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Alloy cored wire for deeply desulfurization of steel bucket finery and its preparation method

A refining furnace and deep desulfurization technology, which is applied in the field of desulfurizers, can solve problems such as the increase of Al in molten steel, and achieve low cost and good desulfurization effect

Inactive Publication Date: 2006-11-22
WUHAN UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

A better desulfurization effect has been achieved, but since the powder contains Al, the molten steel will also increase Al

Method used

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Examples

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Embodiment Construction

[0012] Example [1] A cored wire for deep desulfurization in a steel barrel refining furnace and its preparation method.

[0013] Mix 5-10wt% passivated magnesium with Fe powder as the balance, cover with 0.20-0.30mm thick thin steel strip after mixing to make Mg-Fe cored wire. The processing and manufacturing method is the same as that of other common alloy cored wires, and the bite of the straight seam must be dense and firm without cracking or powder leakage.

[0014] The Mg-Fe cored wire produced in this embodiment can be fed during refining in the steel drum furnace, and the sulfur content of the molten steel before feeding the wire is 0.008-0.015%. The feeding amount of the cored wire is 4~8kg / ton of steel, the feeding speed is 1~3m / s, the refining time is 10~20min, and the tapping temperature is 1580~1650℃. This embodiment has low cost and good desulfurization effect.

[0015] Example [2] A cored wire for deep desulfurization in a steel barrel refining furnace and its ...

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PUM

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Abstract

The invention discloses a core-spun yarn and preparing method of steel drum finer deep desulfuration, which comprises the following parts: blending 3-12 wt percent passivation magnesium residual Fe powder or adjusted CaO-CaF2 premelting ground-slag agent or adjusted CaO-BaO-CaF2 premelting ground-slag agent; covering through 0.20-0.30 mm thickness thin steel to produce Mg-Fe core-spun yarn, or Mg-CaO-CaF2 core-spun yarn or Mg-CaO-BaO-CaF2 core-spun yarn. The invention reduces the cost, which possesses excellent desulfuration effect to control steel liquid ingredient.

Description

1. Technical field [0001] The invention belongs to the technical field of desulfurizer used for deep desulfurization in steel drum furnace refining. In particular, it relates to a cored wire used for deep desulfurization of a steel barrel refining furnace and a preparation method thereof. 2. Background technology [0002] With the advancement of science and technology, higher requirements are placed on steel quality in high-rise buildings, long-distance oil pipelines, underground and marine facilities, aerospace, energy storage, and high-speed railways. In particular, the sulfur content in steel is required to be lower and lower, that is, it is desired to control the sulfur content in steel to a low sulfur level below 0.0050%. Therefore, refining desulfurization is very important, and feeding line desulfurization is one of the methods. [0003] At present, the powders that use feeding line desulfurization are CaO-BaO-CaF 2 Powder, Ca-Si-Mg powder, Ca-Al alloy powder, etc....

Claims

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Application Information

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IPC IPC(8): C21C7/064
Inventor 倪红卫易卫东谢中张华何环宇
Owner WUHAN UNIV OF SCI & TECH
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