US1218977A

US1218977A - Ore-concentrating apparatus.

Info

Publication number: US1218977A
Application number: US85121714A
Authority: US
Inventors: George W Burnhart
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-07-13
Filing date: 1914-07-13
Publication date: 1917-03-13
Anticipated expiration: 1934-03-13

Description

' G. W. BURNHART.

ORE CONCENTRATING APPARATUS. APPLICATION FILED JULY 13' I9I4.

1,218,977. Patented Mar. 13, 1917.

2 SHEETS8HEET I. 4 I F :10 I

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l/IlI/E/VTOR 4' ATTORNEY G. W. -BUHNHART- ORE CONCENTRATING APPARATUS.

APPLICATION FILED IULY13. 1914.

Patented Mar. 13, 1917 2 SHEETSSHEET 2.

GEORGE W. BURNHART, F DENVER, COLORADO.

ORE-CONCENTRATING APPARATUS.

1,218,977. I Specification of Letters Patent.-

- Application filed July 13, 1914. Serial No. 851,217.

. To all whom'z't may concern:

7 Be it known that I, GEORGE W. BURN- HART, a citizen of the .United States, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Ore-Concentrating Apparatus, of which the following is a specification.

This invention relates to ore concentratingapparatus, and particularly to such apparatus as makes use of a table or deck across which is run a stream of water while the table is reciprocated for the purpose of separating the concentrates out of the ore'material. The invention is concerned mainly with the table or deck of this type of apparatus, and aims to provide a table of a new andimproved form of construction whereby the ore concentrating action will be, rendered considerably more effective and the capacity of the table materially increased. The improvements involve also a novel form of construction for the take-off or discharge of the concentrates separated while traveling across the table, by means of which further efliciency and increased capacity are obtained.

Having this general object in view, the invention will now be described with reference to one practical embodiment of the same which has been devised for carrying it into practice, as illustrated in the accompanying drawings, in which- Figure I is a plan View of the table, partly broken away;

- Fig. II is a longitudinal section on the line II-II of Fig. I;

Fig. III is a sectional perspective View.

of the head or ore-receiving end. of the table,

the section shown IIIIII of Fig. I; 4

Fig. IV is a fragmentary perspective view being along the line illustrating the discharge end of the launder or trough;

Fig. V is a sectional detail onan enlarged scale illustrating the action of the water flow in connection with the riffies of the table; and

. Fig. VI is a perspective view of one of the sliding gate members at the discharge end of the launder or trough.

Referring to the drawings, only the table pro er ofthe ore concentrating apparatus is s own, the means for supporting and reciprocating the same not being illustrated,

since the same may be of any approved form and constitutes no part of the present invention. The body of the table or deck comprises a bottom plate portion 2 over which is arranged a series of longitudinally extending timbers 4 in slightly spaced relation, and over these timbers in turn is laid a covering 6 of'any suitable material, such as lino- Patented Mar. 13, 1917.

leum, forming the floor of the table. The

table is constructed so that this floor will slope toward one of its longitudinal lines,

other ore-distributing means (not shown),

and also the stop-brackets 14 adapted to cooperate with fixed elements or stops 15 in imparting a shock or impact to the table brackets 12 for supporting the ore box or i when reciprocated in the direction of its head or ore-receiving end bymeans of any suitable reciprocating device, such for instance as the fiuid pressure motor, 15*, reference being here made to applicants Patent #1,142,551, of June 8, 1915, for a full understanding of said motor.

I Along the longitudinal line representing the lowest part of the table it is-provided with a longitudinal opening 16, below which 7 is carried a launder or trough 18 for the concentrates 21 separated from the ore material in traveling down the table toward the foot or end of the table where the tailings are. discharged. This trough or launder is secured to the table at opposite sides of said opening 16, and the channel 19 forming the bottom of the trough is inclined from the foot or tailings end of the table so that the trough increases in depth toward the head of the table where the concentrates are discharged (see Fig. II). The trough is suitably braced at intervals from the sides of the table by means of a series of stays 20.

At its deeper end the trough 18 is provided with a gate member 22,. sliding vertically within the retaining lugs 23 carried by the sides of the trough, and adapted to operate as avalve for providing an adjustable discharge opening between its lower end and the bottomof the trough (see Fig. IV), said sliding gate member being clamped,

when adjusted, by means of a wing nut 24 and a bolt 26 carried by'an upright flange 28 at the top of the discharge end of the trough, said bolt extending through a slot 30 in the gate member 22. Adjacent its lower end the gate member 22 is formed with an opening 32, passage through which is adj ustably controlled by a second gate member 34 also sliding vertically within said retaining lugs 23 and provided with a slot 36 to accommodate the bolt 26. The lower edge of the gate member 22 has an out-turned portion 38 to form a chute for the material discharged through the opening 32 into a different vertical plane from that discharged from the other opening at the bottom of the trough. As many discharge openings may be provided as may be desired at different elevations, by means of additional sliding gate members on the order of those above described, for the purpose of separating the concentrates according to the layers or grades into which they settle in the trough.

