Application of marble cutting powder mud in flue gas desulfurization
ZHANG Huan1,3, HU Tian-long1,3, LIU Hong-quan1,3, LIAO Lei1,3, QIN Ai-miao2
1. College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China; 2. College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China; 3. Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China
Abstract: Marble powder and limestone powder are respectively used as desulfurizers to prepare absorbents with ultra pure water, which are then used in simulating flue gas desulfurization experiment.Results show that the desulfurization efficiency by marble powder is always higher than that by limestone powder.The surface morphology, composition and structure of powder samples are analyzed by means of scanning electron microscopy, X-ray fluorescence spectrometry, X-ray powder diffraction, and particle size distribution instrument.It is found that marble powder has a smoother surface and its main crystal composition is calcite.The content of CaO in marble powder, which is the effective component to remove sulfur, is 6.571% higher than that in limestone powder.Under the condition of similar calcite content, the contents of insoluble components in marble powder such as dolomite, SiO2 and Al2O3 are lower than that in limestone powder.Marble powder has a more concentrated particle size distribution, and its average particle size is far lower than that of limestone powder.
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