Abstract: The present invention discloses an arrangement of grooves on the rolls of a rolling mill stand intended particularly for the rolling of beams, rails, channels, squares, diamonds, rounds, tie plates, joint bars and similar shapes wherein a plurality of grooves for shapes with different web heights are nested on the same set of rolls in such a way that the whole of the part of a groove serving as a surround to the shortest web is common to all the nested grooves.

Abstract: The set of horizontal rolls or the set of horizontal and vertical rolls of a universal stand, especially a finishing stand for universal rolling of rails or like sections has, in addition to the finishing grooves, grooves other than universal or finishing grooves, preferably edging grooves.

Abstract: Rolling mill rolls having open grooves comprising active and relatively non-active portions are provided wherein at least two such grooves are overlapped by their relatively non-active portions. Also disclosed are processes for feeding such rolls, a stand connecting such rolls and a universal rolling mill having stands incorporating such rolls.

Abstract: A purifying system is disclosed for the removal of small particles of impurities from a gaseous mixture flowing in a conduit, including a venturi connected in series in the conduit, a liquid injection device for introducing jets of liquid to produce a liquid mist pattern extending transversely within the venturi to moisturize the small particles of impurities, and a regulator operable in response to the pressure differential across the venturi for adjusting the effective cross-section of the venturi and/or the operation of the injection device, thereby to maintain the pressure differential across the venturi at a predetermined value.

Abstract: A process of producing steel ingots having a steel composition at the skin hich differs from that at the heart comprises tapping incompletely killed steel from a tapping ladle into an ingot mould, adding a deoxidizing agent to the steel in the mould, intensively mixing the steel for a period in minutes equal to at least half the height of the ingot in meters and decanting the inclusions in the steel, both the intensive mixing and decant taking place during the basaltic crystallization phase.