How to deal with the slag in the induction smelting furnace?

Oct 09, 2022

Our equipment is also called medium frequency induction furnace. During the use of the furnace, there will be slag sticking. If no solution is taken, the hot slag particles will contact the furnace wall and lining, which will lead to the thicker slag sticking on the furnace wall, the smaller the capacity of the smelting furnace, and the lower the smelting efficiency,

Cause serious consequences.

Now Luoyang Shennai will introduce you some knowledge about slag sticking treatment of smelting furnace.

Causes of Slag Sticking in Smelting Furnace

The oxides and non-metallic impurities in the charge are difficult to dissolve in the molten metal. When the induction furnace is working, the induced current will form a great stirring force on the metal melt, and the slag particles suspended in it will gradually grow up under such strong stirring effect, and the buoyancy it receives will also gradually increase. When buoyancy

When it is greater than the stirring force, the grown slag particles will float into the surface of the molten liquid.

Slag particles gradually approach the furnace wall under the action of strong stirring and centrifugal force. Because the temperature of furnace lining is relatively low, the melting point of slag particles is relatively high. When the furnace lining temperature is lower than the solidification temperature of slag particles, the slag will be attached to the furnace lining and condensed into solid state. The higher the solidification temperature of slag, the easier it is to be

The furnace lining is cooled, and finally sticky slag is formed on the furnace wall.

Is there any good solution to the sticky slag in the smelting furnace?

One is the mechanical breaking method. After the slag on the furnace lining appears, the slag on the furnace lining is scraped off by mechanical means, such as shovels, iron rods, etc. Of course, when the workers scrape the slag, in order to ensure the operation safety, the sticky slag can be easily scraped, which will increase the smelting temperature. High temperature may lead to furnace lining

The service life of the smelting furnace will be affected due to the damage of. Therefore, the mechanical breaking method will increase the power consumption of the smelting furnace.

The other is chemical method. According to the principle of slag formation, change the formation mechanism of slag adhesion to fundamentally remove the possibility of slag adhesion on the furnace lining. The chemical breaking method uses this principle to change the performance of the slag and reduce its melting point by adding some additives. If the solidification temperature of slag particles is low

At the furnace lining temperature, even if it contacts with the furnace lining during floating, the slag particles will not solidify on the furnace wall to form sticky slag.

Pay attention to the following points when cleaning up the slag sticking on the furnace:

1. For continuous production furnace type, each shift shall be cleaned once. After 5~15 heats of smelting, the smelting furnace shall be thoroughly cleaned once;

2. When changing alloy varieties, the furnace body shall be thoroughly cleaned once;

3. In order to effectively remove the residue, the slag remover shall be evenly sprinkled into the furnace before cleaning, and the temperature shall be raised to about 800 ℃. The slags in the furnace shall be thoroughly cleaned by flat shovel or slag raking car.

The above is the answer to the problem of how to deal with the slag sticking in the furnace. Welcome to Luoyang Shennai to learn more about the electric furnace.