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
• • 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
  • B03D1/00—Flotation
  • B03D1/001—Flotation agents
  • B03D1/004—Organic compounds
  • B03D1/016—Macromolecular 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
  • B03D2201/007—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
  • B03D2201/06—Depressants
• • 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

• the present invention relates to a process for the flotation of CaF more particularly, to an improved process for separating, by flotation, the calcium fluoride from the crude ore, wherein it is in admixture with gangues and clays.
• the desliming operation involves losses in the useful component that one wishes to beneficiate. These losses increase with intensified grinding and with decreased hardness of the valuable component.
• the sludge presented a particularly difficult problem because no specific reactant was known that would neutralize the sludges without appreciably reducing the flotability of the CaF
• the fluorite is a rather soft mineral and since it is necessary to employ rather intensive grinding in order to free the granules, there occurs an accumulation of CaF in the finest fractions which are removed with the sludges.
• the losses of CaF due to the desliming sometimes amount to percent by weight of the CaF contained in the raw material.
• This invention provides means for recovering the fluorite contained in the muddy material or slime in the collection basins as well as for obtaining from such slime or from normal crude ore a CaF- product of an acid degree (that is, with a CaF titre higher than 95 percent and with a useful Cal titre higher than 91 percent; the useful CaF being defined as the total CaF less 4 times the weight percent of SiO More particularly, we have found new reactants which, used together with those previously employed for the flotation of fluorite, provide a simple and inexpensive solution to the problem.
• an ethoxylated alkyl phenol and an ethoxylated fatty acid are employed to condition the ore prior to flotation.
• the ethoxylated alkyl phenols depress the sludges without interfering with the flotability of the fluorite whereas, on the contrary, the previously known common depressors of the sludges also decrease the flotability of the fluorite.
• the ethoxylated fatty acids act as strong activators of the fluorite flotability, particularly the fine fluorite which is accompanied by very fine gangue.
• alkyl phenylpolyethylene glycols are generally obtained by reaction of an alkyl phenol with ethylene oxide. They have, as a substituent on the phenyl radical, an alkyl having from nine to l5 carbon atoms, and contain from l0 to 16 glycolic groups, CH CH O.
• Nonionic surfactants are produced industrially in great quantities and are easily found on the market.
• These commercially available products include, for instance the Tergitols of Union Carbide Corp., such as: Tergitol l2-P-9, Tergitol l2-P-l0, Tergitol l2-P-l2 dodecylphenyl-polyethylene glycol ethers); the Igepal CA and Igepal C0 of General Aniline & Film Corp; the Sapogens A of Anorgana Gendorf; the Hostapals C of Farbwerke Hoechst; the Carboxanes of Testilana Corp.; and the Tritons X of Rohm & Haas.
• the ethoxylated fatty acids also called polyoxyethylated fatty acids or, better still, polyethyleneoxy esters of the fatty acids, are obtained by reacting the fatty acid with ethylene oxide or with a polyethylene glycol.
• the polyethyleneoxy esters used in the process of the present invention are formed from a fatty acid having from 12 to 20 carbon atoms and from l0 to 20 -CH CH O(oxy ethylene) groups, They are, for instance, described in Sisley (loc. cit.) wherein they are classified in class III/B and are called polyethoxy esters of fatty acids; in Schwartz (loc. cit. on page I30); and in Mc- Cutcheons (loc. cit.).
• anionic surfactants are also produced on an industrial scale in large quantities and are easily found on the market.
• Emulphors of Sinnova Sadic Company of BASF and of General Aniline & Film Corp. (obtained from oleic acid, castor oil, talloil and ethylene oxide; the Emulsenes of Sapchim-Fournier-Cimig; the Ethofats of the Armour lndustrial Chem. Co.; and the Lipals E and S of Drew Chemical Corp.
• the preparation or conditioning of the mineral may be carried out in accordance with the present invention in the following way:
