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Title: Calcium metal as a scavenger for antimony from aluminum alloys

Previous work has shown that trace amounts of antimony (Sb) can affect the mechanical properties of strontium (Sr) modified aluminum castings. ANL has been investigating technology to remove or neutralize Sb to reduce its negative effect on the physical properties of those alloys. Review of past work on processing and recovery of scrap aluminum inferred that calcium (Ca) is an effective scavenger of Sb, bismuth, lead and cadmium. Following up on that lead, we have found that Ca is, indeed, effective for removing Sb from molten aluminum alloys although its effectiveness can be compromised by a wide range of processing conditions. A minimum ratio of about four to one, by weight, of Ca to Sb appears necessary to insure an effective scavenging of contained Sb.in 356 aluminum alloys.
Authors:
; ;
Publication Date:
OSTI Identifier:
82482
Report Number(s):
ANL/ES/CP-84366; CONF-950201-17
ON: DE95012290
DOE Contract Number:
W-31-109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: Annual meeting and exhibition of the Minerals, Metals and Materials Society (TMS), Las Vegas, NV (United States), 12-16 Feb 1995; Other Information: PBD: 4 Oct 1994
Research Org:
Argonne National Lab., IL (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CALCIUM; USES; ANTIMONY; REMOVAL; ALUMINIUM ALLOYS; PURIFICATION