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Many minerals used in manufacturing processes need to be finely ground before they can be utilised in the preparation of the final product. Whitfield and Son Ltd offer a wide range of grinding media to enable cost effective reduction of the particle size of the materials. High Density AluminaA high aluimina 90% + Al2O3 (Alugrind) is isostatically pressed and sintered at high temperature to give a finished produc. Alugrind 90 has a density in excess of 3. 57gm / cm3 and is completely gas-tight. Isostatic pressing ensures that the density and hardness of the product is the same from the outside surface to the centre of the media and this ensures extremely low and uniform wear rates. High denisty alumina media is used to grind material where contamination must be kept to an absolute minimum, but because ofthe very high efficiency of Alugrind 90 + it SI fining increasing use in the productio of numerous materials from ceramic raw materials to colours, glazes and technical ceramics. Silica