US2342277A - Separation of pyrite, arsenopyrite, and pyrrhotite by flotation - Google Patents
Separation of pyrite, arsenopyrite, and pyrrhotite by flotation Download PDFInfo
- Publication number
- US2342277A US2342277A US474491A US47449143A US2342277A US 2342277 A US2342277 A US 2342277A US 474491 A US474491 A US 474491A US 47449143 A US47449143 A US 47449143A US 2342277 A US2342277 A US 2342277A
- Authority
- US
- United States
- Prior art keywords
- arsenopyrite
- pyrite
- flotation
- pyrrhotite
- permanganate
- 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
- 229910052964 arsenopyrite Inorganic materials 0.000 title description 22
- MJLGNAGLHAQFHV-UHFFFAOYSA-N arsenopyrite Chemical compound [S-2].[Fe+3].[As-] MJLGNAGLHAQFHV-UHFFFAOYSA-N 0.000 title description 21
- 229910052683 pyrite Inorganic materials 0.000 title description 19
- 239000011028 pyrite Substances 0.000 title description 19
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 title description 17
- 229910052952 pyrrhotite Inorganic materials 0.000 title description 13
- 238000005188 flotation Methods 0.000 title description 11
- 238000000926 separation method Methods 0.000 title description 4
- 239000012141 concentrate Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 239000003153 chemical reaction reagent Substances 0.000 description 8
- 230000003750 conditioning effect Effects 0.000 description 7
- 238000009291 froth flotation Methods 0.000 description 7
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 230000001143 conditioned effect Effects 0.000 description 6
- 229910052785 arsenic Inorganic materials 0.000 description 5
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 239000012286 potassium permanganate Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010970 precious metal Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 230000000881 depressing effect Effects 0.000 description 2
- -1 dithiophosphates Substances 0.000 description 2
- 239000012991 xanthate Substances 0.000 description 2
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical class C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 1
- JYLNVJYYQQXNEK-UHFFFAOYSA-N 3-amino-2-(4-chlorophenyl)-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(CN)C1=CC=C(Cl)C=C1 JYLNVJYYQQXNEK-UHFFFAOYSA-N 0.000 description 1
- 101100275299 Caenorhabditis elegans col-10 gene Proteins 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 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 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- NAGJZTKCGNOGPW-UHFFFAOYSA-N dithiophosphoric acid Chemical compound OP(O)(S)=S NAGJZTKCGNOGPW-UHFFFAOYSA-N 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010665 pine oil Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- IRZFQKXEKAODTJ-UHFFFAOYSA-M sodium;propan-2-yloxymethanedithioate Chemical compound [Na+].CC(C)OC([S-])=S IRZFQKXEKAODTJ-UHFFFAOYSA-M 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur 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
-
- 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
- B03D1/002—Inorganic compounds
-
- 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
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
Definitions
- This invention relates to a process of separating pyrite from arsenopyrite and/or from pyrrhotite by froth flotation.
- sulfide ores contain mixtures of pyrite and arsenopyrite and in some cases mixtures of pyrite, arsenopyrite and pyrrhotite. It is desirable to obtain concentrates of the minerals separately because of the different uses to which the minerals may be put. Thus, for example, if -pyrite is to be burned to sulfadioxide for the production of sulfuric acid by the contact process the presence of arsenic is undesirable and pyrite containing considerable amounts of arsenopyrite is not suitable for this purpose.
- the mixed ores may in some cases contain precious metal values, particularly gold or silver, and it is common in such cases for the precious metals to be primarily associated with the arsenopyrite. Inasmuch as the precious metal content of such ores frequently represents a considerable portion of the values it is important to obtain a concentrate which contains a large portion of the arsenopyrite.
- froth flotation is effected after conditioning with a small amount of a permanganate such as sodium or potassium permanganate.
- a permanganate such as sodium or potassium permanganate.
- the permanganate depresses the arsenopyrite and pyrrhotite, whereas pyrite is but little affected and can thereafter be recovered as a concentrate by froth flotation.
- this procedure results in a. satisfactory practical procem.
- permanganate used will, of course, vary with the nature of the ore and with the relative contents of arsenopyrite and pyrrhotite. In general a satisfactory depression of ars'enopyrite is obtainable with amounts of permanganate of the order of a quarter of a pound per ton or less. Selective depression of pyrrhotite without depressing arsenopyrite will ordinarily require amounts of permanganate less than 0.05 pound per ton.
