US3893915A - Fluorspar ore flotation - Google Patents
Fluorspar ore flotation Download PDFInfo
- Publication number
- US3893915A US3893915A US369892A US36989273A US3893915A US 3893915 A US3893915 A US 3893915A US 369892 A US369892 A US 369892A US 36989273 A US36989273 A US 36989273A US 3893915 A US3893915 A US 3893915A
- Authority
- US
- United States
- Prior art keywords
- fluorite
- flotation
- pulp
- ton
- alkali metal
- 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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- 239000010436 fluorite Substances 0.000 title claims abstract description 37
- 238000005188 flotation Methods 0.000 title claims abstract description 26
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 31
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 14
- -1 alkali metal bisulfite salt Chemical class 0.000 claims abstract description 13
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 10
- 239000000194 fatty acid Substances 0.000 claims abstract description 10
- 229930195729 fatty acid Natural products 0.000 claims abstract description 10
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 9
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 8
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 7
- 238000009291 froth flotation Methods 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- 239000004115 Sodium Silicate Substances 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical group [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 3
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims 2
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 claims 1
- 238000011084 recovery Methods 0.000 description 10
- 229910021532 Calcite Inorganic materials 0.000 description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 5
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 4
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 4
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 4
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 4
- 239000005642 Oleic acid Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 4
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 4
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 4
- 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 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 235000017550 sodium carbonate Nutrition 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 235000017343 Quebracho blanco Nutrition 0.000 description 1
- 241000065615 Schinopsis balansae Species 0.000 description 1
- VSYMNDBTCKIDLT-UHFFFAOYSA-N [2-(carbamoyloxymethyl)-2-ethylbutyl] carbamate Chemical compound NC(=O)OCC(CC)(CC)COC(N)=O VSYMNDBTCKIDLT-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical class [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- GRWZHXKQBITJKP-UHFFFAOYSA-N dithionous acid Chemical class OS(=O)S(O)=O GRWZHXKQBITJKP-UHFFFAOYSA-N 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000012991 xanthate Substances 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
- B03D1/002—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
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/008—Organic compounds containing oxygen
-
- 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
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
-
- 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
- ABSTRACT Flotation of fluorite from calcareous gangue with a fatty acid collector in an aqueous alkaline ore pulp is improved by adding an alkali metal bisulfite salt or an alkali metal thiosulfate salt before adding the collector.
- reagents have been suggested for use to improve the selective flotation of fluorite from calcite.
- metalisalts which may be added to sodium silicate'to form gels, oxidants such as and gangue depressants such as quebracho.
- An object of the invention is to improve the efficiency with which fluorite can be floatedfrom calcere-- ous gangue with a fatty acid collector in an aqueous alkaline ore pulp. 2
- the essence of the present invention resides in adding a small amount of an alkali metal bisulfite salt, an
- alkali metal thiosulfate salt or mixtures thereof to an aqueous alkaline pulp of fluorspar ore before adding a fatty acid collector and subjecting the ore pulp to froth flotation to produce a fluorite-rich froth product and a tailings which is a concentrate of calcareous and sili- CCOUS gangue.
- the alkali metal bisulfite and thiosulfate salts used in the practice of my invention are capable of reacting with calcium ions to form highly soluble calcium salts. It is believed that the outstanding effectiveness of such salts in improving the selective flotation of fluorite from calcite is attributable to the selective solubilization of calcium from the fluorite mineral particles. This in turn results in improved collection by the fatty acid reagent. Initially, the beneficial effect of these salts on the selective flotation of fluorite from calcite wasattributable to the fact that the salts were functioning as reducing agents. However, it was found that a wide variety of other reducing agents, including a hydrosulfite salt, were not beneficial. Consequently, the initial theory was discarded.
- the fluorspar ore is ground to a size sufficiently small to liberate the fluorite, e.g., 100 mesh (Tyler) or finer.
- the pulp is then alkalized by adding soda ash or caustic soda.
- the pulp is dispersed with a mineral dispersant such as sodium silicate or a sodium silicate-polyvalent metal salt hydrosol of the type used in the flotation process described in U.S. Pat. No. 3,337,048.
- An alkali metal bisulfite or thiosulfate salt is generally used in amount in the range of about A to 2 lbs/ton.
