The instant invention relates to a composition in form of a stable aqueous emulsion comprising a) 1-50 wt.-% of at least one water insoluble thionocarbamate collector selected from the group consisting of dialkyl thionocarbamates, alkyl alkoxycarbonyl thionocarbamates and alkyl allyl thionocarbamates, b) 1-50 wt.-% of one or a mixture of surface active agents of the general formula ##STR00001## wherein R.sup.1 is a saturated or unsaturated, branched or linear C.sub.3 to C.sub.30 aliphatic or aromatic hydrocarbon group, R.sup.2 and R.sup.3 are independently from each other hydrogen or a C.sub.1 to C.sub.4 alkyl group, R.sup.4 is hydrogen or CH.sub.2COOX where X is hydrogen or sodium salt or potassium salt or ammonium salt, and n and m are independently from each other 0 to 50, c) 0.1-20 wt.-% of a mixture of at least one alcohol and at least one ether and/or ester, e) 1-90 wt.-% of water.

A process for recovery of gold from gold-containing raw materials includes obtaining gold-containing raw material having refractory gold-containing sulfidic minerals including a first type of refractory sulfidic mineral having high gold content and a second type of sulfidic mineral having low gold content; forming a mineral pulp including a first type of refractory sulfidic mineral particles having high gold content and second type of sulfidic mineral particles having low gold content by suspending ground gold-containing material in water and optionally further milling the material; conditioning the mineral pulp by addition of a surface modifying chemical to obtain a conditioned pulp; subjecting the conditioned pulp to a froth flotation process; recovering the non-floatable first type of refractory sulfidic mineral particles having high cold content as flotation tailings; pressure oxidizing (PDX) the flotation tailings to obtain a discharge slurry comprising liberated gold; and recovering gold from the discharge slurry.

A method of recovering gold and copper from a sulfide ore includes (a) removing valuable fines from a product stream from a comminution circuit, such as a crushing and milling circuit, for run of mine ore and producing a valuable fines concentrate stream and (b) processing the remaining comminution product stream after valuable fines removal and producing a valuable coarse concentrate stream.

Described herein is a method for the recovery of two major valuable lithium minerals (amblygonite and spodumene), a cesium mineral (pollucite) and quartz. The method comprises a series of direct flotation processes combined with reverse flotation processes that were designed to recover these lithium and cesium concentrates.

The subject invention provides safe, environmentally-friendly, compositions and methods for extracting minerals and/or metals from rock, ore, tailings, and/or coal combustion wastes. More specifically, the subject invention provides for enhanced froth flotation, including direct flotation or reverse flotation, of rock, ore, tailings, and/or coal fly ash using a composition comprising one or more biosurfactants.

The present invention discloses water-based mining collector compositions containing dodecylmethyl sulfide. Floatation processes for recovering metals, such as copper and molybdenum, from ores using the mining chemical collector compositions also are disclosed.

THIS invention relates to a process for the enhanced recovery of chromite and platinum group metals (PGMs) from a mixed chromite/PGM ore. Ore is ground 12, classified 14, to produce a coarse fraction and a fine fraction 36. The coarse fraction is subjected to gravity separation 16 and coarse particle flotation 20 to obtain a chrome concentrate and a PGM concentrate. The fine fraction 36 and PGM concentrate are ground 28, and subjected to conventional flotation 30 to obtain a PGM concentrate product 32. The benefits of this novel configuration of gravity concentration and coarse flotation technologies, as applied to both chromite and PGM recovery, are higher recoveries of chromite in a saleable concentrate, higher recoveries of PGMs and base metals, and lower chromite content in the PGM concentrate.

A method of recovering free milling gold from a gold-containing feed material that includes processing at least a part of a tailings stream from a flotation element in a size separation element and producing a fines stream and a coarse stream. The method also includes recovering free milling gold from at least one of the fines stream and the coarse stream.

The instant invention relates to a composition in form of a stable aqueous emulsion comprising a) 1-50 wt.-% of at least one water insoluble thionocarbamate collector selected from the group consisting of dialkyl thionocarbamates, alkyl alkoxycarbonyl thionocarbamates and alkyl allyl thionocarbamates, b) 1-50 wt.-% of one or a mixture of surface active agents of the general formula

##STR00001## wherein R.sup.1 is a saturated or unsaturated, branched or linear C.sub.3 to C.sub.30 aliphatic or aromatic hydrocarbon group, R.sup.2 and R.sup.3 are independently from each other hydrogen or a C.sub.1 to C.sub.4 alkyl group, R.sup.4 is hydrogen or CH.sub.2COOX where X is hydrogen or sodium salt or potassium salt or ammonium salt, and n and m are independently from each other 0 to 50, c) 0.1-20 wt.-% of a mixture of at least one alcohol and at least one ether and/or ester, e) 1-90 wt.-% of water.

A collector composition comprising (a) refined tall oil wherein the refined tall oil is any tall oil that has been subjected to one or more refining or processing steps that results in an increase in acid value; and (b) a fatty acid wherein the refined tall oil has an acid value of at least 90 mg KOH/g and a weight average molecular weight of at least 750 g/mol. A mineral slurry comprising (a) an ore comprising a mineral of interest; (b) a collector composition comprising (i) a refined tall oil; and (ii) a fatty acid; and (c) a liquid. A method for the beneficiation of an ore, the method comprising (a) preparing a slurry comprising the ore dispersed in a liquid; (b) contacting the slurry with a collector composition comprising a refined tall oil; and (c) recovering a beneficiated ore.