- the flotation operation on the conditioned pulp is not-critical and the normal sulfide flotation reagents may be used such as xanthates, dithiophosphates, mercapto-benzothiazoles, and the like. While ordinary sulfide reagents may be used, they differ somewhat in eflfectiveness, and I have found that the best results are obtained with dithiophosphoric acids, dithiophosphates, or mixtures of dithiophosphates with mercaptcbenzothiazole and reagents of this type are preferred.
- EXAMPLE 1 An ore containing pyrite, arsenopyrite and pyrrhotite, associated with a gangue which also contained iron and sulfur, was treated for high arsenopyrite recovery.
- the arsenic content represented the major value or the ore under present economic conditions.
- the ore was first subjected to a bulk sulfide flotation with stage oiling using dicresyldithiophosphoric acid and sodium iso- V propyl xanthate as promoters.
- the concentrate was then conditioned with 0.02 lb. ofpotassium permanganate and floated in two stages usin a small. additional amount of the dicresyldithiophosphoric acid.
- the purpose of the flotation was to produce a nvrite-arsenopyrite concentrate with a maximum rejection of the pyrrhotite.
- the cleaner concentrate contained only 4.56% of arsenic and but little rejection of pyrrhotite took place.
- EXAMPLE 2 and the pyrite concentration was even higher, amounting to 196 to 1.
- Flotation operations in the examples were carried out under standard conditions using Fagergren flotation machines and operating conditions such as air and the like were the same for both.
- a method of separating pyrite from arsenopyrite which comprises subjecting a mixture containing both to conditioning with a sufliclent alkali metal permanganate to depress the ar'senopyrite and subjecting the conditioned material to froth flotation in the presence of a promoter for Conditions and reagents Conditions n Reagents, pounds per ton Point of additions v 'fgfi f g gg pH cuso. mic 0. AF 15 34s KMn0 P. o 404 3 0- 4.0 g. v 0.111 p 0. 05 i 0. 015 '2 0. 039 10 0. 06 00nd. 01. 00110. 1 0. 054 0.03 Py. flotation 3 0.02 added at 5 minutes.
- AF 15 is a dicresyldithiophosphoric acid diluted withcresols. 343" is sodium isopropyl xanthate.
- P. 0. stands for pine oil and pyrite, whereby a concentrate is obtained rich in pyrite and a tailing rich in ars'enopyrite.
- a method of separating pyrite, arsenopyrite and pyrrhotite which comprises subjecting a mix 404" for an undiluted mixed sodium mercaptoture containing the three minerals to conditioning with a small vamount of an alkali metal permanganate sumcient to depress the pyrrhotite but insuflicient to substantially depress the arsenopyrite, subjecting the conditioned material to froth flotation in the presence of a sulfide propyrite and subjecting the conditioned material to- ,froth flotation in the presence oi a sulfide col- 10 acid radical.
- a method according .to claim 1 which the froth flotation takes place in the presence of a collector" containing the dithiophosphoric acid 4.
- a method according to claim 2 in which both flotation operations are eflected in the presence oi a collector containing the dithiophosphoric EARL c. rmnxnmror'r'.
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
' Patented Febi22,1944
SEPARATION OF PYRITE, ARSENOPYRITE,
AND PYRRHOTITE BY FLOTATION Earl G. Herkenhofl, Stamford, Conn., assignor to American Cyanamid- Company, New York N. Y a corporation of Maine No Drawing. Application February 2, 1943, Serial No. 474,491
4 Claims.
This invention relates to a process of separating pyrite from arsenopyrite and/or from pyrrhotite by froth flotation.
Many sulfide ores contain mixtures of pyrite and arsenopyrite and in some cases mixtures of pyrite, arsenopyrite and pyrrhotite. It is desirable to obtain concentrates of the minerals separately because of the different uses to which the minerals may be put. Thus, for example, if -pyrite is to be burned to sulfadioxide for the production of sulfuric acid by the contact process the presence of arsenic is undesirable and pyrite containing considerable amounts of arsenopyrite is not suitable for this purpose. The mixed ores may in some cases contain precious metal values, particularly gold or silver, and it is common in such cases for the precious metals to be primarily associated with the arsenopyrite. Inasmuch as the precious metal content of such ores frequently represents a considerable portion of the values it is important to obtain a concentrate which contains a large portion of the arsenopyrite.
