US2745547A - Jigging process for beneficiation of potassium containing ores - Google Patents

Jigging process for beneficiation of potassium containing ores Download PDF

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Publication number
US2745547A
US2745547A US302780A US30278052A US2745547A US 2745547 A US2745547 A US 2745547A US 302780 A US302780 A US 302780A US 30278052 A US30278052 A US 30278052A US 2745547 A US2745547 A US 2745547A
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langbeinite
sylvite
particles
pulp
ore
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US302780A
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English (en)
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Edgar E Wrege
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International Minerals and Chemical Corp
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International Minerals and Chemical Corp
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Priority to US302780A priority Critical patent/US2745547A/en
Priority to ES0210755A priority patent/ES210755A1/es
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/02Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
    • B03B5/10Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs
    • B03B5/12Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs using pulses generated mechanically in fluid
    • B03B5/18Moving-sieve jigs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/02Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
    • B03B5/10Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs

Definitions

  • the present invention relates to a process for the beneficiation of potash minerals. More particularly, the instant invention relates to a process for the beneficiation of potash minerals by a jigging process.
  • jig applies to a machine for classifying materials of difierent specific gravity by the pulsation of a stream of liquid fiowing through a bed of material.
  • the potash ores mined and-refined in the area near Carlsbad, New Mexico, are sylvinite ore, containing sylvite and halite; langbeinite ores, containing langbeinite and halite; and a mixed ore, containing sylvinite and langbeinite ores.
  • sylvinite ore containing sylvite and halite
  • langbeinite ores containing langbeinite and halite
  • a mixed ore containing sylvinite and langbeinite ores.
  • the present invention in part, relates to the combination of a jigging process for the separation of mixed ore into a high grade langbeinite ore and a sylvite-containing fraction with processes now in operation for the treatment of sylvite-containing material.
  • Langbeinite and sylvite are the final products recovered from the mixed ore.
  • the degree of separation is proportional to 2.83-1.00 O 1.83 2.00-1.00 yr 1.00
  • the degree of separation is proportional to 2.831.34 r g r 2.26 2.00-1.34 0.66 1.00
  • the medium should have an apparent gravity of between about 1.3 and about 2.0, preferably between about 1.6 and about 2.0.
  • the, mixed ore is admixed with an aqueous brine in which the ore constituents will not dissolve under the prevailing conditions. It has been found that a reject liquor from sylvitelangbeinite base exchange processes to which sylvite has been added until the brine is saturated with respect'to sylvite, is a preferred high density brine having a specific gravity of about 1.34.
  • the above mentioned brine has a higher density than brines prepared from sylvinite which are employed in flotation and other conventional potash beneficiation processes.
  • Mixed ore brine which refers to an aqueous solution prepared from a mixture of langbeinite and sylvinite ores, and which is saturated .with respect to sylvite and halite at the temperature of operation, is another brine which may be employed.
  • the brine likewise has a specific gravity, when free of suspended solids, about the same as the above-mentioned reject liquor saturated with sylvite.
  • These brines are hereafter referred to in the description and claims as high density brines.
  • the slurry density of the resulting pulp is between about 40% and about 70% solids by weight, preferably between about 50% and about 60% solids by Weight.
  • the pulp is then subjected to the action of a jig.
  • any type of commercially available jig may be employed in practicing the instant invention, however, the Jeffrey Baum jig in which the separation takes place on the down stroke is preferred.
  • the preferred design of the jig is an all-hutch jig, although a combination draw and hutch jig can be employed.
  • the jig may be of one compartment but one of three or four compartment design is preferred.
  • a three compartment jig is employed.
  • the concentrate from the first compartment comprises essentially langbeinite and some halite.
  • the concentrate is subjected to classification in order to separate the brine from the crude langbeinite.
  • This crude longbeinite is then water washed to remove the halite.
  • the washed langbeinite fraction contains between about 85% and about 95% of the longbeinite present in the feed.
  • the overflow from the first compartment of the jig is conducted to the second compartment of the jig.
  • the longbeinite which was not recovered in the first compartment is recovered in the second compartment, for example, as the hutch product.
  • This fraction may contain a substantial amount of sylvinite depending upon the degree of liberation of sylvite and halite.
  • This fraction if desired can be further comminuted to liberate the langbeinite from the sylvite and the halite and recycled through the jig.
