Patent US3709359A successfully refreshed from Google Patents.
US3709359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ore classifier
Assignee: Individual
•
Filing: 1970-01-26
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Granted: 1973-01-09
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Expires: 1990-01-26
Abstract
Abstract An ore classifier in which a mass of reduced ore having a commingled gangue and mineral particles in it is circulated under blower pressure in a vertical plane in a somewhat circular chamber wherein the inlet for the commingled mass and the outlet for the gangue are tangential to the chamber and cross each other at the bottom through a plenum to scrub the gangue of any concentrate electrostatically held thereon. A classifier stack is disposed vertically at the top of the chamber for levitation of fines in relation to their size and weight for classification purposes and the classification means may be a plurality of spaced openings or an extendable member selectively adjustable for regulating the withdrawal of classified concentrates into a collection tank. A baffle system defining in part the primary path of flow of the incoming commingled mass operates to recirculate any uncollected concentrates still mixed in with outgoing gangue and return same to the stack.
Inventors
- 👤 C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:58
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/01; B07B7/08; B07B7/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
216 words
In an ore processing apparatus, a classifier for classifying mineral fines according to size, said classifier comprising a generally circular housing oriented with its axis disposed horizontally with curved laterally spaced walls and including a lower outlet opening adjacent to an upwardly inclined wall portion of said housing and a lower inlet opening adjacent to a downwardly inclined wall portion of said housing, said openings crossing each other at an acute angle to define a plenum, means to introduce air entrained reduced ore under pressure thru said inlet and across said outlet, said air entrained ore moving upwardly and perpherally adjacent said outlet and downwardly adjacent said inlet and an upper outlet opening; inclined baffle means disposed within said housing bordering the path of incoming material including a plurality of vertically spaced baffle plates inclined towards said inlet opening and disposed between said spaced walls and whose lower faces define in cooperation with said upwardly directed wall portion of the housing a restricting peripheral passage for upward flow from the inlet of air entrained mineral fines therethrough and directly to the upper outlet opening; a classifier stack extending upwardly from the outlet opening and having a classifier opening at a predetermined level for removal of the mineral fines by movement of air through said classifier opening.
Claim 2
Dependent Claim
216 words
In an ore processing apparatus, a classifier for classifying mineral fines according to size, said classifier comprising a generally circular housing oriented with its axis disposed horizontally with curved laterally spaced walls and including a lower outlet opening adjacent to an upwardly inclined wall portion of said housing and a lower inlet opening adjacent to a downwardly inclined wall portion of said housing, said openings crossing each other at an acute angle to define a plenum, means to introduce air entrained reduced ore under pressure thru said inlet and across said outlet, said air entrained ore moving upwardly and perpherally adjacent said outlet and downwardly adjacent said inlet and an upper outlet opening; inclined baffle means disposed within said housing bordering the path of incoming material including a plurality of vertically spaced baffle plates inclined towards said inlet opening and disposed between said spaced walls and whose lower faces define in cooperation with said upwardly directed wall portion of the housing a restricting peripheral passage for upward flow from the inlet of air entrained mineral fines therethrough and directly to the upper outlet opening; a classifier stack extending upwardly from the outlet opening and having a classifier opening at a predetermined level for removal of the mineral fines by movement of air through said classifier opening.
Claim 3
Dependent Claim
48 words
In an apparatus according to claim 1 in which said lower outlet opening is a gangue outlet opening disposed adjacent to the inlet opening to discharge heavy particles after they have passed through the flow of air entrained minerals for scrubbing mineral values from the falling heavy particles.
Claim 4
Dependent Claim
40 words
In an apparatus according to claim 1 in which said classifier stack comprises two telescoping tubular members, the upper one of which has the classifier opening in it for removal of the mineral values from the duct according to size.
Claim 5
Dependent Claim
180 words
A particle classifier comprising: a housing having a wall and an upper outlet opening and lower inlet and outlet openings; means to direct particles to be classified from said lower inlet opening in an upwardly directed peripheral path in said housing separate from a return path of gangue to the lower outlet opening; a classifier stack extending upwardly from said upper outlet opening; a source of a pressurized gas to propel said particles from the inlet opening along said upward path and toward said classifier stack to maintain a positive gauge pressure within said classifying device; vertically adjustable outlet means on said classifier stack to control the size of particle emitted whereby the smaller of said particles are emitted through said outlet means and the larger of said particles fall back and through said lower outlet opening; and baffle means provided between the two paths to coact with said wall and direct said particles from said lower inlet opening in an upwardly oriented peripheral path: said baffle means including a plurality of spaced baffle plates inclined towards said inlet opening.
Claim 6
Dependent Claim
180 words
A particle classifier comprising: a housing having a wall and an upper outlet opening and lower inlet and outlet openings; means to direct particles to be classified from said lower inlet opening in an upwardly directed peripheral path in said housing separate from a return path of gangue to the lower outlet opening; a classifier stack extending upwardly from said upper outlet opening; a source of a pressurized gas to propel said particles from the inlet opening along said upward path and toward said classifier stack to maintain a positive gauge pressure within said classifying device; vertically adjustable outlet means on said classifier stack to control the size of particle emitted whereby the smaller of said particles are emitted through said outlet means and the larger of said particles fall back and through said lower outlet opening; and baffle means provided between the two paths to coact with said wall and direct said particles from said lower inlet opening in an upwardly oriented peripheral path: said baffle means including a plurality of spaced baffle plates inclined towards said inlet opening.
