Installation for evacuating emanations in the taphole region of shaft furnaces

Abstract

An installation for evacuating emanations in the taphole region of a shaft furnace (e.g. blast furnace) of the type having a blast connection arrangement around the furnace bosh, together with a blast connection stage or platform for the inspection and servicing of the blast connections, and in which the molten metal is periodically tapped with the aid of tapping means and run off through a main tapping runner or spout includes the feature wherein a portion of the blast connection platform is adapted to be tilted away in the upward direction. This tiltable platform portion, when in its untilted position forms, together with vertical side walls which extend from the two side ends of the platform portion, a flue-like exhaust duct for the emanations produced directly in the taphole region. The present invention further comprises a movable exhaust hood connected to a stationary suction line and a mobile tapping spout hood having at the top an exhaust opening situated under the exhaust hood. The flue-like exhaust duct leads into the open end of the tapping spout hood (e.g., its end near the furnace) and both the emanations produced under the tapping spout hood and those passing out of the exhaust duct are drawn off through the top exhaust opening, the exhaust hood and the suction line connected thereto. Finally, the present invention also includes a transfer device for moving the mobile tapping spout hood and thus removing it from the tapping spout region in order to free space for the movement of the tapping appliances (e.g. taphole drilling machine and taphole gun).

Dependencies are inferred from the claim text.