  • the third compartment of the jig results in the recovery of any longbeinite escaping the second compartment while the overflow from the third compartment contains mainly sylvite and halite.
  • This product is subjected to any conventional froth flotation operation to recover sylvite therefrom.
  • a fourth compartment is employed, it is possible to obtain an overflow which is principally high grade sylvite.
  • the comminuted mixed ore 1 having a mesh size of about x mesh is pulped with a brine stream 3 containing fine langbeinite (48 mesh) and suflicient clarified high density brine 2 in pulp box 4 in which the mixture is vigorously agitated to obtain uniformity of composition.
  • Suflicient brine is added to obtain a slurry density of between about 40% and about 70% solids by weight.
  • the pulp 5 passes from the pulp box 4 to the three compartments of jig 6.
  • Suflicient additional clear brine 7 is added to the jig at this point to convey the solids through the jig under conventional operating conditions and proper pulp densities.
  • the fre quency of the jig stroke and the pulsations employed depend on the quality and particle size of the feed material.
  • a concentrate 8 containing largely langbeinite and some halite is recovered as the hutch produce of the first compartment.
  • Concentrate 8 is subjected to dewatering at station 9 in order to separate brine 10 from crude langbeinite 11.
  • the crude dewatered langbeinite product 11 which analyzes between about 80% and about 90% langbeinite and represents between about 85% and about 95% recovery of langbeinite from the feed, is conducted to langbeinite refining operation 12 where high grade langbeinite is produced by water washing the halite from the langbeinite. If desired or deemed advantageous, part of the langbeinite recovered can be comminuted and recycled to pulp box 4 to increase the apparent specific gravity of the liquid medium to the desired degree.
  • the overflow from the first compartment of the jig 6 is treated in the second compartment for recovery of unliberated langbeinite.
  • the langbeinite is not recovered in the first compartment is recovered in the second com- 4 partment as the hutch product 13.
  • This produce 13 contains considerable halite and after dewatering at station 14 is ground in comminutor 15 to liberate the langbeinite from the halite and sylvite.
  • the comminutor discharge is recycled with brine 23 to the pulp box 4 and then reintroduced to the first compartment of jig 6.
  • the third compartment of jig 6 recovers any unrecovered langbeinite escaping the second compartment.
  • Hutch product 16 from the third compartment can be processed with the hutch middling product 13 from the second compartment if the langbeinite content is appreciable, or product 16 can be combined with 'syvinite overflow product 17 from the third compartment if the sylvite content of product 16 is appreciable.
  • the sylvinite overflow 17 from the third compartment is subjected to dewatering at station 18 and the crude sylvinite so separated then conducted to a flotation section 19 where sylvite is recovered by standard flotation practice.
  • a flotation section 19 where sylvite is recovered by standard flotation practice.
  • the overflows from the dewatering stations 9, 14 and 18 which stations may employ rake or spiral classifiers or dewatering drags, are clarified of suspended slimes in thickener 20.
  • the overflow 21 of the thickener 20 is conducted to storage 22 from which it is pumped to the desired points in the process.
  • EXAMPLE A feed material of deslimed ore containing langbeinite and sylvinite sized to about to 0 mesh was pulped with mixed ore brine saturated with respect to sylvinite in suflicient amount to produce a slurry density of about 50% solids by weight. After thorough wetting of the particles, suflicient brine was added to obtain a slurry density of between about 15% and about 20% solids by weight. The pulp was then fed to a Jeflery Baum jig having 3 jigging'compartments in series. The hutch products from the second and third compartments were recycled, the product being that obtained from the hutch of the first compartment.
  • the following table shows the weight per cent of langbeinite, sylvite and halite in the feed and in the products recovered. The recovery of langbeinite was about and of sylvite about 98%. The total K20 recovery was about 94%.
  • a process for the beneficiation of mixed ores containing langbeinite and sylvinite which comprises preparing a pulp of comminuted ore particles, suspending said comminuted ore particles in high density brine containing ore particles too finely divided to be separated during processing and in sufiicient quantity to produce a medium having an apparent specific gravity above 1.3, but below 2.0, subjecting the resulting pulp to a jigging operation, and separately collecting a langbeinite enriched fraction and a sylvite enriched fraction therefrom.
  • a process for the beneficiation of mixed ores containing langbeinite and sylvinite which comprises comminuting the ore to substantially completely liberate the particles, preparing a pulp of the comminuted ore particles to be separated, suspended in a high density brine in which finely divided langbeinite particles substantially unseparated during processing and substantially insoluble are maintained in sufficient amount in the brine to produce an apparent specific gravity above 1.3, but below 2.0, subjecting said pulp to a jigging operation and separately collecting a langbeinite enriched fraction and a sylvite enriched fraction therefrom.
