The invention relates to a composite integral stopper for continuous casting tundish and a manufacturing method thereof, belonging to the technical field of metallurgical casting. The head of the stopper is made of magnesium oxide as aggregate, graphite, aluminum powder and silicon powder as fine powder, liquid and solid phenolic resin as binder and boron nitride as additive. The rod body of the stopper is made of sintered bauxite as aggregate, aluminum-magnesium spinel, sintered magnesia, high aluminum powder, silicon micropowder and aluminum micropowder as ingredients, and sodium tripolyphosphate, sodium hexametaphosphate and stainless steel fiber are added. The manufacture method of that stopper rod comprise the following steps: the rod body adopts a simultaneous mol process of a ladle cement-free castable and an inorganic pressing rod head, and is lightly burned into an integral stopper rod; From the rod body to the club head, the whole injection molding process is adopted while vibrating and pressing, and the kiln baking process of the non-oxidized, lightly burned isolation rod body and club head is also adopted. Its cost is low and its manufacturing method is simple.

Sovereignty terms

Claim 1, a composite integral stopper for continuous casting tundish, characterized in that the stopper head and stopper body are made of the following materials: (1), the stopper head is made of magnesia as aggregate, graphite, aluminum powder and silicon powder as fine powder, liquid and solid phenolic resin as binder, and BN as additive, and the proportion (weight%) is as follows. Graphite 13 ~ 16%, metallic aluminum powder 0.5 ~ 1.0%, metallic silicon powder 1.5 ~ 2.0%, BN 0.06 ~ 0.08%, liquid phenolic resin1~ 2. (2) The rod body is made of sintered bauxite as aggregate, alumina spinel, sintered magnesia, high aluminum powder, silica micropowder and aluminum micropowder as ingredients, and sodium tripolyphosphate, sodium hexametaphosphate and stainless steel fiber are added, and the proportion (weight%) is: sintered bauxite 65-75%, alumina spinel 8- 12% and sintered magnesia 65438. 2.0-2.5% of silicon micropowder, 0.5- 1.0% of aluminum micropowder, 0.04-0.06% of sodium tripolyphosphate, 0. 13-0. 17% of sodium hexametaphosphate and 0.8-1.