US1449797A - Archibald comley vivian - Google Patents
Archibald comley vivian Download PDFInfo
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- US1449797A US1449797A US1449797DA US1449797A US 1449797 A US1449797 A US 1449797A US 1449797D A US1449797D A US 1449797DA US 1449797 A US1449797 A US 1449797A
- Authority
- US
- United States
- Prior art keywords
- ore
- flotation
- comley
- vivian
- archibald
- 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
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- 239000012141 concentrate Substances 0.000 description 26
- 238000005188 flotation Methods 0.000 description 26
- 239000000047 product Substances 0.000 description 26
- 239000000463 material Substances 0.000 description 24
- 238000000354 decomposition reaction Methods 0.000 description 20
- 239000001301 oxygen Substances 0.000 description 20
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 20
- 229910052760 oxygen Inorganic materials 0.000 description 20
- 238000000034 method Methods 0.000 description 16
- 150000002894 organic compounds Chemical class 0.000 description 16
- XOLBLPGZBRYERU-UHFFFAOYSA-N Tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 14
- 239000000470 constituent Substances 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- 150000001875 compounds Chemical class 0.000 description 12
- 238000000926 separation method Methods 0.000 description 10
- 229910001887 tin oxide Inorganic materials 0.000 description 10
- LQDIWLPXNVRMQE-SOFGYWHQSA-N N-[(E)-2-nitroso-1-phenylethenyl]hydroxylamine Chemical compound O=N/C=C(/NO)C1=CC=CC=C1 LQDIWLPXNVRMQE-SOFGYWHQSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000005755 formation reaction Methods 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 8
- 159000000000 sodium salts Chemical class 0.000 description 8
- HYBBIBNJHNGZAN-UHFFFAOYSA-N Furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 6
- 150000001299 aldehydes Chemical class 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 150000002576 ketones Chemical class 0.000 description 6
- 150000002736 metal compounds Chemical class 0.000 description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000008234 soft water Substances 0.000 description 6
- 229910052718 tin Inorganic materials 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N tin hydride Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 6
- 239000011276 wood tar Substances 0.000 description 6
- GDEBSAWXIHEMNF-UHFFFAOYSA-O Cupferron Chemical compound [NH4+].O=NN([O-])C1=CC=CC=C1 GDEBSAWXIHEMNF-UHFFFAOYSA-O 0.000 description 4
- HYZNZSCQHJHUGQ-UHFFFAOYSA-N N(=O)C1=CC(=C(C=C1O)O)N=O Chemical compound N(=O)C1=CC(=C(C=C1O)O)N=O HYZNZSCQHJHUGQ-UHFFFAOYSA-N 0.000 description 4
- 125000003368 amide group Chemical group 0.000 description 4
- 238000004166 bioassay Methods 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 125000000853 cresyl group Chemical class C1(=CC=C(C=C1)C)* 0.000 description 4
- 238000009291 froth flotation Methods 0.000 description 4
- AVXURJPOCDRRFD-UHFFFAOYSA-N hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- -1 nitroso phenyl hydroxylamine phenyl glyoxime Chemical compound 0.000 description 4
- 239000001272 nitrous oxide Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- JAJWGJBVLPIOOH-IZYKLYLVSA-M sodium taurocholate Chemical compound [Na+].C([C@H]1C[C@H]2O)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC(=O)NCCS([O-])(=O)=O)C)[C@@]2(C)[C@@H](O)C1 JAJWGJBVLPIOOH-IZYKLYLVSA-M 0.000 description 4
- 229910001784 vanadium mineral Inorganic materials 0.000 description 4
- 229960003563 Calcium Carbonate Drugs 0.000 description 2
- 240000000731 Fagus sylvatica Species 0.000 description 2
- 235000010099 Fagus sylvatica Nutrition 0.000 description 2
- RUFIRPVAEJIIIS-OWOJBTEDSA-N N-[(E)-2-nitrosoethenyl]hydroxylamine Chemical compound ON\C=C\N=O RUFIRPVAEJIIIS-OWOJBTEDSA-N 0.000 description 2
- OXNIZHLAWKMVMX-UHFFFAOYSA-N Picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 235000009508 confectionery Nutrition 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 150000001923 cyclic compounds Chemical class 0.000 description 2
- 238000010908 decantation Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 125000004435 hydrogen atoms Chemical group [H]* 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 230000001264 neutralization Effects 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001590 oxidative Effects 0.000 description 2
- 150000002923 oximes Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229940114148 picric acid Drugs 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000001737 promoting Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002641 tar oil Substances 0.000 description 2
- 229910001662 tin mineral Inorganic materials 0.000 description 2
- 229950002929 trinitrophenol Drugs 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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
- B03D1/01—Organic compounds containing nitrogen
-
- 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
Definitions
- This invention relates to the separation of the more valuable constituents of ores, concentrates, metallurgical products and like heterogeneous materials from the less valuable components thereof by methods involving flotation and more particularly froth flotation.