It has been proposed in the past to depress one or other of the minerals by the addition of agents such as lime )r sodium cyanide. These procedures do result in some separation but the separation is not sharp and leaves much to be desired.
According to th present invention froth flotation is effected after conditioning with a small amount of a permanganate such as sodium or potassium permanganate. The permanganate depresses the arsenopyrite and pyrrhotite, whereas pyrite is but little affected and can thereafter be recovered as a concentrate by froth flotation. In the case of ores containing onlypyrite and arsenopyrite this procedure results in a. satisfactory practical procem.
It has further been found that the depressing action of the permanganate is not the same for producing a concentrate containing pyrite and arsenopyrite which can then be conditioned with larger amounts of permanganate and again floated to produce a pyrite concentrate.
The amount of permanganate used will, of course, vary with the nature of the ore and with the relative contents of arsenopyrite and pyrrhotite. In general a satisfactory depression of ars'enopyrite is obtainable with amounts of permanganate of the order of a quarter of a pound per ton or less. Selective depression of pyrrhotite without depressing arsenopyrite will ordinarily require amounts of permanganate less than 0.05 pound per ton.
It is an advantage of the present invention that the flotation operation on the conditioned pulp is not-critical and the normal sulfide flotation reagents may be used such as xanthates, dithiophosphates, mercapto-benzothiazoles, and the like. While ordinary sulfide reagents may be used, they differ somewhat in eflfectiveness, and I have found that the best results are obtained with dithiophosphoric acids, dithiophosphates, or mixtures of dithiophosphates with mercaptcbenzothiazole and reagents of this type are preferred.
The invention will be described in greater detail in conjunction with the following specific examples. The parts are by weight.
EXAMPLE 1 An ore containing pyrite, arsenopyrite and pyrrhotite, associated with a gangue which also contained iron and sulfur, was treated for high arsenopyrite recovery. The arsenic content represented the major value or the ore under present economic conditions. The ore was first subjected to a bulk sulfide flotation with stage oiling using dicresyldithiophosphoric acid and sodium iso- V propyl xanthate as promoters. The concentrate was then conditioned with 0.02 lb. ofpotassium permanganate and floated in two stages usin a small. additional amount of the dicresyldithiophosphoric acid. The purpose of the flotation was to produce a nvrite-arsenopyrite concentrate with a maximum rejection of the pyrrhotite. The sequence. of conditioning and amounts of re.-
Conditions and reagents benzothlazole dlsecondarybutyldithiophoshate reagent.
Conditions Reagents, pounds per ton Point at addition Time, minutes NB CO Condition nd. eoneentrate. Cl. flotation I .The promoters are referred to by tradedesig- Metallurgical results nation. "AF is dicresyldithiophosphoric acid diluted withcresols. "343 is sodium'isopropyl 2 Per Assays xantha'te- Product cent gi Metallurgical results Weight is Assays good).--" 1034511: 8.5; Product Weight 26 ii'colfii::::::'"""'::::::::::::::::::::::::: 1:13 18:10 As Fe S 01. Tall. 3.59 0. 37 Rgh.Tail 94.71 0 015 Comb. Cone .i-. 1.70 12.77 Per cent Percent Percent Rgh. Cone 5.29 4.36 1 0.24 15.95 3.28
g '15'653 353 3523 so It illb t th t h h d r w eapparena a 1g egree 0 con- Rgh'Tafl 9M7 M06 centration of arsenopyrite was obtained, 84 to 1,
It will be apparent that a very effective depression of pyrrhotite took place and a major portion of the arsenic was recovered in a relatively high grade arsenopyrlte-pyrite concentrate.
When the same procedure was carried out but the potassium permanganate conditioning omitted the cleaner concentrate contained only 4.56% of arsenic and but little rejection of pyrrhotite took place. EXAMPLE 2 and the pyrite concentration was even higher, amounting to 196 to 1.
A blank test which followed the same sequence but omitted the potassium permanganate conditioning gave an arsenopyrite concentrate having only 1.17% of arsenic, more than 92% of the arsenopyrite remaining in the pyrite concentrate.
