US814896A - Ore-concentrating apparatus. - Google Patents

Description

I 7 PATENTBDJMAR. 13, 1906. J. F. c. ABEL'SPIES. ORB GONGENTRATING APPARATUS AIYPLIOATION FILED AUG. 15. 1904.

%in e my lkmzra 1 Mm-MW UNITED STATES ATENT orrion.

. -HORE-C'ONCEVNTRIATING APPARATUS.

. a. no. 814,896.

Specification of Letters Patent.

Patented March 13,1906.

Application filed August 15,1904. SeriaYNo. 220,864.

To aLZ' whom it may concern:

Be it known that I, 'JoHN FREDERICK.

CHARLES ABELSIPIES, a subject of the German Emperor, and a resident of Polmear Mine, Charlestown, in the county of Cornwall, England, have invented certain new and useful Improvements in OreCncentrat-. ing Apparatus, of which the followingis a I specification.

This invention relates to improvements in ore-concentrating apparatus; and it consists of a special arrangement of the kind in which the action of water flowing over a transversely-inclined reciprocating table is em- 5 ployed.- I

In most concentrators having rifled surfacesthe discharge of the concentrates takes place 'at the lower end of the table diagonally opposite to the feed-intake, and the rifles acting as checks against the downfiow of material each receives a certain portion of ore, the mineral particles of which are supposedto travel within the rifles toward the discharge end. The rifles run either straight in A the direction of the motion or more or less diagonally upward toward the higher side:

. The actionof the table frequently causes overloading and leaves a large part of the table-surface unavailable for actual concentration work. I propose to employ rifles extending from the feed-intake on the higher side of the inclined table and slanting downward in a suitable form toward-the lower side, so that the wash-water on striking'the rifles forms aswirl or small return-current at the edges, which prevents the concentrates or mineral particles gathering close to the riffles and at the same time assists the gangue' particles to separate. Each rifle brings about the'formationof definite streaks or streams of mineral and gangue or waste, which are collected at'the lower edge of the table, and the'concentrates from each rifle may be collected separately. u i In order that this invention. may be more readily understood, reference is had to the accompanying sheet of drawings, in which Figure 1 is a plan of a table having rifles formed according to my invention, and Fig.

2 is a similar view of a slightly-modified con struction.

The table A is mounted and reciprocated longitudinally in the manner common to such tables, reciprocating means A being shown diagrammatically in the drawings, and slopes downward at an angle from top to bottom, so

that the wash-water which is led from the up per side flows in the direction of the arrows in the form of a thin sheet of water over the table. The feed-intake for the ground ore or slimes is indicated at B at the upper right-'v hand corner of thetable, while the wash-water is supplied in the well-known manner along the remainder of the upperedge.

In the apparatus shown in Fig. 1 the rifles C are formed in the two main parts 0 .and c,

the arts 0 being situated immediately below the eed-i'ntake and sloping downward from rightto left at 'a small angle, having a fall of about 'halfan inch to one foot. The parts 0 of the rifles eXtend-downwardly from the end of cand form an angle of about forty-five degrees with the ed e of thetable, so that each rifle has a ben which may be sharp, as shown in the drawings. The parts 0 and c of each rifle are arranged, as shown in the drawings, parallel to one another, so that each forms a succession of parallel ribs separated by suitable intervals. I prefer to decrease the intervals between the parts 0 in successive rifles extending from left to right, as the lower rifles'successively treat smaller portions of ore'andrequire less space. The

'slimes flowing in from the feed intake B down the inclined table strike against the part c of the top rifle, overflowing this rifle and.the successive rifles as each one be- 1 comes fully charged. The slightslope ofthe parts 0. directs the, ore downward and to the left, the reciprocating action of the table of course assisting, and the wash-water carries the material downward with it, forming, as already mentioned, 'a swirl as it strikes the rifle and more especially the part c, which has a steeper slo e. It isfound that the effect of this swirl 1s to cause a clean separation of the concentrates and the waste, as shown by the dotted parts X and Y, X indicatin the stream of concentrates which are directe away from the inner stream of gangue, thelatter collecting a short distance from the f rifle and following the lines of the water-swirl produced close to the edge. The swirl or return current imitates the action of the handvanning shovel and causes the mineral to wash in front of the gangue.

It is found that,

as shown in the drawings, each rifle formed in this manner causes separate streams of. concentrates and angue, which are separately collected at t e lower edge a of'the table, a vertical bar or rib a be1n placed, if

necessary, at the end of the tab e to direct the upper or left-hand stream toward the outlet at the lower edge. The movable guides or pointers D shown at the lower edge of the table separate the streaks of concentrates and waste, which are directed into separate channels. The finer concentrates and gangue are washed over the upper riflles and collected and separated by the lower ones. Where several minerals are included in the ore, they are se arated into different streaks by the action 0 the riffies, according to their specific gravity and fracture, and each streak is separately taken ofi. At the lower end of each rifile I have shown a small vertical portion 0 which assists to some'extent in directing the streak of gangue; but this vertical part is not essential.

In the modification shown in Fig. 2 the form of the rifiies is somewhat different, each riflie E having a continuous curve from the upper righthand end to the lower, the steeper part 6 of the curve, however, havin a slope of about thesame amount as c in the first figure. The action of these rifiles is similar to that of the first form and requires no further description.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a concentrator, a transversely-inclined reciprocating table, feeding means extending along a portion of the upper longitudinal edge of the table, longitudinal rlffies extending transversely of the line of feed for a portion of the table len th, partitions ex tending from the ends of t e said rifiles diagonally to the lower side of the table, and means at the lower end of each of the concentratingsections formed by said partitions for separately collecting the grades separated by said sections.

2. In a concentrator, a transversely inclined reciprocating table, feeding means extending along a portion of the upper longitudinal edge of the table, rifiles extending transversely of the line of feed for a portion of the table length and sloping downwardly at a small angle, partitions extending from the ends of the said riflies diagonally to the lower side of the table, and means at the lower ends ofeach of the concentrating-sections formed by said partitions for separately collecting the grades separated by the sections.

3. In a concentrator, a transversely-inclined reciprocating table, feeding means extending alon a portion of the upper lon itudinal edge of the table, parallel longitudinal rifiles extending transversely of the line of feed for a ortion of the table length, partitions para lel to each other extending from the ends of the said rifiles diagonally to the lower side of the table, and means at the lower end of each of the concentrating-sections formed by said partitions for separately collecting the grades separated by the sections.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

JOHN FREDERICK CHARLES ABELSIIES.

Witnesses:

FRANK WILLIAM PATTISON, WILLIAM JAMEs Cox.

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