Ladle castable for smelting of high manganese steel, and preparation method of ladle castable

Abstract

The invention relates to a ladle castable for smelting of high manganese steel, and a preparation method of the ladle castable. The ladle castable is characterized in that 43-68 wt% of microporous corundum particles and 10-27 wt% of magnesium aluminate spinel particles are taken as aggregate, 5-15 wt% of microporous corundum fine powder, 2-4 wt% of magnesium aluminate spinel micro-powder, 4-8 wt%of pseudo-boehmite, 2-4 wt% of rhop-Al2O3 fine powder, 0.1-1 wt% of monoclinic phase zirconia fine powder and 0.1-1.5 wt% of manganese powder are used as matrix, and the aggregate and the matrix are taken as raw materials; organic fibers with an amount being 0.04-0.08wt% of the weight of the raw materials, a polycarboxylic acid water reducer with an amount being 0.1-0.5wt% of the weight of the rawmaterials, maleic acid with an amount being 0.2-0.5wt% of the weight of the raw materials and a defoaming agent with an amount being 0.01-0.03wt% of the weight of the raw materials are taken as additives. The preparation method comprises the steps of mixing the matrix, the additives and water to obtain a premix; spreading the aggregate into a mould, then pouring the premix into the mould, molding, drying, and demoulding to obtain the ladle castable for the smelting of the high manganese steel. The ladle castable is high in strength, good in thermal shock resistance, scouring-resistant and excellent in steel slag erosion resistance, and can improve the quality of the high manganese steel.

Description

technical field [0001] The invention belongs to the technical field of ladle castables. In particular, it relates to a ladle castable for smelting high manganese steel and a preparation method thereof. Background technique [0002] Since the early 19th century, scientists have studied the application of manganese in steel, and then people found that manganese in steel can not only increase the hardness of steel, but also ensure that the ductility and toughness of steel do not decrease. Low-manganese steel with a manganese content of less than 3% has poor toughness. When the manganese content in the steel is greater than 13%, the strength and toughness of the steel increase. In the early days, 11% to 14% manganese steel was mainly used in military fields such as helmets, armored tanks, and armor-piercing projectile warheads. Today, high-manganese steel has been widely used in metallurgy, mining, building materials, automobiles, agricultural machinery, military industries and...

AI Technical Summary

Problems solved by technology

In addition, under the erosion of molten steel, refractory materials are easy to peel off and damage, which reduces the service life of refractory materials and affects the cleanliness of molten steel.

The current ladle refractory material corrodes quickly during the smelting process of high manganese steel, and it is not good for the control of elements in the steel, which restricts the production of high manganese steel