Cold Strength and High Temperature Behaviors of Self-Reducing Briquette Containing Electric Arc Furnace Dust and Anthracite

Electric arc furnace dust (EAFD) is generated in considerable amounts by the electric arc steelmaking process. During melting in an electric arc furnace, certain elements volatilize, and form fine dusts after cooling. The EAFD is collected in a baghouse and amounts to approximately 1–2 wt% of the steel produced.1) In China, about 800 million tons of steel was produced in 2015 with more than 9 wt% equipped with electric arc furnaces, generating about a million tons of electric arc furnace dust every year. On one hand, EAFD has a great amount of iron and it has been widely considered as a kind of secondary resource. On the other hand, EAFD has been designated as a hazardous waste, which means that it cannot be disposed of at landfills without treatment. In order to recover iron element and avoid environmental pollution, most of iron and steel enterprises send EAFD back to sintering machine. However, EAFD has another exceedingly evident characterization that it also has a large amount of zinc. The zinc content varies with the operating conditions such as the characteristics of scraps charged in the furnace, period of operation, specification of the steel produced and so on. Then, the problem is that both the sintering process and the blast furnace ironmaking process could not remove zinc from sintering Cold Strength and High Temperature Behaviors of Self-Reducing Briquette Containing Electric Arc Furnace Dust and Anthracite