Fluorine Vaporization and Leaching from Mg Slag Treated at Different Conditions

Abstract:

Both treatments and leaching tests of an Mg slag sample containing F of 2.15% from an Mg factory in northwest China were conducted in the present study, focusing on problems of F pollutions. By treating at 1000-1200°C in a muffle furnace, F leaching was decreased to a minimum level of 0.49-2.85 mg/l from the Mg slag with an original F leaching of 13.9 mg/l. The F leaching values increased to 4.83-95.5 mg/l, while treating the slag samples in a vacuum furnace. The treatments of Mg slag may thus be carried out in oxidizing atmosphere and under 1200°C to minimize fluorine pollutions and to improve environmental performances of the Pidgeon process.

• Periodical: Advanced Materials Research (Volumes 753-755)
• Pages: 88-94
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.753-755.88
• Online since: August 2013
• Authors: La Ner Wu, Feng Lan Han, Qi Xing Yang, Chun Du, An Jun Xu, Jian Li Li
• Keywords: FactSage, Fluorine, Leaching, Mg, Pidgeon Process, Pollution, Slag, Vaporization

References

[1] Hongxiang LIU et al.: Light Metals, 11, (2010), p.43 (in Chinese).

[2] Jindan Du et al.: Journal of Cleaner Production, 18, (2010), P. 112.

[3] RAMAKRISHNAN S et al.: [J]. Resources Conservation & Recycling, 24, (2004), p.49.

[4] Congyun Huang et al.: Cement Guide for New Epoch, No. 5 (2005) p.27 (in Chinese).

[5] Fenglan Han et al.: Advanced Materials Research Vols. 418-420 (2012) p.1657, Trans Tech Publications, Switzerland.

[6] Fenglan Han et al.: Advanced Materials Research; Nr 581–582 (2012) p.1044, Trans Tech Publications, Switzerland.

[7] Fenglan Han et al.: submitted to the 2nd International Conference on Energy and Environmental Protection (ICEEP 2013), Guilin, China, April 20-21, (2013).

[8] PRC test standard HJ/T299-2007, Solid waste-Extraction procedure for leaching toxicity- Sulphuric acid and nitric acid method, (2007) (in Chinese).

[9] PRC standards GB 5749-2006 for drinking water quality, (2006) (in Chinese).

[10] C.W. Bale et al.: CALPHAD 33 (2009), p.295.

[12] Ryo Inoue et al.: ISIJ International, Vol. 42, No. 7, (2002), p.785.

[13] Hongye He et al.: ISIJ International, Vol. 42, No. 7, (2002), p.794.