Recently, the Institute of Iron and Steel Metallurgy of Northeastern University has mastered the key technology for the direct preparation of rare earth composite iron oxide pigments from rare earth waste acid. It is understood that Northeastern University's new generation of steel material preparation technology laboratory has long been engaged in research on resource recycling. The project uses iron mud produced by iron and steel enterprises as raw materials, and reacts with waste sulfuric acid to prepare heavy-duty anti-corrosion rare earth composite iron oxide by hydrothermal method, thereby realizing comprehensive utilization of waste sulfuric acid and iron mud resources. At present, the extraction of rare earths in China generally uses concentrated sulfuric acid high temperature roasting-acid leaching technology (also known as "three generations" acid method rare earth process technology), which produces a large amount of waste sulfuric acid in the production process, which is not only costly and difficult to handle, but also Containing Fe and RE elements, if simply processed and then discharged, will not only cause great waste of resources, but also pollute the environment. Therefore, the harmless and resourceful use of rare earth waste acid resources is of great significance to the rare earth industry.
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Northeastern University has mastered the key technology of direct preparation of rare earth composite iron oxide pigments from rare earth waste acid
Abstract Recently, the Institute of Iron and Steel Metallurgy of Northeastern University has mastered the key technology for the direct preparation of rare earth composite iron oxide pigments from rare earth waste acid. It is understood that Northeastern University's new generation of steel material preparation technology laboratory has long been engaged in research on resource recycling. This project is a steel company...