Light weight castable refractory

Lightweight refractory is made of refractory light aggregate and powder, binder and admixture. General provisions: the volume density of less than 1800kg/m3 and refractoriness is not required, or
total porosity is more than 45%, at a specified temperature line shrinkage rate of less than 1.5% of the castable, is said for lightweight refractory castable.

Lightweight refractory is characterized by small volume density, low thermal conductivity, so it has good thermal insulation performance. The varieties of light refractory are more, generally according to the light aggregate variety, production method, bond type and performance level, etc… The most commonly used varieties of lightweight aggregate is divided into light sand brick, porous chamotte, hollow spheres, ceramic and expanded prelate lightweight refractory castable.

Energy shortage is the reality of the world today; saving energy is an important task of all countries. In this situation, the lightweight refractory casting material has been developed rapidly, the variety is expanded, the quality is improved and the output is increased. In the past, when the temperature is above 1000 DEG C Furnace in, lightweight refractory castable only as an insulation layer, it is difficult to directly contact with the flame. Now, about 1800 DEG C flame furnace with lightweight refractory castable can production and some can be used as the working lining.

In metallurgy, petroleum, chemical, electric power, building material, etc. industry kiln and thermotechnical equipment, lightweight refractory castable is frequently used, is generally the insulation layer, as well as the working layer or bearing component, good results were obtained. In contact with the molten metal or slag parts, only using tundish insulating board, and achieved good results.

The modulation principle of mud when using refractory bricks

Modulation for bricklaying refractory mortar shall comply with the following principles:

(1) before bricklaying to deal with all kinds of refractory mud of pre experiment and pre laying and determine the different mud bonding time, initial setting time, consistency and water;

(2) The modulation of different mud to use different apparatus, and timely cleaning;

(3) Different modulation to use clean water mud, water should be accurate weighing, to reconcile uniform, adjusted with the use. Has modulated the water is hard and hard and fast and hard mud and water use, has been the beginning of the mud cannot continue to use;

(4) Modulation phosphate bonded slurry to ensure that the provisions of the trapped material time and in tune with the, the slurry has a good modulation may not be any diluted with water. This kind of mud is corrosive and may not be in direct contact with the metal shell.