Peter the Great St. Petersburg Polytechnic University (St. Petersburg, Russia):

I. V. Butorina, Dr. Eng., Professor, e-mail: butorina_irina@mail.ru

Baltic State Technical University (St. Petersburg, Russia):
M. V. Butorina, Cand. Eng., Associate Prof.

At the production of one ton of steel in the mining and metallurgical industry up to four tons of solid wastes are formed. By chemical composition they can be separated for inorganic, organic and mixed wastes. Modern technologies make it possible to utilize these wastes almost completely obtaining various types of raw materials and finished products. The article gives an overview of the technologies for disposal of waste of the mining and metallurgical industry. It is shown that the most part of waste is inorganic silicate waste: overburden, mine dumps, tailings, construction waste and slags. These wastes can be completely used in construction industry and for arrangement of dumps of waste products. Options for recycling iron-containing wastes, such as scrap metal, scales, dust and dehydrated sludge from gas cleaning at steelmaking plants, are considered in the article. Organic wastes such as spent rubber products, waste containing oil products, waste wood, oily rags, etc. can be burned in metallurgical furnaces without  damage to the quality of the metal and the environment, with the receipt of additional thermal energy. However, the best way to utilize organic and mixed waste is to use them for obtaining marketable products such as raw materials for rubber and furniture industries, and production of bioenergy (energy chips, fuel briquettes and pellets) and pyrolysis products (biogas, bio-cok, pyrolysis oil).

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