US1850991A - Froth-flotation concentration of ores - Google Patents
Froth-flotation concentration of ores Download PDFInfo
- Publication number
- US1850991A US1850991A US127181A US12718126A US1850991A US 1850991 A US1850991 A US 1850991A US 127181 A US127181 A US 127181A US 12718126 A US12718126 A US 12718126A US 1850991 A US1850991 A US 1850991A
- Authority
- US
- United States
- Prior art keywords
- ore
- froth
- carbonate
- pounds
- 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
- 238000009291 froth flotation Methods 0.000 title description 8
- 239000010949 copper Substances 0.000 description 18
- 229910052802 copper Inorganic materials 0.000 description 15
- RMVRSNDYEFQCLF-UHFFFAOYSA-N thiophenol Chemical compound SC1=CC=CC=C1 RMVRSNDYEFQCLF-UHFFFAOYSA-N 0.000 description 15
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 12
- 239000012141 concentrate Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 11
- 239000012991 xanthate Substances 0.000 description 9
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 8
- 229940116318 copper carbonate Drugs 0.000 description 7
- GEZOTWYUIKXWOA-UHFFFAOYSA-L copper;carbonate Chemical compound [Cu+2].[O-]C([O-])=O GEZOTWYUIKXWOA-UHFFFAOYSA-L 0.000 description 7
- 239000010665 pine oil Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 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 5
- 238000003556 assay Methods 0.000 description 5
- 229930003836 cresol Natural products 0.000 description 5
- 230000001419 dependent effect Effects 0.000 description 5
- 238000005188 flotation Methods 0.000 description 5
- JCBJVAJGLKENNC-UHFFFAOYSA-M potassium ethyl xanthate Chemical compound [K+].CCOC([S-])=S JCBJVAJGLKENNC-UHFFFAOYSA-M 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 125000005587 carbonate group Chemical group 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- MFEVGQHCNVXMER-UHFFFAOYSA-L 1,3,2$l^{2}-dioxaplumbetan-4-one Chemical compound [Pb+2].[O-]C([O-])=O MFEVGQHCNVXMER-UHFFFAOYSA-L 0.000 description 1
- RFCQDOVPMUSZMN-UHFFFAOYSA-N 2-Naphthalenethiol Chemical compound C1=CC=CC2=CC(S)=CC=C21 RFCQDOVPMUSZMN-UHFFFAOYSA-N 0.000 description 1
- 241000219498 Alnus glutinosa Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910000003 Lead carbonate Inorganic materials 0.000 description 1
- 241001233242 Lontra Species 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229950011260 betanaphthol Drugs 0.000 description 1
- 229960001506 brilliant green Drugs 0.000 description 1
- HXCILVUBKWANLN-UHFFFAOYSA-N brilliant green cation Chemical compound C1=CC(N(CC)CC)=CC=C1C(C=1C=CC=CC=1)=C1C=CC(=[N+](CC)CC)C=C1 HXCILVUBKWANLN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- -1 mercaptides Substances 0.000 description 1
- UDCIYVVYDCXLSX-SDNWHVSQSA-N n-[(4-amino-2-methylpyrimidin-5-yl)methyl]-n-[(e)-5-hydroxy-3-(propyldisulfanyl)pent-2-en-2-yl]formamide Chemical compound CCCSS\C(CCO)=C(/C)N(C=O)CC1=CN=C(C)N=C1N UDCIYVVYDCXLSX-SDNWHVSQSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- RZFBEFUNINJXRQ-UHFFFAOYSA-M sodium ethyl xanthate Chemical compound [Na+].CCOC([S-])=S RZFBEFUNINJXRQ-UHFFFAOYSA-M 0.000 description 1
- MWNQXXOSWHCCOZ-UHFFFAOYSA-L sodium;oxido carbonate Chemical group [Na+].[O-]OC([O-])=O MWNQXXOSWHCCOZ-UHFFFAOYSA-L 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
- B03D1/001—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
- 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
- B03D2203/04—Non-sulfide 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 froth-flotation concentration of ores and is herein. illustrated as applied to the concentration of ores whose principal value is carbonate of-copper 6 or carbonate of lead.
