Features of Graphite Crucible
1. Good thermal stability: Special formula targeting the shock heating and shock cooling use conditions of graphite crucible
2. Good corrosion resistance and impact resistance performance can ensure the reliability of product quality.
3. Good resistance to strong acid and alkali
4. Good thermal conductivity can greatly shorten the melting time and save energy.
5. The ash content of graphite crucible is less than 300pp, which can ensure that precious metal is free from pollution during smelting
Graphite Crucible for Metal Smelting
Graphite crucible has excellent wear resistance, thermal conductivity and electrical conductivity, etc. Using this graphite crucible can improve service life, reduce current consumption, save energy and reduce system load.
Newland graphite crucible, refined from natural quality graphite, is characterized by good thermal conductivity, high temperature resistance, small thermal expansion coefficient in high temperature environment, shock heating and shock cooling resistance, acid and alkali resistance, and excellent chemical stability. With many varieties and full specifications, the product is widely used in metallurgy, machinery, chemical, foundry and other industrial sectors, and has been most widely applied in the smelting of alloy tool steel, non-ferrous metals and alloys.
Notes
1. Graphite crucible should be kept away from humid environment, and must be stored in a dry place or on a wooden shelf.
2. Handle it with care. Falling or shaking is strictly forbidden.
3. Roast it in drying equipment or by a furnace before use, wait till its temperature gradually rises to 500°C.
4. Crucible should be placed below the mouth of furnace to prevent the furnace lid abrading the upper edge of the crucible.
5. Feed materials according to the smelting capacity of crucible. It is not allowed to feed too many materials, in order to avoid crucible swelling.
6. The furnace discharging tools and clamps should comply with the shape of the crucible, and use the tools to clamp the middle section of the crucible to prevent local stress from damaging the crucible.
7. Knock the crucible gently while removing slags and sticky cokes on the internal and external wall of the crucible. Don’t strike it heavily.
8. Keep appropriate distance between the crucible and the furnace wall. The crucible should be placed in the middle of the furnace.
9. Excessive use of combustion improver and additives will reduce the service life of crucible.
10. Rotate the crucible every week to extend its service life.
11. Prevent strong oxidation flame from reaching the side and bottom of the crucible directly.
Newland graphite crucible, refined from natural quality graphite, is characterized by good thermal conductivity, high temperature resistance, small thermal expansion coefficient in high temperature environment, shock heating and shock cooling resistance, acid and alkali resistance, and excellent chemical stability. With many varieties and full specifications, the product is widely used in metallurgy, machinery, chemical, foundry and other industrial sectors, and has been most widely applied in the smelting of alloy tool steel, non-ferrous metals and alloys.
Graphite Gold Smelting Crucible
Production: Φ350 anode canister, Φ300 anode canister and crucible, Φ540*Φ750 large gold crucible, and small high-purity graphite crucible for gold and silver ornaments. It is widely used in the rare earth industry and gold smelting industry.
High-purity Graphite Crucible for Gold Smelting
Pay attention to the following notes while using the product:
1. Graphite crucible cannot be exposed in moisture, and must be placed in indoor dry place or wooden shelf. Maintain ventilated. Moisture is strictly prohibited. Damped crucible is likely to crack.
2. Each crucible, especially damped ones, must be preheated and roasted in drying equipment or next to a ground furnace before use. The roasting temperature should start from a low temperature of 100°C below. Roast it to 150°C at a speed of not higher than 30°C per hour. Preserve the heat for about 8 hours and then dry it. The crucible dried next to a ground furnace should be placed at least for one shift, and often turned to change direction, till workers feel the internal wall of crucible is hot.
3. The melting time for the first time should be at least twice of the normal melting time, in order to avoid cracking inside the crucible due to heating up too fast, or even cracking immediately when the fire sets on.
4. Handle with care. Falling or shaking is strictly forbidden in order to present cracking. Crucible should be placed below the mouth of furnace to prevent the furnace lid abrading the upper edge of the crucible and thus affecting the capacity.
5. Pour out the remaining cold metals inside the crucible after use, and then add new materials. Carefully and gently add new materials into the crucible. Feed materials according to the capacity of crucible. It is not allowed to feed too many materials, in order to prevent crucible from swelling or bursting.
6. Knock gently to remove slags and cokes on the internal and external wall of the crucible. Avoid damaging the crucible body.
7. In the melting process, do not add chloride solvents in order not to corrode the crucible. For the furnace that uses oil and coal gas as fuels, the oil wind should not reach one part of the crucible directly. Turn around the crucible from time to time, in order to avoid local damage.
8. Clamps and other discharging tools should comply with the shape of the crucible. During furnace discharging, remove the cokes on the external wall of the crucible, and lower the furnace temperature; do not discharge at high temperature after stopping blasting. Clamp the upper and middle parts instead of the top of the crucible in order not to damage the crucible. Graphite crucible is used mainly to melt gold, silver and other precious metals.
