Graphite Crucible
Graphite crucibles are essential vessels used for melting, refining, and holding non-ferrous metals and their alloys. They come in various types depending on the manufacturing process, including natural graphite crucibles, artificial graphite crucibles, high-purity graphite crucibles, and carbon crucibles.
Physical and Chemical Properties of Crucibles
| Item | Type I (Crucibles for melting copper, precious metals, and rare earth alloys) | Type II (Crucibles for melting aluminum and low melting point metals) |
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| Molding Method | Plastic Molding(S) | Isostatic Pressing Molding(D) | Plastic Molding(S) | Isostatic Pressing Molding(D) |
| Carbon Content (%) | ≥38 | ≥45 | ≥38 | ≥45 |
| Bulk Density (g/cm³) | ≥1.70 | ≥1.85 | ≥1.70 | ≥1.85 |
| Apparent Porosity (%) | ≤29 | ≤21 | ≤29 | ≤21 |
| Cold Compression Strength (MPa) | ≥20 | ≥25 | ≥20 | ≥25 |
| Refractoriness (℃) | ≥1500 | ≥1500 | ≥1400 | ≥1400 |
CAD Diagram of Graphite Crucible Structure
Main Dimensions For Standard Graphite Crucible
| Model | Top Outer Diameter（A） ±2% | Rim Thickness（B） | Bottom Outer Diameter（C） ±2% | External Height（H） ±2% |
| 1# | 67mm | 8mm (+1.0mm,-1.0mm) | 35mm | 65mm |
| 1.5# | 78mm | 10mm (+1.0mm,-1.0mm) | 60mm | 80mm |
| 2# | 88mm | 10mm (+1.0mm,-1.0mm) | 62mm | 100mm |
| 3# | 100mm | 12mm (+1.0mm,-1.0mm) | 75mm | 115mm |
| 4# | 115mm | 12mm (+1.0mm,-1.0mm) | 85mm | 115mm |
| 5# | 122mm | 13mm (+1.0mm,-1.0mm) | 85mm | 138mm |
| 6# | 125mm | 14mm (+1.0mm,-1.0mm) | 85mm | 155mm |
| 41# | 215mm | 20mm (+1.5mm,-1.0mm) | 150mm | 290mm |
| 45# | 250mm | 20mm (+1.5mm,-1.0mm) | 180mm | 295mm |
| 70# | 285mm | 20mm (+1.5mm,-1.0mm) | 215mm | 245mm |
| 80# | 310mm | 21mm (+1.5mm,-1.0mm) | 210mm | 370mm |
| 90# | 320mm | 22mm (+1.5mm,-1.0mm) | 230mm | 385mm |
| 100# | 314mm | 22mm (+1.5mm,-1.0mm) | 220mm | 408mm |
| 200# | 400mm | 24mm (+1.5mm,-1.0mm) | 290mm | 475mm |
| 260# | 416mm | 25mm (+1.5mm,-1.0mm) | 250mm | 585mm |
| 300# | 452mm | 27mm (+2.0mm,-1.0mm) | 310mm | 580mm |
| 360# | 462mm | 29mm (+2.0mm,-1.0mm) | 342mm | 674mm |
| 390# | 530mm | 29mm (+2.0mm,-1.0mm) | 410mm | 560mm |
| 400# | 515mm | 30mm (+2.0mm,-1.0mm) | 340mm | 600mm |
| 420# | 515mm | 30mm (+2.0mm,-1.0mm) | 330mm | 673mm |
| 440# | 620mm | 30mm (+2.0mm,-1.0mm) | 340mm | 500mm |
| 450# | 516mm | 33mm (+2.0mm,-1.0mm) | 340mm | 710mm |
| 530# | 580mm | 32mm (+2.0mm,-1.0mm) | 330mm | 635mm |
| 560# | 590mm | 34mm (+2.0mm,-1.0mm) | 330mm | 690mm |
| 570# | 620mm | 34mm (+2.0mm,-1.0mm) | 335mm | 570mm |
| 580# | 545mm | 34mm (+2.0mm,-1.0mm) | 317mm | 750mm |
| 610# | 607mm | 35mm (+3.0mm,-1.0mm) | 350mm | 630mm |
| 680# | 585mm | 35mm (+3.0mm,-1.0mm) | 330mm | 760mm |
| 690# | 600mm | 35mm (+3.0mm,-1.0mm) | 330mm | 805mm |
| 700# | 615mm | 35mm (+3.0mm,-1.0mm) | 350mm | 758mm |
| 840# | 700mm | 36mm (+3.0mm,-1.0mm) | 470mm | 675mm |
| 950# | 720mm | 38mm (+3.0mm,-1.0mm) | 300mm | 740mm |
| 970# | 720mm | 35mm (+3.0mm,-1.0mm) | 470mm | 730mm |
| 1100# | 715mm | 36mm (+3.0mm,-1.0mm) | 478mm | 846mm |
| 1150# | 855mm | 43mm (+3.0mm,-1.0mm) | 340mm | 677mm |
| 1200# | 780mm | 37mm (+3.0mm,-1.0mm) | 450mm | 752mm |
| 1250# | 725mm | 37mm (+3.0mm,-1.0mm) | 470mm | 905mm |
| 1500# | 784mm | 38mm (+3.0mm,-1.0mm) | 450mm | 890mm |
| 1700# | 778mm | 41mm (+3.0mm,-1.0mm) | 442mm | 1050mm |
| 2500# | 880mm | 45mm (+3.0mm,-1.0mm) | 350mm | 1150mm |