Features: commonly used in ultra-high temperature furnace within 3000 ℃, for carbonization and graphitization of carbon materials of various experiments, carbonization pilot production of carbon materials, graphitized; carbon fiber filaments and other shaped graphitized carbon may be in sintering and melting of the material environment. Commonly used in the treatment of battery materials, graphite modification, preparation of high modulus fibers. Maximum operating temperature: 3000 ℃, commonly temperature 2800 ℃, vertical temperature zone φ200 × 350mm; φ110 × 900mm horizontal temperature zone temperature uniformity: ≤ ± 15 ℃; Temperature accuracy: ± 1 ℃ working atmosphere: vacuum replacement Ar2, N2 protection (positive pressure) Temperature measurement: infrared optical temperature measurement, temperature range 1000 ~ 3000 ℃; temperature measurement accuracy: 0.3%; units KGPS-60 KGPS -100 KGPS -160 KGPS -200 KGPS -250 crucible effective volume ( diameter × height) mm Φ50 × 300 Φ200 × 350 Φ300 × 500 Φ400 × 750 Φ500 × 1000 IF Power Kw 60 100 160 200 250 IF power frequency Hz 8000 4000 4000 2500 2000 maximum working temperature ℃ 3200 3000 3000 3000 2600 ultimate vacuum Pa 1.2 × 10-1 1.2 × 10-1 1.2 × 10-1 1.2 × 10-1 1.2 × 10-1 pressure rise rate Pa / h 2 2 2 2 2 temperature zone temperature difference ℃ ± 10 ± 10 ± 10 ± 15 ± 15