ROTATIONAL LANCE DRIVE AND ROTATIONAL LANCE INJECTION METHOD

摘要

Rotary lance drives for rotating a lance for injecting gas and powdered reagents into molten metal include a reciprocating rotary lance drive and an associated method. A lance mount which facilitates loading of a lance into a lance drive is also disclosed. Various lance designs are described for improving dispersion of reagent and decreasing process time, including lances having non-circular refractory portions and lances having cross-port arrangements for more evenly distributed reagent discharge.