Guilherme Liziero Ruggio da Silva

Characterization of Metallurgical Coke Produced with Coal Mixtures and Waste Tires

The use of scrap tires in the coal blends is an alternative to reduction of coke production costs as well as mitigates the impact caused by tire accumulation in the environment. Tests were carried out on a pilot scale, with coal blends and waste tire in 4 levels and 3 particle sizes, in order to assess the impact on the produced coke quality, especially on the Strength after Reaction with CO2 - CSR and Drum Index (DI150-15). In addition, it evaluated the mechanical resistance to compression, punctual chemical composition by Energy Dispersive Spectroscopy (EDS) analysis beyond the carbonaceous matrix-tire interface by SEM microscopy. The results from the coking tests showed that addition of up to 3% of the average ground tire (20-30mm) with steel mesh, raised either as CSR DI150-15, making feasible added also from a technical point of view.

A INFLUÊNCIA DA VIBRAÇÃO MECÂNICA DA CARGA DE CARVÃO NOS ÍNDICES CSR E CRI DO COQUE METALÚRGICO

Steelmaking companies must be always being looking for innovation and how to develop their production methods, because this is unquestionable very important to keep the company competitiveness on world’s market. This research is about an improvement of metallurgical coke production on coke ovens by coal charge mechanical vibration, on this way will be possible a bigger oven loading and an utilization of more poor coal blends, and, consequently, cheaper. The scientific research has happened on experimental scale on a 4,5 kg capacity coke oven, The mechanical vibration was produced by a mechanical immersion vibrator, the one commonly used for concrete compacting on civil construction. The coke produced increased by 21% of the CSR value and a 26% reduction of the CRI. The results obtained contradicts some results of the literature that report that the CSR and CRI are not influenced by loaded coal density, although these studies the densification technique used was stamp charging.