Conversion Of A Severe Environmental Pollutant Electric Arc Furnace Dust (EAFD) To A Valuable Corrosion Inhibitor For Steel In Chloride Contaminated Reinforced Concrete Structures

摘要

EAFD is a hazardous solid waste and environmental pollutant which is generated in the collection of particulate material during steelmaking process via electric arc furnace. It is a fine powder passed through cooling pipes and then filled and kept in specially designed bag filters. The world generation of EAFD is estimated to be around 3.7 million tons per year. Such significant quantity is due to the fact that for every ton of recycled steel an amount of 15-20 kg of EAFD is produced [1,2]. It had been a problem for many years as it acquires a fair deal of money to be taken care of and to save the environment from its polluting effects. The cost of EAFD disposal is not negligible. For example, 200 million dollars per year are necessary to dispose EAFD in the United States [3-5].