Jiangxi Mingxin's Dry Separation Crushing & Sorting Process for Waste Circuit Boards-Information-Jiangxi MingxinIn the field of waste circuit board resource recycling, the dry separation crushing and sorting process developed by Jiangxi Mingxin Metallurgical Equipment Co., Ltd. has broken through the bottlenecks of traditional treatment methods with its core advantages of "water-free operation, high purity and low loss", becoming a preferred solution for large-scale and green recycling in the industry. As a high-tech enterprise with over 30 years of experience in the metallurgical equipment sector and numerous core patents, Mingxin has deeply integrated precision crushing technology with multi-stage dry separation processes, establishing a full-process recycling system that combines environmental compliance and economic efficiency. This system completely eliminates reliance on water resources, realizing the dual value of resource recovery and ecological protection.
Water-free operation is a landmark advantage of Mingxin's dry separation process, fundamentally resolving the scenario limitations and environmental risks of traditional water-based separation technologies. The entire system requires no water throughout the operation, which not only avoids water resource consumption and wastewater treatment pressure, but also is well-suited for arid and water-scarce areas as well as production scenarios with strict water discharge requirements, significantly reducing initial project investment and long-term operating costs. Meanwhile, the process adopts a fully enclosed negative pressure design equipped with a high-efficiency pulse dust removal system, which can accurately capture fine dust generated during crushing and sorting with excellent dust treatment efficiency. Combined with the low-noise equipment structure design, it achieves full-dimensional compliance of waste gas, dust and noise emissions with relevant national standards, creating a clean and safe production environment.
The synergy of multi-stage crushing and composite separation technology has forged the high-efficiency recovery capacity and high-purity output advantage of Mingxin's dry separation process. The system adopts a three-stage progressive crushing process, integrating hobbing shear shredding, hammer crushing and cutter head grinding. Equipped with a precision temperature control device, the crushing temperature is kept below 80℃, which not only fully dissociates metal foils from resin and glass fibers in circuit boards, but also prevents material charring and harmful gas emissions, reducing pollutant release by 99% compared with traditional crushing methods. Subsequent multi-stage purification through magnetic separation, air flow gravity separation and high-voltage electrostatic separation achieves precise separation based on the differences in density and conductivity between metals and non-metals. The copper recovery rate can reach over 97%, the iron recovery rate exceeds 99%, and the epoxy resin recovery rate also reaches 97%. The separated non-metallic powder has extremely low metal content and can be directly used in the processing of composite materials such as wood-plastic materials and fireproof boards, realizing full resource utilization.