High-Temperature 1200C Laboratory Electric Top-Opening Precision Furnace
As shown in the figure, the GWL-LBFS series 1200℃ high-temperature top-opening precision furnace adopts a split design of control system and furnace chamber. The furnace lining is made of vacuum-formed high-purity alumina lightweight material.
Application
This top-opening precision furnace is used in exploration geochemistry, which applies geochemical principles for mineral exploration. It helps users locate sedimentary deposits and define the extension of discovered deposits through chemical analysis. It supports the analysis of core samples, rock, river sediments, soil, glacial till, vegetation, and other materials.
The control panel is equipped with an intelligent temperature controller, power switch, main heating start/stop button, voltmeter, ammeter, and computer interface for real-time monitoring. It adopts reliable integrated circuits with strong anti-interference performance. The furnace shell temperature ≤45℃ at maximum temperature, greatly improving the working environment. It features microcomputer program control, programmable temperature curves, fully automatic heating/cooling, and editable parameters during operation, making it flexible and easy to operate.
Temperature control accuracy: ±1℃ (no overshoot); constant temperature accuracy: ±1℃. Fast heating rate, maximum ≤45℃/min.
The furnace chamber is fully made of vacuum-formed high-purity alumina lightweight material, featuring high working temperature, low heat storage, resistance to rapid heating and cooling, no cracking, no slagging, and excellent thermal insulation (energy saving over 60% compared with traditional furnaces). With a reasonable double-layer air-cooled structure, the test cycle is greatly shortened.
Technical Parameters
Item | Specification |
Maximum working temperature | 1200℃ |
Long-term working temperature | 1150℃ |
Chamber dimensions (L×W×H) | 600×400×400 mm |
Temperature control range | 80℃ to 1200℃ |
Temperature sensor | Pt–Rh K thermocouple, measuring range 0–1300℃ |
Heating element installation | Installed vertically around and at the bottom of the chamber |
Temperature control accuracy | ±1℃ (integrated circuit control, no overshoot) |
Temperature uniformity | ±3℃ (dual independent control systems) |
Heating rate | Adjustable: max. 30℃/min (non-linear), min. 1℃/h (non-linear) |
Heating element | Kanthal A1 high-temperature alloy resistance wire |
Furnace body | CNC machined, polished, pickled, phosphated, plastic sprayed, high-temperature baked; two-tone appearance, oxidation-resistant, acid/alkali-resistant, corrosion-resistant, high-temperature resistant, easy to clean |
Furnace structure | Double-layer air-cooled with air guide baffles for full circulation, cooling heating element terminals to avoid oxidation |
Door opening mode | Electric/pneumatic top opening; foot switch controls opening/closing height |
Sealing | Pneumatic lifting and locking; full furnace sealing |
Gas inlet & outlet | Top exhaust port DN30 with adjustable valve; 8 evenly distributed inlets at lower sides, integrated main inlet with flow meter |
Furnace base plate | 310S heat-resistant steel plate, bottom height 920 mm |
Applicable atmospheres | Nitrogen, argon, carbon monoxide, oxygen, etc. |
Atmosphere control | Siemens PLC + solenoid valve + pressure reducing valve + 2-way float flow meter |
Charging cart | Manual lifting |
Refractory material | Vacuum-formed high-purity alumina lightweight material; furnace mouth/bottom: lightweight hollow sphere alumina plate (energy saving over 80%) |
Insulation material | Three layers: aluminum silicate fiber board, alumina fiber board, alumina polycrystalline fiber board (energy saving over 80%) |
Furnace shell temperature | ≤45℃ under long-term continuous operation |
Protection system | Integrated module, dual-circuit control & protection: overshoot, over-temperature, over/under voltage, over current, phase loss, broken thermocouple, current feedback, soft start |
Control mode | Closed-loop SCR trigger control (phase-shift or zero-crossing); constant voltage/current/power; inner current loop + outer voltage loop |
Automatic control | Built-in Siemens PLC; 10-inch touch screen for one-key automatic control of temperature, time, pressure, atmosphere, and exhaust |
Display parameters | Real-time temperature, segment number, segment time, remaining time, output power percentage, voltage, current |
Temperature curve control | Intelligent controller with PID/APID/MPT, auto-tuning, self-learning, 30-segment programming, smooth curve fitting |
Multi-curve program | 50-segment programmable; assignable to 1/2/3/5 curves; storable and callable |
Communication interface | RS485 (up to 1200 meters); PC control for start/pause/stop, curve setting, data recording, history curve/report (1s–1h interval, long-term storage) |
Standard accessories | 2 heating elements, 2 sets of rod fixtures, 1 crucible tong, 1 pair of high-temperature gloves |
Warranty | 1-year free warranty; heating elements not covered (free replacement for natural damage within 3 months) |
Packing list | 1 furnace, 2 heating elements, 2 sets of rod fixtures, 1 pair of high-temperature gloves, manual, certificate, factory inspection report, delivery note |
