Process and composition for the froth flotation beneficiation of iron minerals from iron ores
AssigneeBerol Kemi AB
InventorsMartin Hellsten, Marie Ernstsson, Bo Idstrom
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Abstract
A process and composition are provided for the froth flotation beneficiation of iron minerals from iron ores containing silicate and phosphate minerals, comprising as collectors a combination of a primary amine and a nitrogen compound containing an anionic group selected from methylene carboxylic acid, ethylene phosphoric acid and methylene phosphonic acid.
Claims26
A process for the froth flotation beneficiation of iron minerals from iron ores containing silicate and phosphate minerals while preferentially and selectively floating the silicate and phosphate minerals, which comprises carrying out the flotation at an alkaline pH in the presence of a primary amine having the formula:
- R.sub.1 [OC.sub.n.sbsb.1 H.sub.2n.sbsb.1 ].sub.m.sbsb.1 --[NHC.sub.n.sbsb.2 H.sub.2n.sbsb.2 ].sub.m.sbsb.2 --NH.sub.2 I
- in which:
- R.sub.1 is a hydrocarbon group having from about six to about eighteen carbon atoms;
- n.sub.1 and n.sub.2 are 2 or 3;
- and
- m.sub.1 is from 0 to 1 and m.sub.2 is from 0 to 1;
- and an anionic group containing compound having the formula:
- ##STR24## in which:
- R.sub.2 is a hydrocarbon group having from about one to about twenty-four carbon atoms;
- X is a a group ##STR25## n.sub.3 is a number form 2 to 4;
- m.sub.3 is a number from 0 to 4 ;
- m.sub.4 is 0 or 1;
- m.sub.5 is 0 or 1;
- m.sub.6 is 0 or 1;
- R.sub.3 is selected from the group consisting of hydrogen;
- hydrocarbon groups having from one to about eighteen carbon atoms;
- and ##STR26## R.sub.4 is selected from the group consisting of methylene carboxylic acid --CH.sub.2 COOH;
- methylene phosphonic acid ##STR27## and ethylene phosphoric acid ##STR28## and salts thereof.
Dependencies are inferred from the claim text.