The process of magnesy neodymowe waste recycling:

　　The process of magnesy neodymowe waste recycling:

　　Hydrochloric acid method

　　The hydrochloric excellent dissolution method's principle is strict to control acid decomposition process conditions, rare earth in waste is preferentially dissolved in hydrochloric acid solution. The excellent solution method is composed of oxidizing roasting decomposition impurity, extraction, precipitation burning 4 parts.

　　Oxidizing roasting:

　　This step is critical in dissolving method, transfering rare earth into oxide, iron into Fe2O3, in order to facilitate the next step of acid decomposition;

　　Decomposition impurity:

　　Add a small amount of water in the reactor, add dividedly into hydrochloric acid and rare earth material, control the concentration and pH of rare earth, let dissolve preferentially extraction: except for rare earth chloride solution after mixed with P50 separation of rare earth elements, are rare earth chlorides single; the burning : the extraction liquid into the sedimentation tank, adding ammonium oxalate precipitation agent, are rare earth oxalate or rare earth carbonate precipitation, burning, are rare earth oxides.