Top submerged injecting lances
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United States of America Patent
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Dec 27, 2016
Grant Date -
Jun 5, 2014
app pub date -
Jun 27, 2012
filing date -
Jun 30, 2011
priority date (Note) -
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Abstract
A lance for conducting a pyrometallurgical operation by top submerged lancing (TSL) injection, has inner and outer substantially concentric pipes. The lower end of the inner or at least a next innermost pipe is set at a level relative to the lower end of the outer pipe required for the pyrometallurgical operation. The relative positions of the inner and outer pipes are longitudinally adjustable to enable the length of the mixing chamber to be maintained at a desired setting during a period of use to compensate for the lower end of the outer pipe wearing and burning back.
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