In precious metal smelting, crucibles are indispensable, because crucibles have good thermal conductivity and high temperature resistance, and are widely used in metallurgy, casting, machinery, chemical industry and other industrial sectors. Graphite crucibles and quartz crucibles are commonly used for smelting metals. What is the difference between these two kinds of crucibles? We can compare them from their appearance, heat resistance, heating material mode and use. Quartz crucible andGraphite crucibleDifferent colors. The following Xiaobian will share with you:

The quartz crucible is white cup-shaped, and the graphite crucible is black cup-shaped, which is very easy to distinguish.

Quartz crucible

Quartz crucible is more resistant to high temperature than graphite crucible. The maximum temperature of the intermediate frequency smelting furnace is 2600 ℃, and the quartz crucible is used; The maximum temperature of the high-frequency smelting furnace is 1600 ℃, which is matched with a graphite crucible.

Graphite crucible
The heating methods of the materials during the use of the two crucibles are different. There is no resistance in quartz. When the intermediate frequency current passes through, the metal material in the quartz crucible generates induction heat, while the quartz crucible does not generate heat. It is suitable for smelting iron, aluminum, stainless steel, platinum, gold, palladium, etc; There is resistance in graphite. When high-frequency current passes through, the graphite crucible heats metal materials through its own induction heating, which can smelt gold, silver, copper, alloy, K gold, etc. The quartz crucible can be used alone, but the graphite crucible should be used with a quartz jacket, because graphite will oxidize.

The quality of a graphite crucible is related to its material and density. A good graphite crucible has uniform oxidation, is not easy to eat gold, and leads to low production loss; Poor graphite oxidation is uneven, which will eat up the material and cause high loss. If graphite is oxidized, it is easy to become thin and even crack, so when using graphite crucible, you must put on a quartz crucible jacket, which plays a protective role. Knowing the difference between quartz crucible and graphite crucible, we can choose crucible better and more accurately when smelting metal.

After Xiaobian said this, are you right about the quartz crucible andGraphite crucibleI have a more thorough understanding.