A refractory nozzle is provided for arrangement in or on a wall of a metallurgical crucible, particularly for steel melts, having a discharge duct surrounding a flow passage, wherein the discharge duct has a surface delimiting the flow passage and an outer housing. In order to improve the known solutions of the prior art, one embodiment of the nozzle is characterized by the discharge duct having an upper part and a lower part with the lower part being fixed in or on the upper part, wherein the s...

A method of producing a sintered silicon carbide using a reaction sintering method, comprising: (1) dissolving and dispersing a silicon carbide powder in a solvent to produce a mixed powder slurry, (2) flowing the resulted mixed powder into a mold and drying it to obtain a green body, (3) temporarily sintering the green body in one of a vacuum atmosphere or inert gas atmosphere at 1200 to 1900.degree. C. to obtain a temporarily sintered first body, (4) impregnating the resulted temporarily sinte...

A method of producing a silicon carbide sintered body jig using a reaction sintering method, comprising: (a)dispersing a silicon carbide powder and an organic substance as a carbon source in a solvent, to produce a mixed slurry powder, (b) pouring the resulted slurry powder into a mold and drying this to obtain a green body, (c) temporarily-sintering the resulted green body under a vacuum atmosphere at 1800.degree. C., to obtain a temporarily-sintered body, (d) temporarily-molding said temporari...

The invention relates to a device for actuating a sliding closure (3) applied to a vessel (1) containing a molten metal, once the vessel (1) has been positioned on a ladle rotating tower. A piston/cylinder unit (10) that can be introduced into a holding element (4) of the sliding closure (3) comprises a drive shaft (11) that can be coupled to a slide rod of the sliding closure. Said piston/cylinder unit (10) can be introduced into the holding element (4) and withdrawn from the same by means of a...

A casting tube with a bottom opening for continuously casting steel strands, in particular billets with dimensions of 300 .times. 150 to 500 .times. 300 mm, comprising a converging-diverging end part forming a necking and at least two upwardly inclined lateral outlet openings thus providing for a controlled braking of the flow of steel in the mould. Advantageously, the cross-sectional reduction in the converging part to the necking is 30 to 70 %. The casting tube may be constructed in one piece ...

An apparatus for use during continuous casting for the introduction of a metallic, typically steel melt into the casting head of a continuous casting mold, comprising a substantially tubular-shaped portion which directly merges with a pouring or casting vessel, the cross-sectional area of the tubular-shaped portion being greater than the cross-sectional area of the pouring outlet at the casting vessel. A chamber-like portion of larger cross-sectional area merges with the tubular-shaped portion. ...

A feeder pipe for a mold for continuous casting of steel has near-rectangular inner and outer contour with oppositely directed discharge ports on the small sides of the rectangle feeding towards the small sides of the rectangle of a mold for casting of ingot with rectangular contour.

A method and apparatus for casting of metals into a continuous casting mold wherein metal is cast out of a ladle into a tundish having at least one non-regulatable bottom discharge and into at least one mold by means of a pouring tube. After the start of the casting operation the casting jet emanating from the bottom discharge is controlled and, if desired, corrected to the desired casting jet formation and thereafter the pouring tube is brought into the casting position through the casting jet.

A nozzle consisting of a pouring tube and a return cup extends down into a strand casting mold for pouring molten metal into it. The return cup is suspended in the mold at the lower end of the pouring tube and is submerged below the liquid level in the mold in a position to receive the metal issuing from the pouring tube and redirect it upwardly along the inside wall of the cup. The cup is dimensioned and located so that the eddies that are formed by the countercurrent flow of metal therein will...

The present invention relates to a method for the automated electronic detometric evaluation of separated material mixtures, using carrierless electrophoresis, in which the distribution pattern of the light-absorbing or -reflecting mixture components, for example in the form of an enlarged or reduced optical image, is scanned in accordance with the flying point principle, the scanned points are converted into current pulses and the current pulses belonging to the scanned line are integrated. Thr...