Fluoride emissions from Pidgeon process for magnesium production
Publikation: Forskning - peer-review › Konferensbidrag
Laner Wu ; Fenglan Han ; Qixing Yang ; Shengwei Guo
- School of Material Science & Engineering, Beifang University of Nationality, Yinchuan, Ningxia
649 KB, PDF-dokument
In the present study, experiments were performed by using retorts of pilot scale in a maffle furnace to simulate the Pidgeon process for primary Mg production. The test materials, briquettes of 5.6-10 kg made of dolime, ferrosilicon and fluorite, were charged in the retorts and heated under conditions similar to the industry operation. Fluoride minerals in the Mg slag from the simulation experiments were identified by XRD and SEM-EDS techniques. Quantities of some F-containing phases formed in the process under equilibrium condition were calculated by FactSage 6.2 thermodynamic package. Fluoride distributions were determined to establish an F-balance among the input and output materials. Besides, slag samples from a magnesium plant were also characterized, including leaching test according to EN 12457-2.
Based on these results, fluoride impacts on the environment were evaluated and discussed. Suggestions were also presented to minimize the environmental impacts from primary Mg production using the Pidgeon process.
|Status||Publicerad - mar 2012|
|Konferens||International Conference on Solid Waste Technology and Management|
|Period||11/03/2012 → 14/03/2012|
Evenemang (konferens etc.)
International Conference on Solid Waste Technology and Management
mar. 11 2012 - mar. 14 2012Philadelphia, USA
Evenemang (konferens etc.): Konferens