Abstract: In a process for reduction of pollutant emissions during thermal processes, particularly sintering processes, in which a combustible mixture, particularly a coke bed, is ignited, the fuel-containing mixture, particularly the coke is rolled with Ca(oH).sub.2 or impregnated with a lime hydrate sludge before feeding the fuel-containing mixture.

Abstract: A procedure for producing coil-forming tubes, in which the tubes are heated to a temperature of 1,000.degree.-1,100.degree. C., particularly to 1,050.degree. C. and then bent at temperatures of more than 850.degree. C. The method proceeds in such a way that the tubes are flushed with N.sub.2 or an N.sub.2 atmosphere is maintained during the heating and during the bending process, in order to increase the service life of such tubes.

Abstract: In a process for continuously melting scrap (6) and/or pig iron within a converter (1), the converter (1) is heated in proximity of the bottom (3) with sub-stoichiometric burners (4), having their flames (5) essentially radially directed into the interior of the converter (1). In this case, secondary air or O.sub.2 is supplied at a distance above the burner plane for the purpose of completing the combustion. The melt is, optionally together with slag, discharged via a tapping means (9) laterally connected to the converter (1) into a mobile ladle (19). For the purpose of interchanging ladles (19), the converter (1) is swivelled into a position in which the level of the melt is located below the taphole (11).

Abstract: An apparatus for heating steel melts covered with a slag rich in iron oxide, and employed in particular for continuous steel making processes such as the KVA process, incorporates a height-adjustable injection lance for supplying metals which react exothermally with the melt and with the oxygen in the slag. The nozzle of the injection lance is adjustably arranged above the contents of the ladle so that it can be maintained in the zone of the melt/slag phase boundary.

Abstract: In a process for heating within a ladle (5) steel melts (10) being covered with a slag (8) rich in iron oxides, in particular for continuous steel production processes such as, for example, the KVA-process, thereby using metallothermal heat, there is (are) during filling the ladle (5), insufflated by an inert gas via nozzles (14) provided in the bottom (12) of the receiving ladle (5) for the mixture of bath and slag a metal, such as, for example, Al, Si, their mixtures or alloys, in particular FeSi, exothermically reacting with the oxygen of the bath and with the oxygen of the slag as well as, optionally, pulverulent slag formers, such as, for example, CaO, Al.sub.2 O.sub.3, MgO and/or SiO.sub.2.

Abstract: In a process for utiliting zinc-containing metallurgical dusts and sludges, the zinc-containing dusts and sludges are agglomerated, briquetted in a cold manner or pelletized and are added to the charge of a melting furnace for melting metal from metallized charges such as, scrap iron or pig iron. For this purpose, there are in particular used agglomerates or pellets having a metallizing degree of at least 30 percent by weight, preferably of at least 40 percent by weight.

Abstract: For the purpose of melting scrap iron, pelletized sponge iron in reduced condition, solid pig iron or the like, there is introduced into the melting heat from below a charge-accepting receptacle by means of burners the carbon content within the molten bath is adjusted by a sub-stoichiometric combustion of hydrocarbon. Addition of any coal to the charged material is avoided. By reducing the oxygen flow, in particular by performing the combustion with approximately 0.9-times of the stoichiometric amount of oxygen, and by optionally adding slag formers, the aggressivity of the slag in relation to the furance lining is simultaneously reduced.

Abstract: In a process for continuously melting scrap (6) and/or pig iron within a converter (1), the converter (1) is heated in proximity of the bottom (3) with sub-stoichiometric burners (4), having their flames (5) essentially radially directed into the interior of the converter (1). In this case, secondary air or O.sub.2 is supplied at a distance above the burner plane for the purpose of completing the combustion. The melt is, optionally together with slag, discharged via a tapping means (9) laterally connected to the converter (1) into a mobile ladle (19). For the purpose of interchanging ladles (19), the converter (1) is swivelled into a position in which the level of the melt is located below the taphole (11).