Heating furnace heat storage box repairing material and preparation method thereof

Abstract

The invention discloses a repairing material for a heat storage box of a heating furnace and a preparation method of the repairing material. The repairing material comprises aggregate, auxiliary materials and a binding agent, the aggregate is prepared from the following components in percentage by weight: 70%-80% of regenerated heat accumulator powder, 5%-8% of silicon oxide micro powder, 5%-10% of power plant porcelain bottle micro powder, 5%-10% of alumina micro powder and 0.5%-2% of metal aluminum powder; the auxiliary material is zirconium-containing refractory fibers, and the addition amount of the auxiliary material in the repairing material is 0.1%-1%; the binding agent is added in the repairing material according to the following amounts: 0.5%-1.5% of resole, 2.5%-3% of aluminate coagulant, 1%-2% of silica gel expanding agent and 1%-2% of industrial tar. The repairing material can be made of waste materials, so that the utilization rate of the waste materials can be effectively increased; the wear-resistant and erosion-resistant thermal shock-resistant coating has good high-temperature adhesion, good wear-resistant and erosion-resistant performance and good durability, has the characteristics of wear resistance, scouring resistance, no falling and good thermal shock stability, prolongs the service life of the thermal shock-resistant coating, and reduces the maintenance cost.

Description

technical field [0001] The invention relates to a repairing material for a heating furnace, in particular to a repairing material for a heat storage box of a heating furnace and a preparation method thereof. Background technique [0002] During the use of steel rolling heating furnaces in iron and steel enterprises, the interior of the heat storage box belonging to the combustion system is subjected to the alternating action of cold and hot air and gas, and there will be different degrees of cold shrinkage cracks and cracks, which will seriously cause the heat storage box. The upper refractory material falls off, collapses, and even gas leaks and flames overflow, which leads to a low service life of the overall heat storage box and requires frequent maintenance, which seriously affects production efficiency. [0003] Generally, the heat storage tank cannot be repaired or temporarily repaired during routine maintenance. For temporary repairs, ordinary high-alumina refractory...

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Problems solved by technology

[0002] During the use of steel rolling heating furnaces in iron and steel enterprises, the interior of the heat storage box belonging to the combustion system is subjected to the alternating action of cold and hot air and gas, and there will be different degrees of cold shrinkage cracks and cracks, which will seriously cause the heat storage box. The upper part of the refractory falls off, collapses, and even gas leaks and flames overflow, resulting in a low service life of the overall heat storage box, requiring frequent maintenance, which seriously affects production efficiency

[0003] The heat storage tank is generally unable to be repaired or temporarily repaired during daily maintenance

For temporary repairs, ordinary high-alumina refractory clay or castables are often used for smearing; the adhesion of this smearing material is not good, resulting in a short service time after repairing, and flames will appear or overflow again, and even burn Damage to the external steel structure will cause the temperature in the heating furnace area to rise and the gas concentration to exceed the standard, causing safety hazards

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