UTILIZATION OF WASTE FROM NON - FERROUS METALLURGY
How to extract profits from industrial waste?
Although the production of non-ferrous metals is necessary and profitable, entails large-scale devastation of the environment, mainly as a result of the disposal of waste: slag, ash, dust, etc. They contain heavy metals in high concentrations and a number of toxic substances and are classified as hazardous waste. They are landfilled, since there is no widely implemented and economically justified method of effective neutralization of such waste.
Ecological Projects Poland, as part of its research and implementation activities, has started work aimed at the implementation on an industrial scale of efficient and economical technology of metallurgical waste management.
Technology goes through two basic stages:
1. waste neutralization – melting in a plasma reactor with simultaneous separation of metals contained in the waste. Solidified product, vitrificate, is a hard and resistant glassy material, completely neutral to the environment. It can be used e.g. in the construction industry as aggregate or filler, but its value is low which does not guarantee sufficient profitability of the process.
2. production of cellular insulating elements – the vitrificate is transformed into a foamed insulation material in the form of plates, blocks and other shapes. The gas bubble enclosed in the material make it light (about 200 kg / m3) and is an excellent heat insulator with very wide range of applications with high added value.