• the muddy material is pulped in water to form a slurry having a solids content of IS to 30 percent by weight.
• the slurry thus obtained is conditioned for l-l0 minutes, preferably from 2 to 4 minutes, with polyethyleneoxy alkyl phenol (I00 -200 g./t. [grams per metric ton] of dry solid) and then for an additional 1 to 10 minutes, preferably from 3 to 5 minutes, with the polyethyleneoxy ester (200-300 g./t. of dry solid).
• the slurry thus prepared is ready for being conveyed to flotation, which latter operation is carried out with the known reactants and with the usual technique.
• the following reactants are then added to the already conditioned slurry.
• An unsaturated fatty acid, such as oleic acid, as collector for the CaF (it forms a water-repellent coating on the fluorite granules); from 250 to 500 g./t, of solids are used, according to the fluorite contents of the slurry.
• a starch e.g. corn starch
• depressor of the silica in quantities offrom 500 to I500 g./t. of solids
• Sodium fluoride as activator of the fluorite in quantities of from 300 to 800 g./t. of solids (the sodium fluorite may be totally or partially replaced by the polyethyleneoxy ester).
• a tannin such as quebrache, for depressing the calcite in the successive flotation runs of the concentrate, in quantities offrom to 200 g./t. of solids.
• the reactants are added under stirring, in short time intervals from each other in accordance with common prior art flotation procedures.
• the polyethyleneoxy ester an activator for the fluorite, may be added together with the flotation reachad a mineral/water weight ratio of l:2.5.
• the consumption of reactants is expressed in grams/ton (metric) of dry solid.
• Conditioning 350 140 2,000 800 5 Conditioning 400 6 Roughing flotation... 100 10 1st re-run 28 170 7 28 200 170 5 28 200 170 100 5 28 200 170 5 No'rE,-The Aclntoi FAl of Arizona Chemical Co, is an emulsified mixture of unsaturated fatty acids obtained from talloil,
• N ore-M003 denotes carbonates and hydroxides
• the surfactant Aionico D, 560 is a Montecatini Edison S.p.A. product; it is a dodecylphenol having 12 groups of ethylene oxide.
• the surfactant Aionico T. 510 is a Montecatini Edison S.p.A. product; it is a condensation product of Tall oil with 17 molecules of ethylene oxide.
• Diapon T is produced by Montecatini Edison S.p.A.; it is the sodium salt of N- methyl-N-oleyl-taurine.
• a flotation process for the recovery of fluorite from clay-containing ores.
• the improvement which comprises, prior to carrying out conventional flotation. conditioning a flotation slurry by treating said slurry for a period of from about i to 10 minutes with from about 100 to 200 grams per metric ton of slurry solids of a polyethyleneoxy alkylphenol, and thereafter treating said slurry for a period of from about 1 to 10 minutes with from about 200 to 300 grams per metric ton of slurry solids of a polyethyleneoxy ester of a fatty acid.
• said polyethyleneoxy alkylphenol being made up of (I) an a] kylphenol radical in which the alkyl has from about 9 to [5 carbon atoms and (2) from about 10 to 16 ethyleneoxy units, and said polyethyieneoxy ester being made up of l) a fatty acid having from about 12 to 20 carbon atoms. and (21 from about 10 to 20 ethyleneoxy units and floating a fluorite 2.
• said treatment with said polyethyleneoxy alkylphenol is carried out for from about 2 to 4 minutes.
• polyethyleneoxy alkylphenol is made up of a dodecylphenol and 12 ethyleneoxy units.
• said flotation slurry comprises an aqueous suspension of a raw material ore.

Landscapes

• Separation Of Suspended Particles By Flocculating Agents (AREA)
• Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
• Paper (AREA)
• Detergent Compositions (AREA)
• Disintegrating Or Milling (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=11134974

Family Applications (1)

Country Status (7)

Cited By (7)

Families Citing this family (2)

Citations (7)

• 1969
  • 1969-12-31 FR FR6945613A patent/FR2027979A1/fr not_active Withdrawn
• 1970
  • 1970-01-08 DE DE19702000600 patent/DE2000600A1/de active Pending
  • 1970-01-08 GB GB917/70A patent/GB1220556A/en not_active Expired
  • 1970-01-08 SU SU1392721A patent/SU464090A3/ru active
  • 1970-01-08 ES ES375251A patent/ES375251A1/es not_active Expired
  • 1970-01-09 US US1851A patent/US3623605A/en not_active Expired - Lifetime
  • 1970-01-09 JP JP45002847A patent/JPS4910882B1/ja active Pending

Patent Citations (7)

Non-Patent Citations (1)

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