Patent ID: 6090297
Filing Date: 2000-07-18
Classification: C01B,Y10S

Abstract:
A process for treating precious metal tailing slurries with a Caro's acid mixture accompanied by reduced amounts of Caro's acid mist, said process comprising:(a) reacting sulfuric acid and hydrogen peroxide in a reaction zone to form a hot Caro's aced mixture(b) removing the hot Caro's acid mixture at a temperature of at least 52.degree. C. from the reaction zone, said hot Caro's acid mixture accompanied by whatever Caro's acid mist is formed from said Caro's acid;(c) quenching said hot Caro's acid mixture with water outside the reaction zone to both cool and dilute said hot Caro's acid mixture;(d) introducing the resulting cooled and diluted Caro's acid mixture, whose evolution of Caro's acid mist has been reduced or eliminated, into a precious metal tailings slurry, the tailings slurry containing cyanide values; and(e) reacting the cyanide values with the Caro's acid to reduce the amount of cyanide values remaining in the tailings slurry.