Shaft kiln. 100% cement dust was recycled. When using this dataset for Life Cycle Assessment (LCA), pay particular attention to the system boundaries and stages defined within the shaft kiln cement production process. It includes stages such as raw material crushing, clinker generation, and the cement milling process. Ensure that transportation, direct emissions, energy consumption, and infrastructure are also included in the analysis, as they are critical for the LCA of cement production. Be sure to incorporate the provided recycling rates for cement dust and apply the specific direct emissions data accordingly. Utilize the China Cement Industry Cleaner Production Standard (HJ 467-2009) for direct SO2 and NOx emissions to ensure conformity with local regulations when assessing environmental impact.