... corrosion resistant, basic product raw materials, such as high alumina refractory materials, polishing, grinding, electroceramics devices and spark plugs ... bricks.2) Castable series. Low cement castable, High alumina castable, Silica castable, Corundum castable, Light weight insulation ... and Korea and import a several of bauxite, alumina, and iron ore as well from Brazil, Australia, India, and ...