Electronic Waste Recycling Plants
Electronic waste recycling plants are important facilities for the protection of environment and human health reducing the hazardous streams of electronic equipments which have been used commonly in daily life. The primary goal of recycling process is to be designed green plants with sustainable approach seeing environmental and economic factors. In addition to ensuring resource conservation, e-waste recycling contributes the circular economy by recovering valuable metals. Electrical and electronic equipment (WEEE) which contains precious metals, steel, glass, and plastics can be recovered through the application of mechanical and chemical processes in two steps generally.
Electronic Waste Recyling Pre-Processing
Pre-processing starts with disassembly and dismantling steps to seperate materials according to their types such as metals, glass and plastics and eliminate potential exposure based on hazardous materials in electronic scraps after colection. Shredding system is designed to reduced the particle size of the material with the options of metal shredders, hammer and knife mills as suitable dimensions are achieved for the subsequent process. Mechanical seperation systems contain a number of equipments specialized by physical characteristic of materials. Magnetic seperation is most suitable technology for the seperation of ferromagnetic materials such as iron, steel and rare earth metals. Gravity seperators are used to remove non-metallic fractions such as fiber glass, plastic and other impuruties from e-waste streams.
Electronic Waste Recyling End Processing
End processing is next step that includes pyrometallurgical, electrometallurgical and hydrometallurgical treatments. Pyro-metallurgy has been used for enrichment of precious metals by melting the materials in a furnace at high temperatures. The slag phase contains plastics and refractory oxides in the process. The enriched mixture that contains cxopper, gold, silver, palladium and platinum is purified from other impurities by burning. Copper is extracted with electrolysis process at a high purity and low cost. Hydrometallurgical treatment is the most efficient method for recovery of desired metals because it requires less energy intensive and provides easy process control. Gold, silver, palladium, and platinum form a solution using selective leaching with a suitable acid in the chemical refining system. Targeted metals are precipitated by using specific chemical agent in the final of process. The recovery achieves to 99% purity when optimum process parameters like acid type, amount, concentration, and pH of solution are provided. If metals in the solution have same process parameters, the precipitation can’t occur at desired purity level. In this case, solvent extraction will offer a more effective solution. High amount of target metals with solvent extraction are processed at one time than other methods. The fundamental issue from the point of recycling mentality is to avoids air and water pollution during the process. Accordingly, treatment systems for air, water and ash which is remained end of the process are the most imperative units and must be integrated to the recycling plants.
PROSES MAKINA’S Recycling Equipments And Plants
Proses Makina’s recycling equipments and plants have designed to recycle the waste of Printed Circuit Boards (PCB) and electronic devices used in medical and defense within the frame of the European WEEE Directive constraints. Proses Makina’s main objective is to produce the most efficiently and high purity system for recovery of valuable resources in electrical and electronic equipment (WEEE) and provide the sustainable environment by reducing hazardous materials.
