Luoyang Anjing Intelligence Equipment are a global leader in high-temperature electric furnaces
1200°C High Temperature Vacuum Atmosphere Pit Furnace for Sintering
PRODUCT PARAMETERS
Description
1200°C Vacuum Atmosphere Pit-Type Sintering Furnace
The 1200ZQJ is a 1200°C vacuum atmosphere furnace that integrates high-temperature heating, vacuum processing, and controlled-atmosphere capabilities. It features a rated operating temperature of 1200°C, a long-term operating temperature of 1150°C, and a temperature control range of 50–1200°C. The unit utilizes high-temperature alloy resistance wire heating elements arranged around the furnace chamber, combined with high-performance thermal insulation and refractory materials, to ensure stable and uniform high-temperature heat treatment.
The equipment employs a double-layer furnace body structure with a hybrid air- and water-cooling design to effectively lower the external surface temperature. Equipped with a diffusion pump vacuum system, it achieves an ultimate vacuum of 6.6 × 10⁻⁴ Pa and supports various atmospheres—including nitrogen, argon, hydrogen, carbon monoxide, and oxygen—thereby meeting diverse process requirements such as material sintering, heat treatment, atmosphere-protected processing, and vacuum experiments.
Featuring an intelligent temperature control system and a 7-inch touchscreen, the unit supports 50-segment program control, PID regulation, and AI-based adjustment. It enables precise control over complex temperature profiles—including heating, soaking, cooling, and cycling—providing a stable and reliable heat treatment environment for scientific research, industrial production, and materials testing.
Product Features
- Deep-well furnace chamber suitable for vacuum sintering of long workpieces
With dimensions of 600mm (diameter) × 1000mm (depth), the furnace features a vertical well-type structure specifically designed for the vertical vacuum sintering of long workpieces, tubes, and rods.
- High vacuum capability via diffusion pump system
Utilizes a diffusion pump vacuum system, achieving an ultimate vacuum of 6.6 × 10⁻⁴ Pa and an operating vacuum level of 10⁻³ Pa. It is equipped with digital composite vacuum and pressure gauges, with a specified pressure rise rate of 0.66 Pa/h. A complete configuration of vacuum lines, gas lines, and valves meets the requirements of high-vacuum sintering processes.
- Dual-retort configuration made of 310S stainless steel
Equipped with two lidded retorts (inner chambers) made of 310S stainless steel with a wall thickness of 12mm; these can be removed while hot. The sealed retort design ensures a stable vacuum and atmosphere environment. The specially designed dual-retort setup facilitates alternating use, thereby increasing production efficiency.
- Peripheral heating with silicon carbide rods and corundum-mullite protective shielding
High-temperature U-shaped silicon carbide rods (constant diameter type) serve as heating elements; they are installed around the furnace perimeter and protected by corundum-mullite shields. Temperature control accuracy is ±1°C, and furnace temperature uniformity is ±1°C (depending on chamber size; multi-point control is available for large chambers). The heating rate is adjustable between 1°C/min and 20°C/min.
- Dual-mode operation (vacuum + atmosphere) with multi-gas compatibility
Achieves a vacuum level of 10⁻³ Pa and supports the introduction of various gases, including hydrogen, nitrogen, argon, carbon monoxide, and oxygen. Equipped with a digital mass flow meter for precise gas flow control.
