CemVision has reported the successful conclusion of a large-scale production pilot of its limestone-free alternative clinker. CemVision produces clinker using 100% supplementary cementitious materials (SCMs) from the steel and mining sectors. Possible examples of waste streams that could be used as SCMs include ground granulated blast furnace slag (GGBFS) and alkali-activated mine tailings. CemVision says that its production process heats the raw materials using renewable electricity, and without the use of fossil fuels. The alternative clinker offers CO2 reductions of up to 100% compared with ordinary Portland cement (OPC) clinker. CemVision has opened an invitation to possible collaborators to help scale up production, with a target of hundreds of thousands of tonnes per year.
Chief technical officer Claes Kollberg said “We are a climate-first company, making high performance cement. With our competence and experience, it is our duty to produce the most environmentally friendly cement for each application.”