Circuit Board Shredding and Sorting Machine

Waste circuit boards contain both recyclable metals, such as copper, and non-metallic materials, such as fiberglass and resin, resulting in a complex structure and interwoven components. If the process route is not designed properly, it will not only result in low recovery rates but also cause equipment wear and energy waste. The core value of a circuit board shredding and sorting production line lies in achieving efficient separation of metals and non-metals through a scientific process and specialized equipment.

Process Flow

The entire production line usually starts with pre-treatment. Clean waste circuit boards first enter a double-shaft shredder for primary crushing, cutting the entire board into uniformly sized pieces. The goal of this stage is not to crush the material to a very fine size, but to create stable and controllable feeding conditions for subsequent fine crushing.

The material after primary crushing enters a secondary fine crushing equipment, where the size is further reduced through shearing and impact. Subsequently, the material is processed into a particle size suitable for sorting using a pulverizer, allowing for the physical separation of metals and non-metals as much as possible, providing a foundation for downstream sorting.

Technical Principles

After crushing, the material enters the sorting system. First, using the difference in specific gravity, a gravity separation device is used to initially separate the denser metal particles (such as copper) from the lighter non-metallic materials (fiberglass, resin powder).

However, in actual operation, some metals are pulverized during the grinding process and mixed with non-metallic powders, making it difficult to completely separate them with single-stage gravity separation. At this point, electrostatic separation equipment plays a crucial role. Through the difference in conductivity of different materials, electrostatic separation can further accurately separate metal powder from non-metallic powder, significantly improving the overall recovery rate and product purity.

After multi-stage sorting, the metal and non-metallic materials are collected separately and can be directly used in subsequent deep processing or sales.

Compared to simple and crude direct crushing methods, this multi-stage crushing and combined sorting system for circuit boards is more suitable for long-term stable operation. The entire line has a high degree of automation, requires minimal manual intervention, and has controllable operating parameters, effectively reducing operating costs.

At the same time, the system has significant advantages in terms of recovery rate, environmental compliance, and equipment durability, meeting both resource recycling needs and current environmental requirements for electronic waste treatment. For companies looking to enter the e-waste recycling business, this mature and well-defined process solution is easier to implement and offers greater potential for sustained profitability.