CISDI’s C-H reducing, reusing and recycling low-carbon tech 3R is now setting an important milestone in reducing carbon in the blast furnace-basic oxygen furnace process at Hebei Zongheng Steel.

•          The invention means conventional, gas-fueled energy systems for blast furnaces can become a thing of the past, and plays a big part in the transformation from procedure-based carbon recycling to flow-based.

•          3R has reduced each furnace’s fuel ratio by 20 to 30kg per tonne of hot metal, based on a 5kg per tonne decrease in coke ratio to 8kg/t.

•          Its average gas replacement ratio ranges from 0.35 to 0.6kg per cubic metre, which is equivalent to a carbon reduction of around 10 per cent, compared with China’s conventional furnaces of the same volume.

•          3R will bring about an annual carbon emissions reduction of 500,000 tonnes and help save production costs of US$1.40-4.19 per tonne of hot metal, totalling an annual cost reduction of US$ 31.97 million.

The onsite decarbonising system for CISDI’s 3R low-carbon blast furnace