A kind of vd furnace with molten steel temperature control device and control method thereof

Abstract

The embodiment of the invention discloses a VD furnace with a molten steel temperature control device and a control method of the VD furnace. The VD furnace comprises a steel ladle. A cavity is formed between a lining and a shell of the steel ladle. The cavity is internally provided with an air inlet pipe, an air outlet pipe and two or more first temperature sensors. A first injection pipe and two or more second injection pipes are arranged at the bottom of the inner side of the steel ladle. A third injection pipe is further arranged on the side wall of the inner side of the steel ladle. Heaters are arranged in the first injection pipe, the second injection pipes and the third injection pipe. A vacuum tank is further arranged on the outer side of the steel ladle and provided with a controller and a second temperature sensor used for detecting the temperature of molten steel in the steel ladle. According to the above technical scheme and the VD furnace and the control method thereof in the embodiment, the temperature in the VD furnace is actively regulated and controlled, the control precision for the temperature of molten steel discharged out of the furnace is improved, the reaction speed for the temperature of molten steel discharged out of the furnace is increased, and therefore it can be guaranteed that the pouring temperature is in the optimal target value range.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to a VD furnace with a molten steel temperature control device and a control method thereof. Background technique [0002] VD furnace (vacuum decarburization furnace, vacuum degassing furnace) can carry out vacuum degassing treatment on molten steel, fine-tune the alloy composition and argon stirring under vacuum, and is an important smelting equipment in the iron and steel smelting process. Usually, in order to ensure the quality of the molten steel produced by the VD furnace, it is necessary to adopt a high-temperature tapping method (controlling the temperature of the molten steel in a relatively high temperature range) when tapping the VD furnace. Although high-temperature tapping can guarantee the quality of molten steel, the higher the temperature of the molten steel out of the furnace, the greater the harm it will bring. For example, as the temperature of the molten steel o...

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Problems solved by technology

[0004] The embodiment of the present invention provides a VD furnace with a molten steel temperature control device and its control method to solve the problem of inaccurate control of the temperature of the molten steel in the VD furnace in the prior art

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