Compositions including blends of one or more acrylamide/allyl thiourea polymer as a first depressant, and one or more carboxyalkyl dithiocarbamate compound as a second depressant, and their use as depressants in the beneficiation of sulfide minerals from ores and/or concentrates are disclosed herein, along with methods for selectively separating value sulfide minerals from non-value sulfide minerals in a froth flotation process for the recovery of such value minerals.

The present invention discloses mining collector compositions containing sodium metabisulfite and a thiocarbonate compound. Flotation processes for recovering molybdenum from a copper-molybdenum concentrate using the collector compositions also are disclosed.

Depressants comprising a moderately oxidized polysaccharide having about 0.05 to about 4.5 mmol of anionic charge per gram at a pH of about 6 to about 7, or about 0.2 to about 5 mmol of anionic charge per gram at a pH of about 10 to about 11.2, are provided. Also disclosed are processes for enriching a desired mineral from an ore comprising the desired mineral and gangue, wherein the process comprises carrying out a flotation process in the presence of one or more of the depressants.

A magnesium suppressant/flocculant for use in separating dolomite from calcium phosphate. The magnesium suppressant/flocculant may be applied at a mine site prior to subjecting ore fractions to phosphate flotation or at a chemical plant after grinding.

The invention relates to a method for manufacturing a concentrate enriched in iron mineral content from an ore, which contains an iron mineral and silicate, by a reverse flotation, which method comprises the step of (c) adding a collector composition comprising (i) an amidoamine, which contains a compound of formula I

##STR00001## or a salt of a protonated compound of formula I and an anion; (ii) an ethoxylate, which contains a compound of formula II

R.sup.EO(CH.sub.2CH.sub.2O).sub.nH(II), wherein R.sup.E is a linear or mono-branched aliphatic C.sub.10-C.sub.20 alkyl or a linear aliphatic C.sub.10-C.sub.20 alkenyl, and n is an integer from 1 to 12,
to a prepared aqueous pulp of the ore and optionally one or more flotation auxiliary to obtain an aqueous mixture. Furthermore, the use of the collector composition as a flotation collector is described and the collector composition itself

The invention relates to a method for manufacturing a concentrate enriched in iron mineral content from an ore, which contains an iron mineral and silicate, by a reverse flotation, which method comprises the step of (c) adding a collector composition comprising (i) an amidoamine, which contains a compound of formula I

##STR00001##

or a salt of a protonated compound of formula I and an anion, and (ii) an alkyl polyglycoside, which contains a compound of formula II

##STR00002##

wherein R.sup.AP is a linear or branched C.sub.6-C.sub.22 alkyl or a linear C.sub.6-C.sub.22 alkenyl, G.sup.1 is a monosaccharide residue having 5 or 6 carbon atoms, x is an average value from 1 to 10,
to a prepared aqueous pulp of the ore and optionally one or more flotation auxiliary to obtain an aqueous mixture. Furthermore, the use of the collector composition as a flotation collector is described and the collector composition itself

(Technical problems to be solved) Providing a method for selecting minerals containing arsenic (Means for solving the problems) A peptide comprising an amino acids sequence according to the following formula: (TSNQ)-(HPW)-(ED)-(HPWRK)-(LIVFA)-(LIVFA)-(LIVFA)-(TSNQ)-(HPW)-(LIVFA)-(TSNQ)-(LIVFA) wherein one amino acid is respectively selected from each group defined by paired parentheses.

Compositions including blends of one or more acrylamide/allyl thiourea polymer as a first depressant, and one or more carboxyalkyl dithiocarbamate compound as a second depressant, and their use as depressants in the beneficiation of sulfide minerals from ores and/or concentrates are disclosed herein, along with methods for selectively separating value sulfide minerals from non-value sulfide minerals in a froth flotation process for the recovery of such value minerals.

In producing a copper concentrate by flotation in which copper minerals are separated from arsenic minerals by using oxoacids of sulfur and oxidants, the arsenic in the copper concentrate is reduced by a simple method. In producing the copper concentrate by the flotation in which an arsenic-containing copper ore is a raw material, the oxoacids of sulfur and hydrogen peroxide as the oxidant are used together as additive reagents, and added in this order.

A process for recovering a first mineral comprising the steps of: (a) providing a pulp comprising solids and water, wherein the solids comprise the first mineral; (b) adding a first depressant to the pulp; (c) subjecting the pulp to a froth flotation process to produce a froth comprising the first mineral; and (d) recovering the froth; characterized in that the first mineral is a sulfide mineral, and the first depressant consists of one or more dithiocarbamic acids or salts thereof of formula (I). A composition comprising the first depressant, and further comprising one, two or three of a collector, a second depressant and a mineral. The use of a dithiocarbamic acid or salt thereof of formula (I). The dithiocarbamic acid or salt thereof of formula (I) which is 3-ammo-1,2-propanediol dithiocarbamic acid or a salt thereof, 2-amino-2-methyl-1,3,-propanediol dithiocarbamic acid or a salt thereof, or N-phenylethylenediamine dithiocarbamic acid or a salt thereof.