The present invention relates to a method for the flotation of silicates from ores in the presence of a collecting agent and an effective amount of a froth modifier/collecting booster comprising at least one of the compounds of general formula I or mixtures thereof: ##STR00001##
wherein X is C1-C3 alkyl; R is straight or branched hydrocarbyl group containing 8 to 22 carbon atoms; n is integer from 2-4; m can vary from 0 to 2 and R is X or (CH2).sub.n-N(X).sub.2, with the proviso that when R is (CH2).sub.n-N(X).sub.2, then m is 1.

The present invention relates to a method for the flotation of silicates from ores in the presence of a collecting agent and an effective amount of a froth modifier/collecting booster comprising at least one of the compounds of general formula I or mixtures thereof:

##STR00001##

wherein X is C1-C3 alkyl; R is straight or branched hydrocarbyl group containing 8 to 22 carbon atoms; n is integer from 2-4; m can vary from 0 to 2 and R is X or (CH2).sub.nN(X).sub.2, with the proviso that when R is (CH2).sub.nN(X).sub.2, then m is 1.

Cationic reverse flotation methods, systems, and processes for producing a marketable iron oxide concentrate from an iron oxide mineral slurry (treatment slurry), wherein the iron oxide content of the concentrate is greater than the iron oxide content of the treatment slurry, include introducing the treatment slurry into a flotation cell, together with a collector, a frother and optionally an iron oxide depressant, and recovering two flow streams from the flotation cell, namely a froth fraction (also referred to as a flotation tail fraction) and a sink material fraction (also referred to as the flotation concentrate), wherein the treatment slurry in the flotation cell is maintained at a Natural pH.

The present invention is directed to a method for selectively recovering a mineral from an ore applying a promoter being a substituted ethylene diamine. Further, the present invention is directed to the use of said substituted polymeric alkylenediamine to separate a target mineral from an ore.

Disclosed herein are methods and systems for recovery of ancylite, a rare earth mineral comprising strontium carbonate, from rare earth ore. In many embodiments, the disclosed methods and systems provide for recovery of greater than 50% of the ancylite from an ancylite containing ore. In many embodiments, the ore is subjected to flotation in the presence of an acid, for example a hydroxamic acid, such as octanohydroxamic acid. The ore may also be subjected to magnetic separation, for example wet high intensity magnetic separation.

The present invention relates to a method for the flotation of silicates from ores in the presence of a collecting agent and an effective amount of a froth modifier/collecting booster comprising at least one of the compounds of general formula (I) or mixtures thereof: wherein X is C1-C3 alkyl; R is straight or branched hydrocarbyl group containing 8 to 22 carbon atoms; n is integer from 2-4; m can vary from 0 to 2 and R is X or (CH2).sub.n-N(X).sub.2, with the proviso that when R is (CH2).sub.n-N(X).sub.2, then m is 1. ##STR00001##

Processing of mineral material containing precious metal with one or more sulfide minerals and non-sulfide gangue minerals including acid-consuming carbonate may include preparation of a sulfide concentrate by flotation with the flotation or conditioning prior to flotation using a gas comprising carbon dioxide. Flotation may be at an acidic pH without prior decomposition of the acid-consuming carbonate and may be without addition of acid for pH adjustment.

A process for separating iron-bearing impurities from silica sand is described. The process comprises the steps of subjecting a silica sand slurry to froth flotation in the presence of a collector, frother and depressant selected to concentrate the iron-bearing impurities of the silica sand in a flotation froth, thereby producing a silica sand depleted in iron-bearing impurities in a tail product. The collector comprises 60 to 70 w/w % tall oil acids, 10 to 30 w/w % poly--hydroxyl alkyl ethers and up to 3 w/w % tall oil rosin. The frother comprises a non-ionic surfactant, in particular one or more alkyl polypropoxy C.sub.nP.sub.m and/or polyethoxy C.sub.nE.sub.m frothers, wherein n=0-6 and m=1-3. The depressant comprises sodium silicate.

An enhanced flotation method of lepidolite ore based on high-entropy collection is provided for mineral processing. Concerning problems of conventional lepidolite collectors, such as low collection ability, poor selectivity, and large consumption, based on thermodynamic theory of complex multiphase solid-liquid systems, by adjusting and controlling the adsorption equilibrium constant of collector(s) on a surface of lepidolite and gangue minerals and entropy change during adsorption process, a high-entropy collector suitable for efficient separation of lepidolite is developed. Without changing conventional flotation procedures, enhanced flotation of lepidolite could be achieved only by adding sodium carbonate as a modifying agent with a low amount of the high-entropy collector.

Modifier compositions, improved sparge compositions for froth flotation separation containing the modifier compositions, and improved methods of froth flotation using the modifier compositions have been developed, as well as kits including the modifier composition for industrial use. The modifier compositions obtain both improved yield and a higher grade of a targeted mineral product in froth flotation of one or more phosphate, lithium, and/or iron ores, while avoiding excess foam formation during the flotation.