| 摘要 |
<p>High-temperature dirty gas from an electric furnace (1) is directly introduced into scrap preheaters (5a, 5b, 5c), where scrap (6) to be charged into an electric steel-making furnace is preheated. If some portion of heat generated in the electric furnace is absorbed by scrap, electric energy necessary for melting scrap is reduced and further time required for steelmaking is shortened. Flue gas which is in an impure state after having preheated scrap, carrying bad-smelling substances such as paint or oily soot, is lead through a gas scrubbing tower (19) to a wet type electrostatic precipitator (20), where the impurities are removed before being discharged to the atmosphere. Waste scrubbing water (23A) and waste water from the precipitator (30A) is sprayed into the flue gas (2) from the electric furnace to burn bad-smelling substances therein, so that evacuation of waste water is avoided, resulting in the prevention of environmental pollution.</p> |
