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Molten steel refining slag composition design method

A technology of composition design and refining slag, which is applied in the field of composition design of molten steel refining slag, can solve the problem that the target composition of inclusions cannot be taken into account at the same time, and achieve the effect of reducing the number of inclusions, ensuring quality and performance, and realizing precise control

Inactive Publication Date: 2018-11-23
ANHUI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0009] The purpose of the present invention is to overcome the deficiency that the existing refining slag cannot take into account the two tasks of controlling the target composition of inclusions and reducing the number of inclusions at the same time, and provides a method for designing the composition of molten steel refining slag

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  • Molten steel refining slag composition design method
  • Molten steel refining slag composition design method
  • Molten steel refining slag composition design method

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Embodiment 1

[0095] This embodiment is mainly aimed at the production of bearing steel. Al deoxidation is mainly used in the production process of bearing steel. The Al element added to molten steel reacts with [O] in the steel: 2[Al]+3[O]=Al 2 o 3 , the corresponding inclusions are mainly Al 2 o 3 . Due to the need to ensure that the steel has a low oxygen content in the production process of bearing steel, and the level of oxygen content is related to the oxide inclusion Al 2 o 3 is closely related to the amount of Al 2 o 3 The removal of inclusions at the steel slag interface is beneficial to reduce the oxygen content in the steel. For this purpose, for CaO-SiO 2 -Al 2 o 3 Slag system, according to Al 2 o 3 The inclusions are subjected to buoyancy, drag, rebound and additional mass force at the steel slag interface, and the Al 2 o 3 The motion model of inclusions at the steel slag interface is calculated and solved by using C++ language and the fourth-order Runge-Kutta meth...

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Abstract

The invention provides a molten steel refining slag composition design method and belongs to the technical field of clean steel smelting. The method includes: building and solving a steel slag interface inclusion motion model, quantitatively evaluating the influence of inclusion size, inclusion density, slag phase density, slag phase viscosity, molten steel density, molten steel viscosity and thewettability of inclusion at the steel slag interface on the motion removing process of the inclusion at the steel slag interface, determining the slag phase viscosity range and slag phase compositionrange when the inclusion can be removed, and determining the optimal refining slag composition range according to the target composition control requirement of the inclusion in steel. The method has the advantages that the defect that the prior art cannot give consideration to both inclusion target composition control and inclusion quantity reduction is overcome, the required refining slag composition suitable for the production of different types of steel can be determined in advance, enterprise production cost can be lowered favorably, and steel product quality can be increased favorably.

Description

technical field [0001] The invention belongs to the technical field of clean steel smelting, and more specifically relates to a composition design method of molten steel refining slag. Background technique [0002] As a structural functional material, steel is widely used in aerospace, automobile manufacturing, petrochemical and construction industries, and plays an irreplaceable role in social production and life with its low price and reliable performance. With the development of society and the improvement of production technology, people have put forward higher requirements for steel materials, mainly for low total oxygen content in steel, small number of inclusions and good deformation ability. The existence of inclusions in the steel destroys the continuity of the steel matrix. If the melting point is high, it is not easy to deform, and it is easy to cause cracks around the inclusions in the subsequent rolling process, which seriously affects the quality and performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2119/08G06F2119/06G06F30/20
Inventor 凌海涛徐蕊周俐彭世恒王海军
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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