LU Le-fu1,2, LI Xiao-yun3, ZHANG Hong-wei1,2, DOU Xing-xia1,2, GAI Guo-sheng4
(1. National Center for Quality Supervision and Testing for Fertilizers (Shandong), Linyi 276000, China;
2. Linyi Product Quality Supervision and Testing Institute, Linyi 276000, China;
3. School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China;
4. Key Laboratory of Advanced Materials sponsored by the Education Ministry of China, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China)
Abstract：The mechano-chemical effect of phosphorite was researched in the wet ultrafine grinding system. It was analyzed by characterization of particle size, specific surface area, X-ray diffraction, scanning electron microscope and element release at different grinding time were studied. Results indicate that wet grinding could reduce the particle size, increase the specific surface area, improve the surface area and increase the structural lattice disorder with increasing milling time. These changes contribute to dissolution of phosphorous, calcium and magnesium from phosphorite. The largest release amount of phosphorous, calcium and magnesium respectively reached 28.51g/kg, 24.65 g/kg and 10.04 g/kg during grinding for 25 h.
Keywords: phosphorite; mechanochemistry; superfine grinding; dissolution
ACTA MINERALOGICA SINICA Vol. 36, No. 3, 2016, Page 382-386
