Device for transferring pulverulent materials, and application to the feeding of a molten metal with pulverulent material

• US 20020172566A1
• Filed: 06/27/2002
• Published: 11/21/2002
• Est. Priority Date: 11/03/2000
• Status: Active Grant

• Current Assignee: Sotic Mecanique
• Original Assignee: Sotic Mecanique
• Inventors: Issler, Thomas
• Granted Patent: US 6,632,049 B2
• Time in Patent Office: Days
• US Class Current: 406/153
• CPC Class Codes: B65G 53/28 Systems utilising a combination of gas pressure and suction inducing feed of the materials by suction in gas pressure systems B65G53/14
• CPC Class Codes: B65G 53/42 Nozzles
• CPC Class Codes: B65G 53/58 Devices for accelerating or decelerating flow of the materials; Use of pressure generators controlling pressure of propelling gas B65G53/66

Abstract

A device for transferring pulverulent material, for example, powdery material, including an enclosure (3) wherein the pulverulent material to be transferred is stirred and pressurized; a first pipe (8) and a second pipe (9) which transport the material towards its destination; and a gas intake (14, 15) for introducing gas to the second pipe (9). In one aspect of the invention, pipe (8) forms a nozzle (12), oriented in the direction of the material flow and directed toward second pipe (9). The gas intake (14,15) may emerge at the lower end of the first pipe (8), outside the nozzle (12), wherein the gas is introduced into the second pipe (9) through a plurality of through orifices (20) oriented substantially parallel to the flow direction of the pulverulent material.

Claims

1. A device for transferring pulverulent materials, comprising:

an enclosure (3) in which the pulverulent material to be transferred is stirred and pressurized, at the lower end (7) of which enclosure a pipe (8) conveys said material toward its place of destination;

a gas inlet (14, 15), and in particular a compressed air inlet, emerging in the pipe (8), and the inflow being able to ensure the progress of the material toward said place;

characterized in that at the level of the gas inlet (14, 15), said pipe (8) forms a nozzle (12), pointing in the direction of the flow of the material, said nozzle emerging into a second pipe (9), of substantially the same diameter as the first, and in that the gas inlet (14, 15) emerges at the lower end of the first pipe, outside the nozzle (12), said gas being introduced into the second pipe (9) by means of a plurality of through-orifices (20) made substantially in the same plane as the lower end (13) of the nozzle (12) and oriented substantially parallel to the direction of flow of the pulverulent material.

2. The device for transferring pulverulent materials as claimed in claim 1, characterized in that it comprises two gas inlets (14, 15), distributed in a diametral manner with respect to the pipe (8).

3. The device for transferring pulverulent materials as claimed in either of claims 1 and 2, characterized in that the two pipes (8, 9) are secured to one another by means of rings (10, 22).

4. The device for transferring pulverulent materials as claimed in claim 3, characterized in that the ring (10) is furnished with two lateral orifices, diametrally distributed with respect to its generatrix, at the level of which orifices the gas inlets (14, 15) culminate.

5. The device for transferring pulverulent materials as claimed in either of claims 3 and 4, characterized in that the ring (10) comprises a partition (19), oriented perpendicularly with respect to the direction of flow of the pulverulent materials, and drilled on the one hand with a central orifice (23), so as to allow the introduction at this level of the lower end (13) of the nozzle (12) and on the other hand, with through-orifices (20), peripheral with respect to the central orifice (23), and oriented parallel to said direction of flow, and intended to allow the passage of the pressurized gas toward the pipe (9).

6. The device for transferring pulverulent materials as claimed in one of claims 1 to 5, characterized in that it comprises, between the lower end (7) of the enclosure (3) and the ring (10), a cellular feeder (6), intended to deliver calibrated and defined quantities of said materials.

7. The device for transferring pulverulent materials as claimed in one of claims 1 to 6, characterized in that it is managed by a programmable controller.

8. A device for feeding powder under pressure to a bath of molten metal, comprising:

an enclosure (3) in which the powder is stirred and pressurized, at the lower end (7) of which enclosure a pipe (8) conveys the powder toward the bath of molten metal;

an inert gas inlet, emerging in the pipe (8), and the inflow being able to ensure the progress of the powder toward said bath;

characterized in that at the level of the inert gas inlet, said pipe (8) forms a nozzle (12) pointing in the direction of the flow of the powder, said nozzle (12) emerging into a second pipe (9), of substantially the same diameter as the first, and in that the inert gas inlet (14, 15) emerges at the lower end of the first pipe (8) outside the nozzle (12), said gas being introduced into the second pipe (9) by means of a plurality of through-orifices (20) made substantially in the same plane as the lower end (13) of the nozzle (12) and oriented substantially parallel to the direction of flow of the powder.

9. The device for feeding powder under pressure to a bath of molten metal as claimed in claim 8, characterized in that it comprises two gas inlets (14, 15), distributed in a diametral manner with respect to the pipe.

10. The device for feeding powder under pressure to a bath of molten metal as claimed in either of claims 8 and 9, characterized in that the two pipes (8, 9) are secured to one another by means of rings (10, 22).

11. The device for feeding powder under pressure to a bath of molten metal as claimed in claim 10, characterized in that the ring (10) is furnished with two lateral orifices, diametrally distributed with respect to its generatrix, at which orifices the inert gas inlets (14, 15) terminate.

12. The device for feeding powder under pressure to a bath of molten metal as claimed in either of claims 10 and 11, characterized in that the ring (10) comprises a partition (19), oriented perpendicularly with respect to the direction of flow of the powder, and drilled on the one hand with a central orifice (23), so as to allow the introduction at this level of the lower end (13) of the nozzle (12) and on the other hand, with through-orifices (20), peripheral with respect to the central orifice (23), and oriented parallel to said direction of flow, and intended to allow the passage of the pressurized gas toward the pipe (9).

13. The device for feeding powder under pressure to a bath of molten metal as claimed in one of claims 8 to 12, characterized in that it is more especially intended for aluminum foundries.

14. The device for feeding powder under pressure to a bath of molten metal as claimed in one of claims 8 to 13, characterized in that it comprises, between the lower end (7) of the enclosure (3) and the ring (10), a cellular feeder (6), intended to deliver calibrated and defined quantities of powder at the level of the bath of molten metal.

15. The device for feeding powder under pressure to a bath of molten metal as claimed in one of claims 8 to 14, characterized in that it is managed by a programmable controller.