| abstract |
A method for improving the grade of fine-grained cassiterite, comprising the following steps: firstly placing the fine-grained cassiterite coarse concentrate in a mixing tank to adjust ore pulp to a mass concentration of 40-45%, then adding sodium persulfate as a mineral surface cleaning agent, Add tributyl phosphonate as a mineral defoamer and stir in a mixing bucket for 30 to 35 minutes, then use a high-frequency fine sieve to classify the fine-grained cassiterite coarse concentrate, and use the classified fine-grained cassiterite coarse concentrate for The fine-grained shakers are re-selected separately, and the fine-grained shaker concentrates of different particle sizes are recovered. Finally, the fine-grained shaker concentrates of different particle sizes are combined, and oxalic acid is used as a gangue mineral inhibitor, and lead nitrate is used as cassiterite. Mineral activator, styrene phosphonic acid as cassiterite collector to obtain final cassiterite concentrate. By adopting the invention, the grade of fine-grained cassiterite can be effectively improved, and under the condition that the grade of cassiterite is 3.57-5.66% in the feeding ore, the fine-grained cassiterite concentrate with the grade of cassiterite of 45.87-48.54% and the recovery rate of 75.17-79.74% can be obtained . |