Lead and Zinc Ore Beneficiation Solutions

Solution Overview

This lead-zinc ore beneficiation solution focuses on the different characteristics of lead-zinc sulfide ore and lead-zinc oxide ore, adopts the technical route of "flotation as the main process, supplemented by the combined process", and realizes the high-efficiency separation and recovery of lead-zinc resources through the optimization of process design and equipment configuration. The program pays special attention to solving key technical problems such as lead-zinc separation and iron sulfide treatment, and is characterized by flexible process, high recovery rate, economy and environmental protection.

Lead-zinc ore beneficiation process details

Crushing and screening section

Three sections and one closed-circuit crushing system:

• Rough crushing (jaw crusher) → medium crushing (cone crusher) → fine crushing (high pressure roller mill)

• Vibrating screen closed-circuit cycle, to ensure that the particle size into the mill ≤ 10mm

Grinding and grading section

Stage grinding process:

• One-stage ball mill (closed circuit with spiral classifier) grinding

• Second stage ball milling (closed circuit with cyclone group) grinding

Flotation sorting section

Priority flotation process:

• Lead flotation: lime slurry, selective inhibitor, high efficient collector

• Zinc flotation: copper sulfate activation, special collector

• Sulfur flotation: recovery of pyrite if necessary

Mixed-Separate Flotation Process:

• Mixed flotation: neutral pH conditions, composite collector

• Lead-zinc separation: selective inhibitors after dosing

Equivalent floatable flotation process:

• Stage 1: simultaneous flotation of readily floatable lead-zinc minerals

• Stage 2: Flotation of remaining zinc minerals

• Concentrate removal: lead concentrate dezincification and zinc concentrate deleadification respectively

Asynchronous flotation process:

• Segmental adjustment of chemical regime and flotation parameters

• Ensure optimal flotation conditions for each mineral

Concentrate Processing Section

• Concentration: High-efficiency thickener (bottom stream concentration ≥65%)

• Filtration: ceramic filter (cake moisture ≤ 12%)

• Drying: steam drying system (concentrate moisture ≤8%)

Lead-zinc ore production line core equipment configuration

Technical Advantage

High-efficiency separation technology

• Specialized inhibitor system (lead-zinc selective separation)

• Compound activator to improve zinc recovery

• Multi-stage selection + sweeping process (lead recovery ≥90%, zinc recovery ≥88%)

Energy saving and consumption reduction design

• High-pressure roller mill process energy-saving 40%

• Flotation machine impeller optimization design saves 25% energy

• Thermal energy recovery system reduces drying energy consumption by 30%.

Environmental solutions

• Wastewater recycling utilization rate ≥95

• Tailings dry storage technology

• Exhaust gas treatment system (standardized discharge)

Typical Application Cases

Sulfide Lead-Zinc Ore Project

• Raw ore grade: 2.5% Pb, 3.8% Zn

• Lead concentrate: 65% Pb, 92% recovery rate

• Zinc concentrate: 52% Zn, 89% recovery

Complex lead-zinc ore project

• Adoption of asynchronous flotation process

• 15% increase in Pb-Zn recovery

High Sulfur Lead-Zinc Ore Project

• Synchronous recovery of sulfur concentrate (sulfur grade ≥45%)

• Sulfur recovery ≥85

Customized Services

Ore characterization study

• Process mineralogical analysis

• Selectivity tests

• Expanded Continuity Tests

Process schematic design

• Process configuration optimization (selection of the best process according to ore properties)

• Specialized flotation chemicals formulation development

• Process design drawings

Production support services

• Equipment production and supply

• Equipment installation and commissioning

• Production technology training

• Continuous process optimization

This lead-zinc ore beneficiation solution can choose the most suitable flotation process according to specific ore properties (lead-zinc endowment state, symbiotic relationship, oxidation rate, etc.), to ensure the best recovery rate and techno-economic indexes.

Welcome to contact us for detailed lead-zinc ore beneficiation solution and quotation!