What reagents are used for tin ore flotation?

Cassiterite is brittle and easy to be over-crushed. Once the cassiterite particles are too small, it will have a great negative impact on its recovery rate. Therefore, flotation can be used as a key method for the effective recovery and utilization of fine-grained cassiterite. With the gradual development of science and technology, more and more collectors have been developed and widely used in the flotation of fine-grained cassiterite. The flotation process has also been greatly improved, such as the ability to stir the slurry vigorously, use related equipment to classify and desludging it, and effectively control the lower limit of the classification particle size and the desludging particle size.

The collectors used in the flotation process are mainly of the following types: ① Fatty acids: mainly oleic acid, soaps, etc., which can react with alkaline earth metal ions to produce insoluble salts, adsorb minerals, and have a good separation rate for tin ore. ② Alkyl hydroxamic acid can produce chemical adsorption on the surface of minerals, but its adsorption capacity is unstable and its resistance to desorption is weak, so it can be used selectively. ③ Phosphonic acid: mainly includes the following two types: aromatic phosphonic acid, which has high capture performance and strong regulation, but its selectivity is poor and is not suitable for use; styrene phosphonic acid has strong capture ability and high selectivity. ④ Arsonic acid: There are certain differences in the capture performance of different types of arsenic acid. The capture effect of alkyl arsenic acid is general, while the capture effect of aryl arsenic acid is better and has higher adaptability.