Refractory Materials are usually non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 1,000 °F (811 K; 538 °C)。
Soda
Application：
widely used in manufacture of chemicals and metallurgy, medicine, petroleum, hides processing, textile, printing and dyeing, foodstuff, photograph, glass, enamel and paper industry, etc. as well as for purification of water.
Specific Property：
White powder or fine crystals.
Soda ash dense
Quality Index：
Total alkali content：99.2% min
Chlorides(NaCl)：0.7% max??
Sulphate(SO4)：0.03% max
Iron（Fe2O3)：0.004% max
Water insoluble matter：0.04% max?
Ignition loss：0.80% max
Bulk Density：0.9g/ml min??
Particle size l80μm Sieve Remaining：70.0% min
Soda ash light
Total alkali content：99.2% min
Chlorides(NaCl)：0.7% max
Iron（Fe2O3)：0.004% max
Water insoluble matter：0.04% max