US1334524A - Concentrating apparatus - Google Patents

Description

E. DEISTER. CONCENTRATING APPARATUS. APPLICATION FILED APR. 21. 1917.

'A,33 -l,52% Patented Mar. 23, 1920.

4- $HEETS-SHEET I.

F'lGl WITNESSES E. DEISTER.

CONCENTRATING APPARATUS. APPLICATION FILED APR-21. 1917.

Patented Mar. 23, 1920 4 SHEETSSHEET 2.

F HILQ- WITNESSES m INVENTEJH E. DEISTER.

CONCENTRATING APPARATUS. APPLICATION FILED APR.2I, 1917.

1,334,524. Patented Mar. 23, 1920 4 SHEETS-SHEET 3- WITNESSES E. DEISTER. CUNCENTRATING APPARATUS. APPLICATION FILED APR. 2

1,334,524, Patented Mar. 1920.

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UNITED STATES PATENT OFFICE.

EMIL DEISTEB, OF FORT WAYNE, INDIANA, ASSIGNOR TO DEISTER MACHINE COMPANY,

OF FORT WAYNE, INDIANA, A CORPORATION OF INDIANA.

GONCENTRATING APPARATUS.

Specification of Letters Patent.

Patented Mar. 23, 1920.

To all whom it may concern:

Be it known that I, EMIL DEIS'IER, residing at Fort Wayne, in the. county of Allen and State of Indiana, a citizen of the United States, have invented or discovered certain new and useful Improvements in Concentrating Apparatus, of which improvements the following is a specification.

When pulp is fed onto a table and flows by reason of the inclination of the table, toward its lower or tailings discharge, the heavier particles or values settle down onto the surface of the table, so that there is present on thi table a lower stratum orlayer consisting of the values, an upper stratum consisting of sand containing a minimum amount of values, and an intermediate stratum consisting of sand and a very considerable percentage of values. Were it not for the presence of rifles, these strata would flow to ether toward the tailings discharge edge. he purpose of the rifles is to stop the flow of values toward the tailings discharge edge and divert their direction of How toward the mineral discharge edge without checking or diverting the normal flow of-the sand. stratum, out of which the values have settled. Hence it is the practice to make the rifles of a height greater than the thickness of the lower stratum but not suflciently high as to extend into the upper stratum which is free from values. As these upper and lower strata merge one into the other, a percentage of values will pass over the rifles, and a very considerable percentage of, sand will be caught by the rifles, and will move with the values toward the mineral discharge edge. While in eflicientlyoperating tables, a maximum of the minerals or values will reach the mineral discharge edge, the movement of the sand, caught by the rifles from the line of separation, toward the middlings discharge edge, will have mixed therewith a considerable percentage of minerals and hence the middlings will be undesirably high iii-minerals.-

It is well lmown that a nearly perfect separation of the values from the sand can be eflected on a table having low and closely arranged rifles, such as'are formed by cutting shallow grooves or line corrugations in the surfaces otthe tables, the depths of the grooves being substantially equal to the thichiess of the lower or values stratum.

On a table having such low closely arranged rifles not only the upper or sand stratum, but also the intermediate stratum of mixed sand and values will flow over the rifles without retardation or diversion, but the values .will settle into the shallow grooves and constant line of separation and of low closely adjacent rifles or corrugations for the segregation of values passing over the main rifles with the sand. The invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification, Figure l is a top plan view of what is known as the Deister du lex plateau table having the invention de ribed herein applied thereto; Fig. 2 is a p plan view of another type of table em odying the improvement; Figs. 3 to 9 inclusive are sectional detail views showing on an enlarged scale forms or embodiments of the invention forming the subject matter claimed herein; Fig. 10 is similar to Fig. 2, but showing in connection therewith a Deister plateau; Fig. 11 isAa-sectional view on a plane indicated by the line XL-XI, Fig. 10; Fig. 12 shows another method of applying the improved rifle to a table, the ends of the rifles being bent toward the feed side; Fig. 13 shows the improved rifle applied to a table in such manner as to intersect the line of movement of the table; Fig. 14 is a view similar to Fig. 13 but showing in addition the Deister plateau, and Fig. 15 is a cross section on line XV-XV, Fig. 14.

.While the improvement claimed herein is shown in connection with a Deister single or double plateau and several other types of concentrating tables, it ,will be understood that the improvement can be applied to any other form, shape or construction of table.

