1200°C Fire Assay Furnace: Specifically designed for fusion and analysis of exploration geochemical samples. Capable of melting 12 samples per batch, it features electric/pneumatic top-loading with foot pedal control, silicon carbide rod heating, and precise temperature control of ±1°C. Suitable for testing rock cores, soil, and other samples, offering fully automated operation for convenience and efficiency.
Fire Assay Furnace is designed for fire assay methods in exploration geochemistry, which applies geochemical principles to mineral exploration. Its purpose is to use chemical analysis to help clients identify the geographical location of sedimentary deposits and determine the extent of known ore deposits. Exploration geochemistry involves the analysis of samples such as rock cores, rocks, stream sediments, soil, glacial debris, and vegetation.
The control panel is equipped with an intelligent temperature regulator, power switch, main heating operation/stop buttons, voltage and current meters, and a computer interface for real-time monitoring of the system's operational status. The product utilizes reliable integrated circuitry, ensuring a stable working environment and strong anti-interference capabilities. Even at maximum temperatures, the furnace's exterior shell remains below 50°C, significantly improving workplace conditions. With microcomputer program control, users can program heating curves and achieve fully automated heating and cooling. Parameters and programs can be modified during operation, offering flexibility, convenience, and ease of use.
| Item | Details |
| Category | 1200℃ |
| Maximum Operating Temperature | 1200℃ |
| Long-term Operating Temperature | 1200℃ |
| Temperature Control Range | 80-1200℃ |
| Furnace Chamber Dimensions (mm) | Depth × Width × Height: 430×250×200 |
| Number of Samples per Melting | 12 pieces |
| Voltage | 380V |
| Power | 20kW |
| Temperature Measuring Element | Type K Thermocouple, measuring range: 0-1350℃ |
| Heating Element Installation Position | Vertically installed on the inner wall of the furnace chamber |
| Heating Elements | Silicon carbide rods are used as heating elements (U-shaped, equal diameter). Silicon carbide rods are non-metallic high-temperature electric heating elements made of high-purity α-SiC as the main raw material. They feature fast heating, high thermal efficiency, long service life, no deformation at high temperature, easy installation/operation/maintenance, and a maximum temperature of 1500℃. |
| Temperature Control Precision | ±1℃ (Integrated circuit control, no overshoot) |
| Furnace Temperature Uniformity | ±5℃ (Varies by furnace chamber size; multi-point control can be adopted for large furnaces to achieve better temperature uniformity) |
| Heating Rate | Freely adjustable range: Maximum 15℃/min (Non-linear heating), Minimum 1℃/h |
| Touch Screen | 7-inch touch screen, supporting functions such as heating program setting, historical curve viewing, data report generation, and real-time power display |
| Furnace Body | Processed by CNC machine tools, undergoing polishing, grinding, pickling, phosphating, plastic powder spraying, high-temperature baking and other processes. Dual-color matching, novel and attractive appearance, with advantages of oxidation resistance, acid and alkali resistance, corrosion resistance, high-temperature resistance, and easy cleaning. |
| Furnace Structure | Adopts an air-cooled double-layer structure. Effective air-cooled guide partitions realize overall cold air circulation of the furnace shell, which cools the heating element conductive sheets before exhausting. This avoids high-temperature oxidation of the conductive sheets and ensures a good working environment. |
| Furnace Door Opening Mode | Electric-pneumatic upper opening; foot switch controls the opening and closing height |
| Sampling Tongs | Carbon steel or cast iron material |
| Furnace Loading Cart | Carbon steel shell with plastic spraying treatment |
| Melting Mold | Cast iron material |
| Refractory Material | Furnace lining is made of vacuum-formed high-purity lightweight alumina material; positions prone to collision during material handling and load-bearing positions (furnace mouth, furnace bottom) are made of lightweight hollow sphere alumina board. It features high operating temperature, low heat storage, resistance to rapid heating/cooling, no cracking, no slag falling, and excellent thermal insulation (energy-saving effect is more than 80% higher than old-fashioned electric furnaces). |
| Insulation Materials | Three-layer insulation structure: Aluminosilicate fiber board, alumina fiber board, polycrystalline alumina fiber board. Energy-saving effect is more than 80% higher than old-fashioned electric furnaces. |
| Furnace Body Surface Temperature | ＜45℃ during long-term continuous operation |
| Safety Protection | Adopts an integrated module control unit with accurate control precision, designed with dual-loop control and dual-loop protection. It provides protection against overshoot, undershoot, thermocouple break, phase loss, overvoltage, overcurrent, overtemperature, current feedback, and soft start. |
| Temperature Control System | Uses closed-loop thyristor module trigger control (phase-shift trigger or zero-crossing trigger mode). Output voltage, current, or power is continuously adjustable, with constant voltage, constant current, or constant power characteristics. The current loop serves as the inner loop and the voltage loop as the outer loop. When a load is suddenly applied or the load current exceeds the limit, the output current of the voltage regulator is restricted within the rated range to ensure normal operation. The voltage loop also participates in regulation to maintain stable output current and voltage within the rated range (with sufficient adjustment margin), protecting heating elements from excessive current/voltage impact and ensuring safe, reliable control effect and precision. |
| Display Parameters | Real-time temperature, temperature segment number, segment time, remaining time, output power percentage, voltage, current, etc. |
| Temperature Curve Setting | Uses an intelligent temperature controller supporting multiple regulation modes such as standard PID, artificial intelligence adjustment (APID), and MPT. It has self-tuning and self-learning functions, with no overshoot or undershoot. Equipped with a 30-segment program control function, it enables heating and cooling control at any slope, and supports programmable/operable commands such as jump (cycle), run, pause, and stop. Program modification is allowed during operation. An artificial intelligence adjustment algorithm with curve fitting function is adopted to achieve smooth and stable curve control. |
| Multiple Curve Input | 30-segment program control function, which can be set as follows: 1 curve with 30 segments, 2 curves with 14 segments each, 3 curves with 9 segments each, 5 curves with 5 segments each; multiple curves can be input simultaneously and called arbitrarily during use. |
| Communication Interface | Equipped with RS485 communication interface, communication distance up to 1200 meters. Supports computer-controlled operations such as furnace start, pause, stop, heating curve setting and reading, parameter setting, etc., with high reliability and ease of operation. The computer screen displays rich content, including measured value, set value, output value, segment time, segment number, heating curve, power percentage curve. Heating curves can be stored via computer (callable and modifiable for set values and common parameters); historical curves and reports support adjustable recording intervals (1s-1h) and long-term storage. |
| Spare Parts | 2 heating elements, 2 sets of rod fixtures, 1 crucible tong, 1 pair of high-temperature gloves |
| Warranty Scope & Period | The electric furnace comes with a 1-year free warranty; heating elements are not covered (free replacement for natural damage within 3 months) |
| Packing List | 1 electric furnace, 2 heating elements, 2 sets of rod fixtures, 1 pair of high-temperature gloves, 1 instruction manual, 1 certificate of conformity, 1 acceptance report (factory inspection report), 1 sales delivery note |
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