Abstract: The present invention relates to a procedure and an arrangement for spreading pulverized or granular additive material, preferably covering material, on the surface of a metal melt, preferably a steel melt, which is in an open metallurgical ladle by means of a spreading arrangement whereby at least a predetermined quantity of additive is made available in a dosing container whereby the dose is sub-divided into partial doses, the ladle is placed underneath the dosing container, the additive dose is made to fall under its own weight onto the surface of the metal melt and is spread out on the surface by means of a spreader which is connected to the dosing container.The arrangement for performing the procedure comprises a spreader (b 1) which consists of two or more concentrically-arranged truncated tubular cones (2), a dosing container (3), two valves (8), (9) for filling and emptying respectively the container (3).

Abstract: A method for refining of steel melts for production of steel, especially stainless steel, with extremely low oxygen content is characterized in that a powdered non-oxidic earth alkali metal compound or alloy is injected by means of a non-oxidizing carrier gas, preferably an inert gas, into a well de-oxidized steel melt which is covered by a basic reduced slag in a metallurgical ladle, whereby at least a significant amount of the earth alkali metal is oxidized by the oxygen dissolved in the melt to form small particles of earth alkali metal oxide, of which some are separated out to the slag cover while the remaining portion of the earth alkali metals stays behind in the melt in elementary form or combined in the form of particulate earth alkali metal oxide in colloidal solution, and that then powdered earth alkali metal oxide is injected, whereby there latter, larger oxide particles function as nucleus forming agents for the continued reaction between earth alkali metals dissolved in the melt and oxygen, and a

Abstract: The invention relates to a method and equipment of producing with good reproducibility steel which is extremely free from slag inclusions, particularly steel with low sulphur content and thus very low contents of sulphidic slag inclusions, starting with a steel melt which is decarburized in a melting furnace, converter or the like to the desired carbon content, after which subsequent refining is carried out by an injection method in a ladle.

Abstract: Apparatus is disclosed for the testing and fitting of cross-country skis including means to support the cross-country ski having sensor means distributed along its length and width adapted to emit a signal when the bottom surface of the cross-country ski presses them, display means adapted to indicate the origin of the signals from the sensor means and adjustable loading means to exert predetermined forces to points along the top surface of the ski and load measuring means adapted to indicate the applied load.

Abstract: In an injection-metallurgical process performed in a ladle, lime is injected during a first phase after the deoxidation, removing the main part of the sulphur existing in the melt. During a second phase thereafter calcium-silicon, calcium-carbide or calcium-cyanamide is injected, which has a devised impact upon the morphology of the remaining inclusions. At the same time the flowability of the steel is improved, which is particularly important in the production of deep-drawing steels.

Abstract: In batteries of tubes conducting a heating fluid air is led through the spaces between the tubes, to be heated for use in grain drying installations or the like. Airborne dust and impurities form deposits on the tubes and impair heat transmission. The deposits are removed from the tubes by increasing at intervals the air velocity by means of a grid structure defining passages having a reduced flow area and placed in front of the interspaces between the tubes.

Abstract: Lead alloy steels, containing 0.15-0.35% of lead in the form of inclusions of average diameter less than 100 .mu.m evenly distributed over a cross-sectional area, and without a tendency to macrosegregation of lead, are prepared by injecting into a steel melt lead containing particles of diameter less than 5 mm in an inert carrier gas which is injected at a rate sufficient to stir the melt and distribute the lead uniformly.

Abstract: A method for the alloying of a metal melt with an alloying material by pneumatic injection of such element through a lance which is submerged in the melt. The alloying material may be lead or metals and compounds having physical properties similar to lead.