1100°C Top-Loading Atmosphere Box Furnace for High Temperature Processing

1100°C Top-Opening Box-Type Sealed Atmosphere Furnace

This 1100°C top-opening box-type sealed atmosphere furnace features a maximum operating temperature of 1100°C. It utilizes an electrically operated lifting door, a pneumatic locking mechanism, and a fully sealed structure. Equipped with multi-point temperature monitoring, hot-air circulation, an adjustable gas inlet/exhaust system, and a 10-inch touchscreen programmable control system, it is suitable for high-temperature heat treatment processes requiring atmosphere protection, precise temperature control, and uniform heating.

Product Features

1. Large-volume chamber with high batch processing capacity

The furnace chamber measures 1000 × 1000 × 800 mm (depth × width × height), offering a volume of 0.8 cubic meters. It is suitable for the controlled-atmosphere sintering and heat treatment of large batches of samples or large-sized workpieces. Power rating: 65 kW; power supply: 380 V.

2. Fully sealed structure for a stable atmosphere

High-temperature fiber packing is used for sealing, with sealing surfaces at the furnace opening and roof precision-machined via CNC. Water-cooling structures at the roof and opening dissipate heat from the sealing rings, preventing damage caused by excessive temperatures. Vacuum-rated electrode interfaces ensure durable sealing. The furnace door features electric lifting and pneumatic locking, with opening and closing heights controlled by a manual switch.

3. Independent three-zone temperature control with ±5°C uniformity

Three temperature control zones (left/right, front/back, and bottom) utilize imported Kanthal resistance heating elements, evenly distributed across the chamber walls and bottom. Temperature control accuracy is ±1°C, and temperature uniformity is ±5°C (depending on chamber dimensions).

4. Hot air circulation system for enhanced temperature uniformity

A fan assembly is installed at the top of the chamber to circulate air and homogenize the internal temperature. The circulation blades are made of 310S stainless steel, and the motor is water-cooled; a variable frequency drive (VFD) allows for stepless speed adjustment (controlled by a dedicated switch), effectively improving temperature uniformity within the furnace.

5. 2HP chiller and triple-layer insulation for low casing temperature

Equipped with a 2HP chiller. The furnace lining utilizes vacuum-formed, high-purity, lightweight alumina materials, while areas prone to impact during loading and unloading (furnace opening and bottom) use lightweight hollow-sphere alumina boards. A three-layer insulation structure—comprising aluminum silicate fiber board, alumina fiber board, and polycrystalline alumina fiber board—delivers energy savings more than 80% greater than traditional electric furnaces. During long-term operation without shutting down the furnace, the casing temperature remains below ambient temperature +20°C.

6. Eight-channel gas inlet system with programmable control; highly adjustable atmosphere.

Eight gas inlets are evenly distributed across the left and right sides of the furnace chamber, with pairs of flow meters integrated into the inlets; gas flow can be controlled (started or stopped) via the PLC program. An adjustable DN30 exhaust port with a valve is located at the top, allowing for the precise control of atmosphere flow and pressure to meet various process requirements.

Specifications (Furnace Chamber Dimensions)	Furnace chamber dimensions (Depth × Width × Height) mm: 1000 × 1000 × 800
Power Supply AC	380V
Power	65KW
Control Range	80 to 1100°C
Temperature Measuring Element	Thermocouple graduation K, measuring range 0–1320°C
Temperature Control Points	Three (one on the left and right, one at the front and rear, one at the bottom)
Heating Element Installation Position	Evenly distributed and installed around the furnace chamber + bottom
Heating Elements	Imported Kanthal resistance wire
Temperature Control Accuracy	±1°C (integrated circuit control, no overshoot)
Furnace Temperature Uniformity	±5°C (depending on the furnace chamber size)
Hot Air Stirring	Function of hot air stirring: fan blades are provided at the top inside the furnace chamber. Through the rotation of the fan blades, the temperature in the internal space of the furnace chamber is stirred for uniform distribution, thereby achieving the purpose of uniform temperature inside the furnace
Stirring Blades	310S stainless steel
Stirring Motor and Speed	The stirring motor adopts water cooling, and the speed is steplessly adjusted through a frequency converter (an additional switch is added for separate control)
Chiller	2P water chiller
Heating Rate	The heating rate can be freely adjusted. Adjustment range: fastest heating rate 15°C per minute (15°C/min), slowest heating rate 1°C per hour (1°C/h)
Furnace Body Structure	The furnace body sealing adopts high-temperature fiber packing. The sealing positions of the furnace opening and furnace top are machined by CNC machine tools. The furnace top and furnace opening are provided with water-cooling structures to dissipate heat for the sealing rings and prevent damage caused by excessively high temperatures. The furnace body power interface adopts vacuum electrodes to ensure sealing and durability. It is manufactured through polishing, grinding, acid washing, phosphating, plastic powder spraying, high-temperature baking, etc. It has 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 Door Opening Method	Electric lifting, pneumatic locking, handle switch controls the opening height and closing height. The furnace body is sealed as a whole
Refractory Materials	The furnace lining is made of vacuum-formed high-purity alumina lightweight material. Positions prone to collision when loading and unloading materials (furnace opening, furnace bottom) adopt lightweight hollow ball alumina plates, which have high operating temperature, small heat storage, resistance to rapid heating and cooling, and good insulation performance (energy-saving effect is more than 80% that of old-style electric furnaces)
Insulation Materials	Three-layer insulation is adopted, namely: aluminum silicate fiberboard, alumina fiberboard, and alumina (polycrystalline) fiberboard. The energy-saving effect is more than 80% that of old-style electric furnaces
Furnace Body Shell Temperature	For long-term continuous operation without shutdown, the shell temperature is less than room temperature +20°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 control mode. 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.
Touch Screen	10-inch, set temperature curve, audible and visual alarm after program completion
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	30-segment program control function, can be input and set as: one curve with 30 segments, two curves with 14 segments each, three curves with 9 segments each, five curves with 5 segments each; multiple curves can be input at the same time and can be called arbitrarily during use
Exhaust Hole	Exhaust hole at the top DN30, with an adjustable valve
Gas Inlets	Eight gas inlets are evenly distributed on the left and right sides of the furnace chamber. Two flow meters are integrated into one gas inlet, and the gas inlet switch can be controlled to stop according to the PLC program
Furnace Bottom Plate	310S high-temperature backing plate to prevent collision with refractory materials
Random Accessories	One pair of crucible tongs, one pair of high-temperature gloves
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)

Application Areas

• Atmosphere Heat Treatment of Metals: Suitable for heat treatment processes—such as quenching, annealing, and tempering—of tool steels, die steels, and high-speed steels under protective atmospheres to prevent oxidation and decarburization.
• Atmosphere Sintering in Powder Metallurgy: Suitable for the atmosphere-protected sintering and forming of metal and alloy powders.
• Atmosphere Sintering of Advanced Ceramics: Suitable for sintering ceramic materials such as alumina and zirconia under protective atmospheres.
• Processing of Electronic Components: Suitable for the atmosphere sintering and heat treatment of electronic components, including electronic ceramic substrates and MLCCs.
• R&D of New Materials: Suitable for research into atmosphere sintering processes for new materials, such as specialty materials and composites.

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)

1. What is the maximum operating temperature of this electric furnace?

The maximum operating temperature is 1100°C, with a control range of 80–1100°C, making it suitable for various high-temperature heat treatment and controlled-atmosphere processes.

2. What are the furnace chamber dimensions and rated power?

The furnace chamber dimensions are 1000 × 1000 × 800 mm (depth × width × height); the rated power is 65 kW, and the power supply is AC 380V.

3. How does the equipment ensure temperature uniformity within the furnace?

The equipment utilizes heating elements on the sides and bottom of the chamber, a three-point temperature monitoring system, and a top-mounted hot-air circulation fan.

4. Can multi-stage heating and cooling programs be set?

Yes. The 10-inch touchscreen supports 30-stage program control, allowing for the configuration of heating, soaking (holding), and cooling phases, as well as the storage and recall of multiple temperature profiles.

5. What is the warranty period for the equipment?

The entire furnace comes with a one-year free warranty; however, heating elements are not covered under the standard warranty. Heating elements that fail due to natural causes within three months are eligible for free replacement in accordance with the product agreement.