What is the Function of a Crucible?

What is the Function of a Crucible?

A crucible is a cup-shaped container used in laboratories for heating solids at high temperatures. Crucibles are made from three main types of raw materials: crystalline natural graphite, plastic refractory clay, and calcined hard kaolin-based sintered clay. Since 2008, high-temperature-resistant synthetic materials such as silicon carbide, alumina, corundum, and ferrosilicon have been used for crucible sintered clay. This type of clinker significantly improves the quality of crucibles, increasing their density and mechanical strength.

Functions of the Crucible:

1. The crucible is a crucial medium for the effective energy transfer between the induction coil and the liquid, ensuring the conversion of electromagnetic field energy into heat, a fundamental condition for metal smelting.

2. The crucible acts as an insulator between the induction coil and the molten steel, and between the molten steel and the induction coil.

3. The crucible withstands various stresses, including the gravity of the charge or molten steel, thermal stress, and electromagnetic forces.

4. The crucible acts as a heat insulator, reducing heat loss and ensuring the highest temperatures for smelting and refining, ensuring smooth smelting.

5. The crucible withstands the chemical attack of high-temperature molten steel and the hot melt, maintaining excellent stability and providing a stable environment for smelting.