Ladle working lining brick and preparation method thereof

Abstract

The invention relates to a ladle working lining brick and a preparation method thereof. The technical scheme is: stir 40~60wt% high alumina bauxite particles, 20~40wt% sintered magnesia particles, 0.1~2wt% organic additives and 5~20wt% absolute ethanol, dry, sieve points to obtain pretreated particles with a particle size of 1-5 mm. Then the flaky graphite of 20~40wt%, the silicon carbide fine powder of 20~40wt%, the antioxidant of 10~20wt%, the high alumina fine powder of 10~20wt% and the tensio-active agent of 2~10wt% are stirred, That is the pretreatment powder. Then 30~50wt% of the pretreatment granules, 30~50wt% of the pretreatment powder, 10~20wt% of corundum particles and 3~5wt% of thermosetting phenolic resin are mixed evenly, pressed and molded, and cured to obtain Lining bricks for ladle work. The invention has the characteristics of low production cost, simple process and easy industrial production, and the prepared ladle working lining brick has high high-temperature flexural strength and good slag erosion resistance.

Description

technical field [0001] The invention belongs to the technical field of ladle lining. In particular, it relates to a ladle working lining brick and a preparation method thereof. Background technique [0002] At present, some large iron and steel companies integrate the functions of molten iron receiving, transportation, storage, molten iron pretreatment, converter iron mixing and molten iron insulation into the ladle, and the molten iron from the blast furnace goes through the necessary process without replacing the ladle. The production organization model is directly blended into the converter for smelting, that is, the "one package to the end" molten iron transportation technology. Although this technology has many advantages, it has some negative effects on refractory materials: the complexity of production conditions makes the ladle working lining refractory materials more likely to be damaged and the service life is shortened; A large amount of lime and fluorite etc. i...

AI Technical Summary

Problems solved by technology

[0004] The patented technology of "MgO-SiC-C working lining brick and its preparation method for ladle making of molten iron" (201610955000.6) introduces magnesia into the raw material to avoid accelerated erosion or even iron inclusion due to excessive brick joints, and uses square magnesium Stone has the advantage of good resistance to alkaline slag, which improves the service life of the slag line, but still needs to be further improved in terms of high temperature flexural strength of the product

"Pyrophyllite-Silicon Carbide Carbon Bricks for Ladle and Its Preparation Method" (201110206980.7) patented technology, using pyrophyllite and silicon carbide as main raw materials to produce non-fired ladle lining bricks, with low cost of the entire product , good economic benefits, less consumption of refractory materials per ton of iron, etc., but still need to be further improved in terms of slag erosion resistance of the product

[0005] Although the existing technology has adjusted the structure and performance of the ladle lining bricks by means of raw material systems and additives, it is still unable to optimize the performance of the material in terms of oxidation resistance, spalling resistance, and erosion resistance.