Heating furnace mending material and preparation method thereof

Abstract

The invention relates to a heating furnace mending material and a preparation method thereof in the field of refractory materials. The heating furnace mending material is prepared by uniformly mixing 2 to 20 weight percent of sodium silicate and/or sodium metasilicate serving as a bonding agent, 97 to 80 weight percent of corundum, bauxite or mullite serving as a main raw material, and 0.5 to 8 weight percent of silica micropowder, alumina micropowder or bauxite micropowder serving as a sintering aid. The mending material has the advantages that: 1, the addition of water is avoided, namely, the mending material can be used for dry mending, so the influence of factors, such as maintenance, baking and the like, on the performance of the mending material is avoided; 2, the mending is simple and convenient to construct without stopping a furnace, namely, the mending material can be spread for furnace mending at normal temperature and thrown for the furnace mending at high temperature; 3, the mending material does not produce any harmful gas in the mending so as to meet the requirement of environmental protection; 4, the mending material has a wide curing and sintering temperature range, and can be quickly cured and sintered at 150 to 1,200 DEG C; 5, the mending material has relatively higher cohesiveness with an original furnace lining material, and does not produce layering after the mending; and 6, the mending material has slag resistance, abrasive resistance and high thermal shock resistance, and the furnace has long service life after being mended.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a heating furnace repair material and a preparation method thereof. Background technique [0002] The heating furnace is the key equipment before the billet is hot rolled. During the operation of the heating furnace, the lining materials such as furnace bottom refractory materials are continuously melted and peeled off by slag erosion, billet wear, and thermal shock damage, resulting in pits or continuous thinning of the furnace bottom. When the pits are serious, the steel billet will be deformed during the heating process, which will affect the quality of hot rolling or steel pipe passing; the thinning of the furnace bottom will affect the service life of the heating furnace. In addition, during the operation of the heating furnace, there will be a phenomenon that the steel billet sticks out of the refractory material at the bottom of the furnace, so that the material is par...

AI Technical Summary

Problems solved by technology

Asphalt and resin produce harmful gas during repair, which is harmful to the human body and pollutes the environment; moreover, the repair material is carbon-bonded, and carbon oxidation in the oxidizing atmosphere leads to structural damage and reduced ma