- the salt is added before adding the fatty collector which may be, for example, oleic acid or tall oil.
- the fatty collector which may be, for example, oleic acid or tall oil.
- starva- A sample of the minus mesh ore was wet' ground 'to minus 325 mesh Tyler) -in a rod mill.
- the ore was tion amounts of collector reagent are used.
- Flotation is 1
- the following examples are given for illustrative pur- I poses.
- Afsulfide flotation was carried out after adjusting pH to 9.5 with soda ash and adding Z-6 (potassium "ainyl xanthate) in amount of 0.25,lb ./ton.
- Dowfroth 250 was used as the frother in amount of 0.20 lb./ton.
- a sulfide froth was removed for 5 m inutes'.' 'j
- port'ions of tlie tailings from the sulfide flotation were treated with sodium bisulfite (0.5 lb./ton) added as a 1 percent aqueous solution, followed by conditioning for 5 minutes, addition of oleic acid (0.36 lb./ton), followed by conditioning for 12 minutes.
- the conditioned pulp was subjected to froth flotation using a Denver Sub-A cell operating at 900 rpm.
- the rougher froth concentrate was cleaned 3 times by flotation.
- the procedure was repeated using 1 lb./ton sodium bisulfite.
- the froth products using 0.5 and 1.0 lb./ton bisulfite as activators were assayed and recoveries were obtained by weighing products. 7
- flotation index which is used in the table is a calculated value that is indicative of flotation efficiency.
- sodium bisulfite was added in amount of 0.5 lb./ton and it was incorporated into the pulp before adding oleic acid (0.36 lb./ton). It was found that the sodium bisulfite improved grade and increased flotation index at pH values of 8.5 and 10.5. However, recoveries and flotation indices were better when using sodium bisulfite at pH 9.5 (Example I) than they were when flotation was carried out with the same amount of sodium bisulfite at pH 8.5 or 10.5.
- Example Ill The procedure of Example I was repeated with another source of the ore pulp using 1 lb./ton sodium thiosulfate. The thiosulfate salt was added as a 1 percent solution. The results were similar to those obtained with l lb./ton sodium bisulflte.
- alkali metal thiosulfate is sodium thiosulfate used inamount within the range of A to 2 lbs/ton.
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
Flotation of fluorite from calcareous gangue with a fatty acid collector in an aqueous alkaline ore pulp is improved by adding an alkali metal bisulfite salt or an alkali metal thiosulfate salt before adding the collector.
Description
United States Patent [191 Mercade 1 July 8,1975
[ FLUORSPAR ORE FLOTATION [75] Inventor: Venancio V. Mercade, Metuchen,
[22] Filed: June 14, 1973 [21] Appl. No.: 369,892
[52] U.S. Cl. 209/166 [51] Int. Cl 303d 1/02 [58] Field of Search 209/166, 167
[56] I References Cited UNITED STATES PATENTS 1,254,173 l/l9l8 Terry 209/167 1,274,505 8/1918 Readford 209/167 2 ,263,552 11/1941 Anderson 209/166 2,401,651 9/1946 Clemmer 209/166 2,497,863 2/1950 Clemmer 209/166 3,430,765 3/1969 Allen 209/166 X OTHER PUBLICATIONS Chem. Abst. 65, 1966, 8397b.
Chem. Abst,, 69, 1968, 78829w.
Mack, Chern. Dictionary, Third Edition, 1944 pgs. 425 & 429.
Primary Examiner-Robert Halper Attorney, Agent, or Firm-Melvin C. Flint; Inez L. Moselle [57] ABSTRACT Flotation of fluorite from calcareous gangue with a fatty acid collector in an aqueous alkaline ore pulp is improved by adding an alkali metal bisulfite salt or an alkali metal thiosulfate salt before adding the collector.
5 Claims, No Drawings dichromate salts 1 FLUORSPAR ORE FLOTATION' BACKGROUND oF THE iNvENTioN Fluorite (CaF- frequently occurs in fluorspar ores containing appreciable quantities of calcareous gangue. especially calcite. Fluorite can be floated from the calcite and silica-and silicate gangueminerals with a fatty acid collector. Preferably silicate dispersant is employed. However, fluorite and calcite' have similar surface properties .and the grades and/.or recoveries of the fluorite concentrateszgenerally leavesomething to be desired when the ores are rich in calcite.
