Ferro-silico-manganese alloy for smelting low-silicon low-carbon steel

A technology of silicon-manganese-ferroalloy and low-carbon steel, which is applied in the field of silicon-manganese-ferroalloy, can solve the problems of high smelting cost and inclusions are not easy to float, and achieve the effect of reducing costs

Inactive Publication Date: 2012-09-05
BENGANG STEEL PLATES +1
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  • Abstract
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Problems solved by technology

[0004] The task of the present invention is to provide a ferro-silicon-manganese alloy for smelting low-silicon and low-carbon steels to solve the problems of high smelting cost and difficulty in floating inclusions. SiMn ferroalloy

Method used

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Embodiment 1

[0010] Ferrosilicon manganese alloy can adopt the following mass percentage chemical composition: silicon 15%, manganese 65%, iron 20%; silicon manganese ferroalloy can also adopt the following mass percentage chemical composition: silicon 20%, manganese 55%, iron 25%; The iron alloy can also adopt the following chemical composition in mass percentage: 16% silicon, 63% manganese, and 21% iron. In the process of producing low-carbon and low-silicon steel (H08 series) by using this silicon-manganese ferroalloy, the dissolved oxygen content in the converter is first detected, and when the dissolved oxygen content in the converter is blown to 600-1300ppm, it can be used as the end point of the converter. The best choice of dissolved oxygen content in the interior is: 600-800ppm, and then the molten steel in the converter is output to the ladle, and during the process of outputting the converter to the molten steel, silicon-manganese ferroalloy is added to the ladle at the same ti...

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Abstract

The invention relates to a ferro-silico-manganese alloy for smelting low-silicon low-carbon steel, which comprises the following chemical components in percentage by mass: 15-20% of silicon, 55-65% of manganese and the balance of iron. The price of the ferro-silico-manganese alloy is very low, so the deoxidation alloying method can lower the cost for smelting low-silicon low-carbon steel. Besides, since the ferro-silico-manganese does not contain aluminum, aluminum oxide can not be generated when adding the ferro-silico-manganese alloy into molten steel, and inclusions in the molten steel can easily float upward, and thus, can not influence the refining procedure.

Description

technical field [0001] The invention relates to a silicon-manganese ferroalloy used for smelting low-silicon and low-carbon steel. Background technique [0002] In the process of smelting low-silicon and low-carbon steel in the converter, it is necessary to deoxidize and alloy the molten steel so that the mass percentage of each chemical component in the molten steel meets the following requirements: carbon ≤ 0.10%, silicon ≤ 0.03%, phosphorus ≤ 0.02%, Sulfur ≤ 0.03, manganese 0.35-0.60%. It can be seen that in the above-mentioned steel types, since the content of silicon is quite low, in the prior art, materials containing silicon should be avoided for deoxidized and alloyed alloys, and aluminum manganese titanium, aluminum manganese calcium, and aluminum alloys are usually used. Wire and medium carbon ferromanganese are used as materials for deoxidation and alloying. Although the above types of materials have deoxidation and alloying properties, due to the high aluminum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C22C35/00C22C22/00
Inventor 刘真海吴玉强
Owner BENGANG STEEL PLATES
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