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A kind of antimony wire used in rh refining and its adding method

A technology of antimony wire and metal antimony, which is applied to the antimony wire used in RH refining and the field of adding it to achieve the effects of improving yield, reducing environmental pollution and improving refining efficiency

Active Publication Date: 2018-02-23
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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  • Abstract
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  • Claims
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Problems solved by technology

[0008] The object of the present invention is to provide a kind of antimony wire used in RH refining and its adding method, so as to solve the problems such as Sb yield in the existing RH refining process

Method used

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  • A kind of antimony wire used in rh refining and its adding method

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Embodiment

[0020] The steel type is silicon steel W600, the size of the ladle used is 200t, and the weight of molten steel is 175-185t. Taking the vacuum treatment of the process of the present invention as an example, the present invention is further described.

[0021] During RH vacuum refining, antimony wire is fed to the ladle. The antimony wire includes metal antimony as the inner core and the outer steel shell. The inner diameter of the inner core of the antimony wire is 8mm, and the weight of metal antimony contained in the inner core is not less than 326g / m. The inner core metal antimony contains 97% antimony by mass percentage, and the thickness of the outer steel shell of the antimony wire is 4mm. The structure diagram of the antimony wire is as follows figure 1 shown.

[0022] The mass percent of molten steel composition before RH vacuum cycle treatment is: C 0.042%; Si 0.0035%; Mn 0.082%; P 0.0103%; S 0.0016%; Al 0.0008; Sb 0.0006%;

[0023] The molten steel was subjected to...

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Abstract

The invention discloses an antimony wire for RH refining and an adding method thereof. An antimony ingot is added in molten steel by using a wire feeding mode; such factors as antimony wire adding position and adding speed and ladle bottom blowing are synchronously controlled to guarantee most antimony elements to be molten in the molten steel as far as possible, so that the gasification quantity of the antimony elements is largely reduced, and the yield of the antimony elements is obviously increased; and compared with the prior art, the adding method is a process with the advantages of simple, easiness in operation and environmental protection.

Description

technical field [0001] The invention relates to the field of external refining of molten steel, in particular to an antimony wire used in RH refining and a method for adding the same. Background technique [0002] Antimony (Sb) is a large atomic surface active element, brittle and hard, brittle, non-ductile, and poor in mechanical properties. Its melting point is 630°C and boiling point is 1590°C. It is a fusible and volatile metal. [0003] In the process of steel smelting, especially in the process of smelting high-grade non-oriented silicon steel, in order to improve and stabilize the magnetic properties of silicon steel, Sb is an important alloying element. Lyudkovs et al. used ion scattering spectroscopy (ISS) and inverse pole figure technology to study the changes in grain size, hardness and texture of Fe-1% Si non-oriented silicon steel after adding 0.09% Sb, and obtained the following conclusions: [0004] (1) Antimony can promote the formation of texture components...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/10
CPCC21C7/0056C21C7/10
Inventor 赵家七邹长东许涛刘飞
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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