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Froth-flotation-of-calcium-borate-minerals

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Froth flotation of calcium borate minerals

Details

Inventors: Barwise, Christopher H.;
Assignee: Fospur Limited (Derby, GB2)
Primary Examiner: Silverman; Stanley S.
Assistant Examiner: Lithgow; Thomas M.
Attorney, Agent or Firm: Nixon & VanDerhye

Particles of a calcium borate mineral, such as colemanite or ulexite, are recovered from an ore by a froth flotation process using a dialkyl sulphosuccinate as collector. Suitable dialkyl sulphosuccinates include sodium or ammonium dinonyl sulphosuccinate, sodium or ammonium di-isodecyl sulphosuccinate, and sodium or ammonium dilauryl sulphosuccinate. The dialkyl sulphosuccinates may be used as aqueous solutions or as solutions in solvents consisting of water and methylated spirit, a dihydric alcohol such as ethylene glycol or hexylene glycol or a monohydric alcohol containing more than 5 carbons.

DETAILED DESCRIPTION I claim: 1.
A collector composition for use in the recovery of a calcium borate mineral from an ore by froth flotation of an aqueous slurry of particles of the ore, said composition comprising 50-80% by weight of a dialkylsulphosuccinate, 2-30% by weight of water and 10-40% by weight of a dihydric alcohol or a monohydric alcohol containing more than 5 carbon atoms.
2.
A collector composition according to claim 1 wherein the dialkyl sulphosuccinate contains 6 to 18 carbon atoms in each alkyl group.
3.
A collector composition according to claim 2 wherein the dialkyl sulphosuccinate contains 8 to 14 carbon atoms in each alkyl group.
4.
A collector composition according to claim 3 wherein the dialkyl sulphosuccinate is sodium dinonyl sulphosuccinate, ammonium dinonyl sulphosuccinate, sodium di-isodecyl sulphosuccinate, ammonium diisodecyl sulphosuccinate, sodium dilauryl sulphosuccinate or ammonium dilauryl sulphosuccinate.
5.
A collector composition according to claim 1 wherein the dihydric alcohol is ethylene glycol or hexylene glycol.
6.
A collector composition according to claim 1 in which the dialkyl sulphosuccinate is a mixture of sodium di-isodecyl sulphosuccinate and ammonium dinonyl sulphosuccinate.

Description:
This invention relates to the froth flotation of calcium borate minerals, particularly colemanite and ulexite minerals.
Froth flotation is a commonly used process of separating desired mineral particles from unwanted mineral particles such as silica, silicates and other similar materials, or of separating particles of one desired mineral from those of another desired mineral.
A surface active chemical compound, known as a "collector", is added to an aqueous suspension of the ore particles so as to render the particles of a desired mineral hydrophobic and capable of being separated from particles of another desired mineral or of undesired minerals.
A so-called "frother" is added to the suspension and the suspension is then aerated.
The air bubbles adhere selectively to the particles of the desired mineral, the particles float to the surface to form a froth which overflows into a launder, and the desired mineral is thus separated

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