| Gas Inlet Pipe | 1 pc |
| Temperature Measuring Element | Thermocouple graduation K, measuring range 0–1320°C (detecting the interior of the furnace liner) |
| Heating Element Installation Position | Around the furnace (using high-temperature alloy resistance wire), with corundum-mullite for collision protection |
| Temperature Control Accuracy | ±1°C (integrated circuit control, no overshoot) |
| Furnace Temperature Uniformity | ±1°C (depending on the furnace chamber size; large furnace chambers can adopt multi-point control to achieve better furnace temperature uniformity) |
| Heating Rate | Heating rate freely adjustable; adjustment range: fast heating rate 20°C per minute (20°C/min), slow heating rate 1°C per hour (1°C/h) |
| Heating Elements | High-temperature alloy resistance wire |
| Heating Element Installation or Replacement | Hoist the whole unit up, manually remove the fastening screws, separate the barrel cover, replace, and reassemble |
| Furnace Body | The furnace body is machined with CNC machine tools and manufactured through polishing, grinding, acid washing, phosphating, plastic powder spraying, high-temperature baking, etc. It features a two-tone color scheme, a novel and aesthetically pleasing appearance, and advantages such as oxidation resistance, acid and alkali resistance, corrosion resistance, high temperature resistance, and easy cleaning |
| Furnace Body Structure | The electric furnace body adopts an air-cooled double-layer structure, ensuring a good working environment |
| Inner Liner | The inner liner is sealed, made of 310S stainless steel, and can be taken out at high temperature |
| Water Cooling | Double-layer furnace shell, air cooling + water cooling |
| Water-Cooled Parts | Furnace opening, furnace door |
| Vacuum Pump and Vacuum Value | Adopts a diffusion pump vacuum unit, ultimate vacuum value 6.6×10⁻⁴ Pa |
| Vacuum Value | Pointer pressure gauge -0.1MPa |
| Vacuum Pipeline | Complete set of gas circuit and valves |
| Vacuum Gauge | Digital display composite vacuum gauge |
| Pressure Gauge | Digital display pressure gauge |
| Pressure Rise Rate | Pressure rise rate set at 0.66Pa per hour |
| Pressure Detection | Digital display pressure detection |
| Gas Flow Meter | Equipped with 1 digital display mass flow meter |
| Pressure Protection | To prevent danger caused by furnace chamber exhaust port closure, exhaust port blockage, or excessive furnace chamber pressure, this system is specially made. Principle: A signal is obtained from an electrical contact pressure gauge or pressure sensor, which drives the control module to close the electromagnetic gas inlet valve, start the electromagnetic exhaust valve and alarm, so that pressure is released from the exhaust port, with audible and visual alarm buzzer alarm, thereby protecting the normal operation of the electric furnace |
| Atmosphere Gases Available | Hydrogen, nitrogen, argon, carbon monoxide, oxygen, etc. |
| Refractory Materials | The furnace lining is made of vacuum-formed high-purity alumina lightweight material. Positions prone to collision during loading and unloading (furnace opening, furnace bottom) adopt lightweight corundum-mullite material, which has high operating temperature, small heat storage, resistance to rapid heating and cooling, no cracking, no slag falling, and good insulation performance |
| Insulation Materials | Three-layer insulation is adopted, namely: aluminum silicate fiberboard, alumina fiberboard, and alumina (polycrystalline) fiberboard |
| Furnace Body Shell Temperature | For long-term continuous operation without shutdown, the shell temperature is less than 45°C |
| Protection | An integrated modular control unit is adopted for accurate control precision, and dual-loop control and dual-loop protection are designed, featuring protection against overshoot, over-regulation, under-regulation, broken thermocouple, phase loss, overvoltage, overcurrent, overtemperature, current feedback, soft start, etc. |
| Control | Closed-loop technology is adopted for thyristor module trigger control, with phase-shift triggering or zero-crossing triggering. Output voltage, current, or power can be continuously adjusted, featuring constant voltage, constant current, or constant power characteristics. The current loop is the inner loop, and the voltage loop is the outer loop. When a load is suddenly applied or the load current exceeds the current limiting value, the output current of the voltage regulator is limited within the rated current range to ensure normal operation of the output and the voltage regulator. At the same time, the voltage loop also participates in regulation, so that the output current of the voltage regulator is limited within the rated current range, maintaining constant output current and voltage under the premise of sufficient adjustment margin. This protects the heating elements from impact of excessive current and voltage, achieving safe and reliable control effects and control precision |
