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
  • B03D1/012—Organic compounds containing sulfur
• • 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
  • 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
  • B03D2203/04—Non-sulfide ores

Definitions

• the present invention relates to a process for the flotation of feldspars contained in feldspathic ores by ric acid for hydrofluoric acid as the activating agent and effecting the flotation using a combination of a higher aliphatic amine and a higher aliphatic or arousing a combination of a higher aliphatic amine salt and Y a higher aliphatic or aromatic sulfonate as the flotation reagents so that activation with hydrofluoric acid is unnecessary.
• feldspars In conventional froth flotation, feldspars have been separated from the feldspathic ores in-which they occur generally by pulverizing an me into a proper particle range, classifying the particles according to size, subjecting them to an activation treatment with hydrofluoric acid, admixing them in water together with a collector (for example, an aliphatic amine) and a foaming agent (for example, pine oil), introducing air therein to cause bubbling, and recovering the feldspars in the froth or foam thus generated, leaving other constituents, such as quartz, as tailings.
• a collector for example, an aliphatic amine
• a foaming agent for example, pine oil
• hydrofluoric acid is a highly poisonous reagent and, therefore, must be handled with the greatest possible care.
• hydrofluoric acid has the disadvantage of attacking and dissolving the surface of the quartz with a reduction in the yield of the product. Complications are therefore presented in carrying out this process on a commercial scale.
• an object of the present invention is to provide an improved process for the flotation, espe cially froth flotation, of feldspars from feldspathic ores.
• Another object of the invention is to provide a process for the flotation of feldspar which does not require activation with hydrofluoric acid.
• Still another object of the invention is to provide a novel flotation process for separating feldspars from feldspathic ores wherein a combination of a higher aliphatic amine salt and a higher aliphatic or aromatic sulfonate is used as the flotation reagent under an acidic condition provided by sulfuric acid.
• the higher aliphatic amine salt used as one component of the flotation reagent in the present invention may be any higheraliphatic amine salt known to have utility as the so-called collector in conventional flotation processes.
• These salts are cationic surfactants containing at least one amino group and having attached to the nitrogen atomsof one amino group thereof a long chain hydrocarbon group, saturated, unsaturated and mixtures thereof, containing at least about eight carbon atoms and preferably at least about l2 carbons.
• the maximum number of carbon atoms in this chain is not particularly critical and may be selected in accordance with the usual practical limits in the art, say up to about 22-24 carbon atoms, for most purposes.
• the other substituents onthis nitrogen atom may be hydrogen atoms or short chain hydrocarbon groups with up tozabout five carbon atoms and preferably one or two carbon atoms. Quaternary ammonium derivatives of such'salts may also be useful.
• Suitable amine salts include salts of amines, for example, higher alkylamines such as primary amines such as mixed amines, for example, coconut oil amines, beef tallow amines and soybean oil amines; secondary amines such as N- dodecylpropylenediamine, N- pentadecylethylenediamine, N-decylhexamethylenediamineand beef tallow propylenediamine; and tertiary amines such as condensate of stearic acid with N-oleyl-N', N'-diethylethylenediamine or triethanolamine and N-acylates of alkylenetriamines, with inorganic acids suchas hydrochloric acid and phosphoric acid or with organic acids such as acetic acid, propionic acid, tertaric acid and succinic acid.
• higher alkylamines such as primary amines such as mixed amines, for example, coconut oil amines, beef
• a higher aliphatic or aromatic sulfonate serves as the I other constituent of the flotation reagent in the present invention.
• These surfactants often referred to as the alkane sulfonates, have a long chain hydrocarbon group, either saturated, unsaturated or mixtures thereof, connected to a sulfonate radical.
• the hydrocarbon group should contain at least about eight carbon atoms, and preferably at least about l2, up to the usual limits of the art, with an average of about 22-24 carbons being the normal upper limit as a practical matter, although longer chain compounds would not be excluded where available.
• Compounds of this type having intermediate linkages, such as ester, amide, or either groups, between the long chain group and the sulfonate radical can also be employed.
• higher aliphatic or aromatic sulfonates or alkane sulfonates are used in the form of their salts of an alkali metal, preferably sodium, but also potassium, lithium and the like.
• Sulfonates obtained by sulfonation of higher aliphatic or aromatic hydrocarbons such as higher paraffinic and higher olefinic hydrocarbons are preferred, particularly sodium salts of petroleum sulfonic acids obtained by treatment of petroleum with concentrated sulfuric acid.
• the proportion of the higher aliphatic amine'salt to the higher aliphatic or aromatic sulfonate is in'the range of 5:95-60:40 by weight.
• flotation reagents are used in the form of a -50 wt. percent solution in water.
• the flotation reagent resort to hydrofluoric acid as an activating agent is not required.,1t is sufficient to adjust the pH of the flotation medium to the desired acidity according to the practice of the art by means of sulfuric acid.
• the acidity will be usually a pH of, at least, about 4.5 and preferably 3.5-2.
• a raw ore is finely divided and then a fraction having a particle size less than about 1 mm is collected and cent of A1 0, and 0.142 percent of Fe O is divided finely and a fraction of a size below 1 190p. is collected and washed with water.
• 23 parts of l percent aqueous beef tallow amine acetate (Diomin T) so-' lution are mixed with 77 parts of 1 percent aqueous sodium petroleum sulfonate (Aeropromotor No. 825, a
• a flotator is adjusted to pH 2-3.5 with sulfuric acid.
• Pulp concentration is about 20-30 wt. percent.
• An impeller is rotated to effect sufficient foaming and the resulting froth is separated from the tailings.
• feldspar and quartz i.e., siliceous sand, are obtained as froth and tailings, respectively.
• the amount of the flotation reagent should be selected depending upon desired-quality of the recovered feldspar and the separation efficiency.
• the aggregate amount of the flotation reagents used here, on a dry basis, should not exceed about O.l50.2 percent by weight of ore and smaller quantities in the order of 0.05-0.10 may be preferable in accordance with the usual practice of the art regarding weights of foaming agent and collector together.
• a froth flotation process for separating feldspar from quartz-feldspar sands ore consisting essentially of the steps of subdividing said ore to produce at least a fraction having a particle size less than about 1 mm, collecting said fraction and washing the same with water to effect desliming, introducing the washed fraction at a solid concentration of about 20-30 wt percent into an aqueous flotation medium acidified to a pH of about 23.5 with sulfuric acid in the absence of hydrofluoric acid, said flotation medium containing about 0.05-0.2 percent by weight of a froth-flotation reagent consisting essentially of l) a salt with an inorganic or organic acid of an organic mono-, dior triamine having attached an amino nitrogen atom a long chain aliphatic hydrocarbon group containing, at least about eight carbon atoms and (2) a higher aromatic or aliphatic sulfonate of an alkali metal in a proportion in the range of 5:95-60:40 by weight,
• each of said amine salt and said sulfonate include a saturated or unsaturated long chain hydrocarbon radical having at least about eight carbon atoms.
• said flotation reagent is a' mixture of a beef tallow amine acetate and a aromatic sulfonate.

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• Manufacture And Refinement Of Metals (AREA)

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Family Applications (1)

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Cited By (8)

Citations (6)

• 1971
  • 1971-03-10 JP JP46013301A patent/JPS5220923B1/ja active Pending
• 1972
  • 1972-03-06 AU AU39668/72A patent/AU467898B2/en not_active Expired
  • 1972-03-06 US US00232280A patent/US3844939A/en not_active Expired - Lifetime

Patent Citations (6)

Non-Patent Citations (2)

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