| The management and final disposal spent secondary battery has becoming increasingly urgent, with the a large number of the production, use and utilization of secondary battery. Recycling treatment is having attracted more and more attentions in all treatment,but also the most promising: it can not only solve the enviromental problems,but also slows the lack of recource effectively by recoving and reusing of valued metals of spent secondary battery. it has become the best way to deal with and control the spent secondary battery.This paper summarized and compared Pyrometallurgical,hydrometallurgica and other new renewable technologies of the current treatment of spent secondary battery, and pointed out that the advantages and disadvantages of the current stage treatment,for that propose the hydrometallurgical with the acid leaching and Technical co-precipitation combined to recovery and prepare ofα-Ni(OH)2 cathode materials: spent secondary battery electrode active material leach in H2SO4, the leaching fluid after decontamination treatment, by adding elements regulate ion-ion ratio, to prepareα-Ni(0H)2 cathode materials by co-precipitation. By recovering the Ni and Co,that did not result in a loss of valuable metal elements, and compared at this stage of hydrometallurgica, Not putting burdensome purification process as a key, Having avoided the complex extraction method, preparedα-Ni(OH)2 positive electrode material. Treatment with raw material to be inexpensive easy, the flow to be simple, the energy consumption low, does not have the second pollution, is one economical, environmental protection green circulation technology processing.The spent secondary battery electrode active material mainly composed by the LaNi5,Ni(OH)2,LiCoO2. Through thermodynamics computation analysis, for leaching active materials of batteries provides a theoretical basis and ways. indicates the electrode active material in H2SO4 leaching process, Has carried on the electrode active material in sulfuric acid leaching orthogonal experiment, has analyzed the sulfuric acid density, the temperature, the time to Ni, Co leaching rate influence, discovers the best leaching condition: Extraction time 90min, the leaching temperature 80℃, the sulfuric acid initial density is 3.0 mol/L. And based on raw material structure, the leaching result has also did analysis discussion about the related influencing factor.Based on the leaching solution ion ingredient composition and the follow up preparation product's craft, uses the sulfuric acid duplicate salt precipitation method recycling rare earth, controls the pH value except Al,Fe,the ammonium persulfate separates the leaching solution except the manganese cleaning treatment craft the foreign ion, obtains the ion purifying rate achieves above 95%.After purification on the ion composition of liquid, add the element to regulation of ion concentration, based on the Ni-Co purified liquid, respectively, dopping Al3+,Fe3+,La3+ to prepare Ni(OH)2 by co-precipitation, after analysis of XRD determine the doped Ni(OH)2 for the a, and through a series of performance analysis shows that the preparation ofα-Ni(OH)2 to stabilize the structure.
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