Experimental study on LDHs composite inhibitor to coal resistance property

Zhang Xinhai; Ding Feng; Zhang Yutao; Li Yaqing

doi:10.13199/j.cnki.cst.2017.01.014

Abstract：In order to reduce the spontaneous combustion danger of Shenfu Coal,an in situ coprecipitation method was applied to prepare ZnMgA1-CO3-LDHs complex inhibitor.Then the inhibitor and a given percentage of the long flame coal from Shenfu Mining Area would be mechanically mixed to prepare the inhibition coal samples.A thermogravimetry/differential scanning calorimeter-Fourier transform infrared spectrometer combined technology were applied to analyze the inhibition coal samples.The analysis results showed that each feature temperature point of inhibition coal samples would be delay generally than the raw coal and the ignition point of the coal was increased on the TG curve.When the mixing quantity of the inhibitor reached to 20％ of the coal sample,the delay phenomenon would be obvious.The cxothcrm temperature would be increased from 135 ℃ to 560 ℃ and the peak area would be obviously reduced.Therefore,the ZnMgAl-CO3-LDHs complex inhibitor could absorb the heat in multi grade and could control the coal oxidation.The FTIR spectra showed that CO released volume from the coal samples added with the complex inhibitor would be reduced obviously,therefore,the complex inhibitor would have an obvious inhibition effect to Shenfu Coal.