In the practiceot the invention, the main rifles 1 are arranged in any suitable manthe cross sectional contour of these ner or at any desired angle to the line of flow of material from the point of feed toward the tailings discharge edge, or to the line of movement of the table. Generally, these rifles are made of a height, equal or approximately equal to the normal and average depth of the stratum formed by minerals which have settled out of the pulp, but as the depth of this stratum will depend very largely on the richness or leanness of the material treated, the height of the rifles will vary considerably. And further, these main rifles which are adapted to divert the direction of movement of the values toward the mineral discharge edge of the table and also to establish and maintain the line of separation constant as herebefore described, may be of uniform height throughout their entire length or such height may vary. These 1113.101 rifles are made of suflcient width on top to permit of theformation thereon of corrugations consisting at least of two ridges and an intermediate groove or valley, but from this minimum, the main rifles may be made of any desired width. It is preferred however, to construct the main rifles 1 so that there will be a plurality of small auxiliary corrugations on top of each main rifle. The main rifles may be constructed in any suitable manner as, for example, by strips of wood, metal, rubber, or glass fastened to the table, or by cutting away portions of thetable intermediate the desired positions of the main rifles, and the small or auxiliary corrugations 2 may be formed on the top of these main rifles, by cuttingthe grboves in the surfaces of these mam rifles, by securing narrow strips on the tops of the main rifles, by attaching cap strips of glass, metal, wood, rubber, linoleum, or any other suitable" material having their upper faces suitably corrugated on the tops of strips attached to or integral with the main deck or cover of the table. The auxiliary corrugations may be of any desired shape 2'. e., inverted Vs, Vs with concave sides, rectangular, or in the form of truncated cones, as shown in the several views.

In applying the main rifles having corrugations or auxiliary rifles formed on their surfaces, as described, to the deck of a table they may be arranged with the ends toward mineral discharge edge on a diagonal line as in the tables shown in Figs. 2, 12 and 1-3, or the discharge ends ofthe main rifles may terminate on an inclined surfare as shown in Figs. 10, 11, 14 and 15, or at any desired point beyond the same as in the Deister table shown in Fig. 1, or any other suitable means known in the art, may be employed for determining and maintain ing a constant line of separation of the sand and minerals.

As the main rifles are of a height equal to or not materially greater than the depth of the stratum of values in contact with the table, comparatively little sand will be caught anddiverted by these main rifles, and the material flowing over the main rifles will contain quite a relatively large percentage of values. But in passing across the corrugated surfaces of the main rifles, more or less of these values will settle down into the fine grooves or valleys intermediate the small ridges, and, due to the vibration of the table, will move along the same and be discharged from such grooves or valleys at the ends of the main rifles.

It is characteristic of a table having the improved rifles, that as the percentage of sand caught and diverted by the main rifles is reduced to a minimum, and as very little sand will be caught and carried along with the values by the corrugations or auxiliary rifles, the percentage of sand delivered at the line of final separation of the values and sand, is small and the percentage of values which is discharged over the middlings discharge edge, will also be reduced to a minimum.

As hereinbefore stated, the table with which my invention is incorporated may be formed of the usual or any desired shape or contour. In Fig.1 is shown what is known as the Deister duplex plateau table, which is provided, adjacent to the mineral discharge edge, with one or more plateaus 3, the approaches to which are inclined as at 4. The main rifles 1 are arranged as shown and described in Letters Patent No. 1,088,685, dated March 3rd, 1914, and may extend to the apex of the first incline 4 or to that of the second incline, and in some cases entirely across the plateau, the rear end of which forms the mineral discharge edge of the table. These rifles are preferably formed substantially wider than those heretofore employed and are provided on their upper surfaces with corrugations 2. It will be understoodthat the invention described herein is not limited as regards the width of the main rifles, nor of their spacing along the table, but it is generally preferred to so space the main rifles that the channels between adjacent rifles will be less than the width of the main rifles themselves.

In the type of table shown in Fig. 2, the main rifles increase in length from the upper to the lower edge of the table, so that their discharge ends will be on a diagonal line, along or adjacent to which the final separation of the values and the sand occurs. The width and spacing of the main rifles on this type of table will vary with the character of the. material treated. In Fig. 10, the improved rifle is shown applied to a table having a plateau 11 with an inclined approach 12, as described and claimed in Letters Patent No. 1,040,164, granted October 1, 1912 to I). and W. F. Deister, and No. 1,209,943, granted December 26, 1916, to Emil Deister. The portions of the rifles on this incline should be tapered corresponding approximately to the degree of slope of the incline 12. In the construction shown in Figs. 10 and 11, as well as the constructions shown in other figures, it may be advisable in case of highly mineralized ore, to extend shallow' rifles either part way or all the way across the washing surface, as shown and described in the patents above referred to.

