Jiangxi Mingxin's water-based crushing and recycling process for waste circuit boards demonstrates remarkable advantages in environmental protection and safety. This process adopts wet impact crushing technology, using water as the medium to achieve the crushing and dissociation of circuit boards. It avoids the common problems of dust diffusion and pyrolysis gas emissions in dry crushing at the source, completely eliminating the hidden danger of secondary pollution. The supporting variable-diameter water medium separation bed and closed-circuit water circulation system form a complete environmental protection loop. The filtered clear water is reused through the circulating water pipeline, which not only saves water resources but also controls pollutant emissions at an extremely low level. Assisted by a two-in-one dust removal device (cyclone dust collector + pulse dust collector), its dust, noise, and waste gas emissions all strictly comply with national standards, establishing a green recycling model of "physical separation replacing chemical treatment" and reducing harmful emissions by nearly 90% compared with traditional pyrometallurgy.
The resource recovery efficiency of this process ranks among the industry's leading levels. Through wet crushing, more than 95% of the crushed products reach the -1mm particle size, and the metal dissociation degree exceeds 90%, laying a high-quality material foundation for subsequent separation. Relying on its unique fluid distribution design, the core equipment - variable-diameter water medium separation bed - realizes the precise separation of fine-grained materials. As a result, the copper recovery rate is stably above 97%, the iron recovery rate exceeds 99%, and the purity of precious metals meets the requirements for further purification. At the same time, the recovery rate of epoxy resin and glass fiber in the non-metallic concentrate reaches 97%, which can be directly used as building material reinforcement or resin carrier for high-value utilization, forming a closed-loop system for the full-component recovery of metals and non-metals.
Technological innovation and industrial adaptability constitute the third major advantage of this process. Relying on a number of patented technologies (such as ZL02247015.8 - special crushing equipment for waste circuit boards), it has built a fully automated process of "pretreatment - wet crushing - variable-diameter separation - pressure filtration purification". The processing capacity of a single set of equipment reaches 500-800 kg/h, meeting the needs of large-scale production.
