The invention belongs to the technical field of high-
manganese steel
continuous casting production, and particularly relates to high-self-opening-rate stuffing sand suitable for high-
manganese steel
continuous casting production and a using method. The stuffing sand comprises, by
mass, smaller than 25% of SiO2, smaller than 15% of Fe2O3, larger than 32% of Cr2O3, larger than 10% and smaller than 18% of Al2O3, larger than 8% of ZrO2, larger than or equal to 0.3% and smaller than or equal to 1.0% of
carbon black and smaller than or equal to 0.3% of H2O; and according to the
granularity of the stuffing sand, the proportion of 0.25 mm-1. 2mm is larger than 95%, and the proportion of the stuffing sand with the
granularity smaller than 0.25 mm is within 2%, and the proportion of the particle size of 1.2-1.5 mm is within 3%. According to the stuffing sand, the probability of the drainage phenomenon in the
continuous casting production process of the high
manganese steel is greatly reduced, and the cleanliness and stability of the steel are improved while efficient continuous
casting production of the stuffing sand is achieved. In addition, the using method is improved, so that the
occurrence probability of
molten steel permeation and the use cost of the special stuffing sand are further reduced.