Press-in type repairing method for hot blast heater top heat-resisting lining

Abstract

The invention provides a press-in type repairing method for a hot blast heater top heat-resisting lining. The press-in type repairing method includes the steps of S10, press-in hole manufacturing, wherein according to the size of a gap between a heater top shell and the resisting lining, the center of the hot blast heater top is used as a circle center, a plurality of press-in holes are formed in the direction to the circumferential periphery in a layered manner, and the press-in holes comprise outer press-in holes and inner press-in holes; S20, outer press-in hole surrounding repairing, wherein equipment for providing press-in materials is connected to the press-in holes through a pipe, press-in operation is implemented on the outer press-in holes through the first press-in material, and the periphery of the gap is surrounded and stopped; and S30, inner press-in hole filling repairing, wherein a material to be pressed loses mobility, after the intensity is initially obtained, press-in operation is implemented on the inner press-in holes through the second press-in material, and a surrounding and stopping structure formed in the step S20 is closed. In-turn layered pressing and matched filling are carried out, and rapid repairing of the heat-resisting lining is achieved.

Description

technical field [0001] The invention relates to a repair technology for a hot blast stove top, in particular to a press-fit repair method for a heat-resistant inner lining of a hot blast stove top. Background technique [0002] The function of the hot blast stove of the ironmaking blast furnace is to improve the working efficiency of the ironmaking blast furnace by heating the blast to the required temperature; at present, the refractory lining of the top of the hot blast furnace is generally made of high alumina bricks, andalusite bricks, silica bricks, etc. The specific working principle of the checker brick is as follows: [0003] The gas is burned in the combustion chamber of the hot blast stove, and the high-temperature exhaust gas passes through the checker bricks and makes it store heat. When the checker bricks are fully heated, all valves related to combustion are closed at this time, and the air supply valves are opened, and the hot blast stove can be changed to sen...

AI Technical Summary

Problems solved by technology

[0004] In order to facilitate masonry, the checker bricks on the top of the hot blast stove are often "combined bricks" made with reference to the shape and size of the top of the hot blast stove. Influenced by other factors, the above-mentioned combination brick structure is easy to cause load softening. There will inevitably be gaps of varying degrees between the combination bricks and insulation bricks of the original spherical roof and the steel shell of the furnace roof, and the hot air will escape through the gaps of the combination bricks. As a result, the temperature at the top of the furnace, especially the periphery of the dome top, is too high, and the outer steel shell of the furnace top is scorching hot, causing the hidden danger of high-temperature oxidation or even burning through the steel shell of the furnace top. Therefore, measures are taken to ensure that the temperature of the dome does not exceed the limit. It is very necessary to reduce the temperature of the supply air to avoid the loss of heat, so as to reduce the waste of heat energy

[0005] Aiming at the problem that the temperature of the outer steel shell of the furnace roof is too high, the more common general measures are to dismantle the furnace roof and re-lay bricks or formwork pouring for maintenance, which not only consumes materials, the workload is large, and the construction period is long, but also the blast furnace is required during the renovation. downtime, affecting productivity

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