Low-heat conductivity refractory energy-saving castable and preparation method thereof

Abstract

The invention discloses a low-heat conductivity refractory energy-saving castable and a preparation method thereof. The castable is prepared from the following components in parts by mass: 50 to 55 parts of 1mm-8mm light forsterite, 5 to 10 parts of raw perlite, 10 to 25 parts of 1mm-0mm light bonite, 5 to 10 parts of 220-mesh light pyrophyllite powder, 5 to 10 parts of 325-mesh light fine mullite powder, 5 to 10 parts of silica powder, 5 to 10 parts of Al2O3 micropowder with the grain size of 2Mu m to 3Mu m, 3 to 8 parts of aluminate cement, 5 to 10 parts of 0.25mm-1.5mm vitrified microbubbles, 0.31 parts of sodium hexametaphosphate and 0.3 parts of explosion-proof fibers. The low-heat conductivity refractory energy-saving castable disclosed by the invention is prepared by the steps of uniform mixing, vibratory shaping, curing and roasting, and has the characteristics of light weight, high strength, low heat conductivity coefficient, high temperature resistance, low water absorption and good compactness.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a refractory and energy-saving castable with low thermal conductivity and a preparation method thereof. Background technique [0002] In blast furnaces, hot blast stove pipes, etc., in order to ensure the temperature of high-temperature gas during transportation, refractory materials must be built in the pipes. In the use of high-temperature kilns, in order to ensure the thermal insulation effect of the kiln and improve the service life of the kiln lining, a combination of heavy bricks and light refractory materials is often used to build the kiln lining, resulting in a large heat capacity and reduced thermal efficiency of the kiln lining. Because traditional lightweight energy-saving materials have the defects of large porosity, high water absorption, relatively low strength, and poor thermal insulation and energy-saving effects, they cannot be directly used in the ...

AI Technical Summary

Problems solved by technology

In the use of high-temperature kilns, in order to ensure the thermal insulation effect of the kiln and improve the service life of the kiln lining, a combination of heavy bricks and light refractory materials is often used to build the kiln lining, resulting in a large heat capacity and reduced thermal efficiency of the kiln lining.

Because traditional lightweight energy-saving materials have the defects of large porosity, high water absorption, relatively low strength, and poor thermal insulation and energy-saving effects, they cannot be directly used in the working layer, and must be built with multi-layer refractory materials, which also increases the diameter of the pipe. This results in increased equipment weight and volume, increased material consumption and cost