US3375924A - Differential froth flotation of molybdenite and copper sulfides utilizing "nokes" reagent - Google Patents
Differential froth flotation of molybdenite and copper sulfides utilizing "nokes" reagent Download PDFInfo
- Publication number
- US3375924A US3375924A US447962A US44796265A US3375924A US 3375924 A US3375924 A US 3375924A US 447962 A US447962 A US 447962A US 44796265 A US44796265 A US 44796265A US 3375924 A US3375924 A US 3375924A
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- United States
- Prior art keywords
- nokes
- reagent
- molybdenite
- flotation
- copper
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- Expired - Lifetime
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- 239000003153 chemical reaction reagent Substances 0.000 title description 26
- 229910052961 molybdenite Inorganic materials 0.000 title description 20
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 title description 20
- BWFPGXWASODCHM-UHFFFAOYSA-N copper monosulfide Chemical class [Cu]=S BWFPGXWASODCHM-UHFFFAOYSA-N 0.000 title description 9
- 238000009291 froth flotation Methods 0.000 title description 6
- 238000005188 flotation Methods 0.000 description 24
- 239000012141 concentrate Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 17
- 229910052802 copper Inorganic materials 0.000 description 16
- 239000010949 copper Substances 0.000 description 16
- 229940108928 copper Drugs 0.000 description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 9
- 235000011941 Tilia x europaea Nutrition 0.000 description 9
- 239000004571 lime Substances 0.000 description 9
- 238000000926 separation method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000994 depressogenic effect Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 150000004763 sulfides Chemical class 0.000 description 4
- AALQBIFJJJPDHJ-UHFFFAOYSA-K trisodium;thiophosphate;dodecahydrate Chemical group O.O.O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[Na+].[O-]P([O-])([O-])=S AALQBIFJJJPDHJ-UHFFFAOYSA-K 0.000 description 4
- -1 COPPER SULFIDES Chemical class 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910052785 arsenic Inorganic materials 0.000 description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
- 238000003556 assay Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000881 depressing effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 2
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- HJTAZXHBEBIQQX-UHFFFAOYSA-N 1,5-bis(chloromethyl)naphthalene Chemical compound C1=CC=C2C(CCl)=CC=CC2=C1CCl HJTAZXHBEBIQQX-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical class [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- GOLCXWYRSKYTSP-UHFFFAOYSA-N arsenic trioxide Inorganic materials O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 235000014987 copper Nutrition 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- CYQAYERJWZKYML-UHFFFAOYSA-N phosphorus pentasulfide Chemical compound S1P(S2)(=S)SP3(=S)SP1(=S)SP2(=S)S3 CYQAYERJWZKYML-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Inorganic materials O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 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
- the invention relates to the separation by froth flotation of molybdenite from copper sulfides and other me tallic sulfides, such as iron sulfides, utilizing the so-called Nokes reagent as a depressant for the metallic sulfides other than molybdenite.
- Nokes reagent and process of employing same in the separation of molybdenite from other metallic sulfides, chiefly copper sulfides, by differential froth flotation are disclosed in detail by the Nokes et al. US. Patent No. 2,492,936. Such reagent and process have been and are being extensively employed in the milling of copper sul-.
- Nokes reagent a sodium thiophosphate produced by reacting sodium hydroxide and phosphorous pentasulfide.
- the Nokes reagent can be employed by adding it to a copper sulfide flotation concentrate containing molybdenite, without prior conditioning of such concentrate, it is ordinarily preferred to condition the concentrate by treatment with acid and alkali, all as set forth in the aforesaid Nokes patent, for removing froth collector coatings from the minerals prior to flotation with the Nokes reagent. Even so, some trouble has been encountered with excessive frothing, and the process of Nokes US. Patent No. 2,811,255 was developedto overcome such trouble. This involves preliminary cleansing of the concentrate and repulping with fresh water following elimination of the liquid phase of the so-cleansed concentrate prior to flotation for the recovery of the molybdenite.
- the present process utilizing the Nokes reagent not only overcomes, in large measure, the previously encountered trouble with excessive frothing, but gives cleaner separation of the molybdenite from the other sulfides and significantly improved recoveries, without resort to any preliminary cleansing of the concentrates.
- the Nokes et a1. process involves a pH for the flotation pulp of from about 9 to 10.5 and sometimes, but rarely, as high as 11. We have found, however, that a pH well above 11, usually not lower than 11.4 and often much higher, e.g. 12.4, provides highly useful results not heretofore achieved in the use of the Nokes reagent.
