Life Cycle Assessment of Silicate Cementitious Material Production Using Calcium Carbide Sludge

Abstract

The environmental impacts of cement production using two pre-drying processes, i.e., coal-fired pre-drying process and pre-drying process by waste heat from kiln tail process were analyzed and compared through life cycle assessment (LCA). The results show that the energy consumption, GWP, AP, POCP, HT and EP of pre-drying process by waste heat from kiln tail are about 1%, 2%, 5.2%, 5% ,3.5% and 3.8% lower than coal-fired process; therefore the application of pre-drying process by waste heat from kiln tail has obvious environmental benefits.

Calcium‐Based Sustainable Chemical Technologies for Total Carbon Recycling

“…CCR is ready to use after simplep redrying through coal-fired or kiln tail processes to reduce the water content. [179] CCR productionc auses no additional CO 2 emissions and can even consume carbon dioxide to produce valuable building blocks. [180] Similarly to conventional cement-making technology, the productiono fc ement from CCR involves transportation, coal production, power generation,a nd cement clinker production ( Figure 41).…”