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2012 | 14 | 3 | 77-82
Article title

Temperature and moisture influence on the curing process of PAPR-type fertilizer products

Content
Title variants
Languages of publication
EN
Abstracts
EN
PAPRs (Partially Acidulated Phosphate Rocks) are the most prospective phosphate fertilizers, mainly through the use of the smaller amount of reagents and the ability to utilize low-grade phosphate rocks with a low content of P2O5. The aim of our studies was to investigate the temperature and moisture infl uence on the curing process of PAPR-type fertilizer products. Fertilizer preparations of a PAPR-type were obtained in the Atlas model-type apparatus (Syrris Ltd.). The curing temperature and the moisture content were controlled by the heating time of the reaction vessel and the degree of PAPR stoichiometric norm (ηPAPR). Our results indicate that increasing the curing temperature of the PAPR-type fertilizer product by 10oC can lead to a decrease in the moisture content of the fi nal product by an average value of 1.5% w/w. Additionally reducing the moisture content by 1% w/w may correspond to an increase in P2O5 content by an average value of 0.5% w/w.
Publisher

Year
Volume
14
Issue
3
Pages
77-82
Physical description
Dates
published
1 - 10 - 2012
received
accepted
online
31 - 10 - 2012
Contributors
author
  • Wrocław University of Technology, Faculty of Chemistry, Institute of Inorganic Technology and Mineral Fertilizers, ul. Smoluchowskiego 25, 50 372 Wrocław, Poland
  • Wrocław University of Technology, Faculty of Chemistry, Institute of Inorganic Technology and Mineral Fertilizers, ul. Smoluchowskiego 25, 50 372 Wrocław, Poland
  • Wrocław University of Technology, Faculty of Chemistry, Institute of Inorganic Technology and Mineral Fertilizers, ul. Smoluchowskiego 25, 50 372 Wrocław, Poland, jozef.hoffmann@pwr.wroc.pl
References
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  • 4. United States Geological Survey (2011). Mineral Commodity Summaries: Phosphate rock, Retrieved July 10, 2011, from http://minerals.usgs.gov/minerals/pubs/commodity/phosphate_ rock/.
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  • 10. Regulation (EC) No 2003/2003 of the European Parliament and of the Council of 13 October 2003 relating to fertilizers (Text with EEA relevance), Official Journal of the European Union, L 304, 122.
  • 11. Schultz, J.J. (1986). Sulfuric acid-based partially acidulated phosphate rock: Its production, cost, and use. Tech. Bull. IFDC-T-31. Muscle Shoals, USA, IFDC.
  • 12. Marshall, H.L. & Hill, W.L. (1940). Composition and Properties of Superphosphate Effect of Degree of Acidulation on the Curing Processes. Ind. Eng. Chem. 32(9), 1224-1232. DOI: 10.1021/ie50369a036.[Crossref]
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  • 14. Skut, J., Hoffmann, J. & Hoffmann, K. (2010). The prospects for partial acidulation of phosphorus raw materials by PAPR method in fertilizer manufacturing plants. Przem.Chem. 89(4), 534-539. (in Polish).
  • 15. Polish Committee for Standardization. (1984). Fertilizers - Methods used for measuring the physical properties of granular fertilizers - Sieve analysis. PN-C-87012-02-1984. Poland. (in Polish).
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_v10026-012-0088-z
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