- the principal feature of this invention is conditioned for one the use of the Nokes reagent With a flotation pulp raised in pH from the normal lower range to a significantly higher range.
- the pH of the flotation pulp is raised in conventional manner by the addition of an alkaline reagent to the circult, preferably immediately prior to the molybdenite flotation step.
- the high pH float yields rougher concentrate containing a large part of the molybdenite. Such concentrate is easily upgraded by further flotation.
- alkaline reagent it is preferred to use either calcium or sodium hydroxide as the alkaline reagent, because of the ready availability and low cost of these materials. But a wide variety of other alkaline materials can be satisfactorily utilized.
- Lime circuits are usual for copper flotation and, because lime is alkaline, regular mill water from such circuits can be advantageously utilized in the present process. This is an important factor in most mills, where water must be conserved. It is also important from the standpoint of eliminating need for filtration and repulping of the general copper sulfide flotation concentrates.
- manageable froths result from making the molybdenite separation at high pH. It should be realized, however, that differences in type and grade of ore from place to place in the same ore body affect the operation and that there may be more froth at some times than at others.
- EXAMPLE I A sample of final copper concentrates, obtained as above and having a dry weight'of 955 grams, was diluted to 32% solids with mill water in a 600 gram laboratory Fagergren flotation machine. Two grams of lime (calcium hydroxide, U.S.P. powder) were added to the pulp and minute. The lime addition raised the pH of the pulp from its normal 10.4 to 11.95. Fifteen cubic centimeters of a dilute Nokes reagent (5.0 grams P 5 reacted with 6.5 grams of NaOH in cc. of water) was added to the pulp, together with three drops of stove oil. No frother was required. A flotation froth was pulled for five minutes. The following metallurgical results were shown by this test:
- An improved process of differential froth flotation of a flotation concentrate of molybdenite and copper sulfides utilizing a Nokes reagent as a depressant for the copper sulfides comprising subjecting a flotation pulp of mixed copper sulfides and molybdenite to at least a rougher stage of flotation in the presence of a collector for floating the molybdenite and of a Nokes reagent for depressing the copper sulfides, said pulp having a pH no lower than about 11.4.
- Nokes reagent is sodium thiophosphate
- Nokes reagent is the reaction product of sodium hydroxide, sulfur, and arsenic trioxide.
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- Paper (AREA)
Description
United States Patent DIFFERENTIAL FROTH FLOTATION 0F MOLYB- DENITE AND COPPER SULFIDES UTILIZING NOKES REAGENT Burton Corbett and James J. Bean, Miami, Ariz., assignors to Miami Copper Company, Division of Tennessee Corporation, New York, N.Y., a corporation of Delaware No Drawing. Filed Apr. 14, 1965, Ser. No. 447,962
8 Claims. (Cl. 209-167) ABSTRACT OF THE DISCLOSURE An improved process of differential froth flotation applied to a flotation pulp of molybdenite and copper sul' fides utilizing a Nokes reagent for depressing the cop per sulfides and a collector reagent for floating the molybdenite, wherein the flotation pulp is maintained at an unusually high pH, i.e. no lower than about 11.4 and preferably within a range of about 11.4 to 12.4.
The invention This invention relates to the separation by froth flotation of molybdenite from copper sulfides and other me tallic sulfides, such as iron sulfides, utilizing the so-called Nokes reagent as a depressant for the metallic sulfides other than molybdenite.
The Nokes reagent and process of employing same in the separation of molybdenite from other metallic sulfides, chiefly copper sulfides, by differential froth flotation are disclosed in detail by the Nokes et al. US. Patent No. 2,492,936. Such reagent and process have been and are being extensively employed in the milling of copper sul-.
fide ores and concentrates which contain molybdenite. Because of the ease of production and the low cost, the most popular form of the Nokes reagent are disclosed by that patent is a sodium thiophosphate produced by reacting sodium hydroxide and phosphorous pentasulfide.
Although the Nokes reagent can be employed by adding it to a copper sulfide flotation concentrate containing molybdenite, without prior conditioning of such concentrate, it is ordinarily preferred to condition the concentrate by treatment with acid and alkali, all as set forth in the aforesaid Nokes patent, for removing froth collector coatings from the minerals prior to flotation with the Nokes reagent. Even so, some trouble has been encountered with excessive frothing, and the process of Nokes US. Patent No. 2,811,255 was developedto overcome such trouble. This involves preliminary cleansing of the concentrate and repulping with fresh water following elimination of the liquid phase of the so-cleansed concentrate prior to flotation for the recovery of the molybdenite.
