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Storm damage at Ketton hits Hanson UK’s emissions performance

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World Cement,

Carbon emissions per tonne of cement rose at Hanson UK last year, according to the company’s latest sustainability report. The increase comes after storm-damage at the company’s Ketton cement plant limited the amount of alternative fuels that could be used in the kiln.

“Use of alternative fuels in our cement kilns dropped principally due to an incident early in the year, when the main stack at our Ketton works in Rutland was blown down in a storm, causing damage to the kiln bypass system” the company said in its Sustainability 2017 report.

“As well as reducing clinker production for three months, the stack failure also limited the quantity of alternative fuels that could be used in the kiln until the bypass system was repaired,” the company continued. “This incident also had a known on effect on biomass fuel use.”

Alternative fuel use dropped to a substitution rate of 45% from 53% in 2015. Overall, 0.168 million t of alternative fuels were used in the company’s kilns in 2016.

On the biomass side, usage was also hit by supply constraints, as suppliers of meat and bone meal increasingly use the fuel themselves for power generation. The proportion of cement fuel derived from biomass was down to 14% as a result, from 19% in 2015. The company is targeting 35% use of biofuel by 2020.

Emissions of CO2e per tonne of cement rose 6% in 2016, offsetting a 12% fall in emissions per tonne of product in the company’s concrete aggregates, and asphalt businesses. Overall the company’s emissions stood at 51.01 kg of CO2e per tonne of product.

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