A modern tire is a very complex product. It consists of multiple layered components.
The raw materials used for tire production are: rubber (~50%), carbon black (~25%), textile (~5%), ZnO (~2%), sulfur (~1.5%), and steel belts and mesh (~15%). On elemental level a tire consists of the following chemical elements: about 76% carbon (C), 15% steel and Silica (Si), sulfur (S), and metals (Zn, Cu, Al, etc.).
Source: Dr. C. Gisele Jung and Ir. Jean-Paul Bouysset - Recovered Carbon Black from Tyre Pyrolysis. European Tyre Recycling Association, DEPTEC Life project November 2015 (https://docplayer.net/60487355-Recovered-carbon-black-from-tyre-pyrolysis.html).
Note: “tyre” is the British term for tire.
The feedstock for our patented G³C process is crumbed tire material which a result of tires shredded and grinded after removal of steel and textile. Crumbed tire generally weights about 80%+ of the source scrap tire. Depending on the desired product rCB grade, the output of our G³C process contains 25% to 40% of recovered Carbon Black (rCB, the quantity is lower for higher-grade rCB production, and higher for lower-grade rCB production) and 75% to 60% of oil and gas. The oil and gas are more than sufficient for internal energy needs, and the surplus can be sold for additional income or used for in-plant power production.
The silica, sulfur and metals contained in the scrap tire end up in the rCB as inorganic impurities. Such impurities need to be removed to a certain level to meet the specific rCB application requirements. For certain application, such as tires, impurities removal is minimal re not needed at all, other applications require thorough cleaning of the rCB from impurities Our proprietary G³C Enrichment technology was developed for selective removal of impurities in order to meet specific rCB application requirements.
Recently silica is increasingly used, especially in passenger tires. The diagram below shows increasing silica usage by the tire industry.
Source: Notch Consulting, Inc. report “Outlook for Reinforcing Fillers & Rubber Chemicals, Tire Technology Expo, 2018".
Our G³C Enrichment process can effectively remove the high silica content from rCB to meet the high purity requirements for semi-conductive applications (e.g. <0.5%). G³C purification capability opens new markets for the rCB industry.
- G3C Technologies Team