Copper Oxide SX-EW Processing Plant | Heap Leaching, Solvent Extraction & Electrowinning Solution

1. Process Overview

The SX-EW (Solvent Extraction + Electrowinning) process is the most economical and mature hydrometallurgical technology for low-grade copper oxide mines. Different from traditional flotation and pyrometallurgy, the SX-EW production line realizes pure wet copper extraction without high-temperature smelting. The whole workflow includes ore crushing, heap leaching, solution collection, solvent extraction, and electrowinning, directly producing high-purity LME-standard copper cathode.

This technology is widely adopted in large open-pit copper oxide mines around the world. It features modular construction, low investment, low energy consumption, and strong adaptability to complex ore conditions. It can effectively utilize low-grade copper resources that cannot be processed by conventional flotation methods.

2. Suitable Copper Ore Types

Perfectly Suitable:

• Copper oxide ore (Malachite, Azurite, Chrysocolla, Tenorite)
• Low-grade weathered copper oxide deposit
• Mixed oxide copper ore with small amounts of gangue
• Tailings and residual copper resources from old mines

Not Suitable:

• Primary copper sulfide ore (Chalcopyrite, Chalcocite)
• High-sulfur, high-arsenic refractory copper ore

3. Core Advantages of SX-EW Copper Process

• Low Capital Investment — No flotation cells, no smelting furnace, less civil construction, saving 30%–50% initial cost compared with traditional copper processing plants.
• Utilize Low-Grade Resources — Effectively process copper ore with grade as low as 0.2%, maximize mine resource utilization.
• High Purity Final Product — Directly produce 99.99% LME-grade copper cathode, ready for direct sales without further refining.
• Modular & Flexible Layout — Support phased construction, small-scale trial production first, then capacity expansion.
• Low Energy Consumption — The whole process operates at normal temperature, no high-temperature combustion, lower power and fuel consumption.
• Environmentally Friendly — Closed-loop solution circulation, little waste residue emission, compliant with international mining environmental standards.
• Simple Operation & Low Labor Cost — Automatic solution circulation and electric control system, fewer on-site operators.

4. Complete Equipment List for SX-EW Plant

4.1 Crushing System

• Jaw Crusher / Cone Crusher
• Vibrating Feeder
• Vibrating Screen
• Belt Conveyor

4.2 Heap Leaching System

• Ore Stacking Machine
• HDPE Anti-seepage Liner
• Spray Irrigation System & Drip Pipe Network
• PLS (Pregnant Leach Solution) Collection Tank
• LPS Low-Purity Solution Pool

4.3 SX Solvent Extraction System

• Mixer-Settler Extraction Cells
• Organic Solution Tank
• Washing & Stripping Device
• Solution Filter & Purification Equipment

4.4 EW Electrowinning System

• Electrowinning Cell Tank
• Copper Cathode Plate & Lead Anode Plate
• High-power Rectifier Cabinet
• Circulating Pump & Heat Exchanger

4.5 Auxiliary & Environmental System

• Wastewater Neutralization & Treatment System
• Dosing System
• Automatic Control Cabinet & Monitoring System

5. Plant Floor Area & Scale Reference

Industry Standard Layout Data (for customer quotation & design reference)

• 100–300 TPD small-scale plant — Covers 3,000–8,000 m²
• 500–1000 TPD medium-scale plant — Covers 10,000–20,000 m²
• 1000+ TPD large-scale mine project — Covers more than 30,000 m² (custom overall layout)

Feature: Heap leaching area can use natural mountainous terrain, no need for large flat factory land, greatly reducing land development cost.

6. Consumables & Chemical Reagents

• Sulfuric Acid (H₂SO₄) — Core leaching reagent, dissolves copper oxide ions
• Organic Extractant (LIX series) — Selectively captures copper ions in SX stage
• Modifier & Diluent — Improve organic solution activity and extraction efficiency
• Anode & Cathode Plates — Consumable parts for electrowinning
• HDPE Liner & Spray Pipe — Regular replacement for anti-seepage system
• Filter Media & Pump Parts — Daily wearing accessories

7. Project Flow Summary

Ore Crushing → Ore Stacking → Acid Spraying Heap Leaching → PLS Solution Collecting → SX Solvent Extraction → Solution Purification → EW Electrowinning → High-Purity Copper Cathode

8. FAQ for Copper Oxide SX-EW Plant

Q1: What kind of copper ore is suitable for SX-EW process?

A1: It is specially designed for copper oxide ore such as malachite and azurite. It is the best choice for low-grade oxide copper mines, but not applicable for primary copper sulfide ore.

Q2: What is the final product of the SX-EW production line?

A2: High-purity 99.99% LME standard copper cathode, which can be sold directly in international metal markets.

Q3: Is SX-EW plant cheaper than traditional copper flotation plant?

A3: Yes. SX-EW eliminates flotation and smelting links, with lower equipment investment, lower power consumption and lower operating cost, especially suitable for remote large-scale open-pit oxide copper mines.

Q4: Can the SX-EW project be built in phases?

A4: Absolutely. We support modular design. Clients can start with small capacity to test recovery effect, then expand the heap leaching area and equipment scale later.

Q5: What main chemicals are consumed during operation?

A5: The core consumables are sulfuric acid and LIX series organic extractant, with stable consumption and low operating cost.

Q6: Do you provide full turnkey service for SX-EW copper projects?

A6: Yes. We provide ore testing, process flow design, equipment manufacturing, site layout planning, installation guidance, operator training and full after-sales support for global copper oxide mining projects.