Research Status and Prospect of Iron Tailings Re-separation Process in China
In order to further realize the efficient separation of iron tailings and provide a reasonable reference for the optimization of iron tailings re-separation process,the re-separation processes such as sin-gle separation,gravity-magnetic flotation combination,magnetization roasting-magnetic separation and dis-persion-selective flocculation in China are discussed in depth.The current status of efficient re-separation and recovery technology of iron minerals in iron tailings in China in recent years is analyzed and summa-rized.It is concluded that the single separation process is suitable for iron tailings with simple mineral com-position,which is easy to operate and low in cost.For iron tailings with complex composition,the combined separation process of gravity and magnetic flotation is usually used to re-select iron-containing minerals.When the particle size of iron tailings is too fine,the use of dispersion-selective flocculation process can ef-fectively solve the problem of mineral slime and avoid the loss of fine minerals.For the iron tailings that can-not be efficiently separated by the traditional separation process,the magnetization roasting-magnetic sepa-ration technology can be used to improve the separation index and realize the resource utilization of iron tail-ings.Under the current dual-carbon background,the research direction of iron mineral re-separation tech-nology in China's iron tailings in the future will focus on tailings re-separation grading pretreatment,green low-temperature flotation reagent development,magnetization roasting-magnetic separation in industrial production application,hydrogenation reduction process and so on.
iron tailingsre-separation processresearch progress
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