Various reagents have been suggested for use to improve the selective flotation of fluorite from calcite. Among these reagents are metalisalts, which may be added to sodium silicate'to form gels, oxidants such as and gangue depressants such as quebracho. I
An object of the invention is to improve the efficiency with which fluorite can be floatedfrom calcere-- ous gangue with a fatty acid collector in an aqueous alkaline ore pulp. 2
The essence of the present invention resides in adding a small amount of an alkali metal bisulfite salt, an
alkali metal thiosulfate salt or mixtures thereof, to an aqueous alkaline pulp of fluorspar ore before adding a fatty acid collector and subjecting the ore pulp to froth flotation to produce a fluorite-rich froth product and a tailings which is a concentrate of calcareous and sili- CCOUS gangue.
The alkali metal bisulfite and thiosulfate salts used in the practice of my invention are capable of reacting with calcium ions to form highly soluble calcium salts. It is believed that the outstanding effectiveness of such salts in improving the selective flotation of fluorite from calcite is attributable to the selective solubilization of calcium from the fluorite mineral particles. This in turn results in improved collection by the fatty acid reagent. Initially, the beneficial effect of these salts on the selective flotation of fluorite from calcite wasattributable to the fact that the salts were functioning as reducing agents. However, it was found that a wide variety of other reducing agents, including a hydrosulfite salt, were not beneficial. Consequently, the initial theory was discarded.
DESCRIPTION OF THE INVENTION In putting the invention into practice, the fluorspar ore is ground to a size sufficiently small to liberate the fluorite, e.g., 100 mesh (Tyler) or finer. The pulp is then alkalized by adding soda ash or caustic soda. Preferably, the pulp is dispersed with a mineral dispersant such as sodium silicate or a sodium silicate-polyvalent metal salt hydrosol of the type used in the flotation process described in U.S. Pat. No. 3,337,048. An alkali metal bisulfite or thiosulfate salt is generally used in amount in the range of about A to 2 lbs/ton. The salt is added before adding the fatty collector which may be, for example, oleic acid or tall oil. Preferably, starva- A sample of the minus mesh ore was wet' ground 'to minus 325 mesh Tyler) -in a rod mill. The ore was tion amounts of collector reagent are used. Flotation is 1 The following examples are given for illustrative pur- I poses.
pulped in water at about 25 percent solids.-The pulp 'was alkalized by adding soda ash, 10lbs./ton andthen it was dispersed by incorporating a hydrosol obtained by' mixin'g a 1- percent solution of ZnSO.;.'7l-I O with a "solution of 0 sodium silicate diluted to 5 percent and containir'igthe equivalent of 15'lbs./t on O and 1.9 lbs/ton ZnSO .7I-I O.' 4
Afsulfide flotation was carried out after adjusting pH to 9.5 with soda ash and adding Z-6 (potassium "ainyl xanthate) in amount of 0.25,lb ./ton. Dowfroth 250 was used as the frother in amount of 0.20 lb./ton. After conditioning the pulp for 5 minutes, a sulfide froth was removed for 5 m inutes'.' 'j
In one test carried out in accordance with this invention, port'ions of tlie tailings from the sulfide flotation were treated with sodium bisulfite (0.5 lb./ton) added as a 1 percent aqueous solution, followed by conditioning for 5 minutes, addition of oleic acid (0.36 lb./ton), followed by conditioning for 12 minutes. The conditioned pulp was subjected to froth flotation using a Denver Sub-A cell operating at 900 rpm. The rougher froth concentrate was cleaned 3 times by flotation. The procedure was repeated using 1 lb./ton sodium bisulfite. The froth products using 0.5 and 1.0 lb./ton bisulfite as activators were assayed and recoveries were obtained by weighing products. 7
A control test was carried out with another portion of the tailings from the preliminary sulfide flotation.
Results are summarized in table form.
The term flotation index which is used in the table is a calculated value that is indicative of flotation efficiency.
The following equation is used to compute flotation index.
Fl 4 d grade X Recovery (actual) otauon m ex grade X Recovery (perfect separation) The grade of a perfect separation would be 100 percent and recovery would be 100 percent.
