Method for producing hard metal granulate

Details Method for producing hard metal granulate Method for producing hard metal granulate

2005-02-08

2005-02-08

Jenkins, Daniel (Department: 1742)

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

C419S030000, C419S032000

Reexamination Certificate

active

06852274

ABSTRACT:
A hard metal granulate is produced by wet milling and spray drying in a spray tower using pure water as the liquid phase. The spray tower is configured and operated in such a way that a ratio of the quantity of water added via the slurry (in liters per hour) to tower volume (in m3) is between 0.5 and 1.8 and in that a maximum of 0.17 kg of slurry is atomized per m3of incoming drying gas. The slurry has a solid particle concentration within a range of 65-85% by weight. Under these conditions, the addition of a water-soluble, long-chain polyglycol to the slurry prior to spraying previously required in order to prevent oxidation of the hard metal granulate is no longer necessary.

REFERENCES:
patent: 4070184 (1978-01-01), Scheithauer, Jr. et al.
patent: 4397889 (1983-08-01), Benjamin et al.
patent: 5348914 (1994-09-01), Thometzek et al.
patent: 299 858 (1992-05-01), None
patent: 0 763 605 (1997-03-01), None
patent: WO 9624454 (1996-08-01), None

Affiliated with

Also associated with

Rating

Method for producing hard metal granulate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for producing hard metal granulate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing hard metal granulate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3481084