Carbon and manganese alloy material and preparation method thereof and steel making method applying material

Abstract

The invention relates to a carbon and manganese alloy material and a preparation method thereof. The carbon and manganese alloy material comprises carbon (C), manganese (Mn), ferrum (Fe) and aluminum (Al), and moreover, by taking the total content of the carbon and manganese alloy material as a reference, the content of the C is 30-45 weight percent, the content of the Mn is 30-45 weight percent, the content of the Fe is 1-25 weight percent, the content of the Al is 3-10 weight percent, the content of phosphorus (P) is not greater than 0.15 weight percent, the content of sulfur (S) is not greater than 0.15 weight percent, the content of nitrogen (N) is not greater than 0.10 weight percent, and the content of moisture is not greater than 0.5 weight percent. The invention also provides a steel making method applying the carbon and manganese alloy material. By adopting the carbon and manganese alloy material prepared by the invention, molten steel can be stably recarburized or manganized, and the problems that the component of smelted steel is not stable, and the yield is low are solved. The recovery rate of carbon and the recovery rate of manganese are high and stable, and can be respectively and stably controlled to be between 90-96 percent, and moreover, the deoxidation rate of finished steel can also be simultaneously improved.

Description

technical field [0001] The invention relates to a carbon-manganese alloy material, a preparation method thereof and a steelmaking method using the carbon-manganese alloy material. Background technique [0002] For the process of converter smelting medium and high carbon steel, the addition of recarburizer is generally added with the steel flow during the tapping process, and the lower limit is used for rough adjustment, and then the carbon content is fine-tuned in the refining process to achieve the maximum value of the molten steel. carbon content requirements. Usually, the recarburizing agent used as the end point of the converter is various high-carbon materials, such as graphite, petroleum coke and anthracite, etc., and such high-carbon materials are widely used. However, the particles of this kind of recarburizing material are small, almost powdery, and their density is much smaller than that of steel slag in the furnace. When adding such recarburizing material particl...

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Problems solved by technology

However, the particles of this kind of recarburizing material are small, almost powdery, and their density is much smaller than that of steel slag in the furnace. When adding such recarburizing material particles into the ladle, dust is easily generated, causing environmental pollution, and some The particles will also be sucked out by the dust removal system; in addition, the particles of carbon-increasing materials added to the ladle float on the steel slag, and due to the high temperature in the ladle, some of the particles are burned and lost

The above reasons lead to unstable composition of smelted steel and low pass rate, etc. The recovery rate of anthracite carburizer fluctuates in a wide range, generally in the range of 65-90% by weight; at the same time, the addition of carburant introduces many associated Inclusions seriously affect the quality of molten steel; moreover, when the oxygen activity in molten steel is high, the addition of recarburizers is likely to cause strong tumbling of molten steel, and in serious cases, molten steel will be pulled out of the ladle, affecting the safety of equipment and personnel

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