Pipe segment for a transfer line for transporting hot...

Pipes and tubular conduits – Plural duct – Coaxial

Reexamination Certificate

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Details

C138S112000, C138S113000, C138S149000, C138S148000, C138S108000, C285S123160, C285S419000

Reexamination Certificate

active

07997303

ABSTRACT:
The present invention relates to a pipe segment including an outer and an inner pipe section, with the inner pipe section being positioned within the outer pipe section, and a support means supporting the inner pipe section in relation to the outer pipe section so that the inner pipe section can expand axially relative to the outer pipe section in response to temperature changes in the material being transported in the pipe segment. Furthermore, the present invention refers to a transfer line for transporting hot particulate material, such as iron ore fines, in a carrier gas, including a plurality of these pipe segments and to a process for transporting hot particulate material in a carrier gas in a direct smelting plant for producing molten metal from a metalliferous feed material, in particular between a pretreatment unit and solid delivery means in the form of lances for injecting the material into a direct smelting vessel.

REFERENCES:
patent: 3371186 (1968-02-01), Traviley
patent: 3563572 (1971-02-01), French
patent: 3573337 (1971-04-01), Grimm et al.
patent: 3865145 (1975-02-01), McKay et al.
patent: 4084842 (1978-04-01), Stonitsch et al.
patent: 4219224 (1980-08-01), Hanley
patent: 4221405 (1980-09-01), Stonitsch et al.
patent: 4363504 (1982-12-01), De Feo et al.
patent: 5901753 (1999-05-01), Ziu
patent: 6086114 (2000-07-01), Ziu
patent: 6231087 (2001-05-01), Ziu
patent: 20040228981 (2010-09-01), None
patent: 2437944 (2001-07-01), None
patent: 2504469 (2002-08-01), None
patent: 2572193 (2003-09-01), None
patent: WO 02/02827 (2002-01-01), None
PCT International Search Report for PCT/EP2004/011699 mailed Feb. 4, 2005.

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