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French OTR tires, or off-the-road tires, are designed for complex terrain and extreme operating environments. They are mainly used for heavy machinery and special vehicles on non-paved roads.
The durability and large size of OTR tires make it a major challenge in recycling and disposal. The average diameter of OTR tires exceeds 2.5 meters, and some mining truck tires can reach 4 meters. In addition, the weight of a single OTR tire can reach 3-5 tons. Proper recycling of OTR tires requires an efficient shredding solution. This article introduces the special shredding equipment used in the OTR tire recycling process.
OTR Tire Shredders
When recycling OTR tires, the process typically involves cutting the tires into blocks, separating metal components, and then shredding them further.
En OTR tire shredder is mainly composed of a feeding system, a shredding system, a power system, an electrical control system, and other parts. When working, the waste OTR tire blocks are transported to the shredding chamber through the feeding system. The blades in the shredding system rotate at high speed under the drive of the power system to cut, tear and squeeze the tires. They are broken into smaller blocks or strips for further processing.
Features of OTR Tire Shredder
Powerful shredding capacity: Since OTR tires are usually large in size, complex in structure and tough in rubber texture, OTR tire shredders are equipped with high-power motors and specially designed blades. The blades are generally made of high-strength alloy steel, with good wear resistance and cutting performance, which can effectively cope with the shredding needs of OTR tires.
High reliability: The key components of the equipment, such as the main shaft, bearings, etc., are made of high-quality materials and are carefully processed and assembled to ensure the stability and reliability of the equipment under long-term and high-load operation.
High degree of automation: It has an advanced electrical control system that can realize functions such as automatic feeding, automatic shredding and overload protection. The operator only needs to place the tire at the feed port, and the equipment can complete the entire shredding process according to the preset program. When the equipment is overloaded, the control system will automatically stop running to avoid equipment damage.
Adjustability: The blade gap of some shredders can be adjusted as needed to control the size of the crushed material to meet the requirements of different users for material particle size.
Types of OTR Tire Shredders
Features two counter-rotating shafts with sharp blades.
Provides high torque to cut through tough rubber and metal components.
Suitable for initial shredding into coarse chunks or strips.
Utilizes four shafts (two sets of counter-rotating shafts) for greater cutting force.
Handles tougher materials like steel-reinforced rubber.
Produces finer and more uniform shredded pieces for downstream processing.
Key Differences
| Feature | Dual-Shaft Shredder | Quad-Shaft Shredder |
| Purpose | Initial shredding | Secondary shredding |
| Output Size | Coarse chunks or strips | Smaller, manageable pieces |
| Cutting Force | High | Higher |
OTR Tire Shredding Process
Pre-Treatment: Remove debris and metal rims from the tire to enhance efficiency and reduce blade wear.
Shredding: Process pre-treated tires into smaller fragments depending on equipment settings and user requirements.
Post-Treatment: Further process shredded pieces into rubber granules using grinders or conduct pyrolysis to extract valuable resources like carbon black, steel wire, and fuel oil.
Applications
Tire Recycling Companies: Use OTR tire shredders for initial processing before selling materials or conducting further recycling steps to generate economic value.
Rubber Product Manufacturers: Process waste tires as raw materials for new rubber products such as tiles or waterproof membranes, reducing costs while promoting environmental responsibility.
