The former scheme delineates the manufacturing procedure of glass containers, whereas the latter one depicts how used glass is recycled.
Looking from an overall perspective, it is readily apparent that, three main raw materials go through four distinct stages to create thr end product. Moreover, it requires five phases to turn ussed glass into new glass items.
To commence with, sand, soda ash, limestone, and other chemicals are mixed together. Afterwards, this mixture is heated in a glass furnace at roughly 1500°C to produce molten glass, and then the molten glass can be shaped, by blowing, to form the final products.
The recycling operation starts with the collection of used glass products. During the second phase, the collected glass is sorted according to its colour, and then is cleaned in order to eliminate any residue and dirtiness. In the subsequent step, it passes through a crushing machine where it is chopped into small pieces and next is heated to be melted. At the final phase, the resulting molten glass is moulded to form new items.