Aga Aktiebolag

Avesta Sheffield Aktiebolag

Lars Folke Saltin

Sten-ANGke Brannvall

Sven-Eric Lunner

Carl-Lennart Axelsson

Method for heat treatment of steel, and products of steel

Destruction and re-use of mineral wool scrap

A method for reducing the flame temperature of an oxy-fuel burner, such a burner comprising a central oxygen nozzle at least one fuel nozzle radially spaced from the central oxygen nozzle, and at least one peripheral oxygen nozzle at greater radial distance from the central oxygen nozzle than the fuel nozzle, all nozzles being at least substantially parallel, a casing surrounding the nozzles and whose forward end lies in a plane at right angles to the longitudinal axis of the burner, and whose rear portion defines an oxygen chamber, and means for the supply of oxygen-containing gas and fuel, respectively, to the nozzles. The peripheral oxygen nozzle is in the form of a Laval nozzle or, if it is an annular nozzle, is of the same cross-sectional variation as the Laval nozzle throughout its entire length. The major fraction of the volume of oxygen requisite for combustion is caused to pass at great speed through at least one oxygen nozzle disposed about the burner nozzle and thereby aspirate ambient atmosphere which is at a lower temperature than the flame, before the oxygen from the oxygen nozzle reacts in the flame.

Growing community of inventors

Vaster.ang.s, Sweden

Lars Folke Saltin