Automated Fire Assay System

The automated fire assay system by Qingdao Decent Group integrates complex traditional fire assay processes into a highly efficient, precise all-in-one solution through seamless intelligent connection of robotic arms and orbital conveying systems.

Featuring our exclusive patented cupellation structure, it automatically identifies the cupellation endpoint of all cupels and retrieves them individually upon completion, effectively avoiding silver loss. Ideal for precious metal smelting, mineral testing, and related fields, the system supports modular standalone operation or full-line linkage, delivering exceptional flexibility and efficiency.

1. Automatic Flux Dosing System

Receives process formulas via upper computer upon robotic arm crucible placement. Uses rotating silos and weighing modules for sequential feeding, then conveys crucibles to the next station.

• Precision electronic weighing (±1g)
• Vision-based error-proofing system
• Cross-contamination prevention design compatible with thousands of formulas
• MES networking for remote control and full-process ratio traceability

2. Crucible Tumbler

Receives crucible trays via conveyor; after photoelectric positioning, films secure trays for reciprocating inversion mixing.

• Gear motor drive for reciprocating turnover mixing
• Mixing homogeneity >98% within 10-15 minutes
• Real-time visual monitoring

3. Covering Agent Feeder

Utilizes screw quantitative injection for precise and uniform addition of covering agent to ore samples.

• Screw-type volumetric injection
• Precise control of covering agent application thickness (8-10mm)
• 3x efficiency increase compared to manual operation

4. Fusion Furnace

Robotic arm places crucibles into the furnace, achieving complete ore melting at 1200℃ in 70 mins.

• Precision temperature control at 1200°C
• LIMS system integration
• Smart automated furnace door

5. Automatic Steel Mold Turnover Machine

The robotic arm pours the molten sample into the steel mold, which then automatically inverts to transfer the slag and lead button into the lead button tray.

• High-precision robotic arm coordination
• Seamless automated synchronization of mold cooling and turnover
• Efficient lead button separation during mold turnover

6. Visual Cupellation Furnace

Cupels enter modular chambers; endoscopes detect cupellation endpoints and retrieve finished cupels individually.

• Endoscopic real-time monitoring and automatic endpoint judgment
• Individual extraction of finished cupels to prevent precious metal loss
• Precious metal recovery rate ≥98%

7. 6-Axis Robotic Arm

Precisely handles crucible grabbing, molten sample pouring, and waste crucible disposal.

• Precision gripping and placement of crucibles into the fusion furnace
• Seamless coordination with door operation and melting process for safe high-temperature material transfer
• Precise crucible pouring with tilt angle control (±1°) to prevent metal splash loss
• High-temperature resistant design for molten metal environments to eliminate manual intervention risks
• Replacement of high-risk tasks, multi-axis precision control, and high system integration