Burner and method for the manufacture of synthetic quartz glass

摘要

A burner for use in the manufacture of synthetic quartz glass is provided, which comprises a main burner ( 7 ) comprising a multi-tube assembly ( 1 ) including a center tube ( 2 ) for feeding a silica-forming compound, a first enclosure tube ( 3 ) surrounding the center tube for feeding a combustion-supporting gas, and a second enclosure tube ( 4 ) surrounding the first enclosure tube for feeding a combustible gas; a tubular shell ( 5 ) surrounding the multi-tube assembly for feeding a combustible gas; and a plurality of nozzles ( 6 ) disposed within the tubular shell for feeding a combustion-supporting gas. A double-tube assembly ( 8 ) is disposed so as to surround the forward opening of the main burner ( 7 ) for feeding a combustion-supporting gas. Synthetic quartz glass ingots having high optical homogeneity are produced.