The present process utilizing the Nokes reagent not only overcomes, in large measure, the previously encountered trouble with excessive frothing, but gives cleaner separation of the molybdenite from the other sulfides and significantly improved recoveries, without resort to any preliminary cleansing of the concentrates.
The Nokes et a1. process, as disclosed in the patent and as practiced industrially, involves a pH for the flotation pulp of from about 9 to 10.5 and sometimes, but rarely, as high as 11. We have found, however, that a pH well above 11, usually not lower than 11.4 and often much higher, e.g. 12.4, provides highly useful results not heretofore achieved in the use of the Nokes reagent.
Accordingly, the principal feature of this invention is conditioned for one the use of the Nokes reagent With a flotation pulp raised in pH from the normal lower range to a significantly higher range.
The pH of the flotation pulp is raised in conventional manner by the addition of an alkaline reagent to the circult, preferably immediately prior to the molybdenite flotation step. The high pH float yields rougher concentrate containing a large part of the molybdenite. Such concentrate is easily upgraded by further flotation.
It is preferred to use either calcium or sodium hydroxide as the alkaline reagent, because of the ready availability and low cost of these materials. But a wide variety of other alkaline materials can be satisfactorily utilized.
Lime circuits are usual for copper flotation and, because lime is alkaline, regular mill water from such circuits can be advantageously utilized in the present process. This is an important factor in most mills, where water must be conserved. It is also important from the standpoint of eliminating need for filtration and repulping of the general copper sulfide flotation concentrates.
prior to flotation for the recovery of molybdenite.
As previously indicated, manageable froths result from making the molybdenite separation at high pH. It should be realized, however, that differences in type and grade of ore from place to place in the same ore body affect the operation and that there may be more froth at some times than at others.
It has been found that grinding in the final cleaning stages is often advantageous, and, also, that the use of sodium cyanide is sometimes helpful as an additional depressant for copper sulfides.
Numerous comparative tests have been run in the laboratory and in a pilot plant on samples of final copper concentrate taken at various times during usual mill operation from the pipe feeding the filters at the Copper Cities mill of the Miami Copper Company Division of Tennessee Corporation at Miami, Ariz. These have all demonstrated the utility and surprising character of the present process.
A typical test utilizing the invention was conducted as follows:
EXAMPLE I A sample of final copper concentrates, obtained as above and having a dry weight'of 955 grams, was diluted to 32% solids with mill water in a 600 gram laboratory Fagergren flotation machine. Two grams of lime (calcium hydroxide, U.S.P. powder) were added to the pulp and minute. The lime addition raised the pH of the pulp from its normal 10.4 to 11.95. Fifteen cubic centimeters of a dilute Nokes reagent (5.0 grams P 5 reacted with 6.5 grams of NaOH in cc. of water) was added to the pulp, together with three drops of stove oil. No frother was required. A flotation froth was pulled for five minutes. The following metallurgical results were shown by this test:
3 EXAMPLE II The following tabulation shows the results of three sets of comparative tests carried out in the laboratory in the same manner as the above, the first test of each set being without the pH adjustment of this invention:
1 Head calculated from assays and weights of Rougher Concentrates and [tougher Tail.
N Distribution, M08 percent Reagents, lbs/ton Set R0. Cone. R0. Tails N okes 02.0
Pilot plant operation has also demonstrated the effectiveness of the invention. Copper concentrate from the Copper Cities mill was taken as in the laboratory tests, but on a twenty-four hour basis. It was passed through a pilot plant having a capacity of one ton per hour and utilizing a flow scheme comprising rougher flotation using the Nokes reagent (sodium thiophosphate as before) as a copper depressant in a mill water circuit adjusted with lime to a high pH as compared with the normal, followed by five cleaning steps, regrinding of the fifth cleanerconcentrate, and three more cleaning steps to produce a final molybdenite concentrate.
The results tabulated below are from samplings over eight hour operating periods, and are representative of results that would be obtained in a commercial operation:
Other tests have shown that satisfactory molybdenitecopper separations can be made on metallurgical products very low in MoS content, irrespective of the copper mineralization, and that consistently good molybdenite recoveries can be obtained from all types and grades of sulfide copper concentrates. This is in contrast to results obtainable at the customary, relatively low pH of the flotation pulp.
'A series of tests was also made utilizing acid as in Example 7 of the Nokes et al. US. Patent No. 2,492,936 in comparison with no acid at both normal pH and the high pH of this invention. The Nokes reagent used in each instance was sodium thiophosphate. The results were as follows:
EXAMPLE IV Assay, Product Percent percent Distribu- Reagents,
Wt. MOSz tiou, percent lbs/ton Test No. 1 (pH 9.8)
100.00 0. 200 100. 0 Nokes (4.2). 1. 58 7.100 42. 8 H2804 (3.5). 98.42 0.150 57. 2 Lime (1.8).
