18卷第2期,共7页高影响力期刊 基　　金：Item Sponsored by National Natural Science Foundation of China (50874013);National Key Technology Research and Development Programof China (2007BAB15B04);Program for New Century Excellent Talents in University of China(NCET-07-0071, NCET-08-0723) 摘　　要：The present paper is aimed at recycling of coal ash and blast furnace slag to produce mineral wool. Considering the mineralogical constitutions of coal ash and blast furnace slag,the primary quaternary slag compositions of CaO-SiO2-MgO-Al2O3 with basicity (mass ratio of CaO to SiO2) ranging from 0.5 to 0.9 and alumina ranging from 5% to 20% were investigated through a rotating cylinder method. The experimental results indicated that the viscosities decreased with increasing basicity above the liquidus temperature,and increased with increasing alumina content,and the maximum values were reached and as the alumina content was 20%,followed by the decrease with further increasing alumina content due to its amphoteric behavior. The amphoteric behavior of Al2O3 also performed in the relationship between viscosity and non-bridging oxygen per tetrahedrally-coordinated atom (NBO/T),and the viscosities decreased with increasing the NBO/T except the slag with a basicity 0.5 and Al2O3 20% which have a low NBO/T value and a low viscosity than others. 关 键 词：viscosity mineral wool NBO/T SLAG
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