FR2472152A3 - MELTING OVEN FOR NON-FERROUS METALS, WITH BUILT-IN PREHEATING CHAMBER - Google Patents

Abstract

THE INVENTION CONCERNS A FUSION OVEN FOR NON-FERROUS METALS, WITH INCORPORATED PREHEATING CHAMBER. THE PREHEATING CHAMBER 11 IS IN COMMUNICATION WITH THE FUSION CHAMBER 2, OF USUAL TYPE, THROUGH A PASSAGE 10. THE METAL TO BE MELT (IN THE FORM OF INGOTS, FOR EXAMPLE) CAN BE LOADED IN THE PREHEATING CHAMBER 11 , AND TAKES, AFTER PREHEATING, TO GO TO FUSION CHAMBER 2 THROUGH PASSAGE 10.

Description

The present invention relates to a melting furnace

  for non-ferrous metals, with built-in preheating chamber.

  The invention relates to the technical sector of ovens

  with fusion usable in metallurgy.

  The melting furnace for non-ferrous metals, such as alwuinium and its alloys, achieves yields

  higher thermal compared to equivalent melting furnaces

slow traditional.

  According to a first characteristic of the invention, the melting furnace is remarkable in that it comprises in the furnace, a preheating chamber in communication with the

  usual fusion, by means of a passage; this preheating chamber

  fage being designed to allow the metal to be melted therein (ingots for example) and to transport it, once preheated,

  in the melting chamber, through said passage.

  Advantageously, the preheating chamber which is situated either above or next to the melting chamber is established with a loading orifice and with a hopper extending through said orifice, this hopper leading to a advancement or routing device arranged in the preheating chamber and from which the charged metal to be melted is made to progress along said preheating chamber, until it reaches the passage which leads to the fusion. The

  routing device can be a vibrating table, a trans-

  belt or chain carrier, mechanical, manual or

  actuated by pressurized fluid.

  These and other characteristics will emerge from

the rest of the description.

  To properly set the object of the invention, without however limiting it to the figures of the appended drawing o: FIG. 1 is a view in vertical section of the oven according to the invention. Figure 2 is a sectional view along line II-II of

Figure 1.

  In order to make the object of the invention more concrete, it is now described in a nonlimiting manner, with reference to

  to the exemplary embodiments illustrated in the figures of the drawing.

  With reference to FIG. 1, the oven referenced as a whole by (1) comprises, according to traditional techniques, a metallic support structure, coatings and structural elements made of refractory material. In the furnace is provided the melting chamber (2) containing the molten metal bath (3) and comprising at least one housing (4) intended for mounting, according to

  methods known per se, of a usual type of burner. To me-

  tal tal is discharged outside through the orifice (5), by

  example by tilting the oven around an axis designated by (A).

  The melting chamber (2) is partially delimited on one side, above the maximum level that can be reached by the bath (3), by a vertical wall (6) in front of which is provided a conduit (7) closed by a door (8 ). This conduit (7) can allow

  charge metal, for example molten metal.

  According to the invention, in the vault (9) of the melting chamber (2), there is provided a vertical passage (10) located at least partly above the bath (3), and which connects the chamber (2) to

  a preheating chamber (11) delimited at the top by an opening

  refractory structure (12). This cover (12) presents an opening

  and a metal loading hopper (13) extends through

said opening.

  The metal to be melted is fed into the hopper (13) by

  example by means of a grab of any type, not shown.

  the metal thus loaded is deposited on a table (14) which rests on rollers or bars (15) mounted in supports (16)

  partially embedded in the vault (9).

  The table (14) is secured, by its rear part, to an articulation means consisting of one or more levers (17) which are linked to another lever (18) having its fulcrum at (19 ), on a support (20). One end of the lever (18) is subjected to the action of a spring (21), while the other end of the lever (18) is subjected to the action of a cam (22)

  which is rotated by an electric motor (not illus-

  tré), via a belt transmission (23) and

a reducer (24).

  When the engine is running, the rotation of the cam (22) in the direction of the arrow (A), gives the table (14) an oscillating or vibratory movement, which has the effect of moving ingots loaded on said table, along this table and towards the passage (10), where the ingots arrive after

  having left the table and then falling into the bath (3).

  It is easy to see from the above, that the heat emanating from the melting chamber (2) reaches part - 2 - in the preheating chamber (11). This heat preheats the metal which is loaded there, which makes it possible to achieve a

  energy saving and better efficiency of the oven,

  quence. Alternatively, instead of being placed above the room,

  bre melting, the preheating chamber can be located adjacent

  cente to said melting chamber. In this case, a conduit connects

  the two chambers to allow the movement of the pre-

  heated in said conduit, then in the melting chamber. The

  means used to transfer the metal from the pre-chamber

  heating to the melting chamber can be constituted by belt or chain conveyors, pushers actuated either

  mechanically, or manually, from the outside.

  The invention is in no way limited to that of these modes of application, nor to those of the embodiments of these various parts which have been more particularly indicated; she in

  on the contrary embraces all variants.

- 3 -

- 4 - 2 47 2 152

RE VE ND I CAT IO NS

  - 1 - Melting furnace for non-ferrous metals, characterized in that one incorporates

  pore in this oven, a preheating chamber (11) which is in communication with the melting chamber (2) of the usual type, by means of a passage (10), the preheating chamber being established to allow charging therein the metal to be melted (li nots for example) and to transport it, after preheating, in

  the melting chamber, through the said passage.

  - 2 - Melting furnace according to claim 1, characterized in that the preheating chamber (11) is established with a loading orifice and with a

  hopper (13) extending through said orifice to end up with an advancement device

  cement placed in the preheating chamber, the charged metal being caused by this device to progress along said preheating chamber until

  reach the passage (10) giving access to the melting chamber (2) .-

  - 3 - Melting furnace according to claim 2, characterized in that the advancement device comprises a vibration table (14) resting on rollers

  (15) mounted in supports (16) partially embedded in the roof (9).

  - 4 - Melting furnace according to claim 2, characterized in that the device

  advancement includes belt or chain conveyors.

  - 5 - Melting furnace according to claim 2, characterized in that the advancement device comprises pushers actuated manually or mechanically,

from the outside.

  - 6 - Melting furnace according to claim 1, characterized in that the preheating chamber (11) is located above the vault (9) of the melting chamber (2). - 7 - Melting furnace according to claim 1, characterized in that the chamber

  glow plug is adjacent to the melting chamber.