Test No. 2 (pH 11.7)
100. 0 0.275 100.0 Nokes (3.35).
1. 81 12. 500 S2. 5 Lime (5.85). 98. 19 O. 050 17. 5 KD-38 (0.066)
Test No. 3 (pl-1 9.8)
Head 100.00 0.345 100.0 Nokes (5.8). R0. Conc. 4.82 6.800 94.8 KD-38 (0.076). R0. Tails"... 95. 18 0. 020 5. 2
Test No.4 (pH 11.7)
Head 100. 00 O. 344 100. 0 Nokes (5.6). R0. Cone"... 3. 97 8.200 94. 6 Lime (6.4). R0. Tails..." 90.03 0.020 5.4 KD-38 (0.073).
A comparison between use of the Nokes arsenic reagent, made in accordance with Example 20 of the Nokes et al. US. Patent No. 2,492,936, at normal pH and at high pH of the flotation pulp, showed results as follows:
EXAMPLE V Percent Assay, Distri- Pounds Product Wt. percent bution, Reagent per ton MoS percent Test No. 1 (pH 10.1)
0.279 100.0 N Arsenic"... 2. 19. 800 94.6 CaClz 5. 70 0.015 5.4 Lime 1. KD-3S 0.071
Test No. 2 (pH 11.5)
0.251 100.0 N Arsenic 2. 55 34. 900 90. 0 CaClz 5. 10 0. 025 10. 0 Lim 5. 70
For the purpose of showing the efiect of very high pH of the flotation pulp, a series of comparative tests were performed on grab samples taken from the same source of final copper concentrates as the foregoing examples. These tests and the results thereof were as follows:
CaO M502, percent Percent Dist.
Grams Lbs. lton Heads Tails Conct. Conct. Tails Nil Nil 10. 5 0. 279 0. 018 5. l 93. 7 6. 2.0 6.0 11.7 0. 235 0.020 8. 9 92. 0 8.0 6. 18. 12.0 0. 240 0.020 8. 1 92. 1 7. 9 24.0 72.0 12. 4 0.226 0. 020 12. 3 91. 0 9. 0
Whereas there are here described specific procedures presently regarded as the best mode of carrying out the invention, it should be understood that various changes can be made without departing from the inventive subject matter that is particularly pointed out and claimed herebelow.
We claim:
1. An improved process of differential froth flotation of a flotation concentrate of molybdenite and copper sulfides utilizing a Nokes reagent as a depressant for the copper sulfides, comprising subjecting a flotation pulp of mixed copper sulfides and molybdenite to at least a rougher stage of flotation in the presence of a collector for floating the molybdenite and of a Nokes reagent for depressing the copper sulfides, said pulp having a pH no lower than about 11.4.
2. A process according to claim 1, wherein the pH of the pulp is within the range of about 11.4 to 12.4.
3. A process according to claim 1, wherein the Nokes reagent is sodium thiophosphate.
4. A process according to claim 3, wherein the pH of the pulp is within the range of about 11.4 to 12.4.
5. A process according to claim 1, wherein the Nokes reagent is the reaction product of sodium hydroxide, sulfur, and arsenic trioxide.
6. A process according to claim 5, wherein the pH of the pulp is Within the range of about 11.4 to 12.4.
7. A process according to claim 1, wherein sodium cyanide is also present in the flotation pulp during the flotation operation as an aid in depressing the copper sulfides.
8. A process according to claim 7, wherein the pH of the pulp is within the range of about 11.4 to 12.4.
6 References Cited UNITED STATES PATENTS 12/1949 Nokes 209-467 10/1957 Nokes 209-167 10/1960 Henderson 209-167 11/1965 Moyer 209167 OTHER REFERENCES Froth Flot, 50th Anniversary Volume, Aimme, 1962, 10 pp. 386, 394, 395. TN 523 S 58.
HARRY B. THORNTON, Primary Examiner.
FRANK W. LUTTER, Examiner. 5 R. HALPER, Assistant Examiner.
UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 3,375 ,924 April 2 1968 Burton Corbett et a1.
It is certified that error appears in the above identified patent and that said Letters Patent are hereby corrected as shown below:
Column 3, second table, fifth Column, th numerical values should be dropped down one Space to be in alignment with the second, fourth, and sixth lines, respectively, of the table, and cancel the bracket; third table, third column, line 1 thereof, "9.050" should read 0.050 Column 4, third table, first line thereof, in the heading, "M50 should read MoS Signed and sealed this 26th day of August 1969.
