# US 5,269,424 A · Mobile separation method system for abrasive blasting material

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- Number: US 5,269,424 A
- Document ID: US5269424A
- Status: Granted
- Kind: A
- Application number: 07/968,363
- Filed: 1992-10-29
- Granted: 1993-12-14
- Earliest claimed: 1991-06-26
- Assignees: Corcon
- Inventors: Gus Lyras
- Web page: https://patentgrep.com/patent/US5269424A

## CPC

- B24C 9/006: {Treatment of used abrasive material}
- Y02P 70/10: Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
- Y10S 209/935: Ambulant
- B24C: ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A process and apparatus for separation and recovery of used abrasive blasting material having intrained contaminate recovered from a work site. The intrained contaminates are removed by a self-contained multi-step separation process using magnetic vibratory and airwash separating apparatus including static neutralization interconnected by transfer apparatus and storage bins.

## Claims

### Claim 1

An apparatus for separation and recovery of contaminated abrasive blasting material comprises in combination a self-contained mobile trailer assembly, a separation apparatus on said trailer assembly, said separation apparatus comprising a magnetic separator, a vibratory screen separator and a primary and second airwash assemblies, said magnetic separator having a drum, at least one wiper blade engageable on said drum past a point of contaminated separation, a remote control product splitter, said primary airwash assembly having multiple spaced angularly inclined deflecting vanes and associated make-up inlets, each of said make-up air inlets having a static neutralization curtain transvector positioned adjacent thereto, said vibratory screen separator having a static neutralization transvector positioned thereon, means for transferring said abrasive blasting material from said primary airwash assembly to said second airwash assembly, a dust collector interconnected to said magnetic separator and said primary and secondary airwash assemblies, and a vacuum source for drawing off contaminates therefrom, transfer and storage means comprising multiple conveyor and storage bins, said secondary airwash assembly positioned in one of said storage bins, a source of electrical power and control for said separation apparatus, means for interconnecting said source of vacuum with said dust collector and said magnetic drum separator and said primary and secondary airwash assemblies and said vibratory screen separator.

### Claim 2 (depends on 1)

An apparatus for separation and recovery of contaminated abrasive blasting material of claim 1 wherein said dust collector and source of vacuum comprises a high pressure filter having an inlet and an outlet, multiple filter bags and a blower interconnected thereto.

### Claim 3 (depends on 1)

An apparatus for separation and recovery of contaminated abrasive blasting material of claim 1 wherein said source of electrical power comprises a self-contained mobile generator on said trailer assembly and said trailer assembly has multiple stabilizer arms, telescopically extensible therefrom.

### Claim 4 (depends on 1)

An apparatus for separation and recovery of contaminated abrasive blasting material of claim 1 wherein said means for transferring said abrasive blasting material from said primary airwash to said secondary airwash comprises a material conveyor extending therebetween.

### Claim 5

A process for separation and recovery of contaminated abrasive blasting material wherein said process comprises the steps of
(a) transferring contaminated abrasive blasting material to a mobile self-contained separation recovering apparatus,
(b) separating ferrous and non-ferrous material by a magnetic separator from said contaminated abrasive blasting material,
(c) separating contaminate within said abrasive ferrous material by a vibratory screen separator and specific gravity,
(d) static neutralization of said abrasive ferrous material and contaminates in said vibratory screen separator,
(e) removing airborne contaminates from said magnetic separator and vibratory screen separator through a primary specific gravity separator,
(f) static neutralization of abrasive ferrous materials and contaminates within said primary specific gravity separator,
(g) transferring said airborne contaminates to a filter media,
(h) filtering said airborne contaminates and exhausting clean air to atmosphere,
(i) transferring said abrasive ferrous material from said primary specific gravity separator to a secondary specific gravity separator,
(j) secondary separation of contaminates within said abrasive blasting material by said secondary specific gravity separator,
(k) transferring clean abrasive blasting material into a holding bin.