Aluminum and magnesium low-weight castable used for steel ladle heat preservation

Abstract

The invention discloses an aluminium and magnesium low-weight castable used for steel ladle heat preservation. The aluminium and magnesium low-weight castable used for steel ladle heat preservation isprepared from a castable main ingredient, wherein the castable main ingredient is prepared from the following components in percentage by weight: 10-55% of one or two of fused white corundum and tabular alundum, 10-55% of alumina hollow balls, 1-8% of fused magnesia powder, 1-5% of sintered spinel particles, 1-8% of ultra-fine spinel micro powder, 2-8% of activated aluminium oxide powder, 3-7% ofcalcium aluminate cement and 0-2% of silica micro powder. According to the aluminium and magnesium low-weight castable used for steel ladle heat preservation, by strictly controlling the weight percentages of the components of the castable main ingredient, continuous particles are formed and stacked closely, and compaction of the castable is achieved, so that the castable has high normal temperature strength, thermal state high temperature strength and low thermal conductivity, and can adapt to a severe environment of a steel mill.

Description

technical field [0001] The invention relates to a casting material, in particular to an aluminum-magnesium lightweight casting material for ladle heat preservation. Background technique [0002] With the increasing requirements for energy saving and emission reduction, people pay more and more attention to the high-strength, high-temperature-resistant, and corrosion-resistant lightweight heat-insulating refractory materials that can be directly used on the working face. Refractory materials are microporous and lightweight. Under the condition of maintaining strength and slag erosion resistance, it can reduce structural thermal stress, improve thermal shock resistance, and reduce material thermal conductivity. Especially for working linings, it can significantly reduce heat loss. , to reduce energy consumption, and to a certain extent, reduce the resource consumption of refractory materials, so as to achieve the integration of high efficiency and longevity, energy saving and ...

AI Technical Summary

Problems solved by technology

This document mainly studies the effect of the amount of hollow spheres on the strength of the castable, but does not involve how to improve the thermal insulation performance of the castable