Tire Fire
Tire fires, where tires are stored, dumped or processed, exist in two forms: as fast-burning events, leading to almost immediate loss of control, and as slow-burning pyrolysis which can continue for over a decade. They are noted for being difficult to extinguish. Such fires produce a lot of smoke, which often carries toxic chemicals from the breakdown of rubber compounds while burning.
Tires are typically not prone to self-ignition as a tire must be heated to at least 400 °C for a period of several minutes prior to ignition. Therefore, tire fires are normally the result of arson or improper manipulation with open fire. However, it is possible for tires to spontaneously combust, especially in the case of shredded tires or tire "crumbs".
Extinguishing tire fires is difficult. The fire releases a dark, thick smoke that contains carbon monoxide, sulfur dioxide, and products of butadiene and styrene. A specific danger is posed by dripping hot fluids (which may cause burns) and valves shooting from the fire under pressure. Burning tires are heated and as they have a low thermal conductivity, they are difficult to cool down. Moreover, they frequently burn inside even if they are extinguished from outside, and easily reignite when hot. One possibility is to cover the fire with soil, reducing the supply of oxygen and exhaust of the thick dark toxic smoke. After extinguishing and cooling down (which may last several days), the site must be surveyed and toxic chemicals neutralized.
Read more about Tire Fire: Notable Tire Fires
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