US1972247A - Concentration of oxidized minerals - Google Patents

Concentration of oxidized minerals Download PDF

Info

Publication number
US1972247A
US1972247A US545838A US54583831A US1972247A US 1972247 A US1972247 A US 1972247A US 545838 A US545838 A US 545838A US 54583831 A US54583831 A US 54583831A US 1972247 A US1972247 A US 1972247A
Authority
US
United States
Prior art keywords
ore
pulp
dithiocarbamate
froth flotation
sodium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US545838A
Inventor
Ralph E Sayre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
American Smelting and Refining Co
Original Assignee
American Smelting and Refining Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Smelting and Refining Co filed Critical American Smelting and Refining Co
Priority to US545838A priority Critical patent/US1972247A/en
Application granted granted Critical
Publication of US1972247A publication Critical patent/US1972247A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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 ores and has for an object the provision of an improved process for concentrating oxidized ores.
  • the present invention is based on my discovery that substances belonging to the class of compounds known as dithiocarbamates may be employed effectively in the concentration of oxidized ores by froth flotation.
  • Dithiocarbamates and their salts such, for example, as their alkali metal salts may be employed in carrying out the process of the invention.
  • Dithiocarbamates for use in carrying out the process of the invention may be prepared in any suitable manner.
  • ient procedure for preparing such compounds consists in adding an alkali metal sulphide to a mixture of carbon bisulphide and an amine.
  • sodium a-naphthyl-dithiocarbamate may be prepared by adding sodium sulphide to a mixture of a-naphthylamine and carbon bisulphide.
  • the reaction product in solid form, it is usually desirable to treat the reaction mixture with ether or with some other solvent in which the dithiocarbamate is but slightly soluble. It is not necessary for the purposes of the present invention to isolate the dithiocarbamate from the reaction mixture Thus, in the practice of the present invention, the dithiocarbamates may be used as crude reaction products without being isolated from the reaction mixture.
  • the alkali and alkylammonium salts of substituted dithiocarbamic acids are in general readily soluble in water and alcohol.
  • the heavy metal salts (such as lead, zinc, iron, etc. salts) may be obtained as precipitates by treating the dissolved dithiocarbamates (such as the alkali and alkylammonium dithiocarbamates) with a dissolved salt of the heavy metal.
  • lead phenyl dithiocarbamate is produced by mixing solutions of lead acetate and potassium phenyl dithiocarbamate.
  • the heavy metal dithiocarbamates are only sparingly soluble even in hot water.
  • the process of the invention is particularly suitable for the concentration of ores containing silicate and carbonate minerals.
  • the amount of reagent required is from about 0.5 to about 2.0 pounds per ton of dry ore.
  • a frothing agent such, for example, as
  • the reagents may be incorporated in the flotationpulp at any suitable stage of the flotation operation, or they may be added prior to the final wet grinding operation.
  • Relatively pure com- In general, the most conven-' pounds or products of reactions designed to produce such compounds may be added to the pulp directly or in solution in suitable solvents.
  • water soluble compounds such as sodium a-naphthyl-dithiocarbamate may be employed in the form of concentrated aqueous solutions.
  • a filming agent such as sodium sulphide is sometimes desirable, and it is preferably added in successive portions at or immediately preceding the times at which the thiocarbamate additions are made.
  • neutral and alkaline pulps may be employed.
  • a slime-conditioning agent such as lime or sodium silicate is advantageous. Such agents may be added, conveniently, prior to the final wet grinding of the ore.
  • Example I A 500 gram sample of Mason Valley copper ore containing practically all of its copper in the form of malachite and chrysocolla was ground with water to produce a pulp in which 89.4 percent of the particles were minus 200 mesh. The resulting pulp was subjected to a froth flotation operation for a period of 20 minutes in a Janney laboratory flotation machine.
  • Example II A 500 gram sample of Copper Basin copper ore containing practically all of its copper in the form of malachite and chrysocolla was ground with water to produce a pulp in which 85.2 percent of the particles were minus 200 mesh. The resulting pulp was subjected to a froth flotation operation for a period of 15 minutes in a Janney laboratory flotation machine.
  • Example IV A 500 gram sample of Utah Copper Company copper ore containing practically all of its copper in the form of malachite and azurite was ground with water to produce a pulp in which 75.2 percent of the particles were minus 200 mesh. The resulting pulp was subjected to a froth flotation operation for a period of 15 minutes in a Janney laboratory flotation machine.
  • Example V Another 500 gram sample of the Utah Copper Company ore, in a pulp corresponding to that employed in Example IV, was subjected to a similar Reagents Lbs. per tan 0! dry ore Sodium a-naphthyl-dithiocarbamate- 2. 0 Lime 0H),) 0.3 Pine Oil 0. 14
  • Example VI A third 500 gram sample of the Utah Copper Company ore, in a pulp corresponding to'that employed in Example IV, was subjected to a similar flotation operation for a period of 20 minutes in the absence of sulphide and in the presence of sodium silicate and an increased amount of sodium a-naphthyl-dithiocarbamate.
  • Example VII A 500 gram sample of Yellow Pine lead ore containing practically all of its lead in the form of cerussite was ground with water to produce a pulp in which 89.2 percent of the particles were minus 200 mesh. The resulting pulp was subjected to a froth flotation operation for a period of 15 minutes in a Janney laboratory flotation machine.
  • the process'of concentrating oxidized ore which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of sodium a-naphthyl-dithiocarbamate.
  • the process of concentrating oxidized ore containing the mineral malachite whch comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of sodium a-naphthyl-dithiocarbamate.
  • the process of concentrating ores of the type of oxidized lead and oxidized copper ores which comprises. subjecting the ore in the form of a pulp to a froth flotation operation in the presence of a sulphide filming agent and about 0.5 to 2.0 pounds of a dithiocarbamate per ton of dry ore.

