High temperature Graphite Crucible
Graphite crucible is made by our high quality graphite block and
widely used in all kinds of furnace to melting, such as jewelry,
gold, silver, copper, brass, iron, aluminum, zinc, lead and so on.
The size is as your requirement. Our crucible own the follow
characteristic: high strength, high purity, high temperature
resistance, high machining capabilities, high precise machining,
high temperature shock resistance.
Our graphite crucible will according to your application and give
you the best suggestion and material. The material content
vibrating forming graphite, moulded forming graphite, extruded
forming graphite, isostatic forming graphite. So we are not only
supplying the graphite product, but also graphite solutions for
you.
technical parameters :
| Bulk Density | g/cc | 1.70-1.88 |
| Specific Resistance | μΩ.m | 6.0-15.0 |
| Compressive Strength | MPa | 30-80 |
| Bending Strength | MPa | 20-45 |
| Shore hardness | | 30-70 |
| C.T.E.(100-600°C) | x10-6 /°C | 2.5-5.5 |
| Ash | % | 0.01-0.2 |
| Maximum Grain Size | mm | 0.044-0.1 |
Heating Method
Preheating: in order to remove the moisture inside crucible, please
preheat the crucible approaching to furnace 4-12 hours, or burning
wood inside the crucible for 2 hours.
Make sure the drying time long enough in order to preheat and
remove moisture, avoid cracks, make working service life longer
Instruction of the graphite crucible
1. The crucibles should be put on the pallets instead of the ground
and stored in a dry place with good ventilation.
2. The crucibles should be carried on the special transport
machine, so. Please don’t roll the crucible directly.
3. Use the proper base to support the crucibles. Attention! The
base should be with a bigger diameter than the crucibles’ bottom
and with the same material as the crucibles’.
4. Don’t pack the crucibles too tightly
5. Allow the crucibles have enough expansion and extraction space.
6. Avoid high pressure on the crucibles’ top
7. The furnace cover should not be pressed on the crucibles’ top.
8. Make sure the furnace lining works well and repair it if there
is damage,
9. Make sure the crucible and furnaces are concentric.
10. Don’t throw or drop metal ingot into the crucible is forbidden;
use pincers to put the metal into crucible carefully
Application :
1. )Graphite crucible can be used for non-ferrous metal smelting
and casting, dissolving gold
or silver ornaments, analysis of special type steel, sintering hard
metal.
2.) graphite crucible for smelting gold is specialized in melting
gold in headgear and jewelryindustry. That requests graphite
material has high density and purity, ablation-resistance, and it
can be used many times. We can machine various crucibles
accordingto customer's requirement.
3. )Machined from high pure graphite and widely used in the
gold,silver,platinum and other noble metal's melting.If it's used
in oxygen atmosphere,it wil start to be oxygenized when the
temperature is higher than 700-800°c. If it's used in the
protective atmosphere, it can stand more than 2000°c.
4. )widely used in such fields as industrial furnaces,
mono-crystalline silicon machinery, mono-crystalline silicon
machinery, electron, semi-conductor, metallurgy, oil, chemistry,
textile, electrical machinery, electrical equipment, electrical
furnace, traffic, communication industry, medicine, etc
