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NLMK Lipetsk Cuts H2S Emissions

Steel News - Published on Fri, 16 Oct 2020

Image Source: NLMK Lipetsk H2S Emissions
NLMK Lipetsk has launched an anhydrous cooling system for blast furnace slag as part of its environmental upgrade programme. This will enable it to reduce hydrogen sulfide emissions in the corresponding area by 3.5 times and keep the smell from this chemical compound to a minimum. The implementation of the complex marks NLMK Lipetsk's Blast Furnace Shop No. 1 (three blast furnaces) full transition to dry slag cooling technology. The complex was built in place of a slag dump that had been accumulating since the 1970s. Close to 6 million tonnes of various materials were processed ana more than 300,000 tonnes of iron were fed back into in steel production in the course of the project.

Previously, water was used for blast furnace slag cooling. When hot slag reacts with water, hydrogen sulfide, a chemical compound with a specific smell, is released. The smell can appear even when the concentration of the substance is below the set standard. The new system completely eliminates the need to use water. Advanced excavators will be used for slag handling and loading, capable of working in high temperatures and with increased productivity. Investment in the project exceeded RUB 2 billion.

The average monthly H2S concentration at the border of the NLMK Lipetsk sanitary protection zone is significantly lower than the standard, totaling close to 30-40% oF the maximum permissible concentration

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Posted By : Yogender Pancholi on Fri, 16 Oct 2020
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