废铅酸电池铅膏的脱硫除杂和四碱式硫酸铅制备的研究化学工程与技术专业论文.docxVIP

AbstractIt Abstract It was important and difficult that spent lead acid battery lead paste desulfurization for achieving lead recycling．Wet desulphurization process can meet the demand of the modem industrial development，which focuses on the green and energy-saving．And the metal impurities need to remove in the paste，high quality secondary lead would be needed in the industrial production．In addition，the research on appropriate electrode materials for improving the battery performance，will be an important topic for achieving the sustainable development of the lead acid battery industry． ’I’he currently most adopted process of desulfurization have two drawbacks in high energy consumption and pollution．The lead paste comes from certain company． It discussed the urea solution as leaching agent for desulfurization experiment effect and application prospect．Urea solution leaching Lead(II)sulfate(PbS04)has been experimented in spent lead paste，which had converted into easily decompose Lead(II) carbonate basic(PbC03)and achieved the spent lead-acid batteries recovery by greener technology．The desulfurization rate Can reach more than 60％with the T= 105℃，t=6 h，L／S=5，～T=5：The products was detected by XRD and SEM．The urea system desulfurization reaction has conversed PbS04 into PbC03 with slowly development from the surface of the paste． Tllis article explored a new method of removing impurity elements in the process of desulfurization on spent lead paste．Using spent lead paste as a raw material，with secondary Carbon primary Amine(N 1 923)and Tributyl Phosphate(TBP)as the extraction together removing metal impurities in the paste．This study examined the influence of various reaction factors on the effects of the extraction．It can achieved the most effective of each metal impurities in the spent lead paste with the conditions ofoil phase wt．州1923)=25％，wt．(TBP)=50％，T=40。C，t=8h． Tetrabasic lead sulfates(4BS)is a kind of important material for improving lead-acid battery．It can so