Annealing furnace inside atmosphere control method and system

A furnace atmosphere and control method technology, applied in furnace control devices, furnaces, furnace components, etc., can solve the problems of blindness, poor atmosphere stability, blindness, etc., and achieve the effect of ensuring stable operation, ensuring annealing quality, and solving fluctuations

Active Publication Date: 2019-01-15
湖南华菱涟源钢铁有限公司 +1
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Problems solved by technology

Domestic research has shown that in order to ensure the quality of galvanizing, the atmosphere in the non-oxidizing section of the furnace should be weakly reducing to eliminate free oxygen in the flue gas, so that the oxidizing gas and reducing gas (such as CO 2 /CO,H 2 O/H 2 ) is within a reasonable range, but in actual production, the calorific value or gas pressure of the gas fluctuates, and the actual air supply cannot be adjusted in real time, which will lead to excessive oxidative components in the furnace. Traditionally used It is manual adjustment, which has great untimelyness and blindness, and the resulting quality defects are also obvious, and it is difficult to meet the requirements of lean production
At present, the solution generally adopted by domestic and foreign production enterprises is to install an off-line furnace composition anal

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  • Annealing furnace inside atmosphere control method and system
  • Annealing furnace inside atmosphere control method and system
  • Annealing furnace inside atmosphere control method and system

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[0047] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0048] like figure 1As shown, the technical solution provided by this embodiment is as follows:

[0049] A method for controlling the atmosphere in an annealing furnace, comprising the steps of:

[0050] S101: According to the historical production data of the annealing furnace under stable working conditions, analyze and obtain the r...

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Abstract

The invention discloses an annealing furnace inside atmosphere control method which comprises the following steps of according to the historical production data of an annealing furnace under the stable working condition, analyzing to obtain a relation table of annealing furnace heating section excess air coefficients and preheating section smoke gas oxygen contents; judging whether an annealing furnace heating schedule is changed or not; and if not, monitoring the annealing furnace preheating section smoke gas oxygen content through an oxygen content analyzer, comparing with the relation table, and adjusting the annealing furnace heating section excess air coefficient. According to the annealing furnace inside atmosphere control method provided by the invention, the non-oxidation section furnace inside atmosphere fluctuation caused by the coal gas caloric value change or the coal gas pressure fluctuation is timely and effectively solved, the non-oxidation section furnace inside weaklyreducing atmosphere is ensured to run stably, and meanwhile, the coal gas is sufficiently utilized through the feedforward control on the preheating section air amount, so that the energy is saved.

Description

technical field [0001] The invention relates to the technical field of combustion control of an annealing furnace, in particular to a method and system for controlling the atmosphere in an annealing furnace. Background technique [0002] The hot-dip galvanizing annealing furnace is one of the most important equipment on the hot-dip galvanizing unit, mainly used for annealing the strip steel. The annealing quality of the cold-rolled strip plays a vital role in the properties of the strip after hot-dip galvanizing. The improved Sendzimir hot-dip galvanizing annealing furnace usually consists of a non-oxidizing section, a reducing section, a slow cooling section, and a fast cooling section. After the steel strip undergoes rapid temperature rise in the non-oxidizing section, recrystallization annealing in the reducing section, heat preservation, slow cooling and rapid cooling, it enters the zinc pot for galvanizing through the furnace nose. The front part of the non-oxidation ...

Claims

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Application Information

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IPC IPC(8): F27D19/00
CPCF27D19/00F27D2019/0015
Inventor 冯力力容东阳郑灵科黄兆军张乐李文
Owner 湖南华菱涟源钢铁有限公司
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