Decreasing Easily Slimed Gangue Minerals Effect on Copper-Nickel Bulk Flotation by Combinatorial Depressants

Abstract

This article research a low grade ore in Jinping, it contain 0.634% nickel, 0.329% copper, 0.047% cobalt, 30.18% SiO2, and 19.72% MgO. The rude ore contain amount of gangue minerals such as chlorite, mica, quartz, feldspar, which are easily slimed and have undesirable effect on flotation. In order to decrease such negative effect, this article investigated a method by “desliming-flotation” test, flotation test. Finally find that direct flotation is a promising method when utilizing carboxymethyl cellulose and sodium silicate as combinatorial depressants. And obtained the grade of bulk concentrate is 2.96% with recovery 60.82%, the recovery increased 2.43% compare with “desliming-flotation” test.