Flotation operations in the examples were carried out under standard conditions using Fagergren flotation machines and operating conditions such as air and the like were the same for both.
blank tests and those using permanganate conditioning. b
In the examples potassium permanganate has been described because of its ready availability. sodium permanganate gives the same result and inlarge scale use presents some economies.
I claim:
1. A method of separating pyrite from arsenopyrite which comprises subjecting a mixture containing both to conditioning with a sufliclent alkali metal permanganate to depress the ar'senopyrite and subjecting the conditioned material to froth flotation in the presence of a promoter for Conditions and reagents Conditions n Reagents, pounds per ton Point of additions v 'fgfi f g gg pH cuso. mic 0. AF 15 34s KMn0 P. o 404 3 0- 4.0 g. v 0.111 p 0. 05 i 0. 015 '2 0. 039 10 0. 06 00nd. 01. 00110. 1 0. 054 0.03 Py. flotation 3 0.02 added at 5 minutes.
The promoters are referred to by trade designation. AF 15 is a dicresyldithiophosphoric acid diluted withcresols. 343" is sodium isopropyl xanthate. P. 0. stands for pine oil and pyrite, whereby a concentrate is obtained rich in pyrite and a tailing rich in ars'enopyrite.
2. A method of separating pyrite, arsenopyrite and pyrrhotite which comprises subjecting a mix 404" for an undiluted mixed sodium mercaptoture containing the three minerals to conditioning with a small vamount of an alkali metal permanganate sumcient to depress the pyrrhotite but insuflicient to substantially depress the arsenopyrite, subjecting the conditioned material to froth flotation in the presence of a sulfide propyrite and subjecting the conditioned material to- ,froth flotation in the presence oi a sulfide col- 10 acid radical.
iector whereby a concentrate is produced rich in 1 Pyrite and a tailing containing thearsenopyrlte.
3. A method according .to claim 1 m which the froth flotation takes place in the presence of a collector" containing the dithiophosphoric acid 4. A method according to claim 2 in which both flotation operations are eflected in the presence oi a collector containing the dithiophosphoric EARL c. rmnxnmror'r'.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US474491A US2342277A (en) | 1943-02-02 | 1943-02-02 | Separation of pyrite, arsenopyrite, and pyrrhotite by flotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US474491A US2342277A (en) | 1943-02-02 | 1943-02-02 | Separation of pyrite, arsenopyrite, and pyrrhotite by flotation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2342277A true US2342277A (en) | 1944-02-22 |
Family
ID=23883753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US474491A Expired - Lifetime US2342277A (en) | 1943-02-02 | 1943-02-02 | Separation of pyrite, arsenopyrite, and pyrrhotite by flotation |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2342277A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2652150A (en) * | 1948-04-03 | 1953-09-15 | Saskatchewan Potash | Froth flotation of sylvinite ore |
| US3220551A (en) * | 1962-12-06 | 1965-11-30 | American Cyanamid Co | Flotation of sulfide ores |
| US4351483A (en) * | 1980-06-04 | 1982-09-28 | Cia Minera Rio Colorado, S.A. | Separation of arsenic from fluorite ore, by means of magnetic separation and flotation of the pyrites to which it is associated |
| FR2620353A1 (en) * | 1987-09-14 | 1989-03-17 | Elf Aquitaine | Flotation method for a mixture of ores containing both arsenoypyrite and pyrite for the purposes of separating these two substances from each other |
| US4904374A (en) * | 1987-10-08 | 1990-02-27 | Sentrachem Limited | Froth flotation |
| US5171428A (en) * | 1991-11-27 | 1992-12-15 | Beattie Morris J V | Flotation separation of arsenopyrite from pyrite |
| US7004326B1 (en) * | 2004-10-07 | 2006-02-28 | Inco Limited | Arsenide depression in flotation of multi-sulfide minerals |
| US20110155651A1 (en) * | 2009-12-04 | 2011-06-30 | Barrick Gold Corporation | Separation of copper minerals from pyrite using air-metabisulfite treatment |
