US3568832A - Helical ore concentrator - Google Patents

Helical ore concentrator Download PDF

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Publication number
US3568832A
US3568832A US796046A US3568832DA US3568832A US 3568832 A US3568832 A US 3568832A US 796046 A US796046 A US 796046A US 3568832D A US3568832D A US 3568832DA US 3568832 A US3568832 A US 3568832A
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United States
Prior art keywords
groove
chute
band
defining
chutes
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Expired - Lifetime
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US796046A
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English (en)
Inventor
Bo K G Persson
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Trelleborgs Gummifabriks AB
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Trelleborgs Gummifabriks AB
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
    • B03B5/626—Helical separators

Definitions

  • a groove is arranged Fleld ofSearch 1, in the idge-shaped portion
  • a band which may have through 434, 459 holes is inserted in the groove and its projection from the [56] References Cited groove is adjustable.
  • the band serves as an adjustable overflow to enable precise control of the transfer of the liquid from UNITED STATES PATENTS the inner chute to the outer chute at successive portions along 2,431,559 1 1/1947 Humphreys 209/211 the length of the chutes.
  • HELHCAL ORE CONCENTRATOR US. Pat. No. 2,700,469, British Pat. No. 7l8,353 and Swedish Pat. No. 198,704 disclose an ore concentrator which has two chutes running in adjacent parallel relation and helically about a substantially vertical axis, said chutes being interconnected by a ridge-shaped portion and the outer chute being intended for the material to be concentrated which flows downwardly in said chute, while the inner chute is intended for the liquid by means of which concentration is effected and which flows downwardly in said chute and by the centrifugal force is successively transferred to the outer chute.
  • the material to be concentrated is in the form of a suspension of pulverulent or granular material in a liquid, and during the downward flow of the suspension along the helical outer chute there takes place a separation of a concentrate of higher specific gravity.
  • This concentrate is discharged through openings disposed at intervals along the inner edge or lip of the outer chute.
  • the material of the suspension having a lower specific gravity is forced by the wash liquid to flow along the outer edge or lip of the outer chute, and this material gradually is discharged at the lower end of the chute.
  • the object of the present invention is to overcome the above disadvantages and thus to provide a concentrating apparatus which can be set for concentration of various raw materials and which permits adjustment in operation for attaining optimum operating conditions. These desiderata are satisfied by providing in the ridge-shaped portion between the adjacent parallel chutes a groove extending along said chutes, and by inserting into said groove a'bandin the form of one or more parts which partially project from said groove.
  • MG. 1 is a perspective view of approximately one turn of a concentrating apparatus according to the invention.
  • lFlG. 2 is an elevational view of a chute section in said apparatus
  • FIG. 3 is a plan view of the chute section shown in FIG. 2;
  • FlG. 4 is a section on line lV-lV in FIG. 3;
  • F116. 5 is a view of a detail of the apparatus, showing various embodiments of holes therein.
  • the concentrating apparatus has two chutes l0 and 12 running in parallel relationship. These two chutes are interconnected by a ridgeshaped portion 13 and extend helically about a substantially vertical axis.
  • the interconnected chutes 10, 12 are divided into sections 11 each constituting approximately one-third of a turn of the helical chutes.
  • In the outer chute 111 there is an outlet 14 at the lower end of each chute section 11.
  • This outlet 14 is connected by means of a hose 15 to a centrally positioned vertical pipe 16 which serves as a discharge passage for the concentrate separated in the apparatus.
  • the material to be concentrated which is in the form of a suspension, and the wash liquid necessary for the concentration are supplied in a known manner at the upper ends of the chutes 10 and 12, respectively, and flow downwardly along their respective chutes.
  • the chute 12 is so designed that the wash liquid during its downward flow in the chute 12 will successively be transferred to the chute 10 by the centrifugal force. This transfer to the chute 10 can be furthered by the provision in per se known manner of pickups 17 on a level with the outlets 1d.
  • a groove 18 is formed in the ridge-shaped portion 13 between the two chutes 10 and 12. Said groove extends helically as do the two chutes and serves to receive a band 19 which is in one or more parts and partially projects from the groove 18.