- Potassium and sodium xanthate have been extensively used in the froth-flotation concentration of sulphide ores, being usually used in the proportion of a tenth of a. pound or less to a quarter of a pound per ton of ore. Used in such proportions in the froth-flotation process they have markedly improved recoveries and have had other useful results.
- these ordinary agents as well as agentshitherto 26 commercially untried, may be used according to modified procedures with the result that refractory ores like copper carbonate 1 ores prove amenable to froth-flotation'treatment in the machines hitherto used.
- the invention is herein illustrated as car ried out with the organic sulphur-containing compounds known as xanthates, mercaptides, and thio-phenol. It was also found posslble to use para-thio-cresol, thio-beta naphthol, and mercapto-benzo-thiazdle,these being progressively less effective. All the substances thus grouped contain simple sulphhydric radicals such as S H, --S-Na, -S-K,' for example.
- Em'ample 2 A test similar except that only 2 pounds of the xanthate per t0n.of
- Example 4 Lead carbonate ore from the Shattuck-Arizonamine in Arizona, containing no identifiable sulphide, was agitatedin a minerals separation subaeration machine for two minutes with 0.32 pounds of pine oil andone pound of potassium xanthate, both er ton of ore, and a first froth concentrate collected. There was then added two pounds moreof the potassium xanthate, agitation continued for two minutes and a second froth a third froth concentrate collected. The
- mixed concentrates contained 27.10% of lead and contained 93.0% of the lead in'the ore.
- Recov- Assays eries pounds of pine oil, per ton of ore, and then a froth concentrate separated for three minutes. There was then further added 4 poupds of thio-phenol, 0.8 pounds of steam distilled pine oil, both per ton of ore, and the pulp agitated for one minute and then a second froth concentrate separated for three minutes. There was then further added 4 pounds of thio-phenol per ton. of ore, the pulp agitated for one minute, and then a third froth separated for three minutes. The results are shown in the following table:
- Example 6'.Bwana MKubwa ore ground to pass 65 mesh was made into a pulp with water and agitated for one minute in a subaeration testing machine with 4 pounds of potassium xanthate and 0.48 ounds of cresol, both per ton-of ore, an then a froth concentrate removed for three minutes. There was then added a further 0.32 pounds of cresol per ton of ore, the pulp agitated for one minute, and then a second froth concentrate removed for three minutes. Finally there was further added 2 pounds of the Xanthate and 0.4 pounds of cresol, both per ton of ore, the pulp agitated for one minute, and then a third froth concentrate removed for three minutes. The results are shown in the following table:
- Ewample 8 In another test 0.30 pounds of cresol and 4 pounds of thiophenol, both per ton of ore, were added together to a pulp of the same ore to form a first froth, instead of the successive addition of pine oil and thiophenol. By this procedure a first concentrate was obtained containing 17.85% copper and representing 85.3% of the copper in the ore.
- Example 9 --Bwana MKubwa ore ground to pass 65 mesh was made into a pulp with water and agitated in a subaeration testing machine for one minute with 0.32 pounds of steam distilled pine oil, and then a first froth separated for three minutesf There was further added 4 pounds of potassiumethyl mercaptide per ton of ore, the pul agitated for one minute, and then a second fr ed for three minutes. added 4 pounds of potassium ethyl mercaptide per ton of ore, the pulp agitated for one minute, and then a third froth separated for three minutes.
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
Patented Mar. 22;, was
- 'UNiT-E' s'm'ra s WILLIAM TROTTER,'.OF NEW YORK, N. Y., ASSIGNOR TO MINERALS Sl'JPARATION N ORTH AMERICAN CORPORATION, OFNRW YORK, N. :Y A CORPORATION OF MARYLAND IROTE-EIOTATION' CONCENTRATION OF ORES No Drawing.
