Composite additive and refractory castable

Abstract

The invention discloses a composite additive and a refractory castable. The composite additive comprises the following components in percentage by weight: 20-60 percent of hydration reaction regulator, 20-50 percent of dispersing agent and 40-80 percent of matrix components. According to the composite additive, initial ion concentration of OH<-> regulated by the hydration reaction regulator is extremely low, so that a hydration reaction of calcium aluminate cement can be inhibited in a certain time, and the refractory castable keeps excellent liquidity in long enough time, i.e., enough working time is provided for construction operation. Moreover, after construction is ended, the ion concentration of OH<-> rapidly rises, so that the refractory castable is rapidly solidified and hardened, the maintenance time is shortened, the refractory castable has relatively high early strength, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a composite additive and a refractory castable using the composite additive. Background technique [0002] Compared with traditional fired refractory products, refractory castables have the advantages of excellent performance, convenient construction, low cost, reduced energy consumption, and environmental friendliness. They have become mainstream products in the refractory industry and are widely used in ferrous metallurgy, nonferrous metallurgy, cement Various high-temperature processes such as kilns, glass smelting, and ceramic firing. [0003] The construction performance of refractory castables is one of the important factors that determine its construction efficiency and high temperature performance. It not only directly determines the construction efficiency of refractory castables, but also has a huge impact on the physical and chemical indicators of materia...

AI Technical Summary

Problems solved by technology

However, this is often at the expense of greatly shortening the working time. In extreme cases, the castable begins to solidify before the pouring construction is completed, resulting in a huge waste of materials and forcing the extension of the construction period.

[0005] At present, there is a large difference between the working time and the setting time of refractory castables, which is not conducive to improving construction efficiency and early strength

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