US1706293A - Concentration oe copper ores - Google Patents
Concentration oe copper ores Download PDFInfo
- Publication number
- US1706293A US1706293A US1706293DA US1706293A US 1706293 A US1706293 A US 1706293A US 1706293D A US1706293D A US 1706293DA US 1706293 A US1706293 A US 1706293A
- Authority
- US
- United States
- Prior art keywords
- acetylene
- concentration
- air
- ore
- copper ores
- 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
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title description 5
- 229910052802 copper Inorganic materials 0.000 title description 5
- 239000010949 copper Substances 0.000 title description 5
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 16
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 16
- 239000000203 mixture Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 239000011261 inert gas Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000005997 Calcium carbide Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 2
- 101100119772 Caenorhabditis elegans fat-7 gene Proteins 0.000 description 1
- 241000907663 Siproeta stelenes Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910001779 copper mineral Inorganic materials 0.000 description 1
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 1
- LBJNMUFDOHXDFG-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu].[Cu] LBJNMUFDOHXDFG-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Images
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
- B03D1/02—Froth-flotation processes
-
- 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
- the invention relates to the concentration of copper ores by froth dotation, and in particular to the treatment of oxidized copper minerals, such as malachite, cuprite and chrysocolla, to render them amenable to such flotation.
- oxidized copper minerals such as malachite, cuprite and chrysocolla
- lt is known that only the sulphide ores of copper are satisfactorily fioatable, and it has been proposed to treat the oxidized ores with acetylene to increase their floatability.
- the invention comprises improvements in the process last referred to.
- acetylene can be applied in a variety of ways, and either simultaneously With the grinding of the ore or after grinding is completed.
- Previously prepared gaseous acetylene may be injected into the pulp of ore and Water, or merely brought into contact with the surface of the liquid, or a solution of acetylene in water or other solvent may be mixed with the ore or pulp, or calcium car bide may be added to the pulp whereupon the Water present will of course decompose the carbide and produce acetylene.
- the ore j is subjected to the oxidizing action of atmospheric air.
- the air may be initially present in the Water used or it may be taken up by the Water when the latter is agitated in the presence of air, as Where the ore is ground While the acetylene is being applied to it.
- My experiments indicate that the action of air is undesirable, and that it interferes with the effect sought to be brought about by the acetylene, at least when air has unrestricted access to the pulp.
- explosive mixtures of air and acetylene may be formed in and around the grinding mills and other apparatus, and the presence of such explosive mixtures is an undesirable hazard.
- the invention consists in preventing or diminishing contact of the ground ore with oxygen by displacing ⁇ or diluting with an inert gas the air which might otherwise act on the ore.
- inert gases or more or less pure nitrogen or carbon dioxide, are mentioned as examples of inert gases suitable for this purpose.
- the inert gas is preferably adnlixed with the acetylene in such proportions that nonexplosive mixtures are produced. l/here the atmosphere in contact with the ore contains suflicient inert to render it noncxplosivajthe concentration of oxygen pres- Seral No. 128,677.
- rlhe process of preparing oxidized copper minera-ls for f ath flotation which comprises suspending the Jfinely ground mineral in Water as a pulp, treating the minera-l particles with acetylene, and preventing aeration of the pulp during the process by displacing air in contact therewith by a noncombustible, inert gas, whereby the act-ion of the acetylene on the mineral particles is intensified.
Description
M lg? 1929. l an HOLLADAY 1,706,293
CONCENTRATION OF COPPER ORES Filed Aug.- ll, 1926 x o AA lll 'Patented lidar. 19, 1929.
UNITED STATES PATENT OFFICE.
JAMES A. HOLLADAY, OF DOUGLASTON, NEW YORK, ASSIGNOR TO UNION CARBID'E SALES COMPANY, A CORPORATION 0F WEST VIRGINIA.
CONCENTRATION 0F COPPER CRES.
Application filed August 11, 1926.
The invention relates to the concentration of copper ores by froth dotation, and in particular to the treatment of oxidized copper minerals, such as malachite, cuprite and chrysocolla, to render them amenable to such flotation. lt is known that only the sulphide ores of copper are satisfactorily fioatable, and it has been proposed to treat the oxidized ores with acetylene to increase their floatability. The invention comprises improvements in the process last referred to.