Landscapes

  • Paper (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

Patented Sept. 4, 1934 UNITED STATES 1,972,247 CONCENTRATION OF OXIDIZED MINERALS Ralph E. Sayre, Middlesex County, N. J., assignor to American Smelting & RefiningCompany, a corporation oi. New Jersey No Drawing.
Application June 20, 1931,
Serial No. 545,838
29 Claims.
This invention relates to the concentration of ores and has for an object the provision of an improved process for concentrating oxidized ores.
The present invention is based on my discovery that substances belonging to the class of compounds known as dithiocarbamates may be employed effectively in the concentration of oxidized ores by froth flotation. Dithiocarbamates and their salts such, for example, as their alkali metal salts may be employed in carrying out the process of the invention.
Dithiocarbamates for use in carrying out the process of the invention may be prepared in any suitable manner.
ient procedure for preparing such compounds consists in adding an alkali metal sulphide to a mixture of carbon bisulphide and an amine.
Thus, for example, sodium a-naphthyl-dithiocarbamate may be prepared by adding sodium sulphide to a mixture of a-naphthylamine and carbon bisulphide.
In order to obtain the reaction product in solid form, it is usually desirable to treat the reaction mixture with ether or with some other solvent in which the dithiocarbamate is but slightly soluble. It is not necessary for the purposes of the present invention to isolate the dithiocarbamate from the reaction mixture Thus, in the practice of the present invention, the dithiocarbamates may be used as crude reaction products without being isolated from the reaction mixture.
The alkali and alkylammonium salts of substituted dithiocarbamic acids are in general readily soluble in water and alcohol. The heavy metal salts (such as lead, zinc, iron, etc. salts) may be obtained as precipitates by treating the dissolved dithiocarbamates (such as the alkali and alkylammonium dithiocarbamates) with a dissolved salt of the heavy metal. Thus, for example, lead phenyl dithiocarbamate is produced by mixing solutions of lead acetate and potassium phenyl dithiocarbamate. In general, the heavy metal dithiocarbamates are only sparingly soluble even in hot water.
The process of the invention is particularly suitable for the concentration of ores containing silicate and carbonate minerals. In general, the amount of reagent required is from about 0.5 to about 2.0 pounds per ton of dry ore. In treating most ores, a frothing agent such, for example, as
pine oil is required.
The reagents may be incorporated in the flotationpulp at any suitable stage of the flotation operation, or they may be added prior to the final wet grinding operation. Relatively pure com- In general, the most conven-' pounds or products of reactions designed to produce such compounds may be added to the pulp directly or in solution in suitable solvents. Thus, for example, water soluble compounds such as sodium a-naphthyl-dithiocarbamate may be employed in the form of concentrated aqueous solutions.
As a general rule, it is advisable'to add the reagent in successive portions at intervals of several minutes until the required amount has been added. The use of a filming agent such as sodium sulphide is sometimes desirable, and it is preferably added in successive portions at or immediately preceding the times at which the thiocarbamate additions are made. In carrying out the process of the invention, neutral and alkaline pulps may be employed. In general, the use of a slime-conditioning agent such as lime or sodium silicate is advantageous. Such agents may be added, conveniently, prior to the final wet grinding of the ore.
The following examples give typical results obtained in the treatment of ores containing copper and lead silicate and carbonate minerals:
Example I A 500 gram sample of Mason Valley copper ore containing practically all of its copper in the form of malachite and chrysocolla was ground with water to produce a pulp in which 89.4 percent of the particles were minus 200 mesh. The resulting pulp was subjected to a froth flotation operation for a period of 20 minutes in a Janney laboratory flotation machine.
The quantities of reagents employed results obtained were as follows:
and the Example II A 500 gram sample of Copper Basin copper ore containing practically all of its copper in the form of malachite and chrysocolla was ground with water to produce a pulp in which 85.2 percent of the particles were minus 200 mesh. The resulting pulp was subjected to a froth flotation operation for a period of 15 minutes in a Janney laboratory flotation machine.
The quantities of reagents employed and the results obtained were as follows:
flotation operation for a period of 20 minutes in the absence of sodium sulphide and in the presence of lime and an increased amount of sodium a-naphthyl-dithiocarbamate.
