Abstract:
Tecnored SA has acquired a consolidated knowledge of briquetting through the development of the Tecnored process, which uses briquettes as raw materials. Now, the company is developing briquettes that also help in the decarbonization of the AF/LD route. One such product is CBB, made from metallurgical coal, charcoal, and iron ore. CBB can partially or fully replace small-coke, reducing blast furnace temperature, coke consumption, and CO2 emissions. The study describes the development of CBB at laboratory scale, considering different carbon sources, binders and carbonization variables. The results show that CBB made with more flowable coal has higher mechanical strength. Briquettes carbonized at lower temperatures also have higher mechanical strength but lower metallization. However, even with lower metallization, CBB showed high reactivity, with gasification start temperature of 902ºC. These results indicate that CBB can reduce fuel consumption and CO2 emissions.