Exploring mineral deposits in Palestine for potential use in manufacturing refractory ceramics

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Hussein, Saja
Khanfa, Noora
Walwil, Hanan
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Abstract: Refractories are materials that retain their strength and integrity at relatively high temperature. They are mainly oxide ceramics based on one or more of oxides like silica (SiO2), alumina (Al2O3), lime (CaO), Magnesia (MgO), zirconia (ZrO2) or their mixtures such as mullite , wollastonite , etc. Refractory ceramics are important for local manufacturing and construction industries. They are used in these industries for internal lining of melting furnaces and for insulation in many sectors of construction industry. This project aims to use the raw materials available in Palestine to create an investment project to support the Palestinian economy. The raw materials that we intend to explore and test their suitability are: various clay deposits, flint formations, whether in the veins, layers, or surface, the formation of dolomite in the southeast of the West Bank, and limestone (calcium carbonate) waste from local stone factories, as well as access to raw materials Containing silica. The project is the second type of refractory brick that does not contain clay and is mainly dependent on silica and calcium carbonate. A silica sample was brought from near Nablus and calcium carbonate was brought from the laboratory and quarries. During the first semester, a(1:1) ratio was mixed to form a refractory brick of calcium carbonate(CaCO3) and silica(SiO2), but the final result of a refractory brick sample was destroyed, given that the material brought in contained a small proportion of the silica , This was known through later tests on the sample. During the second semester, we used silica and calcium carbonate in a ratio of (1:1)& (1:2) silica powder and calcium carbonate were formed and the result of calculating at a ratio of (1:1) the rate was 3.7*〖10〗^(-2) 〖min〗^(-1) ⁡. As for silica with calcium carbonate in a ratio of (1:2),the rate was equal to 2.5*〖10〗^(-1) 〖min〗^(-1) refractory bricks were obtained from calcium carbonate and silica. The project goal has been achieved, we got two stones from refractory bricks, but it were weak and fragile , and it need additional materials to achieve both strength and toughness