The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 2002
Filed:
Dec. 02, 1999
Andreas Schultheis, Langenselbold, DE;
Heraeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
A method for the cleaning of SiO grain is known whereby SiO grain comprising contaminations is heated to a temperature at which the contaminations soften or form melting agglomerates with the SiO grain, thus separating the contaminations and the SiO grain. On this basis and to specify a method which achieves high grain purity at comparatively little expenditure of time, material and costs, and to provide a simple device suitable for the implementation of the method, it is proposed according to the invention that the SiO grain is fed to and heated in a gas stream which is directed towards an impingement plate, the SiO grain being accelerated in the direction of the impingement plate such that softened contaminations or melting agglomerates adhere to the impingement plate and cleaned SiO grain is removed from the impingement plate. A simple device suitable for the implementation of the method is provided with a burner into which a burner gas is introduced for a, burner gas flame, and a feeder device by means of which the SiO grain containing contaminations is fed to the burner gas or the burner gas flame, as well as an impingement plate toward which the burner gas flame is directed.