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RC process technology for researching [Mn] [Si] elements from LF refining slag components

A technology of refining slag and process technology, which is applied in the field of RC process of LF refining slag component research [Mn][Si] element, can solve problems affecting steel quality, etc., achieve the effects of slowing down the erosion rate and improving the life of the ladle

Pending Publication Date: 2022-04-08
SHANDONG LAIGANG YONGFENG STEEL & IRON
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the remaining (Al 2 0 3 ) exists in the form of coarse clusters, and cracks are formed during processing, which affects the quality of steel

Method used

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  • RC process technology for researching [Mn] [Si] elements from LF refining slag components
  • RC process technology for researching [Mn] [Si] elements from LF refining slag components
  • RC process technology for researching [Mn] [Si] elements from LF refining slag components

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Embodiment Construction

[0014] The preferred embodiments of the present invention will be described in detail below in conjunction with the table, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0015] This embodiment includes the following steps:

[0016] 1. Oxygen content process control steps in smelting and tapping process:

[0017] Fully refer to the previous furnace smelting control process under similar conditions, do a good job in the process control of this furnace, calculate the actual feeding machine, use the timing of adding slagging material, stabilize the gun position control and reduce the fluctuation caused by the gun position adjustment, measure the smelting time and temperature rise Amplitude, to ensure that the charcoal pulling temperature is controlled at 1620-1660°C, adjust the position of the gun 2 minutes before the end point to d...

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Abstract

The invention discloses an RC process technology for researching [Mn] [Si] elements from LF refining slag components, which comprises the following steps: adding calcium carbide in a refining slagging process link to reduce the percentage content of (MnO + FeO) in slag; an aluminum-calcium deoxidizer is added in the converter tapping alloying process link, the percentage of refining slag (SiO2) is reduced to be smaller than or equal to 24%, the percentage of slag (MnO + FeO) is further reduced to be smaller than or equal to 1.5%, and the basicity R of the slag is controlled to be 1.6 + / -0.15; 5% of fluorite is added into the slag. On the premise of not increasing the addition amount of the refined top slag lime, the alkalinity R of the refined slag is increased to 1.6 + / -0.1 from the original 1.0 + / -0.1, and by matching with other related measures, the erosion rate of a steel ladle slag line can be slowed down, and the service life of a steel ladle is prolonged.

Description

technical field [0001] The present invention relates to the technical field of metallurgy, and more specifically relates to an RC process technology for studying [Mn][Si] elements in LF refining slag components. Background technique [0002] Si and Mn elements are commonly used as alloy deoxidizers in steelmaking production, but the deoxidation effect is poor, and it is difficult to reduce the oxygen content in steel to a very low level. In order to improve the yield of the alloy, it is studied to use cheap aluminum-calcium series elements as deoxidizers. Al is not only a strong deoxidizer, but also contains a certain amount of acid-soluble aluminum in the steel, which can refine the grain size of the steel and prevent the secondary process of molten steel. oxidation. However, the remaining (Al 2 0 3 ) exists in the form of coarse clusters, and cracks are formed during processing, which affects the quality of steel. How to reduce the oxygen content in steel, improve the ...

Claims

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Application Information

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IPC IPC(8): C21C7/00C21C7/06C21C7/064
CPCY02P10/20
Inventor 王新亮蒋毅王冰苏庆林怀善春王功胜王朋林世玺孙怀彬
Owner SHANDONG LAIGANG YONGFENG STEEL & IRON