US1974218A - Method of ore separation - Google Patents
Method of ore separation Download PDFInfo
- Publication number
- US1974218A US1974218A US630092A US63009232A US1974218A US 1974218 A US1974218 A US 1974218A US 630092 A US630092 A US 630092A US 63009232 A US63009232 A US 63009232A US 1974218 A US1974218 A US 1974218A
- Authority
- US
- United States
- Prior art keywords
- sulfide
- chalcopyrite
- zinc
- ore
- pyrite
- 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
- 238000000926 separation method Methods 0.000 title description 5
- 238000000034 method Methods 0.000 title description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 18
- 229910052951 chalcopyrite Inorganic materials 0.000 description 14
- DVRDHUBQLOKMHZ-UHFFFAOYSA-N chalcopyrite Chemical compound [S-2].[S-2].[Fe+2].[Cu+2] DVRDHUBQLOKMHZ-UHFFFAOYSA-N 0.000 description 14
- 229910052683 pyrite Inorganic materials 0.000 description 12
- 238000009291 froth flotation Methods 0.000 description 11
- GTLDTDOJJJZVBW-UHFFFAOYSA-N zinc cyanide Chemical compound [Zn+2].N#[C-].N#[C-] GTLDTDOJJJZVBW-UHFFFAOYSA-N 0.000 description 11
- 229910021529 ammonia Inorganic materials 0.000 description 9
- 229910052981 lead sulfide Inorganic materials 0.000 description 9
- 229940056932 lead sulfide Drugs 0.000 description 9
- 229910052950 sphalerite Inorganic materials 0.000 description 8
- 150000004763 sulfides Chemical class 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 5
- 239000011028 pyrite Substances 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- 239000005083 Zinc sulfide Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000002401 inhibitory effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000001143 conditioned effect Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 3
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 229910001779 copper mineral Inorganic materials 0.000 description 2
- 229910000365 copper sulfate Inorganic materials 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 description 2
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910052952 pyrrhotite Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052569 sulfide mineral Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
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
- B03D1/06—Froth-flotation processes differential
-
- 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 improvements in the froth flotation treatment of ores.
- the object of this invention is to materially improve the recovery of the copper minerals in their copper concentrates, or any other mineral, the surface film of which is soluble in an ammoniacal solution.
- ammonia is particularly suitable for this purpose because the zinc cyanide coating on copper sulfide is soluble in ammonia, but the zinc cyanide coating on sphalerite is not soluble, nor is the zinc cyanide coating on iron pyrite scluble, in ammonia. Ammonia, then, in conjunction with Zinc cyanide, is a very valuable promoter. Take its action, for example, on Buchans ore from Newfoundland, which contains lead sulfide, chalcopyrite, sphalerite and iron pyrite.
- the chalcopyrite, sphalerite and pyrite are all inhibited to the extent that they float with little or no activity; whereas, the lead sulfide has not been inhibited; in fact indications seem conclusive that cyanide is very beneficial, either the insoluble or soluble kind, in suspension or solution when lead sulfide is to be floated, indicating that any films which might obstruct the lead sulfide from attaching to a bubble are removed by the cyanide making a clean lead sulfide surface and a very active, rapid floating condition for lead sulfide.
- Ammonium hydroxide (NI-140E) is now added in an amount of about three-tenths of a pound and the ore conditioned for about five minutes, whereby the chalcopyrite is revivified and is then removed by froth flotation.
- the zinc sulphide is now revivified by adding about eight-tenths of a pound of copper sulphate (011304) and one pound of calcium hydroxide, Ca(OH)z, and after conditioning for about five minutes the ore is again subjected to froth flotation whereby the zinc is removed leaving only the pyrite and the gangue.
- the steps of inhibiting one or more of the sulfides with zinc cyanide and adding ammonia to dissolve the film from the surface of one of the inhibited sulfides, and subjecting to the froth flotation treatment for the separasulfide ores by froth flotation the steps of adding zinc cyanide whereby one or more of the sulfides are inhibited, subjecting the pulp to froth flotation whereby any sulfide that has not been inhibited will be separated, adding ammonia to dissolve the film from the surface of one of the inhibited sulfides, and subjecting the pulp to the froth flotation treatment for the separation of the sulfide so promoted.
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
Patented Sept. 18, 1934 TES METHOD OF ORE SEPARATION Joseph P. Ruth, Jr., Denver, 0010., assignor to The Ruth Company, Denver, 0010., a corporation of Colorado No Drawing. Application August 23, 1932, Serial No. 630,092
4 Claims.
This invention relates to improvements in the froth flotation treatment of ores.
