Abstract
Thermophosphate consists of the thermal treatment of the rock, with or without addition of other materials, being an excellent source of phosphate fertilizer, presenting other nutrients and beneficial elements such as Mg and Si. In this work were used Al-phosphates from Sapucaia (Bonito, State of Para) and slag of the blast furnace (Maraba, State of Para), in the ratio 80/20, being subjected to calcination at 700 oC and 1100 oC with the objective of verifying the behavior of crystalline phases in these temperatures. The samples were calcined and then characterized by X-ray diffraction (XRD). These analyzes showed that the phosphate ore consists of phases of the crandallite group and quartz and the slag by amorphous material. After calcination at 700°C, the phases of the thermophosphate and slag-thermophosphate are restructured tending to amorphous, except quartz. At this temperature, the solubility of the phosphate material favors the increase in P2O5 content. At 1100° C the identified crystalline phases were: aluminum oxide, aluminum and iron phosphates, calcium and iron phosphates, and silicon oxide. Studies evaluating these materials in agriculture may determine their agronomic efficiency.
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.