- the object of the present invention is to provide an improved process of treating ores, concentrates, metallurgical products and the like in which the more valuable metals which it is desired to separate are in the form of oxygen-containing compounds.
- the invention consists broadly in the addition to the material (if necessary after any suitable modification such as that here inafter described) of organic compounds which are generally considered weakly acid but are amphoteric or display aci-pseudo forms, contain nitrogen and oxygen and act chemically upon the metal or metal compound it is desired to separate forming tarry or resinous complexes or decomposition products which facilitate the separation of the metal or metal compounds by flotation, when used alone or in conjunction with known oiling or frothing agents.
- the material may need to be modified by the addition of reagents adapted to promote interaction between the weakly acid body and the metal or metal compounds inv the material treated andtending, for in stance, to bring such metal into solution so that a precipitate may be formed by the action of the organic compound.
- the organic compounds adapted to form tarry or resinous complexes or decomposition products may be formed in the presence of the ore or other heterogeneous material or they may be prepared previously and added to the ore or other heterogeneous material.
- the reacting materials adapted to form the said organic compounds may be added to the ore or the like, or they may be brought together in the absence of the ore or the like so as to form the desired Application filed January 12, 1923. Serial No. 612,316.
- the organic bodies adapted for use in accordance with the invention possess, generally speaking, a relatively high molecular weight for the reason that as a general rule organic compounds of relatively high molecular Weight are more prone to yield tarry or resinous complexes or decomposition products than are bodies of lower molecular weight and as a rule cyclic compounds and certain unsaturated chain compounds are more inclined to yield such complexes than are saturated chain compounds.
- oximes, iso-nitroso bodies and amido acids are suitable.
- taurocholic acid may be mentioned, and as examples of other suitable bodies, cupferron (i. e. the ammonium salt of nitroso phenyl hydroxylamine phenyl glyoxime) and dinitroso resorcinol may be given.
- cupferron i. e. the ammonium salt of nitroso phenyl hydroxylamine phenyl glyoxime
- dinitroso resorcinol may be given.
- the organic compounds may be such that they spontaneously give rise to the formation of tarry or resinous complexes or decomposition products by interaction with constituents of the ore, as for instance, oxides, cassiterite, for example, without so far as can be ascertained the intervention of free oxygen.
- constituents of the ore as for instance, oxides, cassiterite, for example, without so far as can be ascertained the intervention of free oxygen.
- they may be such that oxygen clearly promotes the formation of such complexes or decomposition products, in which case an oxidation agent may be employed.
- the oxygen of the air used in frothing being in some instances suflicient.
- t may be found desirable with certain organic bodies to use reagents other than oxygen for promoting the formation of tarry or resinous complexes, but it would appear preferable in practice to use such bodies as need at most atmospheric oxygen or the constituents of the ore or the like to effect their conversion.
- the organic bodies may be formed by reactions between ketones or aldehydes and hydroxylamine or nitrous oxide and under the oxidizing conditions of the flotation process I may also use either ketones or aldehydes (also substances which by virtue of a labile hydrogen atom are known to behave to hydroxylamine or nitrous oxide as ketones and aldehydes) together with ammonia.
- t is advisable to crush the ore in the least possible amount of water so that the concentration of the phenyl glyoxime may be as high as possible and it is also advisable to avoid contamination with iron which is possible with steel tube milling.
- the tin oxide mineral will be found to have been prepared by this treatment so that subsequent treatment in a flotation process,
- a sweet roasted flotation concentrate is washed several times with soft water by decantation or similar methods (the settlement of the slime being no difficulty on account of the fiocculated state existing owing to soluble salts remaining in small traces even after repeated washings).
- Soft water to the amount of about four or five times the weight of the concentrate is added and, with or without preliminary gravity concentration of the pulp so prepared to eliminate the coarsest particles of tin oxide, the sodium salt of dinitroso resorcinol to the amount of one-tenth of a pound or more per ton of concentrate is added and the pulp is stirred. Phenolic and wood tar frothers will then be found to function satisfactorily in raising the tin oxide into the'froths The following tin assays indicate the char acter of the results obtained:
- the tailings contained no tin oxide slime nor free coarse tin oxide but only heavy middlings, needing recrushing, and as 22 tons of rough pannings and flotation concentrate were obtained from 100 tons of raw concentrate the efficiency of the recovery without recrushing of middlings was about 66 per cent.
- a vanadium mineral is treated as indicated in the above examples, cupferron being substituted for the sodium salt of phenyl glyoxime and phenolic and wood tar frothers. being employed to bring the vanadium minerals substantially into the froth.