The quantities of reagents employed and the results obtained were as follows:
Reagents Lbs. per ton of dry ore Sodium a-naphthyl-dithlocarbamate 2. 0 Sodium s onto 3. 0 Sodium sulphide (NmSAlH O) 2. 0 Pine oil 0. 14
Percent Percent Cu recovery Example III A 500 gram sample of Miami copper ore containing practically all of its copper in the form of chrysocolla was ground with water to produce a pulp in which 84.3 percent of the particles were minus 200 mesh. The resulting pulp was subjected to a froth flotation operation for a period of 12 minutes in a Janney laboratory flotation machine;
The quantities of reagents employed and the results obtained were as follows:
Reagents Lbs. per.ton of dry ore Sodium a-naphthyl-dithiocarbamate 1.0 Sodium silicate l. 0 Sodium sulphide (N818.9H10) l. 0 Pine oil 0. 14
Percent Percent Cu recovery Heads 1. 75 10.81 74. 9 ailings 0. so
Example IV A 500 gram sample of Utah Copper Company copper ore containing practically all of its copper in the form of malachite and azurite was ground with water to produce a pulp in which 75.2 percent of the particles were minus 200 mesh. The resulting pulp was subjected to a froth flotation operation for a period of 15 minutes in a Janney laboratory flotation machine.
The quantities of reagents employed and the results obtained were as follows:
Reagents Lbs. per ton of dry ore Sodium aaphthyl-ditbiocarbamate l. 2 Sodium silicate 1. 0 Sodium sulphide (NaySAlHzO) 1. 0 Pine oil'. 0. 14
Percent Percent Cu recovery Home l. 81 Concentrates 13. 47 77. 5 Tailings 0. 46
Example V Another 500 gram sample of the Utah Copper Company ore, in a pulp corresponding to that employed in Example IV, was subjected to a similar Reagents Lbs. per tan 0! dry ore Sodium a-naphthyl-dithiocarbamate- 2. 0 Lime 0H),) 0.3 Pine Oil 0. 14
Percent re- Percent Cu covers,
Heads 1. 81 Concentrates 13. 47 76. 7 'Inilimm 0. 47
Example VI A third 500 gram sample of the Utah Copper Company ore, in a pulp corresponding to'that employed in Example IV, was subjected to a similar flotation operation for a period of 20 minutes in the absence of sulphide and in the presence of sodium silicate and an increased amount of sodium a-naphthyl-dithiocarbamate.
The quantities of reagents employed and the Example VII A 500 gram sample of Yellow Pine lead ore containing practically all of its lead in the form of cerussite was ground with water to produce a pulp in which 89.2 percent of the particles were minus 200 mesh. The resulting pulp was subjected to a froth flotation operation for a period of 15 minutes in a Janney laboratory flotation machine.
The quantities of reagents employed and the results obtained were as follows:
Reagents Lbs. per ton of dry ore Sodium a-naphthyl-dithicarbamate. 0. 6 Sodium sulphide (NihSQHgO) 6. 0 Pine oil 0. 14
Percent re- Percent Pb covery Heads 6. 67 Concentrates 40. 20 77. 3 Teilings l. 51
In each of the tests reported above, a pulp containing about 20% solids by weight was employed. The slime conditioning agents such. as lime and sodium silicate were added to the pulp during the grinding operations. The remaining reagents were added in small amounts at short intervals during the course of the flotation operations.
I claim:
1. The process of concentrating oxidized ore which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of an a.-naphthyl-dithiocarbamate.
2. The process of concentrating oxidized ore which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of an alkali metal salt of a-naphthyldithiocarbamic acid.
3. The process'of concentrating oxidized ore which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of sodium a-naphthyl-dithiocarbamate.
4. The process of concentrating oxidized copper ore which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of an a-naphthyl-dithiocarbamate..
5. The process of concentrating oxidized lead ore which comprises subjecting the lead ore in the form of a pulp to a froth flotation operation in the presence of an a-naphthyl-dithiocarbamate.
6. The process of concentrating copper silicate ore which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of sodium a-naphthyl-dithiocarbamate.
7. The process of concentrating copper carbonate ore which comprises subjecting the are in the form of a pulp to a froth flotation operation in the presence of sodium a-naphthyl-dithiocarbamate.
8. The process of concentrating lead carbonate ore which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of sodium a-naphthyl-dithiocarbamate.
9. The process of concentrating oxidized ore containing the mineral chrysocolla which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of an a-naphthyl-dithiocarbamate.
10. The process of concentrating oxidized ore containing the mineral malachite which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of an a-naphthyl-dithiocarbamate.
