Corrosion and adherence properties of cement clinker on porous periclase-spinel refractory aggregates with varying spinel content. Issue 6 (15th April 2017)

• Record Type: Journal Article
• Authors: Lin, Xiaoli; Yan, Wen; Ma, Sanbao; Chen, Qingjie; Li, Nan; Han, Bingqiang; Wei, Yaowu
• Is Part Of: Ceramics international. Volume 43:Issue 6(2017)
• Page Start: 4984
• Page End: 4991
• Publication Date: 2017-04-15
• Subjects: Porous periclase-spinel aggregates -- Lightweight refractories -- Cement clinker -- Corrosion -- Penetration -- Adherence property; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.01.005
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The corrosion and adherence properties of cement clinker on porous periclase-spinel refractory aggregates with varying spinel content were examined using a static crucible test and a sandwich test, respectively. The reaction characteristics of porous periclase-spinel aggregates and cement clinker and the effects of spinel content on the adherence property were investigated through scanning electron microscope (SEM), energy dispersive spectrometer (EDS), and FactSage ® thermo-chemical software. It was observed that the spinel content and pore characteristics strongly affected the corrosion results and thus affected the adherence ability of cement clinker on porous periclase-spinel aggregates. With an increase in the spinel content, the amount of glass phase formed from the reaction of the refractory and cement clinker increases because the rate of the spinel dissolution into the cement clinker is higher than that of periclase. The glass phase acts as a bridge between the cement clinker and the aggregate to enhance the adherence property, which depends on the amount, area distribution and viscosity of the glass phase and its penetration in aggregates. When the spinel content is 15–40 wt%, the refractory aggregate not only has a high cement clinker resistance but also a high adherence property. Once the spinel content exceeds 50 wt%, the skeletal structure of the aggregate will be destroyed, which will lead to a substantial decline in the cement clinker resistance.