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Title: Powder collection apparatus/method

Abstract

Device for separating and collecting ultrafine atomized powder from the gas stream of a gas atomizing apparatus comprises a housing having an interior wall oriented at an angle relative to horizontal so as to form a downwardly converging, conical expansion chamber, an inlet conduit communicated to the expansion chamber proximate an upper region thereof for receiving the gas stream, and an outlet proximate a lower region of the expansion chamber. The inlet conduit is oriented at a compound inclined angle (with respect to horizontal) selected to promote separation and collection of powder from the gas stream in the expansion chamber. The compound angle comprises a first entrance angle that is greater than the angle of repose of the powder on the housing interior wall such that any powder accumulation in the inlet conduit tends to flow down the wall toward the outlet. The second angle is selected generally equal to the angle of the housing interior wall measured from the same horizontal plane so as to direct the gas stream into the expansion chamber generally tangent to the housing interior wall to establish a downward swirling gas stream flow in the expansion chamber. A powder collection container is communicated tomore » the outlet of the expansion chamber to collect the powder for further processing.« less

Inventors:
 [1];  [1];  [1]
  1. Ames, IA
Issue Date:
Research Org.:
Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
OSTI Identifier:
869118
Patent Number(s):
5277705
Application Number:
07/997,725
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
powder; collection; apparatus; method; device; separating; collecting; ultrafine; atomized; gas; stream; atomizing; comprises; housing; interior; wall; oriented; angle; relative; horizontal; form; downwardly; converging; conical; expansion; chamber; inlet; conduit; communicated; proximate; upper; region; receiving; outlet; compound; inclined; respect; selected; promote; separation; entrance; repose; accumulation; tends; flow; equal; measured; plane; direct; tangent; establish; downward; swirling; container; collect; processing; horizontal plane; angle relative; atomized powder; interior wall; apparatus comprises; gas stream; upper region; expansion chamber; inlet conduit; apparatus comprise; collection apparatus; housing interior; atomizing apparatus; stream flow; gas atomizing; /55/

Citation Formats

Anderson, Iver E, Terpstra, Robert L, and Moore, Jeffery A. Powder collection apparatus/method. United States: N. p., 1994. Web.
Anderson, Iver E, Terpstra, Robert L, & Moore, Jeffery A. Powder collection apparatus/method. United States.
Anderson, Iver E, Terpstra, Robert L, and Moore, Jeffery A. Tue . "Powder collection apparatus/method". United States. https://www.osti.gov/servlets/purl/869118.
@article{osti_869118,
title = {Powder collection apparatus/method},
author = {Anderson, Iver E and Terpstra, Robert L and Moore, Jeffery A},
abstractNote = {Device for separating and collecting ultrafine atomized powder from the gas stream of a gas atomizing apparatus comprises a housing having an interior wall oriented at an angle relative to horizontal so as to form a downwardly converging, conical expansion chamber, an inlet conduit communicated to the expansion chamber proximate an upper region thereof for receiving the gas stream, and an outlet proximate a lower region of the expansion chamber. The inlet conduit is oriented at a compound inclined angle (with respect to horizontal) selected to promote separation and collection of powder from the gas stream in the expansion chamber. The compound angle comprises a first entrance angle that is greater than the angle of repose of the powder on the housing interior wall such that any powder accumulation in the inlet conduit tends to flow down the wall toward the outlet. The second angle is selected generally equal to the angle of the housing interior wall measured from the same horizontal plane so as to direct the gas stream into the expansion chamber generally tangent to the housing interior wall to establish a downward swirling gas stream flow in the expansion chamber. A powder collection container is communicated to the outlet of the expansion chamber to collect the powder for further processing.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

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