US3782528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and a device for mixing and homogenizing of bulk material
Assignee: Hoogovens En Staalfabrieken Nv nl
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Filing: 1971-09-10
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Granted: 1974-01-01
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Expires: 1991-09-10
Abstract
Abstract In a method and means for mixing and homogenizing bulk material such as lump ore and ore concentrates, in which a mixing heap is formed by dumping the material as a large number of layers one on top of the other, said mixing heap thereupon being dug off over the entire height, in which for forming said mixing heap the material to be dumped in layers is fed by a digging machine onto a belt conveyor system and is dumped from this system by a longitudinally moving dumping machine onto the said mixing heap, the material during transport to the dumping machine passes through a throughflow hopper, from which it is discharged in a constant flow, and the speed of the digging machine is controlled in dependency upon the filling of this hopper by special mechanisms, preferably comprising a metering device below the hopper, weight signalling means, weight-to-volume converting means, and special supports and controls.
Inventors
- 👤 J Burger
- 👤 Jong G De
- 👤 Boer G Den
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:23
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/10; B65G47/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
162 words
A method for forming a mixing heap of bulk material consisting of a large number of horizontal layers of material, one on top of the other, comprising digging and feeding the bulk material from a material source to a hopper zone, maintaining a weight control of said hopper, discharging the bulk material from said hopper zone to a conveying zone, maintaining a weight control of the material discharged from said hopper zone to said conveying zone, passing the material in a constant flow from the conveying zone to the material heap being formed to form a horizontal layer thereon, and correlating the control of the weight of the feed of the material to said hopper zone, the control of the weight of the feed of the material from the hopper zone, and the control of the weight from the zone to the heap such that the speed at which the material is dug is dependent upon the filling of the hopper zone.
Claim 2
Independent Claim
162 words
A method for forming a mixing heap of bulk material consisting of a large number of horizontal layers of material, one on top of the other, comprising digging and feeding the bulk material from a material source to a hopper zone, maintaining a weight control of said hopper, discharging the bulk material from said hopper zone to a conveying zone, maintaining a weight control of the material discharged from said hopper zone to said conveying zone, passing the material in a constant flow from the conveying zone to the material heap being formed to form a horizontal layer thereon, and correlating the control of the weight of the feed of the material to said hopper zone, the control of the weight of the feed of the material from the hopper zone, and the control of the weight from the zone to the heap such that the speed at which the material is dug is dependent upon the filling of the hopper zone.
Claim 3
Independent Claim
118 words
A device for forming homogeneously built-up mixing heaps of bulk material consisting of a plurality of horizontal layers of different materials comprising a digging machine for digging the material from a supply source, longitudinally movable flow-through hopper means, conveyor means for carrying said material from said digging machine to said hopper means, metering means associated with the discharge end of said hopper means, discharge conveyor means operatively associated with said metering means to receive the material from said hopper means and to discharge same to a heap to form a horizontal layer of bulk material thereon, and means to detect the degree of filling of the hopper means and to thereby control the speed of the digging machine.
Claim 4
Independent Claim
118 words
A device for forming homogeneously built-up mixing heaps of bulk material consisting of a plurality of horizontal layers of different materials comprising a digging machine for digging the material from a supply source, longitudinally movable flow-through hopper means, conveyor means for carrying said material from said digging machine to said hopper means, metering means associated with the discharge end of said hopper means, discharge conveyor means operatively associated with said metering means to receive the material from said hopper means and to discharge same to a heap to form a horizontal layer of bulk material thereon, and means to detect the degree of filling of the hopper means and to thereby control the speed of the digging machine.
Claim 5
Dependent Claim
117 words
A device in accordance with claim 2, characterized in that said hopper means is provided with two discharge orifices, each of said orifices being provided with metering means for discharging material to a single discharge conveyor means, and further characterized in that said hopper means is supported by three support means, one of said support means being centrally positioned to permit pivotal movement and the other of said support means includes load measuring means therewith and a control device for controlling the relation of the discharge speed of said metering means, said load measuring means including means to transmit electrical signals indicating load measurement on each of said support means to said control device to actuaTe same.
Claim 6
Dependent Claim
67 words
A device in accordance with claim 2, characterized in that said discharge conveyor means is provided with conveyor belt weighing means, and adjustable quantity control means operatively connected on one side to said belt weighing means and on the other side to said metering means whereby the total quantity of material metered per unit time may be controlled so as to be maintained at an adjustable level.
Claim 7
Dependent Claim
18 words
A device in accordance with claim 2, characterized in that the metering means are mechanically driven pulsating troughs.
Claim 8
Dependent Claim
58 words
A device in accordance with claim 2, characterized in that the means for controlling the speed of the digging machine will also stop the conveyor means for the supply to and discharge from said throughflow hopper means if the material in said hopper means is higher than a critical level or is lower than a critical level respectively.
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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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |