the practice of this invention for ejection from a nozzle one can name air oxygen oxygen enriched air nitrogen argon carbon dioxide hydrogen helium gaseous hydrocarbons other gaseous fuels and mixtures comprising one or more thereof as illustrated in fig1 and 2 the nozzles are oriented in the lance end with their axes or centerlines at an inward angle a to the axis or centerline of the lance angle a may be up to 45 degrees or more and preferably is in the range of from 0 5 to 5 degrees most preferably within the range of from 0 5 to 2 degrees preferably the throat diameter of the nozzles is within the range of from 0 2 to 2 0 inches and the diameter of output openings 5 is within the range of from 0 3 to 3 0 inches gas is ejected out from each of the nozzle output openings 5 preferably at a supersonic velocity and generally within the range of from 500 to 10 000 feet per second fps to form a plurality of gas jets 20 the lance end also has at least one ejection means preferably an annular ejection means for passing at least one gas stream out from the nozzle preferably concentrically around the plurality of gas jets the gas stream or streams passed out from the ejection means can be in any.