Manufacturing of Silica Refractories from Locally Available Sand
Md. Tusar Ali1, Iqubal Hossain2, Md. Abdul Gaffer3

1Md. Tusar Ali, Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh.
2Iqubal Hossain, Bangladesh Institute of Marine Technology, Narayanganj, Bangladesh.
3Md. Abdul Gaffer, Bangladesh Institute of Marine Technology, Narayanganj, Bangladesh.
Manuscript received on February 05, 2017. | Revised Manuscript received on February 17, 2017. | Manuscript published on February 25, 2017. | PP: 1-4 | Volume-4 Issue-8, February 2017. | Retrieval Number: H1141024817
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Abstract: The investigation implies the use of silica sands, available in Bangladesh, as raw materials for silica bricks manufacturing and compare their properties with specification requirement in order to use these raw materials in manufacturing silica bricks to support the application in lining of induction furnaces and kilns, ladles in metallurgical industries and to replace the imported silica brick. This silica sands containing silica, alumina and excess amount of iron-oxide has been suitable for these bricks made by employing a simple hand mould pressing and sintering process. The production of silica refractory bricks from local sand have been remarkably changed by the addition of various amount of additives. The method for the preparation of these bricks has consisted of mixing the local sand with CaO (slurried lime). This lime acts as a binder and mineralizes in order to convert the free quartz to tridymite and crystobalite. The various properties of silica bricks are found to change with the addition of lime.
Keywords: Silica %, Refractory, Refractoriness and CaO (slurried lime).