Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – Bessemer-type treating vessel
Patent
1984-02-07
1989-04-04
Kastler, S.
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
Bessemer-type treating vessel
266276, C21C 546
Patent
active
048179191
DESCRIPTION:
BRIEF SUMMARY
The present invention refers to a casting device in particular to a converter for pouring and/or treating of molten metal.
Such equipment permit one to tilt the converter into different positions required in the course of a treatment cycle.
Such equipment is used for processes to introduce volatile additives in particular magnesium into an iron-carbon melt, the vaporization thereby being initiated by tilting of converter vessel.
Known is a tilting device for induction furnaces with three tilting axles. The tilting axles are formed by stub pivots which are alternately put into tilt bearings provided for that purpose.
A variety of known tilting devices are hydraulically operated.
These known devices are expensive and complicated in design. Changing from one tilting movement to another moreover, is time consuming and troublesome.
The invention shall propose a device which enables tilting of a vessel or converter into various positions in a mechanically simple way which is economic and makes maintenance easy.
One example of the invention is shown on the drawings and shall be further explained by means of the figures which show:
FIG. 1 A side view with the converter in charging position,
FIG. 2 A side view with the converter in treating position,
FIG. 3 A side view with the converter in discharging position,
FIG. 4 A top view of the equipment, and
FIG. 5 A rear view of the equipment.
FIG. 1 shows a converter 1 in a charging position and which on both sides is fixed via supports 12 (FIG. 5) to the brackets 13 of the guiding segments 14 e.g. by means of screws.
Driving ensues on both sides by drive units 22 and motors 23 which are fixed to a vertically displaceable frame 11, the vertical movement being actuated by mechanisms 25. The device is equipped with wheels 27 for horizontal movement on rails 27a.
A tilting mechanism is provided with at least one tilting arm 5 which--by means of bearing block 8b and bolt 7--forms a stationary tilting axle 6 close to the converter spout 2, (FIG. 4). Tilting arm 5 further includes an additional tilting axle 3 which is spaced from the stationary axle 6. Segment 14 is carried on the bearing block 8a of tilting arm 5 by means of a bolt 4 and is supported via segment bracket 16 on tilting arm 5. Chain 17 is guided along segment 14 and around return pulleys 20 and driver wheel 21. Segment 14 becomes actuated by means of motors 23 and drive blocks 22 which are fixed to the vertically movable frame 11.
Chain 17 is clamped between points 18 and 19. Segment 14 has two different radii, which are determined by the respective tilting axles 3 and 6 to the segment arcs or bows 17a and 17b. This enables one to tilt the converter ladle 1 around its centre of gravity about axle 3 with the small radium according to segment bow 17a (FIG. 2) as well as around its spout (FIG. 3) around axle 6 with the large radius according to segment bow 17b.
Both segments 14 are fixed together by one or several spacers 15.
Converter 1 with its bearings and both its driving units is attached to the U-shaped frame 11.
A treatment cycle runs as follows:
After charging of converter ladle 1 it is tilted into the upright treating position. By selecting the sense of rotation of motors 23 anti-clock wise (FIG. 1) the treating position according to FIG. 2 is reached, the converter thereby tilts around axle 3. After termination of treatment the converter is tilted back into the horizontal position. For this purpose the sense of rotation of motors 23 is switched to clock-wise operation. As soon as the segment brackets 16 touch tilting arm 5--provided that the motor drive is not interrupted--the base plate 10 of tilting arm 5 lifts off from frame 11 starting tilting of the ladle 1 around the axle 6 so as to discharge the treated metal.
Segment 14 can be buckled at point 29 enabling the lowering of converter spout 2 to make direct charging from a furnace possible. This results in lower heat losses due to avoiding the use of the usual transfer ladles.
Segment 14 can be provided with toothing instead of using a chain. Driver
REFERENCES:
patent: 2129050 (1938-09-01), Dumas et al.
patent: 2413231 (1946-12-01), Hoke
patent: 2562441 (1951-07-01), Stroman
patent: 3531074 (1970-09-01), Zelley et al.
patent: 3567205 (1971-03-01), Armour et al.
patent: 3784178 (1974-01-01), Wernli
Stahl and Eisen, 94, No. 14, 7174,"Verwendung von metallischem Magnesium bei der Herstellung von Gusseisen mit Kugelgraphit", p. 647.
Mutschlechner Hermann
Pavlovsky Rudolf
Platzer Herbert
George Fischer Limited
Kastler S.
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