Recycling Industry

Core Application Scenarios and Functions

1. Construction waste recycling

Sorting process:

The mining screen is used for multi-stage screening of crushed construction waste (concrete blocks, bricks and tiles, wood, plastic, etc.) to separate recycled aggregates of different particle sizes (such as 0-5mm fine aggregate for mortar, 5-30mm coarse aggregate for roadbed filling).

effect:

Remove impurities: Separate non-aggregate components such as steel bars and plastics through the difference in screen aperture;

Improve recycling rate: Increase the resource utilization rate of construction waste from less than 30% to more than 70%;

Reduce costs: Recycled aggregate replaces natural sand and gravel, saving raw material procurement and transportation costs.

2. Waste Electronic Equipment (WEEE) Disposal

Separation of metals and non-metals:

The mine screen is combined with crushing equipment to crush waste electronic products (circuit boards, cables) and classify them according to particle size. The vibrating screen is used to separate metal particles (copper, aluminum) and non-metallic materials (plastics, ceramics).

effect:

Improve metal recovery rate: extract high-purity metal powder through precision sieve (such as 0.5-2mm aperture);

Reduce pollution: Screen out fine particles containing harmful substances such as lead and mercury to reduce environmental risks.

3. Dismantling of scrapped cars

Crushing residue sorting:

After magnetic separation of automobile crushing residue (ASR), the mine screen separates non-ferrous metals (aluminum, zinc), plastics and glass fibers from the remaining materials.

effect:

Refined recycling: multi-layer screens (such as 10mm, 5mm, 2mm) achieve multi-level sorting;

Maximizing resources: The recycling rate is increased to over 85%, reducing the amount of landfill.

4. Plastic recycling

Color and material sorting:

High-frequency vibrating screens separate crushed plastic fragments (such as PET bottle flakes and HDPE granules) by particle size, and optical sorting technology is used to improve purity.

effect:

Control the quality of recycled materials: Screen out impurities and discolored particles to ensure that the recycled plastic meets food grade or industrial grade standards;

Increase added value: The price of high-purity recycled plastics can be 30%-50% higher than that of mixed materials.

5. Metal scrap recycling

Pretreatment before smelting:

Mineral screens are used to sort scrap steel, aluminum chips and other metal waste, remove dirt, oil and other impurities, and meet the feeding requirements of electric furnaces or smelting furnaces.

effect:

Reduce energy consumption: The purity of metal is improved after screening, reducing energy waste during smelting;

Extend equipment life: reduce corrosion of the furnace wall caused by impurities.

Technical types and applicable scenarios of mine screens

1. Vibrating screen (linear/circular vibrating screen)

Applicable scenarios:

Grading of recycled aggregates from construction waste and sorting of metal waste.

Technical features:

Large processing capacity (200-1000 tons/hour), suitable for large-scale recycling lines;

The screen material is mostly high manganese steel or polyurethane, which has strong impact resistance.

2. Drum screen

Applicable scenarios:

Primary sorting of electronic waste and pre-screening of plastic fragments.

Technical features:

Simple structure, suitable for materials with high moisture content or viscosity;

The sieve holes can be customized (5-50mm) to separate large impurities.

3. Airflow screen (cyclone screen)

Applicable scenarios:

Ultrafine powder recovery (such as lithium battery positive electrode materials, precious metal dust).

Technical features:

Screening accuracy is above 400 mesh;

No mechanical vibration, suitable for lightweight materials that are prone to dust.

4. High frequency vibrating screen

Applicable scenarios:

Fine-particle metal powder recovery and plastic micropowder sorting.

Technical features:

High-frequency micro-vibration, anti-blocking hole design;

The screen has a long service life (6-12 months for polyurethane material).

Key Role and Industry Value

Improve recycling efficiency

Through multi-stage screening, "fine sorting" is achieved, and the metal recovery rate is increased by 20%-40%;

The production cycle of recycled aggregates from construction waste is shortened by more than 30%.

Typical Cases

1. Construction waste recycling project:

An environmental protection company uses the "jaw crusher + impact crusher + three-layer vibrating screen" process to convert demolition waste into 0-4.75mm, 4.75-9.5mm, and 9.5-31.5mm recycled aggregates for municipal road construction, with an annual processing capacity of 1 million tons.

2. Electronic waste metal recycling:

A recycling company uses a high-frequency vibrating screen (aperture 0.3mm) to sort circuit board scraps, increasing the copper recovery rate from 75% to 92% and increasing annual revenue by US$3 million.

3. Plastic bottle recycling line:

The drum screen pre-screens label fragments, and the airflow screen selects 0.5-2mm PET bottle flakes with a purity of 99.5%, meeting food-grade recycling requirements.