High Pure Graphite Crucible for Gold/Silver/Copper/Platinum

1. Overview of Graphite Crucible

Graphite crucible, is a crystalline form of natural graphite as the main raw material, plastic refractory clay as binder, by cooperate with different types of clinker is mainly used in smelting made of special alloy steel, refractory graphite crucible melting non-ferrous metals and their alloys.

Therefore it keeps its original natural right ink of various physical and chemical properties: it has good thermal conductivity and high temperature resistance, at high temperature in use process, small thermal expansion coefficient, the thermal shock, quenching has certain strain resistance.Of acid and alkaline solution of strong corrosion resistance, excellent chemical stability.

2. Advantages of Graphite Crucible:

a. Thermal stability: We make special design to assure the quality according to the instant temperature changing working condition.

b. Corrosion resistance: Precise design extends the ability of corrosion resistance of the crucible.

c. Impulsion resistance: graphite crucible can stand very strong heat impulsion, so it can be freely used in any technique process.

d. Acid resistance: Impregnation of special stuff can improve the quality of the crucible and its acid resistance. As a result, it can prolong the work life of the graphite crucible.

e. Fine thermal conductivity: High content of fixed carbon ensures the good thermal conductivity, shorten the dissolving time and lower the cost of the oil and other energy obviously.

f. Control of metallic pollution: Strict control of the contents assures that there is no pollution to the metal during dissolving.

g. Quality stability: High-pressure manufacturing method and quality control system can pledge the quality stability better.

3. Molding of Graphite Crucible

There are three kinds of methods, the original old forming method is a hand forming.The second is plastic molding in The third is pressed displayed.

4. Attention of Graphite Crucible

--Put the graphite crucible to dry place after using, avoid by all means rain intrusion; Before use will only be using slow roasted to 500 degrees Celsius;

--should according to the capacity of crucible material, avoid is packed too tight, so as to avoid the metal thermal expansion burst crucible;

--When taking out the metal liquid, had better use spoons scooped out, use less as far as possible calipers, if use caliper tool should be consistent with crucible shapes, such as avoiding local force is too large and shorten service life;

--The service life of graphite crucible is associated with usage. So you should avoid strong oxidation flame spray directly onto the crucible, and make the crucible material oxidation short-lived.

5. Application Industry