Copper Leaching Vessel Array
South America
The copper SX-EW operation processes acidic ore slurry (pH 1.5, 60°C) containing abrasive particulates. Previous rubber linings from other suppliers had failed within 3 years due to combined acid attack and abrasion wear, causing production losses exceeding $5M annually.
Jasmino engineered a dual-hardness rubber lining system — a hard natural rubber outer layer for abrasion resistance bonded to a soft chlorobutyl inner layer for acid impermeability. The compound was developed at GBT Germany and applied at our India facility.
Our approach
Compound R&D
GBT Germany developed a dual-compound system: 65 Shore A natural rubber for abrasion resistance (DIN abrasion <100 mm³) over 50 Shore A chlorobutyl for chemical barrier performance.
Vessel Design
8 agitated leach tanks designed per ASME VIII with wear-resistant baffles and nozzle reinforcements. All agitator shafts sealed with rubber-lined stuffing boxes.
Application
Full autoclave cure at 6 bar/140°C for maximum rubber-to-steel bond strength. Peel test results averaged 8 kN/m — 60% above specification.
Piping Package
2,400m of rubber-lined steel piping for slurry transfer between leach tanks, settlers, and the electro-winning circuit.
Project results
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