Iron chelators as activators in alkaline flotation circuits

Patent metadata

Field	Value
Publication number	US-12240000-B2
Application number	US-201917256710-A
Country	US
Kind code	B2
Filing date	Jul 3, 2019
Priority date	Jul 4, 2018
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

The present invention is directed to a method for selectively recovering a mineral from an ore applying a promoter being a substituted ethylene diamine. Further, the present invention is directed to the use of said substituted polymeric alkylenediamine to separate a target mineral from an ore.

First claim

The invention claimed is:

1. A method for selectively recovering a mineral from an iron comprising ore, comprising:
i) grinding the iron comprising ore,
ii) preparing a pulp of the ground ore obtained in step i),
iii) adding at least one promoter comprising at least one substituted polymeric alkylene diamine as an iron chelator to the pulp obtained in step ii), wherein the at least one substituted polymeric alkylene diamine is a substituted polymeric ethylene diamine of formula (IIb)

wherein m is in the range of 1 to 150, the substituents R 5 are independently from each other H, Li, Na or K, and * is Z 2 N, where Z is independently from each other

Y is a carboxylate (—COOR 5 ), sulfonate (—SO 3 R 6 ), sulfate (—O—SO 3 R 7 ), phosphonate (—P(═O)(OR 8 )(OR 9 ), phosphate (—O—P(═O)(OR 10 )(OR 11 ) carboxylic acid (—COOH), sulfonic acid (—SO 3 H), phosphonic acid (—P(═O)(OH) 2 ), phosphoric acid (—O—P(═O)(OH) 2 ) moiety, or their deprotonated forms,
R 5 , R 6 and R 7 are independently from each other H, alkyl, aryl, alkylaryl or arylalkyl, Li, Na or K, R 8 and R 10 are independently from each other alkyl, aryl, alkylaryl or arylalkyl, and
R 9 and R 11 are independently from each other H, alkyl, aryl, alkylaryl or arylalkyl; and
iv) subjecting the pulp containing the at least one promoter obtained in step iii) to froth flotation.

2. The method according to claim 1 , wherein pH of the pulp is adjusted to a range of 8.0 to 12.0.

3. The method according to claim 1 , wherein concentration of the at least one promoter within the pulp is in the range of 5 to 250 g/t.

4. The method according to claim 1 , wherein the pulp further comprises at least one collector.

5. The method according to claim 4 , wherein the collector is selected from the group consisting of xanthates, dithiophosphates, thionocarbamates, dithiocarbamates, xantoformiates, xanthate esters, dithiophosphates, monothiophosphates, dithiophosphinates, hydroxamic acids and their alkali metal or ammonium salts, alkyl-, alkenyl- and arylphosphonic acids and salts thereof, phosphoric acid mono- and diesters with long chain alcohols or alcoxylated alcohols and salts thereof, mixtures of the collectors mentioned above with fatty acids and their salts, and mixtures thereof.

6. The method according to claim 1 , wherein the pulp further comprises at least one frother.

7. The method according to claim 1 , wherein the iron comprising ore comprises gold, copper or a combination thereof.

8. The method according to claim 1 , wherein the substituents R 5 are independently from each other H or Na and 90 to 100 mol % of the substituents R 5 are Na.

9. The method according to claim 1 , wherein Z is independently from each other

10. A method of using at least one promoter to separate a target mineral from an iron comprising ore, comprising:
i) grinding the iron comprising ore;
ii) preparing a pulp of the ground iron comprising ore;
iii) combining the pulp with at least one promoter comprising at least one substituted polymeric alkylene diamine as an iron chelator to the pulp obtained in step ii), wherein the at least one substituted polymeric alkylene diamine is a substituted polymeric ethylene diamine of formula (IIb)

wherein, m is in the range of 1 to 150, the substituents R 5 are independently from each other H, Li, Na or K and * is Z 2 N, where Z is independently from each other

Y is a carboxylate (—COOR 5 ), sulfonate (—SO 3 R 6 ), sulfate (—O—SO 3 R 7 ), phosphonate (—P(═O)(OR 8 )(OR 9 )), phosphate (—O—P(═O)(OR 10 )(OR 11 )), carboxylic acid (—COOH), sulfonic acid (—SO 3 H), phosphonic acid (—P(═O)(OH) 2 ), phosphoric acid (—O—P(═O)(OH) 2 ) moiety, or their deprotonated forms,
R 5 , R 6 and R 7 are independently from each other H, alkyl, aryl, alkylaryl or arylalkyl, Li, Na or K, R 8 and R 10 are independently from each other alkyl, aryl, alkylaryl or arylalkyl, and
R 9 and R 11 are independently from each other H, alkyl, aryl, alkylaryl or arylalkyl; and
iv) subjecting the pulp containing the at least one promoter to froth flotation to separate the target mineral from the ore.

11. The method according to claim 10 , wherein the target mineral contains gold or copper.

Assignees

• Basf Se

Inventors

• Villanueva Berindoague Adrian Mauricio
• Barron Dale
• Chipfunhu Daniel
• Michailovski Alexej
• Dickie Scott Alexander
• Reinoso Garcia Marta
• Prawira Deris

Classifications

• C22B3/20

  Treatment or purification of solutions, e.g. obtained by leaching (C22B3/18 takes precedence) · CPC title

• C22B15/0089

  by chemical methods · CPC title

• C22B11/042

  Recovery of noble metals from waste materials · CPC title

• C02F2103/10

  from quarries or from mining activities · CPC title

• C02F1/54

  using organic material · CPC title