Research Progress of Desulphurization Methods for Scrap Lead Paste

Cheng, Gong; Zhang, Xiaofei; Hu, Qihui; Cheng, Yu Yen; Fang, Mingxue; Zhang, Hui; Chen, Qun; Lei, Lixu

doi:10.18488/journal.64/2015.3.3/64.3.58.64

Cited by 2 publications

(1 citation statement)

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“…Some smelters also feed small amounts of lead paste (generally less than 20%) together with galena concentrate in primary smelting (Zhang, 2013). The pyrometallurgical recycling of LABs includes smelting after pre-desulfurization (Gong et al, 2015) at low temperatures or direct smelting of lead paste without desulfurization at temperatures above 1000°C (Jeong and Kim, 2017). However, these technologies do not focus on the recovery of sulfur; sulfur dissolves into the crude metal during the desulfurization process and reacts to form gaseous SO2 during smelting.…”

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confidence: 99%

Novel recycling process for lead-acid battery paste without SO2 generation - Reaction mechanism and industrial pilot campaign

Yang

Taskinen

et al. 2019

Journal of Cleaner Production

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This study proposes an innovative and environment-friendly method for recycling spent lead-acid batteries without SO2 generation. Iron-containing waste was employed as a sulfur-fixing agent to retain sulfur as ferrous matte, which eliminated the generation and emissions of gaseous SO2. This work investigated the thermodynamic and experimental feasibility and conversion mechanism of the method, and evaluated its industrial applicability. A bench-scale test showed direct recoveries of 93.5 % and 97.7% in crude lead and ferrous matte for lead and sulfur, respectively. The phase transformation mechanism study indicated that metallic lead from the lead paste was extracted mainly through the sequence of PbSO4 / → PbS 3 4 → PbO / → . Sulfur in PbSO4 was thus first transferred to PbS and finally fixed as FeS. An industrial-scale pilot campaign was also conducted to confirm the feasibility and reliability of the new process.

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Section: / 24mentioning

confidence: 99%