制备高活性氧化镁膨胀剂的关键工艺条件  

The Key Fabrication Conditions for Highly Reactive MgO Expansive Agents

作　　者：梁洪滔 区光烽 张大康 LIANG Hongtao;OU Guangfeng;ZHANG Dakang(Guangdong Zhidao Advanced Civil Engineering Materials Technology Research Co.,Ltd.;Foshan Huijiang Concrete Co.,Ltd.)

机构地区：[1]广东至道先进土木工程材料技术研究有限公司 [2]佛山市汇江混凝土有限公司

出　　处：《广东建材》2025年第3期13-17,共5页Guangdong Building Materials

摘　　要：试验系统性探究了煅烧条件对菱镁矿及白云石制备高活性氧化镁膨胀剂(MEA)的影响规律。结果表明:相比白云石,菱镁矿更适用于制备高活性MEA;700℃~800℃范围内,4.75mm粒径以下菱镁矿颗粒基本完全分解;保温时间与煅烧温度应根据所需的膨胀剂活性、窑烧设备和能耗标准进行综合选择;温度均匀性是影响MEA成品活性的关键,实际生产中,应优选回转窑等先进煅烧设备,避免出现温度不均的情况。该试验结果为产业化煅烧菱镁矿制备高活性MEA的生产工艺明确了重要控制因素。This study systematically investigates the impact of calcination conditions on the production of highly reactive MgO expansive additives(MEA)using magnesite and dolomite as source materials.The findings suggest that magnesite is a more suitable source material for the production of highly reactive MEA compared to dolomite.Additionally,the decomposition of magnesite particles with a size<4.75mm is mostly complete within the temperature range of 700~800℃.Furthermore,the calcination condition must be optimized by balancing the trade-off between the required reactivity,kiln types,and energy consumption.The reactivity of MEA is highly sensitive to the calcination condition,with temperature distribution playing a crucial role in the production process.To achieve optimal results,rotary kilns or other advanced kilns are recommended to maintain a uniform temperature distribution.The experimental findings of this study offer significant contributions to the optimization of calcination conditions for the production of highly reactive MEA.

关 键 词：菱镁矿 氧化镁膨胀剂 煅烧工艺 

分 类 号：TQ1[化学工程]