WO1993010413B1 - Melt-in aggregate with furnace cradle - Google Patents

Abstract

A melt-in aggregate has a furnace vessel (11) mounted on a furnace cradle (13) and closable by a lid (12), as well as stick electrodes (28) that can be lifted and lowered into the furnace vessel (119) by means of electrode lifiting means (30). The electrode lifting means (30) are supported on a portal (31). In a lowered position, the portal (31) lies on a support (33) of the substructure (14) of the vessel or cradle (13) and can be tilted in this position together with the furnace vessel (11). It may also be released from the furnace vessel (11) and swivelled aside by means of a lifting jack (43) of a stationary lifting/swivelling mechanism (40). When two vessels are arranged next to each other, the stick electrodes may be alternatively associated to the one or the other vessel by means of the lifting/swivelling mechanism (40).

Claims

AMENDED CLAIMS [received by the International Bureau on 28 May 1993 (28.05.93), replacing original claims 1-10 with amended claims 1-13 (5 pages)] 1. meltdown unit with a furnace cradle (11) mounted on a cradle (13) and closable by a cover (12) and at least one rod electrode (28) which can be lowered into the furnace vessel (11) through an electrode passage opening in the cover (12) which is clamped on an electrode support arm (29) which can be raised and lowered by means of an electrode lifting device (30), in which the electrode lifting device (30) or the electrode lifting devices are or are carried by a gantry (31) which is in a lowered position with the furnace vessel (11) verbun¬ and tilted together with this and by a Hub¬ punch (43) of a stationary lifting / slewing gear (40) in the lowered position of the portal (31) is decoupled from the furnace vessel (11) releasably and is pivotable to the side, characterized in that the portal (31) in the ab¬ lowered position on a support holder (33) of the Gefäßunter¬ construction (14) or the O fenwiege (13). 2. smelting unit according to claim 1, characterized ge ¬ indicates that the portal (31) has a Auflage¬ collar (32) which rests at a distance from a vertical line through the center of gravity of the portal (31) on the side of the support holder (33) and on the opposite side a bearing surface (41) for the lifting ram (43) has auf¬. 3. A smelting unit according to claim 1 or 2, characterized in that there is a frame (37) of the gantry (31) has in the lower region an oven-side support projection (39), which in the lowered position of the porosity 15 Supported on a supporting extension (38) of the vessel substructure (14) and on the opposite side a further supporting projection (45) which in the raised position of the portal (31) on a support extension (44) of the stroke - Stem (43) is supported. 4. smelting unit according to claim 3, characterized g e ¬ k e n e z e i c h e n e that the contact surfaces of Stützsprünge (39) and (45) converge downward. 5. smelting unit with a tiltable melting furnace (10) which is provided with a furnace gas discharge (21) which is connected to a in the vicinity of the melting furnace (10) fixed instal¬ profiled, further disposal system (23) in a connection region (22) , in particular according to one of claims 1 to 4, characterized marked ¬ characterized in that the center of the connecting cross-section (46) is arranged substantially on the Zwi¬ by the contact line between the oven cradle (13) and its rolling plane formed tilting axis (36). 6. smelting unit according to one of claims 1 to 5, characterized in that in addition to the melting furnace (10/1) arranged in a mirror-image arrangement, a second melting furnace (10/2) of the same structure and a common portal (31) by means of the lifting / Swing mechanism (40) either on a support holder (33/1) of the first Schmelz¬ furnace (10/1) and on a support holder (33/2) of the second melting furnace can be brought to rest. 7. smelting unit with a first and a zwei¬ th tiltable melting furnace (10/1, 10/2), each of which with a to a disposal line system (48, 49, 50) ange¬ closed furnace gas discharge (21/1, 21/2 ), with a heating device (28) arranged on a gantry (31), for heating and melting in the first 16 or in the second melting furnace (10/1 or 10/2) charged feedstock, further comprising a first and a second vessel lid (12/1, 12/2) for the first and the second melting furnace (10/1, 10 / 2) characterized in that each vessel lid (12/1, 12/2) together with a shaft (16/1 or 16/2) in a support structure (17/1 or 17/2) is arranged, each shaft (16/1, 16/2) is provided in its upper region with a feed opening (18) and a furnace exhaust gas outlet (21/1, 21/2), which is connected to the Entsorgungsleitungssy¬ system (48, 49, 50), and the two vessel lids (12/1, 12/2) are connected to one another by a cover line (51) for the kiln exhaust gases. 8. smelting unit according to claim 7, characterized ge ¬ indicates that the cover line (51) has two line parts (52/1, 52/2), each with its one end to a vessel lid (12/1 or 12/2) angeschlos¬ sen and with its other end by a conduit middle part (53) are connected. 9. smelting unit according to claim 8, characterized in that the conduit part (53) at both ends by means of connecting sleeves with the line parts (52/1, 52/2) is connected. 10. smelting unit according to one of claims 6 to 9, characterized in that for controlling the gas flow between the two melting furnaces (10/1, 10/2) and of these to the disposal line system (48, 49, 50) Ab¬ locking members (54 /. 1, 54/2, 55) are provided. 11. A method for melting feedstock in ei¬ nem melter according to claim 10 with the following procedural steps 17 Charging feedstock in the first melting furnace (10/1), Controlling the shut-off devices (54/1, 54/2, 55) such that the exhaust gases of the first melting furnace (10/1) are fed via the shaft (16/1) to the disposal line system (48, 49, 50), Heating the feedstock in the first melting furnace (10/1) by means of the heating device (28) and discharging the waste gases through the shaft of this melting furnace (10/1), charging feedstock in the second melting furnace (10/2), Controlling the shut-off devices (54/1, 54/2, 55) in such a way that the exhaust gases from the first melting furnace (10/1) pass through the decoupling line (51) into the second melting furnace (10/2) and over its shaft ( 16/2) and a furnace line (50) of the second melting furnace (10/2) to the central line (48) of the Entsorgungs¬ line system (48, 49, 50) are passed when the melt in the first furnace (10/1) abstich¬ is ready to control the shut-off (54/1, 54/2, 55) such that the exhaust gases of the second furnace (10/2) on des¬ sen shaft (16/2) and the furnace line (50) of the central ¬ line (48) of the disposal line system (48, 49, 50) zu¬ led, Heating the feedstock in the second melting furnace (10/2) by means of the heating device (28) and discharging the Ab¬ gases through the shaft of this furnace (10/2) and Parting off the melt of the first melting furnace (10/1). 12. A method for melting feedstock according to claim 11, characterized in that before charging the first furnace (10/1), the heating device (28) carrying portal (32) by means of a lifting / slewing gear (40) raised and swung away sideways and that the first cover (12/1) is pivoted to the side by means of its holding device (17) and thus releases the first melting furnace (10/1) for filling and that after the first melting furnace has been charged (10 / 1) the holding device 18 tion (17) is moved back to the operating position, in which the first lid (12/1) covers the first melting furnace (10/1). 13. A process for melting feedstock according to claim 12, characterized in that the first melting furnace (10/1) is further filled via its shaft (16/1).