ACTIVATION OF FLUORITE WITH SODIUM BISULFITE- OLEIC ACID COLLECTOR. pH 9.5
based on head assay of 23.2 percent CaCF,
Data in the table show that the flotation index was improved by adding 0.5 and 1 lb./ton sodium bisulfite to the pulp before conditioning the pulp with oleic acid and floating fluorite. The higher index was attributed to both higher grade and higher recovery when using 1 lb./ton NaHSO When using 05 lb./ton NaHSO; the higher index value was due to the higher recovery.
EXAMPLE ll The experimental and control tests of Example [were repeated with the exception that fluorite was floated at pH 8.5. In other tests, fluorite was floated at pH 10.5. In tests carried out in accordance with the invention,
- sodium bisulfite was added in amount of 0.5 lb./ton and it was incorporated into the pulp before adding oleic acid (0.36 lb./ton). It was found that the sodium bisulfite improved grade and increased flotation index at pH values of 8.5 and 10.5. However, recoveries and flotation indices were better when using sodium bisulfite at pH 9.5 (Example I) than they were when flotation was carried out with the same amount of sodium bisulfite at pH 8.5 or 10.5.
EXAMPLE Ill The procedure of Example I was repeated with another source of the ore pulp using 1 lb./ton sodium thiosulfate. The thiosulfate salt was added as a 1 percent solution. The results were similar to those obtained with l lb./ton sodium bisulflte.
I claim:
1; In the froth flotation of fluorite from a calcareous gangue with a fatty acid collector for the fluorite in an aqueous alkaline ore pulp, the improvement which consists in activating said pulp for the selective flotation of fluorite by adding a material selected from the group consisting of alkali metal bisulfite, alkali metal thiosulfate and mixtures thereof.
2. The process of claim 1 wherein said alkali metal thiosulfate is sodium thiosulfate used inamount within the range of A to 2 lbs/ton.
3. The process of claim 2 wherein the fluorite is floated at a pH of about 9.5.
4. The process of claim 2 wherein said alkaline ore pulp is dispersed with sodium silicate.
5. ln the froth flotation of fluorite from a calcareous gangue with a fatty acid collector for the fluorite in an aqueous alkaline ore pulp, the improvement which comprises activating said pulp for the selective flotation of fluorite by adding sodium bisulflte in amount within the range of A to 2 lbs/ton.
UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION PATENT NO. DATED July 8, 1975 INVENTOR(S) i Venancio V. Mercade it is certified that error appears in the ab0veidentified patent and that said Letters Patent are hereby corrected as shown below:
Column 2 line 46 the equation should read:
grade X recovery (actual) Flotation index 100 X grade X recovery (perfect separation) Signed and Sealed this sixteenth Day Of September 1975 [SEAL] Arrest:
RUTH C. MASON C. MARSHALL DANN Allcsling Officer Commissioner nj'PaIenrs and Trademarks
Claims (5)
1. IN THE FROTH FLOTATION OF FLUORITE FROM A CALCAREOUS GANGUE WITH A FATTY ACID COLLECTOR FOR THE FLUORITE IN AN AQUEOUS ALKALINE ORE PULP, THE IMPROVEMENT WHICH CONSISTS IN ACTIVATING SAID PULP FOR THE SELECTIVE FLOTATION OF FLUORITE BY ADDING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL BISULFITE, ALKALI METAL THIOSULFATE AND MIXTURES THEREOF.
2. The process of claim 1 wherein said alkali metal thiosulfate is sodium thiosulfate used in amount within the range of 1/4 to 2 lbs./ton.
