| 摘要 |
<p>A method of reducing scaling in an alkaline treatment liquor circuit in a metal ore treatment process, in which metal ore is digested in an alkaline medium in a digestion stage to form a suspension of ore residue solids in an aqueous liquor containing metal values, separating the solids from the liquor in a separation stage and then transferring the aqueous liquor containing metal values to a metal values recovery circuit from which the metal values are precipitated and separated from the alkaline liquor, wherein scaling of the surfaces is reduced by introducing into the alkaline liquor an effective amount of polymeric scale suppressant, characterised in that the polymeric suppressant comprises an ammonium or alkali metal salt of a polymer having an average molecular weight below 50,000 and which is a copolymer comprising 30 to 99 weight % ethylenically unsaturated carboxylic acid moieties and 1 to 70 weight % isobutyl (meth) acrylate moieties.</p> |
