Abstract
Gallium (Ga) is an important strategic metal widely used in the semiconductor manufacturing industry. In this paper, a new vacuum chlorination and water leaching process for simultaneous P fixation and Ga, Pb, and Zn separation from phosphorus flue dust (PFD) using CaCl2 as reagent was proposed. The principle of metal volatilization in vacuum was clarified and the reaction mechanism of chlorination was studied. The impacts of the experimental parameters on the metals volatilization rate were assessed. Under the optimal conditions, Ga volatilization rate reached 97.44 %, the volatilization rates of Pb and Zn respectively reached 98.11 %, and 98.56 % and were highly enriched in the condensation zone, while most of P was converted into water-insoluble Ca2P2O7 and remained in the residue. In addition, the impacts of several factors in the water leaching process on the removal of Cl from the residue were studied. Finally, the leaching solution mainly containing Cl-, K+, and Ca2+ and the water leaching residue with P content of 19.21 % were obtained. This process provides a new clean and sustainable method for the recovery of valuable components in PFD, without the generation of hazardous substances, and therefore it has potential application value.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
