Foam light refractory casting material and preparation method thereof

Abstract

The invention discloses a foam light refractory casting material. The foam light refractory casting material consists of a refractory raw material, a combined raw material and an auxiliary raw material, wherein the raw materials are pulped to be mixed with special foam at a high speed, and the mixture is hardened to obtain the microporous light refractory material. The foam light refractory casting material does not utilize a light refractory raw material but directly adopts the heavy refractory raw material, so that the raw material is abundant and easily available and is flexible in preparation, the production cost of the casting material is only half to one third of that of an original light refractory casting material, and the casting material has the characteristic that the cost is lower when the volume weight of the material is lighter, which is contrary to the characteristic that the cost is higher when the volume weight is higher of the original light refractory casting material; and light materials with different volume weights, different strengths and different application temperatures can be designed by selecting different material formulas and adding different quantities of foam. The foam light refractory casting material can be used for making a heat preserving layer and an insulation layer of a stove as well as an inner fire retardant coating of the stove.

Description

technical field [0001] The invention designs a foam lightweight refractory castable and a preparation method thereof, belonging to the field of refractory materials. Background technique [0002] Refractory castables are granular and powdery materials made of refractory substances, and are composed of a certain amount of binder and water. It has high fluidity, is suitable for pouring construction, and is an unshaped refractory material that can be hardened without heating. It is composed of refractory aggregate, powder, binder, admixture, water or other liquid materials. Generally, it is poured, vibrated or tamped at the site of use, and it can also be made into prefabricated parts. [0003] Foamed concrete in the construction industry: the foaming material is mainly 325# or 425# ordinary cement, fly ash and other inorganic materials, which are mixed with mechanical foaming foam in a high-speed mixer, and the bulk density is 160-1200Kg / m 3 , cast-in-place is used for roof...

AI Technical Summary

Problems solved by technology

[0007] At present, the production methods of light-weight insulation bricks and light-weight refractory castables in the refractory industry mainly use heavy refractory raw materials, add combustible materials and press them with brick presses, and then burn them at high temperatures to form light-weight refractory bricks or light-weight refractory materials. High-quality refractory raw materials are melted and blown into light-weight raw materials, and then light-weight refractory raw materials are used to make light-weight refractory castables. This method has high production costs, requires high-temperature firing, and consumes a lot of energy. For example, light-weight castables prepared from natural light-weight raw materials The use temperature of castable is generally low, so it is difficult to make refractory lining

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