CS253078B1 - Ladle for nodular cast iron production - Google Patents

Abstract

The pan is intended for production, transport and casting ductile cast iron in a single device throughout the working cycle. Pan characterized by a hinged lid or the funnel is rigidly connected to the fixed grip connected rod with suspension device.

Description

The invention relates to a ladle for the production of ductile cast iron.

In prior art ductile cast iron production apparatuses in a modification ladle with a lid, the lid is removed after the liquid metal has reacted with the master alloy. In most cases, due to its weight, an auxiliary mechanization device must be used to remove the lid. The disadvantage of these devices is the necessity of further manipulation of the lid, which leads to increased laboriousness and increased requirements for handling space. Another disadvantage is the rapid drop in the temperature of the liquid metal due to the uncovering of the metal level and time loss.

The drawbacks of the prior art ladles for the production of ductile cast iron are largely overcome by the ladle according to the invention, which is based on the fact that the hinged lid or the ladle funnel is firmly connected to a fixed clamp connected by a drawbar to a suspension device.

Another feature may be that the suspension device or the hinged lid is rigidly connected to the guide grooves in which the pins fixedly connected to the hinged lid or the hinge device are slidably mounted.

An advantage of the solution according to the invention is that no side manipulation of the wolf is eliminated, the movement of the lid being mediated by the handwheel and the worm box for tilting the pan around the horizontal axis. The description of the function implies the possibility of using a ladle for the production of ductile cast iron as well as for transport, treatment and casting of ductile cast iron, while observing all technological requirements. There is no need to handle the lid and no pouring of nodular cast iron into the transport or casting ladle.

An exemplary embodiment of a ladle for the production of ductile cast iron according to the invention is shown in the attached drawing, which represents an axonometric view of the ladle.

As is apparent from the drawing, the rod 1 is provided with a suspension device 2 and a worm gear housing 2 driven by a bold wheel 4; Plastic. je'pevně fuel and connected to the trap 2 · ^K ladle shell 2 is pivotable around a pivot 6. <rigidly connected with the housing pan 2/2 stored hinged lid ^{with a} funnel 2 »formed in the bottom opening 9. The funnel 2 the hinged cover 2 is fixed to with a fixed grip 10 coupled to the hanger: a pull rod device 11; serving to open the hinged lid 1 and secure its position; or hinged víko'2 is rigidly connected to the pins 12 slidably guided in the duplex are situated guide grooves 13 with a stop 14 rigidly connected with the hinge device 2 · ^In another embodiment ^the ladle 2 may be of the guide groove 13 fixedly connected to the hinged lid and the pins T. A bayonet fastening 15 is fastened ^to the shell 2 of the pan 2 3 to enable the hinged lid 2 ^{to be} locked ^{in the} closed position.

Assuming the use of a siphon pan, the device according to the invention is particularly suitable for the single-stage treatment of ductile cast iron where simultaneous inoculation of FeSi and treatment with magnesium are carried out. The equipment is then used for processing, transport and casting of ductile cast iron.

When the ladle 2 is filled with liquid metal, the hinged lid 2 is closed and secured with a bayonet closure 15. For melt treatment, such as slag retraction, the bayonet closure 25 is unlocked and the rod 11 is hooked by a fixed grip 10. 2 / ^{with the} hinged cover T. open. The pan 2 is tilted to the side opposite the outlet opening. After carrying out the technological operation, by turning back the hand wheel 2, the hinged lid T is closed and secured with a bayonet lock 15 and the rod 11 is unhooked from the fixed grip 10, whereby the ladle 2 is ready for casting. When the metal residue is poured out of the ladle 23, the bayonet lock 25 is unlocked. »The rod 11 is hooked by the fixed grip 25. The ladle 2 ^is tilted and the hinged lid T opens automatically. In this semi-axle, the hinged cover T secures against closing by the bayonet closure 15 and the rod 11 is unhooked. Further tilting of the ladle 2 ^to pour the residue metal through the outlet edge of the pan 2 · When heating pan ^2, P ° odjištěpí bayonet lock 15 rotates the pan 2 by means of the handwheel 2 180 and hinged lid ² opens by its own weight to 90 °. In this position, the pan 2 can be placed on an unmarked heating device.

The contents of the melting furnace are poured into the funnel 8 of the hinged lid 11 and through the opening 9 flows into a ladle 2, the bottom of which is adapted to the requirements of the technology. When filling the ladle 2 ^e j metal level in the funnel 2 is maintained at a constant height and the melt is covered by a hinged lid secured 7_ bayonet lock 15. Simultaneously, the reaction proceeds with the molten master alloy. In the reaction, the operator is protected from the effect of the fumes by tightly abutting the abutment surfaces of the top of the pan 2 ^{and the} bottom of the hinged lid 7.

Claims (2)

SUBJECT OF THE INVENTION 1. A ladle for the production of ductile cast iron connected to a suspension device and provided with a siphon and pivotably around a pin fixedly connected to the shell of the ladle by a hinged lid with a funnel provided in the bottom, characterized in that the hinged lid (7) or funnel (8) is rigidly connected to a fixed grip (10) connected by a tie rod (11) to the hitching device (2). Pan for the production of ductile cast iron according to claim 1, characterized in that the suspension device (2) or the hinged lid (7) is rigidly connected to the guide grooves (13) in which the pins (12) are fixedly connected to the hinged with a cover (7) or with a suspension device (2).