Method for fabricating refractory material prefabricated member expansion joint

Abstract

The invention relates to a method for fabricating a refractory material prefabricated member expansion joint. The method includes the following steps that at normal temperature, a grouting agent and 'Christmas sprayed snow' are sequentially and uniformly sprayed on outer surfaces of a metal structural part and an anchoring part of a prefabricated member to form a buffer layer, and then still standing is performed; the metal structural part with a solid buffer layer is fixedly placed in a mold, and stirred pug of refractory castable is poured in the mold; and a solidified fire-resistant prefabricated member is subjected to normal temperature life-preserving to enter into a drying process of 300 DEG C to 400 DEG C, a part of the buffer layer on the outer surfaces of the metal structural part and the anchoring part is decomposed into gas to be discharged, the rest part of the buffer layer is melted, and the melted buffer layer permeates into the refractory material through pores of the refractory castable to form the expansion joint. The method for fabricating the refractory material prefabricated member expansion joint has the advantages that the method is suitable for various metal structural parts with complicated surfaces, and the problem that expansion cracks occur when prior fire-resistant prefabricated members are dried and used is solved.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a method for manufacturing expansion joints of refractory material prefabricated parts. Background technique [0002] Refractory prefabricated parts are a commonly used type of refractory material, which has the characteristics of convenient construction and replacement, energy saving, and excellent thermal shock stability. Generally, large and medium-sized prefabricated parts are equipped with steel structural parts (common steel, heat-resistant steel, etc.) in the middle of refractory materials due to overall strength and other reasons. The shape and quantity of steel structural parts are determined according to the shape of the prefabricated part. [0003] After the refractory prefabricated parts are poured and formed by vibration, after demoulding and necessary curing, they also need to go through a high-temperature drying process at 350-400 °C. It is well known that with...

AI Technical Summary

Problems solved by technology

However, due to the complex shape of the steel structure of large prefabricated parts, the irregular outer surface, and a large number of dense steel anchors, it is difficult to wrap the kraft paper firmly on the outer surface of the steel structure, and asphalt requires pre-heating , both troublesome and not safe, the effect is not good

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