• Calumite is produced from blast furnace slag, a by-product of the iron-making process. It’s use in the glass batch reduces the need for quarrying virgin raw materials by partially replacing limestone, dolomite and alumina containing minerals.
  • Use of Calumite reduces the energy required to melt the glass batch, reducing energy consumption and associated emissions
  • Use of Calumite reduces the levels of carbonates added to the batch therefore significantly reducing process CO2 emissions.

Hanson Sustainability Policy

Calumite Ltd is a division of Hanson UK. For the full sustainability report of Hanson UK please click here


BS OHSAS 18001:2007

BS EN ISO 14001:2015

BS EN ISO 9001:2015