Huang Xiao, Zhang Jinfang, Zhang Kechang
State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China.
Key Laboratory of Environmental Protection, Education Department of Guangxi Zhuang Autonomous Region, Guangxi University, Nanning, 530004, Guangxi, China.
Sci Rep. 2024 Dec 30;14(1):31825. doi: 10.1038/s41598-024-83179-9.
This study delves into the challenges posed by the low-temperature calcination of high-ferrite Portland cement (HFPC) clinker and explores the potential of boron oxide (BO) as a stabilizing agent. Clinker production is a major contributor to global carbon dioxide emissions, and finding sustainable solutions is paramount. At 1350 °C, the HFPC clinker exhibits severe pulverization due to the metastable nature of the CS phase formed at low temperature. To address these challenges, various stabilizing agents, including KO + NaO, barium carbonate (BaCO), calcium fluoride (CaF), and BO, were investigated. KO + NaO, BaCO, and BO exhibited promising stabilization effects, although KO + NaO negatively impacted the stability, and BaCO resulted in significant retardation. Consequently, BO was chosen as the preferred stabilizing agent for the low-temperature calcination of HFPC clinker. However, it was observed that the BO content should not exceed 1% to prevent destabilization of the CS phase, which affects early-stage strength development. This research contributes to the understanding of HFPC clinker stability under low-temperature conditions and provides a potential avenue for reducing energy consumption and carbon emissions in HFPC clinker production.
本研究深入探讨了高铁酸盐波特兰水泥（HFPC）熟料低温煅烧所带来的挑战，并探索了氧化硼（BO）作为稳定剂的潜力。熟料生产是全球二氧化碳排放的主要来源，因此寻找可持续的解决方案至关重要。在1350°C时，由于低温下形成的CS相的亚稳性质，HFPC熟料表现出严重的粉化现象。为应对这些挑战，研究了各种稳定剂，包括KO + NaO、碳酸钡（BaCO）、氟化钙（CaF）和BO。KO + NaO、BaCO和BO均表现出有前景的稳定效果，尽管KO + NaO对稳定性有负面影响，且BaCO导致显著的缓凝。因此，BO被选为HFPC熟料低温煅烧的首选稳定剂。然而，观察到BO含量不应超过1%，以防止CS相失稳，这会影响早期强度发展。本研究有助于理解低温条件下HFPC熟料的稳定性，并为降低HFPC熟料生产中的能源消耗和碳排放提供了一条潜在途径。
