Rheological Analysis Of Blast Furnace Synthetic Slag Admixtures Of Al2o3
The nature and properties of ionic liquid solutions - metallurgical slags (used in the pig iron and steel production) affect the quality and processing time of the final product. The reactions mostly occur in the interfaces between metal-slag, slag-gas, slag-solid, during their contacts, often under dynamic conditions, rarely in the static state. It is generally assumed that liquid slags exhibit a behaviour similar to ideal Newtonian viscous flow. At the same time it is assumed that the liquid slag has a structural likeness to synthetic polymers, which are not Newtonian fluids. The authors tried to verify the prevailing views and hypotheses. The main study concerned the slag system: CaO-SiO2-MgO-Al2O3, when the content of Al2O3 was raised to ca. 25％ in liquid and semi-liquid state. Measurements were performed using Searles method of concentric cylinder systems. Graphite measuring systems were used for testing with two types of spindles: smooth and perforated. Rheological measurements were carried out for five slag systems in the temperature range between 1310-1500℃, the shear rate values were changed in the wide range between 1s-1 to 150s-1. FactSage application was used to calculate the amount of solid phases precipitating from the slag volume for different chemical compositions in different temperatures. Based on the rheological results, it was found that the analysed slag systems in the completely liquid temperature range show similarity to the perfectly viscous Newtonian body. However, in the temperature range in which the solid phases occurred in the slag the analyzed systems show non-Newtonian behaviour.
liquid slags rheology non-Newtonian flow
Piotr Migas Marta Korolczuk-Hejnak Miros(l)aw Karbowniczek
Department of Ferrous Metallurg， Faculty of Metal Engineering and Industrial Computer Science, AGH-University of Science and Technology, 30-059 Krakow, Poland
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-15
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）