Most glass cullet is reclaimed from kerbside pickups, recycling centers, and on occasion, manufacturers with a high volume of glass usage. Before being recycled, the glass is often sorted according to color, an important part of the recycling process as different colored glasses generally have different chemical properties and cannot be successfully recycled together. However, there are some facilities that do not require for cullet to be color sorted, as their processes are able to both decolorize and colorize glass cullet.
As with most forms of recycling, a major problem for glass cullet recyclers is contamination. Glass cullet is often contaminated with metals, ceramics, pyrex, general rubbish, and sometimes even syringes and medical waste. There are a variety of methods used to clean up glass cullet, and the most popular of these is outlined below.
The glass cullet is fed into a hopper 
which feeds it onto a conveyor belt. The glass cullet then travels along the conveyor belt, where magnets remove metals such as bottle caps, and other contaminants that have made their way into the cullet. The cullet then passes under a metal detector which removes any remaining pieces of glass cullet contaminated with metal. This process can be repeated several times until all the metals have been removed from the cullet.
Metals are not the only contaminants that can cause problems in glass cullet however, ceramics, plastics, and other rubbish can often infiltrate the cullet. These are usually picked out by hand by workers at picking stations, or by automated systems.
An automated method of removing ceramic contaminants in glass cullet recycling is known as “fine sizing” and essentially involves grinding and/or pulverizing the glass cullet. In either case, the glass cullet breaks down more easily than ceramic contaminants, and as the glass cullet becomes smaller and smaller, it is passed through a series of screens, leaving behind the more resilient ceramic contaminants, which can cause structural defects in the resulting glass products if not removed before the cullet is melted down and formed into new glass items, or sold to be crushed or powdered for inclusion in other materials, or to be used in other applications.
Glass Cullet Supplier
We supply all types of glass cullet. Please contact us through this form below and let us know your specific requirements. We will get back to you within a few hours