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Title:
SODIUM-FREE FLUX AND PROCESS FOR TREATMENT OF MOLTEN ALUMINUM ALLOY WITH THE SAME
Document Type and Number:
WIPO Patent Application WO/2006/109810
Kind Code:
A1
Abstract:
The invention provides a sodium-free flux which is to be used in treating a molten aluminum alloy in a rotary flux injection/ degassing apparatus and which can inhibit the adhesion and build-up of unreacted flux and attain high deslaging effect; and a process for treatment of a molted aluminum alloy with the flux, more specifically, a sodium-free flux which consists by mass of 80 to 95 % AlF3, 2.5 to 10% KCl, and 2.5 to 10 % K2SO4 as the essential components and at most 5 % total of other chlorides, fluorides and nitrates as the balance component; and a process for treatment of an aluminum alloy which comprises keeping the rotor of the above apparatus in a state immersed in a molten aluminum alloy, injecting an inert gas and the above flux into the molten aluminum alloy from nozzles, and rotating the rotor at 200 to 450 rpm to thereby make inclusions contained in the molten alloy float up to the surface of the molten alloy together with fine bubbles and the flux and thus carry out degassing and deslaging.

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Inventors:
KURAMASU YUKIO (JP)
OZAWA MASAYUKI (JP)
Application Number:
PCT/JP2006/307681
Publication Date:
October 19, 2006
Filing Date:
April 05, 2006
Export Citation:
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Assignee:
NIPPON LIGHT METAL CO (JP)
KURAMASU YUKIO (JP)
OZAWA MASAYUKI (JP)
International Classes:
C22B9/10; C22B9/05; C22B21/06; F27D27/00
Foreign References:
JPS61243136A1986-10-29
JPS5947337A1984-03-17
JP2002309320A2002-10-23
JPH05209237A1993-08-20
JP2005023367A2005-01-27
JPS63183136A1988-07-28
JPS62297422A1987-12-24
Attorney, Agent or Firm:
Aoki, Atsushi (Toranomon 37 Mori Bldg. 5-1, Toranomon 3-chom, Minato-ku Tokyo 23, JP)
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