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Chlorination Roasting of Oxidized Component Obtained from Dross at a Temperature of 1000°C

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Metallurgist Aims and scope

Work is devoted to solution of the problem of processing dross obtained as a result of hot galvanizing of products, in particular, waste-free utilization of its oxidized component by chlorination firing using cheap chlorine-containing CaCl2 and NH4Cl reagents. Results of chlorination roasting of the dross oxidized component together with CaCl2 and NH4Cl at a 1000°C are presented. The effect of CaCl2 and NH4Cl consumption on lead and iron sublimation from the dross oxidized component in the form of chlorides is studied. It is found that use of CaCl2 with a consumption equal to 6% of the weight of the oxidized component provides thorough purification of the starting material from Pb, Cu, Ni, Cd. Maximum reduction of the iron content is not possible. It is shown that use of NH4Cl with a consumption of 15% of the weight of the oxidized component provides thorough removal of impurity metals and metallic zinc from the source material. It is found that with a firing temperature of 1000°C thorough sublimation of impurities is achieved, which ensures production of pure zinc oxide, suitable for use as a mineral additive in animal and bird feed. The content of metal impurities in the resulting zinc oxide is, wt.%: Pb 0.02, Fe 0.08, Ni 0.02, Cu 0.008, Cd 0.001. Optimum firing parameters are established: T = 1000°C, duration 60 min, air flow 0.1 liter/min, CaCl2 consumption 6%, and NH4Cl 15% of the weight of the oxidized component.

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Authors and Affiliations

  1. Satbaev University, Almaty, Kazakhstan

    N. K. Dosmukhamedov, E. E. Zholdasbai, G. M. Koishina, A. V. Kaplan, M. B. Kurmanseitov & E. B. Tazhiev

  2. Arvak Tech. LLC, Rehovot, Israel

    N. K. Dosmukhamedov, E. E. Zholdasbai, G. M. Koishina, A. V. Kaplan, M. B. Kurmanseitov & E. B. Tazhiev

Authors
  1. N. K. Dosmukhamedov
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  2. E. E. Zholdasbai
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  3. G. M. Koishina
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  4. A. V. Kaplan
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  5. M. B. Kurmanseitov
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  6. E. B. Tazhiev
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Correspondence to N. K. Dosmukhamedov.

Additional information

Translated from Metallurg, Vol. 66, No. 3, pp. 85–91, March, 2022. Russian DOI https://doi.org/10.52351/00260827_2022_03_85.

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Dosmukhamedov, N.K., Zholdasbai, E.E., Koishina, G.M. et al. Chlorination Roasting of Oxidized Component Obtained from Dross at a Temperature of 1000°C. Metallurgist 66, 335–342 (2022). https://doi.org/10.1007/s11015-022-01333-y

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  • DOI: https://doi.org/10.1007/s11015-022-01333-y

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