Precious metal melting electric furnaces are specialized
high-temperature melting equipment designed for gold, silver,
platinum, palladium, rhodium, and other precious metals and their
alloys. Focusing on the three core requirements of "low loss, high
purity, and high efficiency", they are widely used in jewelry
processing, precious metal recycling, gold extraction from
electronic waste, advanced alloy preparation for aerospace,
laboratory R&D, and other fields. Through precise temperature
control, atmosphere regulation, and efficient heating technology,
they achieve rapid melting, homogenization of composition, and
low-loss forming of precious metals, serving as core equipment in
precious metal processing and resource utilization.
- Low Loss Design: Tailored to the high-value nature of precious metals, the
furnaces adopt inert gas (Ar/N₂) protection or vacuum environments,
combined with special crucibles (graphite, quartz, zirconia, etc.).
This design can control the loss of Au/Ag below 0.1% and that of
platinum-group metals such as Pt/Pd to ≤0.5%, minimizing the loss
of precious metals.
- High Purity Guarantee: The furnace body is made of high-temperature resistant and
low-pollution materials, equipped with a precision temperature
control system (accuracy ±5℃) to avoid the introduction of
impurities. Some high-end models support vacuum melting, which can
effectively remove gaseous impurities (H₂, O₂, N₂) and produce
high-purity billets with no pores and uniform composition.
- High Efficiency and Flexibility: Mainstream models adopt medium-frequency induction heating
technology, featuring fast heating speed (3-15 minutes per furnace)
and adapting to different production capacity requirements from
0.1kg to 50kg. They support batch small-scale production and
continuous operation, capable of melting pure metals, alloys (such
as K-gold, platinum-iridium alloys, silver-copper alloys), and
precious metal waste.
- Safety and Environmental Protection: Equipped with water cooling systems, anti-splashing devices,
emergency shutdown interlocks, and special flue gas purification
equipment, the furnaces can efficiently collect metal dust, avoid
environmental pollution and potential safety hazards, and comply
with industrial environmental protection and safe production
standards.
- Jewelry and Accessories: Melting and pouring of K-gold, platinum,
and silver jewelry, supporting personalized design and mass
production;
- Precious Metal Recycling: Extraction and regeneration of Au, Ag,
Pt, and Pd from electronic waste, waste jewelry, and industrial
waste residues;
- High-End Manufacturing: Preparation of precious metal alloys (such
as platinum-rhodium thermocouple wires, gold alloy contacts)
required for aerospace, electronic components, and medical
equipment;
- Scientific Research: R&D, composition optimization, and
performance testing of precious metal materials in universities and
research institutes.
Precious metal arc furnaces are characterized by vacuum/inert
atmosphere, water-cooled copper crucibles/copper molds, and arc
heating. The key parameters prioritize melting capacity,
vacuum/atmosphere conditions, power supply, and cooling system,
while balancing metal loss and safety. Below is a general parameter
system and typical models for easy selection and comparison.
- Melting Capacity: Calculated based on the actual density of precious metals and
effective crucible volume, with a 10–20% margin reserved to prevent
overflow.
- Vacuum/Atmosphere: Vacuum + high-purity Ar/He is preferred, reducing Au/Ag loss to
below 0.1% and platinum-group metal (e.g., Pt/Pd) loss to ≤0.5%.
- Power Supply & Current: Current determines arc power and heating rate; voltage matches
electrode spacing to ensure stable arc striking and uniform
heating.
- Cooling System: Water pressure and flow rate must meet the heat dissipation
requirements of the furnace body, electrodes, and copper mold;
water temperature interlock prevents equipment damage due to
overheating.
- Safety Interlock: Emergency shutdown, water cooling fault alarm, anti-splashing
device, and observation window protection are essential
configurations.
- Small-Batch R&D/Samples: Prioritize small-scale vacuum arc furnaces, focusing on low
vacuum degree, rapid arc striking, and replaceable copper molds to
control metal loss and gaseous impurities.
- Small-to-Medium Batch Recycling/Ingot Casting: Choose multi-station models equipped with inert gas protection
and flue gas purification to balance efficiency and environmental
friendliness.
- High-Melting-Point Platinum-Group Metals: Adopt high-vacuum and high-current designs with water-cooled
copper crucibles to ensure complete melting and uniform
composition.
If needed, I can provide a customized parameter list and equipment
selection comparison based on your single furnace weight, target
metal loss rate, alloy type, and on-site conditions.
