Abstract—The magnesia-chrome brick which have long been used in the burning zone of rotary cement kilns but the considerable amount of water soluble, hexavalent chromium ion has been reported for used this bricks. So, magnesia-chrome bricks are being replaced with chrome-free brick mainly of magnesia -spinel type. Due to the progress with Cr-free lining, together with the reduction of cement production,such problems as instability of the cement coating, corrosion resistance of brick and, etc., wich affect the stability of kiln operation, and require further improvement. In this research, the positive effect of TiO₂ addition on the coating ability and corrosion resistance of basic brick is reported. Thus, 0, 2, 4, and 6 wt.%TiO₂ ratios were used in the blend(grain size distribution in the blend was 1-4mm, 0-1mm and <75 μm) and the optimum sintering temperature was about 1410℃. After the production of bricks, the coating test and corrosion resistance was carried out against raw meal cement. Microstructural analysis and phase identification were done by scanning electron microscopy with energy dispersive X-ray analyzer (SEM/EDS), also, mineral phases present in the samples were determined at room temperature by using X-Ray diffraction. The results indicated that the properties of the samples were positively affected by TiO₂ addition. So, according to experimental results showed coating and corrosion resistance with using TiO₂ were improved against raw cement meal.

Index Terms—Chrome-free brick, Coating, Corrosion, Magnesium-Titanate, Spinel.

Cite: S. Ghanbarnezhad, M. Bavand-Vandchali, A. Nemati and R. Naghizadeh, "Coating Ability and Corrosion Resistance of Basic Brick with TiO₂ for Rotary Cement Kilns", Journal of Medical and Bioengineering vol. 1, no. 1, pp. 63-66, 2012. doi: 10.12720/jomb.1.1.63-66