Abstract: The effect of poly hydroxyl saccharide(white granulated sugar and anhydrous glucose)content on the properties of magnesia-calcia dry material was introduced.The addition amount of poly hydroxyl saccharide is 3wt%、4wt%、5wt%、6wt%.The samples were formed through ramming vibration and sintered separately at the low temperature (150 ℃), middle temperature(1100 ℃) and high temperature(1550 ℃).The cold bending strength and compressive strength, volumedensity, linear change and porosity of samples were measured.Experimental results show that white granulated sugar and anhydrous glucose can be used as binder at 150 ℃.The linear change of white granulated sugar is fewer change at 1100 ℃ and 1550 ℃.Using poly hydroxyl saccharide produce less smoke.This method conform to the requirements of environmental protection.

Key words: tundish;magnesia-calcia;dry material;poly hydroxyl saccharide