Patent US4302245A successfully refreshed from Google Patents.
US4302245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for recovering zinc and zinc alloys from automobile scrap
Assignee: Rexam Beverage Can Co
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Filing: 1980-06-20
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Granted: 1981-11-24
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Expires: 2000-06-20
Abstract
Abstract An improved method and apparatus for separating and recovering zinc and zinc alloy particles which are nickel plated from non-ferrous non-magnetic automotive scrap material. The scrap material is transported on a belt conveyor past a magnetic field where the path of the zinc particles with nickel are deflected into a path separated from the remaining scrap material. Subsequently the zinc and zinc alloy materials are recovered by a pyrometallurgical process.
Inventors
- 👤 Frederic T. Winters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:05
CPC Classifications
C; C22; C22B; C22B7/00; C22B7/005; B; B03; B03C; B03C1/00; B03C1/02; B03C1/16; B03C1/22; C22B19/00; C22B19/30; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A method of separating and removing zinc particles coated with a relatively thin layer of magnetic material from a heterogeneous scrap mixture thereof with particles of non-magnetic materials, comprising the steps of: supplying a heterogeneous mixture including said zinc particles coated with magnetic material, and said particles of non-magnetic materials onto a moving conveyor; exposing said scrap mixture on said moving conveyor to a magnetic field of strength sufficient to separate the moving zinc particles coated with magnetic material from the moving particles of non-magnetic materials; and removing the separated zinc particles into a collection zone separate from the remaining particles of non-magnetic materials of said mixture.
Claim 2
Independent Claim
107 words
A method of separating and removing zinc particles coated with a relatively thin layer of magnetic material from a heterogeneous scrap mixture thereof with particles of non-magnetic materials, comprising the steps of: supplying a heterogeneous mixture including said zinc particles coated with magnetic material, and said particles of non-magnetic materials onto a moving conveyor; exposing said scrap mixture on said moving conveyor to a magnetic field of strength sufficient to separate the moving zinc particles coated with magnetic material from the moving particles of non-magnetic materials; and removing the separated zinc particles into a collection zone separate from the remaining particles of non-magnetic materials of said mixture.
Claim 3
Dependent Claim
17 words
A method according to claim 1 wherein said magnetic material is nickel plating on said zinc particles.
Claim 4
Dependent Claim
24 words
A method according to claim 2, wherein the particles of non-magnetic materials include any of aluminum, lead, brass, stainless steel, cooper or combinations thereof.
Claim 5
Dependent Claim
18 words
A method according to claim 1 wherein the strength of the magnetic field is at least 1500 Gauss.
Claim 6
Independent Claim
87 words
A method of separating and removing zinc particles, having on at least portions thereof relatively thin coatings of nickel, from a mixture of said zinc particles with particles of non-magnetic materials, comprising the steps of: placing a mono-layer of such a mixture on a moving conveyor; subjecting said mixture on said conveyor to a magnetic field of strength sufficient magnetically to attract said zinc particles and separate the latter from the particles of non-magnetic materials; and directing said magnetically attracted, separated zinc particles into a collection zone.
Claim 7
Independent Claim
87 words
A method of separating and removing zinc particles, having on at least portions thereof relatively thin coatings of nickel, from a mixture of said zinc particles with particles of non-magnetic materials, comprising the steps of: placing a mono-layer of such a mixture on a moving conveyor; subjecting said mixture on said conveyor to a magnetic field of strength sufficient magnetically to attract said zinc particles and separate the latter from the particles of non-magnetic materials; and directing said magnetically attracted, separated zinc particles into a collection zone.
Claim 8
Dependent Claim
22 words
A method according to claim 5, wherein said non-magnetic materials include any of alluminum, lead, brass, stainless steel, copper, or combinations thereof.
Claim 9
Independent Claim
119 words
A method for separating and removing zinc particles having a relatively thin nickel coating thereon from a heterogeneous scrap mixture thereof with particles of non-magnetic material, comprising the steps of: supplying a heterogeneous scrap mixture of particles smaller than 3/4 inch size, including said non-magnetic particles and said zinc particles having relatively thin nickel coatings; evenly distributing a mono-layer of scrap mixture of particles onto a conveyor belt for transport of said mixture along a predetermined path; subjecting said scrap mixture, as it is moved along said predetermined path, to a magnetic field of strength sufficient magnetically to separate the moving zinc particles coated with nickel from the non-magnetic particles; and collecting said zinc particles as they are separated.
Claim 10
Independent Claim
119 words
A method for separating and removing zinc particles having a relatively thin nickel coating thereon from a heterogeneous scrap mixture thereof with particles of non-magnetic material, comprising the steps of: supplying a heterogeneous scrap mixture of particles smaller than 3/4 inch size, including said non-magnetic particles and said zinc particles having relatively thin nickel coatings; evenly distributing a mono-layer of scrap mixture of particles onto a conveyor belt for transport of said mixture along a predetermined path; subjecting said scrap mixture, as it is moved along said predetermined path, to a magnetic field of strength sufficient magnetically to separate the moving zinc particles coated with nickel from the non-magnetic particles; and collecting said zinc particles as they are separated.
References Cited (Backward Citations)
US4227922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-23 | 1985-05-25 | 1985-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-23 | 1989-05-25 | 1989-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-23 | 1993-05-25 | 1993-11-24 | $7700.00 | Window Closed / Lapsed |