Project Overview
With continuous urban renewal and infrastructure development, the amount of construction and renovation waste has increased significantly. Instead of sending these materials directly to landfill, recycling them into reusable resources has become a more sustainable solution.
In Nanjing, China, Zhongyi designed and supplied a construction waste recycling plant to process mixed construction waste, renovation waste, and aged waste materials. The system separates valuable components from waste streams and converts them into recycled aggregates for road construction, building materials, and other applications.
- Project Location: Nanjing, China
- Material: Construction waste, renovation waste, aged waste
- Processing Capacity: 1,000 m³/day
Project Background
The raw materials received by the plant came mainly from demolition sites, renovation projects, and old waste deposits. Unlike single-source waste, these materials contained a mixture of concrete blocks, bricks, tiles, wood, plastics, metals, and other impurities.
The main challenge for the customer was how to process this mixed waste efficiently while maintaining the quality of recycled products. Traditional manual sorting methods could not meet the required capacity, and direct landfill disposal would increase operating costs and waste valuable resources. Therefore, the project required a complete recycling system capable of crushing, separating, and recovering different materials in one continuous process.
Zhongyi C&D Waste Recycling Solution
Based on the material characteristics and output requirements, Zhongyi designed a complete recycling process integrating feeding, crushing, screening, magnetic separation, air separation, and sorting systems.
Main Equipment Configuration
The recycling system is equipped with a combination of feeding, screening, and air separation equipment to handle complex construction waste streams and improve material recovery efficiency.
| Equipment | Function |
| Apron Conveyor with Hopper | Provides stable feeding and temporary storage of mixed construction waste, ensuring continuous and uniform material flow into the recycling system. |
| Heavy-duty Bouncing Screen | Separates oversized and irregular materials through high-efficiency screening, improving the performance of downstream processing equipment. |
| Flip-Flow Scree | Performs fine screening of construction waste and helps separate materials according to particle size while handling sticky and mixed waste conditions. |
| Horizontal & Vertical Negative Pressure Windshifter | Removes lightweight impurities such as plastic, fabric, paper, and wood through controlled airflow separation, improving the purity of recycled aggregates. |
| Foam Air Separator | Specifically separates lightweight foam materials (EPS) and other low-density impurities from the recycled material stream. |
Production Line Process
Feeding → Pre-Screening → Crushing → Screening → Magnetic Separation → Air Separation → Final Product Output
Feeding and Pre-Screening System
At the beginning of the process, mixed construction waste is delivered into the feeding system and evenly transferred to the following equipment. The pre-screening stage removes oversized materials and separates unsuitable particles before crushing, helping improve the stability of the entire production line.
Crushing and Screening for Recycled Aggregate Production
After pre-processing, the waste enters the crushing stage where large concrete blocks, bricks, and other hard materials are reduced into smaller particles. Zhongyi crushing equipment is designed for handling abrasive construction waste and provides stable size reduction during continuous operation.
The crushed materials are then classified by multi-layer screening equipment into different sizes, such as 0–5 mm, 5–10 mm, and 10–20 mm recycled aggregates. These products can be used in road base construction, recycled brick manufacturing, and other building applications.
Separation of Metals and Lightweight Materials
To improve the quality of recycled aggregates, the system includes magnetic separation and air separation units. Magnetic separators recover ferrous metals from the material stream, while air separators remove lightweight impurities such as plastics, foam, fabric, and wood.
This separation process reduces impurities in the material stream and improves the quality and commercial value of the recycled products.
Recycled Products and Applications
The processed materials from this project are mainly used in:
| Recovered Material | Application |
| Recycled Aggregate | Road base, construction filling |
| Fine Aggregate | Recycled bricks, concrete products |
| Recovered Metal | Metal recycling |
| RDF/Lightweight Fraction | Energy recovery |
Project Summary
The Nanjing construction waste recycling project provides an effective way to handle mixed construction and renovation waste while recovering valuable resources. Through crushing, screening, magnetic separation, and air separation, the plant converts concrete, bricks, and other waste materials into reusable recycled aggregates and reduces reliance on landfill disposal.
At Xinzhongyi, we design recycling solutions based on actual project conditions, including waste characteristics, required capacity, and final product applications. From process design and equipment selection to installation support, we help customers build practical and reliable recycling plants.
Looking for a construction waste recycling solution? Contact Xinzhongyi to discuss your project requirements and get a customized system proposal from our engineering team.
