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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Problems solved by technology

A better desulfurization effect has been achieved, but since

Method used

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Example Embodiment

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

[0013] 5-10wt% of passivated magnesium is mixed with Fe powder as the remainder, and after mixing, it is covered with a 0.20-0.30mm thick thin steel strip to form a Mg-Fe cored wire. The processing and manufacturing method is the same as other commonly used alloy cored wires, and the joints of the straight seams should be dense and firm without cracking and powder leakage.

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

[0015] Example [2] A cored wire used for deep desulfurization in a...

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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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