Refractory casting material for ladle splash guard and preparation method of refractory casting material

Abstract

The invention relates to a refractory casting material for a ladle splash guard and a preparation method of the refractory casting material. According to the technical scheme, the refractory casting material is prepared by taking 61-71wt% of ferrochrome slag as aggregate, 11-16wt% of fine ferrochrome slag powder, 13-18wt% of fine powder of Cr7-C3, 1-4wt% of zirconia micro powder and 2-5 wt% of crystalline flake graphite micro powder as matrix materials, firstly, uniformly mixing the matrices, adding the uniformly mixed matrix materials into the aggregate, and mixing, thereby obtaining a mixed material; subsequently, adding silica sol which accounts for 3-7wt% of the mixed material, stirring, molding, and maintaining for 12-24 hours at the room temperature; finally, keeping the temperature for 12-24 hours at 90-110 DEG C, thereby preparing the refractory casting material for the ladle splash guard. The preparation method has the characteristics of low cost and simple process, and the refractory casting material for the ladle splash guard is high in density, good in volume stability and high in anti-molten iron / slag corrosion.

Description

technical field

[0001] The invention belongs to the technical field of castables for ladles. In particular, it relates to a refractory castable for a ladle splash guard and a preparation method thereof. Background technique

[0002] With the development of iron and steel smelting technology, "three removals" (desulfurization, dephosphorization, and desiliconization) pretreatment and impurity removal have become an important link in the molten iron smelting process. The "three removal" pretreatment of molten iron is generally carried out in molten iron ladle or torpedo tank car, but the impurity removal reaction of molten iron pretreatment is intense, and the smoke is thick, resulting in violent splashing of molten iron. The ladle must be closed with a splash guard. Therefore, the splash guard of the ladle needs to withstand the hot smoke erosion, temperature fluctuation and erosion of molten iron / slag during the "three removal" pretreatment process of impurity removal. ...