Per: Flávio Filipe Soares Viegas (LaSid), jerônimo augusto marmor da silva (lasid), Thallya Rodrigues da Silva (lasid), Cláudio Artur Bellan do Amaral (lasid), Gabriel Penna Kramer Lima (lasid), Eduardo osório (lasid), Hector Alejandro Picarte Fragoso (lasid), Bruno Flores (lasid), Antônio Cezar Farias Vilela (lasid)
Abstract:
Circularity and the zero-waste concept are crucial for sustainability and reducing environmental impacts. In the steel industry, innovative practices that promote the reuse of residual materials are essential to decrease dependence on natural resources and minimize waste generation. The substantial amount of waste tires presents an environmental challenge due to their significant volume and slow decomposition. This study assesses the reactivity of mixtures of waste tires and coal to oxygen, using a thermogravimetric analyzer to understand the materials' behavior, aiming at their injection into blast furnaces. For this purpose, mixtures of pulverized coal and waste tire were prepared at percentages of 70/30, 90/10, and 95/5. From the tests, it was observed that the ash content of the mixtures remained below or at the limit of 10% for PCI, except for the addition of 30% of P1. During the combustion of the waste tires, four distinct regions were identified due to their composition. The combustion behavior of the mixtures and the values obtained in the proximate analysis correspond to the sum of the individual behaviors of the components. The ignition temperature of the mixtures decreased with the addition of the tire, indicating better combustibility. The mixture containing 30% of P2 was the most efficient, reducing the ignition temperature, improving combustibility, and maintaining the ash content within the allowed limits for injections into blast furnaces.
