7TH EUROPEAN COKE AND IRONMAKING CONGRESS - ECIC 2016

Reduction disintegration of sinter at low temperature is one of important factors to maintain the stable operation of the blast furnace. The main factor of the disintegration is volumetric expansion of the iron oxide phase due to the reduction from hematite to magnetite at the temperature from 673 to 873 K. Furthermore, it is reported that the disintegration of sinter by CO reduction is caused...

The gasification of metallurgical cokes with CO2 and H2O on their porosity and macro-strength were investigated in the current study. Cokes were reacted with CO2 or H2O in the temperature range of 1100 to 1500oC. During the reaction, the compositional change of product gases were measured by Quadruple Mass Spectrometry (QMS) for evaluating the gasification rate. Image analysis was carried out...

According to the metallurgical conditions of CSC, the influences of MgO content, Al2O3 content and C/S (=CaO/SiO2) on slag fluidity are studied for blast furnace operation. The liquidus temperature and viscosity of a semi-synthetic slag are measured using an optical softening temperature device and a viscometer, respectively. Based on these measured data, equations of liquidus temperature and...

The Sapozhnikov plastometer is an integral part of the classification system for coking coal in China. While there have been many studies of the Sapozhnikov plastometer over a long period of time, the interpretation of the results of the procedure remain heuristic. We have developed a detailed model of the Sapozhnikov plastometer, based upon the mechanistic effects occurring during the...

Here we present a model of the formation mechanism of sinter mineralogy and microstructure in highly fluxed sinter (CaO/SiO2 ~2.8-3.8), obtained by detailed investigation of quenched flame front and final sinter product samples. Contrary to the suggestion of several other studies, the observations here indicate only negligible solid-solid reaction and formation of low temperature Ca-ferrites...