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The cement industry is estimated to emit 8% of global CO2 emissions. With more than 60% of this coming from the calcination of limestone as part of the process required to make clinker, replacing clinker with a low-carbon (i.e., low limestone) supplementary cementitious material (SCM) such as activated clay presents a viable solution to the industry’s environmental impact. In line with its MissionZero objective to enable zero carbon cement production by 2030, FLSmidth has developed a low-energy, low-emissions clay Gas Suspension Calciner process. As a result, high clinker substitution within the cement standards can achieve 40% reduction in power consumption, a >30% reduction in fuel use and a >40% reduction in CO2 emissions compared to the same cement quality/properties as a standard OPC.

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Flash Activation of Clay: High Product Quality and Energy Efficient Process

  • 会议论文

  • 发表日期：

    2025年

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  • Steven W. Miller,
  • Rasmus Franklin Momme

摘要

The cement industry is estimated to emit 8% of global CO2 emissions. With more than 60% of this coming from the calcination of limestone as part of the process required to make clinker, replacing clinker with a low-carbon (i.e., low limestone) supplementary cementitious material (SCM) such as activated clay presents a viable solution to the industry’s environmental impact. In line with its MissionZero objective to enable zero carbon cement production by 2030, FLSmidth has developed a low-energy, low-emissions clay Gas Suspension Calciner process. As a result, high clinker substitution within the cement standards can achieve 40% reduction in power consumption, a >30% reduction in fuel use and a >40% reduction in CO2 emissions compared to the same cement quality/properties as a standard OPC.