EFBF

Project name: Efficient fuel for a blast furnace (EFBF)

Project duration: 09.2011 – 08.2015

Contact person: Stanislav Gornostayev

Background. Metallurgical coke, which is a compound of carbon and inorganic phases, is a key material for a blast furnace (BF) iron making, acting as a major fuel (energy source), a reductant, a carburisation agent and a structural support. Natural reserves of coking coal are limited and the standards for BF iron making are becoming increasingly strict, encouraging steel producers to implement environmentally friendly processes, while trying to maintain cost efficiency. In this regard, the production of high quality coke requires a better control of its properties as well as sustainable and economic management of coke oven gases and solid residues. The project is focused on detailed laboratory studies and theoretical investigations of inorganic compounds and carbon-based matrix of feed and BF coke and experimental cokes made with addition of various plastics.

The objectives of the project include the investigations of: Contact phenomena between mineral phases and coke matrix in the feed and BF coke; Solid-solid, solid-C and solid-gas reactions between minerals and coke matrix in the feed and BF coke; Mode of occurrence, size and composition of Fe-Si droplets on the surface of BF coke and their relationships with the coke matrix; Properties of “contact coke” from coke oven, including of carbon spheres on its surface; Intercalation features of K, Na, Ba, Sr and Ca with graphite; Heterogeneity of pore-surrounding matter in the feed and experimental cokes; How coking process proceeds when coking coal without and with varying amounts of plastics, including measurements of gas phases; Physical properties of coke fines agglomerates made with various primary (cement) and secondary (waste lime, ashes from pulp and paper industry, blast furnace and other type of slags from steel industry) binders; Utilization potentials of coke oven gases and coke fines agglomerates applying ideas of industrial ecology. The project will utilize modern research tools and methods, including: sophisticated equipment for samples preparation; Optical and Scanning electron microscopes; Confocal Raman Microscope System; Electron-probe micro analyser, Chamber furnace, Blast Furnace Gas Simulator, X-Ray Diffraction spectrometer; X-Ray Fluorescence spectrometer and Inductively coupled plasma mass spectrometer.

The main results of the project are expected to be a considerably deepened knowledge on the coking and BF processes as well as related issues of industrial ecology.

Last updated: 15.4.2015