Method for deoxidization and alloying by using ferro-silico-manganese alloy

A technology for silicon-manganese ferroalloy and deoxidation alloying, which is applied in the field of deoxidation and alloying using silicon-manganese ferroalloy, can solve the problems of high smelting cost and the inclusions are not easy to float up, and achieve the effect of reducing cost

Inactive Publication Date: 2012-09-05
BENGANG STEEL PLATES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The task of the present invention is to provide a method of using silicon manganese ferroalloy deox

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] In the process of producing low-carbon and low-silicon steel (H08 series varieties), the dissolved oxygen content in the converter is first detected. 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 dissolved oxygen content in the converter The best choice is: 600-800ppm, then output the molten steel in the converter to the ladle, and in the process of outputting the converter to the molten steel, add silicon-manganese ferroalloy to the ladle at the same time, and all the molten steel in the converter is input into the ladle Finally, if the dissolved oxygen content in the ladle reaches 100-300ppm, stop adding ferrosilicon manganese alloy to it, and then use the wire feeder to input aluminum wire into the ladle, usually input 1 meter of aluminum wire into the ladle, the Dissolved oxygen will be reduced by 1ppm, and when the dissolved oxygen content in the ladle reaches 15-35ppm, stop inputt...

Embodiment 2

[0014] In this embodiment, the deoxidation and alloying method of silicon-manganese-ferroalloy is the same as that of Example 1, except that the silicon-manganese-ferroalloy can adopt the following chemical composition in mass percentage: 20% silicon, 55% manganese, and 25% iron.

Embodiment 3

[0016] In this embodiment, the deoxidation and alloying method of ferro-silicomanganese alloy is the same as that of embodiment 1, except that the ferro-silicon-manganese alloy can adopt the following chemical composition in mass percentage: 17% silicon, 62% manganese, and 21% iron.

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PUM

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Abstract

The invention relates to a method for deoxidization and alloying by using a ferro-silico-manganese alloy. The method comprises the following steps of: firstly detecting the content of dissolved oxygen in a converter, taking 600-1300ppm as the end point of the converter when the content of dissolved oxygen in the converter is blown to 600-1300ppm, secondly adding the ferro-silico-manganese alloy to a steel ladle, stopping adding the ferro-silico-manganese alloy when the content of dissolved oxygen in the steel ladle reaches 100-300ppm, and thirdly inputting aluminium wires to the steel ladle by utilizing a wire feeding machine and stopping inputting the aluminium wires when the content of dissolved oxygen in the steel ladle reaches 15-35ppm, thus obtaining the smelted steel. The method has the following beneficial effects: silicon contained in the ferro-silico-manganese alloy in the molten steel is removed by utilizing the high content of the dissolved oxygen; and as the ferro-silico-manganese alloy is cheaper than the medium ferro-manganese alloys, the cost of smelting low-silicon and low-carbon steel can be lowered by adopting the method.

Description

technical field [0001] The invention relates to a method for deoxidation and alloying of silicon-manganese-ferroalloy. 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 content of a...

Claims

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Application Information

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IPC IPC(8): C21C7/06C22C33/06
Inventor 刘真海吴玉强
Owner BENGANG STEEL PLATES
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