Properties of coking coal and quality of blast furnace coke

Author: Zhou Shiyong
Publisher:
Publish Date: 2005-06-01
Features: This book is a summary of the author's nearly 20 years of continuous research work in the fields of coal coking and ironmaking. The content is divided into nine chapters:
Chapter 1 primarily discusses the best indicators for assessing the degree of influence of various formation factors of coal and reviews the advantages and disadvantages of current coking coal quality indicators. It also conducts research and exploration on indicators representing the third formation factor of coking coal.
Chapter 2 focuses on the microscopic components of different variable degrees of coking coal, detailing their dynamics during heating and their respective influences on coke quality.
Chapter 3 describes the role of coke in blast furnaces, a series of chemical reactions, as well as the factors and processes of coke degradation in blast furnaces, including the influence of oxygen-enriched coal injection during degradation.
Chapter 4 studies the comparison of various conventional and unconventional detection indicators of tuyere coke at different cross-sectional positions and corresponding furnace coke under different coal injection levels in large blast furnaces, thereby inferring the patterns of changes in coke properties in blast furnaces.
Chapter 5 investigates the quantity and characteristics of unburned residual carbon in the swirl zone and residual carbon escaping from the top of the blast furnace, thereby deducing the combustion behavior of various petrographic microscopic components of high-degree metamorphic anthracite and low-degree metamorphic bituminous coal in the swirl zone and their effects on blast furnace production and coke quality as they rise with the airflow to the furnace body.
Chapter 6 describes the primary conditions for creating a simulated carbon dissolution reaction environment in the softening zone of the blast furnace.
Chapter 7, based on the research results and production effects of the previous six chapters, proposes that the current coke quality indicators M40, M10, CRI, and CSR are insufficient in simulating the degradation of coke in blast furnaces and may lead to misguided practices, resulting in increased costs for coke raw materials and the inefficient utilization of national coking coal resources.
Chapter 9 outlines the current status of various fields related to coking coal and blast furnace coke, and proposes the tasks that coking coal research should undertake.
The book is divided into nine parts, including: an analysis of the properties of coking coal and an evaluation of its indicators, the roles of various microscopic components of coking coal in coke formation, the degradation process and factors of coke in blast furnaces, and the changes in coke properties in blast furnaces under different coal injection levels.