'lhe acetylene can be applied in a variety of ways, and either simultaneously With the grinding of the ore or after grinding is completed. Previously prepared gaseous acetylene may be injected into the pulp of ore and Water, or merely brought into contact with the surface of the liquid, or a solution of acetylene in water or other solvent may be mixed with the ore or pulp, or calcium car bide may be added to the pulp whereupon the Water present will of course decompose the carbide and produce acetylene.
'As an incident to several of the desirable methods of applyingl the acetylene, the ore j is subjected to the oxidizing action of atmospheric air. The air may be initially present in the Water used or it may be taken up by the Water when the latter is agitated in the presence of air, as Where the ore is ground While the acetylene is being applied to it. My experiments indicate that the action of air is undesirable, and that it interferes with the effect sought to be brought about by the acetylene, at least when air has unrestricted access to the pulp. Furthermore, explosive mixtures of air and acetylene may be formed in and around the grinding mills and other apparatus, and the presence of such explosive mixtures is an undesirable hazard.
The invention consists in preventing or diminishing contact of the ground ore with oxygen by displacing` or diluting with an inert gas the air which might otherwise act on the ore. lilue gases, or more or less pure nitrogen or carbon dioxide, are mentioned as examples of inert gases suitable for this purpose.
The inert gas is preferably adnlixed with the acetylene in such proportions that nonexplosive mixtures are produced. l/here the atmosphere in contact with the ore contains suflicient inert to render it noncxplosivajthe concentration of oxygen pres- Seral No. 128,677.
ent will in general be insuflicient to interfere seriously with the action of the acetylene on the ore.
ln the annexed drawing I have indicated on a triaxialdiagram those mixtures of acetylene, air, and nitrogen which are nonexplosive. It Will be understood that the explosibility of a gas mixture cannot be stated With precision, inasmuch as it is largely influenced by the shape and size of the vessel containing the mixture, and by the character of the means used for ignition. An intense or fat7 spark Will ignite many mixtures which can not be ignited by a less energetic spark of the same length. In the experiments on which the diagram is based, the gas mixtures were saturated With Water vapor at C., and were subjected to the action of a rather thin spark l/iL inch in length while held in a spherical bulb of approximately 3 inches diameter, the spark gap being at the center. All ignitible mixtures Were classified as explosive, even though combustion proceeded quietly under the test conditions. The tests were arranged with a view to simulating conditions which might arise in the treatment of ores With acetylene.
It will be apparent that displacement of air by inert gas in accordance With the invention may be effected in many different Ways, depending on the manner in which the acetylene is applied. Procedure Which has given good results is to ilow the pulp into a ball mill arranged to be closed gas-tight or nearly so; pass nitrogen into the mill until the oxygen concentration is sufficiently diminished; add calcium carbide While substantially preventing access of air; grind the charge; and then discharge the mill.
I claim:
rlhe process of preparing oxidized copper minera-ls for f ath flotation which comprises suspending the Jfinely ground mineral in Water as a pulp, treating the minera-l particles with acetylene, and preventing aeration of the pulp during the process by displacing air in contact therewith by a noncombustible, inert gas, whereby the act-ion of the acetylene on the mineral particles is intensified.
In testimony whereof, I aflix my signature.
JAMES A. HOLLADAY.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1706293A true US1706293A (en) | 1929-03-19 |
Family
ID=3417639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US1706293D Expired - Lifetime US1706293A (en) | Concentration oe copper ores |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1706293A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3394893A (en) * | 1964-06-11 | 1968-07-30 | Exxon Research Engineering Co | Heat treatment of surface active reagents in flotation |
| US3902602A (en) * | 1972-05-08 | 1975-09-02 | Vojislav Petrovich | Froth flotation method for recovery of minerals |
| FR2595058A1 (en) * | 1986-02-28 | 1987-09-04 | Air Liquide | Process for enriching (concentrating) a sulphur-containing ore |
-
0
- US US1706293D patent/US1706293A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3394893A (en) * | 1964-06-11 | 1968-07-30 | Exxon Research Engineering Co | Heat treatment of surface active reagents in flotation |
| US3902602A (en) * | 1972-05-08 | 1975-09-02 | Vojislav Petrovich | Froth flotation method for recovery of minerals |
| FR2595058A1 (en) * | 1986-02-28 | 1987-09-04 | Air Liquide | Process for enriching (concentrating) a sulphur-containing ore |
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