Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By mechanically introducing gas into material
Patent
1974-01-07
1976-03-09
Arnold, Donald J.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By mechanically introducing gas into material
106 387, 264 30, 264 63, C04B 3504
Patent
active
039432165
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.
REFERENCES:
patent: 1616055 (1927-02-01), Marks
patent: 2148642 (1939-02-01), Ricard
patent: 2606161 (1952-08-01), Marling
patent: 2628209 (1953-02-01), Fisk
patent: 3008847 (1961-11-01), LaBerge
patent: 3255500 (1966-06-01), Engel et al.
patent: 3445410 (1969-05-01), Coulter
Marr and Treffner, "Microstructure of Periclase and Carbon in BOF Refractories," Ceramic Bulletin, Vol. 51, No. 7 (1972), pp. 582-586.
Arnold Donald J.
Brunsvold Brian G.
General Refractories Company
Mintz Herbert H.
Murray, Jr. Everett H.
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