Effects of Microcrystalline Grinding on Physical Characteristics and Element Release in K-Feldspar Rocks

Abstract:

The K-feldspar rocks, mechanically activated by a microcrystalline mill with an organic activator, were used to study their physical properties and kinetics of element release. The results showed that the microcrystalline grinding reduced particle size, significantly increased specific surface area, obviously improved the morphologies, and broke the lattice structure and increased abundance of amorphous and disordered constituents in K-feldspar rocks within 45 minutes of grinding. Further grinding beyond 45 minutes resulted in an undesirable effect. The microcrystalline grinding also improved release amount of K, Na, Si, Al, Fe and P, and increased the value of pH and EC in extracting solution. Among the grinding treatments, the best physicochemical properties were obtained at 45 minutes and the energy consumption was lower. In comparison to the ordinary K-feldspar rocks, the physical characteristics of the activated K-feldspar rocks were changed significantly. These changes enhanced the nutrient release from the K-feldspar rocks. Thus, microcrystalline grinding technology was important to exploit and utilize the K-feldspar rocks.

• Periodical: Advanced Materials Research (Volume 826)
• Pages: 175-182
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.826.175
• Online since: November 2013
• Authors: Le Fu Lv*, Guo Sheng Gai, Chun Sheng Liu, Yu Fen Yang, Zhen Quan He, Wan Cai Li, Xian Mei Zhang
• Keywords: Element Release, K-Feldspar Rocks, Mechanical Activation, Microcrystalline Grinding

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