The surface of the table is equipped with a series of rifles or ribs 40 extending from the sides of the tableand diagonally across the same in the direction of the head of the table to the opening 16, the rifle nearest the head end of the table extending between the head end of the. table and the adjacent end of the opening 16, as illustrated. It will be observed that the side of each rifle or rib 40 facing in the direction of the foot of the table is undercut for the purpose of overhanging and shielding to a certain degree from the water-flow such mineral as becomes lodged against said undercut sides of the rifles by the reciprocating action of the table. Furthermore, the top surface of each rifle extends throughout in the same approximately horizontal plane, so that the only unbroken path for thewater-fiow is across the top surface of all the rifles at a slight distance above the courses followed by the concentrates along the bases of the rifles toward the opening 16 into the trough (see particularly Fig. V).

With the foregoing construction, it will be understood that the ore concentrates which settle throu h the sands and waste material as the tab e or deck is reciprocated will be compelled to move along in the direction of the rifles 40 toward the opening 16, through which they will drop into the launder or trough 18. The, slope of the table in the direction of this opening facilitates this travel of the concentrates, and as the action of the table in reciprocating causes the concentrates to be lodged against the undercut faces of the rifles, the concentrates are thus shielded from the force of the water-flow (as illustrated in Fig. V) and allowed to ass down along said overhanging faces wlthout material danger of being dislodged before reaching the opening into the trough. This works a considerable economy since more of the concentrates are saved which would otherwise pass over the foot of the table with the tailings; and also gives greater capacity because the concentrates travel faster down an incline than they would along a surface more nearly level. The formation of the rifles with their upper surfaces in practically the same plane also aids in bringing about the above result since the current of the water flow is maintained principally above the spaces between the rifles so as to disturb as little as possible the course of the concentrates toward the trough. in these respects, therefore, this combined feature of undercut or overhanging rifles upon a transversely sloping table surface is conceived to possess very important advantages over the types of reciprocating tables heretofore provided for this purpose; The trough 18 is arranged to take the concentrates passing through the opening 16 at any point along the same, and it is apparent that the depth of the trough is so graduated as not only to suit the requirements as to the amount of the material received at the various points alon the opening, but also to provide a path 0 travelfor the concentrates which is inclined in the direction in which they are traveling; consequently, the material will move the more rapidly down such an inclined path and thereby make roomfor more concentrated material, with the result that the capacity of the apparatus is still further increased. The adjustable sliding gates at the discharge end of the trough provide outlet openings at different elevations through which the material may 'be discharged and at the same time separated according to the layers or grades formed in the trough, thus always insuring clean concentrates as they will be taken from the lowest point in the trough.

While the foregoing represents what is now conceived to be the preferred mode of carrying the invention into practice, the right is reserved to such changes and modifications as may fairly fall within the scope of the appended claims.

Claims:

1. In an ore concentrating apparatus, a table having its upper surface sloping from the sides toward an intermediate lme extending longitudinally of the table, and rifles extending across the upper face of the table from said sides diagonally in the direction of the head or ore-receiving end of the table, the entire upper edge of each of said rifles lying in approximately the same horizontal plane, and means for imparting a shake to the table, adapted to propel the concentrates toward the head of the table.

2. In an ore concentrating apparatus, a table having its upper surface sloping from the sides. toward an intermediate line extending longitudinally of the table, and riftoward the head of the table.

3. In an ore concentrating apparatus, a table having its upper surface sloping from the sides toward an intermediate line extending longitudinally of the table, and riffles extending across the upper face of they table from said sides diagonally in the direction of the head or ore-receiving end of the table, said riflles being undercut on their sides facing the foot ortailings end of the table and the entire upper edges of said rillles lying in approximately the same horizontal plane, and means for imparting a shake to the table, adapted to propel the concentrates toward the head of the table.

--l. In an ore concentrating apparatus, the

con'ibination of a table having its upper surface sloping from the sides toward an intermediate line extending longitudinally of the table and provided with a longitudinal opening along said intermediate line and with riffies extending across the upper face of the table from said sides to said opening diagonally in the direction of the head or ore-receiving end of the table, said riflies being undercut on their sides facing the foot or tailings end of the table and the entire upper edges of said rifiles lying in approximately the same horizontal plane, and a concentrates trough underlying said opening, and means for imparting a shake to the table, adapted to propel the concentrates toward the head of the table.

In testimony whereof I aflix my signature in the presence of two witnesses.

- GEORGE W. BURNHART. Witnesses Lo'r'ra, R. CASE, BELLE S. FELIX.