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- W4238585718 abstract "Willemite is typically found in oxidized zinc ores and metallurgical secondary resources but without effective extraction method yet. Based on the ideas of zinc phase reconstruction in the willemite, the extraction of zinc from willemite by calcified-roasting using CaO as additive and ammonia-leaching process was studied in this paper. The influences of CaO dosage, roasting temperature, roasting time on the phase transformation and zinc leaching rate were studied, which were characterized by XRD. The results indicated that Zn2SiO4 was transformed into ZnO or Zn2CaSi2O7. After roasted with 1.4 times of theoretical CaO dosage at l280 °Cfor 40 minutes, willemite was thoroughly transformed into ZnO. The zinc leaching rate of the roasted sample was 97.45% in NH4Cl-NH3-H2O leaching system, which increased by 91.40 % compared with zinc leaching rate of 6.05% when willemite was directly leached in NH4Cl-NH3·H2O system." @default.
- W4238585718 created "2022-05-12" @default.
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- W4238585718 date "2016-02-03" @default.
- W4238585718 modified "2023-09-26" @default.
- W4238585718 title "The Extraction of Zinc from Willemite by Calcified‐Roasting and Ammonia‐Leaching Process Based on Phase Reconstruction" @default.
- W4238585718 cites W1975834248 @default.
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- W4238585718 doi "https://doi.org/10.1002/9781119274643.ch14" @default.
- W4238585718 hasPublicationYear "2016" @default.
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