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https://doi.org/10.1016/0167-2738(93)90142-P

has been cited by the following article:

• TITLE: Mechanism of Pb Removal from Brass Scrap by Compound Separation Using Ca and NaF

  AUTHORS: Hidekazu Sueyoshi, Kousaku Yamada, Masashi Miyazaki, Takuya Okada, Nobuyuki Ashie, Yoshiharu Kousaka

  KEYWORDS: Lead Removal, Brass Scrap, Calcium, Sodium Fluoride, Compound Separation

  JOURNAL NAME: International Journal of Nonferrous Metallurgy, Vol.7 No.1, January 30, 2018

  ABSTRACT: The Mechanism of Pb removal from brass scrap by compound separation using Ca and NaF addition was investigated. Because large Ca-Pb compound particles formed by Ca addition rise to the surface of the molten brass, they can be skimmed off from the molten brass. However, fine Ca-Pb compound particles remain in the molten brass because of low buoyancy. By subsequent NaF addition, the reaction between Ca-Pb compound and NaF takes place at their contact regions, resulting in the formation of solid CaF2, liquid Pb and Na gas. Pb is mainly present at the Ca-Pb compound-CaF2 interface. CaF2 acts as a binder for aggregation of fine Ca-Pb compound particles, resulting in the formation of light and large composite compounds, which rise to the surface of the molten brass. A high Pb removal rate is achieved by skimming off.