Investigation of the changes of P2O5 content of phosphate rock during simultaneous calcination/sulfation

✍ Scribed by Melike Sınırkaya; A. Kadir Özer; M. Sahin Gülaboglu

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 645 KB
• Volume: 211
• Category: Article
• ISSN: 0032-5910
• DOI: 10.1016/j.powtec.2011.03.036

✦ Synopsis

In this study, the changes of P 2 O 5 content of phosphate rock during simultaneous calcination/sulfation in a fluidized-bed were investigated. P 2 O 5 determination was carried out on samples with and without quenching of sulfated rock. The effects of the temperature and particle size on P 2 O 5 content of either sample were determined. It was found that the decrease in process temperature favorably increased the P 2 O 5 content of the sulfated samples. Since the calcination was the dominant reaction during the early stages of the process, there was an initial increase in P 2 O 5 content of the sulfated samples. However, at later stages, there was a decrease in P 2 O 5 extent of sulfated samples with an increase in the extent of CaSO 4 formed during the reaction. The P 2 O 5 extent, on the other hand, increased with decreasing particle size. The results showed that P 2 O 5 content of 23.27% in raw ore may be increased up to 36% following the quenching of sulfated samples.