This invention relates to'the froth-flotation concentration of ores and is herein. illustrated as applied to the concentration of ores whose principal value is carbonate of-copper 6 or carbonate of lead.
Such ores have hitherto proved refractory to treatment for concentration by the agents generally used when following the usual froth-flotation procedures. v
Potassium and sodium xanthate have been extensively used in the froth-flotation concentration of sulphide ores, being usually used in the proportion of a tenth of a. pound or less to a quarter of a pound per ton of ore. Used in such proportions in the froth-flotation process they have markedly improved recoveries and have had other useful results.
But these substances have been without substantial effect when used in these amounts in attempting concentration of carbonate ores by the froth-flotation process. Q
According to the present invention these ordinary agents, as well as agentshitherto 26 commercially untried, may be used according to modified procedures with the result that refractory ores like copper carbonate 1 ores prove amenable to froth-flotation'treatment in the machines hitherto used.
The invention is herein illustrated as car ried out with the organic sulphur-containing compounds known as xanthates, mercaptides, and thio-phenol. It was also found posslble to use para-thio-cresol, thio-beta naphthol, and mercapto-benzo-thiazdle,these being progressively less effective. All the substances thus grouped contain simple sulphhydric radicals such as S H, --S-Na, -S-K,' for example. According to xanthate and other substances are used in much larger amounts than has been cus- *tomary in the froth-flotation process, with 4 the result that a copper carbonate ore 1s as effectively concentrated as is a sulphide ore.
If only the organic sulphur-containing compounds are used in addition to the mineralfrothing agents, at least a pound, usually upwards of two pounds, per ton of ore of such copper andrepresenting51.1% of the the present invention the p Application filed August 4,1926. Serial No. 127.181.
copper, was agitated in a five to one-aqueous pulp with 0.32 pounds of pine oil and 4 pounds of potassium xantha te, both per ton of ore. A brilliant green froth float was obtaining containing 10.44% copper and con taining'94.1% of the copper in the ore. The froth was extremely stable, standing up several hours, dropping some gangue. The concentrates were capable of being easily recleaned.
Em'ample 2:A test similar except that only 2 pounds of the xanthate per t0n.of
ore were used instead of the 4 pounds of Example 1, yielded a smaller float containmg 10.02% copper and representing 79.2%
of the copper in the ore.
Example 3.-Andes. Copper Co. ore containing 1.19% copper largely in the form of copper carbonate, was agitated with a suitable r'nineral-frothing agent and with 4 pounds of potassium xanthate per ton of ore to yield a froth concentrate containing 9.5% copper in the ore.
Example 4.Lead carbonate ore from the Shattuck-Arizonamine in Arizona, containing no identifiable sulphide, was agitatedin a minerals separation subaeration machine for two minutes with 0.32 pounds of pine oil andone pound of potassium xanthate, both er ton of ore, and a first froth concentrate collected. There was then added two pounds moreof the potassium xanthate, agitation continued for two minutes and a second froth a third froth concentrate collected. The
mixed concentrates contained 27.10% of lead and contained 93.0% of the lead in'the ore.
The detailed results are shown in the following table:
Recov- Assays cries Wt. Pb. Pb.