  • the band 19 can be solid, but as is the case in the embodiment shown in thedrawings, can also have one or more through holes 20 therein. The configuration of these holes can vary, and FIG. 5 shows some possible hole configurations.
  • the band 19 may be of natural or synthetic rubber, plastic material, sheet metal or any other suitable material.
  • the wash liquid 21 flows downwardly through the inner chute 12, and by the centrifugal force (and also by the intermediary of the pickups 17) the wash liquid flows up along the said wall of the chute 12 onto the upper side of the ridge-shaped portion 13. The wash liquid then flows on the upper side of the portion 13 along the band 19 until the liquid reaches the hole or holes 20.
  • the wash liquid passes through the holes 20 and enters the chute 10 where it flows in a spiral path flushing the material 22 towards the outer wall of the chute 10.
  • the material 22 is divided into a heavy fraction and a lightweight fraction, the heavy fraction flowing downwardly within the inner half of the chute 10 and the lightweight material flowing downwardly along the outer half of the chute 10.
  • the heavy material, the concentrate is discharged from the chute 10 through the aforementioned outlets l4, and to cause the concentrate to flow for sure up to the outlets 14 a guide wall 23 is arranged in the chute 10 on a level with each outlet 14.
  • the band 19 is solid or imperforate the wash liquid on the upper side of the ridge 13 will flow downwardly along the band 19 until it reaches a point of the band where the latter projects from the groove 18 by so small an amount that the liquid can flow over it; the band in this case serves as an overflow.
  • This embodiment of the concentrating apparatus according to the invention is the most advantageous if heavily contaminated water is used as wash liquid, as is often the case in the concentrating plants of mines. For it has shown that impurities in the wash liquid can easily clog the connections between the two chutes in the prior art concentrating apparatus as well as the holes 20, if any, in the band 19.
  • the vertical adjustability of the band 19 it is possible within broad limits to varythe transfer of the wash liquid from the chute 12 to the chute 10, and a still greater number of variations is provided if a perforated band 19 is selected, for in that case variations can also be attained by changing the configuration of the holes 20.
  • the vertical adjustability of the band 19 it is also possible fully to close the supply of wash liquid to the chute 10 at such points where no wash liquid is desired. If the band 19 is solid such closure is realized by pulling the band 1? so far out of the groove 18 that the wash liquid is incapable of flowing over the top edge of the band, and if the band 19 is imperforate the closure is realized by pressing the band so far down into thegroove 18 that the hole or holes 20 will be situated entirely within the groove 18.
  • the band 19 should be divided into such lengths that full adjustability is provided at each outlet 14.
  • the joint proper between the different lengths of the band 19 can be an overlap joint or a butt joint between the band end surfaces.
  • each chute section 11 is formed as a two-layer construction, the inner layer 24 consisting of natural or synthetic rubber and forming the inner side of the chute 10, the ridge 13 and the entire chute 12.
  • the outer layer 25 may be made of for instance reinforced plastic and serve as a supporting structure for the chute 10.
  • the inner layer 24 extends over and downwardly along the end flanges 26 of the section 11 so that upon assembly of the various chute sections the inside of the chute will be formed entirely of rubber.
  • An apparatus for concentrating and separately collecting from a comminuted mass composed of particles having different specific gravities those particles having like specific gravity comprising two chutes (10, 12) running in adjacent parallel relation and helically about a substantially vertical axis, a ridge-shaped portion (13) extending between and interconnecting said chutes, said outer chute (10) being adapted to carry a stream of liquid having therein the material to be concentrated and said inner chute (12) being adapted to carry a stream of liquid by means of which concentration is to be effected and which flows downwardly in said inner chute and by the centrifugal force is successively transferred to said outer chute, means defining a groove (18) in said ridge-shaped portion (13) between the adjacent parallel chutes (l0, 12), said groove-defining means extending along said ridge-shaped portion, band means (19) inserted for vertical adjustment in the groove (18) in said groove-defining means, said band means having at least one part which partially projects from the groove in said groove-defining means, and drawoff outlets (14) in the bottom of said outer chute