- Taurocholic acid as its sodium salt or the mixed amldo acids of animal gall are addedin a convenient proportion to a crushed to effect the desired separation owing to their affinity for calcium carbonate.
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
Patented Mar. 27, 1923.
UNITED STATES ARCHIBALD COMLEY VIVIAN, OF BARNES, LONDON, ENGLAND.
FLOTATION PROCESS FOR CONCENTRATING ORES AND THE LIKE.
' No Drawing.
To all 10h am it may concern:
Be it known that I, ARCHIBALD COMLEY VIVIAN, a subject of the King of Great Britain and Ireland, and residing at 32 Castleton Mansions, Riverview Gardens, Barnes,
London, S. W., England, have invented certain new and useful Improvements in or Relating to Flotation Processes for Concentrating Ores and the like, of which the following is a specification.
This invention relates to the separation of the more valuable constituents of ores, concentrates, metallurgical products and like heterogeneous materials from the less valuable components thereof by methods involving flotation and more particularly froth flotation.
The object of the present invention is to provide an improved process of treating ores, concentrates, metallurgical products and the like in which the more valuable metals which it is desired to separate are in the form of oxygen-containing compounds.
The invention consists broadly in the addition to the material (if necessary after any suitable modification such as that here inafter described) of organic compounds which are generally considered weakly acid but are amphoteric or display aci-pseudo forms, contain nitrogen and oxygen and act chemically upon the metal or metal compound it is desired to separate forming tarry or resinous complexes or decomposition products which facilitate the separation of the metal or metal compounds by flotation, when used alone or in conjunction with known oiling or frothing agents.
In some cases the material may need to be modified by the addition of reagents adapted to promote interaction between the weakly acid body and the metal or metal compounds inv the material treated andtending, for in stance, to bring such metal into solution so that a precipitate may be formed by the action of the organic compound.
The organic compounds adapted to form tarry or resinous complexes or decomposition products, may be formed in the presence of the ore or other heterogeneous material or they may be prepared previously and added to the ore or other heterogeneous material.
In other Words, the reacting materials adapted to form the said organic compounds may be added to the ore or the like, or they may be brought together in the absence of the ore or the like so as to form the desired Application filed January 12, 1923. Serial No. 612,316.
bodies which are, when formed, employed in treating the ore or the like.
As would be expected, the organic bodies adapted for use in accordance with the invention, possess, generally speaking, a relatively high molecular weight for the reason that as a general rule organic compounds of relatively high molecular Weight are more prone to yield tarry or resinous complexes or decomposition products than are bodies of lower molecular weight and as a rule cyclic compounds and certain unsaturated chain compounds are more inclined to yield such complexes than are saturated chain compounds.
For the purpose of indicating more clearly the character of the bodies which are capable of use in accordance with the invention,
it may be stated that oximes, iso-nitroso bodies and amido acids are suitable.
As an example of a suitable amido acid, taurocholic acid may be mentioned, and as examples of other suitable bodies, cupferron (i. e. the ammonium salt of nitroso phenyl hydroxylamine phenyl glyoxime) and dinitroso resorcinol may be given.
The organic compounds may be such that they spontaneously give rise to the formation of tarry or resinous complexes or decomposition products by interaction with constituents of the ore, as for instance, oxides, cassiterite, for example, without so far as can be ascertained the intervention of free oxygen. On the other hand, they may be such that oxygen clearly promotes the formation of such complexes or decomposition products, in which case an oxidation agent may be employed. the oxygen of the air used in frothing being in some instances suflicient.
t may be found desirable with certain organic bodies to use reagents other than oxygen for promoting the formation of tarry or resinous complexes, but it would appear preferable in practice to use such bodies as need at most atmospheric oxygen or the constituents of the ore or the like to effect their conversion.
The organic bodies may be formed by reactions between ketones or aldehydes and hydroxylamine or nitrous oxide and under the oxidizing conditions of the flotation process I may also use either ketones or aldehydes (also substances which by virtue of a labile hydrogen atom are known to behave to hydroxylamine or nitrous oxide as ketones and aldehydes) together with ammonia.
' amounts of The following particulars are given by way of example to illustrate suitable methods of carrying the invention into effect:
Emample 1.
An oxidized ore of tin such as that of the fiat lode in Cornwall, is crushed to a fine pulp with very soft water (such as that ohtainable in Cornwall) or with distilled water, in which is dissolved the sodium salt of phenyl glyoxime in a proportion equivalent to one-tenth of a pound or more of phenyl glyoxime per ton of dry ore, the salt in question being added as such or formed by the addition to the pulp of equivalent henyl glyoxime and sodium hydroxide. t is advisable to crush the ore in the least possible amount of water so that the concentration of the phenyl glyoxime may be as high as possible and it is also advisable to avoid contamination with iron which is possible with steel tube milling. The tin oxide mineral will be found to have been prepared by this treatment so that subsequent treatment in a flotation process,
. using phenolic or wood tar frothers or a mixture of the two, will be effective in bringing substantially all the tin mineral into the froth and leaving substantially all the gangue minerals behind.
