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Publication numberUS2298016 A
Publication typeGrant
Publication dateOct 6, 1942
Filing dateMar 29, 1941
Priority dateMar 29, 1941
Publication numberUS 2298016 A, US 2298016A, US-A-2298016, US2298016 A, US2298016A
InventorsLincoln Charles S
Original AssigneeAllis Chalmers Mfg Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Rotary scrubber and method of scrubbing ore
US 2298016 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Qct.'6,,1942- c; 5. mm 2,298,016

ROTARY SCRUBBER AND METHOD OF scnusame ORE" i neduarcn 29, 1941 Patented Oct. 6, 1942 UNITED STATES PATENT orrrcs ROTARY SCRUBBER AND METHOD OF SCRUBBIN G ORE Charles S. Lincoln, Wauwatosa, Wis., assignor to Allis-Chalmers Manufacturing Company, Milwaukee, Wis., a corporation of Delaware Application March 29, 1941, Serial No. 385,791

5 Claims.

This invention relates to rotary ore, stone or gravel washers or scrubbers and to a method of scrubbing such materials, and is particularly adapted for the removal of adherent clayey material from various gravels or ores.

Among the objects or this invention are to provide a rotary scrubber for efficiently scrubbing gravel and ore; to provide a scrubber with countercurrent flow of. ore and washing liquid and in which the ore at the feed end of the drum projects upward beyond the level of the liquid at the feed end; to provide a scrubber in which lifting ribs are utilized to raise the ore and shower it down to impact other ore which projects upward beyond the level of the fluid; and to provide a method involving the maintenance of ore at a higher level than the liquid at the feed end of a countercurrent rotary scrubber, while showering ore on the projecting mass of ore.

Other objects will appear from the following description taken in conjunction with the drawing, wherein Fig. 1 is a central vertical section of a scrubber constructed in accordance with this invention; and Fig. 2 is a sectional view taken along line II-II of Fig. 1.

The scrubber of this invention comprises a rotary drum II) which may be lined as shown at II. The drum I is shown as being supported on two end trunnions l2, l3, and may be rotated by any known means, not shown. Interiorly of the drum and adjacent the feed end are arranged a plurality of helical ribs l5 which may extend throughout the length of the drum. In the particular structure disclosed, the helical ribs are limited to the feed end of the drum, the remainder of the drum being provided with longitudinal ribs IS. The ore, gravel, stone, etc., hereinafterreferred to as ore," is conducted into the drum at the feed end by spout I! which passes through feed trunnion l2. The feed trunnion is provided with an annular grate or grid l8 for retaining a desired level of ore at the feed end of the drum while permitting discharge of washing fluid therethrough. .The discharge end of the drum is provided with a central opening I 9, the diameter of which is intermediate the diameter of the feed trunnion opening and the central aperture in grid l8.

A cylindrical screen or trommel 22 is carried a by the discharge trunnion 13, the material passing through the cylindrical screen entering hopper 23,'-while the oversize passes into duct 24. A pipe 25 carrying water or other washing liquid passes through trunnion I 3 and discharges washin the drum adjacent the discharge end thereof.

As illustrated, rotary drum l0 issubstantially horizontal. Since the inner edge of grid l8, de-

termined by aperture 20, is at a higher elevation than the edge of opening l9 at the discharge end of the drum, a gradient of ore within the I drum is established, and the ore gradually passes from the feed and to the discharge end, being scrubbed of its adherent material as it passes through the drum. While grid I8 retains the ore at the feed end of the drum, it permits water to pass therethrough. Since the opening in the feed trunnion i2 is larger in diameter than the discharg opening l9, washing fluid or water will flow countercurrent to the path of the material and will be discharged at the feed end of the drum, where it is carried away by launder 26.

Due to the presence of grid l8 at the feed end of the drum, the level of ore within the drum at the feed end is higher than the water level therein, which is determined by the periphery of the grid. Therefore, material which is elevated by ribs l5 and showered down during rotation of the drum is caused 'to fall on and impact the projecting bed of ore without its fall being broken by liquid in the drum. This aids in separating the adherent material from the ore. The lifting ribs I5 are shown as being helical adjacent the feed end in order to expedite the removal of the material from the feed trunnion. It is usually not necessary to make the lifting ribs helical throughout the length of the drum, since the ore should be permitted to remain within the drum long enough to be washed of its adherent clay. During its passage through the body of the drum, the ore is thoroughly separated from the material adhering thereto. While some ore at the feed end projects beyond the level of the liquid in the drum, the scrubber of the invention insures the presence of a. minimum amount of washing fluid within the drum at all times. 1

While a specific embodiment has been disclosed, it is obvious that the method may be practiced with any other structure provided that the level of ore at the feed end of the mill is maintained at a higher elevation than the level of water passing through the ore countercurrent to the flow of the ore. Preferably some means should be 'providedfor lifting and showering some of the ore upon that portion of the ore projecting out of the liquid.