| CN106269289A (en) * | 2016-10-31 | 2017-01-04 | 长春黄金研究院 | A kind of cyanogen slag pyritous method of broken cyanide flotation |
| CN106540814A (en) * | 2016-11-02 | 2017-03-29 | 广西大学 | A kind of preparation method of mispickel inhibitor |
| CN108097453A (en) * | 2018-02-12 | 2018-06-01 | 包头市汇林薪宝矿业有限责任公司 | The method that magnetic iron ore is removed from iron concentrate containing high sulphur |
| WO2019028497A1 (en) * | 2017-08-08 | 2019-02-14 | Cobalt Blue Holdings Ltd | Recovery of metals from pyrite |
| US10434521B2 (en) * | 2015-10-13 | 2019-10-08 | Outotec (Finland) Oy | Differential flotation of sulfide ores for recovering refractory gold |
| CN110496700A (en) * | 2019-07-17 | 2019-11-26 | 铜陵有色金属集团股份有限公司 | The method and its application of gold are recycled from high arsenic gold concentrator tailings |
| US10822673B1 (en) * | 2019-12-17 | 2020-11-03 | American Air Liquide, Inc. | Arsenic removal from lead concentrate by ozone treatment and reverse flotation |
-
1943
- 1943-02-02 US US474491A patent/US2342277A/en not_active Expired - Lifetime
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2652150A (en) * | 1948-04-03 | 1953-09-15 | Saskatchewan Potash | Froth flotation of sylvinite ore |
| US3220551A (en) * | 1962-12-06 | 1965-11-30 | American Cyanamid Co | Flotation of sulfide ores |
| US4351483A (en) * | 1980-06-04 | 1982-09-28 | Cia Minera Rio Colorado, S.A. | Separation of arsenic from fluorite ore, by means of magnetic separation and flotation of the pyrites to which it is associated |
| FR2620353A1 (en) * | 1987-09-14 | 1989-03-17 | Elf Aquitaine | Flotation method for a mixture of ores containing both arsenoypyrite and pyrite for the purposes of separating these two substances from each other |
| US4904374A (en) * | 1987-10-08 | 1990-02-27 | Sentrachem Limited | Froth flotation |
| US5171428A (en) * | 1991-11-27 | 1992-12-15 | Beattie Morris J V | Flotation separation of arsenopyrite from pyrite |
| WO1993010904A1 (en) * | 1991-11-27 | 1993-06-10 | Cheni Gold Mines Inc. | Flotation separation of arsenopyrite from pyrite |
| AU649175B2 (en) * | 1991-11-27 | 1994-05-12 | Cheni Resources Inc. | Flotation separation of arsenopyrite from pyrite |
| US7004326B1 (en) * | 2004-10-07 | 2006-02-28 | Inco Limited | Arsenide depression in flotation of multi-sulfide minerals |
| US9346062B2 (en) | 2009-12-04 | 2016-05-24 | Barrick Gold Corporation | Separation of copper minerals from pyrite using air-metabisulfite treatment |
| US20110155651A1 (en) * | 2009-12-04 | 2011-06-30 | Barrick Gold Corporation | Separation of copper minerals from pyrite using air-metabisulfite treatment |
| US10258996B2 (en) | 2009-12-04 | 2019-04-16 | Barrick Gold Corporation | Separation of copper minerals from pyrite using air-metabisulfite treatment |
| US10434521B2 (en) * | 2015-10-13 | 2019-10-08 | Outotec (Finland) Oy | Differential flotation of sulfide ores for recovering refractory gold |
| CN106269289A (en) * | 2016-10-31 | 2017-01-04 | 长春黄金研究院 | A kind of cyanogen slag pyritous method of broken cyanide flotation |
| CN106540814A (en) * | 2016-11-02 | 2017-03-29 | 广西大学 | A kind of preparation method of mispickel inhibitor |
| CN106540814B (en) * | 2016-11-02 | 2018-11-27 | 广西大学 | A kind of preparation method of mispickel inhibitor |
| WO2019028497A1 (en) * | 2017-08-08 | 2019-02-14 | Cobalt Blue Holdings Ltd | Recovery of metals from pyrite |
| CN108097453A (en) * | 2018-02-12 | 2018-06-01 | 包头市汇林薪宝矿业有限责任公司 | The method that magnetic iron ore is removed from iron concentrate containing high sulphur |
| CN110496700A (en) * | 2019-07-17 | 2019-11-26 | 铜陵有色金属集团股份有限公司 | The method and its application of gold are recycled from high arsenic gold concentrator tailings |
| US10822673B1 (en) * | 2019-12-17 | 2020-11-03 | American Air Liquide, Inc. | Arsenic removal from lead concentrate by ozone treatment and reverse flotation |
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