Process method for plugging treatment of gas under pressure in blast furnace base sealing plate

Abstract

The invention relates to a process method for plugging and treating leakage of pressurized gas from the base sealing plate of a blast furnace. Colloidal materials and high-strength castables are the plugging materials. After the process of plugging and controlling the leakage of pressurized gas from the blast furnace base sealing plate is carried out, the plugging and sealing materials are sealed with the furnace base in the protection box of the blast furnace base sealing plate. The surface materials of the board and the cement-based pier are closely combined without cracks, gaps, and voids, and have high bonding strength, toughness and rigidity, which has completely changed the internal structure of the blast furnace base sealing plate protection box, making the blast furnace base sealing plate The defects at the junction with the cement-based pier of the furnace base are fully repaired and reconciled, which solves the leakage of pressurized gas from the sealing plate of the furnace base of the blast furnace, and ensures the safe operation of the blast furnace production and energy saving.

Description

technical field [0001] The invention belongs to the technical field of blast furnace smelting and maintenance in the metallurgical industry, and relates to a sealing process for leaking gas under pressure at the junction of a metal sealing plate of a blast furnace base and a concrete prefabricated part of a concrete cement base pier, in particular to a sealing of a blast furnace base A technological method for plugging and controlling of plate blow-by with pressurized gas. Background technique [0002] At present, the furnace bottom sealing plate and the furnace base sealing plate structure are adopted in the design of the blast furnace body in the prior art in China, mainly to ensure the sealing of the operating pressure of the blast furnace and to prevent the high-pressure gas in the blast furnace cavity from passing through the furnace base. Forced blocking. After the blast furnace has been in operation for a period of time, due to the influence of welding defects in the...

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Problems solved by technology

After the blast furnace has been in operation for a period of time, due to the influence of welding defects in the bottom sealing plate during blast furnace construction, or accidents such as detonation in the blast furnace operation process, some blast furnaces have defects in the welding part of the bottom sealing plate and leak to the furnace base. Gas under pressure leaks to the outside of the furnace body through the junction of the furnace base sealing plate and the concrete cement base pier, resulting in an extremely high gas volume around the furnace base, which is prone to serious safety accidents. In order to reduce the toxicity of the gas, it is necessary to ignite it. The high temperature generated seriously deforms the sealing plate of the furnace base, and the high-temperature gas that escapes outside will affect the operating temperature parameters of the hearth and the consumption and waste of gas, increase the operating cost of the blast furnace, cause malignant accidents, and cause fatal accidents caused by gas poisoning and blast furnace spot inspection Difficult problems in the normal operation of blast furnaces such as casualties caused by gas poisoning of operators

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