New development of spinel bonded chrome-free basic brick

Due to the water solubility in Magnesia-Chrome bricks, the hexavalent chromium ion (Cr 6+ ) has been reported for use of these bricks from rotary cement kilns. Therefore, there are being replaced with chrome-free brick mainly of magnesia-spinel type. So, the aim of the present study is to develop new Cr-free brick with the addition of TiO 2. All of properties such as bulk density, apparent porosity, cold crashing strength, modulus of rupture strength, hot modulus of rupture strength and refractoriness under load are measured on the basis of JIS standard. Also, the coating test and corrosion resistance were carried out against raw cement meal. Microstructural analysis and phase identification had done by scanning electron microscopy, which is equipped with an energy dispersive X-ray analysis (SEM/EDS), also, mineral phases present in the sample were determined by using X-Ray diffraction. According to the result spinel phases such as magnesia-aluminate and magnesia-titanate as a main phase formed as well as other lateral phases which have promoted the properties and microstructure.