High-self-opening-rate stuffing sand suitable for high-manganese steel continuous casting production and using method

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of high manganese steel continuous casting production, and in particular relates to a drainage sand suitable for high manganese steel continuous casting production with high self-opening rate and a use method. Background technique [0002] In the continuous casting production process, the level of automatic pouring rate is one of the restrictive links to realize ladle protection pouring. If the continuous casting ladle cannot be poured automatically, the operator must remove the long nozzle and use burning oxygen to drain the water. Wait for the steel flow to flush through the nozzle (open pouring), then close the steel flow to a small level, then put the long nozzle of the ladle, and open the large steel flow. pouring. According to the statistical data of daily production, the average pouring time of a single furnace with drainage and pouring is more than 3 minutes longer than that of automatic pouring. At...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of frequent drainage in the continuous casting process of high manganese steel, the present invention provides a drainage sand suitable for high manganese steel continuous casting production with high self-opening rate and its use method, thereby realizing the self-opening rate of high manganese steel continuous casting production process a substantial increase in