Hearth structure of rotary furnace hearth

Details Hearth structure of rotary furnace hearth Hearth structure of rotary furnace hearth

2006-09-15

2011-11-15

Stoner, Kiley (Department: 1735)

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

Horizontal, rotatable, cylindrical type

C266S274000

Reexamination Certificate

active

08057736

ABSTRACT:
The present invention discovers a new structural design technique which provides clearances between refractories13and fills the clearances with various types of refractories or refractory materials like in the past and, furthermore, uses another method to secure the heat expansion absorption function and provides a hearth structure of a rotary furnace hearth1able to prevent contact between the hearth structure and furnace side walls3and4caused by heat expansion of the refractories13and realize safe and smooth operation, that is, a hearth structure of a rotary furnace hearth laying two or more layers of refractories between side blocks9and10built at the inner circumferential end and outer circumferential end of a hearth refractory bed7of a rotary furnace hearth1and laying a powder or pellet hearth material16on its top surface, the hearth structure of a rotary furnace hearth1characterized by using refractories having a compressive strength of 0.1 to 5 MPa at 800 to 1500° C. for the refractories14laid at least at the topmost layer.

REFERENCES:
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patent: 2001-254114 (2001-09-01), None
patent: 2001-324274 (2001-11-01), None
patent: 2002-310564 (2002-10-01), None
patent: 2002350065 (2002-12-01), None
patent: 2003-185348 (2003-07-01), None

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