Method for maintaining heat-resisting cushion block of stepping type heating furnace

Abstract

The invention discloses a method for maintaining a heat-resisting cushion block of a stepping type heating furnace. The method solves the problems that a traditional water beam cushion block of a stepping type heating furnace for metallurgy is long in on-site replacement construction time, difficult to replace, and high in maintenance cost. The method comprises the following steps: (1) removing surrounding refractory materials and Y-type anchoring hooks which affect the cushion block and a press block, (2) cutting and removing cushion blocks needing to be replaced through a grinding machine, (3) grinding the portion where the cushion block is installed to be smooth through the grinding machine, (4) finding a center and a level, and installing the cushion block, (5) measuring the level of the installed cushion block through a measuring instrument, adjusting the installed cushion block to be in order, and welding the press block, (6) measuring the level of the cushion block after the press block is welded, and adjusting the cushion block in order, (7) welding the Y-type anchoring hooks, (8) installing a fiber blanket thermal insulating layer, (9) ramming repairing materials, and (10) conducting test run and ignition baking oven operation. On the premise that the service life of the water beam cushion block is prolonged, the method has the advantages that the maintenance cost is low and the replacement construction time is shortened greatly, and the economic benefits are remarkable.

Description

technical field [0001] The invention relates to a maintenance method for a heat-resistant cushion block of a walking heating furnace, which belongs to the field of metallurgical heating furnaces. Background technique [0002] The water-cooled beams of walking heating furnaces for metallurgy are divided into two types: fixed beams and movable beams. The walking beams repeatedly move on a rectangular track to transport the slab from the charging end to the discharging end. The water-cooled horizontal beam of the walking heating furnace is composed of numerous heat-resistant pads installed on the thick leather tube, and the water beam supports the slab through the heat-resistant pads. During the current operation process, the heat-resistant pads have been subjected to high temperature for a long time, and the surface has been continuously oxidized, worn, and cracked, and even caused the pads to partially fall off. There are also black marks on the heating water pipes that cause...

AI Technical Summary

Problems solved by technology

During the current operation process, there are heat-resistant pads for a long time at high temperature, and the surface is continuously oxidized, worn, burned, and even partially detached from the pads, and there are also black marks on the heating water pipes that cause uneven thickness of the rolled plate.

Generally, the degree of oxidation and burning of heat-resistant pads of water beams is different, which brings great difficulties to the maintenance of heat-resistant pads. The cost of replacing heat-resistant pads of water beams is high and the maintenance time is long. Even after overhaul, it will cause problems such as deviation, shortened service life and failure to meet process requirements.

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