Heads 100. 4. 3 100. 1st Cone 9. 9 30. 66. 4 2nd Cone 2. 6 25. 4 14.8 3rd Cone 2. 8 1S. 3 11. 8 l Tails as 1 0. a7 7. 0
ished concentrate and a middling. The
results are shown in the following table:
Recov- Assays eries pounds of pine oil, per ton of ore, and then a froth concentrate separated for three minutes. There was then further added 4 poupds of thio-phenol, 0.8 pounds of steam distilled pine oil, both per ton of ore, and the pulp agitated for one minute and then a second froth concentrate separated for three minutes. There was then further added 4 pounds of thio-phenol per ton. of ore, the pulp agitated for one minute, and then a third froth separated for three minutes. The results are shown in the following table:
of 1Fpptassium xanthate per ton of ore to yield a Wt. Cu. Cu.%
seas
new
swa
Example 6'.Bwana MKubwa ore ground to pass 65 mesh was made into a pulp with water and agitated for one minute in a subaeration testing machine with 4 pounds of potassium xanthate and 0.48 ounds of cresol, both per ton-of ore, an then a froth concentrate removed for three minutes. There was then added a further 0.32 pounds of cresol per ton of ore, the pulp agitated for one minute, and then a second froth concentrate removed for three minutes. Finally there was further added 2 pounds of the Xanthate and 0.4 pounds of cresol, both per ton of ore, the pulp agitated for one minute, and then a third froth concentrate removed for three minutes. The results are shown in the following table:
Assays Example 7.-Bwana MKubwa ore ground water and agitated for one minute with 0.32
to pass 65 mesh was made into a pulp with T as Recov- Assays erles Wt. Cu. Cu.
Head's. 4. 08 100. 15!. Gone. 6. 71 33. 7 2nd Gone 24. 56 57. 8 3rd Cone 3.61 6. 5 0. 13 2.0
Ewample 8.-In another test 0.30 pounds of cresol and 4 pounds of thiophenol, both per ton of ore, were added together to a pulp of the same ore to form a first froth, instead of the successive addition of pine oil and thiophenol. By this procedure a first concentrate was obtained containing 17.85% copper and representing 85.3% of the copper in the ore.
Example 9.--Bwana MKubwa ore ground to pass 65 meshwas made into a pulp with water and agitated in a subaeration testing machine for one minute with 0.32 pounds of steam distilled pine oil, and then a first froth separated for three minutesf There was further added 4 pounds of potassiumethyl mercaptide per ton of ore, the pul agitated for one minute, and then a second fr ed for three minutes. added 4 pounds of potassium ethyl mercaptide per ton of ore, the pulp agitated for one minute, and then a third froth separated for three minutes. For comparison the same procedure was followed for a fourth and fifth froths, adding potassium xanthate, however, instead of the mercaptide. The results are shown in the following table, from which it will be seen that the mercaptide produced a hitherto unequalled recovery of copper from this ore, although not as good a recovery as in other examples of this specification:
Assays Regsver- Wt.% Cu.% 1
oth separat- There was further stantially dependent 'Para-thio-cresol when dissolved in acetone and then added to an ore pulp in large amounts, yielded, with cresol as a mineralfrothing agent, the same kind of froth as did large amounts of xanthate. When dissolved in caustic soda solution and then added in large amounts to an ore pulp or'copper carbonate ore with pine oil as a mineral-frothing agent, it produced a froth like that characteristic of large amounts of a xanthate,
Thio-beta-naphthol when dissolved in alcohol and then added in large amount to a tone yielded a dirty mineral-bearing froth showing considerable concentration when added in acetone solution to a carbonate of copper ore pulp containing a mineral-frothing a ent and silicate of soda and then agitated. otter results were obtained with a dc slimed ore pulp. It yielded no useful result when added in caustic soda solution under similar conditions.
Having described certain embodiments of the invention, what is claimed is:
1. The process of concentrating ores which consists in agitating a pulp of an ore containing a relatively large fraction of its metal values in carbonate form, under such conditions that a froth bearing such carbonate is.
produced substantially dependent upon the presence'both of an organic mineral-frothing agent and an amount of the order of not less than a pound per ton of ore of an organic sulphhydric compound adapted to float such carbonate, to cause the flotation of such carbonate and of a relatively small proportion of the gangue; and separating the froth. v
2. The process of concentrating ores which values in carbonate form, under such conditions that a froth hearing such carbo'nateis produced substantially dependent uponthe presence both of an organic mineral-frothing agent and an amount of the order of not less than a pound per ton of ore of a'xanthate, to cause the flotation of such carbonate and of a relatively small proportion of the gangue; and separating the froth.
