Research Progress on Comprehensive Utilization of Tin Tailings Resources.

Tin is one of the few rare metals with important strategic position in our country' but the technical limitations of the comprehensive utilization have led to the increasing scarcity of in ore resources' the large loss rate of useful components' and the increase in the amount of tailings over the years. Tailings not only occupy a lot of land' but also pollute the surrounding environment. Therefore, it has great significance of the green utilization of tin tailings resources to ensure the safety of tin mineral resources in China. In this paper, the current situation and characteristics of tin tailings resources at home and abroad was in reduced. It was summarized that it the key of secondary benefication of the in tailings is to solve the influence of sulfide minerals iron and manganese mineras and slime on comprehensive recovery of tine cassiterite and co-associated valuable components. Meanwhile, the technological characteristics and cases of tin tailings research status are also summarized. At present, the main methods to re-use tin tailings include recovery valuable metals by gravity separation, magnetic separation, flotation and combined beneficiation and metallurgy, used tailings as building materials or mining tailings as a whole, and treated waste stone containing tin as a special tailings to pre-concentrated. The common collectors and regulators of cassiterite flotation and their action mechanism were summarized. The researches which should be strengthen in the future were proposed, including enhancing the recovery of tine cassiterite, enhancing the new gravity separation equipment of cassiterite separation, enhancing the development of new green reagents, and enhancing development of new flotation equipment. The future development trend based on the research hot topic was proposed, with a view to providing reference for the green and efficient utilization of in tailings. [ABSTRACT FROM AUTHOR]