Injection lance with variable swirl

摘要

A fuel injection lance for an ore-smelting furnace includes a central conduit, a first conduit and a second conduit. The first and second conduits are concentric with the central conduit. A central conduit is connected to a fuel mixture. The first and second conduits are in flow communication with a gas source. The first and second conduits have gas flowing at independently controllable gas flow rates relative to the other conduit. A swirl portion has a cylindrical body with a hollow interior cylinder, and vertical and helical channels formed within the body portion. Vertical channels traverse the body portion vertically to the outer surface adjacent to the bottom surface. Helical channels traverse the outer surface in a helical pattern. Vertical channels intersect with corresponding helical channels at a predetermined angle selected to provide a desired particle distribution of a fuel injected into the furnace.

主权项

1. A swirl portion of a fuel injection lance for an ore-smelting furnace, the swirl portion comprising:
a cylindrical body portion, a top surface, a bottom surface, an outer surface, and a hollow interior cylinder extending through the body portion along a center axis; and a plurality of vertical channels and a plurality of helical channels formed within the body portion; each of the vertical channels entering the body portion at the top surface at a radial distance intermediate the interior cylinder and the outer surface, and traversing the body portion vertically to the outer surface adjacent the bottom surface; each of the helical channels traversing the outer surface between the top surface and the bottom surface in a helical pattern, each of the vertical channels intersecting with a corresponding one of the helical channels adjacent the bottom surface at a predetermined angle selected to provide a desired particle distribution of a fuel injected into the furnace.