Coke solution-loss degradation model with non-equimolar diffusion and changing local pore structure

Method for Simulating Gas Permeability of a Coke Bed Including Fines Based on 3D Imaging on the Coke Particle Morphology

“…Shungo NATSUI, 1,5) * Azuma HIRAI, 2) Koki TERUI, 3) Yusuke KASHIHARA, 4) Akinori MURAO 4) Yuji MIKI 4,5) and Hiroshi NOGAMI 1,5) operational instabilities.…”

“…breakdown into smaller particles) has been the subject of intense study in blast furnace operation because fine particles get detached from the coke particles and affect the permeability of the coke bed. [3][4][5] Several researchers have studied the governing mechanisms of coke degradation and clogging in packed beds both experimentally 6,7) and numerically, [8][9][10][11] and more recently, using machine learning. 12) Most attempts to assess multiphase flow (including fines and gas) in packed beds have involved the correlation of the holdup with the pressure drop or other variables through the application of empirical or semi-empirical approaches.…”

Variability in Metallurgical Coke Reactivity Index (CRI) and Coke Strength after Reaction (CSR): An Experimental Study

“…At 1100 °C, the solution loss region was the largest and increased in local porosity, which was relatively homogeneous, whereas in the coke outer-surface region, the solution loss region and degradation region occurred at 1300 °C. Still, variability at 1150 °C for CO 2 concentration and local porosity within the coke led to the highest coke degradation and the lowest coke strength after reaction. − The literature also reported that the sensitivity of the coke CRI and CSR determined from the quality control laboratories should be adequate because it depends on several operating parameters like heating rate, bulk density, moisture content, temperature, etc. ,− Also, many researchers have developed a prediction model based on various factors that can give insight into coke quality based on data mining techniques. − Therefore, in this study, the authors have conducted detailed research on factors affecting variability in coke reactivity test under the standard test condition for laboratory and commercial coke samples produced from stamp charge batteries using a specially designed sample holder probe. The study of inter-laboratory comparison test (ILCT) on CSR and CRI at different laboratories is also part of the present research.…”

Effect of Different sp2 Bond Contents on the Reactivity and Mechanical Properties of Coke Carbon: A ReaxFF Molecular Dynamics Study

“…As a reactive substance with both reducibility and high strength, coke remains one of the most important raw materials in the metallurgical production industry worldwide. – Coke provides both heat for the ironmaking process and structural support for the melting zone of the blast furnace. The physical strength of coke is one of the important factors for the stable operation of blast furnaces. – Zhang et al found that high reactivity of the coke matrix and small pore size of coke can effectively avoid the erosion of coke by gasification . Pang et al also found the influence of the pore structure and microstructure on the mechanical properties of coke through orthogonal gasification experiments .…”