Process autoclave MR series

high-capacitycompactwith cooler

Product overview
FLS mercury retorts remove mercury from mercury-bearing materials by controlled heating (vaporisation) and condensation. The process reduces health and environmental risks and enables recovery of liquid mercury for safe removal or recycling.

Key benefits

• Low emissions — Engineered to comply with strict international mercury emission limits; optional particle filters available to further reduce emissions.
• Versatile — Handles feedstocks with a wide range of mercury concentrations. Available in barrel-style (suitable for electrowinning sludge) and cabinet-style (for Merrill‑Crowe circuits).
• Complete system supply — Supplied pre-assembled and skid-mounted including condenser train, mercury trap, dual coalescing/HEPA filters and sulphur‑impregnated carbon bed for simplified shipping and start-up.

Retort types

• Barrel retort — Fully enclosed stainless‑steel barrel oven with 253MA internal oven components for high‑temperature corrosion resistance. External‑fuel or internal‑heating options and integral chilling system. Suitable for high‑moisture, variable materials and heavy‑duty, higher‑capacity applications.
• Cabinet retort — Compact, skid‑mounted design with 253MA internals and integrated chiller. Excellent vapour containment; designed for integration with Merrill‑Crowe circuits.

Complete system components

• Condenser train
• Mercury trap
• Dual coalescing / HEPA filters
• Sulphur‑impregnated carbon bed
• Pre‑assembled, skid‑mounted retort modules

Operation & maintenance

• Pre‑assembly, testing and skid‑mounting to simplify installation and commissioning.
• Aftermarket supply of spares and wear parts to minimise downtime.
• Operational support: troubleshooting, technical advice and circuit optimisation.
• Support services: circuit audits, preventive maintenance programs, operator and maintenance training, and performance reporting.

How it works
Material containing mercury is heated in the retort oven until mercury vaporises (boiling point ≈ 356.7 °C). The vapour passes through a cooling system where it condenses to liquid mercury and is collected for controlled removal or recovery.

Why mercury is dangerous
Mercury is toxic: exposure can damage the nervous, digestive and immune systems and impair internal organs.

Features / technical specifications

• Models: MR series (examples: 10MR, 20MR, 40MR, 60MR)
• 10MR — Oven size (ft3): 10; Oven heat input (kW): 40; Chiller capacity (kW): 40
• 20MR — Oven size (ft3): 20; Oven heat input (kW): 70; Chiller capacity (kW): 70
• Design options: barrel‑style (external fuel or internal heating) and cabinet‑style (compact, skid‑mounted chiller)
• Materials/internals: 253MA internal oven components; fully enclosed stainless‑steel barrel ovens for barrel designs
• System inclusions: condenser train, mercury trap, dual coalescing/HEPA filters, sulphur‑impregnated carbon bed; pre‑assembled and skid‑mounted
• Applications: electrowinning sludge treatment (barrel) and Merrill‑Crowe circuits (cabinet); suitable for high moisture and variable mercury‑bearing materials