作者：MASAKAZU IIDA;EIZO MAEDA;SATOSHI TERAYAMA;

作者单位：Shinagawa Refractories Co.. Ltd. 707, Imbe, Bizen-shi, Okayama 705-8577;Shinagawa Refractories Co.. Ltd. 707, Imbe, Bizen-shi, Okayama 705-8577;Shinagawa Refractories Co.. Ltd. 707, Imbe, Bizen-shi, Okayama 705-8577

刊名：Journal of the Technical Association of Refractories

ISSN：0285-0028

出版年：2010-01-05

卷：30

期：3

起页：168

止页：177

分类号：TQ175

语种：英文

关键词：Tap-hole material;Injection into blast furnace;Rheological property;Capillary rheometer method;Bingham fluid;

内容简介

Rheological properties of tap-hole materials were characterized by using a capillary rheometer method. The materials were extruded through the capillary of a die at different speeds, and the resistance was measured. The resistance increased with time and maintained a maximum value while the material was extruding through the capillary. The shear rate and shear stress were calculated from the extrusion speed and the resistance, respectively. From the relationship between the shear stress and the shear rate, the tap-hole materials were found to behave as a Bingham fluid. Injection pressure changes of a tap-hole material were also measured with time in a real blast furnace. By comparison of lab tests and the injection pressure changes, it was estimated that the materials were injected into the furnace in the shape of a rope, with a diameter of around 80 mm and length of about 30 m or less, which heaped up in free space in the furnace.