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首页> 外文期刊>Environmental Science & Technology >An Emission-Free Vacuum Chlorinating Process for Simultaneous Sulfur Fixation and Lead Recovery from Spent Lead-Acid Batteries
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An Emission-Free Vacuum Chlorinating Process for Simultaneous Sulfur Fixation and Lead Recovery from Spent Lead-Acid Batteries

机译：同时进行固硫和从废铅酸电池中回收铅的无排放真空氯化工艺

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摘要

Spent lead-acid battery recycling by using conventional technologies is usually accompanied by releases of lead-containing wastewater as well as emissions of sulfur oxides and lead particulates that may potentially cause secondary pollution. This study developed a vacuum chlorinating process for simultaneous sulfur fixation and high-purity lead chloride (PbCl_(2)) recovery from spent lead paste by using calcium chloride (CaCl_(2)) and silicon dioxide (SiO_(2)) as reagents. The process train includes pretreatment, simultaneous PbCl_(2) production and sulfur fixation, and PbCl_(2) volatilization. The pretreatment eliminated chlorine emission from direct chlorinating reaction of PbO_(2) in the initial S-paste (PbSO_(4)/PbO_(2)/PbO/Pb). During the subsequent PbCl_(2) production and sulfur fixation step, lead compounds in the P-paste (PbSO_(4)/PbO) was converted to volatile PbCl_(2), and sulfur was simultaneously fixed to the solid residues in the form of CaSO_(4) to eliminate the emission of sulfur oxides. The final step, PbCl_(2) volatilization under vacuum, is a physical phase-transformation process of ionic crystals, following a zeroth-order kinetic model. A cost estimate indicates a profit of USD $ 8.50/kg PbCl_(2). This process offers a novel green lead recovery alternative for spent lead-acid batteries with environmental and economic benefits.
机译：使用常规技术对废铅酸电池进行回收通常会伴随着含铅废水的排放以及可能潜在引起二次污染的硫氧化物和铅微粒的排放。这项研究开发了一种真空氯化工艺，用于同时使用氯化钙（CaCl_（2））和二氧化硅（SiO_（2））从废铅浆中固定硫和高纯度氯化铅（PbCl_（2））的回收。该过程包括预处理，同时生产PbCl_（2）和固定硫以及PbCl_（2）挥发。预处理消除了初始S糊剂（PbSO_（4）/ PbO_（2）/ PbO / Pb）中PbO_（2）的直接氯化反应中的氯排放。在随后的PbCl_（2）生产和硫固定步骤中，P糊剂中的铅化合物（PbSO_（4）/ PbO）被转化为挥发性PbCl_（2），同时硫被固定为固体残留物，形式为CaSO_（4）消除硫氧化物的排放。最终步骤PbCl_（2）在真空下挥发，是遵循零级动力学模型的离子晶体的物理相变过程。成本估算表明，PbCl_（2）的利润为$ 8.50 / kg。该方法为废铅酸电池提供了一种新颖的绿色铅回收替代品，具有环境和经济效益。

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  • 来源
    《Environmental Science & Technology》 |2018年第4期|2235-2241|共7页
  • 作者

    Kang Liu; Jiakuan Yang; Sha Liang; Huijie Hou; Ye Chen; Junxiong Wang; Bingchuan Liu; Keke Xiao; Jingping Hu; Jin Wang;

  • 作者单位

    School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei 430074, China;

    School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei 430074, China,State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan, Hubei 430074, China;

    School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei 430074, China;

    School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei 430074, China;

    School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei 430074, China;

    School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei 430074, China;

    School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei 430074, China;

    School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei 430074, China;

    School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei 430074, China;

    Hubei Jinyang Metallurgical Incorporated, Co., Ltd., Xiangyang, Hubei 441000, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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