Patent ID: 6301285
Filing Date: 2001-10-09
Classification: F27B,F27D

Abstract:
In an electric arc furnace of the type tiltable for tapping metal out of the spout, a system for collecting emissions from the furnace comprising:a hood disposed near the furnace for collecting emissions from the furnace and movable with the furnace;a tilting duct connected to the hood to receive emissions from the hood and having a tilting planar surface surrounding a tilting opening through which emissions may pass;a stationary duct having a stationary planar surface surrounding a stationary opening, the stationary planar surface being parallel and adjacent to the tilting planar surface;the stationary opening having a larger area than the area of tilting opening;the stationary opening being sized and shaped so that a part of the tilting opening is adjacent a part of the stationary opening throughout the entire range of motion of the tilting duct;a plurality of damper blades sized and positioned to selectively open and close to allow air flow through portions of the stationary opening when open and to limit air flow through portions of the stationary opening when closed; anda fan connected to draw collected emissions through the tilting opening and through a part of the stationary opening adjacent to the tilting opening.