Construction method for patching of refractory materials of furnace top of heating furnace

Abstract

The invention discloses a construction method for patching of refractory materials of a furnace top of a heating furnace. The construction method belongs to the technical field of metallurgical production equipment, and is low in investment cost. Service life is long after construction is completed. The construction method for patching includes steps of stopping the furnace and reducing the temperature of the furnace to be lower than 45 Celsius degree; erecting furnace top supporting frames: erecting the furnace top supporting frames in areas, which are required to be repaired, of the furnace top in the furnace, and supporting the furnace top firmly; digging repair slope surfaces: digging away refractory materials of the furnace top required to be repaired due to cracking and dropping, and forming the repair slope surfaces on peripheries of the repaired areas; erecting mold plates: erecting the pouring mold plates under the furnace top after the refractory materials of the furnace top are dug away and the repair slope surfaces are formed, and forming repaired spaces; pouring and maintaining refractory pouring materials: pouring the refractory pouring materials which are mixed and qualified in the repaired spaces and maintaining the refractory pouring materials for three days at least; and removing the mold plates: removing the pouring mold plates and the various supporting frames and recovering production.

Description

technical field [0001] The invention relates to a construction method, in particular to a construction method for digging and repairing refractory materials on the roof of a heating furnace, and belongs to the technical field of metallurgical production equipment maintenance. Background technique [0002] The heating furnace is a thermal equipment used to reheat the blooming slab such as slab, steel slab or continuous casting slab to the temperature required for hot rolling. In order to reduce energy consumption and reduce the weight of the furnace lining structure. The roof of the heating furnace generally adopts a flat-top hanging light-weight high-strength composite structure, that is, the working lining of the furnace roof is made of heavy castables, and the top is covered with light castables and fiber insulation layers, which are collectively called furnace roof refractories. The furnace roof refractory load is transmitted to the furnace roof steel structure by hangin...

AI Technical Summary

Problems solved by technology

This method needs to drop the furnace pressure to negative pressure, which affects the normal production of the heating furnace

It can only deal with cracks with a small cracking width on the roof refractory material, and cannot repair the large-area shed roof refractory material, and can only relieve the furnace top fire in a short period of time, usually 10 to 15 days, and cannot effectively solve the problem

The second treatment method is to directly replace the entire furnace top refractory material. This method takes a long time to shut down the furnace and requires a large investment. Unless the lining of the heating furnace refractory material has reached the point where it cannot be repaired, the entire furnace top refractory material will be replaced. Methods

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