Patent ID: 6610115
Filing Date: 2003-08-26
Classification: B04C,C21B

Abstract:
A dust extraction installation for blast furnace gas comprising:a preliminary cleaning stage formed by a large cyclone separator and connected to a blast furnace gas pipe coming from a blast furnace; and a fine cleaning stage arranged downstream of said preliminary cleaning stage; wherein said large cyclone separator includes: a vertical pressure vessel having a top end, a bottom end, a central vertical axis and a lateral wall; a feed device at said top end including a conical inlet bell, which expands downwards towards a bottom edge, so that an annular gap is defined between said bottom edge of said conical inlet bell and said lateral wall of said pressure vessel, said feed device being designed so that said blast furnace gas pipe can be connected to said feed device from above and so that said feed device feeds the blast furnace gas in an axial direction into said annular gap; and a swirling device with guide blades arranged in said annular gap, said swirling device being designed so that the blast furnace gas, which is axially fed into said annular gap, is subjected to a swirling movement about said central vertical axis of said pressure vessel.