11. The process of concentrating oxidized ore containing the mineral cerussite which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of an a-naphthyl-dithiocarbamate.
12. The process of concentrating ox'dized ore containing the mineral chrysocolla whichcomprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of sodium a-naphthyl-dithiocarbamate.
13. The process of concentrating oxidized ore containing the mineral malachite whch comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of sodium a-naphthyl-dithiocarbamate.
14. The process of concentrating oxidized ore containing the mineral cerussite which comprses subjecting the ore in the form of a pulp to a froth flotation operation in the presence of sodium a-naphthyl-dithiocarbamate.
15. The process of concentrating ores of the type of oxidized lead and oxidized copper ores which comprises. subjecting the ore in the form of a pulp to a froth flotation operation in the presence of a sulphide filming agent and about 0.5 to 2.0 pounds of a dithiocarbamate per ton of dry ore.
16. The process of concentrating ores of the type of oxidized lead and oxidized copper ores which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of a sulphide filming agent, a slime conditioning agent and about 0.5 to 2.0 pounds of a dithiocarbamate per ton of dry ore.
17. The process of concentrating oxidized ore containing one or more minerals of the group consisting of malachite, azurite, cerussite and chrysocolla which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of a sulphide filming agent and about 0.5 to 2.0 pounds of a dithiocarbamate per ton of dry ore.
18. The process of concentrating oxidized ore containing one or more minerals of the group consisiting of malachite, azurite, cerussite and chrysocolla which comprises subjecting the ore in the form of a pulp to a froth flotation .operation in the presence of a sulphide filming agent, a slime conditioning agent and about 0.5 to 2.0 pounds of a dithiocarbamate per ton of dry ore.
18. The process of concentrating oxidized ore containing one or more minerals of the group consisting of malachite, azurite, cerussite and chrysocolla which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of about 0.5 to 2.0 pounds of an alkali metal dithiocarbamate per ton of dry ore.
20. The process of concentrating oxidized ore containing one or more minerals of the group consisting of malachite, azurite, cerussite and chrysocolla which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of a sulphide filming agent and about 0.5 to 2.0 pounds of an alkali metal dithiocarbamate per ton of dry ore.
21. The process of concentrating oxidized ore containing one or more minerals of the group consisting of malachite, azurite, cerussite and chrysocolla which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of a slime conditioning agent and about 0.5 to 2.0 pounds of an alkali metal dithiocarbamate per ton of dry ore.
22. The process of concentrating oxidized ore containing one or more minerals of the group consisting of malachite, azurite, cerussite and chrysocolla which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of a sulphide filming agent, a slime conditioning agent and about 0.5 to 2.0 pounds of an alkali metal dithiocarbamate per ton of dry ore.
23. The process of concentrating oxidized ore containing one or more minerals ofthe group consisting of malachite, azurite, cerussite and chrysocolla which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of an alkali metal dithiocarbamate.
24. The process of concentrating oxidized ore containing one or more minerals of the group consisting of malachite, azurite, cerussite and chrysocolla which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of a sulphide filming agent and an alkali metal dithiocarbamate.
25. The process of concentrating oxidized ore containing one or more minerals of the group consisting of malachite, azurite, cerussite and chrysocolla which comprises subjecting the ore in the tom of a pulp to a froth flotation operation in the presence of a slime conditioning agent and an alkali metal dithiocarbamate.
26. The process of concentrating oxidized ore containing one or more minerals of the group consisting of malachite, azurite, cerussite and chrysocolla which comprises subjecting the ore in the form of a pulp to a froth flotation operation in the presence of a sulphide filming agent, a slime conditioning agent and an alkali metal dithiocarbamate.
27. A process of concentrating oxidized ore containing the mineral malachite, which com-
US545838A 1931-06-20 1931-06-20 Concentration of oxidized minerals Expired - Lifetime US1972247A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US545838A US1972247A (en) 1931-06-20 1931-06-20 Concentration of oxidized minerals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US545838A US1972247A (en) 1931-06-20 1931-06-20 Concentration of oxidized minerals

