A new diagnosis
There are no limits set to the recycling of metals because they can Ik? remelted as scrap infinitely. Of course, metals have to be separated from nunmetallic impurities, and different metals have to he sorted into pure fractions to be used effectively as secondary raw materials.
When sdap is used in place of primary raw materials, not only are resources preserved bur energy is saved in most casts as well. Furthermore, production costs can be reduced considerably.
Additionally, the resources of the planet are exhaustible, making it more important to use secondary raw materials. By using scrap metal in the production of aluminium, for example, the energy-intensive electrolysis process is eliminated, thereby reducing the total energy costs to approximately 10% of primary production's energy price.
Ir also .should be noted that the mining of many ores for primary' production occurs in politically unstable regions, and sometimes under unsafe working conditions.
On the environmental front, ore mining and the associated processes produce railings and even 'toxic red mud.'
AWAY FROM THE 'OLD' STANDARD
The global demand for ferrous and non-ferrous metals is increasing each year. Industrial production in all areas of daily life devours an enormous quantity of aluininiuin and other nonferrous metals, such as copper, brass, nickel, tin, zinc and lead.
The Institute of Scrap Recycling Industries Inc. (ISRI) in the United States has created terms and specifications for mixed shredded sera]) metals, including zorba, zebra, Zeppelin, zurik and others.
The current method used for sorting zorba, zurik and metals of similar composition includes sink-float separation processes and sensor-based sorting systems that use camera technology.
The practice of manual sorting is still considerably widespread. Manual sorting results in high purity levels. The process, however, is cost-intensive in industrial countries and should, therefore.