Forsterite light brick and preparation method thereof

Abstract

The invention relates to a forsterite light brick and a preparation method thereof. The method adopts the following technical scheme: mixing 60 to 95 weight percent of forsterite raw material and 5 to 40 weight percent of magnesium oxide; adding 25 to 45 weight percent of water, 0.05 to 0.5 weight percent of bonding agent, 0.1 to 0.5 weight percent of water reducer and 0 to 0.5 weight percent of mineralizer and uniformly mixing the mixture; adding foam made of 0.5 to 2 weight percent of foaming agent into the mixture; casting the mixture after uniformly stirring; naturally drying the mixture; baking the mixture at low temperature; and sintering the mixture at the temperature of between 1,300 and 1,550 DEG C, and preserving the heat for 2.5 to 12 hours. The forsterite light brick prepared by the invention has excellent compression strength, lower volume density and heat conductivity, and can be used in production of furnace construction insulating materials in steel, ceramic and other industries after being subjected to heat treatment at the temperature of between 1,300 and 1,550 DEG C; and the used forsterite raw material is forsterite tailings with few utilization value at present, which not only reduces production cost, but also can realize good economic and social benefit.

Description

technical field [0001] The invention belongs to the technical field of lightweight bricks, and in particular relates to a forsterite lightweight brick and a preparation method thereof. Background technique [0002] Energy conservation is one of the important measures to maintain sustainable economic development, and thermal insulation is one of the important measures for energy conservation. Therefore, lightweight thermal insulation materials with micro-nano pores play an important role in the field of thermal insulation. High-quality lightweight refractory products require good high-temperature performance, high strength at room temperature, low thermal conductivity, and good thermal insulation performance; thus, higher requirements are put forward for the preparation method of lightweight materials. [0003] Forsterite lightweight thermal insulation material has a series of advantages such as high compressive strength, low bulk density, good thermal insulation performance...

AI Technical Summary

Problems solved by technology

A light material with high thermal resistance forsterite and its preparation method, 200910060875.X) The main defects of this series of methods are as follows: (1) the production process is complex and requires multiple processes to complete; (2) the pores of the product are not uniform And most of the formed pores are open pores, which will affect the heat insulation effect of the product; (3) soaking in water will cause a serious waste of water resources and increase production costs; (4) the chlorine gas produced in the firing process will directly enter the air and will pollute environment; (4) It is difficult to wash the residual chloride after soaking, and the melting point of chloride is low, which will seriously affect the high temperature performance of the product

Or forsterite light materials prepared by other methods either have a higher bulk density or a lower use temperature