Aluminum-manganese-carbon alloy ball for steelmaking deoxidization and recarburization and preparation method thereof

A technology of aluminum-manganese-carbon alloy and alloy balls, which is applied in the field of converter steelmaking, can solve problems such as environmental pollution, cost increase, and labor intensity of workers, and achieve the effects of improving environmental conditions, reducing usage, and reducing labor intensity

Inactive Publication Date: 2007-03-14
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

In addition, deoxidation is often required in the steelmaking process. At present, silicon-aluminum iron is used for deoxidation in steelmaking, and various powders and alloys are used for carburization and deoxidation. This not only increases the labor intensity of workers, pollutes the environment, but also increases the cost.

Method used

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Embodiment

[0015] Wherein the raw material ferromanganese powder used contains 63.5% manganese, the graphite powder contains 97% carbon, and the aluminum powder contains 97.5% aluminum. The actual batching addition is 52% of ferromanganese powder, 30% of graphite powder, 15.5% of aluminum powder, 1% of water glass, 0.5% of cellulose, 1% of bentonite, and mix well. Use a belt-type ball machine to press into balls with a diameter of 20-40mm, bake them in a baking oven at 180-250°C for 30-60 minutes, and seal them for storage.

[0016] Judging from the effect of using aluminum-manganese carbon balls instead of recarburizers, deoxidizers, and some ferromanganese in Longmen Iron and Steel Company, adding 1.5kg of aluminum-manganese carbon balls per ton of steel can replace 1.5kg of recarburizers per ton of steel , 0.5kg of ferrosilicon and 0.5kg of ferrosilicon manganese, the recovery rate of carbon is 98%, the recovery rate of manganese is 90%, and it is very stable, and the cost can ...

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Abstract

The present invention discloses one kind of steelmaking deoxidizing and carburizing Al-Mn-C alloy pellet and its preparation process. The lumpy alloy pellet contains Mn 30- 40 wt%, C 25-35 wt%, Al 10-20 wt%, H2O 0-1 wt%, S 0-0.35 wt% and P 0-0.3 wt%. It is used in steelmaking to reach the aims of deoxidizing and carburizing in low labor strength, less environmental pollution and low cost.

Description

technical field [0001] The invention relates to the field of converter steelmaking, in particular to carburization and deoxidation alloying after converter steelmaking. Background technique [0002] When steel-making converters smelt medium and high-carbon steels, it is generally used to add alloys and recarburizers during the tapping process with the steel flow or at the bottom of the ladle to complete the carburization and deoxidation alloying tasks. This method brings many disadvantages. First of all, because the recarburizer is granular, when the recarburizer has a large particle size, it floats on the liquid steel surface, and the carbon recovery rate is low, generally 80-90%, and the particle size is small, and it is easy to oxidize. , the carburization is unstable, and the addition amount is large, the cost is high, and the working conditions are deteriorated; secondly, the granular carburizer is easy to cause the violent boiling of the molten steel in the ladle and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C21C7/06C22C30/00
Inventor 张朝晖巨建涛池炎
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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