Abstract
Molten blast furnace (BF) slag is a kind of liquid resource with abundant waste heat which has not been recycled in the iron and steel industry. At present, the treatment of blast furnace slag is usually water quenching and air cooling accumulation. But, there are some disadvantages in this way to the treatment of blast furnace slag, such as serious air pollution and high water consumption. This paper describes the preparation of expanded slag ball with blast furnace slag by rotary cup. The effects of rotating speed, diameter of rotary cup and water content on particle size distribution, vitreous content, and grind ability of slag ball were studied. The blast furnace slag ball produced by this method is capable of self-drying because of its own heat. It does not need follow-up dehydration, drying, and other processes to save energy.
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