Publications (1)

Publication Number Publication Date
US1972247A true US1972247A (en) 1934-09-04

Family

ID=24177749

Family Applications (1)

Application Number Title Priority Date Filing Date
US545838A Expired - Lifetime US1972247A (en) 1931-06-20 1931-06-20 Concentration of oxidized minerals

Country Status (1)

Country Link
US (1) US1972247A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528784A (en) * 1968-03-21 1970-09-15 Banner Mining Co Method for preliminary beneficiation of calcareous oxidized copper ores by flotation of a high acid-consuming fraction containing low copper values from a low acid-consuming fraction containing higher copper values

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528784A (en) * 1968-03-21 1970-09-15 Banner Mining Co Method for preliminary beneficiation of calcareous oxidized copper ores by flotation of a high acid-consuming fraction containing low copper values from a low acid-consuming fraction containing higher copper values

Similar Documents

Publication Publication Date Title
US1833740A (en) Process of ore flotation
US2310240A (en) Flotation of ores
US4385038A (en) Flotation recovery of lead, silver and gold as sulfides from electrolytic zinc process residues
US2011176A (en) Ore concentration
US1801318A (en) Concentration of ores
US1972247A (en) Concentration of oxidized minerals
US2501269A (en) Froth flotation of sulfide ores
US2285394A (en) Flotation method
US1788331A (en) Concentration process for flotable substances as ores, coals, graphite, and the like
US1801319A (en) Flotation of minerals
US1497699A (en) Concentration of ores
US2169313A (en) Concentration of metalliferous ores by flotation
US3822014A (en) Process of flotation of minterals and ores
US1652060A (en) Process of concentrating ores and minerals by flotation
US1554216A (en) Froth-flotation concentration of ores
US1554220A (en) Concentration of ores
US2512715A (en) Froth flotation of sulfide ores
US4466886A (en) Froth flotation method for recovering minerals
US1801317A (en) Separation of minerals by flotation
US1801320A (en) Concentration of ores
US1833464A (en) Ore concentration
US1807860A (en) Separation of minerals
US4424123A (en) Ore flotation using fulvenes
US1716104A (en) Concentration of ores by flotation
US1833427A (en) Flotation concentration of metalliferous minerals