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ZHANG Shengquan, ZHANG Maolin, WANG Sheng, KONG Fanfan, WANG Peng. Iron and zinc recovery of fine ash by cold pressed forming[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5249-5255. doi: 10.12030/j.cjee.201609171
Citation: ZHANG Shengquan, ZHANG Maolin, WANG Sheng, KONG Fanfan, WANG Peng. Iron and zinc recovery of fine ash by cold pressed forming[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5249-5255. doi: 10.12030/j.cjee.201609171
shu

Iron and zinc recovery of fine ash by cold pressed forming

  • 1.

    School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China

  • Received Date: 27/12/2016
    Accepted Date: 20/09/2016
    Available Online: 26/08/2017
    Fund Project:
  • In the situation of resource shortage and environmental protection, recycling the blast furnace (BF) fine ash is becoming important gradually. Content of elements, distribution, morphology and phase composition of the BF fine ash were confirmed by XRF, SEM, EDS and XRD. The TG-DSC analysis of the original BF fine ash and the BF fine ash added 5% of CaCO3 revealed that the lowest temperature of the BF fine ash cold-briquet was 950℃. The percentage of potato granule, water and different proportion of CaO acted as a composite adhesive was added to the BF fine ash for the forming of the cold-briquet. The strength of the cold-briquet was the largest when the proportion of CaO was 7%. Filling N2 as a protective atmosphere, the cold-briquet added a proportion 7% of CaO was roasted at 950, 1 050, 1 150, 1 250℃ for one hour in the tube furnace. After being roasted, the main material was iron when the temperature was 1 150℃. Zinc was removed. This technology not only adjust the basicity of BF fine ash, but also use the potato granule effectively.
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Iron and zinc recovery of fine ash by cold pressed forming

  • Received Date: 27/12/2016
  • Accepted Date: 20/09/2016
  • Available Online: 26/08/2017
Fund Project:

Abstract: In the situation of resource shortage and environmental protection, recycling the blast furnace (BF) fine ash is becoming important gradually. Content of elements, distribution, morphology and phase composition of the BF fine ash were confirmed by XRF, SEM, EDS and XRD. The TG-DSC analysis of the original BF fine ash and the BF fine ash added 5% of CaCO3 revealed that the lowest temperature of the BF fine ash cold-briquet was 950℃. The percentage of potato granule, water and different proportion of CaO acted as a composite adhesive was added to the BF fine ash for the forming of the cold-briquet. The strength of the cold-briquet was the largest when the proportion of CaO was 7%. Filling N2 as a protective atmosphere, the cold-briquet added a proportion 7% of CaO was roasted at 950, 1 050, 1 150, 1 250℃ for one hour in the tube furnace. After being roasted, the main material was iron when the temperature was 1 150℃. Zinc was removed. This technology not only adjust the basicity of BF fine ash, but also use the potato granule effectively.

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