  • a process for the beneficiation of mixed ores containing langbeinite and sylvinite which comprises preparing a pulp of the comminuted ore particles in high density brine, adding to the pulp langbeinite particles smaller than about 48 mesh in sufiicient quantity to produce an apparent specific gravity above 1.3, but below 2.0, in the brine, subjecting the resulting pulp to a jigging operation in which the separation of the langbeinite particles from the sylvite particles takes place primarily on the suction stroke, and separately collecting a langbeinite enriched fraction and a sylvite enriched fraction therefrom.
  • a process for the beneficiation of mixed ores containing langbeinite and sylvinite which comprises comminuting the ore to substantially completely liberate the langbeinite and the sylvite particles, desliming said comminuted ore, preparing a pulp of the deslimed ore particles suspended in sutficient high density brine in which the ore particles are substantially insoluble to produce a pulp of a solids density of between about 40% and about 70%, adding to the resulting pulp sufficient langbeinite particles smaller than about 48 mesh to produce an apparent specific gravity above 1.3, but below 2.0 in the resulting brine, subjecting the resulting pulp to a jigging operation in which the separation of the langbeinite particles from the sylvite particles takes place largely on the suction stroke, and collecting a langbeinite enriched fraction therefrom.
  • a process for the beneficiation of mixed ores containing langbeinite and sylvinite which comprises comminuting the ore to substantially completely liberate the sylvite and langbeinite particles, preparing a pulp of the comminuted ore particles with a high density brine in which the ore particles are substantially insoluble, adding langbeinite particles which are smaller than about 48 mesh to the pulp in sufiicient quantity to produce an apparent specific density above 1.3, but below 2.0 in the brine, subjecting the resulting pulp to the action of a primary jigging operation in which the separation of the langbeinite particles from sylvite particles takes'place on the suction stroke, collecting a langbeinite enriched fraction, subjecting the fraction containing sylvite particles which overflows from the primary jig compartment to a secondary jigging operation in which the separation of additional quantities of langbeinite particles from sylvite particles takes place on the suction stroke, and to separately collect a langbeinite enriched fraction and
  • a process for the beneficiation of mixed ores containing langbeinite and sylvinite which comprises comminuting the ore to substantially completely liberate the sylvite and langbeinite particles, preparing a pulp of the comminuted ore particles suspended in a medium having an apparent density above 1.3, but below 2.0, subjecting the resulting pulp to the action of a primary jigging operation in which the separation of the langbeinite particles from sylvite particles takes place on the suction stroke, collecting a langbeinite enriched fraction, subjecting the fraction containing sylvite particles which overflows the primary jig to a secondary jigging operation in which the separation of additional quantities of langbeinite particles from sylvite particles takes place on the suction stroke, collecting a second langbeinite enriched fraction and a sylvite enriched fraction therefrom, conducting the sylvite enriched fraction to a third jigging operation in which the separation of the heavier particles takes place on
  • a process for the beneficiation of mixed ores containing langbeinite and sylvinite which comprises comminuting the ore to substantially completely liberate the constituents of the ore, preparing a pulp of ore particles suspended in sufiicient high density brine in which the ore particles are substantially insoluble, to produce a pulp of solids density of between about 40% and about adding sufiicient langbeinite particles having a mesh size smaller than about 48 to the pulp to produce an apparent specific gravity above 1.3, but below 2.0 in the resulting brine, subjecting the resulting pulp to a primary jigging operation in which the separation of langbeinite particles from a sylvite enriched fraction takes place on the suction stroke, collecting a langbeinite enriched fraction, subjecting the fraction containing sylvite particles from the primary jig to a secondary jigging operation in which the separation of additional quantities of langbeinite particles takes place on the suction stroke, and separately separating a langbeinite enriched fraction and a
  • a process for the beneficiation of mixed ores containing langbeinite and sylvinite which comprises comminuting the ore to substantially completely liberate the sylvite and langbeinite particles, preparing a pulp of the comminuted ore particles suspended in sufiicient high density brine in which the ore particles are substantially insoluble to produce a slurry density of between about 40% and about 70% solids by weight, adding sufiicient langbeinite particles having a mesh size smaller than about 48 to the pulp to produce an apparent specific gravity above 1.3, but below 2.0 in the resulting brine, subjecting the resulting pulp to the action of a primary jigging operation in which the separation of the langbeinite particles from the sylvite particles takes place on the suction stroke, separately collecting a langbeinite enriched frac tion and a sylvite enriched fraction, subjecting the sylvite enriched fraction to a secondary jigging operation to produce a second langbeinite enriched fraction and