Claim 7
Dependent Claim
25 words
A classifier in accordance with claim 4 wherein said housing is essentially circular with closed ends and is oriented with its axis disposed substantially horizontal.
Claim 8
Dependent Claim
32 words
A classifier in accordance with claim 4 wherein said baffle means extends over said lower inlet opening to direct descending gangue particles falling against it back into said upwardly oriented peripheral path.
Claim 9
Dependent Claim
18 words
A classifier in accordance with claim 4 wherein said paths cross above said lower inlet and outlet openings.
Claim 10
Dependent Claim
18 words
A classifier in accordance with claim 4 wherein vertically spaced aperture means are provided along said classifier stack.
Claim 11
Dependent Claim
25 words
A classifier in accordance with claim 4 wherein gangue particles pass through the incoming stream of air entrained particles befOre reaching the lower outlet opening.
Claim 12
Dependent Claim
196 words
A particle classifier comprising; a housing having a wall and an upper outlet opening and lower inlet and outlet openings; means to direct particles to be classified from said lower inlet opening in an upwardly directed peripheral path in said housing separate from a return path of gangue to the lower outlet opening; a classifier stack extending upwardly from said upper outlet opening; a source of a pressurized gas to propel said particles from the inlet opening along said upward path and toward said classifier stack to maintain a positive gauge pressure within said classifying device; vertically adjustable outlet means on said classifier stack to control the size of particle emitted whereby the smaller of said particles are emitted through said outlet means and the larger of said particles fall back and through said lower outlet openings; said classifier stack comprising two telescoping conduit members, the lower one of which has major cross-sectional dimensions throughout and the upper conduit member has major cross-section dimensions on its lower end telescoping in said lower conduit member and tapering to minor cross-sectional dimensions at its upper end; said upper conduit member having a discharge opening in its upper end.
Claim 13
Dependent Claim
196 words
A particle classifier comprising; a housing having a wall and an upper outlet opening and lower inlet and outlet openings; means to direct particles to be classified from said lower inlet opening in an upwardly directed peripheral path in said housing separate from a return path of gangue to the lower outlet opening; a classifier stack extending upwardly from said upper outlet opening; a source of a pressurized gas to propel said particles from the inlet opening along said upward path and toward said classifier stack to maintain a positive gauge pressure within said classifying device; vertically adjustable outlet means on said classifier stack to control the size of particle emitted whereby the smaller of said particles are emitted through said outlet means and the larger of said particles fall back and through said lower outlet openings; said classifier stack comprising two telescoping conduit members, the lower one of which has major cross-sectional dimensions throughout and the upper conduit member has major cross-section dimensions on its lower end telescoping in said lower conduit member and tapering to minor cross-sectional dimensions at its upper end; said upper conduit member having a discharge opening in its upper end.
Claim 14
Dependent Claim
196 words
A particle classifier comprising: a circular housing defining a circular compartment with vertical disposed spaced side walls with an upper outlet and lower inlet and outlet openings; baffle means cooperating with a circular wall portion of said housing to direct a stream of gas entrained particles from said lower inlet opening in an upwardly peripheral path in said compartment, said baffle means including a plurality of inclined, vertically spaced baffle plates and extending over said lower inlet opening at one end and converging towards each other at the other to provide at least one venturii throat between them; a classifier stack extending vertically upward from said upper outlet opening; a source of a pressurized gaseous medium to propel said entrained particles along said upward path and toward said classifier stack and to maintain a positive gauge pressure within said classifying device; vertically adjustable outlet means on said classifier duct to control the size of particle emitted from the stack; whereby the smaller of said particles are transmitted through said outlet means on said classifier stack and the larger of said particles pass through said stream of gas entrained particles before discharge through said lower outlet opening.
Claim 15
Dependent Claim
196 words
A particle classifier comprising: a circular housing defining a circular compartment with vertical disposed spaced side walls with an upper outlet and lower inlet and outlet openings; baffle means cooperating with a circular wall portion of said housing to direct a stream of gas entrained particles from said lower inlet opening in an upwardly peripheral path in said compartment, said baffle means including a plurality of inclined, vertically spaced baffle plates and extending over said lower inlet opening at one end and converging towards each other at the other to provide at least one venturii throat between them; a classifier stack extending vertically upward from said upper outlet opening; a source of a pressurized gaseous medium to propel said entrained particles along said upward path and toward said classifier stack and to maintain a positive gauge pressure within said classifying device; vertically adjustable outlet means on said classifier duct to control the size of particle emitted from the stack; whereby the smaller of said particles are transmitted through said outlet means on said classifier stack and the larger of said particles pass through said stream of gas entrained particles before discharge through said lower outlet opening.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |