Graphite Crucible

Graphite crucible, is a crucible made of graphite, silicon carbide, clay, silica, wax stone, pitch and tar, etc. fired as raw materials. The material used for graphite crucible is made of high purity, high strength and high density graphite refractory material, which can be made into graphite crucible, graphite casting crucible and graphite oil tank through CNC processing.

Product features.

1. Good thermal stability of graphite crucible: special formula for the use conditions of graphite crucible of rapid heat and cold.

2. Good corrosion resistance and impact resistance of graphite crucible to ensure the reliability of product quality.

3. Good resistance to strong acid and alkali of graphite crucible.

4. Good heat conduction performance of graphite crucible: it can greatly shorten the melting time and save energy.

5. The ash content of graphite crucible is less than 300pp to ensure that the precious metals are not polluted in smelting.

Product use.

Graphite crucible is mainly used to melt non-ferrous metals such as purple copper, brass, gold, silver, zinc and lead and their alloys.

Note.

1. Storage: place in a dry place, not wet.

2. Handling: Handle with care and do not collide.

3. Placement: Use the correct crucible holder and make sure that the crucible base is firmly in contact.

4. Charging: Fill the crucible with ingots or scrap metal carefully, do not squeeze hard and do not insert and squeeze too closely.

5. Adding melt: Use as little melt as possible.

6. Cleaning: Keep the crucible clean, pour out the residual metal quickly at the end of the operation and remove the residue carefully.

7. Drying and preheating: If the crucible is damp, it needs to be dried slowly at a temperature below 100 °C.

8. Water removal: Remove all water around the furnace to avoid leakage causing metal and water contact to fry.

Standard graphite crucible specifications.

Model	Upper port outside diameter ±2%	Thickness	Lower bottom outside diameter ±2%	Height ±2%
1#	67	8± 1.0	35	65
1.5#	78	10± 1.0	60	80
2#	88	10± 1.0	62	100
3#	100	12± 1.0	75	115
4#	115	12± 1.0	85	115
5#	122	13± 1.0	85	138
6#	125	14 ± 1.0	85	155
41#	215	19～ 21.5	150	290
45#	250	19～ 21.5	180	295
70#	285	19～ 21.5	215	245
80#	310	20～ 22.5	210	370
90#	320	21～ 23.5	230	385
100#	314	21～ 23.5	220	408
200#	400	23～ 25.5	290	475
260#	416	24～ 26.5	250	585
300#	452	26～ 29	310	580
360#	462	28～ 31	342	674
390#	530	28～ 31	410	560
400#	515	29～ 32	340	600
420#	515	29～ 32	330	673
440#	620	29～ 32	340	500
450#	516	32～ 35	340	710
530#	580	31～ 34	330	635
560#	590	33～ 36	330	690
570#	620	33～ 36	335	570
580#	545	33～ 36	317	750
610#	607	34～ 38	350	630
680#	585	34～ 38	330	760
690#	600	34～ 38	330	805
700#	615	34～ 38	350	758
840#	700	35～ 39	470	675
950#	720	37～ 41	300	740
970#	720	34～ 38	470	730
1100#	715	35～ 39	478	846
1150#	855	42～ 46	340	677
1200#	780	36～ 40	450	752
1250#	725	36～ 40	470	905
1500#	784	37～ 41	450	890
1700#	778	40～ 44	442	1050
2500#	880	44～ 48	350	1150

Note: Standard type graphite crucible specifications refer to the national standard GB/T 26279-2010.

Graphite Crucible Performance Index

Item	Ⅰ		Ⅱ		Test Method
Forming method	Plasticity (S)	Isostatic pressure (D)	Plasticity (S)	Isostatic pressure(D)
Carbon content /%	≥ 38	≥ 45	≥ 38	≥ 45	GB/T 1655-2008
Bulk density /(g/cm3)	≥ 1.70	≥ 1.85	≥ 1.70	≥ 1.85	GB/T 2997-2000
Porosity /%	≤ 29	≤ 21	≤ 29	≤ 21	GB/T 2997-2000
Normal temperature compressive strength /MPa	≥ 20	≥ 25	≥ 20	≥ 25	GB/T 5072.2-2004
Fire resistance / ℃	≥ 1500	≥ 1500	≥ 1400	≥ 1400	GB/T 7322-2007； Antioxidant glaze coating