Title:
METHOD FOR PREPARING POWDER, MULTI-INJECTION NOZZLE, AND APPARATUS FOR PREPARING POWDER
Document Type and Number:
WIPO Patent Application WO/2015/030456
Kind Code:
A1
Abstract:
The present invention relates to an apparatus and a method for preparing powders of pure metals, alloys, ceramics, and composites thereof for industrial applications. The method according to the present invention comprises: a first cooling process for cooling high-temperature dissolved powder materials to be particles of a semi-liquid state in which liquid metals and solid metals are mixed when molten metals are solidified by injecting a cooling medium (N2, Ar, He, air, water, or mixtures thereof) using a ring-shaped injection nozzle; a second cooling process for cooling the particles by collision with the outer side of a conical cooling roller that is installed at the lower end of the ring-shaped spray nozzle and rotates at high speed in the cooling process; a third cooling process for cooling the cooled particles by collision with the inner side of a hollow cooling cylinder that is installed and fixed on the outer side of the conical cooling roller and performs the cooling process; and a process for recovering solid fine powder cooled by an impeller that is installed on the lower side of the conical cooling roller, thereby preparing alloy powder having a homogeneous microstructure and easily adjusting the size and shape of the powder.
Inventors:
SONG CHANG BIN (KR)
Application Number:
PCT/KR2014/007910
Publication Date:
March 05, 2015
Filing Date:
August 26, 2014
Export Citation:
Assignee:
NAT UNIV KONGJU IND ACAD COOP (KR)
International Classes:
B22F9/08
Foreign References:
| KR20120097807A | 2012-09-05 | |||
| JP2004269956A | 2004-09-30 | |||
| JP2672041B2 | 1997-11-05 | |||
| JP2012111993A | 2012-06-14 |
Attorney, Agent or Firm:
KIM, JUNG SU (KR)
김정수 (KR)
김정수 (KR)
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