Título

FIRST SUCCESSFUL PULVERIZED COAL INJECTION START-UP IN RUSSIA AT EVRAZ NTMK

FIRST SUCCESSFUL PULVERIZED COAL INJECTION START-UP IN RUSSIA AT EVRAZ NTMK

Autoria

Kushnarev, Alexey; Bermes, Philipp; Mahowald, Pierre; Stamatakis, Georges; Becker, Stephan; Oliveira, André; Simões, Jean-Paul

DOI

10.5151/2594-357X-23954

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Resumo

EVRAZ is a large vertically-integrated steel and mining company with operations in the Russian Federation, Ukraine, Europe, USA, Canada and South Africa and employs approximately 110 000 people. EVRAZ is among the top 20 largest steel producers in the world. EVRAZ NTMK located in Nizhny Tagil, Russia is an integrated steel production plant, which in 2010 produced 4.3 million tons of hot metal with two modern blast furnaces. Having made good experience with Paul Wurth installations such as copper staves and their compatibility with the high productivity operation of NTMK, Paul Wurth was awarded with the installation of grinding and drying as well as pulverized coal plant. On 19.12.2012 EVRAZ Nizhny Tagil Metallurgical Plant started successfully the injection of pulverized coal into their blast furnace Nr. 5. As scheduled, blast furnace No. 6 followed approximately 1 month later. Initially operated at natural gas injection rates of 90 kg/tHM, both blast furnaces are now operated at combined natural gas and pulverized coal injection rates above 180 kg/tHM. The ramp-up to nominal injection rates was achieved in less than 2 months after PCI start-up. In order to realize this ambitious target and to avoid any negative impact on the production rates, Paul Wurth actively assisted NTMK in the PCI ramp-up process. Production rates of 3.9 t/d/m3 have been reached in average.

 

EVRAZ is a large vertically-integrated steel and mining company with operations in the Russian Federation, Ukraine, Europe, USA, Canada and South Africa and employs approximately 110 000 people. EVRAZ is among the top 20 largest steel producers in the world. EVRAZ NTMK located in Nizhny Tagil, Russia is an integrated steel production plant, which in 2010 produced 4.3 million tons of hot metal with two modern blast furnaces. Having made good experience with Paul Wurth installations such as copper staves and their compatibility with the high productivity operation of NTMK, Paul Wurth was awarded with the installation of grinding and drying as well as pulverized coal plant. On 19.12.2012 EVRAZ Nizhny Tagil Metallurgical Plant started successfully the injection of pulverized coal into their blast furnace Nr. 5. As scheduled, blast furnace No. 6 followed approximately 1 month later. Initially operated at natural gas injection rates of 90 kg/tHM, both blast furnaces are now operated at combined natural gas and pulverized coal injection rates above 180 kg/tHM. The ramp-up to nominal injection rates was achieved in less than 2 months after PCI start-up. In order to realize this ambitious target and to avoid any negative impact on the production rates, Paul Wurth actively assisted NTMK in the PCI ramp-up process. Production rates of 3.9 t/d/m3 have been reached in average.

Palavras-chave

Pulverized coal injection; Commissioning; Operational results; Ramp-up; Co-injection.

Pulverized coal injection; Commissioning; Operational results; Ramp-up; Co-injection.