Sulfur Floating Test of a Cyanide Tailings in Liaoning
In order to further improve the comprehensive utilization efficiency of cyanide tailings in a gold sorting plant in Liaoning Province,based on the study of sample properties,the effects of the type of adjustment agent,the type and dosage of collector,the amount of foaming agent,the pH value of pulp and the amount of scavenging reagent on the sorting effect were in-vestigated by single factor condition test and open and closed circuit test.The appropriate reagent system and process flow of flotation recovery process were determined.The results showed that:① gangue minerals in cyanide tailings are mainly alumino-silicates,and the element with recycling value is S,which occurs in pyrite and is the main valuable recovery component.② 54.98％of cyanidation tailings with particle size less than 0.038 mm and 77.44％with particle size less than 0.074 mm were studied by flotation directly without grinding.③ The appropriate flotation reagent system for the tailings after cyanide breaking by Inke method is:the dosage of collector butyl xanthoxanthate of 160 g/t,the dosage of foaming agent No.2 oil of 30 g/t,the dosage of scavenging foaming agent No.2 oil of 10 g/t,and the pH value of pulp of 7.2.Under the above reagent sys-tem,the flotation concentrate with sulfur grade of 44.20％and sulfur recovery rate of 58.73％could be obtained through the closed-circuit flotation process of"one roughing,two cleaning and two scavenging".In this study,the appropriate technological conditions for sulfur recovery of cyanide tailings were determined,and the valuable components of cyanide tailings in gold pro-cessing plant were efficiently extracted and utilized cleanly.
万方数据
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