PROCESS TO TREAT MAGNETITE ORE AND COLLECTOR COMPOSITION
The present invention relates to a process to treat magnetite ore containing less than 15 wt % of silica on total ore, the process containing a step of (froth) flotating in the presence of a collector composition that contains 80 to 100 wt % of at least one alkylethermonoamine, less than 20 wt % alkyletherdiamine, all wt % based on total weight of all amine components, and wherein the alkylethermonoamine is an alkylethermonoamine with a degree of branching higher than 1, the alkyl containing 11 to 17 carbon atoms, and further relates to the collector composition that can be used in the process.
1 . Process to treat magnetite ore containing less than 15 wt % of silica on total ore solids, the process containing a step of (froth) flotating in the presence of a collector composition that contains 80 to 100 wt % of at least one alkylethermonoamine, less than 20 wt % alkyletherdiamine, all wt % based on total weight of all amine components, and wherein the alkylethermonoamine is an alkylethermonoamine with a degree of branching higher than 1, the alkyl containing 11 to 17 carbon atoms.
2 . Process of claim 1 , wherein the alkylethermonoamine contains between and 100 wt % isotridecyl(C13)etherpropylamine, 0 and 50 wt % of isododecyl(C12)etherpropylamine, 0 and 30 wt % of isoundecyl(C11)etherpropylamine, 0 and 30 wt % of isodecyl(C10)-etherpropylamine, 0 and 30 wt % tetradecyl(C14)etherpropylamine, all wt % being based on total weight of alkylethermonoamine.
3 . Process of claim 1 wherein the alkylethermonoamine contains between and 30 wt % isotridecyl(C13)etherpropylamine, 0 and 30 wt % of isododecyl(C12)etherpropylamine, 50 and 100 wt % of isoundecyl(C11)etherpropylamine, 0 and 30 wt % of isodecyl(C10)-etherpropylamine, 0 and 30% tetradecyl(C14)etherpropylamine, all wt % being based on total weight of alkylethermonoamine.
4 . Process of claim 1 wherein the degree of branching of the alkylethermonoamine is between 1.5 and 3.5.
5 . Process of claim 1 wherein the collector composition contains less than 5 wt % of alkyletherdiamine on total amine components.
6 . Process of claim 1 wherein the process to treat magnetite ore is a process to enrich iron from silica.
7 . Process of claim 1 wherein the process is a reverse flotation process.
8 . Process of claim 1 wherein the collector composition contains further additives selected from the group of depressants, froth modifiers, pH regulators, and neutralizing agents.
9 . Process of claim 1 wherein the collector composition additionally contains a secondary collector, preferably selected from the group of branched alkyl fatty alcohols and alkoxylated alkyl fatty alcohols.
10 . Process of claim 1 wherein the ore contains less than 10 wt % of silica on total ore solids.
11 . Collector composition containing 80 to 100 wt % of at least one alkylethermonoamine, less than 20 wt % alkyletherdiamine, all wt % based on total weight of all amine components, and wherein the alkylethermonoamine is an alkylethermonoamine with a degree of branching higher than 1 and contains between 0 and 30 wt % isotridecyl(C13)etherpropylamine, 0 and 30 wt % of isododecyl(C12)etherpropylamine, 50 and 100 wt % of isoundecyl(C11)-etherpropylamine, 0 and 30 wt % of isodecyl(C10)etherpropylamine, 0 and 30 wt % tetradecyl(C14)etherpropylamine, all wt % being based on total weight of alkylethermonoamine.
12 . Collector composition of claim 11 wherein the degree of branching of the alkylethermonoamine is between 1.5 and 3.5.
13 . Collector composition of claim 11 wherein the collector composition contains less than 5 wt % of alkyletherdiamine on total amine components.