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Archive for the ‘Shredders for kerbside\bulky waste ’ category
Smaltimento e recupero Materassi
July 15th, 2010Materials that WRS machines can process: Steel
June 28th, 2010Here’s an example of ferrous/metallic waste and scrap which can be processed by WRS machinery and systems:
In the photo we see stainless steel prior to processing. The material can be processed by a shredder such as the Thor WD 280\20 model: the shredder has been designed to perform volumetric reduction and roughing of the material for later recycling and value enhancement processes.
Nomen Omen: The Zeus shredder
June 21st, 2010Nomen Omen, meaning it’s all in the name. At WRS, we like everything to have its own special meaning and to have a specific purpose, starting with the products we construct, the very names of which must tell us something about them.
For instance, the ZEUS shredder
The ZEUS shredder is a particularly sturdy single shaft machine. It features a capacious cutting chamber and is driven by a powerful electric motor. Zeus can be used for grinding/shredding and volume reduction, and later processing of municipal and industrial waste, wood and plastic.
According to Greek mythology, Zeus was the god of the sky, of thunder and lightning. Zeus was the most powerful of the gods. His strength was bodied forth in his thunder and lightning. Electrical discharge fits in with what the WRS Zeus shredder is all about, since its special feature is that it’s electricity-driven − enabling processing power and reliability.
Nomen Omen: Ares shredders
June 3rd, 2010Nomen Omen, meaning it’s all in the name. At WRS, we like everything to have its own special meaning and to have a specific purpose, starting with the products we construct, the very names of which must tell us something about them.
For instance, the ARES shredder line.
ARES grinders are single shaft machines used for volumetric reduction of waste. They are used for grinding/shredding various materials, such as wood and loppings/prunings etc., plastic and rubber, organic waste and urban waste. The ARES shredder can process kerbside waste (piping, drums and bins) for use at recycling plants.
According to the ancient Greeks, Ares was the god who represented the most savage and brutal face of war. Ares’ fury, violence and impetuousness were absolute. This idea of a concentrate of energy and force fits in with the WRS machinery that bears the Ares name: a force that ‘takes no prisoners’, that grinds/shreds various kinds of waste including the bulkiest and most stubborn… pitilessly.
Disposal of refrigerators and freezers
March 12th, 2010Up to 60% of the weight in steel and 10% of the polyurethane can be retrieved from the processing of refrigerators and freezers (weight range: 40-70 Kg). First and foremost, such operations positively impact the environment (reduced greenhouse effect and ozone hole, energy savings generated by recycling), and precious raw materials are made available to industry.
The following are the stages for processing and reclamation of refrigerators and freezers:
* removal of refrigerant gas from circuit: the gas is then stored in a cryogenic system, preventing atmospheric dispersion;
* removal of compressor and recovery of oil;
* preliminary shredding of the casing by mechanical means (machinery equipped with blades or chains);
* the material reaches a second stage consisting in further shredding, from which a mixture of plastic and metallic components is obtained;
* the final stage consists in selection and separation of individual materials: iron, aluminium, copper, plastic, polyurethane and glass, by means of magnet, filter and aspirator systems.
This manner of processing refrigerators and freezers at dedicated processing plants generates an approx. 90% raw material quotient, to be directed toward re-use.
The very latest types of systems for this specific process can handle even 40 units per hour, with total automation, minimizing manual labour (for shredding, often only max. 3 operatives are required).
Disposal of discarded tires
February 4th, 2010The disposal of discarded tires in landfills implies a number of problems, due to their physical and chemical characteristics:
- a potential fire hazard;
- decomposition time of over 100 years;
- instability of the piles;
- encourages the proliferation of insects and rats;
From worn-out tires it is possible to retrieve both raw materials and energy.
That is why it has long been established that it is more convenient to dispose of discarded tires using solutions that permit the recovery of reusable materials, with the scope of preventing environmental pollution and recuperating reusable resources and materials that can be used in industrial productive cycles.
It is estimated that in Europe alone every year there are over 2,000,000 tons of discarded tires.
What is derived from properly treated discarded tires?
• materials for surfaces devoted to recreational or sports activities;
• combination products made of rubber;
• friction materials;
• rubber tires or wheels;
• bitumen and modified road bitumen;
• extruded rubber or plastic
What are the processing stages required to convert discarded tires into reusable material?
Usually, the first stage of processing is called “bead breaking” and is the process which removes the steel frame (heel) found inside the tire;
the second phase foresees the volumetric reduction of the tire called “chopping”;
the next stage (third) is shredding of the rubber;
the fourth stage is called granulation: the pieces of discarded tires previously shredded are reduced to very fine granules;
the fifth stage is that of pulverization.
It is then possible to include a pressing system in the process, to transform the granule into a finished product.
There are various types of systems for processing discarded tires (click to view one).
Bulky wastes: how to reduce the volume?
January 15th, 2010In large industries as in the home it has become increasingly important and necessary to reduce bulky wastes.
In fact, reducing bulky wastes is the first step towards facilitating subsequent processing operations.
The equipment that make this operation possible (reduce the volume of bulky waste), is usually mechanical and is known as “Grinders and Shredders”.
The grinders and shredders work on bulky wastes and reduce the volume (including predefined sizes), by grinding and cutting the components of bulky waste itself.
The type of grinder or shredder to be used is usually chosen based on the following parameters:
1. hourly capacity of the wastes to be processed
2. final product size to be achieved.
An example of a two-shaft shredder is THANIT
