DETERMINATION OF POLONIUM-210 AND LEAD-210 IN IRON- AND STEEL-MAKING MATERIALS

摘要

Within an integrated iron- and steel-making plant, production of steel involves a series of linked processes whereby iron is extracted from iron ores in a blast furnace and converted to steel in the Basic Oxygen Steel-making (BOS) process. Iron ores are initially prepared as a feed suitable for the blast furnace by sintering, an agglomeration process which blends iron ores, fluxes, reductant in the form of coke, and reverted materials from the steel works. Tata Steel operates two such integrated sites in the United Kingdom, producing nearly 7 million tonnes of steel per annum and using many millions of tonnes of raw materials resulting in significant quantities of by-products and wastes.