Abstract: The invention relates to a metallurgical furnace, comprising a furnace body (1), a trunnion ring (2), and a pedestal structure (3). The furnace body (1) is arranged in the trunnion ring (2) rotatably about a rotation axis (A) by means of a supporting arrangement (4) comprising a bearing arrangement (5) between the trunnion ring (2) and the furnace body (1). The supporting arrangement (4) comprises a first connection frame means (7) between the furnace body (1) and the bearing arrangement (5), and a second connection frame means (8) between the bearing arrangement (5) and the trunnion ring (2). The second connection frame means (8) is connected to the trunnion ring (2) by a first attachment (9) providing for movements between the second connection frame means (8) and the trunnion ring (2).

Abstract: In a method for operating a converter (1), in which the converter (1) is mounted in a carrying ring (3) by means of carrying journals (2), a gear mechanism (4) is mounted in a floating manner on the carrying journals (2), the converter (1) is configured, as a result, such that it can tilt about its horizontal axis and the gear mechanism (4) is connected rigidly to a pedestal (6) by a torque support (5), the torque support (5) connects the gear mechanism (4) to the pedestal (6) during the tilting operation of the converter (1), and the torque support (5) is released from the pedestal (6) or from the gear mechanism (4) or from both during operation of the converter (1).

Abstract: An apparatus for producing steels with predominantly high Cr content and/or ferro-alloys, wherein the metal charge is melted in a melting crucible, is alloyed, refined and reduced, and wherein process gases are simultaneously supplied through bottom nozzles. A melting crucible is used with a specific reaction volume of 0.4 to 1.5 m3/t steel and the injection rates of the process gases are controlled in the range of 0.1 to 3.0 N m3/t/min. The solid charge material is melted by an electric arc and air/nitrogen are injected simultaneously and, after forming a liquid sump, a gas mixture of oxygen and inert gas is injected. After adding slag-forming constituents and alloying agents, the oxygen throughput is increased and the power of the electric arc is reduced accordingly. The oxygen throughput is reduced in relation to the inert gas during refining and decarburization takes place as a result of increasing the electric arc with low chromium slag formation.

Abstract: A support device (1) for foundry ladles (13, 14) for a continuous casting plant has a stationary fixed base and a rotary base (4) mounted rotatably with respect to the fixed base and rotatable by means of a rotary drive, on which rotary base at least one support arm system (11, 12) for receiving a foundry ladle (13, 14) is articulated by a parallelogram linkage system (15) with arms (17 to 20) pivotable about horizontal bearing axes (24, 25), with support arm system (11, 12) viewed in outline having a rigid U-shaped support part (26) surrounding a foundry ladle (13, 14) on which part (26) foundry ladle (13, 14) is supportable and can be raised and lowered by at least one pressurized cylinder (16) with respect to rotary base (4).

Abstract: A torque support for drives riding on trunnions, in particular for converter tilt drives, including a gear housing mounted on the trunnion which is rotatable about an axis of rotation, a drive motor attached by a flange or bolting to a step-down gearing which engages, via pinion, with a larger gear wheel fixed for rotation on the trunnion. The torque support includes a pair of guide rods located symmetrically to the axis of rotation of the trunnion, each guide rod includes a first and second oppositely positioned part, the first and second rod part have an upper and lower end and a respective free end opposite thereto; the upper ends are pivotally mounted on the gear housing and the lower ends are connected to each other via either a compression-tension bar or torsion shaft, upon which the lower ends are pivotally mounted.

Abstract: A metallurgical vessel is usually mounted in a annulus or the like by means of which the vessel can be tilted; however occasionally the vessel has to be removed from the annulus; accordingly a plurality of tension means are articulated by means of spherical bearings to the upper side of the annulus being comprised of a plurality of wires in the upper part with a hinge element and a tension head in the lower part; claw elements are affixed to the vessel and have lateral openings through which the tension head can be laterally inserted due to the articulation and/or the hinging; the head will lodge behind the claw element and can be tightened by means of a tension nut.

Abstract: A tilt mount for a metallurgical vessel having a carrier ring with tilt pins mounted and journaled in stationary bearings for tilting the vessel about a horizontal axis; there being means effective in the direction of a longitudinal axis of the vessel for mounting the vessel in the carrier ring, further comprising, a pair of oppositely positioned hollow bearings, means for mounting each of these bearings to the carrier ring in a locations opposite each other, including a pair of tension elements carrying respectively, on one end, the respective bearing and being with the respective other ends connected to the carrier ring.

Abstract: A structure of the oxygen passage in a steel converter supporting trunnion comprises a hollow chamber provided where a trunnion shaft projects from a trunnion ring. In the hollow chamber is inserted a hermetic manifold, to which a horizontal pipe communicating with a rotary joint and a vertical pipe communicating with an oxygen tuyere in the bottom of the converter vessel are welded. Inside the manifold, there is fitted a communicating member containing a bend-like passage through which the horizontal and vertical pipes communicate with each other.

Abstract: A metallurgical vessel has upper and lower brackets which engage a trunnion ring for support along inclined surfaces whose total vertical angle has a tangent equal to the growth of the vessel radially in the region of its said brackets to the elongation of that portion of the vessel between the brackets.

Abstract: A tiltable-converter supporting mechanism with drawing hooks which engage with bearing bushing bolting pieces and are actuated by pressure medium cylinder means has self-locking bracing means holding the engaging drawing hooks in a locked position.