A Simple Method of Evaluating the Thermal Properties of Metallurgical Cokes under High Temperature

The reactivity index of weight loss (RI) and tumbling strength after the reaction (I-10(600)) of manufacturing coke were first tested at a temperature series of 1100, 1200, and 1300 degrees C under CO2 atmosphere with different compositions and duration times to study the effects of temperature, time, and gas composition on coke hot strength. Then the RI/I-10(600), carbon structure, and optical texture of the cokes prepared from different single coals were mainly studied after a solution reaction with CO2 under a high temperature of 1300 degrees C and a standard temperature of 1100 degrees C. It was found that temperature greatly affects the RI/I-10(600) of coke, especially at high temperatures up to 1300 degrees C. Compared with standard tests under 1100 degrees C, the changes of RI/I-10(600) for different cokes are very different at 1300 degrees C, and the changes are greatly related to coke optical texture. Under a high temperature in the testing method, the tumbling strength of cokes with more isotropy increased, whereas it decreased for those with less isotropy. This simple method of using high temperature could yield the same results when compared with complicated simulated blast furnace conditions.

Automated summary

The research found that the weight loss and tumbling strength of coke are influenced by temperature and gas composition, with significant variations in properties of different cokes at 1300 degrees C, closely related to optical texture.