3. The process of claim 2 wherein the fluorite is floated at a pH of about 9.5.
4. The process of claim 2 wherein said alkaline ore pulp is dispersed with sodium silicate.
5. In the froth flotation of fluorite from a calcareous gangue with a fatty acid collector for the fluorite in an aqueous alkaline ore pulp, the improvement which comprises activating said pulp for the selective flotation of fluorite by adding sodium bisulfite in amount within the range of 1/4 to 2 lbs./ton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US369892A US3893915A (en) | 1973-06-14 | 1973-06-14 | Fluorspar ore flotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US369892A US3893915A (en) | 1973-06-14 | 1973-06-14 | Fluorspar ore flotation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3893915A true US3893915A (en) | 1975-07-08 |
Family
ID=23457355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US369892A Expired - Lifetime US3893915A (en) | 1973-06-14 | 1973-06-14 | Fluorspar ore flotation |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3893915A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5061461A (en) * | 1989-05-04 | 1991-10-29 | Engelhard Corporation | Cationic processing of kaolin ores |
| US5112782A (en) * | 1989-05-04 | 1992-05-12 | Engelhard Corporation | Cationically processed calcined kaolin clay |
| US5717140A (en) * | 1995-05-30 | 1998-02-10 | Alliedsignal, Inc. | Angular rate sensor electronic balance |
| US5866816A (en) * | 1995-05-30 | 1999-02-02 | Alliedsignal Inc. | Angular rate sensor misalignment correction |
| US6041941A (en) * | 1997-06-26 | 2000-03-28 | Boc Gases Australia Limited | Reagent consumption in mineral separation circuits |
| US20110155651A1 (en) * | 2009-12-04 | 2011-06-30 | Barrick Gold Corporation | Separation of copper minerals from pyrite using air-metabisulfite treatment |
| CN102764700A (en) * | 2012-08-01 | 2012-11-07 | 中钢集团马鞍山矿山研究院有限公司 | Preparation method of low temperature resisting fluorite flotation collector |
| WO2014110518A1 (en) * | 2013-01-14 | 2014-07-17 | Simmons William D | Flotation circuit for oxide and sulfide ores |
| CN106179763A (en) * | 2016-06-27 | 2016-12-07 | 洛阳丰瑞氟业有限公司 | Fluorite flotation calcium carbonate inhibitor and preparation method thereof |
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| US1254173A (en) * | 1917-03-24 | 1918-01-22 | Joseph T Terry Jr | Process for the concentration of ore. |
| US2263552A (en) * | 1940-02-21 | 1941-11-25 | Mahoning Mining Company | Method of concentrating fluorspar ores |
| US2401651A (en) * | 1942-12-28 | 1946-06-04 | John A Mathis | Apparatus for evaporating liquid oxygen |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5061461A (en) * | 1989-05-04 | 1991-10-29 | Engelhard Corporation | Cationic processing of kaolin ores |
| US5112782A (en) * | 1989-05-04 | 1992-05-12 | Engelhard Corporation | Cationically processed calcined kaolin clay |
| US5717140A (en) * | 1995-05-30 | 1998-02-10 | Alliedsignal, Inc. | Angular rate sensor electronic balance |
| US5866816A (en) * | 1995-05-30 | 1999-02-02 | Alliedsignal Inc. | Angular rate sensor misalignment correction |
| US6041941A (en) * | 1997-06-26 | 2000-03-28 | Boc Gases Australia Limited | Reagent consumption in mineral separation circuits |
| US20110155651A1 (en) * | 2009-12-04 | 2011-06-30 | Barrick Gold Corporation | Separation of copper minerals from pyrite using air-metabisulfite treatment |
| US9346062B2 (en) | 2009-12-04 | 2016-05-24 | 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 |
| CN102764700A (en) * | 2012-08-01 | 2012-11-07 | 中钢集团马鞍山矿山研究院有限公司 | Preparation method of low temperature resisting fluorite flotation collector |
| WO2014110518A1 (en) * | 2013-01-14 | 2014-07-17 | Simmons William D | Flotation circuit for oxide and sulfide ores |
| US8931642B2 (en) | 2013-01-14 | 2015-01-13 | William D. Simmons | Activated flotation circuit for processing combined oxide and sulfide ores |
| CN106179763A (en) * | 2016-06-27 | 2016-12-07 | 洛阳丰瑞氟业有限公司 | Fluorite flotation calcium carbonate inhibitor and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: ENGLEHARD CORPORATION A CORP. OF DE., NEW JERSE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PHIBRO CORPORATION;REEL/FRAME:003981/0436 Effective date: 19810518 |
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| AS | Assignment |
Owner name: PHIBRO CORPORATION Free format text: CHANGE OF NAME;ASSIGNOR:ENGELHARD MINERALS & CHEMICALS CORPORATION;REEL/FRAME:004140/0512 Effective date: 19830328 |