Hydrometallurgical process for producing finely divided iron based powders
First Claim
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1. A process consisting essentially of:
- (a) forming an aqueous solution containing at least one iron group metal value,(b) forming a reducible solid metallic material selected from the group consisting of iron group metal salts, oxides, hydroxides and mixtures thereof from said solution,(c) reducing said material to form iron group based metallic powder particles,(d) entraining at least a portion of said powder particle in a carrier gas to form entrained iron group metal powder particles,(e) feeding said entrained particles and said carrier gas into a high temperature zone and maintaining said particles in said zone for a sufficient time to melt at least about 50% by weight of said particles, and to form droplets therefrom and(f) cooling said droplets to form iron group metal based particles having essentially a spherical shape and a majority of said particles having a size less than 20 micrometers.
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Abstract
A process for producing finely divided spherical iron group based metallic powders comprises forming an aqueous solution containing a source of the appropriate metal sources in a mineral acid, forming a reducible iron group based material from the solution, reducing the material to iron group based metal powder particles, subjecting the metal particles to a high temperature zone to melt a portion of the particles and to form droplets and cooling the droplets to form an essential spherical iron group based metallic powders.
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13 Claims
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1. A process consisting essentially of:
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(a) forming an aqueous solution containing at least one iron group metal value, (b) forming a reducible solid metallic material selected from the group consisting of iron group metal salts, oxides, hydroxides and mixtures thereof from said solution, (c) reducing said material to form iron group based metallic powder particles, (d) entraining at least a portion of said powder particle in a carrier gas to form entrained iron group metal powder particles, (e) feeding said entrained particles and said carrier gas into a high temperature zone and maintaining said particles in said zone for a sufficient time to melt at least about 50% by weight of said particles, and to form droplets therefrom and (f) cooling said droplets to form iron group metal based particles having essentially a spherical shape and a majority of said particles having a size less than 20 micrometers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification