---
title: Advanced Copper Electrorefining & Smelting
type: technology
url: "https://www.envisioning.com/research/stratum/latam-ex-brazil__cl-copper-electrorefining-technology"
hub: stratum
summary: Chile produces 27% of global copper; advanced electrorefining achieves 99.99% purity for electronics-grade cathode, with Codelco investing in flash smelting and acid recovery systems.
---

# Advanced Copper Electrorefining & Smelting

Chile produces 27% of global copper; advanced electrorefining achieves 99.99% purity for electronics-grade cathode, with Codelco investing in flash smelting and acid recovery systems.
- Technology Readiness Level: 8/9
- Impact: 3/5
- Investment: 3/5
Chile's copper processing technology represents decades of metallurgical expertise applied to the world's largest production volumes. Advanced electrorefining cells produce 99.99% pure copper cathode required for electrical wiring, circuit boards, and EV motor windings. The process chain includes SAG/ball mill grinding, flotation concentration, flash smelting (which captures sulfur as sulfuric acid rather than emitting SO2), and electrowinning/electrorefining with automated cathode stripping.

Codelco and private operators are investing in process intensification: larger flotation cells with improved hydrodynamics, column flotation for fine particle recovery, bioleaching of oxide ores using acidophilic bacteria, and solvent extraction-electrowinning (SX-EW) for low-grade deposits. The sulfuric acid produced as a smelting byproduct is sold to the lithium industry for brine processing — a circular economy within Chile's mining sector.

As the world electrifies, copper demand is projected to increase 50% by 2040. Chile's ability to maintain production volumes (5.3 million tonnes annually) while ore grades decline requires continuous technological innovation in extraction, concentration, and refining. The country's metallurgical expertise is a form of technological sovereignty — the know-how to process complex copper ores exists in relatively few places globally, and Chile's decades of operational experience give it an advantage that newcomers cannot quickly replicate.

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Source: Envisioning — Technology Research Institute (https://www.envisioning.com/research/stratum/latam-ex-brazil__cl-copper-electrorefining-technology)