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Operation method for stabilizing carbon content of duplex molten iron of converter

An operation method and a technology of carbon content, applied in steel manufacturing process, converter manufacturing, metal processing, etc., can solve problems affecting production smoothness, converter operation instability, etc., to improve production efficiency, stable control, and stability The effect of process time

Active Publication Date: 2022-05-10
XINJIANG BAYI IRON & STEEL
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Problems solved by technology

This method cannot achieve 100% desiliconization product SiO 2 Pour out, mainly used to smelt ordinary carbon steel, but the higher the silicon content in the molten iron, the more unstable the operation of the converter, affecting the smooth production

Method used

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  • Operation method for stabilizing carbon content of duplex molten iron of converter
  • Operation method for stabilizing carbon content of duplex molten iron of converter
  • Operation method for stabilizing carbon content of duplex molten iron of converter

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Embodiment Construction

[0010] An operation method for the carbon content of molten iron after the converter is stabilized and double-connected. According to the tracking data, coke is added during the tapping process: the carbon content is 80%-85%, and the recovery rate of burning phenomenon is between 45%-55%. The compensation is calculated to The addition amount of the target carbon content is shown in the table below:

[0011]

[0012] According to the deviation between the predicted value and the target value, coke is selected to be added during the tapping process, the carbon content of molten steel after desiliconization is controlled between 2.5% and 3.0%, and the smelting time of molten steel after stable desiliconization is 8-10 minutes, which is the smelting process Provide sufficient reaction time for temperature raising and dephosphorization, and stabilize the subsequent smelting operation of double-linked molten iron.

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Abstract

The invention discloses an operation method for controlling the carbon content of molten iron after converter stable duplex, which comprises the following steps: adding coke in the tapping process through tracking data: the carbon content is 80-85%, the recovery rate of combustion phenomenon is 45-55%, calculating the addition amount compensated to the target carbon content, and selecting to add nut coke in the tapping process according to the deviation between a predicted value and a target value, the carbon content of the desiliconized molten steel is controlled to be 2.5%-3.0%, the smelting time of the desiliconized molten steel is stabilized to be 8-10 minutes, sufficient reaction time is provided for temperature rising and dephosphorization in the smelting process, and the subsequent smelting operation of the duplex molten iron is stabilized.

Description

technical field [0001] The invention relates to an operation method for stabilizing the carbon content of molten iron after double-connected converters. Background technique [0002] Converter smelting of high-silicon hot metal includes two methods: double-slag method and double-link method. The double slag method is a commonly used slagging method for converter steelmaking, mainly for processing molten iron with a silicon content of 0.7%-1.2%. This method cannot achieve 100% desiliconization product SiO 2 Poured out is mainly used to smelt ordinary carbon steel, but the higher the silicon content in the molten iron, the more unstable the operation of the converter, which affects the smooth production. The dual desiliconization process is mainly used to smelt molten iron with a silicon content of 1.2%-7.0%. A desiliconization converter removes high silicon to less than 0.6%. The ladle is used to transport the desiliconized molten iron to the rotary furnace, and the iron l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21C5/46
CPCC21C5/28C21C5/466C21C2300/06Y02P10/20
Inventor 韩雨亮张浩梁岗
Owner XINJIANG BAYI IRON & STEEL
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