| Display Parameters | Temperature, temperature segment number, segment time, remaining time, output power percentage, voltage, current, etc. |
| Buttons | Imported buttons are adopted, with a service life of more than 100,000 times, and with LED indicators |
| Temperature Curve Setting | Adopts an intelligent temperature controller, equipped with multiple adjustment modes such as standard PID, artificial intelligence adjustment APID, or MPT, with self-tuning and self-learning functions, and excellent control characteristics of no overshoot and no undershoot. It has a 30-segment program control function, can realize heating and cooling control at any slope, has programmable/operable commands such as jump (cycle), run, pause, and stop, and allows the program to be modified at any time during controlled operation; it adopts an artificial intelligence adjustment algorithm with curve fitting function, which can obtain smooth and flat curve control effects |
| Multiple Curve Input | 50-segment program control function |
| Touch Screen | 7-inch touch screen selected |
| Warranty Scope and Period | The electric furnace is provided with free warranty for one year; heating elements are not covered by warranty (free replacement for natural damage within three months); later customer-added testing fees are calculated separately |
Application Areas
- Vacuum Sintering of Long Workpieces: Suitable for the vacuum sintering and heat treatment of workpieces with high length-to-diameter ratios, such as long shafts, tubes, and rods.
- Vacuum Annealing of Metal Materials: Suitable for the vacuum annealing of materials such as tool steels, die steels, precision alloys, and superalloys, preventing oxidation and decarburization.
- Vacuum Sintering in Powder Metallurgy: Suitable for the vacuum sintering and forming of metal and alloy powders.
- Vacuum Sintering of Advanced Ceramics: Suitable for the vacuum sintering of ceramic materials such as alumina, zirconia, and silicon nitride.
- R&D of New Materials: Suitable for research into vacuum and controlled-atmosphere sintering processes for new materials, including specialty materials, composites, and nanomaterials.
Company Profile
A professional enterprise specializing in heat treatment technology services and the R&D, manufacturing, and sales of high-temperature electric furnaces.
The company focuses on developing high-temperature electric furnaces covering a full temperature range of -100℃ to 2600℃. Its products include experimental electric furnaces, vacuum atmosphere furnaces, industrial kilns, and medium-frequency induction heating equipment. Main products include box furnaces, tube furnaces, lifting furnaces, pusher kilns, bogie furnaces, rotary kilns, tunnel kilns, and various specialized medium-frequency furnaces.
The company adheres to technological innovation and has passed ISO9001 and EU CE certifications. It owns 21 registered trademarks, 29 patents, and 27 software copyrights.
Payment Methods
TT
Shipment Methods
The electric furnace is packaged in three layers: first wrapped in foam paper, then wrapped in plastic film, and finally packed in a wooden crate.
Frequently Asked Questions (FAQ)
- Can complex temperature profiles be set?
Yes. The equipment supports 50-step program control, allowing for the configuration of heating, holding, cooling, pausing, stopping, and cycling sequences. It can also execute temperature profiles with varying heating rates to meet specific process requirements.
- Does the furnace casing get very hot during operation?
The equipment features a double-walled furnace body design combined with air-cooling and water-cooling systems. During prolonged continuous operation, the temperature of the outer casing is maintained below 45°C, helping to improve the working environment around the equipment.
- Can the heating elements be replaced if damaged?
Yes. The heating elements utilize high-temperature alloy resistance wire and are designed for easy removal and replacement. Replacement involves lifting the relevant furnace components and removing the fastening screws.
- What safety protection features does the equipment have?
The equipment utilizes dual-circuit control and protection, featuring safeguards against over-temperature, over-pressure, over-current, phase loss, thermocouple breakage, and current feedback issues, as well as a soft-start function.
- What is the product warranty period?
The entire electric furnace unit comes with a one-year free warranty. Heating elements are considered consumable parts and are generally not covered by the long-term warranty; however, if natural failure occurs within the specified period, the issue will be handled in accordance with the manufacturer’s after-sales policy.
