US2289741A - Concentration of kyanite - Google Patents

Concentration of kyanite Download PDF

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Publication number
US2289741A
US2289741A US387668A US38766841A US2289741A US 2289741 A US2289741 A US 2289741A US 387668 A US387668 A US 387668A US 38766841 A US38766841 A US 38766841A US 2289741 A US2289741 A US 2289741A
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United States
Prior art keywords
kyanite
ore
alkali
pulp
froth flotation
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Expired - Lifetime
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US387668A
Inventor
Francis X Tartaron
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PHOSPHATE RECOVERY Corp
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PHOSPHATE RECOVERY CORP
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Priority to US387668A priority Critical patent/US2289741A/en
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Publication of US2289741A publication Critical patent/US2289741A/en
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D3/00—Halides of sodium, potassium or alkali metals in general
    • C01D3/04—Chlorides
    • C01D3/08—Preparation by working up natural or industrial salt mixtures or siliceous minerals
    • 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

Definitions

  • the present invention relates to an improved process of concentrating kyanite from its ores by froth flotation.
  • the present invention which may be considered an improvement upon the above-mentioned process, is the result of the discovery that by pre-treating the kyanite ore with caustic alkali and then washing out the caustic alkali, the kyanite may be successfully concentrated by froth flotation in a pulp containing a fatty acid, possibly with slight quantities of pine oil or other frother at the discretion of the operator.
  • Baker Mounticle size which was mostly minus 35-mesh, and was largely deslimed.
  • the comminution is preferably accomplished in stages so as to reduce the tain kyanite ore was comminuted to suitable parslimes to a minimum.
  • the comminuted ore was then agitated in a pulp at approximately solids with 2.00 lbs. per ton of ore of caustic soda for about three minutes. After thus being pretreated with alkali, the ore was washed substantially free of said alkali; and in a pulp at approximately 70% solids was conditioned with oleic acid (red oil) in the amount of 0.45 lbs.
  • oleic acid red oil
  • a process of concentrating kyanite from its ores which comprises comminuting the ore to suitable particle size and desliming the same, pretreating the comminuted ore by agitating it in a pulp containing caustic alkali, washing said alkali away from the ore, agitating the thus alkalitreated and washed ore in a pulp free from any depressing agent and containing oleic acid as the only flotation agent, and subjecting the thus conditioned pulp of kyanite ore to froth flotation to separate a concentrate of kyanite.

Description

Patent ed July 14, 1942 UNITED STATES PATENT OFFICE 2,289,741 CONCENTRATION or KYANITE No Drawing. Application April 9, 1941, Serial No. 387,668
1 Claim.
The present invention relates to an improved process of concentrating kyanite from its ores by froth flotation.
In a co-pending patent application, assigned to the same assignee as the present application, by Nathan K. Karchmer and Charles E. Heinrichs, Serial No. 349,128, filed- August 1, 1940, there is described a process of concentrating kyanite from its ores, which is characterized by a first step of conditioning an aqueous pulp of the kyanite ore in a conditioner by adding to and admixing concurrently with the pulp a higher fatty acid (such as oleic acid) and sodium silicate as cooperating agents, and the second step of subjecting this conditioned pulp in froth flotation cells to froth flotation, without the addition of further agents, to separate a concentrate of kya nite. The present invention, which may be considered an improvement upon the above-mentioned process, is the result of the discovery that by pre-treating the kyanite ore with caustic alkali and then washing out the caustic alkali, the kyanite may be successfully concentrated by froth flotation in a pulp containing a fatty acid, possibly with slight quantities of pine oil or other frother at the discretion of the operator.
It is unnecessary to theorize about what the pretreatment with alkali does to the particles of the kyanite ore, but the fact is that for some reason this alkali pretreatment and subsequent washing out of the alkali leaves the ore particles in such condition that the kyanite particles are much more amenable to froth flotation with a higher fatty acid than is the case with ores that have not been so treated. Sodium hydroxide (caustic soda) in the quantity hereinafter mentioned, has been found to be a satisfactory alkali for use in the Dre-treatment of the kyanite ore. Other caustic alkali, such as potassium hydroxide (caustic potash) may be used. Oleic acid, in the quantity hereinafter mentioned, has been found particularly useful as a higher fatty acid in the carrying out of the process, but any other fatty acid having at least twelve carbon atoms can be used.
In practicing the process and obtaining the ex-. cellent results hereinafter set forth, Baker Mounticle size, which was mostly minus 35-mesh, and was largely deslimed. The comminution is preferably accomplished in stages so as to reduce the tain kyanite ore was comminuted to suitable parslimes to a minimum. The comminuted ore was then agitated in a pulp at approximately solids with 2.00 lbs. per ton of ore of caustic soda for about three minutes. After thus being pretreated with alkali, the ore was washed substantially free of said alkali; and in a pulp at approximately 70% solids was conditioned with oleic acid (red oil) in the amount of 0.45 lbs. per ton of ore and with a frother consisting of pine oil (P. T. 101) in the amount of 0.14 lbs. per ton of ore. The mixing time was two minutes. The ore thus conditioned was subjected to froth flotation in a froth flotation machine with the following results:
From the above data, it will be noted that from ore containing 33.82% kyanite there was obtained a kyanite concentrate having a grade of 91.78% kyanite, with 90.1% recovery of the kyanite in the ore. It will also be noted that these excellent results were obtained by the use of only a small amount of fatty acid as the only flotation agent, and without any depressing agent.
What is claimed is:
A process of concentrating kyanite from its ores, which comprises comminuting the ore to suitable particle size and desliming the same, pretreating the comminuted ore by agitating it in a pulp containing caustic alkali, washing said alkali away from the ore, agitating the thus alkalitreated and washed ore in a pulp free from any depressing agent and containing oleic acid as the only flotation agent, and subjecting the thus conditioned pulp of kyanite ore to froth flotation to separate a concentrate of kyanite.
FRANCIS X. TARTARON.
US387668A 1941-04-09 1941-04-09 Concentration of kyanite Expired - Lifetime US2289741A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424552A (en) * 1945-05-01 1947-07-29 Clemmer Julius Bruce Froth flotation of nonmetallic minerals
US2483192A (en) * 1945-11-24 1949-09-27 American Cyanamid Co Froth flotation of iron impurities from feldspar
US4900431A (en) * 1987-12-24 1990-02-13 Denain-Anzin Mineraux Refractaire Ceramique S.A. Process for upgrading andalusite

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424552A (en) * 1945-05-01 1947-07-29 Clemmer Julius Bruce Froth flotation of nonmetallic minerals
US2483192A (en) * 1945-11-24 1949-09-27 American Cyanamid Co Froth flotation of iron impurities from feldspar
US4900431A (en) * 1987-12-24 1990-02-13 Denain-Anzin Mineraux Refractaire Ceramique S.A. Process for upgrading andalusite

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