Powder metallurgy processes – Forming articles by uniting randomly associated metal particles – Powder pretreatment
Patent
1993-12-09
1995-08-22
Walsh, Donald P.
Powder metallurgy processes
Forming articles by uniting randomly associated metal particles
Powder pretreatment
419 66, 419 30, 75767, 75772, 75755, B22F 100
Patent
active
054437881
ABSTRACT:
The subject invention relates to method for briquetting fines and ultrafines comprising mixing the fines and ultrafines on a continuous basis with a binder system having low viscosity of up to about 200 cps and at least 50% solids, such that the resulting briquette contains less than about 3% binder by weight of the briquette.
The invention further relates to a process for producing briquettes from fines and/or pretreated ultrafines comprising discharging the fines and/or pretreated ultrafines into a high speed mixer; discharging the components of a binder system into the high speed mixer through fog nozzles simultaneously with the discharge of the fines and/or pretreated ultrafines; agitating the binder and the material to produce a homogeneous binder-fines-ultrafines mixture; discharging the homogeneous binder-fines-ultrafines mixture into a delay box for a period of time such that the mixture is at the point of incipient cure; discharging the mixture at the point of incipient cure into a briquetting press and forming briquettes therefrom; discharging the briquettes onto a heated conveyor for a period of not longer than 4 minutes to cure the briquettes, and collecting the cured briquettes.
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Palowitz Francis S.
Sathe Sudarshan R.
Chi Anthony R.
Palsat International, Inc.
Walsh Donald P.
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