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Description:1. Product name: silicon tiny powder 2. Cenospheres Product name: cenosphere Features: 1) Cenosphere are hollow ceramic beads arising as a small proportion of the waste ashes from certain coal-burning power stations 2) When disposal of the waste ash by means of settlement pools, cenosphere are floating and gathering on the surface and are known as "floaters" 3) It's a type of light, and nonmetallic material 4) This material has excellent fluidity as well as sound, electric and heat insulation Chemical composition (%): SiO2>55 Al2O3>31 Fe2O3 <3 TiO2>1.1 MgO >1 CaO >2 K2O >1 loss <1 Physical properties: 1) Particle size: 200 - 500μm 2) Particle density: 0.4 - 0.8g/cm³ 3) Bulk density: 0.33 - 0.46g/ cm³ 4) Color: light gray / off white 5) Refractoriness: 1,200 - 1,470°C 6) LOI: 1.0% max. 7) Moisture content: 1.0% max. 8) Floater: 90% min. Packing: 25kg/bag Place of origin: China