Abstract: Disclosed is a microwave chemical method for totally extracting fluorine and rare earth from bastnaesite concentrate, including: alkaline conversion defluorination of bastnaesite through microwave irradiation, microwave-assisted leaching of fluorine, solid-liquid separation of leaching solution and microwave-assisted leaching of rare earth. The rare earth hydrochloric acid solution for leaching contains no fluorine ion, so that the fluorine interference of subsequent processes such as impurity removal can be completely avoided; the fluorine and the rare earth are leached with microwaves, which does not need the stirring, so that the automatic control is easy to implement; the fluorine and rare earth leaching speed is high, the leaching time is short and the complete leaching of fluorine and little residual alkali in the slag can be realized by two-time leaching; and no fluorine-containing waste water is discharged, and the total extraction of the rare earth can be realized by one-time leaching.

Abstract: An ammonium complex system-based method for separating and purifying lead, zinc, cadmium, and copper, comprising the following steps: a zinc-containing raw material is leached using a leach solution to produce a leached solution; a filtrate and a filter residue are produced by filtration; the filtrate is mixed with metal lead to displace copper, undergoes a solid-liquid separation to produce a first separated liquid, is mixed with metal cadmium to displace lead, undergoes a solid-liquid separation to produce a second separated liquid, is mixed with metal zinc to displace cadmium, and undergoes a solid-liquid separation to produce a third separated liquid; and, the third separated liquid is electrolyzed to produce metal zinc, and an electrolytic solution is returned to the leaching step.

Abstract: Disclosed is a method for enhancing leaching of metals in zinc hypoxide powder by mechanochemistry coupling with sonochemistry, comprising the following: mechanical activation: a raw material containing zinc hypoxide powder is mechanically activated so that an activated material is obtained; and ultrasonic treatment: the activated material is mixed with an acidic leaching solution to obtain a mixture, the mixture is subjected to ultrasonic treatment, and a liquid phase is obtained as the leachate. Mechanochemical activation and ultrasonic chemistry synergistically enhance the leaching efficiency and leaching rate of multiple metals through the destruction and cavitation of the zinc oxide powder structure. This process can indirectly reduce the concentration of the used acidic leaching solution and shorten the leaching duration.

Abstract: Disclosed is a method for enhancing leaching of metals in zinc hypoxide powder by mechanochemistry coupling with sonochemistry, comprising the following: mechanical activation: a raw material containing zinc hypoxide powder is mechanically activated so that an activated material is obtained; and ultrasonic treatment: the activated material is mixed with an acidic leaching solution to obtain a mixture, the mixture is subjected to ultrasonic treatment, and a liquid phase is obtained as the leachate. Mechanochemical activation and ultrasonic chemistry synergistically enhance the leaching efficiency and leaching rate of multiple metals through the destruction and cavitation of the zinc oxide powder structure. This process can indirectly reduce the concentration of the used acidic leaching solution and shorten the leaching duration.