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  • Centrifugal Separators (AREA)
  • Scissors And Nippers (AREA)
US796046A 1968-02-09 1969-02-03 Helical ore concentrator Expired - Lifetime US3568832A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1718/68A SE308493B (enrdf_load_stackoverflow) 1968-02-09 1968-02-09

Publications (1)

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US3568832A true US3568832A (en) 1971-03-09

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US796046A Expired - Lifetime US3568832A (en) 1968-02-09 1969-02-03 Helical ore concentrator

Country Status (5)

Country Link
US (1) US3568832A (enrdf_load_stackoverflow)
FI (1) FI48043C (enrdf_load_stackoverflow)
FR (1) FR2001638A1 (enrdf_load_stackoverflow)
NO (1) NO118666B (enrdf_load_stackoverflow)
SE (1) SE308493B (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4059506A (en) * 1975-05-23 1977-11-22 United States Steel Corporation Ore tailings treatment
US4476980A (en) * 1981-03-18 1984-10-16 Mineral Deposits Limited Spiral separator
US4563279A (en) * 1981-07-03 1986-01-07 Wright Douglas C Spiral separators
US4597861A (en) * 1983-04-13 1986-07-01 Mineral Deposits Limited Spiral separator
US4795553A (en) * 1981-03-26 1989-01-03 Mineral Deposits Limited Spiral separator
US5452805A (en) * 1994-02-02 1995-09-26 Carpco, Inc. Spiral separator
US6527125B2 (en) * 2001-06-15 2003-03-04 Outokumpu Oyj Washing liquid distribution system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431559A (en) * 1943-04-10 1947-11-25 Humphreys Invest Company Helical chute concentrator and the method of concentration practiced thereby
US2431560A (en) * 1944-08-21 1947-11-25 Humphreys Invest Company Helical chute concentrator
US2700469A (en) * 1952-07-14 1955-01-25 Humphreys Invest Company Wash water pickup for spiral concentrator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431559A (en) * 1943-04-10 1947-11-25 Humphreys Invest Company Helical chute concentrator and the method of concentration practiced thereby
US2431560A (en) * 1944-08-21 1947-11-25 Humphreys Invest Company Helical chute concentrator
US2700469A (en) * 1952-07-14 1955-01-25 Humphreys Invest Company Wash water pickup for spiral concentrator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4059506A (en) * 1975-05-23 1977-11-22 United States Steel Corporation Ore tailings treatment
US4476980A (en) * 1981-03-18 1984-10-16 Mineral Deposits Limited Spiral separator
US4795553A (en) * 1981-03-26 1989-01-03 Mineral Deposits Limited Spiral separator
US4563279A (en) * 1981-07-03 1986-01-07 Wright Douglas C Spiral separators
US4597861A (en) * 1983-04-13 1986-07-01 Mineral Deposits Limited Spiral separator
US5452805A (en) * 1994-02-02 1995-09-26 Carpco, Inc. Spiral separator
US6527125B2 (en) * 2001-06-15 2003-03-04 Outokumpu Oyj Washing liquid distribution system

Also Published As

Publication number Publication date
FI48043C (fi) 1974-06-10
NO118666B (enrdf_load_stackoverflow) 1970-01-26
SE308493B (enrdf_load_stackoverflow) 1969-02-17
FI48043B (enrdf_load_stackoverflow) 1974-02-28
FR2001638A1 (enrdf_load_stackoverflow) 1969-09-26

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