Classifications

• • 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
  • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
  • B03D1/00—Flotation
  • B03D1/001—Flotation agents
  • B03D1/004—Organic compounds
  • B03D1/012—Organic compounds containing sulfur
• • 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
  • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
  • B03D1/00—Flotation
  • B03D1/001—Flotation agents
  • B03D1/004—Organic compounds
  • B03D1/008—Organic compounds containing oxygen
• • 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
  • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
  • B03D2201/00—Specified effects produced by the flotation agents
  • B03D2201/02—Collectors
• • 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
  • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
  • B03D2201/00—Specified effects produced by the flotation agents
  • B03D2201/04—Frothers
• • 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
  • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
  • B03D2203/00—Specified materials treated by the flotation agents; Specified applications
  • B03D2203/02—Ores
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S209/00—Classifying, separating, and assorting solids
  • Y10S209/901—Froth flotation; copper

Definitions

• This invention relates to the concentration of minerals, such as sulfid ores and the like, by flotation; and is based upon the discovery that improved results can be obtained by carrying out the flotation operation with the addition to the ore or mineral pulp of a thio-urea compound or substance, 6.
• aromatic thio-urea compounds such as thiocarbanilid or diphenyl-thiourea.
• Thiodarbanilid is a non-oleaginous solid material which can nevertheless be distributed throughout the mineral pulp with such uniformity that minimum amounts are required for promoting the concentration of the minerals by flotation.
• the ore or mineral pulp in any suitable manner, for example, by introducing it into the tube mill in which the ore is being ground, or by digesting it in hot water and mixing the product with the ore pulp just before it enters the fiotation cell, or by dissolving the thiocarbanilid in an organic solvent therefor, or in one of the usual flotation oils or oil mixtures, and incorporating the resulting solution with the ore pulp, or in any other suitable manner which will insure the uniform dissemmation of the thiocarbanilid throughout the pulp.
• Thiocarbanilid has been found to have a marked action as a eollecting agent and can be used to particula advantage in con unction with other flotation agents which have good frothing qualities.
• the thiocarbanilid will supplement the action of such agents by its marked selective collecting properties. So also, the thiocarbanilid can be used to advantage to improve the flotation results obtained with flotation Specification of Letters Patent.
• pine oil which with some ores may have both frothing and selective qualities.
• pine oil which cannot by itself be satisfactorily used with certain ores, such as low grade porphyry ores, can be used with excellent results when thiocarbanilid is also used.
• the resulting mixture is subjected to a flotation operation, as in an ordinary Callow cell, or in apparatus where the air is incorporated in the ore pulp by mechanical agitation.
• the action of the thiocarbanilid is sufficicntly marked so that but a small amount thereof will usually be required, for example, as little as one-tenth or one-twentieth of a pound per ton of ore, although improved results have been obtained with as little as 0.02 pounds per ton of ore and with amounts of as much as 1 pound or more per ton of ore.
• a small fraction of a pound of each agent per ton of ore will usually suffice.
• thiocarbanilid can be improved, with certain ores, for example, withcopper sulfid ores (of the Utah Copper Company) by the addition of alkali, for example, of sodium hydroxid or lime, which may be incorporated with the ore and flotation agent in any suitable manner, as by grinding therewith in the usual mill; and we recommend that an alkali be employed with such ores in an amount, for example, of two pounds of caustic soda per ton of ore. With other ores, for example, zinc ore, good results have been obtained where the ore pulp has been of a neutral character and where no added alkali was employed.
• alkali for example, of sodium hydroxid or lime
• a copper sulfid ore (of the Utah Copper Company) was ground in the usual mill with 02 pounds of thiocarbanilid, and 2. pounds of caustic soda per ton of ore. There was also incorporated with the ore pulp a small amount ofterpineol, about one-twentieth of a pound per ton of ore. The result:
• the amounts of the flotation agents required according to the present invention are so small that the process can be used to advantage where there is no return water circuit. men the return water from the tailings and concentrates is used over again, there is recovered an appreciable amount of the reagent which is available for use in the further carrying out of the process
• the solvent may be one which is'itself a flotation agent and which will contribute to the carrying outof the flotation operation.
• the solvent may, however, be itself of a character such that itdoes not promote the flotation, but solvents should not be used which will have a prejudicial efl'ect thereon.
• the thiocarbanilid may thus, for example, be employed' in solution in; or in admixture with various organic liquids, such as alcohol, or
• aromatic amins such as anilin, xylidin, quinolin, etc.
• I thio-ureas such as ortho-ditolyl-thiourea, 1 para-ditolyl-thiourea, dixylyl-thiourea prepared from mixed xylidins, monophenylthiourea, etc., can similarly be employed, with resulting advantage to the flotation operation.
• the method of efiecting the concentration of mineralsaby flotation which comprises adding to the mineral vvpulp a small amount of a thio-urea substance or compound, and subjecting the resulting mixture to a flotation operation; substantially as de-- scribed.
• the method of effecting the concentration of minerals by flotation which comprises adding to the mineral pulp a small amount of thiocarbanilld, and subjecting the resulting mixture to a flotation operation; substantially as described.
• the method of effecting the concentration ofminerals by flotation which comprises adding to the mineral pulp a small amount of an aromatic thio-urea substance or compound, together with a flotation agent having good frothing qualities, and
• the method of effecting the'concentration of minerals by flotation which comprises adding to the mineral pulp a small amount of thiocarbanilid, together with a flotation agent having good frothing qualities, and subjecting the resulting mixture to for; andsubjecting the resulting mixture to a flotation operation; substantially as described.
• the method of effecting the concentration of copper sulfid oresby flotation which comprises adding to the ore pulp a 7 small amount of thiocarbanilid, together with a small amount of an alkali and of a flotation agent having good frothing qualities,,and subjecting the resulting mixture to a flotation operation; substantially as described.

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• Manufacture And Refinement Of Metals (AREA)
• Physical Water Treatments (AREA)
• Paper (AREA)

Priority Applications (4)

Applications Claiming Priority (3)

Publications (1)

Family

ID=27353302

Family Applications (2)

Family Applications After (1)

Country Status (3)

Cited By (2)

Families Citing this family (7)

• 1919
  • 1919-03-25 US US284981A patent/US1364308A/en not_active Expired - Lifetime
  • 1919-11-11 US US337322A patent/US1364307A/en not_active Expired - Lifetime
• 1920
  • 1920-06-08 FR FR516686A patent/FR516686A/fr not_active Expired
  • 1920-06-18 DE DE1920347750D patent/DE347750C/de not_active Expired

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