A class of cement based on a new cementitous phase Alinite has been produced by clinkering at 1150 degrees C. An important empirical correlation between free lime of Alinite cement clinker and weight percent of CaCl2 content in raw mix in various temperatures has been established for the purpose of clinker mix design. The optimum CaCl2 addition to the raw mix is found to be 5-6% by weight. Alinite clinkers which are very friable can be produced at 1150 degrees C. In addition to the substantial energy saving, these cements have also been found to be relatively insensitive to various impurities in the raw mix. This low temperature clinkering route thus appears to be a promising method of converting industrial wastes into hydraulic setting cements.