Abstract: An alloy of Al and two or more of Ca, Mg and REM is added as a deoxidizing agent to molten steel, and the amount of Al.sub.2 O.sub.3 in the resulting inclusion is adjusted to a range of 30-85 wt % to obtain an alumina cluster-free Al-killed steel.

Abstract: Adding aluminum and/or silica to molten steel after decarburization containing about 0.005 percent by weight or less of carbon and about 1.0 percent by weight or less of manganese to form a mildly deoxidized molten steel; adding titanium to the mildly deoxidized molten steel to continue deoxidation so that the molten steel contains about 0.005 percent by weight or less of aluminum, about 0.20 percent by weight or less of silicon and about 0.01 to 0.10 percent by weight of titanium, to form inclusions in the molten steel which essentially consist of a complex oxide of titanium and aluminum, a complex oxide of titanium and silicon, and/or a complex oxide of titanium, aluminum and silicon.

Abstract: In an immersion nozzle for continuous casting, at least one portion of reduced a sectional area of passage for molten metal is formed near to the bottom of the nozzle and plural discharge ports symmetrically arranged with respect to the axis of the nozzle are arranged above and below the reduced sectional area portion in the longitudinal direction of the nozzle. Further, molten metal is continuously cast by using the above immersion nozzle together with a static magnetic field.

Abstract: A method and apparatus for continuous casting of an elongated thin metal strip achieves substantially high yield without allowing break-out or sticking. The method for casting a continuous elongated metal strip includes a step of driving endless belts at a varying speed so as to apply jerks to the slightly and half-solidified metal that release the metal from the surfaces of the stationary side walls. Applying jerks to the casting chamber by varying the driving speed of the endless belt ensures that the solidifying metal will travel smoothly and thus ensures a high manufacturing yield.

Abstract: A mold additive for use in continuous casting, which includes a base material having a chemical composition of CaO--BaO--SiO.sub.2 --F system, and contains 2-15% by weight in total of at least one carbonate of alkali and alkaline earth metals, 2-30% by weight in total of at least one fluoride of alkali and alkaline earth metals and 0.2-10% by weight of carbon, and, if necessary, 2-10% by weight in total of at least one oxide of Fe, Mn and Ni, and has a solidification temperature of not more than 900.degree. C. and a viscosity at 1,300.degree. C. of not more than 3 poises. The base material has a weight ratio of (CaO+BaO)/SiO.sub.2 of 0.6-2.5 and contains not less than 2% by weight of BaO and 2-15% by weight of F.

Abstract: A method and apparatus for continuous casting of an elongated thin metal strip achieves substantially high yield without allowing break-out or sticking. The method for casting a continuous elongated metal strip includes a step of driving endless belts at a varying speed so as to apply jerks to the slightly and half-solidified metal that release the metal from the surfaces of the stationary side walls. Applying jerks to the casting chamber by varying the driving speed of the endless belt ensures that the solidifying metal will travel smoothly and thus ensures a high manufacturing yield.

Abstract: A belt-converging type continuous casting apparatus for the continuous production of sheet bar-like cast sheet, wherein a casting space is defined by a combination of a pair of metal belts for supporting broad side planes of the cast sheet arranged opposite to each other with circulatedly moving, and a pair of tapered fixed-type side plates for supporting narrow-side planes of the cast sheet each disposed between the metal belts in intimate contact therewith, and is characterized in that the shape of the side plate is designed so as to satisfy the following relations:d=5-300 mm,D.gtoreq.60 mm,D/d.ltoreq.16,.theta..ltoreq.30.degree..theta.=tan.sup.-1 (D-d/Hto thereby prevent the occurrence of defects in the side planes of the cast sheet, while the metal belt is selected so as to satisfy the following relations:Sy.gtoreq.10,500 t/Dr,0.4.ltoreq.t.ltoreq.2.

Abstract: A cooling pad for use in a continuous casting apparatus for the production of cast sheets. The pad is provided with plural water supply and discharge holes satisfying the particular relations on the arrangement thereof. By using such a cooling pad, a filmy cooling water flow is uniformly and stably formed in the casting.

Abstract: A mold additive for use in the continuous casting is disclosed, which comprises a base material for slag having a chemical composition of CaO--SiO.sub.2 --Al.sub.2 O.sub.3 system, a flux and a carbonaceous aggregate. The mold additive contains 0.5-2.0% by weight of carbon black and 1-4% by weight of activated carbon with an average particle size of not more than 10 .mu.m as the carbonaceous aggregate, and has a bulk density of not more than 0.9 g/cm.sup.3.