Traspex is a moroccan company of production of sand silica which we want to market by contract annuel. Nous have a layer whose monthly production is of 20000T and whose characteristics are as follows: Composition chimique type. SiO2 sup. To: 97% Fe2O3 moy. : 0, 062% Al2O3 moy. : 1, 82% TiO2 moy. : 0, 02% CaO moy. : 0, 09% K2O moy. : 0, 06%