Technological method for plugging treatment of blow-by under-pressure coal gas of blast furnace foundation sealing plate

Abstract

The invention relates to a technological method for plugging treatment of blow-by under-pressure coal gas of a blast furnace foundation sealing plate. The technological method is characterized by comprising the following steps: three composite materials with different performances namely solid dedicated resin composite material, plastic dedicated colloid material and high-strength castable are adopted as the plugging material in a blast furnace foundation sealing plate cavity, and after the technological method for plugging treatment of blow-by under-pressure coal gas of the blast furnace foundation sealing plate is carried out, the plugging sealing material tightly combines with the blast furnace foundation sealing plate and cement foundation pier surface material in a protective box of the blast furnace foundation sealing plate, does not generate cracks, gaps or holes, has high bonding strength, tenacity and rigidity, and absolutely changes the internal structure of the protective box of the blast furnace foundation sealing plate, so that the defects generated at the joint part of the blast furnace foundation sealing plate and the blast furnace foundation cement foundation pier are fully repaired and fitted, the problem that the blast furnace foundation sealing plate leaks under-pressure coal gas is solved, and safe operation of blast furnace production and energy conservation are ensured.

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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