Molten steel calcium treatment process and its equipment

Abstract

The invention discloses a molten steel calcium treatment process and equipment thereof. The process comprises the following steps: 1) heating up and vacuuming; 2) alloying; 3) calcium treatment. The equipment includes a vacuum induction furnace, the vacuum induction furnace includes a vacuum chamber, a swing arm is arranged on the side wall of the vacuum chamber, an induction furnace is arranged in the vacuum chamber, the induction furnace is fixedly connected with the swing arm, the The top of the vacuum chamber is provided with a sealed furnace cover, and the sealed furnace cover is provided with a motor and a stirring rod. The bottom end of the stirring rod extends into the induction furnace, and the bottom end of the stirring rod is connected with a stirring head. The power input end of the stirring rod is connected with the motor. The smelting process of the present invention is sealed in a vacuum chamber, which can effectively prevent the oxidation and burning of the alloy, and has a high yield; the mechanical stirring method creates good dynamic conditions for the uniformity of calcium treatment, and significantly improves the calcium treatment of molten steel Effect; the whole operation process is completed in the vacuum chamber, which is isolated from the test operators, and the safety is better.

Description

technical field [0001] The invention relates to molten steel treatment technology in the metallurgical industry, in particular to a molten steel calcium treatment process and equipment thereof. Background technique [0002] Low-carbon aluminum-killed steel is widely used in the fields of automobiles, home appliances and engineering. Aluminum is a strong deoxidizer and an important deoxidizer in the smelting and production of low-carbon aluminum killed steel. Al exists in the molten steel of aluminum deoxidation 2 o 3 Inclusion, Al 2 o 3 The inclusions have a high melting point and are solid in the middle range of molten steel. They are easy to accumulate at the nozzle during continuous casting production, causing nozzle blockage and ultimately affecting product quality. Therefore, how to control the aluminum deoxidation product so that it can float in a large amount in the mid-range liquid state of the molten steel can not only eliminate the clogging of the nozzle and e...

AI Technical Summary

Problems solved by technology

The vacuum induction furnace is a vacuum smelting equipment that uses the principle of intermediate frequency induction heating under vacuum conditions to melt metals. The existing vacuum induction furnace cannot guarantee the efficiency and uniformity of calcium treatment, and cannot realize calcium treatment in the furnace. It is often used in Melting and smelting of steel and various alloys in small batches under high-precision control conditions

[0004] The existing calcium treatment process mainly has the following problems: 1) Calcium alloy is severely oxidized and burned, and the yield is not high; 2) Splashing occurs during the stirring process, the site environment is harsh, and the safety is poor

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