It is claimed and desired to secure by Letters Patent:

ing fluid within the cylindrical screen and with- 1. A scrubber comprising a rotatable substantially horizortal imperiorate drum having a feed end and a discharge end, means at said feed end limiting the maximum level of ore therein and preventing the discharge of ore at said feed end, a second means at said feed end for maintaining the level or liquid therein above the bottom of said drum, said maximum liquid level being lower than said maximum ore level, and a third means at said discharge end for determining the maximum level of both are and liquid therein, said discharge end maximum level being intermediate the maximum liquid and ore levels at said ieed end.

2. A scrubber comprising a substantially horizontal rotatable imperforate drum having a feed end and a discharge end, means for feeding ore into the drum at said feed end, gravity overflow means for discharging treated material from said discharge end, means for maintaining a gradient of ore sloping downward from the feed end to the discharge end, means for admitting washing liquid into said drum adjacent the discharge end, means for discharging said washing liquid adjacent said feed end and at a level spaced from the lowest portion of said drum at said feed end, and means for maintaining the normal level oi ore adjacent the feed end above the maximum liquid level at said feed end and preventing the discharge of ore at said feed end.

3. A scrubber comprising an impertorate rotatabledrum having a feed end and a discharge end, a central aperture adjacent the feed end,

an annular grid extending inward within sai aperture and provided with a central passage; and a central aperture adjacent said discharge end, the diameter of said discharge aperture being intermediate the diameter of said feed end aperture and said grid passage; helical lilting ribs within said'drum adjacent said feed end, and longitudinal lifting ribs within the intermediate portion 0! said drum.

4. A scrubber comprising an imperiorate rotatable drum having a feed end and a discharge end, an imperiorate wall adjacent the feed end provided with a central aperture, an, annular grid extending inward within said aperture and provided with a central passage: and an imperforate wall adjacent said discharge end provided with a central aperture, the diameter of said discharge aperture being intermediate the diameter 01 said feedend aperture and said grid passage, and lifting ribs within said drum adjacent said i'eed end.

5. A scrubber comprising an imperforate rotatable drum having a feed end and a discharge end, an imperiorate wall adjacent the feed end provided with a central aperture, an annular grid within said aperture and provided with a central passage; and an imperforate wall adjacent said discharge end provided with a central aperture, the diameter of said discharge aperture being intermediate the diameter of said feed end aperture and said grid passage.

CHARLES S. LINCOLN.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2421345 *Nov 4, 1944May 27, 1947Kenneth E McconnaughayMixer
US2450980 *Aug 24, 1945Oct 12, 1948Ernest Moyer GeorgeScrubber for removing dirt from aggregates such as sand and gravel
US2630301 *Nov 16, 1950Mar 3, 1953Lentz Kendrick WRotary elastic drum blender
US2698089 *Jun 24, 1949Dec 28, 1954Inter State Iron CompanyOre testing system
US2705620 *Jun 30, 1951Apr 5, 1955Separator AbMethod and apparatus for mixing fluids insoluble in one another
US2899176 *Jan 22, 1958Aug 11, 1959 Heat exchanger
US2983489 *May 9, 1958May 9, 1961Patchen Roy RMixing and delivering apparatus
US3014315 *Apr 15, 1960Dec 26, 1961 Gravel washer
US3062511 *Mar 16, 1960Nov 6, 1962Armstrong Cork CoContinuous blender
US3384002 *Nov 7, 1966May 21, 1968Johnson Co GordonApparatus for defrosting food products
US3451375 *Jan 3, 1967Jun 24, 1969A Wander Sa DrRotating drum coating apparatus
US4018567 *Mar 31, 1975Apr 19, 1977James P. La Point, Jr.Apparatus for separating the constituents of lead-acid storage batteries
US4291503 *Sep 5, 1979Sep 29, 1981Yasunaga HigashiWorkpiece treating barrel
US4385997 *Jan 21, 1980May 31, 1983Reed Ltd.Method and apparatus for preconditioning laminated paper for recycling
US4406783 *Nov 19, 1981Sep 27, 1983Cleland Keith BApparatus for separating ore
US4522711 *Oct 6, 1983Jun 11, 1985Cleland Keith BOre separator apparatus
US4561973 *Oct 9, 1984Dec 31, 1985Cleland Keith BOre concentrator pad assembly
US4911554 *Dec 16, 1987Mar 27, 1990Heinrich HenneRotatable drum
US5373946 *Dec 21, 1992Dec 20, 1994Olivier; Paul A.System for media separation of solid particles
US5470146 *Dec 27, 1991Nov 28, 1995Standard Havens, Inc.Countercurrent drum mixer asphalt plant
Classifications
U.S. Classification209/452, 366/227, 366/183.1, 366/135, 366/175.1, 241/176
International ClassificationB03B5/00, B03B5/56
Cooperative ClassificationB03B5/56
European ClassificationB03B5/56