Title:
【発明の名称】銅および貴金属のたい積浸出の集塊補助として用いられるポリマーの組み合わせ
Document Type and Number:
Japanese Patent JP2001505958
Kind Code:
A
Abstract:
An improved method for extracting a precious metal from mineral fines by heap leaching with dilute sulfuric acid which comprises agglomerating the mineral fines prior to formation into a heap with an agglomerating agent composition comprising sequential addition of a first polymer selected from the group consisting of anionic and nonionic water-soluble polymers and then a second cationic water-soluble polymer to the fines. Preferred first polymers are poly(acrylamide) and 70/30 mole percent poly(acrylamide/sodium acrylate), and preferred second polymers are poly(diallyldimethylammonium chloride), 90/10 mole percent poly(acrylamide/diallyldimethylammonium chloride) and 99/1 mole percent poly(diallyldimethylammonium chloride/vinyltrimethoxysilane).
Inventors:
Kell, E., Michael
Application Number:
JP52414299A
Publication Date:
May 08, 2001
Filing Date:
October 08, 1998
Export Citation:
Assignee:
Nerco Chemical Company
International Classes:
C22B1/244; C22B3/04; C22B3/26; C22B7/02; (IPC1-7): C22B1/244; C22B3/04
Attorney, Agent or Firm:
Yasuo Ishikawa (1 outside)