Al（NO3）3对白云石烧结性能和抗水化性能的影响

doi:10.13228/j.boyuan.issn1006-6543.20160125

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Abstract The MgO-CaO was prepared by the two-step calcination method through adding Al（NO3）3 in natural dolomite. The effects of Al（NO3）3 addition on the sintering properties and hydration resistance of dolomite were studied. Results show that， the MgO-CaO sample has the sintered density of 3.17 g/cm3， apparent porosity of 4.9%， hydration resistance weight gain rate of 3.1%， pulverization rate of 20.1%， and the MgO grain size of 2.92 μm when sintered at 1 600 ℃ for 3 h. The Al（NO3）3 decomposes into Al2O3， and Al2O3 reacts with CaO to form 3CaO2·Al2O3 at high temperature， thus the liquid phase forms during sintering， and promoting the sintering process of the samples. When adding 0.30% Al（NO3）3 （mass percent）， the MgO-CaO sample has the sintered density of 3.24 g/cm3， apparent porosity of 3.8%， hydration resistance weight gain rate of 2.0%， pulverization rate of 15.6%， and the MgO grain size of 3.48 μm when sintered at 1 600 ℃ for 3 h.

Key words： Al(NO3)3 Dolomite Calcium magnesium materials The sintering performance hydration resistance

Received: 01 November 2016 Published: 22 December 2017

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	ZHANG Wang-Nian
	DENG Ning

Cite this article:

ZHANG Wang-Nian,DENG Ning. Effect of Al（NO3）3 addition on the sintering properties and hydration resistance of dolomite[J]. , 2017, 27(06): 39-43.

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http://edit.chinamet.cn/Jweb_fmyjgy/EN/10.13228/j.boyuan.issn1006-6543.20160125 OR http://edit.chinamet.cn/Jweb_fmyjgy/EN/Y2017/V27/I06/39

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