4. The process of concentrating ores which consists in agitating a pulp of'an ore containing a relatively large fraction of its metal values in carbonate form, under such conditions that a froth hearing such carbonate is produced substantially dependent u on the presence both of an organic mineralnothing agent and of about four pounds of an organic sulphhydric compoundadapted to float such carbonate, to cause the flotation of such carbonate and of a relatively small proportion of the gangue; and separating the froth.
' 5. The process of concentrating ores which consists in agitating a pulp of an ore containing a relatively large fraction of copper carbonate, under such conditions that a copper carbonate-bearing froth is produced substantially dependent upon the presence both of an organic mineral-frothing agent and of about four pounds per ton of a xanthate, to cause the flotation of such carbonate and of a relatively small proportion of the gangue; and separating the froth. 1
In testimony whereof, I have aflixed my signature to this specification.
WILLIAM TROTTER.
consists in agitating a pulp of an ore containing a relatively large fraction of copper carbonate, under such conditions that a co per-carbonate-bearing froth is produced su u on the presence both of an organicmineral-Frothing agent and an amount of the order of not less than a pound per ton of ore of an organic sulphhydric compound adapted to float such carbonate,
to cause the flotation of such carbonate and of a relatively small proportion of the gangue; and separating the froth.
3. The process of concentrating ores which consists in agitating a pulp of an ore containing' a relatively large fraction of its metal
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US127181A US1850991A (en) | 1926-08-04 | 1926-08-04 | Froth-flotation concentration of ores |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US127181A US1850991A (en) | 1926-08-04 | 1926-08-04 | Froth-flotation concentration of ores |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1850991A true US1850991A (en) | 1932-03-22 |
Family
ID=22428726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US127181A Expired - Lifetime US1850991A (en) | 1926-08-04 | 1926-08-04 | Froth-flotation concentration of ores |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1850991A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4090867A (en) * | 1975-04-30 | 1978-05-23 | Canadian Patents & Development Limited | Flotation of non-sulphide copper ores |
-
1926
- 1926-08-04 US US127181A patent/US1850991A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4090867A (en) * | 1975-04-30 | 1978-05-23 | Canadian Patents & Development Limited | Flotation of non-sulphide copper ores |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2070076A (en) | Separation of molybdenite from copper sulphides | |
| US2342277A (en) | Separation of pyrite, arsenopyrite, and pyrrhotite by flotation | |
| US2074699A (en) | Flotation process | |
| US2011176A (en) | Ore concentration | |
| US1652099A (en) | Process of concentrating ores and minerals by flotation | |
| US1850991A (en) | Froth-flotation concentration of ores | |
| US1364307A (en) | Flotation of minerals | |
| US1801318A (en) | Concentration of ores | |
| US1659396A (en) | Process of concentrating ores and minerals by flotation | |
| US2285394A (en) | Flotation method | |
| US2355365A (en) | Concentration of sylvinite ores | |
| GB498450A (en) | Improvements in or relating to processes of concentrating minerals from their ores | |
| US1788331A (en) | Concentration process for flotable substances as ores, coals, graphite, and the like | |
| US1652060A (en) | Process of concentrating ores and minerals by flotation | |
| US1668917A (en) | Froth-flotation concentration of ores | |
| US1469042A (en) | Differential flotation of ores | |
| US2105901A (en) | Froth flotation method | |
| GB223860A (en) | Improvements in or relating to the concentration of ores by froth-flotation | |
| US1852108A (en) | Froth flotation of ores | |
| US1370366A (en) | Flotation of minerals | |
| US1364859A (en) | Flotation of minerals | |
| US1970508A (en) | Flotation of ores | |
| US1807860A (en) | Separation of minerals | |
| US1364858A (en) | Flotation of minerals | |
| US2044851A (en) | Froth flotation concentration of ores |