on 14/3/2018, Ph.D. thesis titled

“Production of refractoriness from local materials and improving their properties for use in applications with high temperatures “,

presented by student Ehab Fathi Ayoub, had been discussed.  The members of discussion’s committee are listed below

Thesis discussed possibility of extracted Alumina from Iraq Kaolin, Dweikhala position/ Anbar.  Kaolin rocks had crashed and milling to get less than 325 µm, before firing at 650 °C for 90 minute to remove organic and crystalline water. Then Kaolin powder had been treated with hydrochloride for 2 hours to separate silica by nomination from Alumina, after that the powder had rinse for 2 to 5 period, final step include deposition Alumina hydroxide which could be converted to Alumina by heat treated. This process produce Alumina hydroxide with high purity, more than 98%. The second part of thesis discussion using extracted alumina to produce refractory bricks, where mixing with Kaolin, and investigation characteristic of the produced bricks. The investigated properties include density, apparent porosity, water adsorption, compression strength and X-ray diffraction. The results show decreasing apparent density with increasing alumina content, increasing water adsorption with increasing alumina content.

This thesis had been scientific evaluation by assistance Prof Dr.  Shaker Jaheal  Idreas/ Babylon University / materials’ engineering collage. And linguistically by  Assistant Prof Dr. Omar Faroke Lutfiy / university of technology/  control and systems engineering department. The discussion of the thesis had been performed at the building C, and the discussion’s committee agreed to award the student Ph.D. degree.