As will be seen by reference to Figs. 3 to 9 inclusive, the rifles may be constructed in a variety of ways and the corrugating or riffling of the upper surfaces effected either by forming ridges and intermediate grooves in the surface of the rifles, or by securing to the top ofthe rifles a strip of suitable material having its upper surface corrugated; In Fig. 3, the main rifle 1 is shown as formed of wood and having V-shaped grooves cut in its upper surface. The corrugations consisting of ridges and intermediate grooves thus formed on the upper surfaces of the major rifles may be of any desired shape in cross section and of any desired size, z. e., with a considerable depth and width of grooves as shown in Fig. 3, or with a shallow and narrow groove as shown in Fig. 4. The major rifles may be formed. of metal strips 1 as shown'in Fig. 5, or. of strips of glass as shown in Fig. 6. The corrugations on the tops of these main rifles ma be fine and relatively low or the ridges an intervening grooves may be angular in cross section and .of considerable width, as shown in Fig. 6. If desired, strips 5 of linoleum or rubber may be employed as main rifles, the upper surfaces being corrugated, as shown in Fig. 7. The desired height of the main rifling may be attained by inserting a strip 6 between the linoleum forming the surface of, the table and the strip 5 forming the rifle, as stated, orif preferred, the

main-rifle may be made solid, as shown at 7 in Fig. 8 and its upper surface, which is formed with grooves and alternating ridges may be made convex.

Another form which is desirable consists in making the main portion of the rifle of a strip 8 of suitable material and providing a cap 9 therefor, which may be made of wood, metal, glass, linoleum or rubber, 'or a any other suitable material, said cap having its surface corrugated in any suitable manner.

In most cases, it will be preferred to cover the deck of the table with linoleum as at 10, as is the usual practice, but such covering is not necessary in the practice of the invention described herein, and further if de-, sired, the surface of the table itself whether formed of wood, linoleum, rubber or other material. may be provided with fine corrugations as shown in Fig. 9, substantially in the same manner as practised in corrugating the upper surface of the main rifles.

As the channels intermediate the major rifles on a table will divert not only the minerals but also the sand caught between these rifles and mingled with the stratum of minerals, the larger the total area of the channels, the larger the percentage of sand carried toward the mineral discharge edge. And further, it has been found that when the ore is coarse, it will respond more quickly to'the differential vibrations of the table, and will move so quickly along the channels that eflcient washing out of sand cannot be effected unless the table is given an excessive transverse inclination. It will be understood that by making the main rifles wider the channel areas are-proportionally decreased, and by making the main rifles lower and at the same time providing them with means for receiving values; from the material passing over them, concentration of the coarse ores can be efiected without adjusting the table to an excessive transverse inclination.

Fig.12 shows a construction in which portions of the improved rifles are arranged parallel with the direction of vibration of the table, and the portions 13' of the rifles adjacent to the cleaning up surface 14 are inclined to thev direction of motion for the purpose of facilitating the final separation of the sand and values. In some cases, it may be desirable to arrange the entire rifle at an angle to the direction of vibration, as shown in Figs. 13 and 14, and to combine such angular arrangement of rifles with a. plateau 11, having an inclined approach 12 as shown in Figs. 14 and 15.

I claim herein as my invention:

1. A reciprocating table having a com centrating surface and adapted to transport concentrates to the discharge edge thereof, said table being inclined for gravital' flow transverse of the direction of travel of concentrates, rifles on said surface in' spaced relation and extending in the direction of concentrate travel, the tops of said rifles being substantially parallel with the table surface in the direction of gravital flow and each of said tops being provided with a plurality of longitudinal ridges and coves substan-, tially narrower and shallower than the chain' nels between the rifles. I

2. A reciprocating table having a; concentrating surface and adapted to transport concentrates to the discharge edge thereof, said table being inclined for gravital flow transverse of the direction of travel of'colF centrates, said table having alternating channels and rifles extending in the direcbeing provided with a plurality of longitudinal ridges and grooves substantially narrower than the channels between the rifles.

3. A reciprocating table having a concentrating surface and adapted. to transport concentrates to the discharge edge thereof, said table being inclined for gravital flow transverse of the direction of travel of concentrates, rifles on said surface in spaced relation and extending in the direction of concentrates travel, the tops of said rifles being substantially parallel with the table surface in the direction of gravital flow and each of said tops being provided with a plurality of longitudinal ridges and grooves substantially shallower than the channels between the rifles.

4. A reciprocating table having a concentrating surface and adapted to transport concentrates to the discharge edge thereof,

said table being inclined for gravital flow transverse of the direction of travel of concentrates, rifles on said surface in spaced relation and extending in the direction of concentrates travel, the tops of said rifles being substantially parallel with the table surface in the direction of gravital flow and each of said tops bein provided with a plurality of longitudina ridges and grooves substantially narrower and shallower than the channels between the rifles; in combination with an upwardly inclined surface arranged along a diagonal line relative to the line of movement of the table, said inclined surface being co-extensive with the line of separation between the mineral and gaugue. In testimony whereof I have hereunto set my hand.

EMIL DEISTER. 'Witnesses:

R. L. FEAGLEs, SYNA HANSER.

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