The object of this invention is to materially improve the recovery of the copper minerals in their copper concentrates, or any other mineral, the surface film of which is soluble in an ammoniacal solution. I have found that in treating complex ores containing pyrrhotite, pyrite, copper, zinc and iron sulfide, by a method of inhibiting by means of Zinc cyanide, a particularly strong depressing action is effected on the chalcopyrite and upon copper minerals generally by the precipitation, I believe, of a film on the surface of the chalcopyrite at the same time that the zinc sulfide and iron sulfide are depressed by the same chemical in much the same manner. In using this chemical to depress, it is naturally necessary when the time comes to float, to promote the particular sulfide with some chemical which will not promote the other sulfides. I have found ammonia to be particularly suitable for this purpose because the zinc cyanide coating on copper sulfide is soluble in ammonia, but the zinc cyanide coating on sphalerite is not soluble, nor is the zinc cyanide coating on iron pyrite scluble, in ammonia. Ammonia, then, in conjunction with Zinc cyanide, is a very valuable promoter. Take its action, for example, on Buchans ore from Newfoundland, which contains lead sulfide, chalcopyrite, sphalerite and iron pyrite. By conditioning this ore properly with zinc cyanide, the chalcopyrite, sphalerite and pyrite are all inhibited to the extent that they float with little or no activity; whereas, the lead sulfide has not been inhibited; in fact indications seem conclusive that cyanide is very beneficial, either the insoluble or soluble kind, in suspension or solution when lead sulfide is to be floated, indicating that any films which might obstruct the lead sulfide from attaching to a bubble are removed by the cyanide making a clean lead sulfide surface and a very active, rapid floating condition for lead sulfide. After the lead sulfide has been removed from this pulp, it becomes necessary to revivify or promote the flotation of the copper sulfide minerals, in this case chalcopyrite, and at the same time not promote, or, in a few words, not clean the surfaces of the sphalerite or iron pyrite, by the use of a chemical which will dissolve the film from the chalcopyrite, and if possible, maintain a precipitating condition on the sphalerite and on the pyrite. This is effected by ammonia. The addition of a satisfactory quantity of ammonia renders the coating on the chalcopyrite soluble which results in perfect flotation of the chalcopyrite while maintaining perfect inhibition of the zinc and the iron. After the copper has been removed, the zinc is promoted and floated with copper sulfate in the well known manner.
As an example of my method let us take a complex ore containing lead sulfiide, chalcopyrite sphalerite and iron pyrite. After the ore is ground; it is conditioned with zinc cyanide which inhibits the chalcopyrite, the sphalerite and the pyrite, but does not have any inhibiting action on the lead sulfide which can therefore be removed by subjecting the pulp to froth flotation treatment. After the lead sulfide has been re moved the chalcopyrite is promoted by the addi tion of ammonia in sufficient quantity to dissolve the inhibiting film. The copper sulfide is now removed by subjecting the pulp to froth flotation treatment, after which the zinc is promoted by adding copper sulfate and subjecting the pulp to froth flotation treatment thus leaving only the iron pyrite.
As a specific example let us take one ton of Bachans ore from Newfoundland, which contains lead sulphide (PbS) chalcopyrite (CuFeSz), zinc sulphide (ZnS) and iron pyrite (F682). The ore is ground in water until the requisite fineness has been attained and is then conditioned for a period of about fifteen (15) minutes with zinc cyanide, Zn(Cn)2 about one-half of a pound being used. Cresylic acid and a disubstituted dithiophosphate commonly referred to as aerofloat 25, about two-tenths of a pound of each is now added and the ore subjected to froth flotation whereby the lead sulphide is removed. Ammonium hydroxide (NI-140E) is now added in an amount of about three-tenths of a pound and the ore conditioned for about five minutes, whereby the chalcopyrite is revivified and is then removed by froth flotation. The zinc sulphide is now revivified by adding about eight-tenths of a pound of copper sulphate (011304) and one pound of calcium hydroxide, Ca(OH)z, and after conditioning for about five minutes the ore is again subjected to froth flotation whereby the zinc is removed leaving only the pyrite and the gangue.
What I claim is:
1. In the differential separation of complex sulfide ores, the steps of inhibiting one or more of the sulfides with zinc cyanide and adding ammonia to dissolve the film from the surface of one of the inhibited sulfides, and subjecting to the froth flotation treatment for the separasulfide ores by froth flotation, the steps of adding zinc cyanide whereby one or more of the sulfides are inhibited, subjecting the pulp to froth flotation whereby any sulfide that has not been inhibited will be separated, adding ammonia to dissolve the film from the surface of one of the inhibited sulfides, and subjecting the pulp to the froth flotation treatment for the separation of the sulfide so promoted.
3. In the difierential separation of complex sulfide ores containing chalcopyrite, sphalerite and iron pyrite, the steps of adding zinc cyanide whereby ail of the sulfides are inhibited, adding
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US630092A US1974218A (en) | 1932-08-23 | 1932-08-23 | Method of ore separation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US630092A US1974218A (en) | 1932-08-23 | 1932-08-23 | Method of ore separation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1974218A true US1974218A (en) | 1934-09-18 |
Family
ID=24525714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US630092A Expired - Lifetime US1974218A (en) | 1932-08-23 | 1932-08-23 | Method of ore separation |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1974218A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2620068A (en) * | 1951-08-16 | 1952-12-02 | American Cyanamid Co | Depression of copper minerals from ores and concentrates |
| US3309029A (en) * | 1963-09-09 | 1967-03-14 | Int Nickel Co | Activation of sulfide ores for froth flotation |
-
1932
- 1932-08-23 US US630092A patent/US1974218A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2620068A (en) * | 1951-08-16 | 1952-12-02 | American Cyanamid Co | Depression of copper minerals from ores and concentrates |
| US3309029A (en) * | 1963-09-09 | 1967-03-14 | Int Nickel Co | Activation of sulfide ores for froth flotation |
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