(SEAL) Attest:
Edward M. Fletcher, Jr. WILLIAM E. SCHUYLER, JR.
Attesting Officer Commissioner of Patents
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US447962A US3375924A (en) | 1965-04-14 | 1965-04-14 | Differential froth flotation of molybdenite and copper sulfides utilizing "nokes" reagent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US447962A US3375924A (en) | 1965-04-14 | 1965-04-14 | Differential froth flotation of molybdenite and copper sulfides utilizing "nokes" reagent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3375924A true US3375924A (en) | 1968-04-02 |
Family
ID=23778459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US447962A Expired - Lifetime US3375924A (en) | 1965-04-14 | 1965-04-14 | Differential froth flotation of molybdenite and copper sulfides utilizing "nokes" reagent |
Country Status (1)
| Country | Link |
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| US (1) | US3375924A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3655044A (en) * | 1970-01-20 | 1972-04-11 | Anaconda Co | Separation of molybdenum sulfide from copper sulfide with depressants |
| FR2220313A1 (en) * | 1973-03-07 | 1974-10-04 | Weston David | Foam flotation of non-ferrous sulphide minerals - by conditioning the pulp in several stages using the stirrer energy for activation of the mineral |
| US3901450A (en) * | 1969-11-03 | 1975-08-26 | David Weston | Flotation with xanthate |
| US4425230A (en) | 1982-02-16 | 1984-01-10 | Oreprep Chemicals, Inc. | Separation of molybdenite from its mixture with other sulfide ores |
| US20090135590A1 (en) * | 2002-05-28 | 2009-05-28 | Kenall Manufacturing Co. | Selectively-Extendable Modular Lighting Fixture and Method |
| WO2015157498A1 (en) * | 2014-04-11 | 2015-10-15 | Tessenderlo Kerley, Inc. | Depression of copper and iron sulfides in molybdenite flotation circuits |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2492936A (en) * | 1948-10-16 | 1949-12-27 | Charles M Nokes | Differential froth flotation of sulfide ores |
| US2811255A (en) * | 1954-04-21 | 1957-10-29 | Charles M Nokes | Process for recovery of molybdenite from copper sulfide-molybdenite flotation concentrates |
| US2957576A (en) * | 1958-03-07 | 1960-10-25 | Anaconda Co | Recovery of molybdenite by flotation |
| US3220551A (en) * | 1962-12-06 | 1965-11-30 | American Cyanamid Co | Flotation of sulfide ores |
-
1965
- 1965-04-14 US US447962A patent/US3375924A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2492936A (en) * | 1948-10-16 | 1949-12-27 | Charles M Nokes | Differential froth flotation of sulfide ores |
| US2811255A (en) * | 1954-04-21 | 1957-10-29 | Charles M Nokes | Process for recovery of molybdenite from copper sulfide-molybdenite flotation concentrates |
| US2957576A (en) * | 1958-03-07 | 1960-10-25 | Anaconda Co | Recovery of molybdenite by flotation |
| US3220551A (en) * | 1962-12-06 | 1965-11-30 | American Cyanamid Co | Flotation of sulfide ores |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3901450A (en) * | 1969-11-03 | 1975-08-26 | David Weston | Flotation with xanthate |
| US3655044A (en) * | 1970-01-20 | 1972-04-11 | Anaconda Co | Separation of molybdenum sulfide from copper sulfide with depressants |
| FR2220313A1 (en) * | 1973-03-07 | 1974-10-04 | Weston David | Foam flotation of non-ferrous sulphide minerals - by conditioning the pulp in several stages using the stirrer energy for activation of the mineral |
| US4425230A (en) | 1982-02-16 | 1984-01-10 | Oreprep Chemicals, Inc. | Separation of molybdenite from its mixture with other sulfide ores |
| US20090135590A1 (en) * | 2002-05-28 | 2009-05-28 | Kenall Manufacturing Co. | Selectively-Extendable Modular Lighting Fixture and Method |
| US8550656B2 (en) | 2002-05-28 | 2013-10-08 | Kenall Manufacturing Company | Selectively-extendable modular lighting fixture |
| WO2015157498A1 (en) * | 2014-04-11 | 2015-10-15 | Tessenderlo Kerley, Inc. | Depression of copper and iron sulfides in molybdenite flotation circuits |
| US10717090B2 (en) | 2014-04-11 | 2020-07-21 | Tessenderlo Kerley, Inc. | Depression of copper and iron sulfides in molybdenite flotation circuits |
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