THE CONTRIBUTION OF ORGANIC ACIDS AND ENRICHED INDUSTRIAL BY-PRODUCTS IN ENERGY CONSERVATION DURING CEMENT CLINKER PRODUCTION V KASSELOURI-RIGOPOULOU AND S ANTIOHOS

The decomposition of CaCO₃ is considered as the most energy demanding reaction taking place during clinkering processes. The present work refers to a new approach°for the energy conservation problem in the cement industry, by examining the utilization of°different organic acids as additives during the thermal decomposition of limestone.°Measurements by means of differential scanning calorimetry (DSC), XRD and TG-DTA°were carried out on limestone mixed with oxalic and citric acids. The results suggest that°when limestone is mixed with an appropriate organic acid in the presence of water, a CaCO₃-°acid reaction occurs which results in the partial decomposition of limestone. Therefore, the°respective amount of CaCO₃ to be decomposed at higher temperatures is diminished. A case°study involving an enriched in the aforementioned acids by-product of the sugar industry,°molasses, was also performed to evaluate its utilization potential serving the same objectives.°This liquid has been used to decompose limestone under analogous experimental conditions.°Results have shown that the organic liquid has a remarkable effect upon the decomposition of°limestone leaving the physical and chemical characteristics of the final product unaffected.

• INTRODUCTION

• EXPERIMENTAL PROCEDURES

• RESULTS AND DISCUSSION

• CONCLUSIONS

• REFERENCES