Method of calcining a raw material to obtain a cementitious material

A method of producing a cementitious material, comprising-the steps of:

• providing a raw material,
• heating the raw material to a temperature of 100-120° C., said heating comprising at least the following steps:
• a first heating step comprising heating the raw material to a first temperature in heat exchange with a heat exchanger fluid circulating in a first circulation loop,
• a second heating step comprising heating the raw material to a second temperature in heat exchange with a heat exchanger fluid circulating in a second circulation loop, the second temperature being higher than the first temperature,
• calcining the heated raw material in an at least partly electrically heated calciner to obtain a calcined material,
• cooling the calcined material to a temperature of <150° C. for obtaining the cementitious material,
• wherein sensible heat removed from the calcined material in said cooling is used as a heat source for heating the heat exchanger fluid circulating in the first and/or second circulation loop.