Dross removal on coating lines
AssigneeInductotherm Corp.
InventorsHans G. Heine, Oleg S. Fishman
Life of this patent
Estimating the term…
Abstract
The invention presents an apparatus and method for dross removal from coating lines. The invention utilizes magnets to collect dross either in suspension or which has accumulated at or near the bottom of a coating pot. The invention utilizes the magnetic properties of the dross to separate the dross from the non-magnetic coating metal. The use of magnets allows for removal of dross from the coating metal without simultaneously removing valuable coating metal from the coating pot.
Claims14
A dross removal system for removing dross from a coating line comprising:
- a coating pot for holding molten metal, and having a bottom portion at or near which dross may accumulate;
- an intake at or near the bottom portion of the pot extending from within the pot to outside the pot;
- a pump coupled to the intake for pumping a molten metal-dross combination from the pot;
- a receiving area for receiving the molten metal-dross combination pumped from the pot;
- at least one magnet associated with and in close proximity to the receiving area, the magnet attracting the dross from the molten metal-dross combination for removal therefrom.
A dross removal system for coating lines comprising:
- a coating pot maintaining a molten metal wherein dross accumulates at or near a bottom portion of the pot;
- a tube submerged into the molten metal;
- a series of coils sequentially wound about the tube;
- a power supply circuit for applying a sequential dc current to each of the said series of coils;
- and
- an electromagnet located at the end of the tube at an upper portion of the coating pot, whereby the application of said sequential dc current creates a slow travelling wave inside the tube to attract and convey the dross up the tube and out of the pot for collection on the electromagnet.
A dross removal system for coating lines comprising:
- a coating pot maintaining a molten metal wherein dross accumulates at or near a bottom portion of the pot;
- a conveyor belt having a first end positioned at or near the bottom portion of the pot and a second end positioned above the molten metal;
- and
- a magnetic plate positioned on an interior side of the conveyor belt for attracting the dross, wherein the conveyor belt is adapted to travel across the magnetic plate from the bottom portion of the pot to above the molten metal and thereby carry the attracted dross out of the molten metal.
A method for removing dross from coating lines having a coating pot holding a molten metal and accumulated dross at or near a bottom portion of the coating pot comprising the steps of:
- pumping a molten metal-dross combination from the coating pot;
- transporting the removed molten metal-dross combination to a receiving area, the receiving area including at least one magnet associated with and in close proximity thereto;
- magnetically attracting the dross from the molten metal-dross combination using the at least one magnet;
- and
- returning the molten metal which remains after the dross has been removed to the coating pot.
A method for removing dross from coating lines having a coating pot holding a molten metal and accumulated at or near a bottom portion of the coating pot, comprising the steps of:
- attracting the dross using a magnetic field inducing element and;
- conveying attracted dross from the bottom portion of the coating pot up and out of the molten metal.
Dependencies are inferred from the claim text.