Technical Articles
NANBEI Is Professional On Providing One-step Solution Of Laboratory Instruments And Equipment
The MF-1000, MF-2000, and MF-3000 models are typically differentiated by their melting capacity, and sometimes by maximum temperature rating or power.
Common differences are (please verify with actual product specifications):
Melting Capacity:
MF-1000: Usually refers to a maximum melting capacity equivalent to approximately 1 kilogram (Kg) of gold.
MF-2000: Usually refers to a maximum melting capacity equivalent to approximately 2 kilograms (Kg) of gold.
MF-3000: Usually refers to a maximum melting capacity equivalent to approximately 3 kilograms (Kg) of gold.
Note: Different metals have different densities, so the weight for a given volume varies. Capacity is often stated for gold, and conversion is needed for other metals.
Maximum Temperature:
While in the same series, models with different capacities might have slightly different maximum temperature ratings (e.g., 1100℃, 1200℃) to accommodate larger melt sizes or metals with higher melting points.
Heating Speed & Power:
Larger capacity models typically require higher heating power to achieve a reasonable heating speed. Thus, the power of MF-3000 is usually higher than MF-2000, and MF-2000 is higher than MF-1000.
Dimensions & Weight:
Larger capacity models will generally have increased physical size and weight.
Price:
Models with larger capacity, higher power, or higher maximum temperature typically have a higher price.
Summary: Users usually choose a model based on the type of metal to be melted (determining required temperature) and the amount of metal to be melted per batch (determining required capacity). The MF-1000, MF-2000, and MF-3000 primarily offer different capacity options.
3. Usage Instructions
The Small Melting Furnace MF-1000/2000/3000 series is designed for efficient and precise melting of metals. Proper usage ensures safety and optimal results.
Preparation:
Inspect the furnace for any damage. Ensure the power cord is securely connected and the unit is properly grounded.
Set up your workspace in a well-ventilated area, away from flammable materials. A fume hood or local exhaust is recommended, especially for metals that produce fumes.
Prepare the appropriate graphite crucible (ensure it fits your furnace model) and high-temperature tongs.
Gather and wear all necessary Personal Protective Equipment (PPE), including heat-resistant gloves, face shield or safety goggles, and heat-resistant clothing/apron.
Prepare the mold for the molten metal. Ensure the mold is dry and preheated (depending on the metal type).
Loading:
Place the metal material to be melted into the graphite crucible. Crucially, ensure the metal is completely dry and free of moisture to prevent splashing during melting!
Do not overfill the crucible – typically, fill no more than 2/3 of its capacity. Do not exceed the maximum rated melting capacity of your specific MF-1000/2000/3000 model. Overloading affects heating efficiency and lifespan.
Carefully place the loaded crucible into the furnace heating chamber, ensuring it is centered and stable.
Starting the Melting Process:
Close the furnace lid securely.
Connect power (if not already) and turn on the furnace switch (if applicable).
Set the target melting temperature on the control panel or touch screen, according to the melting point of your metal (usually 50-100℃ above the melting point).
Start the heating program. The furnace will begin heating, and the display will show the current temperature.
Monitoring:
During melting, you can monitor the process through the observation port (if available) or by carefully and briefly opening the lid (with extreme caution and full PPE).
Monitor the temperature display to ensure it reaches and holds the set temperature.
If stirring the melt or adding flux is required, use dedicated high-temperature stirring rods or tools, operating with extreme care to avoid splashing.
Stopping Heating:
Once the metal is fully melted and has reached the desired temperature, turn off the heating switch or stop the program.
Removing the Crucible and Pouring:
This is the most hazardous step; full PPE and proper tools are essential!
Carefully and steadily use the matching high-temperature tongs to grip the crucible firmly.
Slowly and smoothly lift the crucible containing the molten metal out of the furnace chamber.
Quickly but steadily pour the molten metal into the preheated mold. Maintain a consistent pouring speed to avoid trapping air bubbles or causing splashes.
Cooling and Cleaning:
Place the crucible on a heat-resistant surface (like a ceramic plate or dedicated stand) to cool naturally. Never place it directly on a standard surface or attempt to cool it with water!
Allow the mold and the metal casting to cool naturally.
Once the furnace has completely cooled down, clean out any residual metal dross or flux from the furnace chamber. Regularly inspect heating elements for damage.
4. Precautions for Use
Safety is paramount when operating small melting furnaces due to the extreme temperatures and molten metal involved. Always follow these precautions:
Extreme Heat: The furnace and its surroundings are extremely hot during operation and cool-down. Never touch the furnace body or lid directly with bare hands! Allow it to cool completely before cleaning or maintenance.
Molten Metal Hazard: Molten metal can cause severe burns and fire if it splashes.
Always wear full PPE: Heat-resistant gloves, face shield/safety goggles, protective clothing.
Ensure metal is DRY: Any moisture can cause steam explosion and splashing.
Avoid dropping anything into the molten metal or adding cold/wet items.
Electrical Safety: Ensure the furnace is properly grounded. Avoid using in wet conditions.
Ventilation: Use the furnace in a well-ventilated area to disperse fumes, especially when melting metals that produce toxic vapors.
Crucible Care:
Use only undamaged graphite crucibles suitable for the furnace size and metal type.
Graphite crucibles are consumable and oxidize at high temperatures; inspect and replace them regularly.
Use only the correct, sturdy tongs designed for the crucible.
Overloading: Never exceed the maximum rated melting capacity of your specific MF-1000/2000/3000 model.
Flammable Materials: Keep all flammable materials away from the furnace during operation and cool-down.
Cooling: Allow the furnace and crucible to cool naturally in a safe location. Never quench them with water or place them on a cold surface, as this can cause cracking, damage, or explosion.
Maintenance: Periodically inspect the heating elements, crucible, power cord, and lid. If any damage is found, do not operate the furnace.
Troubleshooting: If the furnace malfunctions, stop operation immediately. Do not attempt repairs unless you are qualified.
By strictly adhering to these usage methods and precautions, you can ensure the safe and effective operation of your Small Melting Furnace.