How to Better Store Silicon‑Carbide Graphite Crucibles? There is a wide variety of crucible types and specifications. They are not restricted by production scale, batch size or the type of molten materials. Users may make arbitrary selections. Featuring strong applicability, they can guarantee the purity of molten materials.

Notes on Crucible Use:

Place in a dry area after use and avoid rain exposure; slowly bake the crucible up to 500 ℃ before use.

Load materials according to the crucible capacity. Do not pack materials too tightly, so as to prevent crucible cracking caused by thermal expansion of metals.

Scoop out molten metal with a ladle and minimize the use of calipers. If tools such as calipers are adopted, they shall match the crucible profile to avoid excessive local stress that shortens service life.

The service life of a crucible is related to its application. Avoid direct impingement of strongly oxidizing flame onto the crucible, as this will shorten its service life.

Crucible Handling

Great care must be taken when handling crucibles to well protect their glaze layers. Handle with care to prevent collision, impact or dropping. Do not transport crucibles by rolling them horizontally on the ground. Damage to the glaze layer will lead to oxidative aging of the crucible. Use padded trolleys (or other suitable handling equipment) for careful transportation.

Crucible Storage

Store crucibles in a dry environment on wooden pallets with good ventilation.

Crucibles may be stacked when placed upside‑down.

Never expose crucibles to humid conditions. Otherwise, water‑absorbed glaze layers tend to peel off during crucible preheating, reducing melting efficiency and service life. In severe cases, the crucible bottom may fall off.

Thanks to their outstanding properties, graphite crucibles are widely used in industrial sectors including metallurgy, foundry, machinery and chemical industry for smelting alloy tool steels, non‑ferrous metals and their alloys, delivering favorable technical and economic benefits.

There are three types of raw materials for crucibles:

Natural crystalline stone

Plastic refractory clay

Calcined kaolin grog

In recent years, high‑temperature‑resistant synthetic materials such as silicon carbide, alumina and ferrosilicon have been used as grog for crucibles. Such grog improves crucible quality, density and mechanical strength.

Main Applications of Graphite Crucibles:

(1) Evaporation, concentration or crystallization of solutions

(2) Combustion of solid substances

Precautions for Using Graphite Crucibles:

(1) Direct heating is permitted, but quenching after heating is forbidden. Remove the crucible with crucible tongs.

(2) Place the crucible on a clay triangle during heating.

(3) Stir during evaporation; allow residual‑heat evaporation when nearly dry.