Lead Zinc Ore Production Line and Process Solution

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Product Details

Lead-Zinc Ore Production Line Solution focuses on the high-efficiency separation of Galena (Pb) and Sphalerite (Zn).

This solution adopts "Flotation as the main process", solving key technical problems such as lead-zinc separation and iron sulfide treatment. It features a flexible process, high recovery rate, and environmental compliance.

What Is Lead-Zinc Ore Beneficiation?

Lead-Zinc Ore Beneficiation is the process of separating Lead and Zinc minerals from gangue and from each other. Due to their close symbiotic relationship, Preferential Flotation (floating Lead first, then Zinc) or Mixed-Separate Flotation is commonly used to produce separate high-grade concentrates.

Lead-Zinc Ore Beneficiation Process Flow

Lead-Zinc Beneficiation Process Steps

Step 1: Crushing & Screening

Goal: Reduce ore size to ≤ 10mm for efficient grinding.

Rough Crushing: Jaw Crusher handles large raw ore.
Medium Crushing: Cone Crusher reduces size further.
Fine Crushing: High Pressure Roller Mill ensures fine feed.
Control: A Vibrating Screen returns oversize particles.

Lead Zinc Ore Crushing Plant

Step 2: Grinding & Classification

Goal: Liberate Lead and Zinc minerals (Monomer Dissociation).

Primary Grinding: Ball Mill with Spiral Classifier.
Secondary Grinding: Ball Mill with Cyclone Group ensures optimal particle size distribution.

Step 3: Flotation Separation

Goal: Separate Lead and Zinc concentrates using specific reagents.

Lead Flotation:
Inhibitors suppress Zinc. Collectors float Lead (Galena) first.

Zinc Flotation:
Copper Sulfate activates Zinc (Sphalerite). Collectors float Zinc from the tailings of the Lead circuit.

*Sulfur flotation is performed afterwards if Pyrite recovery is needed.

Lead Zinc Flotation Machines

Step 4: Concentrate Dewatering

Goal: Reduce moisture to ≤ 8-12%.

High-Efficiency Thickener increases underflow concentration to ≥65%.
Filter Press produces dry filter cake.

Process Selection Guide

Process Type	Applicable Ore	Characteristics
Priority Flotation	Coarse-grained, high grade.	Float Lead first, then Zinc. High concentrate quality.
Mixed-Separate Flotation	Low grade, fine-grained.	Float Pb-Zn together, then separate them. Lower initial cost.
Asynchronous Flotation	Complex, uneven floatability.	Segmental adjustment of reagents for optimal recovery.

Core Equipment Configuration

System	Main Equipment	Performance
Crushing	Jaw Crusher + Multi-cylinder Cone Crusher	30% Energy Saving.
Grinding	Energy-saving Ball Mill + Cyclone	Classification efficiency ≥85%.
Flotation	Air Inflated Flotation Machine	Special design for Pb-Zn separation.
Dewatering	Deep Cone Thickener + Filter Press	Water return rate ≥90%.

Success Stories & Data

Project: Sulfide Lead-Zinc Ore Plant

Raw Ore Grade: 2.5% Pb, 3.8% Zn
Lead Concentrate: 65% Pb (92% Recovery)
Zinc Concentrate: 52% Zn (89% Recovery)

Lead Zinc Processing Plant Project

Frequently Asked Questions (FAQ)

Q1: How do you separate Lead and Zinc effectively?

A: We use a specialized Inhibitor System. In the first stage, Zinc is suppressed (inhibited) so only Lead floats. Then, Zinc is activated (using Copper Sulfate) and floated in the second stage.

Q2: What services do you offer?

A: We provide Ore Characterization (Mineralogical Analysis), Process Solution Design (Flowsheet), Equipment Manufacturing, Installation, Commissioning, and Operator Training.

Q3: Can you handle high-sulfur ore?

A: Yes. We can design a circuit to recover Pyrite (Sulfur) as a separate commercial concentrate (Sulfur grade ≥45%) after Lead and Zinc recovery.

Get Your Custom Lead-Zinc Plant Design

We choose the most suitable flotation process based on your ore properties (symbiotic relationship, oxidation rate).
Contact us for the solution and quotation.

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