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  • Mechanical Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
US302780A 1952-08-05 1952-08-05 Jigging process for beneficiation of potassium containing ores Expired - Lifetime US2745547A (en)

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US302780A US2745547A (en) 1952-08-05 1952-08-05 Jigging process for beneficiation of potassium containing ores
ES0210755A ES210755A1 (es) 1952-08-05 1953-08-04 Un procedimiento rra el beneficio de minerales mixtos

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2950007A (en) * 1957-03-18 1960-08-23 American Metal Climax Inc Concentration of potash ores
US3002616A (en) * 1958-03-05 1961-10-03 Int Minerals & Chem Corp Potash ore beneficiation process
US3017661A (en) * 1959-03-16 1962-01-23 Meat Separator Corp Method for separation of meat and bone
US4488958A (en) * 1982-12-20 1984-12-18 Cargill, Incorporated Method of preparing highly purified kiln dried solar salt

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2194139A (en) * 1938-03-07 1940-03-19 Link Belt Co Trough washer
US2214206A (en) * 1938-10-15 1940-09-10 Pacific Coast Borax Company Method of separating soluble ores by hindered settling separation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2194139A (en) * 1938-03-07 1940-03-19 Link Belt Co Trough washer
US2214206A (en) * 1938-10-15 1940-09-10 Pacific Coast Borax Company Method of separating soluble ores by hindered settling separation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2950007A (en) * 1957-03-18 1960-08-23 American Metal Climax Inc Concentration of potash ores
US3002616A (en) * 1958-03-05 1961-10-03 Int Minerals & Chem Corp Potash ore beneficiation process
US3017661A (en) * 1959-03-16 1962-01-23 Meat Separator Corp Method for separation of meat and bone
US4488958A (en) * 1982-12-20 1984-12-18 Cargill, Incorporated Method of preparing highly purified kiln dried solar salt

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ES210755A1 (es) 1953-12-16

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