Production method of rare earth aluminum manganese calcium iron alloy

Abstract

The invention discloses a rare earth aluminum manganese calcium iron alloy and a production method thereof, belonging to the technical field of steel smelting deoxidier. The alloy comprises the following components by weight percent: 40-70% of Al, 5-20% of Mn, 1-10% of RE, 1-3% of Ca, not less than 5% of other residual elements, and the balance of Fe, wherein, the RE is rare-earth Ce, La or at least contains one mixed rare earth of Ce and La; the content of Ce and La in the mixed rare earth is not less than 90%; other residual elements are the mixed elements of carbon, sulfur, phosphorus and silicon in the alloy smelting process; and the preparation process flows are as follows: selecting materials, preparing the materials, charging, melting, deslagging, pouring, weighing and storing into a warehouse. The invention has the advantages of realizing strong deoxidation effect and high functional element yield; the rare earth aluminum manganese calcium iron alloy is easily removed as the impurity particle generated in the molten steel is large, is not only the strong deoxidizer, but also an additive of the alloy, and also can be used as intermediate alloy.

Description

technical field [0001] The invention belongs to the technical field of deoxidizers for steelmaking, and in particular provides a rare earth aluminum-manganese-calcium-iron alloy and a production method thereof. Background technique [0002] Deoxidation is an important process link in the steelmaking process. The choice and amount of deoxidizer are related to the control of the converter smelting end point, the denaturation of steel slag, the requirements for components, the denaturation treatment of inclusions and the change of continuous casting casting performance. In addition, the nature, shape and quantity of deoxidation products (mainly oxides and sulfides) will have a great impact on the mechanical and physical and chemical properties of steel. In the actual production process, some solid solvents need to be sprayed into molten steel. That is, denaturants, such as silicon-calcium, rare earth alloys, etc., change the properties of non-metallic inclusions solidified in ...

AI Technical Summary

Problems solved by technology

Although the advantages of rare earths have been widely recognized by people, the use of rare earths in steelmaking plants faces the following difficulties: (1) rare earths are easily oxidized and difficult to add to steel, resulting in a low yield of rare earths; (2) the addition of rare earths (3) The proportion of rare earth inclusions generated is large, and it is difficult to float up from the molten steel; (4) It is easy to produce nozzle nodules during casting, and it is difficult to ensure the smooth progress of continuous casting production, etc.

The existence of these problems limits the enthusiasm of enterprises for rare earth applications

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