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Primary Examiner: Arnold, Donald J.
Assistant Examiner: Parrish, John
Attorney: Murray, Jr.; Everett H., Brunsvold; Brian G., Mintz; Herbert H.

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Title: Production of periclase refractory utilizing alkyd resins

Abstract: Improved periclase refractories are prepared by using an alkyd resin binder for tempering and pressing periclase grains into refractory shapes such as bricks. The pressed shapes are dried and fired. After firing, the refractory shapes are impregnated under vacuum with molten pitch and can then be used as lining in basic oxygen steelmaking furnaces. The fired refractory bricks have a greatly improved modulus of rupture at 1482.degree.C. of 3000-4000 p.s.i. The alkyd resin is generally incorporated in amounts of 2.5 to 4.5 weight percent. The green strength of the alkyd resin bonded bricks can be improved by adding a strong organic acid to the alkyd resin prior to mixing it with periclase grains. The green strength of bricks produced from such a mixture is between 30 and 40 p.s.i.

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Inventors: Bakker, Wate Thewis (Anne Arundel County, MD, US)

Application Number: 431558
Filing Date: 1974-01-07
Publication_date: 1976-03-09
Assignee: General Refractories Company (Bala Cynwyd, PA)
Primary Class(es): 264/660 106/38.7, 264/30, 264/669, 264/670
Other Classes:
US Patent Ref:

1616055	Feb, 1927	Marks	264/56.
2148642	Feb, 1939	Ricard	106/38.
2606161	Aug, 1952	Marling	260/22.
2628209	Feb, 1953	Fisk	260/22.
3008847	Nov, 1961	LaBerge	260/40.
3255500	Jun, 1966	Engel et al.	106/38.
3445410	May, 1969	Coulter	260/22.

Other Refs: Other References: Marr and Treffner, "Microstructure of Periclase and Carbon in BOF Refractories," Ceramic Bulletin, Vol. 51, No. 7 (1972), pp. 582-586.