Flotation of silicates from ores
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) n -N(X) 2 , with the proviso that when R′ is —(CH2) n -N(X) 2 , then m is 1.
1. A process for enriching a mineral from a silicate-containing ore by carrying out a froth flotation in the presence of polyester polyammonium based compound collecting or co-collecting agent and a froth modifier, wherein said froth modifier is selected from the group consisting of 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) n -N(X) 2 , with the proviso that when R′ is —(CH2) n -N(X) 2 , then m is 1.
2. The process of claim 1 wherein X is an alkyl group containing from 1 to 2 carbon atoms.
3. The process of claim 1 wherein said froth modifier is n,n,n′-trimethyl-n′-tallow alkyltrimethylenediamine.
4. The process of claim 1 wherein said froth modifier is a tertiary alkylamine and is selected from the group consisting of tallow alkyl dimethylamine, coco alkyl dimethylamine, and mixtures thereof.
5. The process of claim 1 wherein said froth modifier is tallowalkyltriamine.
6. The process of claim 1 wherein the froth modifier is added to a pulp made from the ore in the form of an aqueous mixture.