Method for the control of surface properties of magnesium particles
AssigneeNorsk Hydro a.s.
InventorSurendra K. Saxena
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Abstract
The invention concerns a method for control of the properties of the remaining oil layer on magnesium or magnesium alloy particles and/or other reactive metal particles produced from molten metal. The particles are cooled in a cooling oil with subsequent centrifuging and heating to remove remaining oil. A part of the oil layer on the particles is replaced with a lighter oil, preferably during centrifuging. The oil can be supplied as a spray. The light oil is supplied in an amount of 0.5-10 weight %. The light oil used should have a viscosity <5 cP at 25.degree. C. and a flashpoint <100.degree. C. Preferably it is used oils having a viscosity <2.5 cP and a flash point between 30.degree. and 75.degree. C. It is preferred to use dearomatized oil.
Claims9
A method for removing oil remaining on magnesium or magnesium alloy particles produced from molten metal which is cooled in a cooling oil, which method comprises centrifuging said particles, and subsequently heating said particles to remove remaining oil, wherein a second oil having a viscosity and boiling point lower than the viscosity and boiling point of said cooling oil is added to said particles having said cooling oil thereon.
Dependencies are inferred from the claim text.