Production method of high rare earth lanthanum calcium calcium iron alloy

Abstract

The invention discloses a production method of a silicon, calcium and iron alloy with high rare earth lanthanum. The production process comprises the following steps: preparation, smelting, pouring, crushing and packaging. The raw material comprises the components in percentage by mass: 30-32% of rare earth metal lanthanum, 58-65% of silicon and calcium alloy and 5-10% of waste steel. The chemical components of the silicon, calcium and iron alloy with high rare earth lanthanum produced comprise the components in percentage by weight: 27-31% of La, 34-40% of Si, 16-30% of Ca and 9.6-14.1% of Fe.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a production method of a high rare earth lanthanum-silicon-calcium-iron alloy. Background technique [0002] In the field of iron and steel materials, the role of rare earths as microalloying elements in steel has been increasingly concerned and widely used. The addition of rare earth to steel has the functions of purifying molten steel, denaturing inclusions, purifying grain boundaries, etc., and can effectively improve the plasticity, toughness, corrosion resistance and other properties of steel. [0003] At present, there are three typical methods for adding rare earth to steel. One is to feed mixed rare earth cored wire through a wire feeder during ladle refining. This method has a low rare earth yield of only about 5%. The role of rare earth in steel is not obvious. The second is to use the wire feeder to feed the mixed rare earth metal wire into the crystallizer or tun...

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Problems solved by technology

The second is to use the wire feeder to feed the mixed rare earth metal wire into the crystallizer or tundish during the continuous casting process. This method has a high recovery rate of rare earth, which can reach 50%, but the distribution of rare earth in the steel is uneven, and rare earth inclusions There are many substances that affect the role of rare earth in steel

[0007] The disadvantages of the above two methods are high energy consumption, heavy pollution, and many impurities in alloy products, which are not suitable for the production of refined rare earth alloys.

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