Effect of waste bischofite on low-temperature calcination of hydromagnesite and its application in the preparation of magnesium oxychloride cement
廃ビショファイトがハイドロマグネサイトの低温焼成に及ぼす影響とマグネシウムオキシクロリドセメント調製への応用 (AI 翻訳)
Zhifu Zhou, Lingyun An, Chenggong Chang, Jinmei Dong, Jing Wen, Weixin Zheng
🤖 gxceed AI 要約
日本語
本研究は、廃棄物であるビショファイトを微量添加することで、ハイドロマグネサイトの分解温度を下げ、700℃・2時間で完全分解を可能にする省エネ焼成戦略を提案。これにより、軽焼マグネシア粉末（LBMP）を低温で製造でき、燃料消費と炭素排出を削減しつつ、廃棄物のリサイクルも実現。得られたMgOは高活性で、マグネシウムオキシクロリドセメント（MOC）の機械的特性を向上させる。
English
This study proposes an energy-saving calcination strategy that reduces the decomposition temperature of hydromagnesite by adding trace waste bischofite, enabling complete decomposition at 700°C in 2 hours. This allows low-temperature production of light-burned MgO, reducing fuel consumption and carbon emissions while recycling waste. The resulting MgO is highly reactive, improving the mechanical properties of magnesium oxychloride cement.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の建材・セメント産業における省エネと廃棄物リサイクルに寄与する可能性がある。ただし、GX政策との直接的な関連は薄く、炭素排出削減効果は限定的。
In the global GX context
This paper offers a novel approach to reducing carbon emissions in the cement industry through energy-efficient calcination and waste recycling, aligning with global efforts to decarbonize industrial processes.
👥 読者別の含意
🔬研究者:低温焼成技術と廃棄物触媒のメカニズムに関する知見を提供。
🏢実務担当者:セメント製造における省エネと廃棄物利用の可能性を示す。
📄 Abstract（原文）
Currently, MgO is primarily obtained through the calcination of magnesite. To ensure complete decomposition of the ore, the preparation temperature for LBMP (light-burned magnesium oxide powder) is typically maintained above 800 °C, with processing times exceeding 2 hours. This study proposes an energy-saving calcination strategy that reduces the decomposition temperature of hydromagnesite (4MgCO3·Mg(OH)2·4H2O) by incorporating trace amounts of waste bischofite. Furthermore, multiple technical approaches were employed to investigate the mechanism of this calcination strategy and its feasibility for producing magnesium oxychlorite cement. Results demonstrate that this method enables complete decomposition of MgCO3 in magnesite at 700 °C within 2 hours of calcination, yielding MgO exhibiting excellent dispersion and reactivity. During the calcination process, bischofite acts as a catalyst to promote the complete thermal decomposition of MgCO3 in hydromagnesite. Bischofite begins to decompose before the carbonate ions in hydromagnesite, creating an acidic environment inside the furnace. During the reaction between HCl and MgCO3, MgCl2 is generated, forming a thermal reaction cycle that continues until MgCO3 is completely consumed.This process effectively prevents the formation of large amounts of Mg(OH)2 induced by amorphous MgCO3 during the hydration of active MgO. Consequently, more active MgO transforms into coarse, needle-like Phase 5, filling the pores and matrix of MOC, significantly enhancing the mechanical properties of the prepared MOC. This indicates that this method can be used to prepare LBMP at lower calcination temperatures while ensuring the performance of the MOC cementitious material produced. This method not only effectively recycles waste bischofite, but the lower calcination temperature will also reduce fuel consumption, thereby reducing mineral stockpiles on the one hand and lowering carbon emissions on the other.
🔗 Provenance — このレコードを発見したソース
- scidb https://doi.org/10.57760/sciencedb.0119cfirst seen 2026-09-03 06:10:05
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