Inspection and Repair Method of Blast Furnace Top Gas Cover

Abstract

The invention provides an overhauling method for a blast furnace top gas sealing cover. The overhauling method comprises the following steps that a cross-shaped temperature measuring rod of a blast furnace body is removed, a mounting hole of the cross-shaped temperature measuring rod in the blast furnace body is left, and an air pipe is installed at the mounting hole; the air pipe communicates with dust removal equipment; blowing-down materials and water pressing slag materials are loaded in a blast furnace, and the material level in the blast furnace is decreased to be below the position of the cross-shaped temperature measuring rod; a protective shed is installed in the blast furnace top gas sealing cover, so that the protective shed, the blast furnace body and the material level in theblast furnace form a relatively closed space; the dust removal equipment is used for pumping and discharging gas generated by the material level in the blast furnace from the air pipe, and the gas isprevented from being moved to the position above the protective shed. By means of the overhauling method for the blast furnace top gas sealing cover, the gas content inside the sealing cover is greatly reduced, safety inspection is achieved, maintenance time is shortened, the labor intensity of workers is reduced, and the aim of blast furnace production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of maintenance of blast furnace top equipment, and in particular relates to a method for maintenance of a blast furnace top gas seal. Background technique [0002] In the blast furnace top gas cover and riser pipe, because the temperature of the furnace top is high and fluctuates frequently, the dust-laden airflow in the center of the furnace is severely scoured, which can easily cause damage to the refractory materials at the gas cover and riser pipe. The refractory material of the blast furnace top gas enclosure cannot be synchronized with the age of the blast furnace first generation, so it is necessary to carry out inspection and maintenance of the enclosure in the blast furnace during the blast furnace shutdown process. This must require long-time operation in the furnace, and there is gas generation all the time in the furnace, which belongs to the maintenance operation in the limited gas-tight space. [0003] ...

AI Technical Summary

Problems solved by technology

At present, when domestic blast furnaces enter the gas enclosure for maintenance, the control of gas is controlled by pressurized water slag for a long time, but the actual effect can only guarantee the temperature of the working environment, and cannot effectively reduce the gas inside the enclosure. content, the maintenance time inside the enclosure is long, the required maintenance personnel have a high rotation frequency, and the quality of maintenance cannot be guaranteed, and there is a great potential safety hazard of gas poisoning

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