In the Continuous Casting Process, How to Accurately Control the Temperature of Molten Steel?

Posted by Luoyang Judian
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Feb 14, 2023
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In the continuous casting process, the temperature of molten steel has a great influence on the entire production line. Therefore, we must strictly and accurately control the temperature of molten steel to ensure normal production. So, how to accurately control the temperature of molten steel? Today, Luoyang Judian introduces several methods for your reference.

1. Establish a converter heat balance system

The heat balance in the furnace is the basis for the stable production of the converter, and it is also the prerequisite for the stable and smooth operation of the subsequent process. If the heat balance in the furnace cannot be guaranteed, low-temperature molten steel will easily occur when the heat is insufficient.

2. Do a good job in furnace-type Control

A reasonable furnace type is not only a necessary condition for the normal production of the converter but also an important means to promote the progress of economic and technical indicators. When the furnace type is not good, the agitation of the liquid medium in the molten pool cannot meet the requirements, which will produce a series of adverse effects.

The key parameters of furnace type control include furnace bottom height, liquid level height, furnace mouth diameter, furnace wall thickness, furnace bottom thickness, furnace shape, etc. Only when the furnace type is normal can the process be stable and the metallurgical effect of the converter can be fully exerted.

3. Ladle cover

Whole-process capping refers to the automatic capping and uncovering of the ladle during the circulation of each process. It ensures that the ladle is always covered in each link, reducing heat loss at the mouth of the ladle. Its thermal insulation effect is remarkable, which can effectively reduce the temperature drop in the process, and is the key to realizing the low temperature, constant speed, and fast casting technology of high-efficiency continuous casting machines. The whole-process capping technology realizes molten steel casting with low superheat, ensures stable billet quality, and reduces the accident rate of continuous casting machines.

4. Improve ladle and Tundish Masonry Process

During the production cycle of a furnace of steel, the storage time of molten steel in the ladle is as long as 30 minutes or more. The heat loss of molten steel in the ladle is mainly the heat loss of the mouth of the ladle and the heat dissipation of the ladle wall. The mouth of the bag can be added with an insulating agent or covered to reduce heat loss. By improving the ladle masonry process and adding thermal insulation fiber or thermal insulation felt to the ladle refractory layer, the temperature drop of the ladle wall can be effectively reduced.

5. Strengthen the Control of Process Details

In steelmaking production, molten steel goes through many processes, and any small link out of control will cause the temperature control system to fail. First of all, it is necessary to strengthen the maintenance of the tapping hole. The molten steel is discharged from the converter into the ladle, and the shape, size, tapping time of the tapping hole, and the shape of the steel flow have a great influence on the temperature drop of the tapping.

The above are several methods for accurately controlling the temperature of molten steel introduced by Luoyang Judian. Hope these methods can help you.

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