US1505741A - Concentrator - Google Patents

Description

A. H. STEBBINS CONCENTRATOR Filed June 30, 192 2 V/NVENTOR.

ATTORNEY Patented Aug. 19, 1924.

UNITED STA ES PATENT oFi-"ica.

ALBERT a. surname, or nos ,ANGELES, cntrroma.

Application filed June so, 1922. Serial n. 572,048.

- Toallwhomitmy concern:-

Be it known that I, AIBERT H. S'rmnms, a citizen of "the United States, .residing at Los Angeles, in the count of Los An les and State of California, ave invente an Improvement inOoncentrators, of which the following descri tion, in connection with the accompanying raw-in is a specification, like characters on the rawings representing like parts.

ment of ores or other materials that are in' a relatively fine state, and effects separation of the materials in accordance with their difierences in specific gravity.

One important feature of the'present invention resides in a casing having a wall sodisposed spirally within the case to impart a spirally whirling movement to air bearing the materials to be treated so that the heavier particles within the air will be thrown out-*1 tudinally within the wall of the casing at wardly by centrifugal force.

Another feature of the invention resides in a casing having an aperture in a wall thereof through which the heavier particles are thrown b centrifugal force, and in a nozzle adjusta 1y mounted adj ac'ent the aperture for directing a blast of air inwardly to deflect the lighter materials inwardly away from the aperture.

Another feature ofhe invention resides in a casing'havin'g a spiral wall within one i portion thereof to impart a spiral movement to the air within the casing and having spaced bafiie walls in another portion of the casling to promote separation of the materla s. 1

Other features of the invention and novel combination-of parts in addition to the abovewill be hereinafter described in connection with the accompanying drawings which illustrate one good practical form thereof.

mounted atone end of the casin .rotated by a pulle 12 to force t e material bearin .iher'eo with'awhirling movement. The fan In the drawings:

Fig. 1 is a longitudinal vertical sectional view through a concentrator constructed in accordance with the present invention;

Fig. 2 is a vertical sectional view take on line 2- 2 of Fig. 1;

Fig. 3 is a perspective view of the. portion of the concentrator shown in section in Fig. 2'; and

Fig. 4 is a view-of a detail of the lIlVQn'.

tion to be described.

- The concentrator of the present jinvene tion has a casing 10 which may becylindrical in shape and is shown as supported in a horizontal position. The materials to .be treated are carried into the casing 10 by air, and in the present case a fan 11 5s 10 and is air into t e casing and lengthwise 11 is enclosed by a housing 13 secured to an end wall '14 'of the casing, and the housing preferably flares outwardly toward the cas mg as shown. The air bearin' the materials to be treated is delivered to t e fan housin by a pipe 15 that enters the housing throug an end thereof.

The whirling movement imparted to the air bythe fan serves to throw the heavler particles within the air outwardly by contrifugal force against the wall of the casing 10, and a slot or opening 16 is formed longi the'lower side thereof through which the heavier materials may pass. 1

It is found desirable to protect from the direct path of the air the heavier particles that have been thrown outwardly .'therefrom by centrifugal force, and to arrest their movement longitudinally of the easing and to this end a spiral wall 17 may be provided within the casingl extending 1nwardly from the wall of t e casing. The spiral wall helps to romote whirling movement of the air wit I rects toward said slot the heavier materials that enter between adjacent spirals so that they will escape through the slot 16. It

should be noted that thespiral wall 17 sur- 7 rounds the central o%ening extending longitudinally through t e casing, and that a large portion of the air delivered by the fan 11 will pass lengthwise of the casing the casing," and diwith the heavier particles, and to this end nozzles 18 are mounted adjacent theslot 16 to direct blasts of air against the materials that ap roach the slot to deflect the lighter n cured to ears 20extending outwardly mate'ria s away from the slot. In the present case nozzles are provided for directing a blastof air-inwardly between each pair of coils of the spiral wall 17, and the mouth of each nozzle is flattened out to give the blast of air it delivers a width substantiall egual to the space between the adjacent co' 0 the spiral walL. The nozzles preferably are supported for adjustment relative to the slot 16, and to this end each nozzle 16 may be mounted in a bracket 19 adjustably sefrom a wall of the casing, 10. The brac ts 19 preferably are slotted as shown and are secured to the ears 20 for swinging and sliding adjustment by bolts 21. is supplied to the nozzles by pipes 22 and the volume of air may be controlled by valves 23.

