ZQLB Series 1200°C Vacuum Atmosphere Box Furnace,3 heating zones,180° side door,SiC rod heating,supports vacuum & multiple protective atmospheres for material sintering and lab heat treatment.
The AJ-ZQLB series vacuum atmosphere box-type electric furnace, as shown in the figure, integrates a temperature control system, vacuum furnace chamber, vacuum pump, gas circuit, pressure protection, gas flow control, positive and negative pressure display, and water circulation pump. The water circulation tank and the furnace body are of a powder type. The furnace lining is made of vacuum-formed lightweight alumina material.
Electric heating elements are used as the heating elements; it is a specialized device designed for laboratories in higher education institutions and research institutes, as well as industrial and mining enterprises, for sintering, melting, analyzing, and producing ceramics, metallurgy, electronics, glass, chemicals, machinery, refractory materials, new material development, special materials, building materials, metals, non-metals, and other composite materials.
The control panel is equipped with an intelligent temperature regulator, control power switch, main heating start/stop buttons, voltage and current meters, computer interface, water pump switch, vacuum pump switch, gas flow meter, positive and negative pressure gauge, electric contact pressure gauge, and valves, so that the working status of the system can be observed at any time. This product adopts a reliable integrated circuit, provides a good working environment, and is resistant to interference. During operation, the outer shell temperature of the furnace is ≤40°C, which greatly improves the working environment. It features microcomputer program control, programmable curves, automatic heating/cooling, and the ability to modify temperature control parameters and programs during operation, making it flexible, convenient, and easy to operate.
Temperature control accuracy: ±1°C without overshoot. Constant temperature accuracy: ±5. Fast heating speed, with a heating rate of ≤45/min.
The furnace chamber material is made of vacuum-formed lightweight alumina material, which offers high operating temperature, low heat storage, resistance to rapid heating and cooling, no cracking, no slagging, and good insulation performance. The structure is reasonable, with inner and outer double-layer furnace sleeves and air-cooled heat dissipation, which can greatly shorten the experimental cycle.
| Item | Specification |
|---|---|
| Model | 900℃ Vacuum Atmosphere Furnace |
| Max. Working Temperature | 1200℃ |
| Long-term Service Temperature | 900℃ (adjustable) |
| Power Supply | 3-phase AC380V/50-60HZ |
| Heating Element | Silicon Carbide Rod |
| Heating Element Position | Left and right sides of furnace chamber |
| Temperature Sensor & Range | Type K (NiCr-NiSi) thermocouple, measuring range 0-1350℃ |
| Program Segments | 1 group:50 segments; 2 groups:22 segments; 3 groups:8 segments, adjustable |
| Heating Rate | 1℃/h ~ 20℃/min adjustable; Max.20℃/min, Min.1℃/h |
| Furnace Door Height | 1000mm from ground |
| Vacuum Range | 100Pa ~ 10⁻¹Pa |
| Pressure Condition | Micro positive pressure ≤10kPa; Vacuum pumping within 30min; Heating power not fully open, PID adjustable, equipped with digital pressure gauge |
| Temperature Zones | 3-zone design |
| Furnace Body | CNC machined, processed by polishing, grinding, pickling, phosphating, powder coating and high-temperature baking. Two-tone design, nice appearance. Anti-oxidation, acid & alkali resistant, corrosion-resistant, high temperature resistant and easy to clean. |
| Furnace Structure | Double-layer air-cooled furnace body to ensure good working environment. |
| Door Opening Method | 180° axial side-opening door |
| Water Cooling Parts | Furnace mouth, furnace door and furnace top of inner chamber; 1-inch water cooling pipe connector |
| Vacuum Pump | Two-stage direct rotary vane vacuum pump, 60m³/h pumping speed; 3-inch furnace port |
| Vacuum Gauge | Analog pressure gauge (-0.1Mpa) + digital positive & negative pressure indicator |
| Pressure Resistance | Chamber steel plate thickness:6-20mm, double-sided welding, withstand positive pressure 0.1Mpa |
| Gas Valves | Stainless steel valves |
| Pressure Detection | 1 pc dual-range analog gauge for positive & negative pressure (digital vacuum gauge optional) |
| Gas Flowmeter | 2 pcs float flowmeters |
| Overpressure Protection System | To avoid risk caused by closed or blocked exhaust port. Electric contact pressure gauge / pressure sensor sends signal to close gas inlet solenoid valve, open exhaust solenoid valve and activate sound-light alarm to release pressure and protect furnace. |
| Gas Leakage Alarm | Detects toxic and hazardous gas indoors. Automatically shut down furnace, cut gas supply and turn on exhaust when gas concentration exceeds threshold. Optional for customer |
| Permissible Atmosphere | Hydrogen, Nitrogen, Argon, Carbon Monoxide, Oxygen, etc. |
| Refractory Material | Vacuum formed alumina fiber lightweight board for lining; lightweight hollow sphere alumina board for furnace bottom and impact-prone areas. High service temperature, low heat storage, thermal shock resistance, no cracking or slag dropping, good insulation. |
| Thermal Insulation Material | 4-layer insulation: alumina fiber cotton, alumina fiber board, polycrystalline alumina fiber board, premium material with excellent energy-saving effect. |
| Furnace Shell Temperature | Shell temperature ＜45℃ under long-term continuous operation without shutdown |
| Protection Functions | Integrated module control unit, dual-loop control & dual-loop protection. Protection: overshoot, over-regulation, under-regulation, thermocouple break, phase loss, overvoltage, overcurrent, overtemperature, current feedback, soft start, etc. |
| Temperature Control | Closed-loop SCR module trigger control, phase-shift trigger. Output voltage/current/power continuously adjustable, constant voltage / constant current / constant power mode. Current as inner loop, voltage as outer loop. When sudden load or over current occurs, output current limited within rated range, protecting heating elements against heavy current/voltage impact to ensure reliable control and precision. |
| Display Parameters | Temperature, segment number, segment time, remaining time, output power percentage, voltage, current, etc. |
| Temperature Curve Setting | Intelligent temperature controller with PID, APID, MPT AI regulation, auto-tuning & self-learning, no overshoot or under-regulation. 30-segment program control, arbitrary ramp up/down, jump (cycle), run, pause, stop. Program can be modified online during operation. AI curve fitting for smooth temperature profile. |
| Multi-Curve Storage | 30-segment (customizable to 50 segments) program control. Options: 1 curve ×30(50) segments; 2 curves ×14(28) segments each; 3 curves ×9(15) segments each; 5 curves ×5(9) segments each. Multiple curves saved and freely selectable. |
| Communication Interface | RS485 interface, communication distance up to 1700m. PC remote start/stop, curve setup/read, parameter configuration. PC screen displays measured value, setpoint, output, segment No., temperature curve, power curve. Curves can be stored & modified. History curve & report logging interval:1s–1h, long-term storage. |
| Standard Accessories | 1 crucible tongs, 1 pair high-temperature gloves |
| Warranty | 1-year free warranty for furnace body. Heating elements excluded (free replacement for natural failure within 3 months) |
| Notes | 1. Recommended heating & cooling rate:10-20℃/min. Excessively fast heating shortens heating element service life.2. Minor cracks inside chamber after long use are normal and will not affect operation, which can be repaired with alumina coating.3. Prevent high-temperature solution leakage onto furnace bottom. Use supporting plate or alumina powder for isolation.4. Place equipment in well-ventilated and dry area. |
| Packing List | 1 furnace, 1 furnace door heat plug (supplied for furnaces above 1700℃), 1 crucible tongs, 1 pair high-temperature gloves, operation manual, certificate, delivery note |
| Delivery Terms | 1. Triple-layer export packaging: foam paper wrapping, plastic film, wooden case.2. Free delivery within urban area in China.3. We bear all damage during transportation.4. Transport modes: truck, railway, sea freight (export), air freight (export). Dedicated truck for nearby delivery (wood pallet + carton). |
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