Title

PROJETO CR298: ALTAS TAXAS DE INJEÇÃO DE CARVÃO COM BAIXO FUEL RATE NOS ALTOS FORNOS DA ARCELORMITTAL TUBARÃO

PROJECT CR298: HIGH PULVERIZED COAL RATE WITH LOW FUEL RATE IN ARCELORMITTAL BLAST FURNACES

Authorship

Sathler, Filipe; Nascimento Junior, Ramiro da Conceição do; Perdigão, Leonardo Passos; Ribeiro, Estefan Campos; Wasem, Luiz Augusto

Sathler, Filipe

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Nascimento Junior, Ramiro da Conceição do

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Perdigão, Leonardo Passos

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Ribeiro, Estefan Campos

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Wasem, Luiz Augusto

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DOI

10.5151/2594-357X-30633

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Abstract

O projeto CR298 se iniciou no final do segundo semestre de 2014 quando o Coque Rate (CR) médio era de 351,0 kg/t. A meta definida foi de atingir média mensal de CR de 298 kg/t em dezembro de 2016, permitindo aumento de produção com alta taxa de injeção de carvão PCI, porém, com baixo Fuel Rate, garantindo competitividade de mercado. Sendo assim, foi desenvolvido e divulgado um novo modelo mental de operação, processo, manutenção e gestão, envolvendo toda a área de Redução, Utilidades e Aciaria. Várias premissas técnicas foram estabelecidas com um plano de ação detalhado para garantir estabilidade no processo dos altos fornos de forma a obter este resultado. A meta foi atingida antes mesmo do planejado: CR 291,3 kg/t em Maio de 2016 e em 2016 a média anual foi de 297,0 kg/t, com Fuel Rate de 484,4 kg/t.

The project CR298 started at second half of 2014 when Coke Rate annual average was 351,0 kg/t. The target was to achieve sustainably Coke Rate monthly average below 298 kg/t in December 2016, maximizing production with high pulverized coal injection (PCI) rate but low Fuel Rate to guarantee market competitiveness. Hence, it was necessary to develop and spread a new mind set in operation, process, maintenance and management involving all Ironmaking, Energy and Steel Areas. Some technical premises were stablished with a detailed action plan to ensure the operational and process blast furnaces stability in order to obtain the proposed results. The target was achieved before than planned: CR 291,3 kg/t in May 2016 and the 2016 annual average was 297,0 kg/t with Fuel Rate 484,4 kg/t. Therefore, it was a successful project that continues in constant improvement.

Keywords

Alto Forno, Coque Rate, Alta Taxa de Injeção, Fuel Rate

Blast Furnace, Coke Rate, High Coal Injection, Fuel Rate.