Self-hardening tundish working lining material, and preparation method and construction method thereof

Abstract

The invention relates to a self-hardening tundish working lining material, and a preparation method and a construction method thereof. The tundish working lining material comprises the following components, by weight: 90-93% of an aggregate of no more than 5mm and comprising magnesia and forsterite sand, 4-7% of a binder, 0.4-1% of an additive, and 1-3% of a micro powder no more than 0.074mm, wherein a total weight of the above components is 100%. The preparation method comprises the steps of: first crushing the raw materials, proportioning and stirring uniformly according to the above proportion ( except the binder and the additive), and conducting bulk packaging; and packaging and distributing the binder and the additive according to the above proportion. The construction method is as below: stirring quickly to mix the binder, the additive and materials in bulk packing according to the above proportion with a continuous mixer; continuously adding the mixture between a tundish mold tire outer wall and the permanent lining, and vibrating compactly; and standing at room temperature for 0.5-5 h, and releasing the mold to obtain the self-hardening tundish working lining material. The self-hardening tundish working lining material does not need to be baked, consumes low energy, and emits little CO2.

Description

technical field [0001] The invention relates to an unshaped refractory material in the field of tundish refractory materials, in particular to a self-hardening tundish working lining and a preparation and construction method thereof. Background technique [0002] With the continuous development of society, human society pays more and more attention to saving resources, protecting the environment, reducing costs and improving efficiency. In recent years, with the rapid development of continuous casting steelmaking technology, the technical requirements for tundish working lining are getting higher and higher. However, at present, in the iron and steel metallurgical industry, a large amount of gas energy is required during continuous casting and subcontracting production, resulting in excessive energy consumption and CO 2 The emission is large, the production cost of continuous casting remains high, and the environment is difficult to improve. Therefore, to reduce the energy...

AI Technical Summary

Problems solved by technology

[0009] Regardless of whether the tundish working lining in the above-mentioned disclosed patents uses smear or dry materials, whether it uses inorganic salts, organic salts or other types of binders, and the construction methods are smearing, pounding, vibration, etc., it must go through a long period of time. time baking