Research on a new type of environmentally-friendly,carbon-free and dry refractory for tundish and its application
A new environmentally-friendly,carbon-free and dry refractory was developed by replacing phenolic resin with a new type of carbon-free binder,and the effect of the amount of carbon-free binder on the performance of the dry refractory is studied.The results show that the dry refractory achieved a good comprehensive performance when the addition amount of metasilicate was 8%.The introduction of olive sand can effectively reduce the thermal expansion and sintering properties of dry refractory,but its slag resistance is slightly worse than that of magnesium materials.The developed environmentally-friendly,carbon-free,and dry refractory can meet the requirements of casting ultra-low carbon steel in steel plants,without increasing carbon content in the liquid steel.Its environmentally friendly feature compensates for the shortcomings of resin bonded dry refractory in terms of low-carbon production and environmental protection.
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