As indicating the character of the results obtainable it may be mentioned that when phenyl glyoxime sodium salt was employed in the proportion of lb. per. ton of ore in an otherwise neutral or only very slightly alkaline circuit and cresol or a mixture of beech tar oil and cresol was used for frothing to the amount of 3 lbs. per ton of the ore, the tin assay was as follows Ore 1.86 per cent. Concentrate 7.40 per cent. Tailings .22 per cent.
As 22.83 tons of concentrate were obtained from 100 tons of ore treated, the efficiency of the extraction was almost 91%.
Ewample 2.
A sweet roasted flotation concentrate is washed several times with soft water by decantation or similar methods (the settlement of the slime being no difficulty on account of the fiocculated state existing owing to soluble salts remaining in small traces even after repeated washings). Soft water to the amount of about four or five times the weight of the concentrate is added and, with or without preliminary gravity concentration of the pulp so prepared to eliminate the coarsest particles of tin oxide, the sodium salt of dinitroso resorcinol to the amount of one-tenth of a pound or more per ton of concentrate is added and the pulp is stirred. Phenolic and wood tar frothers will then be found to function satisfactorily in raising the tin oxide into the'froths The following tin assays indicate the char acter of the results obtained:
Concentrate 9 per cent. Rough pannings together with flotation concentrate 27 per cent.
Tailingsoftreated concentrate 3.9 per cent.
The tailings contained no tin oxide slime nor free coarse tin oxide but only heavy middlings, needing recrushing, and as 22 tons of rough pannings and flotation concentrate were obtained from 100 tons of raw concentrate the efficiency of the recovery without recrushing of middlings was about 66 per cent.
Emamp Z6 3.
A vanadium mineral is treated as indicated in the above examples, cupferron being substituted for the sodium salt of phenyl glyoxime and phenolic and wood tar frothers. being employed to bring the vanadium minerals substantially into the froth.
Example 4.
Taurocholic acid as its sodium salt or the mixed amldo acids of animal gall are addedin a convenient proportion to a crushed to effect the desired separation owing to their affinity for calcium carbonate.
It is to be understood that no claim is made herein to the frothing agents, the employment of which is referred to, and it is further desired to point out that organic acids properly so called and picric acid have been proposed to be used in flotation processes.
In the appended claims the organic compounds used will be described as ampheteric, this expression being employed as including bodies displaying aci-pseudo forms and as used in the claims the expression resinous decomposition products includes tarry or resinous complexes or decomposition products.
Having now described my invention, what 1 claim as new and desire to secure by Letters Patent is 1. In the treatment of heterogenous materials containing the relatively more val.- uable metals as oxygen-containing compounds, for the purpose of separating the more valuable constituents from. the less valuable components thereof by methods involving flotation, the improvement Which comprises the addition to the material of organic compounds of the class hereinabove described, such compounds being amphoteric compounds contain nitrogen and oxygen and capable of acting chemically upon the constituent it is desired to separate, forming resinous decomposition products which facilitate separation of the metal-bearing constituent by flotation, and thereafter subjecting the so treated material to froth flotation.
2. The process for the separation of the more valuable constituents of ores, concentrates, metallurgical products and like heterogeneous materials as claimed in claim 1, in which the organic bodies adapted to form resinous decomposition products are formed in the presence of the heterogeneous material.
3. A form of execution of the process as covered in claim 1, in which air flotation is resorted to, the oxygen of the air acting to promote the formation of the resinous decomposition products.
In testimony whereof I have signed my name to this specification.
ARCHIBALD COMLEY VIVIAN.
Publications (1)
Publication Number | Publication Date |
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US1449797A true US1449797A (en) | 1923-03-27 |
Family
ID=3403854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US1449797D Expired - Lifetime US1449797A (en) | Archibald comley vivian |
Country Status (1)
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US (1) | US1449797A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4269702A (en) * | 1977-12-08 | 1981-05-26 | Imperial Chemical Industries Limited | Ore treatment process |
US4466886A (en) * | 1982-09-28 | 1984-08-21 | Vojislav Petrovich | Froth flotation method for recovering minerals |
-
0
- US US1449797D patent/US1449797A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4269702A (en) * | 1977-12-08 | 1981-05-26 | Imperial Chemical Industries Limited | Ore treatment process |
US4466886A (en) * | 1982-09-28 | 1984-08-21 | Vojislav Petrovich | Froth flotation method for recovering minerals |
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