Below the casing 10 are rovided a series" of receptacles 24: preferab y having. partitions 25' arranged so that the materials that escape between different coils of the spiral wall 17 will enter different receptacles, and

ggch receptacle may discharge into a hopper Considerable air may enter the receptacles 24 from the casing 10 and in the present case this airis returned to the fan 11. and is again delivered to the casing 10. To this end in the construction shown, each receptacle has an upwardly extending portion 27 t at the upper end of which is a pipe 28; The pipes 28 communicate with a transversely extending pipe 29 that leadsto the main pipe 15. The heavier materials that .enter the receptacles 24 will move downward therein into the hopper 26, and the air within these receptacles with the lighter particles that may remain therein is zeturned throu h the ipes'28, 29 and 15 to! he 10 or furt or treatment. 30% the plpes 28 may be adjusted to control the flow of air from the receptacles 24.

In the embodiment of the invention shown, the splra'l wall 17 does not extend throu h the entire length of the casing but s rep aced at the left hand portion of the casing by spaced baflie walls 31 having large central opemngls through which the air at the center ,of t e casing passes and escapes through the discharge conduit 32 leading from the delivery end of the container 10.

'The bafile walls 31 serve to retard movement of the air longitudinally of the casing 10,

' inwar treated into'the casing and this gives the heavier particles which still remain in the air an opportunity to settle between the bafiie walls 33 and escape through the slot 16 into the aligned receptacles24.

What is claimed is:

1. A concentrator comprising in combination, a substantially cylindrical casing having a relatively wide discharge slot extend ing longitudinally of aside wall thereof, a fan at one end of said casing for forcing air bearing the materials to be treated centrally through the casing with a longitudinal whirling movement that throws the heavier particles outwardly by centrifugal force through said slot, and an air nozzle for directing a jet of air inwardly through said slot and in a direction to deflect the lighter materials approaching the slot ining a relatively wide discharge slot extend-' ing longitudinally of a side wall thereof, means for forcing air bearing the materials to be treated lengthwise of the casing with a longitudinal whirli movement that throws the heavier particles outwardly by centrifu al force throu' h the slot, an air nozzle or direct a et of air inwardly throng-said slot an in a direction to deflect the li hter materials approaching the slot dly away fromthe slot, and means for supportm the air nozzle in different positions of a justment;

3. A concentrator comprising in combination, a substantially centrifugal casing having a relatively wide discharge slot extending longitudinally of a side wall there of, meansr forcing air bearing the ma terials to be treated lengthwise of the casing with a longitudinalwhirling movement that throws tht heavier particles outwardly by centrifugal force through the slot, and means for directing a jet of air inwardly through said slot at one edge thereof to deflect the lighter materials approaching the slot inwardly away from the slot.

4. A. concentrator comprisin in combination, a' substantially cylin rical casing having a discharge slot-extending lon tudinally of a side wall thereof, means or delivering air bearing the materials to be of to travel central y through the vcasing with a whirling movement that throws the heavier particles outwardly'by centrifugal force, a s iral'wall within the casing encircling t e air passage therethrough and adapted to arrest the heavier particles thrown outwardly b centrifugal force and to direct themto sai slot, and means for direnting a jet of air inwardl adjacent the slot and in a direction to de eat from the slot the. lighter materials approaching the same.

through an end-there 120 5. A concentrator, comprising in combination, a substantial! cylindrical casing having a dischar sot extending longitudinally of a si one end of said. casing for forcin air bearing the materials to be treate oentrall through the casing with a longitudinal whir ing movement that throws the heavier particles outwardly by centrifugal force, and a spiral wall extending inwardly from the wall of the casing to form a ide for directing the heavier materials t at enter between the spirals toward the discharge slot.

6. A concentrator comprising, incombination, a substantially cylindrical casin having a discharge slot extending longitudinally of a wall thereof, a spiral wall extending inwardly from the wall of the casing and surrounding a core forming an air passage centrally through the casing, and means for delivering air carrying the materials to be treated lengthwise through the casing with a spiral whirling movement to cause the e wall thereof, a fan at 7. A concentrator comprising, in combination, a casing having a dischar e slot extending longitudinally thereof, a anfor delivering air bearing the materials to be treated into the casing to travel centrally longitudinally thereof with a whirling movement so that the heavier particles arethrown' outwardly by centrifugal force to pass through the slot, a spiral wall within the casing or promoting whirling movement of the material bearing air and ada ted to receive between the' spirals the eavier materials thrown outwardly by the'whirling movement, and a series of receptacles for receiving the materials discharged through dif: ferent portions of said slot. 1

In testimony whereof, I have signed my name to this specification.

ALBERT H. STEBBINS.

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