Background on recycling

As the total number of wind power installations continues to grow globally, wind power facilities installed in earlier periods are reaching the end of their operational life, resulting in a large number of wind turbine blades that need to be scrapped and recycled.

Introduction to Fiberglass Blades

Wind turbine blades are primarily constructed from fiberglass-reinforced composite materials. Glass fiber is produced by melting and drawing silica-based raw materials into fine filaments, resulting in a lightweight yet exceptionally strong material. Its key properties include:

High strength-to-weight ratio: With low density and excellent tensile strength, fiberglass significantly reduces blade weight while withstanding extreme aerodynamic and mechanical loads over decades of operation.

Superior durability: The material offers outstanding chemical stability, corrosion resistance, and electrical insulation, ensuring reliable performance in harsh onshore and offshore environments.

Design flexibility: Fiberglass composites can be molded into complex aerodynamic profiles, optimizing energy capture efficiency across varying wind conditions.
These characteristics make fiberglass the dominant material in modern blade manufacturing. However, this same durability creates a significant end-of-life challenge — the very properties that ensure 20–25 years of operational performance also make blades extremely difficult to break down and recycle through conventional methods.

Recycling process

The recycling of waste fiberglass blades follows a systematic three-stage process: first, low-speed shredders equipped with heavy-duty blades cut the blades into 50-100mm fragments, preparing them for refinement while minimizing fiber damage and dust generation; next, the pre-shredded fragments enter a hammer mill where high-speed rotating hammers deliver repeated impact and shear forces to significantly reduce particle size and begin separating fiber bundles from the resin matrix; finally, the material proceeds to PNMP turbo pulverizers where high-speed grinding media creates impact and friction to produce fine powder, which is then classified by particle size through a sieving system to ensure uniform quality—transforming the final graded fiberglass powder into a reusable resource for manufacturing new composite products, filler materials, or other industrial applications.

Advantages

Efficient crushing and grinding technology allows the blades to be quickly crushed to the required size, increasing recycling efficiency.
By adjusting the parameters of the crushing and grinding equipment, the particle size of the recycled glass fiber particles can be precisely controlled to meet the needs of different reuse areas.
The recycled glass fiber particles still have good strength, durability and chemical stability, making them suitable for use in the manufacture of high-quality recycled products.

Related Machines

PNMP Turbo Pulverizer