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Silicon-manganese coal ash deoxidier for steelmaking and preparation method thereof

A technology of fly ash and deoxidizer, which is applied in the field of steelmaking, can solve problems such as unsmoothness and high cost, and achieve the effects of smooth process, reduced content, and improved fluidity of molten steel

Active Publication Date: 2012-10-31
芜湖县天海耐火炉料有限公司
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  • Claims
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Problems solved by technology

[0002] At present, the deoxidizers used in the domestic industrial steelmaking production process are mainly calcium, aluminum or iron alloys, etc. The deoxidation effect has always reached the level of 60-100PPM, and the effect is average. Observe that there are large bubbles and slag inclusions in the section of the billet, and the cost is high

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  • Silicon-manganese coal ash deoxidier for steelmaking and preparation method thereof

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Embodiment 1

[0010] Embodiment 1: silicon-manganese fly ash deoxidizer for steelmaking, the parts by weight of its composition raw materials are: quartz sand 100, calcareous shale 12, fly ash 22, fluorite 12, charcoal 4, waste aluminum powder 7, Attapulgite 28, black manganese ore 12.

[0011] The preparation method of the silico-manganese fly ash deoxidizer for steelmaking comprises the following steps: weighing each raw material according to the weight of the constituent raw materials, putting them into a submerged arc furnace for smelting, the smelting temperature is 2100-2500°C, and the smelting time is 2-3 Hours, broken to 70-90 mm, remove impurities, that is the finished product.

[0012] The following is the deoxidation test, the test steel is low carbon steel, used in 2# furnace, 1.36kg / t steel

[0013] Hot metal conditions:

[0014] [S]S% [P]% 0.039-0.032 0.190-0.152

[0015] Deoxygenation result:

[0016] serial number furnace number Addition ...

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Abstract

The invention discloses a silicon-manganese coal ash deoxidier for steelmaking and a preparation method of the silicon-manganese coal ash deoxidier. The silicon-manganese coal ash deoxidier comprises the following raw materials in parts by weight: 90 to 110 parts of quartz sand, 10 to 15 parts of calcareous shale, 20 to 25 parts of coal ash, 10 to 15 parts of fluorite, 3 to 5 parts of charcoal, 5 to 8 parts of waste aluminum powder, 25 to 30 parts of attapulgite and 10 to 15 parts of black manganese ore. The silicon-manganese coal ash deoxidier has rationality in formula; and the coal ash, the charcoal and the attapulgite are adopted for serving as the raw materials. The deoxidier has good deoxidizing effect; with the adoption of the deoxidier, the contents of nonmetal impurities in the steel can be reduced, the form of the impurities can be changed, the molten steel can be purified, the liquidity of the molten steel can be improved, and the molten steel continuous casting process is smooth; and the continuous casting water ports are out of nodules, thus the continuous casting can be smoothly carried out, the service performance and the service life of steel can be improved and prolonged, and the cost of steelmaking can be reduced.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a silicon-manganese fly ash deoxidizer for steelmaking and a preparation method thereof. Background technique [0002] At present, the deoxidizers used in the domestic industrial steelmaking production process are mainly calcium, aluminum or iron alloys, etc. The deoxidation effect has always reached the level of 60-100PPM, and the effect is average. It is observed that there are large bubbles and slag inclusions in the section of the slab, and the cost is high. Contents of the invention [0003] The purpose of the present invention is to provide a silicon-manganese fly ash deoxidizer for steelmaking and its preparation method. The formula of the present invention is reasonable, using fly ash, charcoal and attapulgite as raw materials, the deoxidation effect is obvious, and the steel can be quickly deoxidized. Deoxidation treatment can effectively remove inclusions in molt...

Claims

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Application Information

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IPC IPC(8): C21C7/06
Inventor 吴大宏童振兰
Owner 芜湖县天海耐火炉料有限公司
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