Recycle friction material LIFE98 ENV/D/000537 - Pilot realization of the material cycle of friction materials
Overview
Background & policy context:
Friction liners (disc brake liners or drum brake liners) are mainly used in vehicle brakes. The volume of friction liners produced in Europe amounts to 150,000 tonnes/annum. At the point of replacement, the friction liners are only used to approximately 50%. Therefore, every year up to 75,000 tonnes of used friction liners are produced. These are normally disposed of as hazardous waste or partially smelted to low quality steel. In addition to the used liners, approximately 22,000 tonnes of filter dusts from the industrial production of friction liners are also produced every year. In the past, the car manufacturing industry used only original material for the production of brake liners. This project aimed to facilitate the use of used friction liners and filter dust to produce new brake linings.
Objectives:
The objective of the project was to develop a new system for the reprocessing of used friction liners and filter dust accumulated during the production process. Both fractions would be recovered for re-use in the friction liner production process. This would reduce the volume of waste going to disposal sites, reduce the use of raw material and as a result, reduce the disposal costs and the cost of friction liner material. Based on the results of a research project, which had investigated the redistribution of friction materials on a laboratory scale, the current project aimed to emulate larger-scale production. Another important objective was to demonstrate the complete material cycle ('from cradle to grave'), beginning with the production of the friction liner, its subsequent application in the car, its collection and recycling after use, and terminating with its re-use in the manufacturing of new friction liners. The cycle was an important precondition to ensure the recycling of friction materials and the benefits to the environment. The specific objectives of the project were:
- the realisation of a recycling plant
- procurement and assembly of machines and equipment
- a test run of the recycling plant
- the achievement of normal production in the recycling plant
- national and international organisation of the collection of old friction material
- identification of national and international markets for the recycled materials
- the dissemination of results.
In the case of a successful demonstration, a transfer of the technology to other European sites was envisaged. This would provide considerable environmental benefits, while at the same time also securing the transfer of know-how and technology.
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