A treatment method for continuous casting hot steel slag

Abstract

The invention discloses a treatment method for continuous casting of thermal steel slag, which is applied to molten steel smelting processes. A molten steel smelting flow is as follows: passing through an electric furnace, an LF (ladle furnace), and a VD (Vacuum Degassing) furnace, and performing continuous casting; the treatment method comprises the following step of: recycling thermal refined steel slag remained by continuous casting steel to a next ladle of molten steel, and taking the thermal refined steel slag as refining slag for recycling. After the technical scheme is adopted, in the premise of guaranteeing the quality of the refined molten steel, slag-making materials, such as lime and fluorite are saved, the smelting time is shortened and the power consumption is reduced, the losses of electrodes and refractory materials are reduced, the consumption of steel and iron is decreased, thus the production cost is reduced; meanwhile, the rapid refined slagging is promoted, the refined treatment cycle is shortened, the corrosion of an electric arc on a steel ladle wall refractory material is reduced during heating, the service life of a steel ladle is prolonged, and the pollution of thermal steel slag to an environment after ladle pouring is reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgical industry production and relates to a new technology for recycling hot steel slag in continuous casting production. More specifically, the present invention relates to a treatment method for continuous casting hot steel slag. Background technique [0002] The hot steel slag remaining in the ladle after continuous casting of molten steel. In the prior art, the treatment of hot slag is to pour it into a slag basin to cool and then transport it to a slag yard for disposal. However, hot slag contains a large amount of CaO, which is necessary for steelmaking, and carries a large amount of heat. If it is discarded directly, it will not only cause energy waste, but also cause serious pollution to the environment. [0003] Practice has proved that returning the hot slag to the refining process can not only solve the above problems but also reduce the consumption of LF slagging material, save the sl...

AI Technical Summary

Problems solved by technology

However, hot slag contains a large amount of CaO, which is necessary for steelmaking, and carries a large amount of heat. If it is discarded directly, it will not only cause energy waste, but also cause serious pollution to the environment.