摘要:
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.2.5,wherein Dr is a diameter of a guide roll (mm), to thereby prevent the deterioration of cast sheet quality and the casting accident accompanied with the deformation of the belt.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
A belt type cast sheet continuous caster of the type comprises a pair of opposed circulatorily movable belts, a pair of opposed side plates arranged along opposite side edge portions of the movable belts, coolers which each have numerous water feed openings and water discharge openings opened to the movable belt and are arranged behind the respective movable belts, and movable partition plates which are placed in respective cooling headers and each connected to driving means for moving the partition plates in a width direction of a cast sheet. A casting space is defined by the movable belt and the side plates. Melt leakage at sliding portions between mold short side plates and the metal belts in a belt type cast sheet continuous caster comprising the metal belts and the mold short side plates arranged along side edge portions of the metal belts and cooleres, which each have numerous water fed openings and water discharge openings opened to the metal belt and are arranged behind the respective metal belts, is prevented by controlling gaps between the metal belts and the mold short side plates through varying a pushing force of the metal belts to the mold short side plates.
摘要:
A continuous casting apparatus for the production of cast sheets having a casting space defined by a pair of opposed endless belts and a pair of side plates arranged near the side edge portions of the belts while being brought into intimate contact therewith and designed to be converged toward a drawing direction. In this apparatus, a filmy water flow-forming pad arranged behind each of the belts, and each of the side plates are so profiled that the casting space inclusive of the tapered portion depicts a smooth curve at at least a transition area from the taper end portion to a constant thickness portion.
摘要:
In the top-and-bottom blown converter steel making process, a process is provided wherein the position of the bottom-blowing tuyeres is set such that the maximum X.sub.0 among the distances X between the respective tuyreres and the center of the converter bottom is up to 1.3 times the horizontal distance Y between the central vertical axis of the converter and the outermost boundary of a hot spot region developed on the molten iron surface by the top-blowing oxidizing gas from the lance. By setting the position of the bottom blowing tuyeres in this manner, the interference of the bottom-blowing gas with the top-blowing gas is promoted to enhance the agitation between the slag and the metal to reduce the concentration of iron value (T.Fe) in the slag, thereby improving the iron yield.
摘要:
A high-performance hermetic type compressor in which the influence of a cylinder bore deformation caused during assembly is reduced and the sealing tightness between a piston and a cylinder block is improved. A bore hole in the cylinder block has a hollow portion. Depth H1 of the hollow portion is larger than thickness H2 of compression space V at the moment when the pressure in the compression space V reaches the discharge pressure level Pd.